Subjects: Biology >> Botany >> Applied botany submitted time 2024-03-26 Cooperative journals: 《广西植物》
Abstract： To promote the restoration and reconstruction of ecosystem in the water-land ecotone, based on typical sample investigation, the variation patterns of vegetation species composition and diversity, and soil nutrients under different vegetation types were studied using Pearson correlation coefficient method and redundancy analysis method. The results were as follows: (1) There were significant differences in plant community structure and species diversity of different vegetation types (gravel zone, grass zone, shrub-grass zone, trees zone). As the submersed duration decreased, the water-land ecotone gradually evolved from scattered herbaceous plant communities to grass, shrub, and tree plant communities, and the α diversity of vegetation species (Shannon-Wiener index, Pielou index and Simpson index ) and vegetation coverage showed a gradually increasing trend, which were lowest value on the gravel zone and the highest on the trees zone. (2) There were significant differences in soil nutrient content among different vegetation types. With the decreased of submersed duration, soil organic matter content gradually increased, while soil water content, available nitrogen, available phosphorus, and available potassium showed a trend of first increasing and then decreasing, the maximum values of these nutrients mostly occurred in shrub-grass zone or trees zone, followed by grass zone, and gravel zone was the lowest. (3) Correlation and redundancy analysis showed that soil available nitrogen, available potassium, available phosphorus and organic matter were significantly positively correlated with various indicators of vegetation species α diversity, among which soil available nitrogen and available potassium had the strongest correlation with vegetation species diversity. In conclusion: different vegetation types in the Lijiang water-land ecotone have heterogeneous patterns of vegetation species composition and diversity as well as soil nutrients. Moderate submergence is beneficial for vegetation community aggregation and promoting soil nutrient accumulation. Herbaceous plants have stronger adaptability to moderate submergence environments. During the ecological restoration process of the Lijiang water-land ecotone, it is necessary to design restoration plans for different vegetation types and fully consider the relationship between vegetation species diversity and soil available nutrients.
Subjects: Geosciences >> Geography submitted time 2024-03-01 Cooperative journals: 《干旱区研究》
Abstract： The proposed Aerxiangou section of the Duku expressway, characterized by high mountainous terrain and canyons, faces frequent avalanches due to heavy snowfall and climate change. In this study, a collaborative investigation using UAV remote sensing interpretation and field research identified 92 avalanche points. In addition, elevation, slope, surface cutting degree, ground roughness, maximum snow depth, maximum wind speed, average temperature, and average snowfall were selected as driving factors. A geographical detector was used to examine the relationship between terrain factors, different resolutions, and avalanche stability. The results of this study revealed strong avalanche activity with generally poor stability in the study area. However, it was reassuring to note that most avalanche release and activity areas are located on mountain slopes. The accumulation area lies on the valley floor, a considerable distance away from the planned road route, thus minimizing its impact. Results from the geographical detector analysis suggest positive correlations between interpretations of slope and ground roughness with snow avalanche stability across varying resolutions. The interactive detection results are both double-factor enhancement and nonlinear enhancement, with the latter being more significant than the former. The combination of slope and other factors is crucial for determining the impact of avalanche stability. This study offers reliable data support for assessing avalanche vulnerability and risks, thereby establishing a solid scientific basis for constructing and operating the Duku expressway.
Subjects: Geosciences >> Geography submitted time 2023-12-16 Cooperative journals: 《干旱区研究》
Abstract： This study was implemented to accurately identify the avalanche flow characteristics and flow information, and comprehensively analyze avalanche motion. This study was based on UAV tilt photography technology to obtain high-resolution aerial photography data, taking the avalanche-prone area of Aerxiangou as an example. Through on-site investigation and UAV remote sensing interpretation to detect avalanche activity in a high-resolution manner, the goals were to determine the input parameters of the RAMMS model, to simulate and reconstruct different types of avalanche events on this basis, and to comparatively analyze the differences among the results of conventional ground-based investigation, UAV remote sensing interpretation, and simulation results to explore avalanche activity in different types and different snow layer release conditions. The results of the study show that (1) the avalanche investigation and analysis system based around tilt photography technology, which combines conventional ground- based investigation methods with UAV remote sensing and numerical simulation to verify each other, improves the accuracy of the assessment of disaster development status. (2) In mid- February, the snow on the slopes of Aerxiangou approaches the critical thickness value, and continuous snowfall destabilizes the snow layer and triggers new avalanches. The investigation is still in the disaster breeding stage, the snow layer cracks intensified deformation, the role of the wind snow eave self- weight gradually increased, there is more than the trend of the breaking strength of the snow, and the overall stability is poor. (3) In slope-type avalanches with a snow platform above the slope surface as the potential release area, the release volume can reach 8.2669 × 104 m3, the movement duration is about 128 s, and the flow height of the accumulation area peaks in 120 s at about 3.55 m, the flow velocity is about 18.34 m·s-1, and the impact force is about 32.67 kPa. In addition, the accumulation area is formed into an accumulation with an area of 3369.7 m2 and a volume of 1.8525×104 m3 of the pile. Through mutual verification, the slope-type avalanche does not involve release of the snow platform, and there is a discrepancy between the ground- based investigation results and numerical simulation interpretation results. (4) Trench-slope composite avalanches are released by fracture of the snow layer on the trench-slope, where the depth of fracture is only about 60% of the critical thickness value, the avalanche duration is close to 300 s in this case, and the impact range is 1178.5 m2 in the accumulation area, with an average accumulation depth of 1.64 m. The flushing-out volume is 3107.76 m3, the maximum flow rate in the accumulation area is 6.58 m·s− 1, and the maximum impact force is 17.97 kPa. The results of the ground-based investigation are roughly the same as those of the numerical simulation based on the 3D model. The results of the study have improved the accuracy with which avalanche event information can be acquired and can provide strong data support and a scientific basis for predicting future avalanche potential hazards, risk avoidance, and disaster emergency response.
Subjects: Biology >> Botany submitted time 2023-08-24 Cooperative journals: 《广西植物》
Abstract：为了探究谷胱甘肽转移酶编码基因（GST）在芥菜花青素积累中的作用，该文以紫薹 -绿薹芥菜近等基因系为材料，克隆到1 个花青素积累相关的GST 基因，命名为BjGSTF12。 该文对BjGSTF12 编码蛋白及其启动子进行生物信息学分析，并分析其在绿薹、紫薹芥菜中 的表达水平及其与花青素含量的关系。结果表明：（1）BjGSTF12 的基因组和cDNA 全长 分别为808、651 bp，编码216 个氨基酸，具有GST_N 端和GST_C 端保守结构域。然而， 绿薹、紫薹芥菜BjGSTF12 序列无区别。（2）BjGSTF12 与拟南芥AtGSTF12 亲缘关系最近， 同属于亚类。（3）2 个芥菜品系BjGSTF12 启动子序列存在4 处碱基突变/插入，但二者顺 式作用元件种类与数目相同，均含9 个MYB 结合位点、1 个赤霉素响应元件、3 个非生物 胁迫响应元件。（4）紫薹芥菜花青素含量显著高于绿薹芥菜的，BjGSTF12 表达水平与花青 素含量表现出类似变化规律。（5）互作蛋白网络分析表明，BjGSTF12 与花青素合成关键 酶、糖基化修饰、转运蛋白等蛋白存在互作。因此，BjGSTF12 在芥菜薹茎花青素积累中可 能发挥重要作用，推测BjGSTF12 可能通过互作蛋白调控芥菜花青素合成、修饰、转运从而 影响花青素积累。综上所述，该文对进一步深入研究GST 在芥菜薹茎花青素积累的功能及 作用机制奠定一定理论基础。
Subjects: Psychology >> Social Psychology submitted time 2023-03-28 Cooperative journals: 《心理科学进展》
Abstract： The highly competitive and uncertain external environment requires higher levels of organizational flexibility and adaptability. Therefore, organizations and scholars have paid more attention than ever to employee's organizational citizenship behavior (OCB), as it can improve viability, competitiveness, and performance of the organization. Although scholars have exerted considerable efforts to investigate OCB, the dominant approach in the existing literature frames OCB as a relatively stable variable, omitting a dynamic understanding of OCB in the workplace. From the organizational socialization perspective, the current study particularly focuses on how OCB changes over time in newcomers' or job changers' organizational socialization processes as well as its associated mechanism and boundary conditions. This study contributes to a comprehensive theoretical framework of how to motivate employees to continuously show higher levels of OCB.
Subjects: Psychology >> Social Psychology submitted time 2023-03-27 Cooperative journals: 《心理学报》
Abstract： According to linguistic relevance hypothesis (LRH), people have the ability to categorize the world that they have experienced, influenced by language and culture. Thus, researchers who agree with LRH argued that people with different language organizing experiences should have different world schemas.Some relevant arguments came from research on the relationship between color word and color cognition: color perception should be influenced by the physical properties of the light wave and the biological characteristics of the human eye, and also by language and culture. Although there is no clear boundary among the various visible light–waves from red to violet at the perceptual level, the continuous spectrum is divided into different color regions. In the literature, a “color category perception effect” was proposed that people were more likely to distinguish colors from different colors than those that landed in the same area. However, it has still lacked of discussions on the essential mechanism of this effect. Namely, it is still not clear whether this effect is a perceptual phenomenon or cultural phenomenon (i.e., effects from language application and language labels). Using perceptual task (Experiment 1) and classification tasks containing memory (Experiment 2 and 3), assumption that language application and language labels affect color categorizing was tested in the present study. In Chinese, there are clear and distinct language labels for colors RED, PURPLE, BLUE, and GREEN in Chinese, but intensities of relevance between RED and PURPLE and between BLUE and GREEN are different in everyday expressions (language application): connection of the mental conception (conceptual connection) between RED and PURPLE is much closer than those between BLUE and GREEN. With the boundary colors of the “red–purple” color pair (RGB: 255, 0, 255) and the “blue–green” color pair (RGB: 0, 255, 255) as base points, a vertical demarcation line was drawn on the RGB chromatography. Four color blocks of different lightness saturation levels were randomly selected, upon which two colors on both the left and right sides of the boundary were selected respectively. The distance between two neighboring color blocks (including two neighboring colors that are on either side of the color boundary) is equal on the chromatography. In Experiment 1, three colors that have equal optical range constitute one set of experimental material. Participants were asked to judge as quickly and as accurately as possible whether the left or the right color block looked more similar to the middle one, and to press the corresponding button on a response box. 30 college students from the Han nationality participated in the experiment. In Experiment 2, materials were identical to Experiment 1 and 44 college students from the Han nationality were instructed to remember the colors and to identify as quickly and as accurately as possible whether the following colors belong to the left or to the right of the color pair, and to press the corresponding button on a response box.In Experiment 3, using identical materials, 44 participants were asked to judge as quickly and as accurately as possible whether the left or the right color looked more similar to the standard one, and to press the corresponding button on a response box. Results showed that intensity of conceptual connection effect was not involved in perception task, but in classification tasks and recognition tasks. Conceptual connection, rather than language labels, which might be triggered by comparison, was the main reason that affected performances of classification. According to the present findings, we believe that language labels and conceptual connection are both intermediate in color processing, and coding of colors in memory has a direct function in this process.
Subjects: Psychology >> Social Psychology submitted time 2023-03-27 Cooperative journals: 《心理学报》
Abstract： Problem lottery playing has received increasing attention nowadays. Previous studies reveal that lottery-specific beliefs, such as lottery attitudes, risk perception, and irrational belief, play significant roles in the development and maintenance of problem lottery playing which are mostly based on social-cognitive theory or theory of planned behavior. Few studies have investigated the relationship between general belief and problem lottery playing. Fate control, as an important general belief, provides an account of our experiences and is also a form of meaning. Studies have shown that fate control is correlate with various psychological indicators (e.g., negative affect, study intention, and problem gambling), and it is particularly strong in Asian cultures. However, little is known about the effect of fate control on problem lottery playing and its mediators explaining this relationship. In the perspective of meaning maintenance model, this study aimed to examine the effect of fate control on problem lottery playing, and the mediating roles of avoidance motivation, illusion of control, and expectation deviation. A sample of 2241 sport lottery players (1592 male, 649 female) were recruited for the study. They were required to complete a battery of self-report questionnaires. Fate control was measured by the subscales of Social Axioms Survey. Avoidance motivation was measured by subscales of lottery playing motivation adapted from five-factor gambling motivation scale. Illusion of control and expectancy were measured by subscales of lottery related cognitions adapted from Gambling Related Cognitions Scale. Problem Gambling Severity Index was adapted to access problem lottery playing. Data was analyzed by using SPSS 17.0 and MPLUS 7.0 which was specifically developed for assessing the complex models with the bias-corrected percentile Bootstrap method. The results of the study showed that fate control, avoidance motivation, illusion of control, expectancy were positively related to problem lottery playing; fate control was positively related to avoidance motivation, illusion of control, expectancy; avoidance motivation was positively related to illusion of control and expectancy. Structure equation modeling revealed significant prediction of fate control on avoidance motivation, illusion of control, expectancy and problem lottery playing. Avoidance motivation, illusion of control and expectancy mediated the relationship between fate control and problem lottery playing. Moreover, avoidance motivation could mediate the relationship among fate control, illusion of control and expectancy. The mediating effect contained five paths: the mediating effect of avoidance motivation, of illusion of control, and of expectancy, the serial mediating effect of avoidance motivation and the serial mediating effect of illusion of control, avoidance motivation and expectancy. The present study offers the following major contributions. First, we investigated the effects of fate control on avoidance motivation, illusion of control, expectancy and problem lottery playing, which support the negative side of fate control. Second, the present study explored the meaning maintenance mechanism of fate control on problem lottery playing by identifying the central role of avoidance motivation based on meaning maintenance model, which broadens the research perspectives of problem lottery playing. Third, this study revealed that general fate control belief could indirectly facilitate problem lottery playing through lottery- specific beliefs.
Subjects: Psychology >> Social Psychology submitted time 2023-03-27 Cooperative journals: 《心理学报》
Abstract： Retrieval-induced forgetting (RIF) refers to the phenomenon, in which individuals may forget related information during the retrieval process whenever they try to remember something. Studies have shown that “self-reference” is one of the boundary conditions of RIF in the Western cultural context, indicating that RIF is only eliminated when the recalled materials are related to self-concept (known as the “self-referential effect”). In the Chinese culture, however, RIF was observed under the conditions of self-reference and maternal reference. The Mosuo people are raised in a matrilineal society, in which they are familiar with their mothers and aunts to the same extent. Such people consider their aunts and natural mothers as equally important. Conversely, the Han is a patriarchal society that differs considerably from the orientation of the Mosuo’s. This study aimed to explore the influence of the culture and language of the Mosuo and Han on their self-cognition and processing, especially the influence of their aunts on their self-conception.Tested participants included 131 Mosuo and 126 Han from Yunnan’s Ninglang District. The experiment had a 2 (Nationality: the Mosuo, the Han) × 4 (Conditions: Self-reference, Mother-reference, Aunt-reference, Other-reference) × 3 (Retrieval Factor: Rp+, Rp-, or Nrp items) design. Nationality and condition were manipulated as between-subject factors, and the retrieval factor was manipulated as a within-subject factor. The study had four phases. (1) Study phase: Participants were shown Chinese characters on the monitor, with a series of 32 category exemplars in random order. They were instructed to memorize the exemplars while associating them with the paired category. (2) Retrieval-practice phase: Here, participants were sequentially presented with word-pair forms of eight cues that could probe their memory. Each cue comprised a category name and a first initial character of an exemplar. Participants were asked to recall the target exemplar in the written form in response to each cue. (3) Distractor phase: Participants were requested to perform mathematical operations within three minutes. (4) Final test phase: Participants were required to produce a written recall of as many exemplars as possible in response to each presented category name.Results indicated that (1) in the Mosuo culture context, RIF was not observed under self-referential, mother-referential, and aunt-referential encoding, and was found only for other-referential encoding, and (2) for Han participants, RIF was observed in the aunt-referential and the other-referential encoding, but not in the self-referential and mother-referential encoding. The present findings demonstrate that, first, in the Han and Mosuo cultures, self-reference and maternal reference are the key factors that cause RIF. Second, in the Mosuo culture, aunt-reference is another key factor that influences RIF aside from self-reference and maternal reference. Aunts who are integrated in the self-concept of the Mosuo people are also important to such individuals. Finally, (3) language and culture are crucial factors of self-formation and development.
Subjects: Psychology >> Social Psychology submitted time 2023-03-27 Cooperative journals: 《心理学报》
Abstract： Recent approaches on embodied cognition and theories of semantic and conceptual “grounding” have emphasized the role of perceptual and motor skills in language comprehension and action understanding. Evidence on the role of sensorimotor information in language processing has been obtained from behavioral and neuroimaging studies. These findings have been taken as a support for the claim that language is understood through sensorimotor simulations of actions and events being described. The theory on Perceptual Symbol Systems holds that the sensorimotor system participates in the language comprehension process, which is an empirical simulation of a situation through a series of complex language cues. Chinese characters may show different characteristics from English words because semantic radicals are linked with the meaning of these characters. These semantic radicals may affect the embodied effect of Chinese characters.In the study, authors used single-character body action verbs in Chinese as experimental materials. Body action verbs are words that use body parts to perform mechanical movements. The directional semantic feature of body action verbs reflects the direction of physical space and can be perceived. Experiment 1 investigated the influence of semantic direction on the spatial judgment of an arrow direction in the motion channel under whole word priming. The repeated measurement design of 2 (Chinese character embodied direction: up/down) × 2 (arrow direction: up/down) was adopted. Thirty-five participants volunteered in this study. Experiment 2 investigated the influence of semantic orientation on the spatial judgment of letter orientation in visual channels under whole word initiation. The repeated measurement design of 2 (Chinese character direction: up/down) × 2 (letter position: up/down) design was used. Thirty-eight participants took part in this experiment. Experiment 3 investigated the embodied simulation of the semantic radical and whole character under the radical priming paradigm. Chinese body action verbs formed by semantic radicals “扌” and “?” were used as experimental materials. A within-subject design of 2 (priming type: semantic radical’s priming/control priming) × 3 (character type: consistent/inconsistent) × 3 (SOA: 43 ms/72 ms/243 ms) was used. Before the behavioral experiment, the participants were asked to hold their hands up for one minute to reinforce the bodybuilding experience of having their hands above and their feet below. Character type shows the direction and orientation between the character and its semantic radical. Consistent character type means that the character and its semantic radical have a similar direction and orientation. For example, the semantic radical “?” means “foot, ” which is below the body. Thus, “蹲” is a consistent character, whereas “跳” is an inconsistent character.Results suggest the following: (1) When Chinese characters are in a downward semantic direction, the downward arrow is judged faster than the upward arrow. When characters are in an upward semantic direction, the direction of the arrow has a null effect. (2) Chinese characters with upward semantic movement can be used to recognize upper letters more quickly and characters with downward semantic movement can be used to recognize lower letters more quickly. (3) In the middle and late stages of Chinese character processing, the response of consistent and inconsistent Chinese characters is significantly different, indicating that the semantic radical is activated from the middle stage of the Chinese character processing until the late stage.The present findings demonstrate the following: (1) An action-character compatibility effect is present in Chinese body movement verbs in the movement and visual channels. Understanding Chinese body movement verbs is a cross-channel embodied simulation process. (2) The semantic radical activation of the phonogram starts from the middle stage to the late stage of Chinese body action verb processing. A semantic understanding of Chinese body action verbs has an embodied simulation at the whole character and component (semantic radical) levels.
Subjects: Psychology >> Social Psychology submitted time 2023-03-27 Cooperative journals: 《心理学报》
Abstract： Metaphors are among cognitive styles, which refer to the construction of psychological ideas using other concepts. The core of our conceptual system is derived directly from our experience of perception, physical movement, and social characteristics. Embodied philosophy is the philosophical foundation of cognitive linguistics and closely related to the study of metaphors. In terms of spatial metaphors, “up” is generally believed to represent morality, enthusiasm, and high status, while “down” represents immorality, negativity, and low status. With regard to weight metaphors, “heavy” generally denotes high authority and more respect, while “light” depicts low authority and less importance. Kinship is one of the social relationships formed on the basis of blood relations and marriage. In every language, numerous words represent kingship, which are called kinship words. The purpose of this study is to explore whether kinship words can be represented by concepts of “up-down” and “heavy-light” and whether gender culture has an impact on the spatial and weight metaphors of kinship words.Three experiments are conducted in this study, with over 100 volunteer participants for each experiment, involving 30 individuals from three nationality groups. All the participants are from Yunnan Province, with the same academic qualifications but different cultural backgrounds. The kinship words in the materials are paired with gender from the same generation, such as “father-mother”, “brother-sister”, and “son-daughter”. In Experiment 1, a pair of kinship words is presented on the screen vertically, while the participants are asked to judge whether both words are kinship words. In Experiment 2, a pair of kinship words is presented on the screen horizontally before a picture of a balance is shown, and the participants are asked to judge the tilt direction of the balance. In Experiment 3, a picture of a balance appears before a pair of kinship words is presented, and the participants are asked to judge the position of the male/female words.Studies have shown that (1) the Bai, Yi, and Mosuo people are influenced by the concept of seniority when processing kinship words, which is closely related to the tradition of showing respect and love to elders. (2) Kinship words could be represented by “up-down” and “heavy-light” concepts, with “up/heavy” representing high power and more respect and “down/light” representing low power and less importance. (3) Cultural schema affects the metaphorical representation of kinship concepts. Moreover, gender culture has an influence on the spatial space and metaphor of kinship words. Metaphorical consistency between male and “up/heavy” among the Yi people and between female and “up/heavy” among the Mosuo people is observed, whereas male/female concepts are not significantly related to “up/down” and “heavy/light” concepts among the Bai people.Most previous studies on kinship words have studied spatial metaphors and mainly focused on the structure of kinship words. The present study considers spatial and weight metaphors and is innovative in terms of gender culture perspectives. We find that the gender concepts of the three nationalities have different connections with spatial and weight concepts, which demonstrates the impact of gender culture on cognition.
Subjects: Biology >> Botany >> Applied botany submitted time 2022-08-05 Cooperative journals: 《广西植物》
Abstract： Excentrodendron tonkinensis is a constructive species of karst seasonal rainforest and an obligate karst plant, which is also one of the national secondary key protected wild plant and an IUCN endangered plant, with high economic and ecological value. However, there is still a lack of understanding of how the potential suitable areas of Excentrodendron tonkinensis change in the context of global change and its key driving factors, which affect the scientific protection and utilization of Excentrodendron tonkinensis.To assess the impacts of climate change on the extents of the habitat of Excentrodendron tonkinensis, we used the Maximum-entropy model to analyze the potential changes in the geographical distribution in China of future climate scenarios SSP1-2.6 and SSP5-8.5), and tested the influence of the karst geological background distribution on predicting the suitable areas of karst obligate plants. The results show that: (1) in the case of adding karst geological background data, the average AUC of the prediction model for the suitable area is 0.997, which has a good prediction effect. And the model prediction results are strictly limited to the karst region, consistent with the characteristics of Excentrodendron tonkinensis which is karst obligate plant; (2) According to the fitting results of the model, the karst geological background, precipitation of warmest quarter(800-950 mm), and the min temperature of coldest month(7-11 ℃) are the key factors limiting the distribution of Excentrodendron tonkinensis; (3) with the increase of temperature in the future, the area of potential suitable areas for Excentrodendron tonkinensis would expand to higher latitudes karst areas. Large numbers of areas of stable habitats exist in parts of southwest Guangxi and southeastern Yunnan. These results suggest that the karst geological distribution is essential as predicting the potential geographic distribution of karst obligate plants such as Excentrodendron tonkinensis; if the temperature continues to rise in the future, its potential suitable areas will expand to high latitudes, and the degree of endangerment may be affected by climate, which means it is not obvious under the influence of climate changes; parts of southwestern Guangxi and southeastern Yunnan are suitable areas for the conservation and utilization of Excentrodendron tonkinensis under the climate changes in the future.
Subjects: Biology >> Botany >> Applied botany submitted time 2022-06-29 Cooperative journals: 《广西植物》
Abstract： In order to study the adaptive strategy of dominant tree species in a karst seasonal rain forest to heterogeneous habitat conditions, seven dominant tree species in a virgin forest in Nonggang, China, were taken as the research objects. The leaf micromorphological indexes of adult individuals of each tree species and the photosynthetic indexes of leaves in the growing season of these trees were measured. The ecological adaptability of these leaf structural and functional indexes to the habitat gradient in the karst peak cluster depression landform was tested. The results were as follows: (1) Along the karst habitat gradient from depression to peak, nine leaf micro-morphological indexes, such as leaf compactness, palisade tissue thickness, cuticle thickness, and upper epidermis thickness, showed a significant upward trend, while leaf looseness showed a significant downward trend. (2) Along the karst habitat gradient from depression to peak, the light compensation point, dark respiration efficiency, and maximum transpiration rate of these leaves all showed a significant upward trend. However, the maximum water use efficiency, the maximum intercellular CO2 concentration, and the apparent quantum efficiency showed a significant downward trend. (3) Leaf compactness was positively correlated with photosynthetic and transpiration ability indexes. Leaf looseness was negatively correlated with these two types of indexes. The above results show that there is a trade-off relationship between photosynthetic efficiency and drought tolerance in leaf functional traits of dominant tree species in the karst seasonal rain forest. Trees distributed in the depressions have obvious adaptive characteristics to weak light. Trees distributed on the middle slopes show extensive habitat adaptability. Due to the limitation of strong light, high temperature and exposed rock, the trees distributed on the mountain peaks show strong drought adaptability and conservative ecological adaptive strategies.
Subjects: Biology >> Botany >> Applied botany submitted time 2021-12-19 Cooperative journals: 《广西植物》
Abstract： Different varieties have different resistances. In order to further explore the resistance differences in different varieties of pitaya fruit and provide a reference for further study on breeding of pitaya fruit resistance. Our study using Illumina HiSeq 2000 sequencing platform to sequencing the transcriptome of ‘Putongbairou’ （BR） and ‘Ecuador Yellow’ （EY）. Functional classification and enrichment analysis of differentially expressed genes （DEGs） were performed by reference to GO Ontology, KEGG and others databases. The results were as follows: (1) There were 14 248 DEGs between BR and EY, of which 5 446 genes were up-regulated and 8 802 genes were down-regulated. (2) GO functional analysis showed that these DEGs are mainly involved in enzyme catalytic activity, cell components, metabolic processes, etc. Among them, there were 349 differential genes involved in oxidoreductase activity. (3) KEGG pathway analysis showed that most of the DEGs were enriched in metabolism, biosynthesis, etc. , and 12 key genes such as CYP86 and CER1 involving in Cutin, suberine and wax biosynthesis. We found the expression of DEGs involved in oxidoreductase activity were higher in BR than that in EY, which significantly enriched, indicating that may be differences in growth and cell metabolism between BR and EY. DEGs involved in the biosynthesis of Cutin, suberine and wax biosynthesis were up-regulated in BR. Such genes have higher expression in BR, and significantly enriched, suggesting that BR may be superior drought and disease resistance than EY.
Subjects: Management Science >> Enterprise Management submitted time 2021-07-29
Abstract： "
Peer Review Status:
Awaiting Review
Subjects: Computer Science >> Integration Theory of Computer Science submitted time 2019-05-10 Cooperative journals: 《计算机应用研究》
Abstract： With the rapid development of mobile Internet services, mobile applications such as augmented reality, virtual reality, and ultra clear video have become popular and IoT applications are emerging. The limited computing power and the lack of endurance of smart terminal devices are becoming more and more inadequate for these applications. Aiming at this situation, this paper proposes a computational offload strategy based on improved auction algorithm under the premise of combining intelligent device performance and server resources in the scenario of multi-user and multi-MEC server, the strategy consists of two important phases: the unloading decision-making phase. By considering the calculation task size, computing requirements and server computing power, network bandwidth and other factors, this paper proposes the basis for the uninstallation decision; In the task scheduling phase, by considering the time requirements of the computing task and the computing performance of the MEC server, this paper proposes a task scheduling model based on improved auction algorithm. The experiment proves that the computational offloading strategy proposed in this paper can effectively reduce the service delay, reduce the energy consumption of smart devices, and improve user satisfaction.
Subjects: Biology >> Bioengineering submitted time 2019-01-17 Cooperative journals: 《中国生物工程杂志》
Abstract：目的：基于GC-FID法，对狂犬病疫苗生产过程中采用的β-丙内酯灭活剂进行了含量及稳定性研究。方法：气相色谱条件：采用Agilent DB-624（30 m×0.530 mm×3.00 μm）毛细管柱；升温程序：初始温度为80 ℃，保持1 min，以20 ℃/min的速率升温至200 ℃，保持3 min；色谱柱流量：3 mL/min；检测器温度：250 ℃；进样口温度：150 ℃；载气：氮气，线速度：25 cm/sec；进样量：1 μL，分流比为2:1，进样方式：手动进样。结果：以乙腈作为稀释剂，BPL在1:100～1:32000范围内线性关系良好（R2≥0.999）。在1:200、1:1000、1:8000 三个浓度水平下，加标回收率在95.04%～116.86%之间，相对标准偏差（RSD）为2.6%～3.2%，检测限为0.112 μg/mL。结论：该方法简便、专属性强、稳定且在室温条件下操作，大大降低了对试验条件和技术操作的要求，能够满足灭活狂犬病病毒工艺中对BPL检测的需求。
Subjects: Computer Science >> Integration Theory of Computer Science submitted time 2018-10-11 Cooperative journals: 《计算机应用研究》
Abstract： In mining algorithm for high utility itemsets with multiple minimum utility threshold (MHUI) , calculation is often repeated and mining result itemsets are not frequent . This paper developed two new爁ast爉ining燼lgorithm SFMHUI and FMHUI. The FMHUI algorithm used the previous calculation result in the calculation of the minimum utility threshold of the itemsets, avoiding duplicate comparisons燽etween爄tems; in addition, the FMHUI algorithm defined the minimum utility threshold table EMMU-table of extensions of items to quickly calculate the minimum utility threshold of extensions, improving the爀fficiency. The SFMHUI algorithm added the support constraints on the basis of FMHUI, making the爉ining爄temsets燽oth爃igh-utility燼nd爁requent. The result from simulation experiments shows that the proposed algorithms are efficient and feasible.
Subjects: Biology >> Bioengineering submitted time 2018-07-15 Cooperative journals: 《中国生物工程杂志》
Abstract：星形胶质细胞上调基因-1（astrocyte elevated gene-1，AEG-1）在多种肿瘤中过表达，参与肿瘤的形成、转移等过程。本实验利用CRISPR/Cas9技术敲除AEG-1基因并研究其在胶质瘤细胞转移过程中的作用。首先设计构建sgRNA/Cas9二合一表达载体并转染到人胶质瘤U251细胞中，通过TA克隆测序鉴定sgRNA的活性；然后筛选建立稳定的AEG-1敲除U251细胞系，并利用Western blot实验检测AEG-1的敲除效率；最后利用Transwell小室、划痕实验评价AEG-1敲除后对肿瘤细胞迁移能力的影响。结果显示，成功构建靶向敲除AEG-1基因的sgRNA/Cas9二合一表达载体，所构建的载体与实验设计相一致，通过TA克隆测序鉴定sgRNA有活性；成功建立稳定的AEG-1敲除U251细胞系，Western blot实验结果表明敲除效率高达98％；Transwell小室实验、划痕实验结果表明AEG-1敲除U251细胞系的转移能力明显降低。
Subjects: Computer Science >> Integration Theory of Computer Science submitted time 2018-04-17 Cooperative journals: 《计算机应用研究》
Abstract： In social networks, people often creates morphs to replace some entity names. How to resolve these morphs to their real target entities is a very important task for natural language processing. In order to overcome the shortcomings that existing methods cannot resolve morphs accurately, this paper proposed a morph resolution method based on effective context information. This method extracted the effective context information of morphs and target candidates, and integrated the effective context information into autoencoders in order to get more accurate embedding of morphs and their target candidates. This method then calculate the similarity between morphs and target candidates based on the accurate embeddings, and ranked the target candidates according to the similarity. The experiments show that this approach significant outperforms the state-of-the-art methods and improves the accuracy of morph resolution.
Subjects: Computer Science >> Computer Application Technology submitted time 2017-03-10
Abstract：近年来，一方面，信息检索在自身发展的同时不断和其他学科领域交叉融合，另一方面，新资源、新平台的出现也促进了信息检索的迅猛发展。信息检索研究呈现出个性化、协同化、社会化的趋势。本文 总结了近年来信息检索研究的一些新动向，并分析了未来发展的若干趋势。
Peer Review Status:Awaiting Review
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