Subjects: Biology >> Botany >> Applied botany submitted time 2024-05-07 Cooperative journals: 《广西植物》
Abstract： Seedling is the most important stage during the life history of plant and plays a critical role in the forest regeneration. We studied the species composition seasonal dynamics and spatial distribution of tree seedlings in the 20 hm 2 Ailaosha n forest dynamics plot . The forest dynamics plot was built in a mid mountain moist evergreen broad leaved forest in the Ailaoshan. Within the 20 hm 2 plot, we established 450 seedling quadrats of size 1 m × 1 m . We investigated the species composition, seas onal recruitment, seasonal mortality and spatial distribution of tree seedlings for four years ( from 2019 to 2022). The results were as follows: 1 We recorded a total of 2 928 seedlings of 58 species belonging to 42 genera and 26 families. There were 817 recruits of 47 species and 1 181 dead seedlings of 50 species. (2) The i mportance val u e s of tree seedlings varied among different tree species across years . Symplocos ramosissima and Machilus bombycina were t he dominant species, with importan ce values con sistently in the top 2 in four years while the importan ce value of the pioneer species Viburnum cyclindricum decline d continuously (3) W e didn't find significant differences in species richness, average species richness in a quadrat, species diversity S hannon Wiener index, Simpson index) index), abundance, recruits, recruitment rate, mortality and mortality rate of tree seedlings between different seasons. 4 The majority of species exhibited restricted distribution within the plot, wh ile only a few species di splayed a broader distribution across the plot. Topography was found to determine the distribution and diversity of tree seedlings with higher species richness, density and diversity (Shannon Wiener index and Simpson index) in the flat topography compared to the ridge and valley of the plot . T hese findings suggest that we don't find significant differences in community composition, recruitment and mortality of tree seedlings between different seasons. Topography influences the spatial distribution and diver sity of tree seedlings. The present study reveals the dynamics of recruitment and mortality of tree seedlings and provide the theoretical basis for biodiversity conservation and forest management.
Subjects: Psychology >> Developmental Psychology submitted time 2023-03-28 Cooperative journals: 《心理科学进展》
Abstract： To achieve organizational goals, Internet companies often stimulate continuous innovation of employees by cultivating a happy and joyful work environment. However, the link between playful climate and employees’ innovative behaviors is still underdeveloped, primarily focusing on theoretical analyses and lacking empirical support. Building on the prior findings of playfulness in the field of organizational management, the present study explores three important issues. Based on the theory of organizational climate and the characteristics of playfulness, study 1 develops a scale to measure team playful climate in Chinese Internet firms. Standing on the team level study 2 discusses the cross-level mechanisms underlying the relationship between playful work environment and employees’ innovation from the perspective of Conservation of Resources Theory. Based on the Componential Theory of Individual Creativity, study 3 introduces individual thinking styles and multiple identities to explore the boundary conditions that stimulate employees’ innovative behaviors. Our findings have developed the concept of team playful climate in Chinese Internet companies, enhanced playful climate theory. And the implications for practice in the context of Internet companies are discussed.
Subjects: Materials Science >> Materials Science (General) submitted time 2023-03-19 Cooperative journals: 《金属学报》
Abstract： A combined process of hot deformation with different deformation temperatures plus twostep quenching and partitioning (Q&P) treatment was applied to low carbon alloyed steel. The effect of stress (30% plastic deformation) on the start temperature of martensite transformation (Ms), volume fraction of retained austenite and mechanical properties was analyzed. It found that comparing with specimen treated by conventional two-step Q&P process, the microstructure of steel treated by combined process was finer and finer with the decreasing hot deformation temperature, and the typical curved micromorphology of martensite exists. Moreover, the Ms of specimen treated by combined process is increased with the increasing of deformation temperature. The effect of stress on the Ms can be attributed to the effect of stress on the grain boundaries of austenitic parent phase, where a large amount of dislocation induced by the stress is prior to occur so as to promote formation of martensite. However, the stability of untransformed austenite was improved by the plastic deformation when matensite transformed so as to get the more retained austenite (the highest volume fraction of retained austenite obtained by combined process of hot deformation at 750 ℃ is 17.2%). Moreover, the mechanical properties were improved by the combined process, namely, the highest hardness of specimen were obtained when hot deformation at 650 ℃ and the highest plasticity were obtained when hot deformed at 750 ℃.
Subjects: Geosciences >> Geography submitted time 2021-04-23 Cooperative journals: 《干旱区研究》
Abstract：以红砂幼苗为研究对象，测定了不同降水［降水减少30%（W-）、自然降水（W）和降水增多30%（W+）］和氮添加［N0（0 g·m-2·a-1）、N1（4.6 g·m-2·a-1）、N2（9.2 g·m-2·a-1）、N3（13.8 g·m-2·a-1）］条件下红砂幼苗叶片的脯氨酸（Pro）、叶绿素（Chl）、超氧化物歧化酶（SOD）、过氧化物酶（POD）和可溶性蛋白（SP）含量。结果表明：（1）在自然降水量（W）和降水量增加30%（W+）条件下，随施氮量的增加，红砂脯氨酸和叶绿素含量呈增加趋势，说明水分条件适宜时，水氮会发挥耦合效应促进脯氨酸和叶绿素的积累。（2）在无氮添加（N0）和低氮（N1）水平下，自然降水量（W）条件下的POD活性分别显著小于降水量减少30%（W-）条件下的值，中氮（N2）、高氮（N3）水平下则明显相反。说明在低氮水平下，降水量增加抑制POD活性的增加，而中氮和高氮添加极大地减缓这种抑制作用，促进POD活性的增强，表现了氮水间的补偿效应。（3）在自然降水量（W）条件下，随氮添加量的增加，可溶性蛋白含量先增大后减小，而降水量减少30%（W-）条件下，氮添加对可溶性蛋白含量影响不显著。说明在正常水分条件下，适量的氮素添加会促进植物体内蛋白的转化，但当施氮量达到一定临界值时，氮素含量的持续增加将会抑制可溶性蛋白的产生，而水分亏缺时施氮对可溶性蛋白的转化无显著影响。
Subjects: Linguistics and Applied Linguistics >> Linguistics and Applied Linguistics submitted time 2021-03-08
Abstract：新绛方言属于中原官话汾河片绛州小片。本文采用实验研究的方法，以基频为主要声学参数，对运城市新绛县方言单字调和双音节连读变调进行研究。实验结果表明，新绛方言单字调有3个调类，阴平、去声调为高降调41，阳平调为中升调34，上声为平调33。在双音节连读变调中，变化较为显著，前字、后字均有变调。阳平、上声、去声同为上声前字时发生合并。双音节组合调类一共有16种模式，归并后为13个。语音变调的规律性较强。在大部分情况下，阴平调型保持降调不变，调值会有些许变化。由于有古音为入声来源的词，阳平为前字多两种组合模式。变调多在阳平和上声中发生。
Peer Review Status:
Awaiting Review
Subjects: Psychology >> Management Psychology submitted time 2019-12-12
Abstract： To achieve organizational goals, Internet companies often stimulate continuous innovation of employees by cultivating a happy and joyful work environment. However, the link between playful climate and employees’ innovative behaviors is still underdeveloped, primarily focusing on theoretical analyses and lacking empirical support. Building on the prior findings of playfulness in the field of organizational management, the present study explores three important issues. Based on the theory of organizational climate and the characteristics of playfulness, study 1 develops a scale to measure team playful climate in Chinese Internet firms. Standing on the team level study 2 discusses the cross-level mechanisms underlying the relationship between playful work environment and employees’ innovation from the perspective of Conservation of Resources Theory. Based on the Componential Theory of Individual Creativity, study 3 introduces individual thinking styles and multiple identities to explore the boundary conditions that stimulate employees’ innovative behaviors. Our findings have developed the concept of team playful climate in Chinese Internet companies, enhanced playful climate theory. And the implications for practice in the context of Internet companies are discussed.
Subjects: Biology >> Zoology submitted time 2018-12-25 Cooperative journals: 《动物营养学报》
Abstract：本试验旨在研究二次制粒工艺下膨化玉米添加比例对颗粒饲料加工质量以及断奶仔猪生长性能、养分表观消化率与血清生化指标的影响。饲粮设5种膨化玉米添加比例（膨化玉米添加量占玉米添加总量的百分比），分别为0、25%、50%、75%、100%，采用二次制粒工艺进行颗粒饲料的加工。选用28日龄初始体重为（8.57±0.87） kg的断奶仔猪80头，随机分为5组，每组4个重复，每个重复4头猪，进行50 d的饲养试验，分为前期（第1～28天）、后期（第29～50天）2个阶段。结果表明：1）在颗粒饲料加工质量方面，颗粒饲料硬度、颗粒饲料耐久性指数（PDI）、淀粉糊化度随着膨化玉米添加比例的增加而增加。2）在断奶仔猪生长性能方面，前期末重、平均日增重、平均日采食量各组之间无显著差异(P>0.05)，料重比则表现为未添加组显著高于其他组(P0.05)；全期末重、平均日增重、平均日采食量、料重比各组之间无显著差异(P>0.05)。3）在断奶仔猪养分表观消化率方面，干物质与粗蛋白质表观消化率均以100%组最高，未添加组最低，且未添加组均显著低于各添加膨化玉米组(P<0.05)。4）在断奶仔猪血清生化指标方面，75%组血清总蛋白含量显著高于未添加组、50%组和100%组(P<0.05)；未添加组血清甘油三酯含量显著高于50%组、75%组和100%组(P<0.05)；100%组血清碱性磷酸酶活性显著高于未添加组(P<0.05)；50%组血清钙含量显著低于其他各组(P<0.05)。综合考虑膨化玉米添加比例对颗粒饲料硬度、断奶仔猪生长性能和加工成本的影响，建议在二次制粒工艺条件下，断奶仔猪饲粮中膨化玉米添加量为玉米添加总量的25%。
Subjects: Biology >> Zoology submitted time 2018-12-25 Cooperative journals: 《动物营养学报》
Abstract：本试验旨在研究高温热处理粉料对蛋鸡生产性能、蛋品质及鸡蛋卫生指标的影响。选取40周龄的海兰褐蛋鸡1 080只，随机分为4组，每组6个重复，每个重复45只鸡。对照组饲喂普通粉状蛋鸡料，试验组分别饲喂经70、80和90 ℃ 3种调质温度处理的粉状蛋鸡料。预试期1周，正试期12周。结果表明：1）试验组粉料的细菌总数和大肠菌群数量均显著低于对照组（P0.05）。2）各组之间第1～12周蛋鸡生产性能指标的差异不显著（P>0.05）。3）各组之间第12周蛋壳强度、蛋壳厚度、蛋形指数、蛋黄比率和哈氏单位的差异不显著（P>0.05），80 ℃高温热处理粉料组蛋黄的亮度、红度和黄度值显著高于对照组（P0.05），蛋壳表面的大肠菌群数量均小于对照组。5）试验组的肌胃、空肠和回肠相对重量小于对照组，但差异不显著（P>0.05）；随着调质温度的升高，试验组腺胃、肌胃、十二指肠、空肠和回肠的相对重量都逐渐增大，但差异不显著（P>0.05）。结果提示，高温热处理可以改善饲料和鸡蛋的卫生指标，但对蛋鸡生产性能、蛋品质和消化道指标的影响不显著。
Subjects: Biology >> Zoology submitted time 2018-12-25 Cooperative journals: 《动物营养学报》
Abstract：本试验旨在研究饲料不同加工工艺对复合微生态制剂菌种存活率和饲料颗粒质量的影响，并探索饲料加工工艺和复合微生态制剂对肉鸡生长性能和免疫功能的影响。试验选用864只1日龄白羽爱拔益加（AA）肉仔鸡，按照性别比例一致原则随机分为8组，每组6个重复，每个重复18只鸡，进行为期42 d的饲养试验。肉鸡饲粮加工采用普通调质制粒（OT）和大料高温调质低温制粒（ET）2种加工工艺，每种加工工艺按金霉素和复合微生态制剂的添加量不同设4个处理，金霉素和复合微生态制剂的添加量分别为0和0 mg/kg（0/0组）、600和0 mg/kg（600/0组）、300和200 mg/kg（300/200组）以及0和200 mg/kg（0/200组）。结果表明：1）在颗粒饲料加工质量方面，ET工艺对肉鸡饲粮中复合微生态制剂菌种存活率与饲料颗粒质量的影响效果显著优于OT工艺（P0.05）；在ET工艺条件下，0/0组肉鸡生长前期末重与平均日增重显著高于300/200组和0/200组（P0.05）。4）在肉鸡血浆生化指标方面，在同一工艺条件下，金霉素和复合微生态制剂的添加量对血浆生化指标的影响差异不显著（P>0.05）；不考虑金霉素和复合微生态制剂添加量，2种加工工艺对肉鸡血浆生化指标影响差异不显著（P>0.05）。结果提示：ET工艺与OT工艺相比显著提高了饲料中枯草芽孢杆菌、地衣芽孢杆菌和包被乳酸菌的存活率，显著提高了颗粒饲料的淀粉糊化度；ET工艺与OT工艺相比，肉鸡生长性能有所降低，饲料淀粉糊化度升高不能使生长性能有所提升；相同加工工艺条件下，金霉素和复合微生态制剂的添加量对肉鸡生长性能、免疫器官指数、肠道微生物数量以及血浆生化指标的影响差异不显著。
Subjects: Biology >> Zoology submitted time 2018-12-24 Cooperative journals: 《动物营养学报》
Abstract：本试验旨在研究不同饲料加工工艺及维生素添加量对肉仔鸡生长性能和屠宰性能的影响。试验选用480只1日龄体重接近的白羽爱拔益加肉仔鸡，随机分为4组，每组8个重复，每个重复20只鸡。对照组（A组）饲粮采用普通饲料加工工艺，配方中添加正常剂量的复合维生素[前期（1~21日龄）350 mg/kg、后期（22~42日龄）250 mg/kg]；试验组饲粮采用高效调质低温制粒工艺，减少配方中复合维生素添加量（B组：前期280 mg/kg、后期200 mg/kg；C组：前期224 mg/kg、后期160 mg/kg；D组：前期180 mg/kg、后期128 mg/kg）。试验期42 d。结果表明：试验前期，A组肉仔鸡饲料淀粉糊化度显著低于B组、C组和D组（P＜0.05）。试验后期，A组肉仔鸡饲料颗粒耐久性指数显著低于B组、C组和D组（P＜0.05）。试验前期、后期和全期（1~42日龄），各组肉仔鸡的末重、平均日增重、平均日采食量和料重比均差异不显著（P＞0.05）。各组肉仔鸡的腿重/屠宰重、胸肉重/屠宰重、心脏重/屠宰重、肝脏重/屠宰重、脾脏重/屠宰重、肌胃重/屠宰重、腺胃重/屠宰重均差异不显著（P＞0.05），各组十二指肠、空肠和回肠的长度及重量均差异不显著（P＞0.05）。由此可见，肉仔鸡饲粮采用高效调质低温制粒工艺，颗粒饲料加工质量优于普通饲料加工工艺，且饲料配方中减少维生素添加量对肉仔鸡生长性能和屠宰性能与普通饲料加工工艺无显著差异，即该工艺可节约维生素使用量。
Subjects: Biology >> Zoology submitted time 2018-12-20 Cooperative journals: 《动物营养学报》
Abstract：本试验旨在研究玉米粉碎粒度与破碎粒度对蛋鸡生产性能、蛋品质和消化器官指数的影响。对照组饲粮中玉米采用锤片粉碎机进行粉碎，筛片孔径分别为4.0和8.0 mm，试验组饲粮中玉米采用对辊式滚刀粉碎机进行破碎，碟盘间隙分别为0.3、0.7、1.1和1.5 mm。选取30周龄的海兰褐蛋鸡1 620只，随机分为6组，每组6个重复，每个重复45只鸡，进行养殖试验，试验期8周。结果表明：玉米的几何平均粒径随着粉碎机筛片孔径或碟盘间隙的增大而显著增大（P0.05）；采用对辊式滚刀粉碎机破碎后，碟盘间隙0.7 mm组（几何平均粒径1 446.30 μm）蛋鸡生产性能优于其他各组，且产蛋率显著高于筛片孔径8.0 mm组（P0.05）。结果显示，针对蛋鸡饲料，玉米采用对辊式滚刀粉碎机破碎优于锤片粉碎机粉碎，碟盘间隙0.7 mm（几何平均粒径1 446.30 μm）时，蛋鸡生产性能、蛋品质和消化器官指数最佳。
Subjects: Computer Science >> Integration Theory of Computer Science submitted time 2018-05-20 Cooperative journals: 《计算机应用研究》
Abstract： This paper shows the research on the energy efficiengy of heterogenous cellular networks in homogenous Poisson point process. Firstly, modeling the heterogenous cellular networks by using homogenous Poisson process. Secondly, deriving the expression of system’s coverage probability and achievable rata in Rayleigh channel situations, and then deducing as well as the expression of energy efficiency’s closed form. Finally, optimizing the density of micro-base station via convex-optimum method in order to maximize networks’ energy efficiency. The simulation results show that micro-base station’s density has significant effects on system’s energy efficiency. Its essence is through reasonable setting of micro-base station’s density to available help improve its efficiency.
Subjects: Medicine, Pharmacy >> Preclinical Medicine submitted time 2017-12-27 Cooperative journals: 《南方医科大学学报》
Abstract： Objective To explore the association between preoperative platelet count and the outcomes of patients with colorectal cancer (CRC). Methods This study was conducted among a cohort of 486 CRC patients, who underwent surgery in Sichuan Provincial Cancer Hospital between January, 2010 and July, 2013 and were prospectively followed up for their outcomes. The association between preoperative platelet counts and clinicopathologic factors of the patients were analyzed. Survival analysis of the patients was performed using log-rank test, and the factors affecting the patients' outcomes were analyzed by univariate and multivariate analyses using the Cox proportional hazard model. Results In this cohort, preoperative platelet count was significantly associated with the tumor site, depth of tumor invasion (T), and distant metastasis (M) (all P<0.05). Log-rank tests showed that in patients with CRC and rectal cancer, the overall postoperative survival differed significantly between high and low preoperative platelet count groups (χ2=8.813, P=0.003 and χ2=5.110, P= 0.024, respectively), but this difference was not observed in patients with colon cancer (P<0.05). Multivariate analysis indicated that CRC patients with a high preoperative platelet count had a higher risk of death compared to those with a low platelet level after adjustment for tumor site, tumor grade, TNM stage, vascular invasion, perineural invasion, and preoperative CEA level (RR=1.814, 95% CI: 1.056-3.115). In subgroup analysis, preoperative platelet count was identified as an independent prognostic factor in patients with rectal cancer (RR=2.718, 95% CI: 1.132-6.526), but not in patients with colon cancer (RR=1.396, 95%CI: 0.705-2.765). Conclusion As an independent prognostic factor in CRC patients, preoperative platelet count may serve as an important indicator for predicting the outcomes of rectal cancer, but its prognostic value for colon cancer needs further clarification.
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