Subjects: Digital Publishing >> New Media submitted time 2023-10-08 Cooperative journals: 《中国传媒科技》
Abstract：本文阐述了互联网新闻出版舆情监测系统的数据采集技术分析。
Subjects: Other Disciplines >> Synthetic discipline submitted time 2023-03-28 Cooperative journals: 《中国科学院院刊》
Abstract： China has officially established the first batch of national parks in 2021 and such construction is entering a high-speed stage. National parks of the country basically originate from existed protected areas, and face series of long-standing problems and challenges, such as over simplified administration, low community participation, and prominent contradictions between ecological conservation and social development. The Man and the Biosphere (MAB) Programme is the first flagship project of United Nations Educational, Scientific and Cultural Organization (UNESCO) for biodiversity and cultural diversity conservation, biosphere reserve is its implementation platform, which has accumulated a lot of useful experience in biodiversity conservation, sustainable development, management and governance models, and regular evaluation. This study summarizes the theories and practice of biosphere reserves related to the construction of national parks. Several suggestions are concluded for the establishment and management of national park, including strengthening the excavation, integration and utilization of cultural diversity, promoting the participation of communities, innovating governance models, establishing a mechanism for realizing the value of ecological products and brand appreciation, and formulating a comprehensive evaluation system.
Subjects: Other Disciplines >> Synthetic discipline submitted time 2023-03-28 Cooperative journals: 《中国科学院院刊》
Abstract： Germany has integrated biosphere reserves into the national strategy of sustainable development, and has built an outstanding biosphere reserve system nationwide, which has played a key role in maintaining the stability of ecosystem, exploring sustainable use of natural resources, innovating social development models, prospering local economies and providing an important platform to carry out comprehensive research on human and nature relationship. The experience of Germany includes: long and solid accumulation in the development of protected areas; deep understanding from authorities and the folk of the concept of Man and the Biosphere Programme (MAB) and the value of biosphere reserves, and more attention to their dissemination and popularization; strong support from federal and local governments in areas of politics, legislation, scientific research and international cooperation; full reflection of the demonstration value of biosphere reserves; innovative in the nomination and periodic review of biosphere reserves. Based on Germany’s experience, suggestions to China authorities include: enhancing awareness of the public about MAB and biosphere reserves; strengthening national support and promoting the creation of the “Chinese model” in the area of biosphere reserves; incorporating biosphere reserves into the legislation of protected area system underway; establishing national norms for the nomination and periodic review; strengthening international exchanges and cooperation, and jointly creating differentiated models of biosphere reserves development, so as to help pave a way for further development of MAB, and enable to establish a community of shared future for mankind.
Subjects: Other Disciplines >> Synthetic discipline submitted time 2023-03-28 Cooperative journals: 《中国科学院院刊》
Abstract： Potato is the fourth most important crop in China, and nearly 70% of its production area overlaps the contiguous, destitute regions, which made potato one of the promising crops for poverty alleviation considering its economic value, high yield, and adaptability. Therefore, transformation of advanced potato cultivation techniques in severe poverty regions is an efficient and robust strategy for precise poverty alleviation. Nevertheless, potato production in China is threatened by several critical issues, including low coverage of virus-free potato seed tubers, infestation by various pathogens, and frequent natural hazards. These obstacles mentioned above impeded the improvement of potato sector, ultimately jeopardizing the poverty reduction through potato cultivation in impoverished rural areas. With endeavors from other institutions, Institute of Microbiology, Chinese Academy of Sciences (IMCAS) put continuing efforts on optimization of virus-free seed potato production, enhancement of application technology of chemical fertilizers and pesticides, eco-friendly techniques for disease and pest management, and other related research fields in recent years, resulting in the emergence of a Green, High-efficient, Integrated Technique Cultivation (GHITC) system for potato growers and their poverty alleviation. Great achievements have been obtained by introduction of GHITC system to Guizhou, Ningxia, Inter-Mongolia and other potato-growing poverty regions. In this study, we comprehensively rule out the key issues in poverty alleviation through potato industry, systematically summarize advantages of potato GHITC system as well as its contributions to precise poverty alleviation, and speculate future investigations on standardized production, differentiated application, and systematized innovation.
Subjects: Other Disciplines >> Synthetic discipline submitted time 2023-03-28 Cooperative journals: 《中国科学院院刊》
Abstract： It has been 50 years since UNESCO’s Man and the Biosphere (MAB) Programme was launched in 1971. China joined this global inter-governmental scientific program in 1973, and the Chinese National Committee for the UNESCO’s Man and the Biosphere Programme (MAB China) was founded in 1978, with the support of Chinese Academy of Sciences (CAS) in collaboration with other ministries engaged in the administration of environmental conservation, forestry, agriculture, education, ocean and atmosphere, and so on. Since then, MAB China has carried out diverse explorations combining the value of UNESCO-MAB and the needs of the natural reserves in China. MAB has played an important role in promoting biodiversity conservation, sustainable use of natural resources, ecological civilization of China. With the approaching of 15th Conference of the Parties (COP15) to the UN Convention on Biological Diversity and the 50th anniversary of MAB, the article reviews the progress of the implementation of MAB in China, analyzes the problems and challenges, and advances proposals in regard of the rising needs of global environmental governance and construction of community of shared life by cooperation within international community.
Subjects: Medicine, Pharmacy >> Clinical Medicine submitted time 2022-07-01 Cooperative journals: 《中国全科医学》
WEI Xu
LIU Ning
ZHANG Yili
HAN Tao
SUN Kai
QI Baoyu
CHEN Xin
QIN Xiaokuan
GAO Jinghua
XIE Yanming
ZHU Liguo
Abstract：
The Patients with osteoporosis (OP) often suffer from a variety of comorbidities, including endocrine, circulatory, respiratory, urinary, immune, skeletal muscle, nerve and other multi system diseases. The incidence of OP comorbidity is high, and these comorbidities may aggravate osteoporosis and increase the risk of osteoporotic fracture, seriously affect the quality of patient's life, and make the clinical management more complex. So the situation brings a heavy burden to the families and society. At present, there is a lack of overall research on osteoporosis and its comorbidities. The existing research strategies are difficult to effectively guide clinicians to carry out comorbidity management in terms of common causes, common prevention and common treatment. In view of this, it is suggested to introduce the concept of multidisciplinary integrated treatment (MDT), and strengthen the understanding of osteoporosis related comorbidities and their pathogenesis. Patients who may be complicated with osteoporosis should be screened as early as possible. Once osteopenia and osteoporosis are found, active prevention and intervention should be carried out to reduce the risk of fracture. Early screening, early diagnosis and early treatment is necessary to realize the prevention and treatment of OP comorbidities.
Subjects: Biology >> Zoology submitted time 2018-12-25 Cooperative journals: 《动物营养学报》
Abstract：本试验旨在研究妊娠后期饲粮中添加小麦水解蛋白（HWG）对母猪繁殖性能、血清生化指标和氨基酸含量及胎盘组织营养物质转运相关基因表达的影响。试验选用3~4胎次、预产期相近的妊娠母猪33头，随机分为3组，每组11个重复，每个重复1头母猪。对照组母猪饲喂基础饲粮，试验组母猪在基础饲粮中于妊娠第90~114天期间分别添加1%和2%的HWG，所有饲粮均等能等氮。结果表明：1）与对照组相比，饲粮中添加1%HWG显著提高了仔猪平均初生活仔重（P<0.05），饲粮中添加2%HWG显著提高了仔猪初生窝重、初生活仔窝重（P<0.05）。2）与对照组相比，饲粮中添加1%和2%HWG显著提高了妊娠第107天母猪血清中天冬酰胺、组氨酸、鸟氨酸含量和脐带血清中组氨酸、异亮氨酸、亮氨酸、苯丙氨酸和酪氨酸含量（P<0.05），显著降低了母猪血清中血氨、甘氨酸含量和脐带血清中血氨含量（P<0.05）；饲粮中添加1%HWG显著提高了母猪血清中缬氨酸含量（P<0.05），饲粮中添加2%HWG显著提高了母猪血清中异亮氨酸、苏氨酸含量和脐带血清中精氨酸、谷氨酸、谷氨酰胺、甘氨酸、蛋氨酸、丝氨酸、苏氨酸、色氨酸、缬氨酸、白蛋白、葡萄糖含量及碱性磷酸酶活性（P<0.05）。3）与对照组相比，饲粮中添加1%HWG显著提高了胎盘组织中性氨基酸转运载体2（SNAT2）、谷氨酸转运载体3（EAAT3）、碱性氨基酸转运载体2（LAT2）、葡萄糖转运载体2（GLUT2）的mRNA相对表达量（P<0.05），饲粮中添加2%HWG显著提高了胎盘组织中性氨基酸转运载体1（SNAT1）、SNAT2、EAAT3、LAT2、小肽转运载体1（PepT1）、小肽转运载体2（PepT2）、葡萄糖转运载体1（GLUT1）、GLUT2、葡萄糖转运载体3（GLUT3）的mRNA相对表达量（P<0.05）。由此可见，妊娠后期饲粮中添加HWG能提高胎盘组织营养物质转运相关基因的表达，促进母体营养物质的转运效率和胎猪的生长发育，提高仔猪初生窝重。
Subjects: Biology >> Zoology submitted time 2018-12-24 Cooperative journals: 《动物营养学报》
Abstract：本试验旨在研究饲粮中添加酵母β葡聚糖对围产期奶牛生产性能、血清生化指标及抗氧化能力的影响。选择40头体况评分（3.63±0.06）、胎次（2.88±0.05）、上一泌乳期产奶量[（36.86±1.06） kg/d]及预产期[（28±1） d]相近的健康荷斯坦奶牛，采用完全随机设计分为对照组和试验组，每组20头，对照组饲喂基础饲粮，试验组饲喂在基础饲粮中添加10 g/（头·d）酵母β葡聚糖的试验饲粮。试验期49 d，其中预试期7 d，正试期42 d。结果表明：1）饲粮中添加酵母β葡聚糖显著提高了产后干物质采食量、产奶量及乳蛋白产量（P0.05）；2）饲粮中添加酵母β葡聚糖显著提高了产后血清葡萄糖含量（P0.05）；3）饲粮中添加酵母β葡聚糖显著提高了产前和产后血清谷胱甘肽过氧化物酶活性（P0.05）。综上所述，围产期饲粮中添加10 g/(头•d)酵母β葡聚糖可提高奶牛的产后干物质采食量、产奶量、乳蛋白产量，提高产后血清葡萄糖含量及血清抗氧化能力，降低产后血清非酯化脂肪酸含量。
Subjects: Computer Science >> Integration Theory of Computer Science submitted time 2018-11-29 Cooperative journals: 《计算机应用研究》
Abstract： Aiming at the security problems existing in the process of the data aggregation and transmission in crowd sensing networks, such as privacy leakage, incomplete information, data tampering. this paper proposed a data aggregation privacy protection algorithm based on distributed compressive sensing and hash function. Firstly, it used distributed compressive sensing method to sparsely observe the sensed data and remove the redundant data. Then, it utilized one-way hash function to obtain hash value of the observation data and filled the hash value with the unconstrained camouflage data into the observation data of sensory data to reach the aim of concealing the true sensor data. Finally, after extracting the camouflage data at the sink node, it obtained the hash value of the observation data again to verify the integrity of data. Simulation results show that the algorithm takes into account the privacy preserving and integrity protecting of data, and also can reduce the communication overhead greatly, which means the strong applicability and scalability in practical applications.
Subjects: Biology >> Ecology submitted time 2018-05-29 Cooperative journals: 《生态学报》
Abstract：树种选择是林下山参护育成败的关键，研究树叶凋落物对人参土壤养分、微生物群落结构组成的影响，旨在为林下山参护育选择适宜林地及农田栽参土壤改良提供科学依据和理论指导。通过盆栽试验，研究添加5.0 g色木槭Acer mono.Maxim.var.mono（A）、赤松Pinus densiflora Sieb.et Zucc.（B）、胡桃楸Juglans mandshurica Maxim.（C）、紫椴Tilia amurensis Rupr.（D）、蒙古栎Quercus mongolica Fisch.ex Ledeb.（E）树叶凋落物到土壤中，种植人参（Panax ginseng C.A.meyer）后研究土壤理化性质以及微生物群落结构的变化。结果表明：添加不同树叶处理后人参土壤性质发生改变，土壤pH值显著高于对照土壤5.91（P P P P < 0.05），而真菌Ascomycota是针叶林分解的关键微生物。进一步从不同分类水平上得到特定树叶凋落物的特异细菌和真菌。典型相关分析（CDA）表明细菌Bacteroidetes、Chloroflexi、Actinobacteria及真菌Basidiomycota、Zygomycota、Chytridiomycota及Ascomycota的位置及多样性的改变均与土壤因子SMBN、TN、AP、SOC、AK、C/N、pH有关。综上所述，添加不同树叶后不仅提高土壤微生物量碳氮、改善土壤理化性质，同时改变微生物群落结构组成，不同树叶处理土壤理化性质不同导致人参土壤微生物组成的差异，本结果对于林下参选地和农田栽参土壤微生物改良具有理论指导作用。
Subjects: Computer Science >> Integration Theory of Computer Science submitted time 2018-04-17 Cooperative journals: 《计算机应用研究》
Abstract： The prediction of the future income of highway toll has great guiding significance for the management and construction planning. However, the change of toll income is influenced by many factors. It has strong nonlinearity and complexity. The traditional prediction model cannot accurately express the development law of the toll income. In this paper, a highway toll prediction model based on gene expression programming algorithm (GEP) is established. The GEP algorithm is used to establish a complex functional relationship between current income and historical data, which accurately characterize the development rule of toll income over time. In addition, an effective correction model is proposed for the influence of toll reduction policies during holidays. Finally, this paper collects the historical data on the toll revenue of 12 companies such as shanghai-hangzhou-ningbo Expressway Co. , Ltd. Compared with traditional ARIMA and neural network prediction model, and the results fully verify the effectiveness and accuracy of the proposed algorithm.
Subjects: Biology >> Ecology Subjects: Geosciences >> Marine Sciences submitted time 2017-03-08 Cooperative journals: 《生态学报》
Abstract：2009年3月-2010年12月在烟台四十里湾海域对浮游动物群落结构及其环境因子进行了连续20个航次的综合调查，记录到浮游动物8大类共计64种（类）。浮游动物主要类群为桡足类和浮游幼虫，分别发现22种、18类，占总种（类）数34%、28%；其次为水螅水母类，发现13种，占20%；毛颚动物和栉水母类各发现1种。浮游动物的优势种为中华哲水蚤（Y=0.183）、腹针胸刺水蚤（Y=0.078）、强壮箭虫（Y=0.078）和洪氏纺锤水蚤（Y=0.026）。浮游动物的生态类型主要为温带近岸种和广布性种。四十里湾海域浮游动物群落结构的季节变化较为明显，春、夏、秋、冬四季之间群落结构有显著性差异（P3）；种类数、多样性指数中位值均在8月达到最高，分别为18种、3.20；浮游动物生物量呈现出双峰变化模型，5月份达到第1峰值（中位值870.4 mg/m3），10月份为第2峰值（中位值362.0 mg/m3）。浮游动物种类数高值区主要分布在养马岛北部海域，而丰度高值区主要分布在近岸尤其是辛安河口海域。浮游动物种类数及多样性指数与水温、化学需氧量、硅酸盐显著正相关（P< 0.01），与盐度、溶解氧、无机氮显著负相关（P< 0.01）；水温和盐度是影响浮游动物分布的主要环境因子，其次是硅酸盐、叶绿素a和化学需氧量，活性磷酸盐、溶解氧、透明度以及无机氮对浮游动物分布的影响较小。
Subjects: Physics >> Condensed Matter: Structural, Mechanical and Thermal Properties Subjects: Physics >> Condensed Matter: Electronic Structure, Electrical, Magnetic, and Optical Properties Subjects: Physics >> Interdisciplinary Physics and Related Areas of Science and Technology submitted time 2016-06-23
Abstract：Metal-intercalated iron selenides are a class of superconductors that have received much attention but less understood in comparison with their FeAs-based counterparts. Here, the controversial issues such as Fe vacancy, the real phase responsible for superconductivity and lattice stability have been addressed based on first-principles calculations. New insights on the distinct features in terms of carrier doping have been revealed.
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