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Search Results: 1 - 10 of 104237 matches for " XinYue Zhang "
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Structure, Evolution and Hot Spots of Cooperation Innovation Knowledge Network  [PDF]
Xinyue Zhang, Wei Song
Open Journal of Applied Sciences (OJAppS) , 2015, DOI: 10.4236/ojapps.2015.54013
Abstract: Based on the statistics analysis of cooperation innovation articles, the paper analyses the distributing characteristics of cooperation innovation research papers. The distribution, structure and evolution of cooperation innovation research are studied through the social network and co-word method, combined with the information visualization technology. This study is based on the papers in the SSCI database during 2000-2014. The analysis and statistics of papers reveal distribution characteristics of the subject, time, institutions, countries and areas. The statistics shows that the research perspective of cooperation innovation from business and economics. The time distribution presents that research of cooperation innovation attracts enormous attention and the research achievement is increasing. From the distribution of organizations, countries and areas, North America and Europe countries maintain the leading position in this research field. But institutions and universities of China and other Asian countries or areas are witnessed their outstanding achievements in cooperation innovation research. Combining the co-word network analysis method, the paper studies the structure and content of cooperation innovation knowledge network in five stages and makes the net spectrum, visually showing the hot spots at various periods. The top highly cited papers in all five stages are reviewed simultaneously; their research hot spots and evolution process are concluded. The study shows 11 subjects including strategic alliances, social networks, R&D cooperation, R&D, technology transfer, alliances, knowledge management, social capital, entrepreneurship, trust, biotechnology are always the central issues in last 15 years. The focus of research is from the relationship between alliance and technology innovation to networking and knowledge innovation and then to open innovation.
An Alternating Direction Nonmonotone Approximate Newton Algorithm for Inverse Problems  [PDF]
Zhuhan Zhang, Zhensheng Yu, Xinyue Gan
Journal of Applied Mathematics and Physics (JAMP) , 2016, DOI: 10.4236/jamp.2016.411206
Abstract: In this paper, an alternating direction nonmonotone approximate Newton algorithm (ADNAN) based on nonmonotone line search is developed for solving inverse problems. It is shown that ADNAN converges to a solution of the inverse problems and numerical results provide the effectiveness of the proposed algorithm.
Research on Light Response Curve Fitting Model of Four Chamaenerion Plants on the Serzilla Mountains  [PDF]
Lusheng Wan, Zhen Xing, Xinyue Chang, Jiang Liu, Guorong Zhang
American Journal of Plant Sciences (AJPS) , 2018, DOI: 10.4236/ajps.2018.98118
Abstract: In order to study the applicability of different light response models to the photoresponse curves of four species of Chamaenerion, four species of Chamaenerion collected from Serzilla were used as test materials. Four common photosynthetic models were used to fit the photosynthetic response curve of the leaves. The results show that: 1) The effect of different photosynthetic response models on photosynthetic response curve of the genus chromasia was different. The fitted value of the correction model of right angled hyperbola was closest to the measured value, the R2 was 0.998, and RE was 0.216. 2) In terms of fitting the photosynthetic parameters, the initial quantum efficiency, light compensation point and dark respiration rate were suitable for fitting with non-right angle hyperbolic model. In terms of fitting the photosynthetic parameters, the initial quantum efficiency, light compensation point and dark respiration rate were suitable for fitting with non-right angle hyperbolic model. 3) The photosynthetic characteristics of C. angustifolium
An Improved HITS Algorithm Based on Page-query Similarity and Page Popularity
Xinyue Liu,Hongfei Lin,Cong Zhang
Journal of Computers , 2012, DOI: 10.4304/jcp.7.1.130-134
Abstract: The HITS algorithm is a very popular and effective algorithm to rank web documents based on the link information among a set of web pages. However, it assigns every link with the same weight. This assumption results in topic drift. In this paper, we firstly define the generalized similarity between a query and a page, and the popularity of a web page. Then we propose a weighted HITS algorithm which differentiates the importance of links with the query-page similarities and the popularity of web pages. Experimental results indicate that the improved HITS algorithm can find more relevant pages than HITS and improve the relevance by 30%-50%. Furthermore, it can avoid the problem of topic drift and enhance the quality of web search effectively.
An Attractive Force Model for Weighting Links in Query-Dependant Web Page Ranking
Xinyue Liu,Hongfei Lin,Liguo Zhang
Journal of Computers , 2012, DOI: 10.4304/jcp.7.1.124-129
Abstract: Link weighting is crucial for performance of link-based web page ranking algorithms. Typically, a link is viewed as recommendation between pages, which is an unquantifiable term and existing approaches lack physical interpretations. In this paper, we view a link as the attractive force between pages, and map concepts of web (in/out degree, content similarity, etc.) to those of physics (mass, distance, attractive force). Inspired by Reilly’s Law of Retail Gravitation, we propose a gravitation-like model for calculating the attractive force. We then implement a instance of our algorithm framework by taking some features of web pages into consideration. Experimental results show that this instance outperforms other typical algorithms (HITS, Randomized-HITS, and SALSA) with higher precision, better resistibility of TKC effect and no need of filtering intra-domain links.
Li/LiFePO4 battery performance with a guanidinium-based ionic liquid as the electrolyte
XinYue Zhang,ShaoHua Fang,ZhengXi Zhang,Li Yang
Chinese Science Bulletin , 2011, DOI: 10.1007/s11434-011-4655-0
Abstract: A new guanidinium-based ionic liquid (IL) was investigated as a novel electrolyte for a lithium rechargeable battery. The viscosity, conductivity, lithium redox behavior, and charge-discharge characteristics of the lithium rechargeable batteries were investigated for the IL electrolyte with 0.3 mol kg 1 lithium bis(trifluoromethanesulfonyl)imide (LiTFSI) salt. Li/LiFePO4 cells incorporating the IL electrolyte without additives showed good cycle properties at a charge-discharge current rate of 0.1 C, and exhibited good rate capabilities in the presence of a mass fraction of 10% vinylene carbonate or gamma-butyrolactone.
Characterization of sequence elements from Malvastrum yellow vein betasatellite regulating promoter activity and DNA replication
Zhang Jie,Zhang Xinyue,Wang Yaqin,Hou Huwei
Virology Journal , 2012, DOI: 10.1186/1743-422x-9-234
Abstract: Background Many monopartite begomoviruses are associated with betasatellites, but only several promoters from which were isolated and studied. In this study, the βC1 promoter from Malvastrum yellow vein betasatellite (MYVB) was characterized and important sequence elements were identified to modulate promoter activity and replication of MYVB. Results A 991 nucleotide (nt) fragment upstream of the translation start site of the βC1 open reading frame of MYVB and a series of deletions within this fragment were constructed and fused to the β-glucuronidase (GUS) and green fluorescent protein (GFP) reporter genes, respectively. Agrobacterium-mediated transient expression assays showed that the 991 nt fragment was functional and that a 28 nt region (between 390 nt and 418 nt), which includes a 5′UTR Py-rich stretch motif, was important for promoter activity. Replication assays using Nicotiana benthamiana leaf discs and whole plants showed that deletion of the 5′UTR Py-rich stretch impaired viral satellite replication in the presence of the helper virus. Transgenic assays demonstrated that the 991 nt fragment conferred a constitutive expression pattern in transgenic tobacco plants and that a 214 nt fragment at the 3'-end of this sequence was sufficient to drive this expression pattern. Conclusion Our results showed that the βC1 promoter of MYVB displayed a constitutive expression pattern and a 5′UTR Py-rich stretch motif regulated both βC1 promoter activity and MYVB replication.
Comparison of Seasonal Soil Microbial Process in Snow-Covered Temperate Ecosystems of Northern China
Xinyue Zhang, Wei Wang, Weile Chen, Naili Zhang, Hui Zeng
PLOS ONE , 2014, DOI: 10.1371/journal.pone.0092985
Abstract: More than half of the earth's terrestrial surface currently experiences seasonal snow cover and soil frost. Winter compositional and functional investigations in soil microbial community are frequently conducted in alpine tundra and boreal forest ecosystems. However, little information on winter microbial biogeochemistry is known from seasonally snow-covered temperate ecosystems. As decomposer microbes may differ in their ability/strategy to efficiently use soil organic carbon (SOC) within different phases of the year, understanding seasonal microbial process will increase our knowledge of biogeochemical cycling from the aspect of decomposition rates and corresponding nutrient dynamics. In this study, we measured soil microbial biomass, community composition and potential SOC mineralization rates in winter and summer, from six temperate ecosystems in northern China. Our results showed a clear pattern of increased microbial biomass C to nitrogen (N) ratio in most winter soils. Concurrently, a shift in soil microbial community composition occurred with higher fungal to bacterial biomass ratio and gram negative (G-) to gram positive (G+) bacterial biomass ratio in winter than in summer. Furthermore, potential SOC mineralization rate was higher in winter than in summer. Our study demonstrated a distinct transition of microbial community structure and function from winter to summer in temperate snow-covered ecosystems. Microbial N immobilization in winter may not be the major contributor for plant growth in the following spring.
Policy on Water Loss Control in China  [PDF]
Xinyue Liu, Shihu Shu
Journal of Geoscience and Environment Protection (GEP) , 2018, DOI: 10.4236/gep.2018.63009
Abstract:
The Chinese government has raised great attention on water resources and environment over the past several years. In dealing with the issues of water pollution, water management, and the imbalance of water resources, China’s state council released “Water Pollution Prevention and Control Action Plan” in 2015. This policy has become a guideline to promote water sustainability in the long run. Since then, a number of regulatory policies were released to increase the focus on water conservation. Among those actions, water loss control associated with distribution systems is regarded as a key solution to improve water supply efficiency. This paper provided a comprehensive introduction to the framework of water loss control policy in China.
Imaging of Fluoride Ion in Living Cells and Tissues with a Two-Photon Ratiometric Fluorescence Probe
Xinyue Zhu,Jianxi Wang,Jianjian Zhang,Zhenjie Chen,Haixia Zhang,Xiaoyu Zhang
Sensors , 2015, DOI: 10.3390/s150101611
Abstract: A reaction-based two-photon (TP) ratiometric fluorescence probe Z2 has been developed and successfully applied to detect and image fluoride ion in living cells and tissues. The Z2 probe was designed designed to utilize an ICT mechanism between n-butylnaphthalimide as a fluorophore and tert-butyldiphenylsilane (TBDPS) as a response group. Upon addition of fluoride ion, the Si-O bond in the Z2 would be cleaved, and then a stronger electron-donating group was released. The fluorescent changes at 450 and 540 nm, respectively, made it possible to achieve ratiometric fluorescence detection. The results indicated that the Z2 could ratiometrically detect and image fluoride ion in living cells and tissues in a depth of 250 μm by two-photon microscopy (TPM).
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