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Isomorphism of extensions of C（T2）

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Science china Mathematics 2011年第2期 281-286页

作者： wei changguo 1, & wang liguang 2 1 school of mathematical sciences, ocean university of china, Qingdao {3., china 2 school of mathematical sciences, Qufu Normal university, Qufu 273.65, china

In this paper we give a certain classification theorem of extensions of the torus algebra up to isomorphism and also show that the K 0 -group K 0 (E) and the semigroup V (E) are two complete invariants of such extensi... 详细信息

关键词： extension semigroup isomorphism

PDMS prism-glass optical coupling for surface plasmon resonance sensors based on MEMS technology

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Science china(Information sciences) 2010年第10期53卷 2144-2158页

作者： GENG ZhaoXin 1,2 , LI Qing 3., wang wei 1 & LI ZhiHong 1 1 Institute of Microelectronics, Peking university, Beijing 100871,{3. 2 school of Information engineering, Minzu university of{3., Beijing 100081,{3. 3.school of sciences, Changchun university of Science and Technology, Changchun 13.000,{3. 1. Institute of Microelectronics Peking University Beijing 100871 China2. School of Information engineering Minzu University of China Beijing 100081 China3. School of Sciences Changchun University of Science and Technology Changchun 130000 China

A miniaturized surface plasmon resonance (SPR) chip has been developed for biomedical and chem-ical analysis with low cost and high performance. The techniques of bulk silicon micromachining and polymer replication were used to fabricate the Kretschmann SPR sensor composed of a Polydimethylsiloxane (PDMS) prism, a coupling glass and microchannels. The plasmon properties of thin metal films were investigated theoret-ically based on Fresnel analysis, with optical boundary conditions pertaining to the surface plasmon resonance at the gold/water and gold/air interfaces. The theoretical results show that difference in the refractive index (RI) between the PDMS prism and the coupling glass layer affect the precision of the SPR angle and the SPR curve. Meanwhile, the period of the interference fringe attaching on the SPR curve increases with an increase in wavelength and a decrease in the refractive index of the coupling glass layer. The gold thickness of 50 nm is required while employing a fixed incident wavelength of 650 nm, to achieve optimum SPR excitation conditions and the sensor sensitivity. The characteristics of this SPR sensor were evaluated in the angular interrogation mode of employing the incident wavelength of 650 nm in air and water media, respectively. The obtained SPR angles were approximately consistent with the theoretical ones.

关键词： surface plasmon resolance polymer microfluidic PDMS

Discovery of immune related factors in Fenneropenaeus chinensis by annotation of ESTs

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Progress in Natural Science:Materials International 2004年第1期14卷 48-55页

作者： SHEN Yaoqing 1,2 , XIANG Jianhai 1*, wang Bing 1,2 , LI Fuhua 1 and TONG wei 3.1. Experimental Marine Biology Laboratory, Institute of oceanology, Chinese Academy of {3., Qingdao 266071,china 2. Graduate school of the Chinese Academy of {3., Beijing 10003., china 3. Genomics & Bioinformatics Institute, Chinese Academy of {3., Beijing 1013.0, china) Chinese Acad Sci Inst Oceanol Expt Marine Biol Lab Qingdao 266071 Peoples R China Chinese Acad Sci Grad Sch Beijing 100039 Peoples R China Chinese Acad Sci Geonom & Bioinformat Inst Beijing 101300 Peoples R China

A total of 10446 expressed sequence tags (ESTs) are obtained by a large scale sequencing of a cDNA library from cephalothorax of adult Fenneropenaeus chinensis . An EST analysis platform was built up based on local computers and bioinformatic techniques were used to annotate these ESTs in order to promptly find possible functional genes, especially for immune related factors. About 4% of the ESTs show similarity to the coding sequences of such factors, including lectin, serine protease, serpin, lysozyme, etc. These ESTs provide a partial profile of the immune system in F. chinensis and useful information for further study on these genes.

关键词： Fenneropenaeus chinensis bioinformatics ESTs immune factors

Characterization for commutators of n-dimensional fractional Hardy operators

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Science china Mathematics 2007年第10期50卷 1418-1426页

作者： Zun-wei FU~(1,2) Zong-guang LIU~3.Shan-zhen LU~(1+) Hong-bin wang~3.~1 school of {3. sciences,Beijing Normal university,Beijing 100875,china ~2 Department of Mathematics,Linyi Normal university,Linyi 276005,china ~3.Department of Mathematics,china university of Mining and Technology (Beijing),Beijing 100083.china 1. school of mathematical sciences Beijing Normal University Beijing 100875 China 2. Department of Mathematics Linyi Normal University Linyi 276005 China 3. Department of Mathematics China University of Mining and Technology (Beijing) Beijing 100083 China

In this paper,it was proved that the commutator H_(β,b)generated by an n-dimensional fractional Hardy operator and a locally integrable function b is bounded from L^(p1)(R^n)to L^(p2)(R^n)if and only if b is a CMO(R^n)function,where 1/p1-1/p2=β/n,11<∞,0≤β<***, the characterization of H_(β,b)on the homogenous Herz space K_q^(α,p)(R^n)was obtained.

关键词： n-dimensional fractional Hardy operator, commutator, C(M)O function, homogeneous Herz space

Assessment of the Potential for Cross-Border Transmission of Infectious Diseases via Commercial Air Travel—Shanghai Municipality,china,2019-2023

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china CDC weekly 2024年第42期6卷 1093-1097页

作者： weimin Hao Jieyan Gu Yujue wang Li wang {3. Hou Ting wang wei Zhang Yi Zhang Na He Zhengan Tian Department of Epidemiology School of Public HealthFudan UniversityShanghaiChina Division of Health Quarantine Shanghai Customs DistrictShanghaiChina Division of Enterprise Management Shanghai Customs DistrictShanghaiChina Hongqiao Airport Customs House Shanghai Customs DistrictShanghaiChina Pudong International Airport Customs House Shanghai Customs DistrictShanghaiChina Shanghai Institute of Infectious Disease and Biosecurity Fudan UniversityShanghaiChina Shanghai International Travel Healthcare Center ShanghaiChina

What is already known about this topic?Despite the end of coronavirus disease 2019(COVID-19)as a public health emergency of international concern(PHEIC),the changes in risks of travel-related infectious diseases and their impact on global health quarantine still call for great *** is added by this report?Our study indicated that the pattern of changes in the positive detection rate of arrivals was basically in line with the disease incidence in countries from which travel was *** are the implications for public health practice?Accurate risk assessment at entry-exit ports can significantly enhance the efficiency of targeting highrisk international arrivals,especially in the early stages of epidemic control and prevention when available data are insufficient.

关键词： prevention travel diseases

Conceptual design,data model and key techniques of“3. Assistant”

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中国有色金属学会会刊：英文版 2011年第S3期21卷 692-698页

作者： LI Qing-yuan1, ZHANG Xuan2, JIN Yang2, ZHOU Hui3. wang Qian-jin3.wei Zhan-yin1 1. Key Laboratory of Geo-Informatics, Chinese Academy of Surveying and Mapping, Beijing 10083., china 2. {3. of Geo-Science and Surveying Engineering, china university of Mining and Technology, Beijing 100083. china 3. {3. of Geomatics, Liaoning Technical university, Fuxin 123.00, china [a] Key Laboratory of Geo-Informatics Chinese Academy of Surveying and Mapping Beijing 100830 China [b] school of Geo-Science and Surveying Engineering China University of Mining and Technology Beijing 100083 China [c] school of Geomatics Liaoning Technical University Fuxin 123000 China

Conceptual design, data model and key techniques of "Geo-engineer 3. assistant", an underground 3. GIS oriented to geology and mine application, were discussed. In particular, the importance of high-order smoothing triangular pieces to surface's fine expression in geological modeling was emphasized. The contour mode is the most favorite mode of the three modes about surface expression: DEM, TIN and contour. Topology in underground 3. modeling with CAGD was compared. From the view of boundary and coboundary, which is soul of IS 19107 (Geographic information spatial schema), 3. underground topology was re-examined.

关键词： 3. assistant true 3. GIS fine expression of surface contour mode 3. topology

TLR3.Ligand-Induced Accumulation of Activated Splenic Natural Killer Cells into Liver

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Cellular & Molecular Immunology 2005年第6期2卷 449-453页

作者： Jing wang~1 Jiawei Xu~1 weici Zhang~1 Haiming wei~1 Zhigang Tian~(1,2) ~1Institute of Immunology,school of Life sciences,university of Science and Technology of china,Hefei,Anhui,china ~2Institute of Immunology,school of Life sciences,university of Science and Technology of china,443.Huangshan Road,Hefei 23.027,Anhui,china. Institute of Immunology School of Life Sciences University of Science and Technology of China Hefei Anhui China.

It has been revealed that poly I：C is a potent stimulator for NK cells, which can induce NK cell rapid activation and preferential accumulation into liver. However, the process mediating the influx of NK cells remains obscure. In this study, we found that poly I：C administration increased the portion and absolute number of NK cells in liver, but largely decreased those in spleen. There were no obvious changes of these lymphocytes in other immune organs. The results from splenic adoptive transfer and splenectomy showed that the recruited spleen NK cells contributed to the accumulation of NK cells in liver, and this process was regulated by the production of chemokines and the presence of T cells. This investigation will help to understand the enhanced immune cell recruitment in liver upon viral infection. Cellular ＆ Molecular Immunology. 2005;2（6）：449-453.

关键词： liver spleen NK poly I:C recruitment

Kinetic characteristics of continuous flow polymerase chain reaction chip: A numerical investigation

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Science china(Technological sciences) 2010年第7期53卷 1967-1972页

作者： wang ShiYing1 & wang wei2,3.1 {3. of Physics, Peking university, Beijing 100871, china 2 Institute of Microelectronics, Peking university, Beijing 100871, china 3.National Key Laboratory of Science and Technology on Micro/Nano Fabrication, Beijing 100871, china 1. school of Physics Peking University Beijing 100871 China2. Institute of Microelectronics Peking University Beijing 100871 China3. National Key Laboratory of Science and Technology on Micro/Nano Fabrication Beijing 100871 China

Continuous flow PCR (polymerase chain reaction) chip holds impressive advantages compared to micro chamber PCR chip. In order to have better understanding of kinetic characteristics of continuous flow PCR chip, a comprehensive mathematical model is presented in this paper, including melting, annealing and extension phases of a typical PCR process which has the essence of a convection-diffusion-reaction system. Using this model, we can simulate the PCR process in series of reaction cycles. Numerical results show that the average sample velocity plays a significant role in affecting the amplification efficiency. Also, appropriate combination of the PCR mixture is important for high-quality DNA amplification. Giving a large initial DNA concentration range, the continuous flow PCR scheme holds excellent real-time detection ability theoretically. The present numerical model bridges the temperature distribution to the real DNA amplification, and thereby is able to successfully predict continuous flow PCR properties which are important for the chip design.

关键词： continuous flow PCR chip numerical simulation convection-diffusion-reaction system

Research on Methods of Ecological Security Assessment of the Middle and Lower Reaches of Liaohe River Based on GIS

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Chinese Journal of Population,Resources and Environment 2005年第4期3卷 20-25页

作者： wang Geng 1,2 , Nie Baochi 3. wang Lin 1 & Wu wei 1 1. {3. of Environmental and Biological Science and Technology, Dalian university of Technology, Dalian 116024, china 2. Urban and Environmental {3., Liaoning Normal university, Dalian 116029, china 3. Shenyang Buraue of Water Resources, Shenyang 110013. china. school of Environmental and Biological Science and Technology Oalian University of Technology Oalian 116024 China Urban and Environmental school Uaoning Nonnal University Oalian 116029 China Shenyang Buraue of Water Resources Shenyang 110013 China

Ecological security assessment and early warning research possess the attributes of spatiality, non-linearity and randomicity, so we must process much spatial information. Spatial analysis and data management are the advantages of GIS, which can define distribution trend and spatial relations of environmental factors, and show ecological security pattern graphically. Spatial differences of ecological security assessment based on GIS are discussed in this paper, of which the middle and lower reaches of the Liaohe River is taken as a study case. First, to work out pressure-state-response (P-S-R) assessment indicators system, and investigate in person and gather information; second, to digitize the watershed; third, to quantize and calculate by the fuzzy method; last, to construct GIS grid database, and expound spatial differences of ecological security by GIS interpolation and assembly analysis.

关键词： the middle and lower reaches of the Liaohe River ecological security assessment indicators system GIS spatial differences