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National 2000' GPS control network of china

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Progress in Natural Science:Materials International 2007年第8期17卷 983-987页

作者： Yang Yuanxi~(1**) Tang Yingzhe~1 Chen Chuanlu~2 Wang Min~3 Zhang Peng~4 Wang Xiaorui~2 Song Lijie~5 Zhang Zusheng~6 (1.Xi'an research institute of Surveying and Mapping,Xi'an 710054,china 2.Geodetic Data Processing center,Xi'an 710054,china 3.center of Earthquake Analysis and Prediction,china Seismological Bureau,Beijing 100036,china 4.National Geomatics center of china,Beijing 100044,china 5.institute of Surveying and Mapping,Zhengzhou University of Information Engineering,Zhengzhou 450052,china 6.First Crustal Deformation Monitoring center,china Seismological Bureau,Tianjin 300180,china) Xi'' an research institute of Surveying and Mapping Xi'' an 710054 China Geodetic Data Processing center Xi'' an 710054 China center of Earthquake Analysis and Prediction China Seismological Bureau Beijing 100036 China National Geomatics center of china Beijing 100044 China institute of Surveying and Mapping Zhengzhou University of Information Engineering Zhengzhou 450052 China First Crustal Deformation Monitoring center China Seismological Bureau Tianjin 300180 China

An accurately unified national GPS network with more than 2500 stations,named"National 2000' GPS control Net- work",signed the epoch 2000.0,has been established by integrating the existing six nationwide GPS networks of china set up by differ- ent departments with different *** paper presents the characteristics of the existing GPS networks,summarizes the strategies in the integrated adjustment of the GPS network,including functional model,stochastic model as well as the adjustment principle modifi- *** modifying the adjustment strategies according to the characteristics of the existing GPS networks and under the support of the IGS stations,the accuracy of the integrated national GPS network is greatly *** datum differences among the sub networks disappear,the systematic error influences are weakened,and the effects of the outliers on the estimated coordinates and their variances are *** is shown that the average standard deviation for the horizontal component is smaller than 1.0 cm,the vertical component is smaller than 2.0 cm,and the three-dimensional (3-D) position of geocenter coordinates is smaller than 3.0 *** exterior checking ac- curacy for the 3-D position is averagely better than 1.0 cm.

关键词： GPS control network adjustment systematic errors robust estimation variance component estimation coordinate system

Plasmacytoid Dendritic Cells Act as the Most Competent Cell Type in Linking Antiviral Innate and Adaptive Immune Responses

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Cellular & Molecular Immunology 2005年第6期2卷 411-417页

作者： Zheng Zhang~1 Fu-Sheng Wang~(1,2) ~1research center of Biological Therapy,Beijing 302 Hospital,Beijing 100039,china ~2research Centre of Biological Therapy,Beijing institute of Infectious Diseases,Beijing 302 Hospital,100 Xi Si Huan Middle Road,Beijing 100039,china. research center of Biological Therapy Beijing 302 Hospital Beijing 100039 China

Appropriate in vivo control of plasmacytoid dendritic cell (pDC) recruitment and activation is a fundamentalrequirement for defense against viral *** this process,a pivotal event that influences the outcome ofviral infection is the production of high levels of type I interferon by *** particular,recent research findingsshowed that pDCs not only shape the nature of innate resistance,but are also responsible for the successfultransition from innate to adaptive immunity for viral *** addition,pDCs can differentiate into antigenpresenting cells that may regulate tolerance to a given ***,in a series of recent clinical studies,pDCs appeared to be defective in number and function in conditions of chronic viral diseases such as infected withHIV-1,HBV or ***-associated clinical antiviral therapy is also *** review describes researchfindings examining the functional and antiviral properties of in vivo pDC *** & MolecularImmunology.2005;2(6):411-417.

关键词： virus plasmacytoid dendritic cell innate immunity adaptive immunity

Quasi-static Analysis of Thrust-loaded Angular Contact Ball Bearings Part Ⅱ:Results and Discussion

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Chinese Journal of Mechanical Engineering 2012年第1期25卷 81-87页

作者： CHEN Wenhua1,2,MA Zikui1,GAO Liang1,LI Xinglin3,and PAN Jun2 1 institute of Mechanical Design,Zhejiang University,Hangzhou 310027,china 2 institute of Mechanical Design and Manufacturing,Zhejiang Sci-Tech University,Hangzhou 310018,china 3 State Testing Laboratory of Hangzhou Bearing Test & research center,Hangzhou 310022,china institute of Mechanical Design Zhejiang University Hangzhou China institute of Mechanical Design and Manufacturing Zhejiang Sci-Tech University Hangzhou China State Testing Laboratory of Hangzhou Bearing Test & research center Hangzhou China

Ball bearings are widely employed mechanical components characterized by high precision and quality,and usually play important roles in various rotary machines and *** advanced applications require a deep understanding of their various kinematic and tribological characteristics that are essential to predict the fatigue endurance,relieve the vibration and minimize the power dissipation of ball bearings in particular *** angular contact ball bearing under a specified operating condition is simulated with the quasi-static/creepage analytical model proposed in the preceding *** results demonstrate that the ball bearing is a statically determinate *** the balls spin on both inner and outer races means the ball is controlled by neither the inner nor the outer *** friction between the ball and raceway renders the inner and outer contact angles *** larger the coefficient of friction is,the larger the angle *** tangential traction perpendicular to the rolling direction due to the spin induces a gyro-like rotation of the ball with respect to the raceway even if no inertial effects are *** tangential elastic compliance of contacting surfaces gives rise to locked areas within the contact patch and transforms the sliding lines from circles into *** differential slip due to the close conformity of the ball and raceway makes the sliding and traction distributions asymmetric,which will influence the location of the spinning center of the ball with respect to the *** quasi-static/creepage model can be used to reveal the operating behaviors of ball bearings running under steady conditions and to optimize the design of ball bearings for specific applications.

关键词： ball bearing quasi-static creepage differential slip tangential elastic compliance

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温度及氨氮负荷对曝气生物滤池硝化作用的影响

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城市环境与城市生态 2004年第4期17卷 24-27页

作者：王春荣王宝贞王琳哈尔滨工业大学水污染控制研究中心哈尔滨150090

采用火山岩为载体填料的曝气生物滤池(BAF)进行实验室小试,研究供氧受限条件下,BAF的硝化反硝化运行特性及温度(10℃～30℃)和氨氮负荷变化(0.069～1.32kg/(m3·d))时对硝化作用的影响。当氨氮负荷为1.10kg/(m3·d),供氧受限时,温度从2... 详细信息

采用火山岩为载体填料的曝气生物滤池(BAF)进行实验室小试,研究供氧受限条件下,BAF的硝化反硝化运行特性及温度(10℃～30℃)和氨氮负荷变化(0.069～1.32kg/(m3·d))时对硝化作用的影响。当氨氮负荷为1.10kg/(m3·d),供氧受限时,温度从20℃升高到30℃,反应器的硝化效率仅增加10%左右,表明BAF中硝化作用主要受溶质的传递、扩散速率控制而不是受与温度有关的动力学参数控制;然而,相同负荷下,当温度控制在15℃时,硝化效率明显降低,说明20℃是一临界点。此外,20℃时随氨氮负荷的增加(从0.825kg/(m3·d)提升到1.32kg/(m3·d)),氨氮去除率略有下降,但在第3个取样口处却发现有亚硝酸盐氮累积现象,这是因为在供氧受限时,随负荷的增加,溶解氧相对短缺发生了部分硝化作用。

关键词：曝气生物滤池(BAF) 硝化/反硝化温度氨氮负荷供氧受限

总线型卫星电子系统T-时延离散PETRI网建模

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系统仿真学报 2009年第14期21卷 4528-4531页

作者：吴限德孙兆伟张世杰哈尔滨工业大学卫星技术研究所哈尔滨150080

小卫星综合电子系统是整个卫星的管理中心,能够完成参数采集,数据处理,信息提取和各种控制模式的实施等任务,综合电子系统设计方案直接决定小卫星的性能和可靠性等指标。给出小卫星基于总线的综合电子系统方案,针对以总线为核心的电子... 详细信息

小卫星综合电子系统是整个卫星的管理中心,能够完成参数采集,数据处理,信息提取和各种控制模式的实施等任务,综合电子系统设计方案直接决定小卫星的性能和可靠性等指标。给出小卫星基于总线的综合电子系统方案,针对以总线为核心的电子系统方案,建立了T-时延离散Petri网(TTDPN)模型,并对该模型进行了性能分析与评价,数学仿真结果表明,基于总线的电子系统方案能够有效满足系统实时性要求。

关键词： TTDPN 电子系统小卫星总线模型

Effect of Juglone in qinglongyi on cell cycle status and apoptosis in A-549 cells

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Effect of Juglone in qinglongyi on cell cycle status and apo...

Transverse-Mode control of VCSELs With Convex Mirror

两岸三地药理学与临床药理学术会议

作者： ZOU Xiang~(1,2) KONG Ling-sheng~(1,2) JI Yu-bin~(1,2) (1. Postdoctal Programme of institute of Materia Medica of center of research and Development on Life Sciences and Environmental Sciences, harbin University of Commerce, harbin 150076, china 2. Engineering research center of Natural Anticancer Drugs, Ministry of Education, harbin 150076, china)

Objective To explore the inhibition of juglone in Qinglongyi on A-549 cells in *** MTT assay was *** confocal scanning microscope was used to observe apoptotic morphology. Changes of cell cycle are studied by flow cytometry *** MTT assay showed that juglone had a marked growth inhibition in A-549 cells and the ICis respectively 3.4×10mol·L,1.8×10mol·Land 2.6×10mol·Lafter treatment for 24,48 and 72 h by *** Laser confocal scan- ning microscope,we can see that juglone can induce the *** cycle changes are analyzed by flow cytometry with cells at G phase significantly less than those of control and cells at G phase significantly more than those of *** It suggests that juglone could apoptosis of A-549 cells with the cell cycle arrest on G phase in distinct dose-dependent manner.

关键词： qinglongyi juglone A-549 cell cycle apoptosis

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光学学报 2003年第S1期23卷 375-376页

作者： Takeshi Uchida, Tomoyuki Miyamoto, Fumio Koyama Microsystem research center, Tokyo institute of technology, 4259 Nagatsuta, Midori-ku, Yokohama, Kanagawa, 226-8503, Japan, Microsystem research center Tokyo Institute of Technology 4259 NagatsutaMidori-ku Yokohama Kanagawa 226-8503 Japan

We propose the transverse-mode control of vertical-cavity surface-emitting lasers (VCSELs) with a convex mirror. A possibility of improvements on single-mode output power and higher-order mode suppression is presented... 详细信息

关键词： mode on in of VCSEL Transverse-Mode control of VCSELs With Convex Mirror

The expression of PHGPx in mammalian cells and its antiviral effect against coxsackievirus group B

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The expression of PHGPx in mammalian cells and its antiviral...

The Role of Brain-derived Neurotrophic Factor in Mouse Oocyte Maturation in vitro

中国细胞生物学学会2005年学术大会、青年学术研讨会

作者： ZHAO Wenran, ZHONG Xuekuan, ZHOU Lingwang Department of Cell Biology, harbin Medical University, harbin 150086 institute of Keshan Disease, Chinese research center for Endemic Disease control, harbin Medical University, harbin 150086

Background: Keshan disease, an endemic cardiomyopathy, was found to be associated with selenium(Se) deficiency. Se supplementation to individuals in the endemic areas could completely prevent the development of Keshan disease. However, because of the seasonal and annual incidence of the disease, an infectious cofactor, in addition to Se deficiency, was postulated. Coxsackieviruses have been isolated from Keshan disease tissues and are known etiologic agents of viral-induced myocarditis. Se is an essential component of the antioxidant enzyme phospholipid hydroperoxide glutathione peroxidase (PHGPx). PHGPx is a unique antioxidant enzyme in that it is able to interact directly with peroxidized phospholipids and cholesterol and protect cells from oxidative damage. Since Keshan disease is associated with both virus infection and Se deficiency and Se supplementation could prevent the occurrence of the disease, we postulate that PHGPx, an important selenoenzyme, might play a role in antiviral process. In this work, we expressed PHGPx in mammalian cells and detected its protective effect on HeLa cells against Coxsackievirus group B3m(CVB3m) infection. Methods: PHGPx cDNA was amplified from a human testis library using specific primers and cloned into expression vector pcDNA3.1/His. Expression of PHGPx was performed in COS-1 cells. The antiviral effect was studied by the treatment of HeLa cells with the recombinant PHGPx. Results and conclusion: The activity of PHGPx expressed in COS-1 cells was 5-fold higher than that in control group, and it inhibited the cytopathic effect on HeLa cells caused by CVB3m. It can be concluded that recombinant PHGPx expressed in COS-1 cells has antiviral effect against CVB3m in vitro.

关键词： CVB The expression of PHGPx in mammalian cells and its antiviral effect against coxsackievirus group B

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Journal of Huazhong University of Science and technology(Medical Sciences) 2010年第6期30卷 781-785页

作者：张玲李洁苏萍熊承良 Family Planning research institute and center of Reproductive Medicine Tongji Medical CollegeHuazhong University of Science and Technology

Brain-derived neurotrophic factor (BDNF) can promote developmental competence in mammalian oocytes during in vitro maturation (IVM),but the role of BDNF in oocyte maturation at cellular level is not still *** this study,mouse cumulus-enclosed oocytes subjected to IVM were fertilized and cultured to blastocyst *** spindle configuration and cortical granules distribution during oocyte maturation in vitro were assessed by using immunofluorescence and laser confocal *** results showed that BDNF contributed to the complete preimplantation development of mouse oocytes compared to the control oocytes (13.78% vs.5.92%;Pcenters was greater than that in the control,and the percentages of oocytes showed spindles positioned near the oolemma and a well-formed cortical granule-free domain were significantly higher than that of the *** morphological characteristics of the BDNF-treated oocytes were much closer to the oocytes matured in vivo than those of the control *** conclusion,BDNF can promote the developmental competence of mouse IVM oocytes,by improving the meiotic spindle configuration and location and cortical granules distribution at meiosis Ⅰ.

关键词： brain-derived neurotrophic factor oocyte in vitro maturation meiotic spindle cortical granule