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Relationship between HBV viremia level of pregnant women and intrauterine infection:neated PCR for detection of HBV DNA

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World Journal of Gastroenterology 1998年第1期4卷 66-68页

作者： zhang shu-lin HAN Xiao-Bing YUE Ya-Fei 不详

IM To determine the incidence of hepatitis B virus (HBV) intrauterine infection and to explore the relationship between HBV viremia level of pregnant women and HBV intrauterine infection.METHODS Sixtynine pregnant women were divided into three groups. Group A, 41 HBsAg positive patients, 14 of them were HBeAg positive (group A1), and 27 HBeAg negative (group A2); Group B, 12 HBsAg negative patients, but positive for antiHBs and/or antiHBe and/or antiHBc; and Group C, 16 patients negative for all HBV markers. Blood samples of mothers were taken at delivery, samples of their infants were collected within 24 hours after birth (before injection of HBIG and HBV vaccine). All the serum samples were stored at -20℃. HBV serum markers were tested by radioimmunoassay and HBV NDA were detected by nested polymerase chain reaction.RESULTS In group C, all of 16 newborns were negative for HBsAg and HBV DNA. In group A, 7 infants were HBsAg positive (171%), and 17 (415%) were HBV DNA positive (P<005). The incidence of intrauterine HBV infection was much higher in group A1 than that in group A2 (HBsAg 429% vs 37%, HBV DNA 929% vs 148%, P<005). The incidence of HBV intrauterine infection was significantly different between high and low HBV viremia of mothers (933% vs 429%, P<005).CONCLUSION The incidence of HBV intrauterine infection is high when HBV DNA in newborns detected with nested PCR is used as a marker of HBV infection. It is related to HBV viremia level of mothers.

关键词： hepatitis B DNA,viral/analysis radioimmunoassay polymerase chain reaction intrauterine infection

基于掺杂的染料敏化电池光阳极性能的研究进展

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现代化工 2024年第S01期44卷 87-94页

作者：王锐朵永超张曙林牛家嵘金欣王闻宇天津工业大学纺织科学与工程学院天津300387 天津工业大学材料科学与工程学院天津300387

纳米TiO_(2)半导体材料具有较高的禁带宽度和良好的耐光腐蚀性,被认为是最具有发展潜力的太阳能电池的光阳极材料,但二氧化钛存在禁带宽度大且激发波长短、光生电子容易复合等问题,在很大程度上阻碍了人们对提高染料敏化太阳能电池光电... 详细信息

纳米TiO_(2)半导体材料具有较高的禁带宽度和良好的耐光腐蚀性,被认为是最具有发展潜力的太阳能电池的光阳极材料,但二氧化钛存在禁带宽度大且激发波长短、光生电子容易复合等问题,在很大程度上阻碍了人们对提高染料敏化太阳能电池光电效率的研究。适当的金属和非金属掺杂剂可改善二氧化钛的内部结构,引入杂质能级和缺陷位置或替代晶格阵点上的氧原子,导致材料的表面结构和电子态发生变化,进一步促进了光生电子和空穴的分离,抑制了它们的复合,从而拓宽了可见光谱的响应范围并提高了光电性能。从掺杂剂种类入手,分别从金属掺杂、非金属掺杂和金属非金属共掺杂3个方面对掺杂机理进行梳理总结,并对未来研究方向进行展望。

关键词：染料敏化太阳能电池光阳极掺杂光电性能二氧化钛

Experiments of flow and heat transfer performances for air-cooling laminated turbine vane

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航空动力学报 2014年第5期29卷 1008-1013页

作者： WU Xiang-yu TAO Zhi DU Zhi-neng zhang shu-lin YOU Hong-de National Key Laboratory of Science and Technology on Aero-Engine Aero-thermodynamics School of Energy and Power Engineering Beijing University of Aeronautics and Astronautics Beijing 100191 China Shenyang Engine Design and Research Institute Aviation Industry Corporation of China Shenyang 110015 China

Flow resistance and heat transfer coefficients of typical double wall laminated film cooling configuration within a turbine vane were experimentally *** specimen was in large scale,and made of transparent organic *** configuration consisted of double wall laminates,pin-fins,staggered arrays of impingement and film *** number ratio of impingement holes,pin-fins and film holes was2∶1∶*** experiment vanes were installed in static cascade,and experiments were carried out under constant heat *** of internal cooling air in the experiment was from 104 to 2×105,and Re of external fluid was from 105 to 3×*** experiment results show that flow resistances of front channel and back channel of the vane are in the same level,and both of them decrease as Re of cooling air *** front channel is slightly higher than that of back *** of them increase as Re of cooling air *** experiment results were obtained from experiment vanes were compared with that obtained from laminated flat plates,and the tendency of the results agrees well.

关键词：层板涡轮叶片流动性能传热静叶栅

Synthesis of Nano-crystalline Diamond Films

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Chinese Physics Letters 2000年第5期17卷 376-378页

作者： zhang Fan zhang Yu-Feng GAO Qiao-Jun zhang shu-lin lin Ting PENG Xiao-Fu lin Zeng-Dong Department of Physics Peking UniversityBeijing 100871 Department of Physics National University of SingaporeSingapore 119260 Beijing Institute of Powder Metallurgy Beijing 100078

We have deposited nano-crystalline diamond films in a routine hot filament chemical vapor deposition system,using CH_(4)/H_(2) gas *** used various measurements such as Reid emission scanning electron microscopy,micro-Raman spectroscopy,x-ray photoelectron spectroscopy,and transmission electron microscopy for *** result show that the films consist of a crystalline diamond phase with small grain sizes ranging from 20 to 100nm.

关键词： crystalline sizes films

2011-2023年南阳市临床检测呼吸道病原体流行趋势及新冠疫情防控的影响

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中华医院感染学杂志 2024年第11期34卷 1672-1678页

作者：汪海霞张学东张舒林冯扬帆赵莹莹杜伟鹏陈锐鑫王菲南阳市中心医院医学检验科河南南阳473000 郑州久和医学检验实验室有限公司河南郑州450016 上海交通大学医学院上海200025 南阳市传染病医院医学检验科河南南阳473000

目的分析本地区临床常见呼吸道病原体流行变迁及新冠疫情对呼吸道病原体流行变迁的影响.方法收集2011年1月-2023年6月111029例发热患者和南阳市结核病防治所2011-2021年结核病监测数据65651例患者数据,采用回顾性分析,从时间维度和年龄... 详细信息

目的分析本地区临床常见呼吸道病原体流行变迁及新冠疫情对呼吸道病原体流行变迁的影响.方法收集2011年1月-2023年6月111029例发热患者和南阳市结核病防治所2011-2021年结核病监测数据65651例患者数据,采用回顾性分析,从时间维度和年龄分布动态分析各呼吸道病原体和结核分枝杆菌(MTB)的流行变迁、新冠疫情前后的流行改变和患者年龄分布特征.结果临床送检呼吸道病原体检测标本量集中在每年5-8月和12月前后,肺炎支原体(MP)常年流行,腺病毒(ADV)和呼吸道合胞病毒(RSV)大流行发生于2012-2014年间,乙型流感病毒(IBV)和副流感病毒(HPIVs)交叉或同时段流行;呼吸道病原体流行趋势在疫情前后均发生显著变化且具有各自流行特征,MP感染阳性率在疫情前、中、后期分别为16.72%、27.11%、18.23%,阳性构成比分别为60.61%、90.83%、90.19%;MP合并IBV感染阳性率由疫情前7.75%降至疫情后期0.03%,IBV感染阳性率在疫情前、中、后期分别为4.21%、0.54%、0.31%,HPIVs感染阳性率在疫情前、中、后期分别为1.94%、1.50%、0.52%,ADV和RSV感染阳性率分别由疫情前的3.11%和1.38%改变为疫情后期的0.28%和2.37%;MTB感染随患者年龄增加患病率随之升高,但75岁以上人群患病率降至6.98%,以55~64岁年龄段感染患者最多;在MTB感染患者数量逐年下降的情况下,实验室检测出现涂阳患者逐渐上升的趋势.结论呼吸道病原体感染患者年龄分布和流行变迁各具特征,新冠疫情及防控措施改变了呼吸道病原体流行趋势,以期为呼吸道病原体有效防控措施的制定提供参考.

关键词：呼吸道病原体流行病学南阳市新冠病毒新型冠状病毒感染疫情年龄分布结核分枝杆菌

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Distribution of Rice Grains on Panicle Axis and Its Relationship with Seed-Setting Ability in Liaoning, China

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Agricultural Sciences in China 2006年第3期5卷 202-208页

作者： XU Zheng-jin CHEN Wen-fu shuN Zhan-hui zhang shu-lin LIU Li-xia ZHOU shu-qing Key Laboratory of Crop Physiology Ecology Genetics and Breeding Ministry of Agriculture/Key Laboratory of Northern Japonica Rice Breeding of Liaoning Province/Rice Institute Shenyang Agricultural University Shenyang 110161 P.R.China

Studies were conducted with rice varieties developed in recent years in Liaoning Province of China as test materials. Results showed that the varieties tested could be divided into three types：（1） the high-yielding （HYV）, （2） the mediumyielding （MYV）, and （3） the low-yielding （LYV）. The panicle population was in the order of HYV〈 MYV 〈 LYV, while the grain number per panicle and seed-setting rate were just opposite. There was no significant difference in the 1 000-grain weight. Biomass was higher in HYV than in MYV and LYV, while the harvest index was higher in HYV and MYV than in LYV. Yield was inversely correlated with panicle population, but positively correlated with the grain number per panicle, seed-setting rate, the number of primary and secondary branch grains, seed density and harvest index. Yield was most closely linked with the grain number per panicle which was determined chiefly by the number of secondary branch grains and to a lesser degree by seed density and the number of primary branch grains. The seed-setting rate of the secondary branches was positively correlated with that of the whole panicle and yield. The peak value of primary branches for HYV, MYV and LYV was 12-14, 10-13 and 8-12, respectively. LYV had fewer secondary branch grains, while MYV and HYV had more. Such grains distributed mainly in the middle and lower parts of panicle axis for LYV and in the middle and upper parts for MYV and HYV.

关键词： rice grain distribution primary branch secondary branch seed-setting ability

Host susceptibility to persistent hepatitis B virus infection

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World Journal of Gastroenterology 2006年第30期12卷 4788-4793页

作者： Ying-Li He Ying-Ren Zhao shu-lin zhang shu-Mei lin Department of Infectious Diseases the First Hospital of Xi'an Jiaotong University Xi'an 710061 Shaanxi Province China

Genetic epidemiology researches such as twin studies, family-clustering of hepatitis B virus （HBV） infection studies and ethnic difference studies have provided the evidence that host genetic factors play an important role in determining the outcome of HBV infection. The opening questions include which human genes are important in infection and how to find them. Though a number of studies have sought genetic associations between HBV infection/persistence and gene polymorphisms, the candidate gene-based approach is clearly inadequate to fully explain the genetic basis of the disease. With the advent of new genetic markers and automated genotyping, genetic mapping can be conducted extremely rapid. This approach has been successful in some infectious diseases. linkage analysis can find host genes susceptible to HBV and is of great clinical importance.

关键词： Hepatitis B virus Susceptibility Association study linkage study

基于大数据的数字化系统一体化调度信息集成模型

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自动化技术与应用 2024年第1期43卷 117-120页

作者：李志宏张书林周鸿喜李扬陈亮国家电网有限公司信息通信分公司北京100761

由于已有集成模型分类过滤能力较差,因此提出一种基于大数据的数字化系统一体化调度信息集成模型。通过小波多窗谱特征提取数字化系统一体化调度信息并进行预处理。在二维空间中对最近邻点进行模糊搜索,获取数字化系统一体化调度信息模... 详细信息

由于已有集成模型分类过滤能力较差,因此提出一种基于大数据的数字化系统一体化调度信息集成模型。通过小波多窗谱特征提取数字化系统一体化调度信息并进行预处理。在二维空间中对最近邻点进行模糊搜索,获取数字化系统一体化调度信息模糊聚类中心,对信息聚类目标函数进行优化,完成调度信息分类过滤。结合大数据技术对调度信息结构层次进行分析,构建调度信息集成模型。实验结果表明,所提模型不仅能够提升调度信息分类过滤能力,同时还能够加强集成效率和容错性。

关键词：大数据数字化系统一体化调度信息集成模型

Aerodynamic/stealth design of S-duct inlet based on discrete adjoint method

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Applied Mathematics and Mechanics(English Edition) 2024年第4期45卷 725-746页

作者： Jun DENG Ke ZHAO lin ZHOU Wei zhang Bowen shu Jiangtao HUANG Zhenghong GAO School of Aeronautics Northwestern Polytechnical UniversityXi’an 710072China Aerospace Technology Institute of China Aerodynamic Research and Development CenterMianyang 621000Sichuan ProvinceChina

It is a major challenge for the airframe-inlet design of modern combat aircrafts,as the flow and electromagnetic wave propagation in the inlet of stealth aircraft are very *** this study,an aerodynamic/stealth optimization design method for an S-duct inlet is *** upwind scheme is introduced to the aerodynamic adjoint equation to resolve the shock wave and flow *** multilevel fast multipole algorithm(MLFMA)is utilized for the stealth adjoint equation.A dorsal S-duct inlet of flying wing layout is optimized to improve the aerodynamic and stealth *** the aerodynamic and stealth characteristics of the inlet are effectively ***,the optimization results are analyzed,and it shows that the main contradiction between aerodynamic characteristics and stealth characteristics is the centerline and crosssectional *** S-duct is smoothed,and the cross-sectional area is increased to improve the aerodynamic characteristics,while it is completely opposite for the stealth *** radar cross section(RCS)is reduced by phase cancelation for low frequency *** method is suitable for the aerodynamic/stealth design of the aircraft airframe-inlet system.

关键词： S-duct inlet aerodynamic/stealth optimization design discrete adjoint upwind scheme multilevel fast multipole algorithm(MLFMA)