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Journal of Zhejiang University-Science C(Computers and Electronics) 2011年第6期12卷 486-498页

作者： jian XU xiao-bo WU Meng-lian ZHAO Jun-yi SHEN Institute of VLSI Design Zhejiang University Hangzhou 310027 China

A low power high performance Delta-Sigma modulator for portable measurement applications is presented. To reduce power consumption while maintaining high performance, a fully feedforward architecture with a comprehensive system-level design is implemented. As a key building block, a novel power efficient current mirror operational transconductance amplifier (OTA) with a fast-settling less-error switched-capacitor common-mode feedback (SC CMFB) circuit is introduced, and the effects of both gain nonlinearity and 1/f noise of OTA are discussed. A new method to determine the voltage gain of an OTA is also proposed. The bottom terminal parasitic effect of poly-insulator-poly (PIP) capacitors is considered. About an extra 20% of capacitance is added to the total capacitance load. A power and area efficient resonator is adopted to realize a coefficient of 1/90 for 50% power and 75% area reduction compared with conventional designs. The chip is implemented in a low cost 0.35 μm complementary metal oxide semiconductor (CMOS) process. The total power consumption is 20 μW with a 1.5 V supply, and the measured dynamic range (DR) is 95 dB over a 1 kHz bandwidth. Experimental results show that a high figure-of-merit (FOM) is achieved for the designed modulator in comparison with those from the literature.

关键词： Low power High performance Power efficient OTA and resonator Delta-Sigma modulator

Time-depth conversion of transient electromagnetic method used in coal mines

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Journal of China University of Mining and Technology 2008年第4期18卷 546-550页

作者： YU Jing-cun WANG Yang-zhou LIU jian ZENG xiao-bo School of Resource and Earth Science China University of Mining ＆ Technology Xuzhou Jiangsu 221116 China

Accuracy of time-depth conversion in data processing of transient electromagnetic prospecting always affects the accu- rate positioning of water bodies in coal mines. In order to improve the accuracy of time-depth conversion, we established a mathe- matical model of time-depth conversion for a transient electromagnetic method based on the theory of "double smoke ring effect" of full space transient electromagnetic field transmission. Using a 3-layer as well as a 4-layer geo-electric model for roadway floors, we performed the time-depth conversion of theoretical curves of apparent resistance varying over time. In these curves, the depth corresponding to extreme value points is nearly the same as the depth of a geo-electric model. The position of water body deter- mined by our time-depth conversion method agrees well with the result of borehole drilling, indicating that the established time-depth conversion model can clearly improve the accuracy of spatial positioning of water bodies in coal mines.

关键词： coal mine transient electromagnetism time-depth conversion mathematical model

Meeting report of the chief editorial board meeting for World Journal of Diabetes 2021

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World Journal of Diabetes 2021年第12期12卷 1969-1978页

作者： Jin-Lei Wang Jia-Ping Yan Xiang Li Md Shahidul Islam jian-bo xiao Lu Cai Na Ma Li Ma Lian-Sheng Ma Baishideng Publishing Group Inc PleasantonCA 94566United States Department of Biochemistry School of Life SciencesUniversity of KwaZulu-Natal(Westville Campus)Durban 4000South Africa Faculty of Sciences Department of Analytical and Food ChemistryNutrition and Bromatology GroupUniversidade de VigoOurense 32004Spain Pediatric Research Institute Department of PediatricsUniversity of LouisvilleLouisvilleKY 40202United States

The 2021 online editorial board meeting of the World Journal of Diabetes(WJD)was held on November 9,***-Lei Wang,General Manager on behalf of the Baishideng Publishing Group,and Professor Islam,one of the Editors-in-Chiefs(EiCs)of the WJD,organized the *** EiCs and 18 Baishideng Publishing Group staff attended the *** meeting goal was to brief the EiCs on the journal’s performance,discuss the issues of concern of the EiCs,and gather ideas for the journal’s development in *** of November 8,the WJD had received 287 manuscripts since the year’s start,among which 122 met the criteria for *** numbers represent an increase of 117.4%for submissions and 110.3%for publications compared to those in ***,how to effectively control the academic quality of manuscripts and attract highquality original article submissions remain a *** EiCs provided feedback and suggestions centered on three topics:(1)Who should and how to control the academic quality of the manuscripts;(2)How the EiCs perform their responsibilities;and(3)The distinctive and shared responsibilities of the publisher and the EiCs.

关键词： World Journal of Diabetes Baishideng Editorial board meeting Journal development Bibliometrics Scientific literature

The Mechanism of Heating Rate on the Secondary Recrystallization Evolution in Grain Oriented Silicon Steel

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Journal of Wuhan University of Technology(Materials Science) 2025年第1期40卷 275-282页

作者： GAO Qian LI Jun WANG Xianhui CAO Laifu GONG jian LI bo Central Iron and Steel Research Institute Group Beijing 100081China Shougang Zhixin Electromagnetic Material R&D(Beijing)Co. Ltd.Beijing 101300China Beijing Shougang Co. Ltd.Qian’an 064404China

Grain-oriented silicon steels were prepared at different heating rates during high temperature annealing,in which the evolution of magnetic properties,grain orientations and precipitates were *** illustrate the Zener factor,the diameter and number density of precipitates of interrupted testing samples were statistically *** effect of precipitate ripening on the Goss texture and magnetic property was *** indicated that the trend of Zener factor was similar under different heating rates,first increasing and then decreasing,and that the precipitate maturing was greatly inhibited as the heating rate *** recrystallization was developed at the temperature of 1010℃when a heating rate of 5℃/h was used,resulting in Goss,Brass and{110}oriented grains growing abnormally and a magnetic induction intensity of ***,increasing the heating rate to 20℃/h would inhibit the development of undesirable oriented grains and obtain a sharp Goss ***,when the heating rate was extremely fast,such as 40℃/h,poor secondary recrystallization was developed with many island grains,corresponding to a decrease in magnetic induction intensity to 1.87 *** a suitable heating rate of 20℃/h,the sharpest Goss texture and the highest magnetic induction of 1.94 T with an onset secondary recrystallization temperature of 1020℃were found among the experimental variables in this *** heating rate affected the initial temperature of secondary recrystallization by controlling the maturation of precipitates,leading to the deviation and dispersion of Goss texture,thereby reducing the magnetic properties.

关键词： high temperature annealing heating rate secondary recrystallization grain oriented silicon steel

Role of 5-lipoxygenase in hippocampal neuron damage following global cerebral ischemia in rats

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Role of 5-lipoxygenase in hippocampal neuron damage followin...

含抑制弧和测试弧Petri网的建模及其行为分析

中国药理学会第十一次全国学术会议

作者： CHEN Wen-jian,LI Cheng-tan,ZHAO jian-bo,ZHANG xiao-yan,LIN xiao-xia,ZHANG Li-hui (Hangzhou Key Laboratory of Neurobiology and Department of Pharmacology,School of Basic Medicine,Hangzhou Normal University,Hangzhou 310036,China)

OBJECTIVE To determine spatio-temporal properties of 5-lipoxygenase(5-LOX) expression and the effect of zileuton, a selective 5-LOX inhibitor,on the hippocampal neuron injury following global cerebral ischemia(GCI).METHODS GCI was induced by bilateral common carotid artery occlusion combined with hypotension in rats.5-LOX expression was detected by Western blot analyses and 5-LOX localization was visualized by immunohistochemistry and double *** 5-LOX inhibitor zileuton(10,30,50 mg·kg) were orally *** The 5-LOX expression was significantly upregulated in the hippocampus 1,3 and 7 d(peaked at 3 d) after *** the hippocampal CA1 region,5-LOX protein was primarily localized in the *** 5-LOX inhibitor zileuton(30,50 mg·kg) markedly reduced hippocampal CA1 neuron damage at 3 d after ischemia. Protective effect of zileuton(30 mg·kg,7 consecutive days) is still evident 14 d after the ischemia *** 5-LOX is involved in global cerebral ischemic damage,the 5-LOX selective inhibitor zileuton possesses neuroprotective effect on neuronal damage in the rat hippocampus following GCI.

关键词： global cerebral ischemia hippocampus neuron 5-lipoxygenase zileuton

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系统仿真学报 2008年第S2期20卷 76-81,89页

作者：刘石坚乐晓波邹峥长沙理工大学计算机与通信工程学院长沙410076

由于原型Petri网在一些实际应用中不能满足设计的需要,人们在其概念上进行扩充形成了增广的Petri网。带抑制弧和带测试弧的Petri网正是其中的一种。分析总结了带测试弧Petri网的基本行为特征。针对零检测装置以及FIFO栈实例,应用测试弧... 详细信息

由于原型Petri网在一些实际应用中不能满足设计的需要,人们在其概念上进行扩充形成了增广的Petri网。带抑制弧和带测试弧的Petri网正是其中的一种。分析总结了带测试弧Petri网的基本行为特征。针对零检测装置以及FIFO栈实例,应用测试弧、抑制弧对系统进行了合理的建模与分析。

关键词：测试弧抑制弧建模零检测装置 FIFO栈

关于Petri网系统S-补相关定理的补充证明及其分析

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系统仿真学报 2008年第S2期20卷 1-5页

作者：刘石坚乐晓波邹峥长沙理工大学计算机与通信工程学院长沙410076

对于Petri网而言,冲撞代表着不安全,它是由于空间资源的缺少而引出的一种基本现象。人们寻找到避免冲撞的发生办法是为网系统添加补库所即做S-补。就Petri网系统做S-补的相关定理进行了补充性的证明及举例分析。

关键词： Petri网 S-补情态集行为等价

Plasma homocysteine and major adverse cardiac events in coronary artery disease patients with late hypoglycemia

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Plasma homocysteine and major adverse cardiac events in coro...

华北山区侧柏冠层气孔导度特征及其对环境因子的响应

第十三次全国心血管病学术会议

作者： LI Ning,DING Yue-you,MIAO Peizhi,ZHENG Hong-chao, CUI Ke-jian,HUANG bo,BAO xiao-mei,GU Shui-ming Xuhui Central Hospital,Shanghai 200031,China

Objective To evaluate a possible relationship between HCY levels and its prognostic value in coronary artery disease (CAD) patients with late hypoglycemia *** Ninety-five CAD patients with late hypoglycemia events were recruited and underwent coronary angiography and in some cases myocardial *** primary end point was the

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应用生态学报 2017年第10期28卷 3217-3226页

作者：刘文娜贾剑波余新晓贾国栋侯贵荣北京林业大学水土保持学院教育部水土保持与荒漠化防治重点实验室北京100083 中南林业科技大学林学院长沙410004

冠层气孔导度(g_s)是衡量冠层-大气界面水汽通量的重要生物学常数,研究其特征及对环境因子的响应,能为开展森林冠层水汽交换过程的机理性研究提供理论依据.于2014年利用SF-L热扩散式探针测定了侧柏的树干液流密度(J_s),同步监测光合有... 详细信息

冠层气孔导度(g_s)是衡量冠层-大气界面水汽通量的重要生物学常数,研究其特征及对环境因子的响应,能为开展森林冠层水汽交换过程的机理性研究提供理论依据.于2014年利用SF-L热扩散式探针测定了侧柏的树干液流密度(J_s),同步监测光合有效辐射(PAR)、饱和水汽压差(VPD)、气温(T)等环境因子,计算侧柏的冠层气孔导度特征并分析其对各环境因子的响应.结果表明:侧柏液流密度的日变化总体呈双峰曲线,生长季高于非生长季,且胸径越大液流密度越大;冠层气孔导度日变化与单位叶面积冠层蒸腾(E_L)趋势相近,均呈双峰曲线,生长季的冠层气孔导度和蒸腾较非生长季略高.侧柏冠层气孔导度与空气温度呈抛物线关系,在10℃左右冠层气孔导度达到峰谷;光合有效辐射以400μmol·m^(-2)·s^(-1)为界,小于该阈值两者呈正相关关系,大于该阈值则冠层气孔导度受其影响较小;与饱和水汽压差呈负对数函数关系,随饱和水汽压差增大而逐渐降低.较高的空气温度和光合有效辐射、较低的饱和水汽压差有利于侧柏形成较大的冠层气孔导度,进而促进冠层蒸腾.

关键词：冠层气孔导度液流密度侧柏光合有效辐射饱和水汽压差

SARS冠状病毒实时荧光RT-PCR定量检测

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生物化学与生物物理进展 2004年第3期31卷 249-254页

作者：陈苏红张敏丽黄坚丁雨伯晓晨王升启军事医学科学院放射医学研究所北京100850

为建立一种快速、准确、特异的SARS病毒RNA定量检测方法 ,根据复合探针荧光定量分析原理 ,对SARS病毒核酸进行实时荧光定量RT PCR检测 .借助计算机辅助 ,对SARS病毒基因靶序列以及检测引物和探针进行了优化筛选 ;利用体外转录SARS病毒RN... 详细信息

为建立一种快速、准确、特异的SARS病毒RNA定量检测方法 ,根据复合探针荧光定量分析原理 ,对SARS病毒核酸进行实时荧光定量RT PCR检测 .借助计算机辅助 ,对SARS病毒基因靶序列以及检测引物和探针进行了优化筛选 ;利用体外转录SARS病毒RNA靶序列 ,对RT PCR反应的镁离子浓度参数进行了优化 ;比较Trizol法、磁珠法、Qiagen法、煮沸法等 4种方法提取RNA的检测效果 ,建立了样本处理方法 ;通过对构建的体外转录靶序列模型的检测 ,对本方法的灵敏度、特异性、定量线性关系、精确度等进行了评价 ,并通过对4 2例临床标本的检测对本方法的检测效果进行了评估 .通过克隆SARS病毒核酸靶序列并进行体外转录 ,获得了长度约 1 2kb的体外转录RNA靶序列 ;经优化 ,荧光RT PCR反应液中的Mg2 + 浓度以 4 0mmol/L为最好 ;RNA提取方法采用磁珠法效果较好 ;本方法的检测灵敏度最低可达 5个拷贝的体外转录RNA分子 ,特异性10 0 % ,Ct 值的CV值小于 5 % .对临床确诊的 4 2份SARS病人血清和漱口水标本的检测结果表明 ,该方法的检出率为 79% ,与荧光抗体检测法的符合率为 70 % .上述结果表明 ,该方法建立的荧光定量RT PCR技术能够快速准确、特异、敏感地对SARS病毒核酸进行定量分析 ,为临床SARS冠状病毒RNA的检测提供了新的。

关键词： SARS 冠状病毒荧光RT-PCR 定量检测 RNA 非典型性肺炎