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Synthesis of Novel 1-Arylsulfonyl-4-(1′-N-2′, 3′, 4′, 6′-tetra- O-acetyl-β-D-glucopyranosyl)thiosemicarbazides

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Chinese Chemical Letters 2006年第2期17卷 153-155页

作者： Yu Xin li Zheng Ming li Wei guang zhao Wen li DONG Su Hua WANG State Key Laboratory of Elemento-Organic Chemistry Nankai University Tianjin 300071

The synthesis of novel 1-arylsulfonyl -4- （1＇-N -2＇, 3＇, 4＇, 6＇-tetra-O-acetyl-β-D-gluco- pyranosyl） thiosemicarbazides via condensation of 2, 3, 4, 6-tetra-O-acetyl-β-D-glucopyranosyl isothiocyanate with substituted phenylsulfonyl hydrazines was described. Their structures and physical properties were confirmed by ^1H NMR, ^13C NMR spectra, elemental analysis and MS.

关键词： Phenylfulfonyl hydrazine thiosemicatbazide condensation.

Combustion characteristics of Daqing oil shale and oil shale semi-cokes

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Mining Science and Technology 2009年第3期19卷 380-384页

作者： MIAO Zhen-yong WU Ouo-guang li Ping zhao Na WANG Pan-cheng MENG Xian-liang School of Chemical Engineering and Technology China University of Mining ＆ Technology Xuzhou Jiangsu 221116 China

Thermo-gravimetric-analysis(TGA) was used to analyze the combustion characteristics of an oil shale and semi-cokes prepared from *** effect of prior pyrolysis and TGA heating rate on the combustion process was *** pyrolysis affects the initial temperature of mass loss and the ignition *** ignition temperature increases as the volatile content of the sample ***/DTG curves obtained at different heating rates show that heating rate has little effect on ignition *** the peak of combustion shifts to higher temperatures as the heating rate is *** Coats-Redfern integration method was employed to find the combustion-reaction kinetic parameters for the burning of oil shale and oil shale semi-coke.

关键词： oil shale semi-coke combustion characteristics pyrolysis degree h-eating rate

DNA vaccine encoding L7/L12-P39 of Brucella abortus induces protective immunity in BALB/c mice

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Chinese Medical Journal 2006年第4期119卷 331-334页

作者： LUO De-yan li Peng XlNG li zhao guang-yu SHI Wei ZHANG Song-le WANG Xi-liang Institute of Microbioiogy and Epidemiology Academy of Military Medical Sciences Beijing 100071 China

Brucella abortus is a gram-negative, facultative, intracellular bacterium that infects both cattle and humans, causing abortion and infertility in the former and undulant fever, endocarditis, arthritis, and osteomyelitis. Resistance to Brucella depends on acquired cell-mediated immunity （CMI）. live attenuated vaccines can stimulate strong CMI response, which are usually very effective against brucellosis and are used to control brucellosis in domestic animals. However, there is no safe and effective vaccine available for human because the vaccine strains used for animals are considered too virulent for humans. A vaccine that will be noninfectious to humans but effective in stimulating a broad protective immune response is needed.

关键词： Brucella abortus DNA vaccine fusion protein

Recurrent intracranial hemangiopericytoma with multiple metastases

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Chinese Medical Journal 2006年第2期119卷 169-173页

作者： CAO Yong ZHANG Mao-zhi WANG Jun-mei ZHANG Wei li guang zhao Ji-zong Department of Neurosurgery Beijing Tiantan Hospital Capital University of Medical Sciences Beijing 100050 China

Hemangiopericytoma （HPC） is a potential malignant tumor originating from Zimmermann＇s pericytes around capillaries and postcapillary venules, which is most common in soft tissues. Being rarely encountered, intracranial HPC accounts for 2%-4% in meningeal tumors or less than 1% in all intracranial tumors. The histogenesis of this tumor has been debated as a specific aggressive variant of meningioma or angioblastic meningioma for a long time.

关键词： hemangiopericytoma neoplasm metastasis

电动汽车电机驱动系统分布参数对传导电磁干扰影响研究

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北京理工大学学报 2016年第9期36卷 935-939页

作者：翟丽张新宇李广召北京理工大学机械与车辆学院北京100081

构建了电动汽车电机驱动系统传导电磁干扰测试平台,研究电动汽车电机驱动系统带载工况下分布参数对传导电磁干扰的影响.通过测试比较电机驱动系统带载工况下和空载工况下产生的传导电磁干扰,分析系统高低频差模干扰和共模干扰的传播路径... 详细信息

构建了电动汽车电机驱动系统传导电磁干扰测试平台,研究电动汽车电机驱动系统带载工况下分布参数对传导电磁干扰的影响.通过测试比较电机驱动系统带载工况下和空载工况下产生的传导电磁干扰,分析系统高低频差模干扰和共模干扰的传播路径,建立相应的等效电路,在频域内分析了传导电磁干扰产生的机理和分布参数对传导电磁干扰的影响.测试结果表明,适当增大电机控制器内部功率器件对地分布电容和直流动力线缆对地分布电容可减小系统产生的高频传导电磁干扰.

关键词：电动汽车电机驱动系统传导电磁干扰分布参数

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广西植物的新记录

广西植物 2001年第2期21卷 99-102页

作者：李光照广西壮族自治区中国科学院广西植物研究所广西桂林541006

报道了近年发现的广西新记录植物 2 1种 ,同时还对广西金秀县特有种大齿马铃苣苔的形态特征做了补充记述。这些新记录植物的绝大多数种类系采自广西猫儿山自然保护区 ,是猫儿山植物区系的重要组成部分。

关键词：广西新记录植物标本大齿马铃巨苔

PHYSICAL PROPERTIES AND ELASTIC MODULUS OF DUT-1 MODEL ICE

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Journal of Hydrodynamics 2003年第5期15卷 98-102页

作者： li Zhi jun, li guang wei, Shen zhao wei, Wang Yong xue, Qu Yue xia State Key Laboratory of Offshore and Coastal Engineering, Dalian University of Technology, Dalian 116024, China

A new synthetic model ice, DUT-1 model ice, was developed. This paperdescribes the procedures for making the model ice and details its ingredients, grain sizedistribution, structure, density and elastic modulus. Based on its measured density, DUT-1 model icehas steady mechanical properties and is stable for sufficiently long period to perform ice modelingtests. The relationships of the measured elastic modulus with water amount and density were workedout.

关键词： synthetic model ice ingredients size gradation structure density

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高铁桥梁整体式减震榫低周疲劳寿命预测

桥梁建设 2019年第4期49卷 35-39页

作者：李照广高日孟兮北京交通大学土木建筑工程学院北京100044 北京城市学院北京101399 中冶建筑研究总院有限公司北京100088

为了解高铁桥梁整体式减震榫的疲劳性能,确定其低周疲劳寿命,提出采用临界平面法和能量法组合的方法对减震榫的低周疲劳寿命进行预测。该方法以临界平面上的塑性应变能作为减震榫的疲劳损伤参量,通过坐标变换法求得减震榫在给定榫顶水... 详细信息

为了解高铁桥梁整体式减震榫的疲劳性能,确定其低周疲劳寿命,提出采用临界平面法和能量法组合的方法对减震榫的低周疲劳寿命进行预测。该方法以临界平面上的塑性应变能作为减震榫的疲劳损伤参量,通过坐标变换法求得减震榫在给定榫顶水平位移下最大损伤平面上的塑性应变能,然后根据塑性应变能与疲劳寿命之间的幂指数函数关系进行疲劳寿命预测。通过3个减震榫试样的低周疲劳试验验证该方法的准确性。结果表明:减震榫试样的低周疲劳预测寿命与试验寿命相差很小,提出的方法能较准确地预测减震榫的低周疲劳寿命。

关键词：高速铁路桥减震榫低周疲劳疲劳寿命塑性应变能疲劳试验

Decision making module based on stochastic magnetic tunnel junctions

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Science China(Physics,Mechanics & Astronomy) 2025年第1期Mechanics & Astronomy) .卷 202-209页

作者： Yifan Miao li zhao Yajun Zhang Zhe Yuan Center for Advanced Quantum Studies and Department of Physics Beijing Normal University Institute for Nanoelectric Devices and Quantum Computing Fudan University Interdisciplinary Center for Theoretical Physics and Information Sciences Fudan University

In biological neural systems, noise is ubiquitous but does not affect the correct decisions made in the complex cognitive ***-making in biological neural system is typically achieved by accumulating input information over a period of *** by recent developments in neurosciences, we design a decision-making module based on spintronic devices, utilizing superparamagnetic tunnel junctions as artificial neurons. The feasibility of this decision-making module is verified through circuit simulations. Taking a multi-layer perceptron as an example, the module significantly improves the accuracy of the perceptron in the handwritten digit recognition task. Furthermore, the spintronic decision-making module offers advantages over the conventional pooling methods, such as adaptive decision time, high performance and the absence of analog-to-digital conversion. The decision-making module is flexible to be integrated into artificial neural networks and provides a general yet effective solution to enhance performance against device noise.

关键词： neuromorphic computing spintronics magnetic tunnel junction neural networks