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Search Results: 1 - 10 of 256343 matches for " 张森 "
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基于径向基函数网络的MH/Ni电池荷电状态预测

化工学报 , 2006,
Abstract: 电动车电池管理系统的核心任务是对电池荷电状态(SOC)进行预测.在分析了MH/Ni电池充放电反应机理的基础上,应用径向基函数(RBF)神经网络建立了预测MH/Ni电池荷电状态的模型,并且应用该模型对电池放电过程中某一状态下的荷电状态进行预测.该模型预测速度快,并且预测值与试验值吻合.人工神经网络建模技术简单直观,是预测MH/Ni电池SOC有力工具.
高激发态原子及其与辐射的相互作用

物理 , 1990,
Abstract: ?高激发态原子广泛存在于星球内部、宇宙空间、地球大气、高温等离子体以及各种气体激光器内。航天、激光、受控核聚变、同位素分离等科技事业的发展,以及可调谐激光器和高分辨率光谱技术的应用,促使原子高激发态的研究工作蓬勃开展。高激发态的原子结构,高激发态与辐射的强相互作用及其在外场中呈现的性质,成为原子分子物理学的一个重要研究内容,并在近年来取得了巨大的进展和成就。本文简述这一领域的主要研究内容和发展概况。
环介导等温扩增法检测棘颚口线虫方法的建立

- , 2016, DOI: 10.13982/j.mfst.1673-9078.2016.12.047
Abstract: 棘颚口线虫是引起人体颚口线虫病最主要的病原,其引起的病例呈世界性分布。由于其复杂的生活史,以及不同生长阶段形态的变化差异,传统的形态学鉴定方法很难鉴别。为了快速、灵敏和可靠的鉴定棘颚口线虫,本研究建立了一套检测棘颚口线虫的DNA环介导等温扩增(loop-mediated isothermal amplification,LAMP)方法。根据LAMP方法原理,针对棘颚口线虫的ITS2 rDNA设计了三套特异性引物特异性识别靶基因。进行了特异性、灵敏度、稳定性和实际样品的测试。结果表明,该方法对棘颚口线虫DNA能够特异性扩增,而比对虫体DNA均无扩增;对含有棘颚口线虫ITS2目的基因片段的质粒DNA的检测限为1 fg/μL,比传统的PCR方法灵敏度高100倍;对51批次实际样品的进行检测,LAMP方法与传统的PCR测序方法结果相符。本研究设计的LAMP检测方法适用于特异性检测棘颚口线虫。
Human gnathostomiasis is a worldwide disease that is caused primarily by the larval and immature stages of Gnathostoma spinigerum. The detection of G. spinigerum is difficult due to its complicated life cycle and morphological variety at different stages. Hence, traditional parasitological techniques are only reliable when conducted by experienced laboratory personnel. In this study, we established a loop-mediated isothermal amplification (LAMP) approach for the sensitive, rapid, and reliable detection of G. spinigerum DNA. Based on LAMP reaction, three sets of specific and sensitive primers were designed from the ITS2 rDNA of G. spinigerum. The specificity, sensitivity, and stability were assessed using actual samples. Specific amplification products were obtained with G. spinigerum DNA, while no amplification products were detected with DNA of related parasites, thus demonstrating the specificity of the assay. The detection limit of this method for plasmid DNA containing G. spinigerum gene fragments was 1 fg/μL, which indicates that the LAMP assay was 100 times more sensitive than a conventional PCR for the detection of G. spinigerum. Fifty-one samples from South East Asia and South Asia were tested using the LAMP and PCR methods. The results of the LAMP method were consistent with those by the PCR method and the LAMP method established in this study is suitable for the specific detection of G. spinigerum.
完善环境信息公开的政府传播视角
Government Communication Perspective on the Improvement of Environmental Information Disclosure


- , 2016,
Abstract: 本文认为,破解当前环境群体性事件频发的关键,在于跳出权利论和制度论的结构主义思维,转而从政府传播的视角认识当今社会信息传播格局的革命性转变及由此引发的社会变迁。基于此,本文指出,完善环境信息公开的思路,一方面是以“互联网社会”的思维重构信息公开的传播渠道、传播对象以及对传播效果的评估理念,即在传播渠道上充分考虑多种虚拟社区的交织,在传播对象上重视精英与大众的并存、在传播效果的评估理念上完成从“传受对立”向“互构共变”的转变;另一方面要进一步明确和把握信息公开的政府传播本质。
:This paper argues that the key point for solving the problem of high incidence of environmental collective events is to get out of the stereotype thinking including the Theory of Rights and the Theory of Institution,both belongs to Structural Doctrine,and to understand the social transformation resulted by the fundamental change of the overall information communication pattern. Based on it,this paper brings out two suggestions for improvement of government environmental information disclosure. Firstly, the government should reconstruct the communication channel,communication objects and evaluation ideology of communication effect with the Internet Society concept. On the communication channel,the minglement of several Virtual Community should be considered adequately. On the communication objects,the government should think highly of the coexist of the elite and the mass. And on the evaluation of communication effect,the view of senders-receivers binary opposite should be changed to the Theory of Social Mutual-Construction. Secondly,the essence of information disclosure,government communication,should be made clearer and seized more tightly
PROFESSOR PEI WENZHONG''S CONTRIBUTION TO PREHISTORIC ARCHAEOLOGY DURING THE EARLY DAYS OF ZHOUKOUDIAN EXCAVATION: IN COMMEMORATION OF THE 90 th ANNIVERSARY OF THE BIRTH OF PROFESSOR PEI WENZHONG
从周口店早期工作看裴文中先生对史前考古学的贡献──纪念裴文中先生诞辰90周年


第四纪研究 , 1994,
Abstract: Professor Pei Wenzhong (1904-1982) was a famous paleolithic archaeologist and paleontologist. He graduated from the Department of Geology of Peking University in 1927 and joined the excavation at Zhoukoudian in 1928. He had been responsible for excavation from 1929-1935. During that time, localities 1, 3, 15, 13 and the Upper Cave were being excavated under his leadership. From October of 1935 to July of 1937 he studied prehistoric archaeology with H. Breuil in Paris and got Ph. D. from the University of Paris (France) in June, 1937. Then he returned to Beijing and was in charge of affairs of the Cenozoic Research Laboratory of the Geological Survey where he continued to study stone artifacts and mammalian fossils from some localities in Zhoukoudian region up to the end of 1941. During 1928-1941 or in the early stage of the Zhoukoudian excavation, he worked hard himself and got a number of research results. This paper briefly describes Prof. Pei's main contributions to prehistoric archaeology through the reviewing of his works, in the early stage of Zhoukoudian excavation and commemorates the 90th anniversary of his birthday. He found the first skull of Sinanthropus po4inensis (Homo crectus at Zhoukoudian). The discovery of Sinanthropus pekinensis proved significant in the paleoanthropology. In the same year; he began to study and collect the cultural relics. He gathered the clearly burned and partly burned mammalian bones and antlers which were usually broken. In 1930 he found the stone artifacts from the lower cave of locality 1. From Q2 of Gezitang (Kotzetang) cave of Loc. 1 was excayated a lot of remains of fire using and many stone artifacts made of quartz and other kinds of rocks were encountered by him in 1931. Because the remains of fire using and stone artifacts were with the human fossils found archaeologists believe that locality 1 is a very significant paleolithic cultural site which revealed that the beginning of fire using by human beings had started in the early paleolithic age, instead of middle paleolithic age (Mousterian). Prof. Pei's works indicate Sinanthropus is a primitive man who knew how to make stone artifacts and used fire. He pointed out "it becomes evident therefore that in north eastern Asia at this remote ageman asrepresented by Sinanthroput, both knew the use of fire and had already mastered the technique of the manufacture of crude stone artifacts" in the first paper on the studying of stone artifacts made by Sinanthropus published in 1931. Due to the discovery of the remains of fire using and stone artifacts Prof. Pei went on the reform of the excavation method at Zhoukoudian in 1932. He abolished the previously paleontological excavation method and adopted the archaeological excavation one. Till 1934 a series of standard process and recording method in the excavation at Zhoukoudian were established under his direction. The working methods which were used in excavation at Zhoukoudian in the early stage of the 1930
水质中长效参比电极的研制
道明,
腐蚀科学与防护技术 , 1990,
Abstract: 在金属管道容器的外加电流阴极保护系统中,参比电极是重要部件之一。它是测量和控制金属在腐蚀介质中电位的比较电极。目前我国在水质中进行电化学测试常用的参比电极有甘汞电极和银-氯化银电极。市售的这些参比电极都不适用于阴极保护系统,也不能在水质中长期使用。我们以前研制的PRE-长效参比电极虽经改型后可在水质中使用,但不能在含氯水质中使用。
Study and Design of Personalize Web Mining System Based on Nature Language Understanding
基于自然语言理解的个性化Web挖掘及其系统设计

蔡霞,
计算机系统应用 , 2003,
Abstract: 本文提出了将自然语言理解技术与Web挖掘系统。并给出了面向新闻挖掘这一特定领域的Web挖掘系统,并给出了面向新闻挖掘这一特定领域的Web挖掘系统NewsMiner的应用方案以及设计实现。初步实验结果表明该方案是可行的。该方法可方便地扩展到其他专业应用领域。
弹性力学中位移的确定
,
力学与实践 , 1985,
Abstract: 用力法求解线弹性力学问题时,必将涉及位移的确定。目前,关于位移的确定尚无一般论述;作为具体问题,位移的积分则见诸于有关论著之中。铁木辛柯在文1]中仅给出了确定位移的原则考虑。本文讨论了位移的一
分子结构上的偏序关系与结构感知算法

科学通报 , 1991,
Abstract: 计算机辅助分子设计、合成设计是现代化学研究的最重要内容.要让计算机来辅助化学设计,就必须让它理解分子图形,包括图在计算机内部的表达(矩阵或关联表)及外部表达(二维图形、或线型编码)、认知特定的化学结构(如:有合成意义的子结构、环等). 本文在建立分子结构的偏序关系基础上,试图突破这个限制计算机辅助化学设计以及结构数据库发展的一大障碍.引入人工智能技术中的探试-回溯机制,破除A-A匹配算法
弹性力学力法位移边界条件提法——载荷不变分时平面问题虚应力原理的几何意义
,
力学与实践 , 1987,
Abstract: 在以力法求解弹性力学问题时,位移边界条件的处理是比较困难的。本文通过探讨载荷不变分时虚应力原理的几何意义证明了虚应力原理等价于变形协调方程与以下形式位移边界条件:在位移边界上已知边界元素ds的正应变与该元素角位移沿边界的变化率。我们很容易建立这两个几何量与应变分量的关系,从而也就很容易建立以应力分量表示的位移边界条件,同时自动地排除了位移边界条件中与应力场无关的刚体位移成份。
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