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Search Results: 1 - 10 of 4046 matches for " 莘婧 "
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凝胶渗透色谱-固相萃取-高效液相色谱法测定花生中的吡唑醚菌酯残留
吴迪,,潘洪吉,金红云,张希跃,罗雪婷,范丽佳
农药学学报 , 2012,
Abstract: 对吡唑醚菌酯在花生仁和花生壳中的残留分析方法进行了探讨。样品采用乙腈提取、凝胶渗透色谱(gpc)结合固相萃取-氨基(spe-nh2)小柱净化,高效液相色谱-紫外检测器(hplc-uv)检测。结果表明:在花生仁及壳中分别添加吡唑醚菌酯标准品0.05、0.5和1mg/kg时,其平均回收率分别为101.7%、86.5%和83.2%和98.1%、93.8%和85.3%,相对标准偏差分别为4.3%~8.1%和4.2%~6.0%。花生仁及壳中的最低检测浓度(loq)均为0.05mg/kg。
大搞千米钻运动 力争地质勘探高速度 高举总路?大跃进的?旗,为勘探更多更好的冶金?源而奋斗!――?莘哉副司长在228队全国冶金系统探矿工程现场会?上的报告(摘要)

地质与勘探 , 1960,
Abstract: 在党的社会主义建设总路线的光辉照耀下,在各级党委的正确领导下,特别是在党的八届八中全会,反右倾、鼓干劲,厉行增产节约的伟大号召的鼓舞下,冶金系统地质勘探部门全体职工,干劲冲天,斗志昂扬,开展了轰轰烈烈的以高产、优质、低成本为中心内容的增产节约群众运动,胜利的完成了1959年地质勘探任务,实现了59年继续全面的大跃进,各方面取得了优异的成绩。?探工程量比大跃进的53年增长21%;坑探增长11%;其它工程也相应增长。工程效率、质量大大提高,?探台月效率予计可达250米,比
反平面断裂问题的无单元伽辽金比例边界法 An element-free Galerkin scaled boundary method for anti-plane crack problem
An element-free Galerkin scaled boundary method for anti-plane crack problem

,王娟
- , 2017, DOI: 10.7511/jslx201701007
Abstract: 将比例边界法与单元伽辽金法相结合,建立了反平面断裂分析的单元伽辽金比例边界法。这是一种边界型网格法,在环向方向上采用单元伽辽金法进行离散,因此计算时仅需要边界上的节点信息,不需要边界元所要求的基本解。为了便于施加本质边界条件,通过建立节点值和虚拟节点值之间的关系给出了修正的移动最小二乘形函数。在径向方向上,该方法利用解析的方法求解,因此是一种半解析的数值方法。最后,给出了数值算例,并验证了所提方法后处理简单和计算精度高的特点,适合于求解反平面断裂问题。
Through incorporation of the element free Galerkin method into the scaled boundary method,an element-free Galerkin scaled boundary method (EFG-SBM) is developed for anti-plane fracture analysis.This is a boundary-type meshless method,in which the element-free Galerkin method is adopted for performing the circumferential discretization and therefore only nodes on the boundary are required.In addition,no fundamental solution is required in contrast with the boundary element method.In order to simplify the enforcement of the essential boundary conditions,the modified moving least squares shape functions are derived through the establishment of the relationship between the nodal values and the fictitious nodal values.In the radial direction,the solution is analytical so that this method is a semi-analytical numerical method.At last,numerical examples are presented to demonstrate that utilizing the proposed method to solve anti-plane crack problem has the advantages of simple postprocessing and higher accuracy.
复合材料层合板自由振动分析的无网格自然邻接点Petrov-Galerkin法 Free vibration analysis of laminated composite plates by the meshless natural neighbour Petrov-Galerkin method
Free vibration analysis of laminated composite plates by the meshless natural neighbour Petrov-Galerkin method

,李鹤
- , 2018, DOI: 10.7511/jslx20171005001
Abstract: 基于一阶剪切变形理论,提出了复合材料层合板自由振动分析的网格自然邻接点Petrov-Galerkin法。计算时在复合材料层合板中面上仅需要布置一系列的离散节点,并利用这些节点构建插值函数。在板中面上的局部多边形子域上,采用加权余量法建立复合材料层合板自由振动分析的离散化控制方程,并且这些子域可由Delaunay三角形方便创建。自然邻接点插值形函数具有Kronecker delta函数性质,因而需经过特别处理就能准确地施加本质边界条件。对不同边界条件、不同跨厚比、不同材料参数和不同铺设角度的复合材料层合板,由本文提出的网格自然邻接点Petrov-Galerkin法进行自由振动分析时均可得到满意的结果。数值算例结果表明,本文方法求解复合材料层合板的自由振动问题是行之有效的。
Based on the first-order shear deformation theory,a meshless natural neighbour Petrov-Galerkin method has been developed for free vibration analysis of laminated composite plates in this paper.In the computation,only a set of randomly distributed nodes on the middle plane of the considered plate are required and the interpolation functions are constructed through these nodes.The discretized governing equations for free vibration analysis of laminated composite plates are derived by using the weighted residual method over local polygonal sub-domains in the mean surface of the plate.These polygonal sub-domains can be conveniently constructed with Delaunay tessellations.Because the constructed shape functions from the natural neighbour interpolation possess the Kronecker delta function property,the essential boundary conditions can be imposed accurately without any special techniques.The natural frequencies computed by the present meshless natural neighbour Petrov-Galerkin method for the laminated composite plates with various boundary conditions,side-to-thickness ratios,material parameters and laying angles are all satisfactory,which demonstrates that the proposed method for free vibration analysis of laminated composite plates is effective.
弹塑性力学问题的无单元伽辽金法
龙述尧,
工程力学 , 2003,
Abstract: 用无单元伽辽金法(EFGM)求解了弹塑性平面问题.EFGM采用移动最小二乘函数近似试函数,并用罚函数法施加本质(位移)边界条件,这是一种与单元划分无关的无网格方法.文中采用了Newton-Raphson增量迭代法进行计算.算例表明;EFGM在求解弹塑性问题时仍具有稳定性好,收敛快的优点.
梦想的解析
The Analysis of Dream
 [PDF]


Advances in Social Sciences (ASS) , 2014, DOI: 10.12677/ASS.2014.31001
Abstract: 平等和自由可以演化为稳定与灵活的辩证,即维护法律的稳定从而达到贯彻立宪者的目的,维护法律的权威,又使问题得到灵活的解决不受框架的局限。这是全世界所有实行民主制度国家都遇到的且难以解决的问题。崇尚自由的美国人所做的“美国梦”追求机会平等;拥有灿烂文明的中国人所做的“中国梦”期盼中华民族的伟大复兴
Equality and freedom can evolve as a stable and flexible dialectic, which means maintaining the stability of the law so as to achieve the purpose of the framers; maintaining the authority of law, and also solving problem flexibly without framework limitations. It is a problem that all the countries of democratic system have encountered and is difficult to solve. Americans advocating freedom make the American Dream
我国碳强度市场的交易情景设置及政策研究
Carbon Intensity Market Trading Scene Setting and Policy Research in China
 [PDF]


Journal of Low Carbon Economy (JLCE) , 2016, DOI: 10.12677/JLCE.2016.51002
Abstract:
全球气候变化问题在《京都议定书》的协议之下,萌生了全球碳排放权的交易市场。我国的碳交易市场的建设刻不容缓,但是不能照搬发达国家的模式,应该寻找适合我国国情的碳减排途径。为实现我国碳强度减排的目标,本文设置了跨行业、跨区域和跨期三种碳强度交易情景。并且,为保证三种碳强度市场交易机制的顺利实施,对三种交易情景的碳交易进行了相应的配套政策引导和行政手段管理,从而更好地促进我国碳交易市场的健康发展。
Under the Kyoto protocol in face to the global climate change problem, the global carbon emis-sions trading market initiated. It is very urgent to the construction of the carbon trading market in China. But our market cannot copy the mode of developed countries, it should be to find a way suitable for the situation of our country’s carbon emissions. In order to achieve the goal of China’s carbon intensity reduction goal, this paper sets up three kinds of carbon trading scenes, including market trading of cross-industry, cross-regional and inter-temporal. In order to ensure the smooth implementation of market trading mechanism, three scenes of carbon trading have situated the corresponding supporting policies to guide market and administrative means to manage trading. It can promote the healthy development of the carbon trading market in China.
分光光度法测定三激励值表示水和废水的色度

环境科学 , 1988,
Abstract: 色度是表示水质指标的重要内容,日、美等国采用分光光度法、三激励滤光法作为测定水和废水色度的标准方法,均用测定三激励值的方法以主波长、色调、明度和纯度来表示水样的色度。铂钴法适于较清洁的水样(如地面水)测定,稀释倍数法则用于废水的色度测定,由于比视感度的差异使稀释倍
猪心线粒体可溶性ATP酶(F_1)与H~+-ATP酶复合体(F_0·F_1)的Arrhenius图比较
周立
科学通报 , 1986,
Abstract: 线粒体H~+-ATP酶是一个很复杂的复合体,位于线粒体内膜,是偶联磷酸化的关键装置。它具有催化ATP合成和ATP水解的双重功能。H~+-ATP酶复合体由三部分组成:位于膜外的可溶性头部(F_1)、嵌在膜内疏水区的基部(F0)及联系F_1和F_0的柄(OSCP)。其中可溶性F_1是H~+-ATP酶的催化活性部分,当它从膜上分离下来后,虽然不再能催化ATP合成,仍具有水解ATP的功能。但对抑制剂寡霉素不敏感,对冷不稳定。当F_1与F_0和膜脂重新结合形成H~+-ATP酶复合体之后,催化ATP水解的活性又具有对抑制剂寡霉素的敏感性和对冷稳定性的性能。
“抗生菌肥料”的研究

科学通报 , 1957,
Abstract: 近年来世界各国对“细菌肥料”的研究和利用,在农业生产中曾取得了一定的成绩。但是,这些肥料对农作物尚缺乏防病效果,同时也没有利用“抗生菌”在肥料中所产生的物质来刺激植物生长,以达到增产的目的。7年来,我们在中国北部地区采集了2,562个放线菌系,其中“G_4”及“5406”两系能抗克所测定的32种
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