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Search Results: 1 - 10 of 364740 matches for " 王志祥 "
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危险犯概念比较研究

法学家 , 2002,
Abstract:
基于Hellinger距离的连续型总体的假设检验

安徽师范大学学报(自然科学版) , 2015,
Abstract: 研究了两个连续型总体参数的假设检验问题.基于Hellinger距离和参数的最大似然估计,建立了一个检验统计量.在一定条件下,证明了所建立的统计量渐近服从自由度为1的卡方分布.最后用随机模拟的方法研究了所建立的统计量的稳健性,并且与似然比检验作了比较.?
益气滋阴、清热活血法治疗狼疮性肾炎临床研究
李琦,
中国中医药信息杂志 , 2011, DOI: 10.3969/j.issn.1005-5304.2011.08.007
Abstract: 目的观察以中医益气滋阴、清热活血原则组方的滋阴清斑汤配合西药治疗狼疮性肾炎(ln)阴虚内热型的临床疗效,以及对患者自身抗体、补体的影响。方法将阴虚内热型ln患者60例随机分为试验组40例和对照组20例。2组均给予控制感染,维持水、电解质、酸碱平衡,控制并发症,应用激素等治疗,试验组在此基础上配合服用滋阴清斑汤,用药6个月。观察2组治疗前后临床症状及实验室检查的变化情况。结果试验组总有效率为87.5%(35/40),对照组为70.0%(14/20),2组比较差异有统计学意义(p<0.05);试验组在改善患者临床症状积分,升高红细胞、血红蛋白、补体c3,及降低血肌酐、尿蛋白等方面效果优于对照组(p<0.05或p<0.01),且对改善某些临床症状效果较好。结论中西医结合治疗在改善ln患者临床症状和实验室指标、提高整体疗效方面效果更好。
一类流体混合模型的广义差分法
Generalized Difference Methods for a Fluid Mixture Model
 [PDF]

林素丽, ,
Applied Physics (APP) , 2012, DOI: 10.12677/app.2012.22006
Abstract:

本文针对一类流体混合模型设计了两种数值格式。该流体混合模型是关于可收缩间叶细胞组织变形的模型,是由非线性的双曲型方程和椭圆型方程组成的混合方程组。第一种方法通过选取试探函数空间和检验函数空间为一次元函数空间和分片常函数空间,针对光滑情形,得到的广义差分格式具有二阶精度。为消除解在间断处的数值震荡,我们设计求解该流体混合模型的广义迎风差分格式。数值结果表明两种数值方法对考虑的混合模型是有效的。
In this paper, we propose two numerical methods for a fluid mixture model. The model is usually used to describe the tissue deformations. It contains a nonlinear hyperbolic equation and an elliptic equation. The first numerical method is the generalized difference method based on linear element function space and piecewise constant function space. Numerical experiments show that our scheme is second-order accuracy in space. To eliminate the oscillation near the discontinuities, we design a generalized upwind difference method to solve the fluid model. Numerical results show that the two methods are effective for the considered fluid mixture model.

基于自适应动态逆的四旋翼机器人控制器设计
Adaptive Dynamic Inversion Controller for Quad Rotor Aerial Robot
 [PDF]

, 立峰, 赫丛奎
Dynamical Systems and Control (DSC) , 2014, DOI: 10.12677/DSC.2014.31001
Abstract:
本文针对“X”型四旋翼空中机器人的轨迹跟踪问题,设计了一种自适应动态逆控制器。为了加强控制系统的鲁棒性,提出一个自适应动态矢量用于补偿模型逆误差,使系统达到Lyapunov渐近稳定。基于四旋翼机器人复杂的非线性动态模型,自适应动态逆控制器能在线估计并补偿四旋翼机器人的模型误差,使系统达到渐近稳定和轨迹跟踪的目的。MATLAB仿真实验表明该控制方案能满足系统稳定和轨迹跟踪的目的
This paper presents an adaptive dynamic inversion controller for trajectory tracking of quad rotor aerial robot with X type configuration. In order to enhance the robustness of dynamic inversion controller, an adaptive dynamic variable vector is used to compensate the model inversion error and achieve the asymptotic stability. On the base of a nonlinear dynamic model of the quad rotor, adaptive dynamic inversion nonlinear controller is synthesized for the purpose of stabilization and trajectory tracking. The proposed control method can compensate the deviation of model inaccuracy. It behaves perfectly at the reference altitude and trajectory track in MATLAB simulation.
质子交换膜燃料电池停机策略的实验研究 Experimental Study on Shutdown Strategy of Proton Exchange Membrane Fuel Cells
,
- , 2016,
Abstract: 质子交换膜燃料电池(PEMFC)停机过程中引起性能衰减的根本原因是阳极侧残留有氢气。为了满足快速消除电堆内残留的氢气,研究提出了利用空冷电堆的风扇对电堆放电和使用辅助负载对电堆中各个单电池单独放电的停机控制策略。通过实验研究对比了直接停机、利用辅助负载整体放电和利用辅助负载对各个单电池单独放电三种停机方式对PEMFC性能的影响。结果表明,利用辅助负载对各个单电池单独放电的停机策略不仅能缩短燃料电池停机后各个单电池维持在高电位的时间,同时也能防止PEMFC停机放电过程中单电池反极现象的发生,是一种十分有效的质子交换膜燃料电池停机策略。
我国刑法典的轻罪化改造 On the Reform of Misdemeanor Orientation to the Penal Code of China
,韩雪
- , 2015,
Abstract: 由立法定性加立法定量的犯罪设定模式所决定,我国现行刑法典呈现出明显的重罪重刑的特点。这使得刑法典原本设定的限缩式的犯罪圈出现不断任意扩张的趋势,同时又陷入在重刑基础上再加大刑罚投入量的恶性循环。在不彻底动摇我国刑法典中立法定性加立法定量的犯罪设定模式的前提下,就消减"重罪重刑"式的刑法典存在的上述弊端而言,需要对刑法典进行轻罪化改造。具体而言,一方面应对现行刑法典划定的犯罪圈进行轻罪化改造,即适度扩张犯罪圈,将更多的轻罪纳入刑法处罚的范围;另一方面,应摒弃传统的重刑主义观念,对现行刑法典中的法定刑作轻刑化改造,即从总体上对已有的法定刑刑种作轻刑化调整,并为部分犯罪增加轻刑的法定刑档次,从而使轻刑的适用具有法律上的根据,为这些犯罪增加轻罪的情形。
NF-κB、MIF在子宫内膜异位症的表达及其相关性研究
, , 卢丹 ,
扬州大学学报(农业与生命科学版) , 2012,
Abstract: ????采用免疫组织化学SABC法检测30例对照组子宫内膜、35例子宫内膜异位症患者的在位内膜及60例子宫内膜异位症患者的异位内膜中核转录因子-κB(NF-κB)、巨噬细胞迁移抑制因子(MIF)的表达。结果表明:NF-κB、MIF主要表达于\{3组\}内膜的腺上皮细胞,在异位内膜的间质及血管内皮细胞中亦有表达。对照组子宫内膜低表达,而在患者异位内膜的表达最强(?P?<0?01);NF-κB与MIF在3组内膜中的表达具有较强的相关性,相关系数分别是0?875、0?882、0?927。NF-κB、MIF在子宫内膜异位症患者的在位及异位的内膜中有异常高表达,而在正常子宫内膜组织中低表达;NF-κB与MIF的表达呈正相关。NF-κB可能通过上调MIF的表达在子宫内膜异位症发病机制中起重要作用。
拓展性实践教学与科研创新的综合培养模式探讨
Explorations on Comprehensive Experimental Teaching System Based on Research Practice and Innovation
 [PDF]

陈润锋, 郑超, 马力, , 陶冶, 曹锦珠
Advances in Analytical Chemistry (AAC) , 2012, DOI: 10.12677/AAC.2012.24007
Abstract: 本文通过本科生化学实验教学过程中人才培养模式进行了探讨。主要论述了如何善于发现创新思想、及时保护和引导创新思想、创造发展创新实践的环境、拓展性实践教学与科研创新相结合的综合培养模式。以本单位的科研特色和学术氛围实践了学生参与科研创新的拓展性实践教学,取得良好的教学效果。
A more effective experimental teaching system on chemistry is discussed in this paper. The system lays em- phasis on how to discover, encourage, and guide the innovation ideas during cultivating students. It should provides more freedom for the students in practice teaching of developing research innovation ideas and try to set up a comprehensive teaching system. Based on our teaching practice of developmental and innovative research, the results are sat- isfactory.
两种三维数值造波方法的对比研究
Comparison of Two Methods of Wave Generating in 3-D Numerical Wave Tank
 [PDF]

, 侯国, 余洋, 许晟, 祝玉梅
International Journal of Fluid Dynamics (IJFD) , 2013, DOI: 10.12677/IJFD.2013.13007
Abstract:

数值造波技术随着计算机技术的发展越来越成熟,其与物理实验相比具有易实现、低成本的优点,是研究船舶与海洋工程水动力学的前沿课题。速度入口边界造波和质量源造波是两种比较常见的造波方法,本文分别采用这两种方法对波浪进行了模拟,结果表明,两种方法均得到预期的数值波浪,质量源造波技术的精度高,波浪传播过程衰减小,而设置边界造波实施简单和易于收敛,总的来说质量源造波效果优于设置边界造波技术。为研究结构物在波浪中响应时数值造波方法的选取提供参考。
 Wave-generating technology is becoming more and more mature with the development of the computer technology. Compared with physical experiment, it is easier for implementation and lower at cost. The numerical wave tanks are the frontiers of the shipbuilding and ocean engineering hydrodynamic fields in these days. Velocity-inlet boundary wave generating and mass source wave generating are the common methods. In this paper, both of the two methods are used for the simulation of numerical wave tank and the results are satisfactory. High precision and low attenuation are the merits of mass source wave generating, while velocity-inlet boundary wave generating has the advantage of easy implementation and good algorithm convergence. In general, mass source wave generating is better. Research in this paper can serve as a foundation for the simulation of numerical waves in structure-wave problems.

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