查询词典 case study

In the proof an analytic technique for the study of strong limit theorems of Markov chain is extended to the case of Even odd Markov chain fields on trees.

证明中将研究马氏链强极限定理的一种新的分析方法推广到树上奇偶马氏链场的情形。

Concluded that the definition and characteristics of science and ethics, combined with some of the modern case studies to discuss key issues of scientific ethics of the study, pointing out that on the one hand to strengthen the scientific and ethical quality of scientific workers in the other hand, the urgent need for ethical guidance of mankind, from the ethical angle of reflection on science, so that science can truly benefit of mankind.

最后指出科学伦理的含义、特点和本质。结合现代的一些案例分析，讨论科学伦理研究的主要问题，指出一方面要加强科学工作者的科学伦理素质，另一方面人类迫切需要伦理的指导，从伦理的角度反思科学，使科学真正能为人类造福。还原

Methods: 200 patients with peptic ulcer and Hp infection were divided into Hp group (100 cases) and antacid grop (100 cases) in case-control study.

将200例确诊NSAIDs消化性溃疡和感染Hp患者分为根除Hp组100例和抑酸组100例。

I spend my time on my bed nearly one day yesterday, it looked like I was tired, maybe I was, but I should study in the evening even if I was tired, as the case stands , I wasn't.

昨天我又睡了整整一个下午，看上去好像是有点累了，因为早上都起的早嘛，也许或可能吧，但就算白天很累，睡一觉后晚上也应该去学习嘛，可事实上，我还是没去。

Researching this problem can" t stay around the comment type research that kind of consider the case as it stands the level the top, and must rise the theories study the high degree, in order to more constitutionally announce to public the business enterprise informationalization"s substance and business enterprise to organize the organization s function and principle.

对这个问题的研究不能停留在那种就事论事的议论型研究水平上，必须上升到理论研究高度，以求更为本质地揭示企业信息化的实质与企业组织机构的作用机理。

Case-control study 1 included a total of 441 patients with a diagnosis of colorectal cancer and 658 controls; both groups were of Ashkenazi Jewish ancestry and from New York, New York.

病例对照研究-1包括总数441名结肠直肠癌患者的小组和658名没有该癌症的对照组；这2组人都有Ashkenazi Jewish血统，他们都来自纽约。

With the help of comparison theorem, sufficient conditions which guarantee permanence of the system are obtained. For the almost periodic case, by constructing a suitable Liapunov function, we obtained that the system has a unique globally asymptotically stable positive almost periodic solution. Finally, we study a multispecies predator-prey system with stage structure and Holling II type functional response.

第二部分考虑具有阶段结构的非自治扩散捕食系统，利用比较定理得到该系统持久生存的充分条件，其后在概周期情形下通过构造合适的Liapunov函数得到了保证该系统存在唯一一个全局渐近稳定的概周期解的条件。

Methods: Clinical data of 372 elderly patients with chronic auricular fibrillation were analyzed by case control study.

目的：了解老年心房颤动患者发生缺血性脑卒中的危险因素。

Based on the analysis of the mechanism of robot manipulators, a trajectory tracking controlling research model is first built up with ADAMS, and its mathematical model is formulated through the study of robot kinematics and dynamics. After the modeling errors are analyzed in practical robotic systems, a conception of centralized error is brought forward according to the theory of weighting functions. In the case of modeling errors' exist, the robotic uncertain model is derived by introducing an auxiliary control variable into inverse dynamic analysis. The control strategy of robust exponential convergence is applied to the robotic uncertain model, the applicable conditions and the applicable controller with this application are presented. The stable control effect under three main model uncertainties (parametric errors, joint disturbs, joint frictions) are systematically studied on the previously built research model. The problems of robust exponential convergence controller which often results in unstable output and so produces a large relative error when the input trajectory is in a small range are resolved by adjusting the control parameters based on the controller's structure.

本文在机械手的机械结构分析基础上，利用ADAMS建立了用于机械手轨线跟踪控制研究的机械手模型；通过对机器人运动学和动力学问题的研究，建立了机械手研究的数学模型；分析了机器人系统中模型误差的主要来源，根据加权函数法分析，提出了模型集中误差的概念；在存有模型误差的情况下，采用逆动力学结构并引入辅助控制量，由机器人误差模型推导了机器人非确定性模型；提出了采用鲁棒指数收敛法对上述机器人非确定性模型进行鲁棒镇定的控制策略，并给出了对机器人进行鲁棒指数收敛控制时系统不确定因素应满足的匹配条件；针对机械手研究模型，深入研究了鲁棒指数收敛控制器对机器人系统中常见的模型参数误差、关节扰动、关节摩擦等不确定因素的镇定控制效果；针对鲁棒指数收敛控制器易产生控制量振荡的问题以及在小范围内系统轨线跟踪的稳态误差过大问题，本文分别提出了基于控制器结构的控制参数调整法和基于轨线跟踪范围大小的控制参数分段切换法。

The new tyPe ERA will achieve Protection effect is: in the case of small normal angle (e wt0 o ) can defend large calibre anOLIrrpiercing Projectile, larg calibre shaPed chnye and near calibre tandem wthe miniStryThe emPhses is to stUdy defend lnye calibre artnour9iercing Proectile, specially aPply to protect tank barbette.

新型反应装甲要达到的防护效果是，在小法线角（θ=40°）的情况下，能防御大口径穿甲弹、大口径破甲弹，兼防近口径串联破甲战斗部，重点是研究对大口径穿甲弹的防护，特别适用于坦克炮塔的装甲防护。

The split between the two groups can hardly be papered over.

这两个团体间的分歧难以掩饰。

This approach not only encourages a greater number of responses, but minimizes the likelihood of stale groupthink.

这种做法不仅鼓励了更多的反应，而且减少跟风的可能性。