在讨论中
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The output probability distribution of charge carrier multiplier structure from the electron multiplying charge-coupled device and its influence on image uniformity are studied. The probability model is established for the CCM structure of EMCCD. And based on the probability generating function and its properties, the probability distribution function of multiple CCM stages is deduced and its application in improving image uniformity is also discussed.
为了研究电子倍增电荷耦合器件中电荷载流子倍增结构的输出概率分布及其对图像均匀性的影响,建立了EMCCD中CCM结构的概率模型,利用概率生成函数推导了多级CCM倍增结构的输出概率密度函数,讨论了PDF在提高图像均匀性中的应用。
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This means that the understanding of agricultural activities is still an important element in understanding modern rurality.
乡村性是描述、判断乡村之所以为乡村的标准,过去许多研究倾向透过实证取径的指标测量,描述乡村性组成之元素,对这样的研究而言,农业生产仅是对乡村性探讨中的一个变项,在农业活动已然式微的今日乡村中,有些学者认为农业已失去在乡村性讨论上的重要性,然而本研究从社会再现的观点思考乡村性,认为乡村居民日常言语所透露出的概念、意象、符号可作为描绘乡村形象的依据,而乡村民众日常言语的表现,又受其生活经验、所接收资讯等的影响,对部分生活在乡村的居民而言,仍视农业为其最重要的生活经验,这说明了对农业活动的理解,仍是探讨乡村性一个重要的面向。
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The second chapter introduces important issues and theories in Western thoughts about urban planning and its harmonies with the modern vision. These include above all minimalism since the 1960's, with its redefined sense of space and new site-specific rule of application, and modernism which champions such concepts as self-containment and solo possession.
而第二章从西方空间规画史与近代艺术思潮中,艺术与空间之间关系演变的影响,讨论传统中公共艺术以纪念物的形式介入城市空间,尝试与整体空间和谐并存,达到在空间上尺度与比例的和谐关系的方式,一九六○年代中末叶低限主义运动对於空间观念的改变,场域限定的应用,与作品自给自足、独立自若之现代主义艺术表现进行比较。
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In this dissertation, many works have been done on the basis of the summarization of the merits of all kinds of meshless methods after a large number of relevant references are read and studied. The basic ideas, principles of meshless methods and their development in the recent years are introduced synoptically. Applications of Element-free Galerkin method in elastic foundation plate are studied deeply and some useful conclusions are obtained as follows:(1) Comparisons between numerical solutions and analytical solutions for several different styles of weight functions, including Gaussian weight function, spline weight function and singular weight function etc, are performed. The results show that Gaussian weight function is the best one.(2) Ranges of relevant parameters for Gaussian weight function are given.(3) Influences of nodal distribution schemes and the number of Gaussian integrated dots on computational results are discussed.
在本文中,作者在认真阅读和研究所搜集到的大量参考文献、综合各种无网格法优点的基础上,首先,对无网格法的基本思想、基本原理、发展现状作了概括性的介绍;其次,对无单元Galerkin法在弹性地基板计算中的应用进行了较为深入的探讨:(1)分别对高斯型、样条型、奇异型等不同形式的权函数进行比较分析,数值计算结果与级数解析解的比较表明,高斯型权函数效果较好:(2)对高斯型权函数进行参数研究,得到地基板计算中相关参数的选取范围;(3)对不同节点分布方案和不同高斯积分对计算结果的影响等作了有益的讨论。
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Markov chain, Statistical theory and Optimization method are used to study bonus-malus systems, mainly focusing on revising and designing of the bonus-malus system. The primaty research content and results are obtained as followes:1. Based on the characteristic that the policy will be divided into homogeneous composition and policies of non-homogeneity in a models to fit the claims numbers.
在保险实践中,将保单分为同质性保单(来源:ABC论d1文网www.abclunwen.com)组合和非同质性保单组合,根据这个特点,文中分别用不同的模型来拟合保单的索赔次数,具体的讨论了两类组合中两种特殊分布,对分布中的参数进行了估计,给出了数值算例,并分析了拟合结果。2。
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In section 1.3, taking the advantage of the classification by the index arrays ,pointed out the space spanned by class A,B,C respect!vivety are subalgebras of NQ. We also show that the subspace spanned by the elements of length 2 in C is an abelian subalgebras of NQ,denoted by H.we find H is contained in the center of subalgebra P of the subspace spanned by the elements in class C.
在1.3节中,应用指标数组我们讨论了各类元素的性质,指出其第A,B,C类元各自张成的子空间均是N_Q的子代数,特别是C类中所有长度为2的元素张成了N_Q的Abel子代数H,且含于C生成的子代数P的中心Z中。
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As the complete characteristic curves of reversible pump turbine are often used to calculate the instantaneous parameters, this paper studies the characteristic curve and the wicket closure and opening law in pumped storage plants.Chapter 1 presents the importance and the necessity of this study and reviews the previous related research on hydraulic transient process and valve regulation in pumped storage plants.Chapter 2 analyzes the six collected characteristic curves of reversible pumped turbine and studies their diversification from the point of view of specific speed. The six collected discharge and moment curves with maximum efficiency have been fitted to piecewise continuous curves. This curve-fitting procedure is listed.Chapter 3 takes Liyang Pumped storage plant as an example and analyzes the effect of different characteristic curves on regulation guarantee parameters and the variety of its trochoid during the same operation status.Chapter 4 takes three pumped storage plants with different heads as examples and studies the characteristic of coordinated closure with wicket gate and ball valve and its effect on dynamic pressure in the spiral case, inlet pressure in the draft tube and the rise of rotating speed.Chapter 5 summarizes this paper and point out what should be done in the future research.
由于在过渡过程分析计算中,需要频繁利用可逆式机组的全特性曲线推求机组的瞬时参数,所以本文就特性曲线及关闭规律问题进行了研究,其主要内容如下:第1章,指出本文研究的意义和目的,回顾前人对水力过渡过程、抽水蓄能电站及阀调节的研究成果,在此基础上提出本文的研究内容;第2章,针对收集到的六套特性曲线,从比转速的角度出发来研究可逆式机组特性曲线的变化规律;并对六套曲线的最高效率流量和力矩曲线进行分段拟合,得到各分段函数的具体形式,再通过举例说明最高效率曲线的拟合步骤;第3章,以溧阳抽水蓄能电站为实例,分析讨论不同比转速特性曲线对调保参数造成的影响及对于相同工况其轨迹线的变化;第4章,结合高、中、低三水头段抽水蓄能电站,在导叶直线关闭的基础上,研究导叶与球阀协联关闭规律的特点及对蜗壳动水压力、尾水管进口压力及转速上升造成的影响;第5章,总结全文,提出今后研究的重点和方向。
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Through the research of direct search method based on 3D FEM, and its application for the tunnel slope stability analysis, the objectives of this work in this paper are as follows:1. The dynamic programming as well as its application for 3D side slope stability analysis is studied. With the introduction of graph theory concept, one kind of glide pattern of 3D slope is constructed, and the critical slip surface with smallest safety factor is searched with the aid of one auxiliary function including safety factor;2. Using the C++ programming language, the 3D slope stability analysis and the direct search procedure is established, and this method is testified applicably by some contrast analysis, also some influence factor in analysis is discussed;3. Integrated with the different actual situation in tunnel slope, considered its excavation, timbering and rain infiltration, its stability influence and rule is researched used this method, also some processing measure is proposed.
本文通过对三维有限元直接搜索法的研究,并将其应用于隧道边坡的稳定性分析中,主要的研究内容有:1、研究了动态规划原理及其在三维边坡稳定性分析中的应用,引入图论概念,构筑出一种边坡三维滑裂面的滑动模式,借助一个包含安全系数的辅助函数并通过动态搜索求得临界滑裂面与最小安全系数;2、采用C++程序设计语言,编制出边坡三维稳定性分析以及直接搜索法的程序,通过一些算例的对比分析,验证本文方法的适用性,并讨论了三维分析中的一些影响因素。3、结合隧道边坡的不同实际情况,考虑施工开挖过程、衬砌结构及降雨渗流等方面的因素,利用本文方法研究对其稳定性的影响和规律,并提出处理措施
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First, some critical problems in crystal growth like crystal seeding, Zn dephlegmation, geometrical selection and temperature fields are discussed in theory, and the possible kinds of defects appeared in crystal growth progress and the reasons are carefully researched. To control the concentration of Cd vacancies, a new method by which the Cd vacancies were compensated with excess Cd in the Cd rich starting materials has been developed, and a new kind of two-area tube furnace with good linear temperature distribution was designed.
首先,本文从理论上对坩埚下降法生长碲锌镉单晶体中的成核、Zn分凝、几何淘汰生长与温场等关键性问题进行了讨论,对在生长过程中可能出现的各种缺陷类型和形成原因进行了详细分析,提出了碲锌镉单晶体生长过程中Cd空位缺陷控制原理及方法,并针对坩埚下降法生长特点自行设计了两区域独立加热管式生长炉,获得具有较好线性分布的温场。
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This paper is about the hydrodynamics of blood in flow channel on the principle of hydrodynamics, and the hydrodynamics equations of Newton-fluid and Casson-fluid in rectangle channel. It also includes the studies of the diphasic flow. The fluid model selection is discussed from the examples in the hemorheology studies using flow channel technique.
本文用流体动力学原理,研究了流动渠道中的血流动力学问题,分别推导了牛顿流体、Casson流体在矩形渠道中的流体动力学方程,文中还对流动渠道内的二相流问题进行研究,并就血液流变学研究中利用流动渠道技术的应用实例,讨论了流体模型选择问题
- 推荐网络例句
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I didn't watch TV last night, because it .
昨晚我没有看电视,因为电视机坏了。
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Since this year, in a lot of villages of Beijing, TV of elevator liquid crystal was removed.
今年以来,在北京的很多小区里,电梯液晶电视被撤了下来。
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I'm running my simile to an extreme.
我比喻得过头了。