查询词典 theories
- 与 theories 相关的网络例句 [注:此内容来源于网络,仅供参考]
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First, we discuss several theories of risk measures respectively such as theories ofcoherent measures of risk, spectral measures of risk and distortion measures of risk.Within the framework of these theories, we discuss and compare standard deviation,mean absolute deviation, lower partial moment, Ginis difference, VaR, CVaR and soon. We conclude that CVaR is superior to other measures with respect to theoreticalproperties.
首先,本文分别讨论了一致风险测度理论、谱风险测度理论、失真风险测度理论和随机占优一致风险测度理论等风险度量评价理论,在这些理论框架内讨论和比较了标准差、平均绝对离差、下偏位矩、基尼均差、VaR以及CVaR等风险度量。
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The basic approach of protecting people from being hurt or killed in an accident is to improve crashworthiness of vehicles. This paper starts with discussing theories and methods for vehicle passive safety design, which included experiential methods, analytic methods, multi-body dynamics methods, crash test methods and the finite element method. Emphasis will be paid to the basic FEM theories and algorithms of impact problems. Topics discussed include the governing equation, element discretization, hourglass control, time integration, material model, shell element algorithms and contact-impact algorithms. For more reliable simulation results, this paper then conducts study on how to accurately get material model parameters by combining the FEM method with experimental method, and develops relevant material test machine and parameter calculating software. Based on that, basic typical impact simulation and test validation study are conducted. On the basis of the above work, the paper studies the thin-shell structures'crashworthiness, which was affected by the following factors: spot-weld features, shell thickness, cross-section and pre-deformation. As to vehicle parts'crashworthiness, the paper conducts simulation study of designing energy-absorbing steering system and adaptive airbag system. A practical energy-absorbing steering wheel is designed as an example. In further depth research, the paper suggests several inverse quantificational methods for vehicle crashworthiness design based on the ideal crash characteristics. The above theories and methods are applied with good results through several practical vehicles' crashworthiness design and improvement.
文中对汽车碰撞安全性的设计理论和方法进行了归类和总结,其中包括经验法、解析法、多刚体动力学法、试验法以及有限元方法等;重点介绍了碰撞有限元法的基本理论和有关算法,涉及到有限元求解控制方程、单元离散、沙漏模态控制、时间积分、材料模型和应力修正、薄壳单元算法以及接触碰撞界面算法等,探讨了有限元计算中的材料模型参数获取技术,开发了相应的材料试验装置及材料模型参数反求软件,在此基础上进行了基本的碰撞仿真算例和试验对比研究;文中通过应用有限元方法研究了薄壁构件的碰撞吸能特性,指出了设计薄壁吸能构件时需要考虑的几个主要影响因素,即焊点、壁厚、横截面和预变形等;在关于车辆部件的碰撞安全性能设计中进行了吸能转向机构和自适应安全气囊的仿真研究,提出了吸能转向机构和自适应安全气囊的仿真研究方法;文中最后探讨了整车碰撞性能的设计与改进方法,提出了以理想碰撞特性为目标,采用分段加速度或者根据碰撞时间进行设计的反推设计法、部件吸能仿真优化设计法等量化设计方法,并通过综合应用文中所讨论的相关技术进行了整车碰撞性能的设计与改进实例研究,所选定的车型是大众化的普通轿车和碰撞安全性基础较差的微型面包车,研究结果表明,本文所提出的设计与改进方法是适用而有效的,具有重要的工程实用意义和价值。
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In the course of research, we employeda series of"mixed"methods and established the view point of binary opposition under the guidance and on the basis of the theories on language and parole, the theories of temporary changes and diachronic changes and the theories of language diversity and language development, as well as their relationships.
研究中,我们以语言和言语及其关系的理论,以临时变化和历史变化及其关系的理论,以语言变异和语言发展及其关系的理论等为指导和基础,采用一系列"结合型"的研究方法,定位于二元对立的研究视角。
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About the stability analysis of railway vehicle system has been discussed for years. In reference reviews, we will introduce all about these theories, including linear and nonlinear theories. Finding out these theories, and improving the inconsequent assumptions.
关於轨道车辆的稳定性分析已有多年历史,在本论文文献回顾中将从最早的Hertz理论开始做介绍,逐步探究各理论发展过程,最后介绍Heuristic非线性理论,并藉由改进文献中不合理的假设,套用模型做数据模拟分析与讨论。
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We could use two 'inharmonious' to depict the current situation of researches and applications of the accounting theories: one is the inharmony of the development of the theories of financial accounting and management accounting, where the research of the theories of management accounting far drops behind that of financial accounting; the other is the inharmony of the applications of management accounting.
当前我国会计理论研究与应用的现状可以用两个"不协调"加以概括:一个是财务会计理论与管理会计理论发展不协调,管理会计理论的研究远远落后于财务会计;另一个是管理会计理论研究与应用的不协调,很多先进的、可行的会计理论方法在我国企业没有得到有效的应用,造成企业效益的低下和管理水平的落后。
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Some foundational theories concerned to non-commercial forest compensation have been studied in this dissertation. They are ecological theories, environmental and economical theories, silvical theories.
本文对公益林补偿所需要的有关基础理论进行了整理归纳,其基础理论主要有:生态学基础理论、环境经济学基础理论、林学基础理论。
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Four aspects are studied in this paper: the study of non-linear syllable theory of the analysis ofdengyunxue of the syllabic structure of Chinese character, the study of the distinctive feature theory of the four types of the articulation of initials, the study of the markedness theory of the devoicing of the fully voiced initials and the study of the feature geometry theory of the correlates between the devoicing of the fully voiced initials and tonal change. Through our studies, conclusions can be drawn as follows:(1) Contemporary phonological theories can be used to elucidate the principle of Chinese dengyunxue;(2) Contemporary phonological theories can be used to explain the historical phonetic change of Chinese;(3) Different theories and methods of contemporary phonology should be applied to deal with different problems of Chinese phonology;(4) The application of contemporary phonological theories to the study of the historical phonetic change of Chinese is helpful to test and verify the universalizability of these theoretical hypotheses
通过对等韵字音结构分析的非线性音节理论研究、声纽四等的区别特征理论研究、全浊声母清化的标记理论研究和浊音清化与声调演变相互关系的特征架构理论研究等四项初探,揭示了:(1)当代音系理论可以阐明汉语等韵学学理;(2)当代音系理论可以解释汉语历史音变现象;(3)不同的汉语音韵问题,应该用不同的当代音系理论方法来研究;(4)当代音系理论在汉语历史音变研究中的运用,有助于验证其理论假设的普适性
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I mean, it doesn't, but I don't think psychotherapies really can adequately have developmental theories; I think they should be theories of functioning and theories of practice, not theories of development.
我是说我不认为心理治疗可以有完整的发展理论,心理治疗应当有功能理论、实践理论,但不是发展理论。
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Since the 80s of the 20th century, the West various culture theories and literature theories, especially postmodern culture theories and literature theories (post-structuralism, such as unmaking, deconstruction, discontinuity, disppearance, metafiction or anti-novel, disruption, decentring, antitotalization, decharmlizing, signifier and signified and so on), are emerging one after another, which make a notable impact on Chinese literature and art more or less.
二十世纪八十年代以后,西方的各种文化理论和文学理论、尤其是后现代的文化理论和文学理论(譬如后结构主义理论,消解,解构,非连续性,消散,元小说——也称反小说,断裂,去中心,非总体化,去圣,能指与所指等西方学术话语)接连进入我国,这些都或多或少地影响着包括先锋小说在内的文学创作倾向。
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This problem has been numerous points of scientist research,currently is to let a hundred flowers blossom,profusion of different opinions,appeared several ten kinds of theories and theories,such as:lnherit the gene theory,immunity,free free radicals theory,endocrine system theory,the body cell mutation theory etc,these theories and theories are all to reflected to result in the factor of the decrepitude from an on the side.
人类衰老一直是众多科学家研究的重点,衰老的理论和学说百花齐放,众说纷纭,如:遗传基因学说、免疫学说、自由基学说,内分泌系统学说、人体细胞突变学说等,这些学说和理论都从一个侧面反映了造成衰老的因素。
- 推荐网络例句
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Do you know, i need you to come back
你知道吗,我需要你回来
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Yang yinshu、Wang xiangsheng、Li decang,The first discovery of haemaphysalis conicinna.
1〕 杨银书,王祥生,李德昌。安徽省首次发现嗜群血蜱。
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Chapter Three: Type classification of DE structure in Sino-Tibetan languages.
第三章汉藏语&的&字结构的类型划分。