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Common Reflection Surface stack is a brand-new and special ZO imaging method, the theory of CRS stack stems from paraxial ray theory, the biggest difference between CRS stack and conventional ZO imaging method is that it consider a reflector R as a circular reflector segment Cr placed in the vinicity of reflector R, Cr can be seen as the second order approximation of the reflector. The CRS traveltime surface is the multi-coverage reflection response of the reflector mirror assigned to R.

共反射面元(CommonReflection Surface=CRS)叠加技术是一种全新的、特殊的零偏移距剖面成像方法,CRS迭加理论源于傍轴射线理论,它与普通的零偏移距剖面成像方法的最大区别是它认为地下反射层是由许多个小反射弧段互相叠合组成的,认为来自某反射点附近的一个邻域内的反射信息都可以对该反射点的成像作出贡献,因此对该反射点进行零偏移距成像时就应该聚焦更多的能量参与迭加。

A theoretical study of potential energy of solid surfaces and a deeply discussing of the influence of the adsorbed gases in the solid surfaces to the process of absorption and desorption were given.

从分子之间的作用力和分子之间相互作用的能量的角度对真空科学中表面吸附的位势理论进行了理论研究,并深入地探讨了固体表面吸附的气体分子层对气体的吸附与脱附的影响。

Using shape function andclassical interior ballistics theory, the influence relation of the PSS model parameter affectto splitting opportunity, increasing burning surface and interior ballistics characteristicswas researched.The splitting opportunity of PSS appears ahead the academic intending, thereason is that the thickness of outside burning layer is asymmetry, the thinner area splitsearlier, and the thicker area splits later, consequently, the PSS put up progressivity burningeffect. From the practical look, the burning progressivity effect is more profitable than thatincreasing burning surface suddenly.

采用形状函数和经典内弹道理论,研究了PSS发射药的药型参数对分裂时机、燃烧增面性和内弹道性能的影响关系,PSS发射药的分裂时机比理论预计值提前出现,原因是外侧面的燃烧层厚度不均匀,薄的地方先分裂,厚的地方晚分裂,从而表现出了渐增性的燃烧效果,从应用的角度出发,渐增性燃烧的效果比突增的效果要好。

A prediction model has been proposed to deal with threshold voltage shift as a function of 1MeV neutron flux and gate oxide thickness, and to deal with room-temperature annealing of threshold voltage shift induced-by 〓Coγ as a function of electric field and gate oxide thickness. The commonness and individuality of MOS device degradation between hot-carrier effect and ionizing radiation were investigated. The dependence of substrate current, gate current and threshold voltage shift due to hot-carrier on gate oxide thickness were simulated with MEDICI-2D simulator. The photocurrents of PN junction and bipolar transistor were studied. Their transient responses on varied bias voltages, pulse durations and absorbed doses were simulated. The influences of NPN base width on base and collector photocurrents were investigated. We also studied 1MeV neutron displacement damage in PN junction, and calculated reverse current leakage under the neutron flux of 2. 67×10〓 per square centimeter. 3 The study of nondestructive screening method for MOS radiation tolerance A theoretical and experimental study of nondestructive screening methods for radiation tolerance of nMOS and pMOS were firstly fulfilled. We determined the informative parameters pertinent to the method and proposed how to deal with experimental data and verify obtained results statistically, as well as make the required steps for nondestructive screening. Based on the experimental data of 180 samples of discrete pMOS devices, the relation between sample quantity and correlation coefficient, screening equation, and other significant results were obtained from the threshold voltage shifts of pre-and post-irradiation samples.

二、分立器件电离和位移辐射损伤响应研究在国内首次开展了电离辐射引起的氧化层阈值电压漂移和退火理论研究,编程计算了1MeV中子引起的MOS器件阈值电压漂移与中子通量及栅氧厚度的关系,计算了〓Coγ光子引起的阈值电压漂移及退火的时效曲线与纵向电场和栅氧厚度的关系等,对评估MOS型集成电路电离损伤和加固方法研究,以及论文中开展的MOSFETs无损筛选方法研究奠定了基础;分析了MOS器件热载流子损伤效应与辐射电离损伤效应之间的异同性,利用二维模拟软件MEDICI-2D模拟了衬底电流和栅电流,在不同栅氧厚度下随栅压的变化曲线,计算了热载流子效应造成的阈值电压漂移,研究结果对当前存在的以热载流子效应研究取代电离辐射损伤实验研究的设想,具有重要的参考价值;开展了PN结和双极晶体管电离光电流研究,计算了不同偏压、不同辐射脉宽和不同吸收剂量下PN结光电流的瞬时响应,计算了不同辐射脉宽下NPN晶体管基极电流和收集极电流的瞬时响应,以及基区宽度对NPN晶体管光电流的影响,研究结果对双极器件抗电离辐射损伤响应及加固方法研究具有重要意义;在国内首次开展了器件位移损伤的理论研究,分析了辐射产生的缺陷对电性能的影响,计算了注量为2.67×10〓cm〓的1MeV中子产生的缺陷对PN结反向电流的影响。

From the analysis of theory and technique character of ion-implantation and the energies, the implant range and straggle of nitrogen ions in 4H-SiC calculated by TRIM, the method to calculate the channel depth of 4H-SiC MESFET is present based on the energy diagram's analysis of implanted layer.

通过研究离子注入的理论和工艺特性,以及蒙特卡洛分析软件TRIM对氮离子注入4H-SiC的能量、深度和偏差等参数的分析,在注入层的能带理论分析的基础上,提出了计算离子注入4H-SiC MESFET器件的沟道深度的方法,以及离子注入工艺参数,包括能量、剂量的确定方法。

The SPLT is shown to explain a wide range of processing complexity phenomena not previously accounted for under a single theory, including (1) the lower complexity of subject-extracted relative clauses compared to object-extracted relative clauses,(2) numerous processing overload effects across languages, including the unacceptability of multiply center-embedded structures,(3) the lower complexity of cross-serial dependencies relative to center-embedded dependencies,(4) heaviness effects, such that sentences are easier to understand when larger phrases are placed later and (5) numerous ambiguity effects, such as those which have been argued to be evidence for the Active Filler Hypothesis.

SPLT可解释范围宽广的,非先前在一个单一理论下可说明的处理复杂性现象,包括(1)与受词抽离关系子句相较,主词抽离关系子句的低复杂度,(2)为数众多的跨语言间的处理超载效果,包括多层中心嵌入架构的不可接受性,(3)相对於中心嵌入依赖性,跨序列依赖性的低复杂度,(4)当较大的片语放在后面时,使句子较易理解之沈重效果,以及(5)许多的模糊效果,例如那些被争论为主动充填理论之证据者。

Based on the project requirements, the research has focused on the confined electronic states in the semiconductor surface quantum wells. The moden quantum theory and advanced material growth technology have been used. The interband transitions in the surface quantum well have been studied by the in-situ photo-modulated reflection spectroscopy combined with the molecular beam epitaxy system. The optical transitions, including the tansition between ground or excited states of the electron and hole states, have been directly observed.

根据项目任务书的要求,本项研究在现代量子理论与先进材料生长技术基础上对半导体表面量子阱阱结构中的受限电子能态进行系统的光谱实验与理论研究,通过与分子束外延设备直接耦合的光调制光谱手段在原子层量级上直接观测到了表面量子阱中本征能态间的光跃迁特性,其中包括基态间的跃迁和激发态间的跃迁。

The text get a start in the petrophysical property of the carbonate rock, and introduce the basic characters of the carbonate rock from the logging aspects, and analyze the connection between the logging information and the geological specificities of the fracture-type reservoir, expatiate the ways to evaluate the fractures and vugs with logging material. Last, the this part introduce the wavelet analysis methods.

论文从碳酸盐岩的岩石物理性质着手,从测井学的基本理论出发,介绍碳酸盐岩的基本特点,分析测井资料与裂缝性储层的各种地质特性之间的联系,就测井资料评价裂缝、溶洞作了一定的阐述,同时对研究过程中将要用到的小波分析方法进行介绍,奠定整个研究工作的理论基础。

Based on basic theory of elastic wave propagation, wave equation forpropagation of elastic wave in 2 dimension vertical inhomogeneous mediumof similar concrete cutoff wall model is developed. 2 dimension elastic sheetof concrete cutoff wall is established to research law and energy distributionrelations between propagation, attenuation, reflection and transmission ofelastic wave in concrete cutoff wall; Based on the concept of resolution, thecontent of vertical reflection method used to inspect concrete cutoff wallresolution is raised and factors will have influences on resolution are analyzed,expression of defective layer composite reflection factor and detectabledefective layer maximum thickness are developed; Relations between allsteps of sampling system of vertical reflection are build, the influence ofcentrum characteristics and receiving sensor on testing results are analyzed,therefore parameter requirements for testing instrument and parameter selection principle of collected parameters are raised.

2从弹性波传播的基本理论研究出发,推导了弹性波在类似混凝土防渗墙模型的二维垂向不均匀介质中传播的波动方程式;建立了混凝土防渗墙二维弹性薄板模型,研究弹性波在混凝土防渗墙中的传播、衰减、反射、透射规律及能量分配关系;从分辨率的概念出发,提出了垂直反射法检测混凝土防渗墙分辨率的内涵,对影响分辨率的因素进行了分析,推导出了缺陷层复合反射系数、可检测缺陷层极限厚度的表达式;建立了垂直反射法采样系统各环节之间的关系,研究分析了震源特性、接收传感器对测试结果的影响,提出了对测试仪器参数的要求及采集参数的选择原则。

The main research contents are as follows:1. Through massive calculation, analysis and comparison, sum up the similarities and differences between the special-shaped cross sections and rectangular cross sections in mechanical features, between reinforced concrete special-shaped columns and rectangular columns in load-bearing capacity, ductility performance and provide necessary basic concepts and data for further understanding the characteristics of the special-shaped columns;2. Through massive elastic calculations and elasto-plastic analysis, under the preconditions of satisfying the code's requirements for axial compression ratio, limit value of lateral displacement and load-bearing capacity of normal section,oblique section and beam-column joint, under circumstances of different intensity of earthquake, structure dead weight, sort of site and column grid bay dimension, the variation regularity of maximum suitable height of structure, and thus sum up the maximum suitable height of structure for code for the purpose of macro-control while deciding the design scheme;3. Make a preliminary study on the stress feature of reinforced concrete special-shaped column and Z-shaped column of which the ratio of limb length to limb thickness is between 4~5 ,and the preliminary design method is suggested;4. Through elato-plastic time history dynamic analysis of typical projects, check up the weak storey of the special-shaped column structure and yielding, breaking and collapse mechanism to satisfy the earthquake resistant requirement to buildings of remaining stand under strong earthquake;5. Derive for project use simplified calculation formula of vibration period, suitable vibration period, suitable rigidity of special-shaped column structure through theoretical analysis, and provide an easy and practical method for deciding the structure scheme economically, safely and reasonably;6. Based on the study achievements in theory and massive analysis and calculations of this paper, sum up the regularities of inner force, deformation of special-shaped column structure and seismic conceptual design, and thus the suggection of seismic design of special-shaped column structures is presented.

本文研究的主要内容如下:通过大量的计算、分析和对比,总结出异形截面与矩形截面在力学特性、钢筋混凝土异形截面柱与矩形截面柱在承载能力、延性性能等方面的异同,为深入了解异形截面柱的特点提供必要的基本概念和数据;通过大量的弹性及弹塑性计算分析,在满足规程对轴压比、侧移限值及正截面、斜截面、节点承载力抗震验算要求的前提下,在不同抗震设防烈度、结构自重、场地类别及柱网开间尺寸情况下最大适宜高度的变化规律,并在此基础上总结归纳出异形柱结构的最大适用高度规定,可用于规程,以便于在确定方案时起到宏观控制的作用;对肢长与肢厚比在4~5的钢筋混凝土异形截面柱及Z形柱的受力特点进行初步探讨,提出初步的设计方法;通过对典型工程的弹塑性动力时程分析,检验异形柱结构的薄弱层及屈服、破坏、倒塌机制,以达到建筑物大震不倒的抗震设防要求;通过理论分析,推导出异形柱结构自振周期,以及适宜自振周期、适宜刚度的工程实用简化计算公式,为经济、安全、合理地确定结构方案提供简便实用的方法;在本文理论分析、计算以及大量的研究成果基础上,总结归纳出异形柱结构内力、变形的规律及抗震概念设计内容,并在此基础上提出异形柱结构的抗震设计建议。

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推荐网络例句

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。

The new PS20 solar power tower collected sunlight through mirrors known as "heliostats" to produce steam that is converted into electricity by a turbine in Sanlucar la Mayor, Spain, Wednesday.

聚光:照片上是建在西班牙桑路卡拉马尤城的一座新型PS20塔式太阳能电站。被称为&日光反射装置&的镜子将太阳光反射到主塔,然后用聚集的热量产生蒸汽进而通过涡轮机转化为电力