好理论的
- 与 好理论的 相关的网络例句 [注:此内容来源于网络,仅供参考]
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It's warning and outcry for mediocrity of human society by the superiority.Under the surrounding, The library can put a good equitant development into execution dependent upon whether the leader have a "sage jewel" of scientific decision making to understand and exert it's great signification poignantly.He delve library science and acquaint with professional skill, we can get a lot of practical experience from ancientness and today,Chinese and foreign. At the present time,run back over historical development of libary's management, getting a realization on property of common service and roles definitely.
在这样的大环境下,任何一个公共图书馆能否实现跨越式良好发展,这就要看领导者是否能以科学决策理念为"法宝",深刻理解科学决策的重大意义并能在理论和实践创新中很好地掌握和运用决策理念的主要内容;是否能在图书馆学科理论研究的工作实践中,以图书馆学科体系为科学决策的理论基础,深入了解和研究图书馆学的形成和发展史、学科体系及分支学科、研究方法及其前景展望等,从而为科学决策在本专业学科领域的研究创新打下坚实的理论基础;是否能通过纵横分析人类文明历史进程中公共图书馆的基本职能及其演变过程,更加明确其职能的公益性质,从而树立起以最大可能实现公共图书馆的职能为成功决策的实践标准。
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A theoretical model is built to investigate the simulation of the infrared characteristic of the metal structure with the PCM false target.Structure parameters of the PCM false target that suit for the simulation are investigated numerically.According to the results,further request on the improvement of the thermal conductivity of PCM is presented.An experimental platform is built and the numerical model is validated experimentally.Three key thermal characteristic components of the false tank(barbette,wheel and front armor plate) are manufactured and tested,and good results are obtained.A method for the thermal conductivity enhancing of PCM by using aluminum fins is studied,the influence of the structure parameters of PCM plates to the simulation effects are investigated numerically,and the reasonable configuration parameters of the PCM plates used to simulate the steel plates of different thickness are obtained.In the study of the application of heat convection method in IR false target,a passive infrared simulation system is designed to simulate the infrared characteristic of metal constructions.The system is made up of pipe-plate,pump,receiver,and working fluid.
在相变材料应用于红外示假的研究中,通过数值模拟,研究确定了适用于制作假目标的相变材料各物性参数的范围,分析了相变材料制作假目标的可行性,并根据所得结果,选取石蜡为研究对象,建立了相变材料模拟金属构件红外特征的理论模型,研究了适用于模拟各金属构件红外特征的相变材料假目标的相关结构参数,得出了相变材料假目标模拟各金属构件红外特征的理论结果,并对相变材料的导热系数这一物性提出了进一步的改进要求;搭建了假目标实验平台,验证了所建理论模型的准确性;以坦克假目标为研究对象,制作了炮塔、负重轮和前上装甲板三个坦克假目标的关键红外热特征部件,并进行了野外实验,取得了较好的结果;以添加铝肋片作为改进相变材料导热能力的手段,理论研究了此类导热增强型相变材料的相关结构参数对模拟效果的影响,得出了模拟不同厚度钢板红外特征的导热增强型相变材料的结构参数及模拟效果。
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The inelastic scattering angular distributions of discrete levels and double differential cross sections were calculated and analyzed by using the distorted wave Born approximation theory ,the unified Hauser-Feshbach model and the exciton model.
应用得到的光学模型势参量,根据光学模型、统一的Hauser-Feshbach和激子模型理论以及扭曲波玻恩近似理论,系统计算和分析了中子与58,60Ni反应的非弹散射角分布和双微分截面,理论结果与实验很好地一致。
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Based on the comprehensive researchof fundamental geopolitical theories,the dissertation reveals a dichonomic structure--the most important content and characteristic of geopolitics——influenceinternational relations with some disciplines by special modes;fourthly,with the logicof dichonomy,the dissertation analyses and researches the geopolitical position andstrategies of China,as one of the most important powers in the Rimland.
地缘政治学的基本理论不过对此作出了理论上的反馈;4、以二分论的理论逻辑,分析和研究了作为边缘地带最重要的大国之一、而又必须处理好海陆关系的中国的地缘政治地位和地缘政治战略,提出了要从地缘位置的一分为二到地缘选择的合二而一,对中国的地缘战略进行新的定位。应该指出的是,虽然本文追述了西方地缘政治学的一些基本理论和观点,但是本文的基本概念、主要观点、研究角度、逻辑论证和最后结论都是作者本人提出的。
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Using the one-atom theory, the electronic structures of Pt-electrocatalyst with fcc structure was determined as follows:(5dn)6.48 (5dc)2.02 (6sc)1.48(6sf)0.02. Compared to the result obtained by the first-principle method such as FP-LMTO, CASTEP, their results are in good agreement with each other. Comparing the calculations of physical properties such as lattice constants, cohesive energy and bulk modulus by OA method and first-principle method, the result obtained by OA method is in excellent agreement with experimental value, but the result obtained by first-principle method is not accordable. The relationship between the electronic structures and catalytic performance was explained qualitatively by OA method and first principle method according to its electronic structures. Because the d-orbital vacancies increases and static density is high around Fermi energy band, Pt has good catalytic performance.
摘 要:依据纯金属单原子理论确定面心立方结构电催化剂Pt的电子结构为(5dn)6.48(5dc)2.02-(6sc)1.48(6sf)0.02,与采用第一原理的FP-LMTO和CASTEP等方法所计算的电子结构相比较,其结果非常相近;由OA理论和第一原理方法计算的晶格常数、结合能、体弹性模量等物理参数进行比较,OA理论计算的结果与实验值较符合,而第一原理方法计算的结果与实验值相差较大;在此基础上用OA理论和第一原理方法研究了Pt的电子结构与催化性能的关系,由于d带空穴增多和费米能级附近态密度较高,导致金属Pt的催化性能很好。
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It's warning and outcry for mediocrity of human society by the superiority.Under the surrounding, The library can put a good equitant development into execution dependent upon whether the leader have a "sage jewel" of scientific decision making to understand and exert it's great signification poignantly.He delve library science and acquaint with professional skill, we can get a lot of practical experience from ancientness and today,Chinese and foreign. At the present time,run back over historical development of libary's management, getting a realization on property of common service and roles definitely.
在这样的大环境下,任何一个公共图书馆能否实现跨越式良好发展,这就要看领导者是否能以科学决策理念为&法宝&,深刻理解科学决策的重大意义并能在理论和实践创新中很好地掌握和运用决策理念的主要内容;是否能在图书馆学科理论研究的工作实践中,以图书馆学科体系为科学决策的理论基础,深入了解和研究图书馆学的形成和发展史、学科体系及分支学科、研究方法及其前景展望等,从而为科学决策在本专业学科领域的研究创新打下坚实的理论基础;是否能通过纵横分析人类文明历史进程中公共图书馆的基本职能及其演变过程,更加明确其职能的公益性质,从而树立起以最大可能实现公共图书馆的职能为成功决策的实践标准。
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Exogenous fault mechanics model characterizes wave making vibration propagation process caused by structural defects, defines transmission and reflection property of stress wave during the propagation, and provides theoretical basis for determining and seperating various kinds of polygenetic wave speed, which can be used in inversion and location of structural fault with satisfaction. By comprehensively using the two types of fault model that we presented, this paper has satisfactorily solved the classification and recognition of polygenetic faults of rotary support.
内源性故障力学模型较好地说明了回转支承内部的各种故障的形成和发展机理,描述了故障存在时回转支承的振动激励响应特性,为多源故障信号的分类识别提供了一种理论模型,外源性故障力学模型描述了由结构缺陷引起的波致振动传播过程,解释了传播过程中应力波的传递与反射特性,为各类故障波速的确定与分离提供了理论基础,能较好地用于结构故障的反演与定位。
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Compared of the efficiency of treating heavy metals in FGD wastewater with NaOH, Ca_2 and Mg_2. It indicated that NaOH was much efficient for precipitated waste water; Ca_2 was much efficient for unprecipitated waste water, the removal efficiency reached 98.4%. With the increasing of the main ion of Ca~2+, Cl~- in FGD wastewater, the efficiency decreased. It decreased 60% for the removing of Mn and 10% for Zn, Cd and Ni. The rectification coefficient token the Ksp of practical wastewater because it quite different with theoretic Ksp at different pH; the theoretic and practice addition were proportioned and it commonly reached 1:300.The precipitation efficiency of Na2S at different pH and the effect of Ca2+ was determined.
比较了NaOH、Ca_2和Mg_2处理脱硫废水时重金属的去除效果,分析了Ca~(2+)、SO_4~(2-)和Cl~-等主要离子的影响,结果表明:NaOH和Ca_2能有效处理脱硫废水中的重金属;对澄清废水而言,NaOH效果较好,对于未澄清废水而言,Ca_2效果更好,但去除废水中重金属的效率都能达到98.4%;随着Ca~(2+)、Cl~-等主要离子浓度的增大,中和作用去除重金属的效率降低,Mn最大降低60%,Zn,Cd,Ni降低10%左右;实际重金属浓度和用理论Ksp计算所得值差别很大,通过校正系数能有效计算实际重金属浓度;实现相同pH时氢氧化物的理论和实际投加量成一定比例,最大可达1:500。
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ABSTRACT The paper mainly studies the variable structure adaptive control theory for uncertain systems, and applicated the theory into the designs of bank-to-turn missile autopilots. The main contributions of the paper are as follows:(1) Under the condition that all the matched or mismatched parameter, input and disturbance uncertainties exist, a complete set of variable structure control system design and analysis method is proposed and investigated, which brecks throush the serious confines of variable structure invariance conditions theoretically and widen the application area of the VSC theory greatly.
本文着重研究了不确定性系统的变结构自适应控制理论,解决了目前变结构控制理论和自适应控制理论中存在且亟待解决的四个方面的问题,将获得的理论研究成果直接应用于倾斜转弯导弹的自动驾驶仪设计中,取得了很好的结果。
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The obtained results are in good agreement with the experimental observations,this shows clearly that the spectrum levels,which do not exist for the standardized crystal-field theory,are due to the dynamic Jahn-Teller effect in those crystals. Some theoretical Jahn-Teller effect splittings presented,which are not found in exising experiments,are in need of further theoretical and experimental studies.
理论计算的结果与实验符合得很好,说明了在该物质中用经典晶体场理论无法解释的红外谱线,的确是由Fe2 和Cr2 离子与半导体晶格之间的动态阳-泰勒效应所产生;并且理论计算还预示存在一些新的谱线有待实验和理论工作者的进一步验证。
- 推荐网络例句
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The split between the two groups can hardly be papered over.
这两个团体间的分歧难以掩饰。
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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。
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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