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The study has focused on: 1 The research background and the current state of the power measurement were analyzed systematically, and then wavelet-based power measurement algorithm was certified feasible for astable signals; 2 We developed a new method of RMS and power measurement based on Dmeyer wavelet. After that three other wavelet measurement approaches were compared with Dmeyer wavelet-based measurement approach. Then the impact on measurement errors of amplitude frequency property and energy leakage of wavelet filter banks were deeply researched, and some measures were proposed to reduce it; 3 We developed a new strategy of power measurement algorithm based on lifting wavelet, which had calculation advantage compared with the first wavelet, so that it was more suitable for the realization of hardware; 4 The running system of wavelet-based power measurement algorithm based on DSP was proposed, and then it was realized on ICETEK-VC5416-A EVM board; 5 Existing problems and the further research direction of wavelet-based power sub-band measurement algorithm was discussed.
本文对基于小波变换的功率测量算法展开深入的分析研究,主要内容有:1)系统地分析了功率分解测量的研究背景、国内外的研究现状,并从能量守恒的角度验证了小波功率分频带测量算法在非平稳信号条件下的可行性;2)首次提出了Dmeyer小波变换有效值与功率的测量方法,进而通过对该方法与3种已经提出的小波测量方法的对比分析,深入研究了小波滤波器组的幅频特性和能量泄漏特性对测量误差的影响,并针对电网谐波的特点提出了减小影响的相关措施;3)首次提出了二代小波功率测量算法,对比一代小波功率分频带测量算法,它大大减少了算法实现的运算量及内存的需求量,从而更适合于硬件的实时实现;4)提出了小波功率分频带测量算法的DSP实现方案,并在ICETEK-VC5416-A EVM板上进行了实现;5)探讨了小波功率分频带测量算法目前仍存在的问题,并提出了进一步的研究方向。
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Then, based on temperature prediction program and field study of the temperature on early-age characteristics of PCCP, and early-age temperature impact on the PCCP early and long-term performance and finally provide temperature on early-age of PCCP control methods and measures, detailedness as follows: 1、According to early-age of PCCP characteristics of heat exchange, Determine the the optimal models of factors of PCCP early-age temperature impacted.
本文首先基于有限差分数值分析研究了水泥混凝土路面早龄期温度场的预估方法;然后基于程序和现场试验研究了水泥混凝土路面早龄期温度场特征、早龄期温度场对路面早期和长期性能的影响,最后研究提出了改善路面性能的早龄期温度控制方法和措施。
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The fourth part gives a scientific evaluation on the two natural education ideals: on one hand, the ideals are explosive in human thinking and have huge impact on the development of future education thoughts; on the other, they are limited in transcendental premise, unilateral personality and social illusiveness.
第四部分对两者的教育思想作出了科学评价:老子与卢梭的教育理想既有思想上的开拓性,对后世教育理论产生了重大的影响;又具备局限性——理想前提的先验性、理想个人的片面性、理想社会的虚幻性。
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In this paper the importation of translations that the value orientation of personnel, organization and personnel employment orientation towards the mobile space changes focusing on concepts, organizations, systems, cultural, and social aspects of China's human impact on the flow of major issues, from the political, economic, cultural, market, environment etc., the promotion and protection of the rational flow of talents to deal with comments and suggestions, as follows: In politics, setting up the political sense of talent with the progress of time spirit, implementing roundly the strategy to strengthen nation by relying on talent, establishing quickly the system to manage talent and reforming the system of personnel; In economy,talent flow corresponding with economic construction, assorting talent's structure with economic structure, paying attention to the economic benefit from talent flow, quickening to construct the social welfare system of talent, founding the flexible system of employment and reducing the cost of talent flow; In culture, stressing on the functions of culture for talent flow, cultural model corresponding with the model of talent flow, sparking plug the excellent culture to facilitate talent flow and erecting the cultural system to motivate talent flow; In marketing, unifying the thinking to developing talent market, enhancing the construction of talent market and fastening the growth of service agency for talent; In surroundings, grasping the elements of talent surroundings, optimizing the circumstance of talent flow and building the condition to look after the security of talents.
本文指出了人才价值取向、组织用人取向和人才流动空间走向的变化,着重从观念、组织、制度、文化、社会等方面具体分析了影响我国人才流动的主要问题,从政治、经济、文化、市场、环境等方面研究,提出了促进和保障人才合理流动的意见和建议,包括:树立与时俱进的人才政治理念,全面实施人才强国战略,加快构建人才领导体制,改革创新人事制度等政治对策;人才流动与经济建设对应,人才结构与经济结构协调,讲求人才流动的经济效益,加快人才社会保障体系建设,建立灵活的就业体制,降低人才流动的经济成本等经济对策;注重文化功能对人才流动的作用,倡导促进人才流动的优秀文化,构建激励人才流动的文化机制等文化对策;统一人才市场发展思路,突出人才市场建设重点,加快人才服务业的成长等市场对策;优化人才流动环境,构建人才安全环境等环境对策。
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Firstly,the sampling design has great impact on the accuracy of remote sensing classification.There exists great randomicity on the result of points and cluster sample verification on the different Sampling design.On the same sampling design,the stability of point sample verification is higher than that of Cluster sample verification.Secondly,the average accuracy of different sampling designs of multi-point and multi-cluster sample verification can reflect the accuracy characteristic.During the course of point sample verification,stratified sampling's error is lower than others'.During the course of cluster sample verification,systematic sampling and stratified sampling's accuracy are prior to simple random sampling's.
研究结果表明:(1)抽样方式对遥感分类精度评价结果的影响是客观存在的,不同抽样方式下的点样本和群样本检验结果都存在一定的随机性,但同一种抽样方式下,点样本检验精度评估结果的波动幅度小于群样本检验,稳定性比群样本检验要好;(2)不同抽样方式下的多次点样本和群样本检验的平均精度检验结果基本上都能够反映分类图像的精度特征,其中,点样本检验中,分层随机抽样点样本检验效果较好;群样本检验中,系统抽样群样本检验和分层随机抽样群样本检验的效果优于简单随机抽样群样本检验。
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At first in the preliminary design this paper computes the linear damping coefficient of the viscous damper employed in this project using Composite Response Spectra approach, meantime, this paper proves that reducing the exponent of velocity of the piston can increase the magnitude of the dissipative energy, because of the viscous damper employed in the practical project character nonlinear behavior; next this chapter performs analysis and comparison between the building without and with the viscous dampers aforementioned when the building suffers from various Time Domain Response, from the angle of displacement, interstroy drift, velocity, interstory velocity, acceleration, energy, maximum axial force of the dampers and of the column etc., in order to prove that the incorporating the viscous dampers into the buildings has great superiority on enhancing its aseismic performance ; furthermore, this chapter also expatiates on diverse assembly form of the viscous dampers that results in the adverse impact on the internal force of the structural member in this building, on the ground of which this segment bring about the preference of the assembly form of the viscous damper; finally this chapter points out the sphere of application of the analysis and computation using Composite Response Spectra approach in design: it is available in well-proportioned stiffness structures and isn抰 available in the structures that contain weak story. It is recommendable, particularly, to incorporate the fluid viscous dampers into this structure that contain weak story to refrain earthquake and reinforce, such as the Central Hall of Shanghai Exhibition Hall.
首先使用了反应谱分析法设计出欲附设的粘滞阻尼器的线性阻尼系数,由于实际工程所用的粘滞阻尼器具有非线性的特性,故而笔者又证明了降低速度指数对提高粘滞阻尼器的耗能量的优势所在;接着分别从位移、层间位移、速度、层间速度、加速度、能量、最大阻尼出力和柱轴力等不同的角度对结构在附设粘滞阻尼器前后的时程反应进行了分析对比,籍此在实际工程中证明了附设粘滞阻尼器对于提高结构的抗震性能的优越性;再者,笔者还阐述了采用不同的粘滞阻尼器布置方式对结构中构件内力特别是柱轴力和基座竖向反力产生的不利影响,并在此基础上提出了布置方式的优选;最后,指出了反应谱法在设计中的适用范围:对于均匀结构反应谱法能够使用,而对于含有薄弱层的结构反应谱法并不适用;对于类似于上海展览馆中央大厅的含薄弱层的结构尤其值得使用粘滞阻尼器的方法进行抗震加固。
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We find:(1) ITB cumbers the optimization of enterprises' scale through increase the trade cost;(2) The rate of ITB on inter-industrial products is higher than on the intra-industrial aspect, and the product's trade barrier has a decreasing situation;(3) From the macro-economics view, the behaviors of governments have grave influences on the integration of domestic market; taxation system and regional law system have great impact on the many aspects which influence the development of economy.
微观方面,区际贸易壁垒通过影响企业成本控制,阻碍企业最优规模的实现,并对产业集聚的发生造成随机性影响。同时,产业间层次上的制成品贸易壁垒比重大于要素贸易壁垒,而制成品相对要素的区际贸易壁垒(无论产业间还是产业内层次)有下降的趋势。宏观方面,政府行为对于区际整合有着重要影响,财税制度和规制建设在转型经济中对地方分割等影响经济增长的众多方面造成影响。
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Cylinder, the cylinder sets of radial a surplus deformation of the cylinder sets a great impact on the cylinder liner reduced radial a surplus amount to reduce the deformation of the cylinder sets, the top surface of the body decreases roughness, but it will increase the body on the plane cylinder only mouth the roughness ; Preload reduced cylinder head bolt deformation of the cylinder liner little effect, the body can reduce the top surface roughness and cylinder body on the plane I ended roughness; Shen appropriate reduced cylinder head bolt hole deep can reduce the deformation of the cylinder sets, but will cause the body and the top surface roughness on the cylinder body only I roughness increases Plane .
工作工况下,对于第2缸来说,气缸套径向过盈量对气缸套变形影响很大,减小气缸套径向过盈量,有利于减小气缸套的变形,减小机体顶面不平度,但会增大机体上缸套止口平面的不平度;减小缸盖螺栓预紧力对气缸套变形影响很小,可减小机体顶面不平度和机体上缸套止口平面的不平度;适当减小缸盖螺栓沉孔深可以减小气缸套的变形,但会造成机体顶面不平度和机体上缸套止口平面不平度的增大。
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The results show that coal and gangue are involved in the microbial role; the quantity of inoculums is directly related to the quantities of gas and the contents of methane, at the same time it has a certain degree of impact on the contents of NO(superscript - subscript 3)-N, NH(superscript + subscript 4)-N, S(superscript 2-), SO(superscript 2- subscript 4), and metals; moreover, because of the microbial anaerobic fermentation, the contents of NH(superscript + subscript 3) are seriously substandard; overall, the group B which has a smaller proportion of gangue has a less impact to the environment compared to the group A which has a larger proportion of gangue.
结果表明:煤、煤矸石参与了微生物作用;接种物的加入量与产气量和甲烷含量密切相关,并对硝酸盐氮、氨氮、硫化物、硫酸盐和金属也有一定程度的影响;同时由于微生物厌氧发酵的关系,氨氮严重超标;矸石比例较小的B组对环境的影响略小于矸石比例较大的A组。
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Research on reference consultation service system based on knowledge management;2. The scries change of the domains in information service instruments,service contents and modes of acquire information and so on under the network environment made great impact on traditional work modes of library reference consultation service.
网络环境下的信息服务手段,服务内容及信息获取方式等领域的一系列变化,给图书馆参考咨询服务工作的传统工作方式带来了巨大的冲击,本文就网络环境下高校图书馆参考咨询工作面临的问题,对网络环境下高校图书馆参考咨询服务进行了一些探索。
- 推荐网络例句
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The concept of equivalent rotationally rigidity is offered and the formula of rotationally rigidity is obtained.
主要做了如下几个方面的工作:对伸臂位于顶部的单层框架—筒体模型进行分析,提出了等效转动约束的概念和转动约束刚度的表达式。
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Male cats normally do not need aftercare with the exception of the night after the anesthetic.
男猫通常不需要善后除了晚上的麻醉。
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Its advantage is that it can be used in smaller units.
其优点在于可以在较小的单位中应用。