查询词典 performance evaluation

The new method is given to design the optimum profile modification curve design The effects of optimum profile gear in improving the dynamic performance of gear transmission are verified in the Gear Dynamic Performance Test Rig In this dissertation, the main study contents and creative results are shown as following: The influences on the gear transmission system caused by the gear's accumulated error (periodic error and harmonic error) are theoretically studied. A new method is developed to simulate the gear's harmonic error by using the 2-order MARKOV process A simulated model of the dynamic performance which is excited by the gear's accumulated error is obtained.

本文在前人大量研究的基础上，结合作者承担的国家自然科学基金项目"齿轮传动动态系统辨识与三维修形研究"和山东省自然科学基金项目"齿轮传动动态性能仿真及结构参数、齿形的优化修形"，采用理论和试验相结合的新思路，系统地研究了齿轮传动的动态性能，建立了能正确描述齿轮传动系统动态性能的仿真模型和系统辨识模型，给出了确定齿轮传动轮齿修形曲线的优化设计方法，利用自行研制的齿轮传动动态性能试验装置，验证了优化修形齿轮对提高齿轮传动动态性能的突出作用。

The performance of film images can be divided into the performance of static painting lattice and the PHI phenomenon of painting lattices.As for the research on the performance of static painting lattice, it should make reference of the relationship between the sun, and the main body of paternity, the main background of the relations between viewers and painting, the main characters include the size, shape, color, sense of space and so on.

在对静态画格的表现力研究时，根据画框与主体的关系，主体与陪体的关系、主体与背景的关系以及观众与画格的关系，主体本身的性质：大小、形状、色彩、空间感等因素，分别对画格的构图的表现力、景别的表现力、角度的表现力进行研究，把运动镜头整合为两个大的类别，分析了这两类运动镜头的表现性；最后，建立一个模型来论证，一部影片的表现性是在大量的具有表现力画格感应出一个表现力场的过程中完成的。

In order to avoid the limitation of using only Tobin's Q to evaluate marketing performance and return on equity to evaluate financial performance, this paper introduces factor analysis to calculate synthesized performance, successfully processing totally 12 original indexes, such as return on net sales, average return on equity, return on total assets, per share earning ratio, current ratio, quick ratio, debt to assets ratio, rate of stock-turn, accounts receivable turnover, total asset turnover, main business growth rate, and total assets growth rate.

为了避免单纯使用托宾Q值度量企业市场业绩以及使用净资产收益率等单一财务指标度量企业财务业绩的缺陷，该文运用了因子分子法求得上市公司的综合绩效，成功地对总共12个原始绩效指标，如销售净利率、平均净资产收益率、总资产报酬率、每股收益、流动比率、速动比率、资产负债率、存货周转率、应收账款周转率、总资产周转率、主营业务收入增长率以及总资产增长率等进行了处理。

Convention V-belt Continuously Variable Transmission, shifts gears the travel mechanism property fixed constraint, unable full into full play initiative control advantage, to engine and Transmission on the go to hold optimum match, Also takes into consideration acceleration and fuel consumption performance, so this paper research Motorcycles with an Electronically-Controlled Continuously Variable Transmission shift gears planning, to use motor power screw, we shall revolve motion changes rectilinear motion, to push driving sheaves achieved to change speed ratio; Comparison between analysis convention CVT speed ratio shift gears curves of acceleration and fuel consumption performance optimum curves, use engine can hold high performance output or low fuel consumption region run.

中文摘要传统皮带式无段变速器(Continuously Variable Transmission， CVT)，换档行程由於机械特性的限制，无法完全发挥主动控制的优点，让引擎与变速器随时保持在最佳的匹配状态，同时顾及加速性能与燃油消耗，所以本文主要研究机车用电子控制式无段变速系统(Electronically Controlled Continuously Variable Transmission， ECVT)最佳换档规划，利用马达与动力螺杆，将旋转运动改变为直线运动，以推动主动滑轮达到改变减速比；分析传统CVT减速比换档曲线与最佳化曲线之加速性能及燃油消耗比较，使引擎能够保持较高性能输出或较低油耗区间运转。

Ii The performance assessment benchmark of model predictive control system is studied. The Cumulative Sum chart of residual is put forward to monitor the performance of model predictive control system online. The method has solved the problem that the- chart can hardly detect the change of performance index with small change or severe autocorrelation.

2介绍了模型预测控制系统的性能评价准则，提出了利用残差的累积和图在线监视模型预测控制系统性能指标的方法，解决了传统的-图很难在线检测出变化不大或存在严重自相关现象的性能指标变化的问题。

Iv Case studies with model of a Shell tower is made to test the method of model predictive control performance assessment. It illustrates that the Cumulative Sum chart of residual can monitor the model predictive control performance online effectively. Historical and design performance index can distinguish the type of root cause correctly.

4利用Shell塔模型对模型预测控制性能评价的方法进行了仿真研究，通过仿真表明，残差的累积和控制图可以有效地在线监视模型预测控制系统的性能，历史性能和设计性能指标相结合的方法可以准确地识别出原因类型。

Parallel processing characteristic of the Residue Number System is display a high "area × power × delay" performance in VLSI. Modulo adder is one of the basic units in RNS, meanwhile, its performance has decided the performance optimization of the Residue Number System.

余数系统中的并行处理特性在VLSI系统中表现了很好的"面积×功耗×时延"特性，而模加法器作为构建RNS系统的基本单元之一，其性能决定了余数系统的性能优化。

In the long term, the performance methods and values of the early music revivalist, particularly what became known as a quest for ' authenticity ' had a permanent effect not only on early music performance, but also on the performance of music from later periods.

长远看来，早期音乐复兴者的表演方法与价值观，尤其是渐渐为人所知的对"本真"的追求，不仅仅长久地影响了早期音乐的表演，也对后世音乐的表演产生了影响。

This paper makes a through investigation on the performance of HAT cycle, including the performance of the saturator and the part-load performance of HAT cycle.

本文在归纳总结国内外学者研究成果的基础上，对HAT循环的流程及其变工况性能进行了系统的研究，并从理论及实验两方面对饱和器的性能进行了较为全面的分析研究。

Through a filter experimentation on a typical scalar quantity non-linear system, we made a comparison of the performance on these algorithms, and the results showed that these improved algorithm improve the performance of particle filter in different degree, and the UPF has the best performance.

通过对一典型标量非线性系统的滤波实验，对4种改进算法的性能进行了仿真比较，实验结果表明，4种改进算法都从不同程度上改善了粒子滤波器的性能，其中，UPF的性能最优。

The role of the environment is very important.

的作用，环境是非常重要的。

At that time, the High Court of England and Wales Court of Queen's Bench president of William Murray, Lord Mansfield in June 22, 1772 ruling:"No matter then there is the inconvenience, but there must be a decision, I can not say that this case under the law in England are permitted or authorized; are so black should be released."

当时的英格兰及威尔士高等法院王座法庭院长William Murray， Lord Mansfield于1772年6月22日宣判：「无论有那麽不便，但总要有个决定，我不能说这件案在英格兰法律之下是准许或认可；所以黑人是应该被释放。