查询词典 inverse circular function

The inverse acoustic scattering problem is an important branch of the research of the inverse problems.

声波反散射问题是反问题研究领域的一个重要分支。

In developing such a notion, Newton perhaps had associated some well-known representation (e.g., the light intensity from a radiant objectwas already known to fall off as the inverse square of the distance), and applied it into the field of gravity so as to put forward the inverse square law of gravity as a falsifiable hypothesis.

在建构此观念的过程中，牛顿很可能联想到某种已有的表象（例如，点光源辐射强度随距离递减的平方反比律），并以可证伪的假设形式把它移植到引力情形中来而提出引力的平方反比律。

Using the dynamic model of the induction motor drive system , the inverse system's existence is proved, and the input-output equation of the inverse system is presented.

根据异步电动机调速系统的动态数学模型，证明了其逆系统的存在性，在此基础上得到了逆系统的输入输出方程。

It is crucial to establish the inverse dynamic process model of thermal system on research and application of the inverse dynamic process of thermal system.

建立热力系统逆动力学过程模型是热力系统逆动力学研究及应用的关键。

ABSTRACT A robust control system design method via model reference and inverse system theory is presented in this paper,and compared with the model reference adaptive approach and the inverse system design method.

摘 要 给出了一种基于模型参考最优化方法和逆系统设计方法的鲁棒控制系统设计方法，并将其同模型参考自适应方法和逆系统方法进行了比较。

Furthermore, combing SVNN method with adaptive inverse control method, this paper proposes a new adaptive inverse control method for nonlinear system.

其聚合过程对温度及温度变化反应灵敏，给系统的建模和控制提出了较高的要求。

Firstly, the strict-feedback nonlinear systems with unknown virtual control coefficients bi have been studied and the problem of its inverse optimality has been solved, that isThe new solvable theorem of inverse optimal gain assignment problem has been proposed through the method of modular design for the original system.

本论文的内容安排如下：第一部分把上述严格反馈系统进一步推广为具有未知虚拟控制系数bi的严格反馈系非线性统并研究其逆最优问题，即第二部分对于推广之前的系统利用模块设计方法提出新的逆最优增益配置定理。

Chapter 5 deals with the solvable theorem of adaptive inverse optimal control problems for a class of stochastic nonlinear systems driven by Wiener noises of unknown covariance. The systems are depicted by It〓 stochastic differential equations. By using an adaptive backstepping algorithm and stochastic control Lyapunov functions, the designing procedure of control laws of global asymptotic stability in probability and adaptive inverse optimal stabilization in probability are presented systematically. Adaptive control laws and parameter update laws can be obtained at the same time by this design scheme.

在第5章中，针对具有方差不确定Wiener噪声扰动和未知定常参数的随机非线性系统（假设方差的F—范数是一个常数或一个缓慢变化的量，对其进行在线辨识），给出并证明了自适应逆最优控制问题可解定理，基于随机Lyapunov定理和It〓微分规则，采用自适应Backstepping设计方法，系统地设计了全局依概率渐近稳定和自适应逆最优控制策略，这种设计方法可同时获得控制策略和自适应律，计算机数值仿真结果表明该控制算法是有效性的。

According to the results of empirical study, current relative corporate value is in inverse proportion to asset return ratio and asset liability ratio,and in direct proportion to equity interest and long term/short term liabilities;the growth potential of corporate value is in direct proportion to asset return ratio,and in inverse proportion...

实证结果表明，我国上市公司当前的相对价值与公司的资产报酬率以及资产负债比呈反比，而与公司的股东权益比、长短期负债比成正比。公司的价值成长能力与公司的资产报酬率成正比，而与公司的资产负债比、股东权益比、长短期负债比成反比。

The second part(Chapter 4,Chapter 5 and Chapter 6)is devoted to freeboundary problems(inverse boundary value problems or geometric inverse prob-lems)for elliptic systems of partial differential equations in continuum mechanics.

第二部分(即第四章、第五章、第六章)讨论力学中椭圆型方程组的自由边界问题(也称逆边值问题或几何反问题)及数值分析，主要涉及到渗流与气体动力学中的一些问题。

Although translator has turned from being a crystal ball by which the original culture can unrestrainedly penetrate to another crystal ball by which the target culture can freely traverse, the translator's personal embodiment, in the process of cognitive act, are still absent in translation studies. Translators are still subjects without body or simply disembodied subjects.

译者虽然由原语文化可以自由穿透的玻璃球变成了译语文化可以自由穿越的玻璃球，但译者认知过程中的个体体验在翻译研究中依然缺席，译者依然仅仅是一个没有躯体体验的主体。

Chillingly, he claimed our technology is 'not nearly as sophisticated' as theirs and "had they been hostile", he warned 'we would be been gone by now'.

令人毛骨悚然的，他声称我们的技术是'并不那么复杂，像他们一样，和"如果他们敌意"，他警告说，'我们将现在已经过去了。