查询词典 difficult problem

One of the interesting and difficult problems in recent reinforcement learning is to solve large-scale state space problem.

大状态空间值函数的激励学习是当今国际激励学习领域的一个热点和难点问题。

ABSTRACT Using statistical estimate to monitor regional economic development has proved a vital and difficult problem in the study of regional economy.

区域经济协调发展统计测度问题既是区域经济研究中的一个重点问题，也是一个难点问题。

Ambiguity Study of Syntactic Function in Phrase with Identical POS in Contemporary Chinese for Information Processing Abstract Ambiguity is a difficult problem in linguistics. It has long been a focus of research in natural language understanding and machine translation too. In 1960 Bar-Hillel said that ambiguity is a main stumbling-block in natural language processing.

面向信息处理的现代汉语同类词短语句法功能歧义研究歧义问题是语言学中的一个难点，也一直是自然语言理解和机器翻译中难以解决的问题。1960年巴尔一希列尔就曾说过歧义是自然语言处理中的主要绊脚石。

It is a difficult technical problem how to improve and enhance the quality testing technique and method in subgrade construction.

如何改进和提高路基施工过程中的质量检测技术和方法是当前的一个技术难题，亦是路基施工中亟待解决的主要问题之一。

A novel robust design method of cascade control system is proposed for the reheated steam temperature control system of 300MW power-unit in Yuanbaoshan Power Plant. The method successfully solves the problem that the design of main loop and subloop interact each other and the parameter of the controller is difficult to be tuned.

本文所作的主要工作如下：结合带偏置的继电反馈辨识方法和基于期望幅相裕度的整定方法，设计了一个简单有效的、易被工业过程采用的自整定PID控制器。

To detect a moving point target that is submerged in noisy background is a very difficult problem.

要把淹没在噪声背景中的运动点目标检测出来是一个十分困难的问题。

In view of the key problem of subminiature underwater robots, structural improving,control algorithm and underwater experiment is studied. They can be described as follow: Firstly, the subminiature underwater robot should be compact in size and low cost, for which, it is difficult for us to control its balance. So that, a new kind of piston--style ups and downs system was invented, which can keep the underwater robot horizontally suspended in the water without driving force.

中文摘要本文针对超小型水下机器人在运动中存在的问题，设计了一种新的超小型水下机器人的沉浮结构形式，着重研究了其运动学动力学性能、探讨了相应控制算法、进行了水下试验，具体研究内容如下：首先，超小型水下机器人由于体积小重量轻，在水中沉浮时悬停平衡控制困难，为此进行了一种新的活塞式沉浮系统设计，该系统使水下机器人能够在无动力驱动的情况下，使其呈水平状态稳定悬浮在水中。

Supercalender velocity drop always is a control difficulty of electricity control technology, and it is difficult to solve the problem of velocity drop by common arithmetic.

陕西科技大学电气与信息科学学院，陕西西安，710021

For these systems, that how to achieve synchronization is a difficult problem.

对于这些混沌系统，如何实现同步是一个较困难的问题。

How to spend " cold winter " will be the difficult problem that is placed before all medium and small businesses, the expert points out, medium and small businesses should choose as early as possible the most appropriate oneself take off tired method, realize the breakthrough of oneself and transition.

如何度过"寒冬"将是摆在所有中小企业面前的难题，专家指出，中小企业应尽早选择最合适自己的脱困路径，实现自身的突破和转型。

Pachomius manual labour was organized as an essential part of the monastic life; and since it is a principle of the monks as distinguished from the mendicants, that the body shall be self-supporting, external work of one sort or another has been an inevitable part of the life ever since.

根据圣pachomius体力劳动组织作为一个重要组成部分寺院生活；以来，这是一个原则的和尚，作为有别于乞丐，该机构应自支撑，对外工作的这种或那种已一个必然的一部分，生活至今。

In order to study the effects of parametrical rolling on the ship movement and tilts, in allusion to ship's navigating in regular following waves, the equation of ship rolling motion is transformed into normal Mathieu equation by proper variable replacement when strong parametrical excitation in restoring moment varied according to sine or cosine wave.

为研究参数横摇对船舶运动和倾覆的影响，通过对船在规则波上随浪航行时，恢复力矩中出现的1个以正余弦规律变化的强参数激励项进行适当的变量置换，将船舶的横摇运动方程转换成标准形式的Mathieu方程。