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Considering the inconvenience of regulation and difficulty of parameter tunning as AC servo system in practical situation, three ways of intelligent control approach to realize auto-tuning and autorecognization of AC servo system, are proposed, which is a robust controller based on two-degrees-offreedom with no tuning to controller, a auto-tuning controller based on fuzzy reasoning with no inertia recognization but tuning parameter of controller, a strategy recognizing inertia of servo system and tuning parameter or structure of controller automatically. In the same time, these control strategies are analyzed from the theory and reliability. The comparative analysis of three measures on strong and weak points is made by simulation and experiment results.

针对交流伺服系统在实际应用中存在的系统调试不便、参数调整困难等问题，提出了实现交流伺服系统自调整和自识别等智能化控制策略的三条途径：一是具有控制器无调整特点的二自由度鲁棒性控制器；二是惯量无识别但需自动调整控制器参数的模糊推理自调整控制器，三是自动识别伺服系统转动惯量并自动调整控制器参数和结构的方案，从理论分析和可实现性两方面对这些控制方案进行了论述，并通过仿真和实验研究，对比分析了各种方案的优缺点，得到了一些有益的结果。

The difficulty buyers have in getting such information results in frequent ownership wrangles after deals are completed.

交易完成之后，买家在获得如此信息中遇到的困难归于所有权的频繁争议。

The difficulty buyers have in getting such information results in frequent ownership wrangles after deals are completed.

如果购买方很难得到相关的信息的话，就会在交易结束的时候才发现产权的归属并不清楚，从而引发纠纷。

Firstly, a new design method of cam profile has been developed by using finite terms of Fourier Series in the cycle of cam angle as the basic equation of cam profile, so the difficulty of base circle wave existing in the method of resonant cam design can be eliminated. On the other hand, the method proceeds from the acceleration of cam profile, which makes the acceleration not only smooth and continuous, but also easy to be controlled, and the cam profile with good performance can easily be acquired.

此方法用以凸轮包角为周期的富立叶级数有限项作为凸轮型线的基函数，可以免去谐波凸轮设计时控制基圆波动的困难；此方法又是从凸轮型线的加速度曲线入手进行设计，使型线加速度不但光滑、连续，而且形状容易控制，便于设计出动力性能优良的凸轮型线。

In the process of making a knowledge base, Fault Tree Analysis is one of effective methods to analyze problems of complicated system, which can reduce the difficulty of obtaining system knowledge in failure diagnosis expert system for pressure vessels.

在知识库的建造过程中，故障树方法是分析复杂系统失效问题的有效方法之一。

In the process of discussing efficiency of each channel, it finds that because high-tech SMEs has the character of high-invest, long term to withdraw the invest and high-risk, traditional direct and indirect channels have difficulty in meeting their financing need, only venture capital and second board are best channel for them.

在对各融资渠道展开探讨的过程中，认识到高科技中小企业由于自身规模小而投资高、投资回收期长、风险高的特点，传统的直接与间接融资渠道很难满足其需要，风险投资与二板市场才是高科技中小企业的天生伙伴。

Although the research works of coal chemistry are facing up to difficulty, it is sticked to and developed in many countries on account of the stable status and fine prospect of coal in energy resources.

由于煤炭在能源中的地位稳固、前景良好，煤化学研究虽然面临困难，但各国仍在坚持和发展。

If there have dead wood on the way of life, please change it into torch with your hands. If there are alpines in front of life, please use your feet to measure its height. If there have great rivers to obstruct life, please use your head to build a boat to cross over. In the process of struggling with difficulty, life brilliance is known through learning or by experience.

如果生命道路上有荆棘，那就让它变成守家护院的篱笆墙；如果生命之路上有枯枝，那就用你的手把它变成火炬，让其在黑夜中噼里啪啦的从头烧到脚；如果生命的前方有高山，那你就用脚去丈量它的高度，如果生命的道路上有大河阻拦，那你就用你的智慧搭建一叶小舟去横渡它……这样，在不断与困难做斗争的过程中更加体会到了人生的精彩。

The graphitizing is the key craft that the carbon enterprise produces the products,its factory the beton starts construction in winter the difficulty is bigger,the engineering quantity will affect directly the graphitizing prduct craft requests and the equipments to install a series of problem in etc.

石墨化是炭素制品企业生产产品的关键工序，其厂房砼冬季施工难度较大，工程质量的优劣将直接影响到石墨化产品的工艺要求和设备安装等一系列问题。

To overcome the difficulty , Hongkong government took many measures. For example , brooklets and wells were used ; pools were built , seawater was desalted , and the East River in Guangdong Province was diverted to Hongkong. Water supply problem in Hongkong has almost been solved.

为解决供水问题，香港政府采取过许多措施，例如，利用溪涧和井泉之水，修建水塘，淡化海水，引东江水入港等，最后基本上解决香港的用水问题。

But we don't care about Battlegrounds.

但我们并不在乎沙场中的显露。

Ah! don't mention it, the butcher's shop is a horror.

啊！不用提了。提到肉，真是糟透了。