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Based on varying process of generator terminal parameters after excitation fault, shortages of excitation protective principle of static stability boundary and asynchronous impedance boundary are analyzed. It proposed that excitation fault research relates to large-disturbance stability. Because dynamic power-angle character of generator after excitation fault is non-sinusoidal, there are differences between dynamic power-angle character and static state power-angle character. So it isn't ideal to protective operation result based on small-disturbance stability and static stability boundary criterion. At the same time, it proposed that asynchronous boundary impedance criterion is a constant reactive power circle moving adown j Xd′. It can ensure complete loss-of-excitation generator measuring impedance enter into the circle, but can't ensure the other condition measuring impedance including impossible losing synchronism enter. So loss-of-excitation protection would be maloperation when system voltage drops short and recovers or generator rejects load.③Based on stability principle, it puts forward setting conditions and calculation method of generator loss-of-excitation protection by direct measuring power-angle.

以励磁故障后发电机端的相关参数的变化为基础，通过对以静稳定边界和异步阻抗边界作判据的两类三种现行励磁保护在原理上存在的缺陷分析，发现：励磁故障是一个大干扰稳定性问题，励磁故障后的发电机的动态功角特性与静态功角特性有很大的差异，已远非正弦曲线，因此基于小干扰稳定性原理、以静稳定边界作判据的保护必然动作不理想；异步边界阻抗判据是一个下移j Xd′的等无功阻抗圆，它可以保证完全失磁后的发电机测量阻抗能进入该阻抗圆，但不能保证完全失磁之外的其它状态不会进入该阻抗圆，因此在系统电压短时下降或发电机突然甩负荷等情况下可能启动该保护使之误动。

One of the most common conditions to occur in ferrets is adrenal disease.

其中最常见的条件，发生在雪貂是肾上腺疾病。

This text studies technology conditions and mechanism of adsorb - oxide technology dealing with the light polluted water.

本文研究了吸附-氧化技术处理轻度污染水体的工艺条件和机理。

Under the conditions without air, oxygen may adsorb on the I-modified surface of electrolytic silver.

在甲醇和氧共吸附的情况下，表面可以检测到甲氧基和甲酸根。

One may also adjust the conditions to monitor the desorption of adsorbate from the catalyst.

也可以调节条件以检测催化剂上吸附质的解吸。

Breakthrough curves at different conditions such as flowrate, adsorbate concentration and temperature were obtained.

比较了该体系在3A、4A沸石上动态吸附的差别以及流量、吸附质浓度、温度对动态穿透曲线的影响。

The study of adsorption behaviour of ZSM-5 at the catalytic reaction conditions especially when dealing with multicomponent adsorbate system is very difficult.

对ZSM-5沸石在催化反应条件下吸附行为的研究、特别是对涉及多组分吸附物体系吸附行为的研究是很困难的。

Research in different living conditions of the adsorption clays performance.

研究在不同条件下改性膨润土的吸附性能。

Adult-oriented colleges are restricted in their survival and development by various internal and external factors such as environment, opportunity, school conditions and faculty. Among the factors, a faculty of a high level is the key determining an adult-oriented college's strong vitality and healthy development.

成人高校的生存和发展受环境、机遇、办学条件、师资队伍等内外多种因素的制约，其中是否有一支高水平的师资队伍则是成人高校是否具有较强的生命力、能否得到健康发展的关键。

Article 37 Where a purchaser modifies the conditions for the takeover offer within the effective term of the takeover offer, the purchaser shall submit a written report to the CSRC in advance, represent a copy of the report to the office under the CSRC located in the place where the listed company lies, send a copy of the report to the stock exchange, and notify the company to be taken over; no implementation shall be effected, and no announcement shall be made without approval by the CSRC.

第三十七条收购人在收购要约有效期限内更改收购要约条件的，必须事先向中国证监会报送书面报告，同时抄报上市公司所在地的中国证监会派出机构，抄送证券交易所，通知被收购公司；经中国证监会批准后，方可执行，并予以公告。

Neither the killing of Mr Zarqawi nor any breakthrough on the political front will stop the insurgency and the fratricidal murders in their tracks.

在对危险的南部地区访问时，他斥责什叶派民兵领导人对中央集权的挑衅行为。

In fact,I've got him on the satellite mobile right now.

实际上 我们已接通卫星可视电话了