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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。
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Some people think that the use of computers or the use of less time is short, life can be extended Zhang computer, which is one-sided and ambiguous point of view; the other hand, not computer a long time, because of humidity or dust, perspiration and other reasons, can cause damage to computer parts .
有人认为使用电脑的次数少或使用的时间短,就能延 Zhang 电脑寿命,这是片面、模糊的观点;相反,电脑长时间不用,由于潮湿或灰尘、汗渍等原因,会引起电脑配件的损坏。
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What I hope to demonstrate in this essay is that Derrida's short book on the themes of language and death entitled Aporias: Dying-Awaiting the Limits of Truth should be read as yet another installment in the series of works dedicated to the question of the animal, and furthermore that it is with respect to theme of animality in particular that we can begin to discern Derrida's unique position in contemporary theory with regard to the key motifs of finitude, language, and relation.
我在此文中所要证明的是德里达那本关于语言与死亡主题的非常精练的书作,名为《难题:死亡-等待于真理的界线》应该被看作是这一系列工作中的一部分,关于动物问题,以及更进一步由此关于动物性或动物界的主题出发来洞察德里达在当代理论关于界限,语言与其间联系等主题的独特立场。
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Although the influence of price factors, the actual investment in China this year the growth rate has declined, but continued growth in investment demand is still great potential for investment growth is not because of the long-term driving force and the apparent attenuation of short-term adjustment, there should be no substantial decline in the growth rate of investment situation.
尽管受价格因素影响,今年以来我国投资实际增速有所下降,但投资需求持续增长的潜力仍然很大,投资增长的长期动力没有因为短期调整而明显衰减,因此不会出现投资增速大幅下滑的局面。
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By looking up lots of datum, is built on an architechure of ASP and Access, using IIS as web server, programing with VB script and non-process query languge SQL.By logging on this system , because of its objective tools in Win32. It can give you a short-cut to build up a prototype of system application. The prototype could be modified and developed till users are satisfied with it.
经过分析,我们使用了基于 IIS 的 ACCESS+ASP相结合的动态网页技术,并运用 VB Script 脚本语言和非过程化查询语言 SQL 语句,利用其提供的各种面向对象的开发工具,首先在短时间内建立系统应用原型,然后,对初始原型系统进行需求迭代,不断修正和改进,直到形成用户满意的可行系统。
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C. the amount of a short-term investment acquired in the form of non-cash assets from a debtor for settlement of a debt or investment received by swapping the creditor's claim should be determined according to the book value of the debt, plus any corresponding tax payments.
企业接受的债务人以非现金资产抵偿债务方式取得的短期投资,或以应收债权换入的短期投资,按应收债权的账面价值加上应支付的相关税费,作为短期投资成本。
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The main points of view of this dissertation include:1、All kinds of economic behaviors of Chinese local government are its inevitable choice because of dual attributes resulted in the economic and political competitions.2、The total characteristics of the economic behaviors of Chinese local government are of game、un-normative、market and short-eyesight.3、The economic behaviors of Chinese local government in the vertical perspective can be depicted as economic competitions and political compliance.
在此基础上,提出了规范中国地方政府经济行为的对策建议。本文的主要观点包括:1、中国地方政府表现出的种种经济行为是处在经济和政治双重竞争环境中从而具有经济和政治双重属性的必然选择。2、中国地方政府经济行为的总体特征是博弈性、非规范性、市场性和短期性。3、纵向关系中的中国地方政府经济行为可以描述为经济抗衡与政治服从。
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Market respect: Middleman near future holds goods to wait for more go up, shipment is not much, the city after be opposite holds hopeful state of mind, the stock up before partial businessman section did not go out, section hind is purchased somewhat again, money is managed in the hand more, overall for, at present suitable anhydride market has certain supply of goods, but manufacturer and middleman cherish goods sell, market of predicting later period is small go tall to come after the psychological price of manufacturer and middleman, market supply of goods is met somewhat grow in quantity, short-term inside the space that arranges anhydride to still small go tall.
市场方面:中间商近期多持货待涨,出货不多,对后市持乐观心态,部分商家节前备货没出,节后又有所采购,手中持货较多,总体来说,目前偏苯三酸酐市场有一定货源,但厂家及中间商惜货出售,预计后期市场小幅走高至厂家和中间商的心理价位之后,市场货源会有所增多,短期内偏苯三酸酐仍有小幅走高的空间。
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Nurse 2.1 nurse commonly it is 10min of ~ of 5min of patient bubble foot with Wen Shui every night, use bibulous towel gentleness and wipe thoroughly, besmear equably with vegetable oil next at the patient double sufficient, massage gently absorb adequately what make, in order to achieve bit of skin softness, cleared scale, avoid weather-shack end. Clip fingernail shoulds not be too short, lest injure armour channel afterwards to send infection, do not stick adhesive plaster of cutaneous having damage, notice sufficient ministry heat preservation, footgear is appropriate, do not pass too small, excellent, close.
足背动脉搏动减弱7例,消失3例,缺血性溃疡4例,四周神经病变2例,表现为深浅感觉减退,经综合治疗20d~40d后治愈8例,好转4例。2护理2.1一般护理每晚用温水为患者泡脚5min~10min,用吸水毛巾轻柔而彻底擦干,然后用植物油均匀涂于患者双足,并轻轻按摩使之充分吸收,以达到皮肤柔软、清除鳞屑、防止干裂的目的。
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Of course, with short tools, there is no guarantee that you will not be wiped out, but at least there can be a tool to deal with.
当然,有了做空的工具,也不能保证你不会被消灭,但至少有工具可以应对。
- 推荐网络例句
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The split between the two groups can hardly be papered over.
这两个团体间的分歧难以掩饰。
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This approach not only encourages a greater number of responses, but minimizes the likelihood of stale groupthink.
这种做法不仅鼓励了更多的反应,而且减少跟风的可能性。
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The new PS20 solar power tower collected sunlight through mirrors known as "heliostats" to produce steam that is converted into electricity by a turbine in Sanlucar la Mayor, Spain, Wednesday.
聚光:照片上是建在西班牙桑路卡拉马尤城的一座新型PS20塔式太阳能电站。被称为&日光反射装置&的镜子将太阳光反射到主塔,然后用聚集的热量产生蒸汽进而通过涡轮机转化为电力