变负荷

The principle of the novel single-phase hybrid active power filter is described in detail. Based on the above analysis, Kalman filtering approach for estimation of harmonics is presented to improve the speed and precision of harmonic detection, and it also can avoid the influence made by voltage distortion on harmonic detection. A new current control strategy based on energy balance is presented to regulate the active part absorbing or releasing active power and control the inverter to produce current opposite to the harmonic current reflowing in injection branch, the above method combined with harmonic current tracking control that keeps the stabilization of dc-side voltage and improve the reliability of the system.

并详细分析了系统的滤波原理，提出了基于卡尔曼增益自调整的改进型动态谐波含量估计方法，能够快速准确的跟踪检测电网谐波电流，并且克服了电力机车等冲击性负荷引起的电网电压畸变对谐波检测精度的影响；提出了基于逆变器两侧能量平衡的电流控制方法使有源部分吸收或释放一定有功或无功功率及产生与注入支路回灌谐波电流相反的抑制电流，然后联合电网谐波电流跟踪控制以获得系统参考信号，保证了直流侧电压的稳定，提高了装置可靠性，增强了系统滤波性能。

Metals and alloys in the plastic working process, the flow stress determined the deformation of the size of equipment needed to load and the size of the required energy consumption.

因此在金属和合金的塑性加工过程中，流变应力的大小决定了变形设备所需负荷及所需消耗能量的大小。

According to the learning of the Power l Supplying Projet, the primary design is about the 10kv switch-substation, according to the load and demand of the supply electric system of factory, the design of the gather reduction voltage substation and distribution system, and the checking of the main electric apparatus, the protection and adjusting and the lightning protection of the main voltage changer and line.

开闭所继电保护设计*。本文通过对供电工程的学习，主要是针对10kV 开闭所进行初步设计。根据所提供的负荷及对供配电系统的要求，对主要设备进行选型校验，对主变压器、线路进行保护整定计算，对主、变线路进行防雷保护等。

As an example, the method was used to determine the boundary condition during transient calculation for a power station equipped with two Francis turbines and a surge tank.

将求得的结果用于我国某电站机组甩负荷过渡过程的计算，得出了变童随时问的变化规律，计算结果与实际情况相符合。

To study the performance of screw compressor, the key component in heat pump chiller, a mathematic model for simulating the behavior of the compressor's working process is presented in this paper, based on the thermodynamics of mass-variable system and the p-V indicator diagrams acquired by experiment.

为此，本文在实测压缩机在经济器补气工况、部分负荷工况、不同冷却方式等工况下p-V指示图的基础上，并基于变质量系统热力学原理，建立了螺杆制冷压缩机工作过程热力学数学模型，考虑了喷油、泄漏、热交换及补气等因素对工作过程的影响。

4The factors that influenced the caregivers of the Down syndrome students were "care-giver's need for society support" and "care-giver's living quality". These two factors can explain 24.1% of the total variance. Furthermore, the caregiver's living quality was the strongest predicting factor.

四、在学唐氏症患者家庭照顾者照顾负荷之有效预测因子为「照顾者社会支持的需要程度」及「照顾者生活品质」二个变项，共可解释24.1%的总变异量，而照顾者生活品质为最强的预测因子。

Based on theory of keeping load distribution, fast monitor AGC including model and arithmetic in detail was put forward.

基于保持负荷分配比例不变的思想，提出了快速监控AGC方法，并给出了具体的计算模型和计算方法。

With the rapid increase of portion of large capacity arc furnace load in power system, voltage flicker has become a serious problem.

随着电力系统中大容量冲击负荷的不断增加，配电网中的电压闪变也越发严重，因此需要对其进行检测和分析，为进一步的治理奠定基础。

I will endeavour to find you some assistance.

我尽力帮你找人帮忙。

At first I only know bruck is the idol of American younglings, afterwards I returned back to Taiwan ,even in Beijing last year ,I saw her poster everywhere, I was so surprised at her charm.

起初我只晓得布鲁克雷德丝是美国少男少女崇拜的偶像，后来回台湾，甚至去年在北京，居然也四处看见她的海报，才惊讶她的魅力之大。