提高功率的

The invention relates to a processing method of preventing frostbite and restarting of hydrogen electric pile, whose characteristic lies in the treating processes includes: When the electric pile turns off, the unsaturated fuel gas or the nitrogen, through the circle boast to clean the dissociate water; drying the MEA film module to keep the water content below the stipulated temperature which does not ice up; then the recycle gas through a wet exchanger to dry and the dried gas is continue used in the dry pile step; when restarting the electric pile, the recycle gas must heats then through the pile to elevate the temperature, then heats the fuel gas and the oxidant of the gas source, through the weting of the wet exchanger enters to the calefactive pile, enhances the wet step of the film module in the pile, starts the power output of the pile.

本发明涉及一种氢电堆的防冻和重新启动时的处理方法，其特征在于处理过程包括：电堆停机时，将水蒸气不饱和的燃料气体或氮气，通过循环吹扫除去电堆的游离水；干燥其中的MEA膜组件，使膜组件含水量降低到规定低温下不结冰的程度；而后再令循环气体通过一个湿交换机将循环气体干燥，以及被干燥后的循环气体继续用来干燥电堆的步骤；在电堆重新启动时，须将循环气体加热后通过电堆，使电堆升温，然后再将气源的燃料气及氧化剂加热，通过湿交换机加湿后进入已升温的电堆，提高电堆中膜组件的湿度的步骤，开始电堆的功率输出。

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。

In the meanwhile, the TS characteristics of a scattering particle and their relationship are studied when it is passing through the scattering area, In addition to this, the distribution function of particles' shape is defenited in terms of math's method and a new method is putout of which the distribution of particles' shape is captured in according to the power spectrum and spectral distribution characterist of light scattering and finally, the utility of the perturbation ameliorating method and the effect of the particles' shape is modified, so far, the accuracy of measurement of the particles' size is improved effectively.

对此，本文在以Mie散射理论为原理，依据前向接收器接收的前向散射光信息以获取微粒大小信息的测量基础上，对微粒穿越光敏区时的时域与空域的特征以及相关性开展了研究，从数学上定义了微粒的形体分布函数，提出了一种依据光散射功率潜和频谱分布特征来获取微粒形体分布信息的方法，完善了微扰修正理论的应用性，有效地改善了形体的影响问题，从而可提高微粒粒度分布测量结果的准确性。

By means of the plating technology and the system designed and made ourselves, we call them as the direct-heat evaporating roll-pulled with vacuum piston and the helix evaporating of straight heat-wire with the negative thermal specific resistance , the align polishing ring films and the separating ones of pure gold have been plated directly at the inner wall of the capillary of Sealed-off CO〓 laser.

简便有效地使器件的输出功率、光束品质、稳定性和使用寿命都得以提高的作用效果；分析了放电驱动催化机理及催化效果与器件参数、工作状态及其中的等离子体过程的对应关系，建立了数学模型，编程数值计算了放电管内正柱区中等离子体参数分布及其与器件工作外参数的关系；利用我们设计开发的直热式真空活塞卷拖和负阻直热丝螺旋蒸镀工艺及制作的系统，在封离型CO〓激光器毛细管玻璃内壁上直接镀制出了单质金的镜面环膜和离散膜，经理论分析和实验检验，指出美国专利4756000号的环金方案将导致器件工作特性的改变和恶化，降低效率；肯定了正柱区边界部分场对建立良好的激光振荡的作用意义，明确提出了①作为高品质器件设计基础的弥散膜催化剂；②高斯管型弦驻波振动定型磨制、检测的新概念及相应的制备加工工艺；实际制出了管子，测定了其基本的工作特性和初期过程。

One transmission cell to another while maintaining the DVB-H service.· For a number of reception scenarios; indoor, outdoor, pedestrian and inside amoving vehicle, the transmission system shall offer sufficient flexibility and scalability to allow the reception of DVB-H services at various speeds, whilstoptimizing transmitter coverage.· As services are expected to be delivered in environments that suffer high levels of man-made noise, the transmission system shall offer the means to mitigate their effects on the performance of the receiving terminal.· As DVB-H aims to provide a generic way to serve handheld terminals in various part of the world, the transmission system shall offer the flexibility to be used in various transmission bands and channel bandwidths.

因此DVB-H采用分时方式的资料传送形式，把原本通道频宽是由其它节目共同分配享有的，现在只可以让某一个节目使用全部的频宽所以让节目传送的位元率提高了，相对的减少传送的时间，但跟DVB-T一样在单位时间内所传送的资料是一样多的，由於DVB-H采用分时多工的方式传送资料所以接收器只在该节目传送的时间内接收该笔资料，而其它时间则不接收然后在等一个单位时间内，该节目的资料再传送时在接收，如此开关开关达到收到整部节目的资料，并大量的减少持续接收节目所消耗的功率，接下来由於DVB-H采用4K正交分频多工编码的方式，虽然涵盖的范围没有DVB-T大但对高速移动的时候接收信号时的效果会比较好。

In 1992, a three phase double circuit line between Goudey and Oakdale station was reconstructed to six-phase line and was operated commercially by New York state electric and gas. It is a milestone from theoretical research to practical application in the development of six-phase transmission.With the decrease of cultivated land and the environmental problem in china, it is an important factor to improve power transmission density in the construction of electric network, and the predominance of six-phase transmission is obvious in this aspect.

六相输电是多相输电的一种，在国外六相输电技术作为提高输电线路功率传输密度，节约线路走廊空间的重要手段得到了充分的重视，对六相输电技术的研究也取得了很大的进展。1992年，美国纽约电力和天然气公司将Goudey到Oakdale之间的一条双回线路改造成了六相输电线，并且已经投入了商业运行，这标志着多相输电技术已经从理论研究向实际应用迈出了重要的一步。

The wetness measurement equipment is designed and manufactured. In this equipment, the wet steam sample is heated from wet steam state to superheated state, The wall temperature of both tubes becomes equal by regulating their heating power respectively. Therefore, no any of heat loss, including no thermal radiation heat loss, exists.

设计研制了一套具有实用价值的加热法湿度测量装置，实现了既对所抽取的流动湿蒸汽试样进行加热和通过调节加热段部分的内管与外管各自的加热功率使两者温度相等，消除了内管与外管之间的各种散热损失，尤其是避免了以往的加热法测量装置中无法避免的高温元件向外的热辐射损失，从而提高了湿度测量的精确度。

It was clear that the Cherenkov radiation is result of the coupling between the slow TM mode propagated along the waveguide and the negative-energy space-charge mode propagated along the beam, and the coupling strength is proportional to the beam density.

分析结果表明：切伦科夫辐射是由沿介质同轴波导传播的慢波与沿薄环形相对论电子注传播的负能空间电荷波耦合所致，且其耦合强度与电子注的密度成正比；输出频率和波增长率随着填充等离子体密度的增大而提高；保持一定的输出频率，增大电子注的束流可得到高的微波输出功率。

The split between the two groups can hardly be papered over.

这两个团体间的分歧难以掩饰。

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。