效率

To improve the bandwidth and power efficiency of conventional QPSK signal, the continuous phase QPSK is proposed.

针对导致传统QPSK信号带宽效率和功率效率低的相位跳变问题，提出了连续相位QPSK， CPQPSK调制。

The electronic heating evaporator in the high-side gravity recirculation system in ANSI/ASHRAE 64-2500 standard is replaced by a new type plate evaporator which is more effcient and energy-saving, because the cold water outlet from the evaporator that is used to heat the cryogen can be used once again to cool the air in the air inlet trunk; an air processing unit is designed in the lab design, so to imitate all kinds of weather in each season in every location of China at any time the test is being made; the data selection system can send all the data in the test to the computer at one time, and to reduce the cost of the test some data which is more stable are read manually through traditional meters if this can not sacrifice the precision of the test.

本文的设计中用效率更高的新型板式换热器代替了原ANSFASHRAE 64——2500标准中压缩驱动循环系统中的电加热蒸发器，加热冷剂后得到的低温淡水还可以用于冷却进气通道中的空气，不仅提高了效率，而且更加节能；实验室方案中增加了空气处理系统，可以实现随时对全国各地各季节的空气状态进行模拟，方便实验的进行；采用数据采集系统将数据整体采集到电脑中方便数据处理，而且对于变化频率不高相对较为稳定的数据采取传统仪表进行人工读数，在保证测试结果准确性的前提下降低了成本。

In DAS model,one important problem faced is how to improve the query efficiency in the encryption database,and cryptograph index technology is one of the methods to improve cryptograph query efficiency in database.

DAS模型下，如何提高密文数据库的查询效率是当前面临的一个主要问题，而密文索引技术是提高数据库中密文查询效率的手段之一。

Moreover, the pre-treatment and post-treatment processes for the steel sheet subject to continuous zinc plating were also discussed. Results showed that the alkaline zincate plating process had many advantages over conventional alkaline cyanide zinc plating process, including high current efficiency, good throwing power, and strung adhesion strength of the coating.

结果表明，该工艺电流效率高（锌离子含量16~24g/L时，电流效率可提高约20%，镀液均镀能力好（宽度为1m的镀锌薄板，中心点厚度与边缘厚度差不大于10%，镀层结合力优良（将试片180°任意弯曲，镀层无起皮、剥落现象；在烘箱中加热至180-200℃，保温60min，冷水中急剧冷却，镀层无突起、鼓泡、剥落现象），所镀得的镀锌薄钢板适合于钝化和彩涂等后处理。

The gasification efficiency increased and the molar fraction of H2 decreased with an increase in the reaction temperature. The decomposition of PVA was more complete at higher temperatures. At 24 MPa, 500℃ and 120 s, the TOC remove rate, the carbon gasification rate and the hydrogen gasification rate were up to 71.46%, 67.97% and 157.24% respectively. A change in the residence time had no significant effect on the molar fraction of gas production but an increase in the residence time could enhance the gasification efficiency of PVA. It was found that the intermediates were mainly alkane, cycloparaffin, aromatic hydrocarbons, and low-molecular weight acids. It was supposed that PVA was degraded into small molecules through breaking of C-C bonds. Parts of the molecules were converted into H2, CO, CH4 and CO2 while some was converted into aromatic hydrocarbons.

过程探索发现：反应温度的升高能提高PVA气化效率，但气体产物中H2的含量随反应温度的升高有所下降；随着反应温度的升高，PVA分解趋于彻底，在压力24MPa、温度500℃、停留时间120s的条件下，TOC去除率、有机碳气化率和氢气化率分别达到71.46%，67.97%和157.24%；停留时间的变化对气体产物含量没有明显的影响，但延长停留时间能提高PVA的气化效率；PVA气化反应中间产物主要为链状烷烃、环烷烃、芳香烃及小分子酸，根据中间产物出现的顺序推测PVA的降解为由C-C键断裂形成小分子物质，这些小分子物质一部分转化为H2，CO，CH4和CO2，一部分形成难降解的芳香族化合物。

This paper propose the analytical solve of effective factor of one-dimensional cylindroid catalyst, which takes an one-order inreversible reaction, by using special functions.

利用特殊函数求出了一维圆柱形催化剂在等温一级不可逆反应中的效率因子，并对其渐进方程和普遍化效率因子进行了讨论。

Indeed, any toxic asset purchase or guarantee programme must be an ineffective, inefficient and inequitable way to rescue inadequately capitalised financial institutions: ineffective, because the government must buy vast amounts of doubtful assets at excessive prices or provide over- generous guarantees, to render insolvent banks solvent; inefficient, because big capital injections or conversion of debt into equity are better ways to recapitalise banks; and inequitable, because big subsidies would go to failed institutions and private buyers of bad assets.

实际上，通过购买或担保问题资产来救助资金不足的金融机构，注定是一种不起作用、效率低下且不公平的手段：不起作用是由于政府必须以过高的价格购买大量可疑资产，或者提供过于慷慨的担保，才能使丧失偿付能力的银行重获偿付能力；效率低下是由于巨额注资或债转股才是对银行资本重组的更好方法；而不公平是由于巨额补贴将落入破产机构和不良资产的私人买家之手。

From the junction temperature-varied optical properties measurement, we find that the luminous efficiency will decay more quickly at low current operation. However, when the current density increases to the saturation capacity of the quantum well, the decay ratio will reach a constant.

在变温的光学特性量测上，由实验结果发现，发光效率在较低电流时会衰减的较快，然而在注入电流达到量子井的饱和量后，其发光效率随接面温度升高衰减的现象则会趋近於固定的比例。

This paper presented the research and exploration of mechanism and technics as well as the design of the magnetic circuit of this new compound machining, based on above, establishing the parameter model, meantime, analyzing influential effects on productivity of magnetic and EDM compound machining the holes through large numbers of experiments, including velcoity contrast experiments of pre-compound and after-compound machining with the change of current, velcoity contrast experiments of pre-compound and after-compound machining with the change of magnetic induction, velcoity contrast experiments of pre-compound and after-compound machining with the change of impulse width, experiments of the superficial roughness, experiments of the Electrode wastage, and intersectant experiments analysis as well as the change experiments of current waveforms. Through a number of experiments we analysed the influential effects of magnetic and EDM compound machining, compared the factors with EDM by oneself. A large of experiment records and deducibility have demonstrated that the productivity of magnetic and EDM compound machining is developed by 20%～400% than traditional EDM.

本论文对磁场电火花复合加工这种新的复合加工的机理、工艺和复合加工的磁路设计进行了研究和探索，在此基础上，建立了磁场电火花复合加工的参数模型，同时通过大量的随着电流变化磁场电火花复合前后加工速度对比实验、磁感应强度变化时的加工速度变化实验、随脉冲宽度变化的加工速度实验、表面粗糙度实验、电极损耗量实验、磁场电火花复合加工正交实验分析、电流波形变化等实验，实验分析了影响磁场电火花小孔加工效率的因素，并且跟单一的电火花加工中的影响因数进行了比较，大量的实验数据和理论推导证明磁场电火花复合加工比传统的单一电火花加工的效率提高了20％～400％左右。

The electrical propulsion system proposed in this article utilizes the advantages of PMSM such as small volume, light weight, small moment of inertia and high effectiveness of operation, high reliability, against the DC electric propulsion system"s defectiveness on structure and asynchronous electric propulsion system"s power defectiveness and inefficiency.

本文设计的PMSM电力推进系统利用了永磁同步电动机体积小、重量轻、转动惯量小、运行效率高、可靠性高等优点，弥补了直流电力推进系统在结构上的固有缺陷以及异步电力推进系统功率因素低和效率低的缺陷。

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。