使稳定

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。

It was shown that the SNR of the RADS could be improved by using a microwave cavity with proper microwave field mode and high microwave filling factor, a rubidium spectrum lamp with high spectrum purity and a separated isotope filtering scheme in the physics package design. The performance of the rubidium atomic frequency standard could be improved by taking all these factors into consideration.

本文分析了微波腔的结构、铷光谱灯的光谱纯度和同位素滤光方案对信噪比的影响，指出采用模式优越、微波填充因子大的微波腔，光谱纯度高的铷光谱灯，用分离滤光方法进行同位素滤光，可以提高铷原子鉴频信号的信噪比，从而使铷频标的稳定度指标得到进一步改善。

Generally, unsaturated alkyl chains favour stability at high solids. Soft tallow amidazoline quats and soft tallaw amidoamine quats are potential candidates for formulation up to 24% actives.

大体上讲，饱和的烃基链十分稳定。soft tallow amidazoline quats和soft tallaw amidoamine quats是可能的备选成分，可使活性达到24％。

The binding of different halide anions to four strapped calix[4]pyrroles was studied by means of molecular mechanics and molecular dynamics simulations methods. The results indicate that the anion binding ability of calix[4]pyrrole-type systems could be effectively tuned by modifying the length and nature of the bridging straps. In this process, it was the most stable conformation upon anion binding due to the formation of four NH\|halide hydrogen bond, simultaneity, the difference of cavity by modifying straps adapted themselves to different halide anion.

模拟结果表明，加入带状修饰链和调节链长可以增强对某种特殊卤素阴离子的识别，在这个过程中，卤素阴离子与杯[4]吡咯NH上的氢形成的多氢键使主体分子与阴离子形成稳定复合物，同时带状修饰链通过改变杯吡咯空腔大小影响主体分子与卤素阴离子的氢键相互作用，从而调节了对不同阴离子的识别能力。

Screws and plates in the pedicles of atlas and axis can make the atlantoaxial joint stable in three - dimension immediately.

结论采用寰枢椎椎弓根钉板固定可以使寰枢椎即刻得到坚强的三维稳定，是一种值得推广应用的手术方法。

In order to improve the precision of clock of time server, it is necessary to create a new system calls to adjust clock time in operation system. Because the traditional system calls will cause the instability of clock output, and increase the complexity.

为了使时钟服务器的时钟精度达到更高的精度，用传统的系统调用宋完成计算机时钟的调整和偏移会造成时钟精度的不稳定，并且增加了复杂性，因此需要在操作系统内核创造新的系统调用来完成时钟调整。

The dose of rHuEPO began to decrease in A group after eighth week, which had distinctive difference with that of B group (P.05). In A group , the dose of rHuEPO was just two thirds of that in B group during the sustain period.6. The kidney function of two group patiences was stable or improved during the treatment period ,which of A group was improved distinctly after treatment.

两组药物都能使患者肾功能好转或稳定，A组治疗后与用药前比较有非常显著性差异(P.01)，B组治疗后较治疗前有改善但无统计学意义；治疗结束后两组间比较有显著性差异(P 。05)，A组优于B组。

An experimental system of pressure regulator characteristic is introduced.

减压器是利用节流原理工作的部件，其作用是使进口的高压气体的压力降至规定的值，并稳定在一定的压力范围内。

Cherry Group has internationally advanced modern equipmint, such as combiners, automatic cone winders, sizing machine introduced from Germany, warping machine introduced from Switzerland, Toyota air-jet looms introduced from Japan and air compressor introduced from the U.S.A forming production lines of pure cotton and truetan, with an annual pure cotton and trueran production of 8000 tons. cotton cloth of 40 million metres and knitwear clothes of 1 million pieces, sold to more than 10 countries and areas, annual export hand over value reaching over 80 million yuan.Cherry Group strictly abides by ISO-9000 standards in production, establishing quality guarantee system from import of raw materials to export of products, adopting the internationally advanced uster yarn tester, strengthing product quality monitor and control and ensuring the stability of products quality.

集团公司具有世界先进水平的现代化设备，先后引进了德国清钢联合机、自动络筒机、祖克浆纱机、泽尔浆纱机、瑞士贝宁格整经机、日本丰田喷气织机、美国英格索兰空气压缩机等国家的现代化设备，使企业技术装备达到了 90 年代国际先进水平，企业严格按照 ISO－ 9000 国际系列标准组织生产建立了从原料到产品出厂的质量保证体系，采用了国际上先进的乌斯特测试仪，加强产品质量的跟踪监测和控制，保证了产品质量的稳定，年产各种规格的普梳、精梳、纯棉、化纤和各类混纺纱 8000 多吨，各类坯布、装饰布、防羽绒提花、服装面料 4000 万米，针织面料 100 万件，浆料 2000 吨，各种产品在市场上享有良好的信誉。

So we are able to compensate to this fine tuning of what we eat and what energy we expect or maybe not on a daily basis but certainly in a weekly or monthly basis, most of us are reasonably have weight stable without putting on ten stone every decade.

所以说我们的身体可以适当调节摄入的食物与我们所期望的能量，使两者达到均衡，也许不是以每天为计量单位，而是以每月或每年为计量单位，正因为如此我们大多数人都能保持体重的相对稳定，不会出现每十年体重就增加10石的情况。

However, as the name（read－only memory）implies, CD disks cannot be written onorchanged in any way.

然而，正如其名字所指出的那样，CD盘不能写，也不能用任何方式改变其内容。

Galvanizes steel pallet is mainly export which suits standard packing of European Union, the North America. galvanizes steel pallet is suitable to heavy rack. Pallet surface can design plate type, corrugated and the gap form, satisfies the different requirements.

镀锌钢托盘多用于出口，替代木托盘，免薰蒸，符合欧盟、北美各国对出口货物包装材料的法令要求；喷涂钢托盘适用于重载上货架之用，托盘表面根据需要制作成平板状、波纹状及间隔形式，满足不同的使用要求。