损耗

Reflective properties of HIS loading resistance and finite conductivity patch were analyzed by HFSS electromagnetic simulation software,and the absorbing effects of square patch HIS and dentiform patch HIS with loss were compared.

研究了带有损耗的高阻表面，使用HFSS电磁仿真软件仿真分析了电阻加载和有限电导率贴片高阻表面的反射特性，并对带有损耗的普通方形贴片与齿化贴片高阻抗表面的吸波效果进行了对比。

And mirror glassless grain-oriented silicon steel with ultra-low iron loss has found its attractive applications in manufacture of ultra-low loss and low noise transformers.

无底层取向硅钢具有良好的磁性能和加工性能，已在大型旋转电机领域获得应用；具有超低铁芯损耗的镜面无底层取向硅钢，如在张力涂层技术与工艺方面获得突破，在超低损耗和低噪音变压器等领域具有广阔的应用前景。

D eddy current model for litz copper foils is built to analyze AC winding losses.

通过建立一维涡流模型，对新型双绞铜箔进行交流损耗分析，分析结果表明铜箔绞绕方案能有效减小线圈损耗。

The characteristics of this copolyimide in chemistry and photics were determined.High quality copolyimide film could be obtained by casting the copolyimide solution on glass plate.Then the copolyimide was made into waveguide by using advanced processing techniques.Test results at optical co...

共聚物材料在溶液状态下用旋涂法获得了较高质量的共聚物薄膜，并在此基础上采用先进的光波导工艺技术将该材料制备成条波导，测试结果表明该波导在光通信波段1550nm处的平均传输损耗小于0.66dB/cm，局部损耗在0.2dB/cm，进一步改进后有望获得性能优异的光电子器件。

In this paper, arrangement scheme of a novel multi-star phase shifted pole changing coil was given and the methods to determine coil split ratio were analyzed. According to electromagnetic theory, 2D electromagnetic mathematical model in which stator windings were spitted coil was developed, and magnetic field distribution of the novel motor at starting was solved by finite element method, starting performance of motor was calculated. Based on energy method, rotor slot leakage reactance under different poles and different loads were calculated, and the variation of rotor slot leakage reactance with loads was gotten. Based on time-step finite element method, distribution of branch current in stator windings and operating performance were calculated and analyzed when branch was unbalance, the method to calculate circulating loss in stator windings of novel multi-star phase shifted pole changing motor was given, and the effects of the loads variation and degree of unequilibrium on circulating loss in stator windings were calculated and analyzed.

论文系统的给出了采用分裂线圈法新型多星形移相变极绕组的排列方案，进一步分析线圈分裂比的确定方法；根据电磁场理论，建立了定子为分裂线圈绕组的电机二维电磁场数学模型，并采用场路耦合法求解了新型多星形移相变极电机起动时的磁场分布，计算了电机起动性能和基于能量法计算了不同极数下起动时转子槽漏抗和不同负载时转子槽漏抗，得出转子槽漏抗随负载变化的规律；采用时步有限元法计算分析了定子绕组支路不平衡时支路电流的分布情况及运行性能，给出了新型多星形移相变极电机定子绕组环流损耗的计算方法，分析比较了负载的变化和支路不平衡度大小对定子绕组环流损耗的影响。

I.! y P,{7 v: R; O0 D INTRODUCTIONIn most of the previous studies like [1-3], the effect of SRS in DWDM fiber opticsystems has been treated under various assumptions like undepleted pump approximation, wavelength independent fiber loss coefficient, triangular approximation of Raman gainprofile, negligible loss of energy whenever a short wavelength photon is transformed into a long wavelength photon (i.e., l i / l k ~ 1), equal power loading in all the wavelength channels and equal channel spacing.

P _ W/ I 在以往的绝大多数研究中，如[1-3]，人们都认为， SRS 在 DWDM 光纤系统中的影响是在诸多假设，如未衰减泵近似值，波长依赖光纤损耗系数，喇曼增益表的三角近似值，当短波光子被转变为长波光子时(i.e。， l i / l k ~ 1可忽略不计的能量损耗，各波长通道均等的动力负载以及均等的信道的频率间隔。

Based on the developed iron loss of surface-mounted permanent magnet machine of Slemon and Xian Liu, the expressions of the peak and the time rate change of flux density in the teeth and the yoke are derived, considering the beveling edges of the PM. According to the basic concept of the eddy current loss, the analytic calculations of the average eddy current loss density in the teeth and the yoke are presented respectively. Hence, a calculation method for the iron losses of PM with beveling edges is presented.

在Slemon和Xian Liu表面置磁型永磁电机改进铁耗算法的基础上，分别推导了考虑磁体边缘斜角时定子齿与轭的磁通密度的幅值及其时间变化率的表达式，结合涡流损耗的基本概念，分别提出了永磁电机定子齿与轭的平均涡流损耗密度的解析计算方法，由此建立了永磁电机铁耗的解析模型。

The theoretical analysis indicated because in the optical fiber core base mold and disseminates in the envelope as well as in the spreading level Whisperin between the g2gallery pattern coupling, caused the curving loss vibration, this article the curving loss has carried on the simulation analysis to the single model optical fiber in along with the bevelling radius change.

理论分析表明由于光纤纤芯中的基模和在包层以及涂覆层中传播的Whisperin g2gallery 模式之间的耦合，引起了弯曲损耗的振荡，本文对单模光纤中弯曲损耗随弯曲半径的变化进行了仿真分析。

The S11-M series three-phase oil immersed distribution transformer belongs to state high-tech new product,it is developed based on new type S9 series product's mechanism design,the design idea is mainly aimed at heightening product's reliability and performance,design reportedly adjusts some coefficient of losses and mechanism according to new S9 product,so as to have loss deigns up to measured value;meanwhile,the optimizing design properly,fix ratio of cooper to iron,in order to decrease material cost and have structure more proper.

S11-M型系列三相油浸配电变压器是国家科技新产品，在新型S9系列产品结构设计的基础上进行开发的。设计的主导思想是满足产品的可靠性，提高产品的性能，设计中根据新S9产品的实际情况，重新调整了一些损耗系数及结构，使损耗设计值更符合实侧值；同时进行了优化设计，合理确定铜铁比例，使材料成本最低，结构也更合理。

The permittivities of N, N-dimethylformamide, water (H2O), and DMF-H2O mixture solution were measured by a resonant cavity perturbation method at 2.45 GHz and 288, 298, and 313 K. The measured results showed a specific phenomenon wherein the imaginary part of the solution's permittivity was larger than that of each of the components.

在288、298和313K三个温度和2.45GHz频率下利用微扰谐振腔法测量N，N-二甲基甲酰胺、水(H2O)及其混合溶液的等效介电常数过程中，发现了混合溶液介电损耗虚部大于其中任一组分的介电损耗虚部的特异现象。

This one mode pays close attention to network credence foundation of the businessman very much.

这一模式非常关注商人的网络信用基础。

Cell morphology of bacterial ghost of Pasteurella multocida was observed by scanning electron microscopy and inactivation ratio was estimated by CFU analysi.

扫描电镜观察多杀性巴氏杆菌细菌幽灵和菌落形成单位评价遗传灭活率。