| 1. | Ac loss characteristics of a 45kva single - phase hts transformer
单相高温超导变压器交流损耗特性研究 |
| 2. | Test methods for ac loss characteristics and permittivity dielectric constant of solid electrical insulating materials
实心电绝缘材料的交流损耗特性和电容率 |
| 3. | The power dissipation of 4h - sic mps was calculated . the influences of temperature on sic mobility , ionization rate and intrinsic carriers density were taken into account
建立了4h - sicmps的功率损耗的解析模型并对其功率损耗特性进行了计算。 |
| 4. | The working mechanics , optimum design and power dissipation was studied in this thesis . the transport characteristics of 4h - sic mps was simulated . the working mechanics of 4h - sic mps was two - dimensional analyzed
本文对4h - sicmps的工作机理进行了模拟分析，优化设计了器件结构，并对其功率损耗特性进行了研究。 |
| 5. | The ctc series chip capacitor has much lower esr and esl than most leaded type capacitor and lts lower dissipation factor leads to lower power is wasted than aluminum electrolytic and tantalum capacitors
Ctc系列电介质材料有： npo ， x7r ， y5v ， z5u ctc系列与大多数引线电容相比有更低的esr和esl ，低损耗特性使它比铝电解电容和钽电容更省电。 |
| 6. | In the paper , transmission loss , polarizing and nonlinear characters ( chiefly about srs spectrum ) in highly single mode silicon elliptical optical fiber and circular optical fiber are experimentally and theoretically researched
本文对石英系单模椭芯和圆芯光纤的传输损耗特性、偏光特性、非线性特性(主要是srs谱)进行了系统的实验研究和理论分析，给出了实验装置和测试原理。 |
| 7. | The loss of coplanar wave - guides ( cpws ) on ps / ops layers with thickness about 10 , and 70um respectively on low - resisitivity ( o . olflcm ) si has been studied , which are expected to increase the substrate resistivity and then to reduce its effective dielectric loss under the microwave operation
01只cn : ) _ l生长的多孔硅/氧化多孔硅厚膜为衬底制备的共平面波导( cpw )的微波插入损耗特性，其介质膜的厚度分别是10脚和70脚。 |
| 8. | In order to utilize the frquency resource adequately and increase the capacity of mobile communication system , the wireless electric wave propagation of existing mobile system always adopts the microcell structure . forecasting the path loss characteristic of electric wave accurately can provide the necessary condition for the layout and design of wireless network , at the same time it is a precondition for the research on the microcell mobile system . the methods of forecasting of wireless electric wave propagation can divide into two parts : one is pluse and respond , that is establish the empirical model based on experimental and statistical data ; the other is ray tracing method , that is establish the deterministic model based on theoretical analyse . the paper discuss the characteristic of wireless signal electric wave transmition in symmetrical atmosphere of earth , and introduce the common path loss transmition model in land mobile communication system , also point out the localization of these models based on experiential methods
而精确预测无线电波传播路径损耗特性，则为合理的微蜂窝无线网络规划、设计提供了必要条件，同时也是研究微蜂窝移动通信系统性能的前提。无线电波传播预测的方法分为两类：一是用冲激响应法，即根据实验、统计所得数据建立经验性传播预测模型；另一种是用射线跟踪方法，即依据理论分析来建立确定性的传播预测模型。本文首先讨论了在地球表面均匀大气中的无线电波传播的基本特性，介绍了陆地移动通信系统中常用的几种电波传播路径损耗经验性预测模型，并指出了这些经验性传播模型对于微蜂窝小区无线电波传播特性研究的局限性。 |
| 9. | Because the cross - section of the oversized rib waveguide we fabricated by wet - etching was trapeziform , we analyzed the transmission of oversized rib waveguide by combining effective refractive - index method . the influence of some factors on the optical transmission loss , such as material structure , the height of rib waveguide , and the thickness and refractive index of waveguide layer and up - layer of polymer material , was analyzed
因为湿法腐蚀工艺制作的反脊波导横截面是梯形状的，因此论文中采用了一种简单有效的方法，即有效折射率法，对梯形反脊波导的光传输损耗特性进行了分析，同时考虑金属电极产生热场对脊波导传播特性的影响。 |
| 10. | The paper is mainly focused on two fields . one is the formation of any thick porous silicon ( ps ) layers , which is content with 1c process . the other is the low - loss performance of passive elements fabricated on ps / oxidized porous silicon ( ops ) inter - layers under microwave operation
本论文主要的研究内容分为两个方面：其一是厚度可控的与ic工艺兼容的多孔硅膜的形成技术研究；其二是研究在多孔硅氧化多孔硅介质膜上制备无源器件的微波低损耗特性之可行性。 |
