线路的

The reflection and refraction of traveling wave are quite complicated at the sheath-crossing point of high voltage power cable, due to its remarkably noncontinuous surge impedance.

高压电缆的金属护套交叉互联导致行波在多个波阻抗不连续点产生了复杂的折反射行为，这对高压电缆线路的行波故障测距产生很大的影响。

The analysis of dynamic response of the modulation and the demodulation circuit s and the auxiliary car- rier wave amplifier have been considered more in details.

所用方法是差分方程求解法，因为用差分方程来描述具有机械振子的调制解调线路的固有工作过程，要比用相同的初始条件的微分方程来描述更为准确。

Three typical cross section of subgrade has been chosen to test, one of which is near the rail gap. The dynamic characteristic test of subgrade bed including part of subballast and the long-pe

根据各断面在列车荷载作用下的动应力、动变形、振动速度、加速度和累积沉降等实测数据，分析了各影响因素对基床动力特性的影响和不同加固方案及轨缝附近线路的长期沉降变化规律，有以下基本结论：(1)砂土夯实桩与土工格室加固措施能提高基床的承载力，改善基床

Compared the accuracy of the digital tera in models enlarged form the air photographs kept in stock, pointed out the reliability and frugality of the computerizing optimum choosing route in surveying and designing the expressway, and proved the f

文摘：比较了利用现成航摄像片以小放大数字化成图的精度，并指出了其在高速公路勘测设计中计算机优化选线的可靠性及经济性；同时也论证了两步选择最优化线路的可行性及其对高速公路建设投资的影响和决策。

There are TAIHONG 2LPSE0503MW-250 single unadhesive ED flexible copper coated lamination and Nippon Steel CIPW-25080 single ED FCCL.Regards to photoresists, Dupont FX915 dry film would be the best choice for the production of COF FPC after the comparison in photosensitive property, resolution, adhesiveness and operating procedure between the different resist thicknesses of Dupont FX900 series.

光致抗蚀剂方面：通过对比杜邦FX900系列两种不同抗蚀层厚度干膜(FX930与FX915)的感光性能、分辨率、附着力、操作工艺等，确定出杜邦FX915(抗蚀层厚度15μm)为更适用于COF挠性印制板制作的干膜；并对干膜的曝光参数进行了优化，最佳曝光级数5级(相对于21级曝光尺)，曝光能量片式150mJ/cm~2、卷式110mJ/cm~2，使其更加适合于精细线路的制作。

THE USE of conventional, unsymmetrical amplifier circuits in biomedical engineering is very limited, because of their inadequacy in suppressing power-line interference.

常规的不对称放大器电路在生物医学工程中的使用是有限的，因为它们在抑制电力线路的干扰上存在不足之处。

In the standardized and feminized social figure of an air hostess, the lines of class and gender fall neatly within one anther e.g.

在标准的和有女性风度社会的图的空中小姐，线路的班级和性别落下整洁地不越出1个花药(例如Skegges，2004 )。

Consequently research on directional element applicable for EHV transmission lines has become a urgent task for current relay protection field.

因此，研究适用于高压输电线路的灵敏性更好、速度更快、可靠性更高的方向元件成为当前继电保护领域十分紧迫的任务，具有特别重要的意义。

Electric potential waveshapes of tower body and crossarms were presented by EMTP, also voltage waveshape between upper or lower crossarms and any given phase conductors.

分析结果表明，在高杆塔情况下，降低冲击接地电阻对耐雷性能的改善效果不大；在中横担外侧加设辐合地线和上横担中部增设避雷线以及适当调整导线与上下横担之间空气间隙的距离可有效的改善输电线路的耐雷性能；在条件允许的情况下，建议降低杆塔高度。

The paper describes in detail the four factors resulting in the corrosion of buried steel pipeline,that is environment,corrosion control effectiveness,material of pipe steel,and stress of pipeline,presents a total statistics on petroleum asphalt,coal-tar enemal,extruded polyethylene coating,PE tape,FBE,and multiple coating system and the individual percentage of theirs per years during 1990-1995,and points out that the selection of all kinds of coatings,being different behaviors,should be defermined according to the geological conditions and corrosive environments along pipeline route.

阐述了埋地钢质管道发生腐蚀的四个影响因素，即环境、腐蚀防护效果、钢管材质和制造工艺以及应力水平，统计了1990-1995年石油沥青、煤焦油瓷漆、挤塑聚乙烯、PE胶带、FBE、复合覆盖层的涂敷量，指出防腐覆盖层各有优缺点，应根据管道线路的地质条件、腐蚀环境等而定，目前应建立防腐层的综合评价方法以解决防腐覆盖层的设计问题，同时还应对钢管表面处理、现场补口加以重视，在采用高强薄壁钢材时应考虑壁厚要求。

According to the clear water experiment, aeration performance of the new equipment is good with high total oxygen transfer coefficient and oxygen utilization ratio.

曝气设备的动力效率在叶轮转速为120rpm～150rpm时取得最大值，此时氧利用率和充氧能力也具有较高值。

The environmental stability of that world - including its crushing pressures and icy darkness - means that some of its most famous inhabitants have survived for eons as evolutionary throwbacks, their bodies undergoing little change.

稳定的海底环境─包括能把人压扁的压力和冰冷的黑暗─意谓海底某些最知名的栖居生物已以演化返祖的样态活了万世，形体几无变化。