可避免的

A modified backward Euler method is developed which enables to increase considerably the accuracy of jump voltage computation as a result of freeing its computing from the influence of the faint asymmetrical initial current in such an inductive circuit as converter and completely eliminate numerical oscillation in converter simulation as often seen in the case of implicit trapezoidal integration method.

本文提出一种变形的后退欧拉法，用该法对换流器这样的纯电感电路进行跃变电压计算，可完全避免初始电流中微弱的不平衡对跃变电压计算的影响，大大提高了跃变电压的计算精度，并彻底消除了隐式梯形积公法用于换流器仿真时所存在的非原型数值振荡。

On the same time, using GTM density control the construction quality reduce the phenomenon that the compactness is larger than 100%, and avoid pursuing the levelness with insufficient real compactness.

试验路的施工表明，用GTM方法推荐的级配的施工工艺与马歇尔设计方法推荐级配的沥青混凝土相同，只要碾压组合方式合理，均可得到要求的压实度和现场孔隙率，同时，用GTM密度控制施工质量减少了压实度超百的现象，从而避免了实际压实度不够情况下追求平整度的现象。

The algorithm can be served as the inverse operation of raster to 2DRE quadtree, but it is not direct inversion, instead, it takes other simpler measur i.e. intersection of 2DRE quadtree and code transforming method in Raster to Quadtree conversion, to make the algorithm more effective. It can also avoid possible trouble of memory overflow caused by the operation on bigger images in smaller memory.

这一算法可看作栅格—2DRE四叉树变换算法的逆变换，但不是它的"反演"，而是采用了较为简洁的求交集运算以及栅格—2DRE四叉树变换算法中的编码转换方法，使得这一算法的实现更加有效，且避免了在图像较大而内存较小的情况下可能发生的"溢出"等矛盾。

The analytical method is always used due to the large amount of the objects and not very high accuracy of forecasting. A method based on the position and velocity derived from the mean orbit elements directly is given, which is to avoid the problem of singularity in calculating the periodic terms of orbit elements variation, thus the process and software can be simplified.

在已有分析法得到t时刻平均根数的基础上给出一种轨道预报方法，由t时刻的平均根数给出该时刻卫星的位置和速度，在此基础上将地球非球形引力摄动的周期项直接用卫星直角坐标的位置和速度分量表示，这样可以避免在计算轨道根数变化的周期项时出现的奇点问题，从而对根数的选择无特殊要求，可适用于各种轨道，简化预报程序和相应的软件，提高预报效率。

The invention relates to a light pumping system for all-solid laser, particularly a light pumping system for disc type laser, comprising heat sink, laser crystal, optical fiber, plane reflector, a first concave reflector, a second concave reflector, and a third concave reflector, and adopting a structure that the plane reflector is between the optical fiber and the first concave reflector, to make the LD and laser cavity on the same side of the laser crystal, thus reducing the packaged size of the laser; the invention fixes the plane reflector on the heat sink to reduce the inclined incident angle of the pumped light beam, thus the pumped light can be fully absorbed, and the invention solves the problem of pumping efficiency and largely reduces the bulk of the laser, beneficial to the all curing of the product and ensuring the cooling requirement of the laser crystal.

本发明涉及全固体激光器的光泵浦系统，特别是一种盘式激光器的光泵浦系统。包括热沉1、激光晶体2、光纤3、平面反射镜4、第一凹面反射镜5、第二凹面反射镜6、第三凹面反射镜7，本发明采用平面反射镜位于光纤与第一凹面反射镜之间的结构，使LD和激光腔位于本发明激光晶体的同一侧，从而减小了激光器的封装尺寸；本发明将平面反射镜固定在热沉上，使泵浦光束斜入射角减小，泵浦光则能充分吸收，为此，本发明解决背景技术采用第一凹面反射镜使泵浦光束斜入射角过大引起的像散，泵浦光斑变形引起泵浦效率降低问题，使得本发明可选用大面积半导体制冷器，避免使用水冷，则激光器的体积大大减少，有利于产品的全固化，保证了激光晶体的散热要求。

The research and development of visualization system of electromagnetic environment monitor is very necessary, and it is very important significance. It can assure the quality of communication for avoiding the interface of electromagnetic signal, live up to reasonable layout and distribution for the construct of mobile communication station and radio monitor station, reduce the endangerment electromagnetic radicalization for surrounding environment and body of people.

为了避免电磁信号之间的相互干扰，保证通信的质量；为了对移动通信基站或无线电监测站的建设，做到合理的规划和布局；为了减少电磁辐射对周围环境和人体的危害，研究并开发电磁环境监测可视化系统就显得很有必要，具有十分重要的意义。

The results show that not only the porosity does greatly affect the windbreak, but also the tree distance does. The distance is not beyond 1.3 to avoid air leak. The tree belt with porosity 31% has bigger windbreak range and better characteristics for abating wind erosion. The tight nubby tree belt is advised to restrain the particles adhering on the leaves refloating for large velocity deficit in trees.

结果表明：不仅林冠疏透度对防护林带的遮蔽防风有明显影响，而且树木间的株距对林带整体的遮蔽效果也有比较显著的影响，为避免穿流风对遮蔽效应的影响，林带宽距比不宜超过1.3；疏透度为31%的网状林带的有效防护范围大，防风效果好而且水土保持性强；紧密型块状林带，林后速度衰减幅度大，可抑制附着在叶片上粉尘的再次扬尘。

Adjusting insertion depth of the tuning screw pin at any moment can reach tuning effect to make waveguide device match to load of resonant cavity well in order to adapt to everchanging equivalent load of resonant cavity in course of working so as to realize real time control of energy coupling. The invention helps to increase working accuracy and efficiency of PCVD technique, and prevent damage on system device from microwave so as to raise useful service life of system. Features are: simple structure, stable performance, convenient for fabrication.

本发明通过在谐振腔设置调谐销钉，可随时调节销钉的插入深度来达到调谐的效果，能使波导装置很好地与谐振腔负载匹配，以适应加工过程中谐振腔等效负载的不断变化，实现能量耦合的实时控制；同时有助于提高PCVD工艺的加工精度和效率，避免微波对系统器件的损坏，提高等离子体谐振腔微波系统的有效使用寿命；本发明还具有结构简单，性能稳定，便于加工和制作的特点。

These antennas can cover GSM900/DCS/PCS/UMTS operation. In the chapter 2, the antenna is designed based on the concept of monopole antenna. Furthermore, the antenna structure have two radiant paths and coupled each other at tail end to do impedance matching. In addition, to raise distance between radiation plane and ground will avoid capacitative effect effectually. In the chapter 3, the antenna is designed based on the concept of planar inverted-F antenna. Furthermore, that the antenna structure have two radiant paths and coupled each other at tail end to do impedance matching is similar to chapter 2. But there is a difference in them. We can choose the short position to change input impedance at this structure. In the chapter 4, the antenna is designed based on the concept of planar inverted-F antenna which takes coupled-fed. It will produce the first mode and high-order mode near the frequency, 900MHz. The feature of this type is to reduce the volume effectually. This antenna can not only cover GSM900/DCS/PCS/UMTS operation but maintain good radiation efficiency. Finally, we will compare three antennas, and develop procedure with industrial view, and propose the prospect of the GSM/GPRS antenna in PND, as a conclusion.

在第二章中，我们使用单极天线设计概念，使用双路径架构并於末端耦合来对天线阻抗做匹配，产生涵盖GSM900/DCS/PCS/UMTS四频操作频带，并提高与接地面的辐射高度，以避免电容效应，使天线具有良好的辐射特性；在第三章中，使用倒F形天线设计概念，使用双路径架构於末端耦合，并於辐射臂上采取适当接地点电感效应作输入阻抗匹配，达成涵盖GSM900/DCS/PCS/UMTS系统的四个操作频带；在第四章中，采用倒F形架构并使用耦合馈入方式，使得长辐射金属臂在低频900 MHz附近产生共振，产生低频基频模态及高阶模态，以达成宽频及频宽涵盖GSM900/DCS/PCS/UMTS频带操作，并有效缩减使用体积；最后，分别比较此三种架构的优缺点，再加以业界角度来思考，研发产品天线的流程及思考方向，以及天线应用於可携式导航装置中未来的展望作为本论文的总结。

A natural anxiety to escape the awful consequences of determining a particular act to be mortally sinful, and a desire, equally intelligible, to assist the Roman Catholic Church in its conflict with Protestantism by disburthening it of an inconvenient theory, were the motives which impelled the authors of the Casuistical philosophy to the invention of an elaborate system of criteria, intended to remove immoral actions, in as many cases as possible, out of the category of mortal offences, and to stamp them as venial sins.

迫使诡辩哲学的著者发明一套精密的规范体系，以便在尽量把不道德行为从不可赦犯罪的范畴中移出来，并把它们定为可赦之罪，其动机之一是出于一种自然的渴望，想要避免把一种特定行为定为不可赦罪的可怕后果，另一种动机是出于一种同样地可以体会的愿望，就是为天主教会解除一种不便的理论，来帮助罗马天主教会在和基督新教进行的冲突中取得胜利。

For a big chunk of credit-card losses; the number of filings (and thus charge-off rates) would be rising again, whether

年美国个人破产法的一个改动使得破产登记急速下降，而后引起了信用卡大规模的亏损。

Eph. 4:23 And that you be renewed in the spirit of your mind

弗四23 而在你们心思的灵里得以更新