可要求的

The results show that the optimum mole percent of Al3+ to Yb3+ is 9—11 for high concentration of ytterbium-doped silica-based fiber at which low concentration quenching probability, high absorption coefficient and proper numerical aperture can be obtained.

揭示出在高掺Yb3+的石英基光纤中，共掺Al3+的摩尔浓度为Yb3+摩尔浓度的9—11倍时既可以减小Yb3+的浓度猝灭概率，又可以获得高吸收系数，同时还可更好地满足数值孔径的要求的结论。

The foundation of this system provides a good reference to promote the standardization and intelligence of the overhaul and maintenance of vacuum switches. This paper develops a special HF pulse power supply for internal pressure estimation, which achieves the output of HF-HV sinusoidal pulse wave whose frequency and amplitude can be modified respectively, and meets the design requirements according to the results of Simulink simulation and practical experiments. With the help of AT89S52, this paper designs an I~2C serial bus based signal detection system for peak value signal acquisition of HF pulse currents, which communicates with the upper computer by asynchronous serial communication for uploading the data. In the upper computer, a human computer interface is developed by Matlab software, whose functions are to do some computation and graphic display, such as calibrating the relation curve of vacuum degree and peak value of HF pulse currents, vacuum degree computation, and vacuum lifetime evaluation analysis basing on grey forecasting model as well as making relative suggestions.

本文研制了用于真空度检测的高频脉冲电源，通过Simulink仿真和试验检验其满足设计要求，实现了电压幅值和频率独立可调的正弦波高频高压脉冲输出；利用以AT89S52为核心基于I~2C串行总线的信号检测系统实现高频脉冲电流峰值信号的采集，通过异步串行通信实现单片机与计算机之间的数据通信，将检测数据传至上位机；在上位机利用Matlab开发人机交互界面，实现相关数据处理和图形显示，包括真空度——高频脉冲电流峰值关系曲线标定、真空度数值计算、基于灰色预测模型的真空寿命评估分析和提出相应决策建议。

The application of PLC design for cutting the cold-roll workpieces of racking in certain measurementZhenJiang OTL Storage Equipment CO.,LTD ZhangWeiguoAbstract: Cutting the cold-roll workpieces of racking in certain measurement is the most important part in the racking rollforming line ,It's mainly used to cut off the continuous workpieces according to the need of design ,The programmable logical controller replaced the traditional relay to control the system better in this design.

货架冷弯组件定尺剪切是货架冷弯成型生产线上的一个重要环节，它的主要作用是将连续生产的货架组件剪切成库房设计规划所要求的尺寸系列，传统的定尺剪切利用有接点的继电器来实现控制，为提高定尺精度，本文设计采用可编程序控制器取代传统接点继电器对系统进行改进。

Olivetti card" pneumatic feeders, Italy technology, with similar products unmatched precision, speed and a higher stability of positioning the needle can not meet your requirements of precision, more than 30, years, countless users the use of display,"olivetti card pneumatic nutrients may be similar products in the world's best products.

&好利牌&气动送料器，意大利技术，具有同类产品无可比拟的高精度，高速度和更高的稳定性，不用定位针就可达到您要求的精度，30多、年来，无数用户的使用显示，&好利牌&气动养料器可能是世界上同类产品中最好的产品。

Olivetti card" pneumatic feeders, Italy technologies, with similar products unmatched precision, speed and a higher stability of positioning the needle can not meet your requirements of precision, more than 30, years, countless users the use of display,"olivetti card pneumatic nutrients may be similar products in the world's best products.

&好利牌&气动送料器，意大利技术，具有同类产品无可比拟的高精度，高速度和更高的稳定性，不用定位针就可达到您要求的精度，30多、年来，无数用户的使用显示，&好利牌&气动养料器可能是世界上同类产品中最好的产品。

I do not cover the hard coat procedure because it is not in the "home brew" category due to the colder acid temperature and high current density that would be required to perform it.

我不涵盖电镀的流程，由于它的工艺流程的酸要求较低的温度下，而且需要很高电流，因此不属于&在家&可实现的类型。

The test results show that separation of antimony from lead by vacuum distillation is feasible,and metal antimony can be produced directly.

试验结果表明采用真空蒸馏分离铅锑的工艺是可行的，可一次得到产品锑，试验肯定了铅锑分离所需炉型，要求的材质及作业的技术条件。

For the tungsten-copper metallic matrix composites having tailorable TC and CTE properties in certain range, this investigation aims at with discussion of composition design, preparing methods selection and process parameters optimization to develop the key technology of W/Cu composites materials processing.

鉴于钨铜金属基复合材料具有低膨胀及高导热的优异特性，并且上述性能在一定范围内可实现调节控制的特点，故本研究旨在通过成分设计、制备方法选择及工艺参数优化的深入探讨，研究其关键的制备技术并制备符合封装热沉要求的材料。

Also because everybody gets to see the secret point extra... 14.9.2004 - Level 13 released Desperately wanted - no - demanded by many Ballance fans, we finally managed to finish an additional level available for free in our download section.

并且，因为大家得到见额外秘密的点… 14.9.2004 -第13级发布了 Desperately要-许多平衡风扇要求的NO-，我们最后设法完成一个另外的水平可利用免费在我们的下载部分。

The professor of sociology at the University of Kassel in Germany, added:"Few books, high TV consumption and high amounts of disposable cash add up to diminishing prospects of finishing school with the required academic grades."

德国Kassel大学的社会学教授补充说，&读书太少、看电视太多以及有太多的可任意使用的现金降低了孩子们以达到学校要求的学业水平完成学业的可能性。&

And Pharaoh spoke to Joseph, saying, Your father and your brothers have come to you.

47：5 法老对约瑟说，你父亲和你弟兄们到你这里来了。

Additionally, the approximate flattening of surface strip using lines linking midpoints on perpendicular lines between geodesic curves and the unconditional extreme value method are discussed.

提出了用测地线方程、曲面上两点间短程线来计算膜结构曲面测地线的方法，同时，采用测地线间垂线的中点连线和用无约束极值法进行空间条状曲面近似展开的分析。