方案比较

• Then , detail discusses were given on . finally , on the basis of above analysis and research , by comparing various design methods , a l band agile frequency synthesizer with 256mhz bandwidth and 1mhz resolution was designed , whose switching time was within 4 us . however , the spur performance is to be improved
  最后,在对各种捷变频技术综合分析和研究的基础上,经过反复的方案比较论证,设计了一个l波段256mhz带宽,步进为1mhz的捷变频频率合成器,捷变时间在4 s以内,不过杂散指标还有待进一步改进。
• Therefore , through comparing schemes , we select the ultralow power , high integration msp430f43x series microcontrollers as the center . on software , we take full advantage of the low power modes of the mcu to finish the task in isr ( interrupt service routine ) , so , the power of system rest with the isr executive time
  因此，在硬件选择上，通过方案比较，选用微功耗、高集成度的msp430f43x系列单片机作为控制核心；在软件设计上，充分利用所选单片机的低功耗模式，让检测任务在中断服务程序中完成，使系统的功耗主要取决于中断服务程序执行的时间。
• First the author introduces the design of the flame monitoring system based on pic16f877 mcu in details . the detector , ( ecadata company ’ s production ) , si - photodiode , is used as the sensor . its photoelectric current output is proportional to input light ’ s energy
  经方案比较,决定选用基于火焰的红外光谱辐射特性的火焰检测原理,研制开发火焰监测系统,检测元件选择ecadata公司生产的红外雪崩型硅光电二极管,光电二极管在接受红外辐射时,其产生光电流的大小与入射光能量成正比。
• With the input of a great number of data and survey information , the mcgdm system adjusted the criteria , comparative importance and weight while taking into consideration of various qualities and quantities such as shipping cost , investment scale , construction condition and development potentials , etc . the comments and recommendations on the options were resulted and a quantitative comparison became possible . it not only analyzed the cost of each option but also optimized the local container transportation network by comparing the shipping cost of each option , with the help of transportation network optimizing model and other techniques
  本文还运用了多准则群决策分析方法，以大量数据信息采集和多个专家意问卷调查为基础，对各个基本准则和评价指标相对重要程度、权值进行了综合处理，同时有机的融合了包括运输费用、投资规规模、建港条件、发展前景等各种定量和定性分析的指标，提出了布局方案选择的推荐意见，为规划方案比较提供了量化比选依据，为大型集装箱港口规划探索了一种更有效的方法和更科学的规划工作模式。
• The study shows that the deck excavation schemes is good than the bench stoping schemes by calculation of limit equilibrium method and the sliding mass to the excavation the slide up to el 790m is in stabilization under vii earthquake intensity with there dimensional finite element method by means of computer simulation and calculation . ,
  研究结论是，从刚体极限平衡法的计算结果分析，台阶式开挖方案和整体开挖方案比较，整体开挖方案比较明显要好于台阶式开挖方案。为了保证工程的安全性，同时兼顾工程开挖措施的经济性，建议重点考虑开挖高程为790m的整体开挖方案。
• Contrast to the observation data , the numeration is approach to the fact . ( 5 ) through studying the real instance of huxi bank , put forward to corresponding reinforcement project . the result indicates that the reinforcement can satisfy the request of coast and penetrating stabilization
  ( 5 )针对湖西大堤的实际情况，经过方案比较，提出了相应的加固措施，对土工膜的选择进行了计算，并对各种工况进行了校核，结果表明，加固措施可以满足大堤的滑坡稳定和渗透稳定要求。
• This article uses fuzzy set to determine limited water level of flood control , and compares it with the real control way . it provides strong theoretical base for the determination of limited water level of flood control for yinhe reservoir . through many years run , yinhe reservoir " s conflict is profit
  用模糊集分析法确定防洪限制水位，并将其与实际运用方案比较，为音河水库的汛限水位的确定提供较强的理论依据，为提高水资源的可利用量，缓解水库防洪兴利之间的矛盾提供了理论依据。
• Finally , author analyzed and compar ed these two schemes on the aspects of technology and economy according to the wholly structure optimizing process and outcome , and recommended the final scheme of the right bank ' s diversion tunnel of gongboxia power station reconstructed into a horizontal swirling flow internal dissipater tunnel
  最后根据整个体型优化过程与结果，从技术与经济对比分析两个方面，对公伯峡右岸旋流泄洪洞进行了选型研究与方案比较，提出了公伯峡水电站右岸旋流内消能泄洪洞的最终推荐方案。
• The function of the software is useful , it has provided many functions such as the calculate of crop water requirement , pipeline layout ( automatic layout and manual operation ) and its optimization , pipe diameter optimization . investment budgetary estimate and economic beneficial result can be result . and can rapid create plan and do plan comparison , the software provides many kinds of result output such as graph . text , table and so on
  该系统可以实行作物需水量计算，系统设计流量推算、管道水力计算、工程投资概算，经济效益分析等功能，建立了常用的数据库(管材、管件、水泵和电机等)并对其进行管理和维护，可以实现包括管道布置、管径优化、管材选择等多种参数选择在内的多种方案比较、优选。系统能提供图形、文本、表格等多种形式的成果输出，人机交互界面友好，操作方便。