The developing and debugging process of " the simultaneously acquisition system of cylinder pressures for multi - cylinder spark ignition engines " were introduced in detail in this thesis . the experimental results of 492qc and 492wqb engine using this acquisition system were introduced too 本文详细介绍了“火花点火式多缸发动机缸内压力同时采集系统”的开发、调试过程及其应用于492qc 、 492wqb发动机上的实验结果。
With practical engineering examples , this paper deals with the collection of surface wave signal along with seismic refraction exploration , the utilization of surface wave components to make analysis during data processing , the thickness division of overburden bed , strongly - weathered bed , intermediately - weathered bed and weakly - weathered bed in combination with the refraction data , and mutual reflection and interpretation of the burial condition of the bedrock surface 笔者结合工程实例，介绍了在地震折射勘探中同时采集面波信号，在资料处理时利用面波组份进行分析，配合折射资料对测区覆盖层、强风化层、中风化层及弱风化层厚度进行划分，同时相互映证解释基岩面的埋藏情况。
In light of current using situation and drawing on the experience of many scholars researched methods and viewpoints , this thesis made com land , fallow land , orchard , grass land as experimental field in black soil region jlau , which carried out experiment by applying different amounts of n and p fertilization in corn field . by means of collecting the samples of rainfall runoff , erosion silt and surface layer soil before and after rainfall for one year nature precipitation in field , we study the effect of surface runoff on n and p nutrient and fertility degeneration . the results showed : ( l ) there are lots of factors which affect soil erosion and losses of n and p , in which rainfall and rainfall intensity were more important , while rainfall intensity is the most important meteorological phenomena factor 针对当前黑土利用现状，本文借鉴众多学者的研究方法和观点，在吉林农大黑土区选择利用方式不同的玉米地、休闲地、果园、草地，在玉米区进行了不同数量的施肥，通过野外试验，采集一年自然降雨产流及泥沙样品，同时采集降雨前后的耕层土壤样品，研究了黑土区地表径流对氮磷养分特征及肥力退化的影响，结果表明：土壤侵蚀和氮磷的流失受诸多因素的影响，降雨量、降雨强度是重要因子，而降雨强度是影响农田地表径流养分流失的最重要的气象因子，特别是暴雨，暴雨径流中氮磷浓度较平时高得多；随作物生长，覆盖度逐渐增加以及不同利用方式下表现的覆盖度差异，氮磷流失都表现为显著的差异。
It realizes the cooperates detection of electrocardiogram and pulse gram . it collects twelve lead electrocardiogram and pulse gram , display them on the screen at the same time , analyses and hands with electrocardiogram and pulse gram , obtains patients " hemodynamics parameters and electrocardiogram parameters , provides references for doctors " diagnosing . according to the results of detection , it provides suggestion or diagnosing references , as well as printing good diagnosis reports 他实现了心电图和脉图同时配合检查，系统同时采集病人的十二导联心电图和脉搏图，实时在屏幕上进行显示，可随时能够对脉图和心电图波形进行分析处理，来获得病人的血流动力学参数和心电图参数，为医生提供诊断与抢救的依据，并且能够根据检查结果自动为医生提供诊断建议或进行诊断咨询，并打印结果报告。
The world will continue to make extensive use of fossil fuels , such as natural gas and coal , for power generation for the foreseeable future , but technology now allows this to be done more cleanly by creating hydrogen from fossil fuels while capturing and sequestering the carbon as carbon dioxide in deep geological formations 在可预见的未来，全球仍将继续大规模使用天然气和煤等化石燃料发电，但现在的技术使得这一切可以完成得更洁净，就是通过从化石燃料中制造氢气，同时采集和储存碳，因为二氧化碳在地质组成较深的地方。
The main chip of the usb interface circuit is a cypress semiconductor ' s product , cy7c64613 , which has intergrated usb sie ( serial interface engine ) and enhanced 8051 . the oscilloscope module is realized according to the real time sampling principle . it has two signal chunnels and a dual 8 - bit dual a / d converter whose most sampling rate is 40msps , so two signal acquisition can occurs in the same time 随后介绍虚拟仪器测试平台中各硬件模块设计实现： usb接口的主芯片是cypress公司的cy7c64613 ，此芯片集成了usbsie和8051核；示波器模块根据实时取样原理实现，采用双8位a / d转换器，提供两条信号通道，可以同时采集双路信号，最高的采样率为40mhz ；信号源模块采用直接数字合成( dds )原理实现，它所能产生的信号频率为10hz 5mhz ，最小频率分辨率为9 . 537hz 。
