The thesis analyses the signal of vibration and noise of water system in pump room through power frequency spectrum analysis and coherence analysis . meanwhile uses finite element method ( fem ) to investigate the characteristics of pipe system 论文通过功率谱分析、相干分析等方法对供水系统泵房内的管道系统进行振动与噪声信号的分析,用有限元的方法分析管道系统的结构特性。
The insert loss of the passive circuit is less than 3 . 5db , return loss better than 10db . the ammic5040 is used to drive the tga1141 , and the power is splited into two signals , each of these is to drive tag4517 . at the output port , the power is 4w 无源网络损耗小于3 . 5db ,回波损耗优于10db 。第一级放大器采用ammc5040以驱动tga1141 ,通过功率分配器将信号分为两路以驱动两路tga4517功率放大器。最后获得了4w连续波功率输出。
The measurement was made on a gas - solid fluidized bed in our laboratory . the pressure fluctuation signals were obtained and analyzed through power spectrum density . the relation of the particle size to pressure fluctuation and other parameters was studied by using fuzzy set theory 在实验室条件下对气-固流化床的颗粒进行了测量,通过功率谱密度对所获得的压力波动进行了分析,并应用模糊集理论对颗粒尺寸与压力波动及其它影响参数的关系进行了研究。
The directional routing protocol ds _ dsr put forward by the author is the improvement of the current protocol dsr , complete routine discovery and maintenance by directional neighbor nodes routing table , source routing and directional steering . the research discovers the application of the directional antenna , compare the omnidirectional antenna can increases the networks " total throughput , obviously reduces the co _ channel interference ( cci ) , multiple access interference ( mai ) , enlarges the nodes " signal and interference to noise ratio ( sinr ) , and because of the high gain of directional antenna can realize the communication with farther distance and less jump , end to end delay can decrease deeply , simultaneously , security of networks can be improved partially , the node energy also can be saved easily by power control 本文提出的定向路由协议ds _ dsr是基于对现有协议dsr的改进下实现的,通过定向邻节点路由表、定向源路由和定向搜索来完成路由发现与维护。研究发现,定向天线的应用,相比全向天线可明显提高网络的总的吞吐量,减少信道干扰、多址干扰,提高信干噪比,且由于定向天线的高增益可实现较远距离、较少跳数的通信,减少了路由发现时间,这样大大减小了传输时延,网络的整体性能得到了不同程度的提高,同时部分地解决安全问题,通过功率控制还可较容易的实现节能的目的。
Through power transmission , prism refraction and beam shifting experiments , various electromagnetic characteristics , such as refractive index , loss and s parameters , and various shaped left - handed material samples could be measured and verified between each other . 2 . the beam shifting experiment is designed and realized to further verify the lh properties 通过功率透射、棱镜折射和波束位移三种实验平台,可以对多种形状的异向介质材料的折射率、损耗等电磁特性进行准确的测量和相互验证; 2 、提出了波束位移实验以进一步验证介质材料的特性。
通过: pass through; get past; trav ...功率: power; rate of work; capacit ...通过功率测量仪: feed-through power meter通过功率测量仪器: feed through power meter过功率保: overpower protection过功率保护: overpower protection过功率的: overpowering过功率负荷: overpower波尖漏过功率: spike leakage power电弧漏过功率: arc leakage power过功率继电器: overpower relay过功率保护装置: overpower protection直接耦合漏过功率: direct coupled leakage power; direct-coupled power leakage通过式功率机: thru-line wattmeter通过: 1.(从一端到另一端) pass through; get past; traverse 通过边境 pass the frontier; 通过城镇 pass through a city; 通过障碍物 break the barriers; 一慢二看三通过。 pay attention to traffic safety; slow down, look around and then go ahead. 代表们通过大厅进入会场。 the delegates entered the assembly hall by way of the lobby.2.(同意议案) adopt; pass; carry 通过决议 adopt a resolution; pass a resolution; 提案以压倒多数通过。the motion was passed by an overwhelming majority.3.(以人、事物等为媒介) by means of; by way of; by; through 通过外交途径 through diplomatic channels; 通过协商取得一致 reach unanimity through consultation; 通过正当手段 by fair means4.(征得有关人员同意) ask the consent or approval of 通过群众 consult the masses功率: [物理学] power; rate of work; capacity factor; capacity; activity◇功率比 power rate; power ratio; 功率单位 power unit (p. u.); 功率范围 power bracket; power range; 功率放大 energy amplification; power amplification; powerman magnification; 功率分流 power dividing; 功率分配 power splitting; 功率负载 power termination; 功率管 power tube; power valve; 功率计 dynamometer; power meter; wattmeter; 功率减小 power reduction; 功率交换 power exchange; 功率输出 power output (p.o.); 功率输入 power input; 功率损耗 [电工] power attenuation; power loss; watt loss; power consumption肾小管滤过功能: glomerular filtrating function肾小球的滤过功能: glomerular filtration不通过: fail; no go; no pass; nogo; not go传递,通过: pass横过,通过: traverse即通过: rs-232c结束,通过: get through经,通过: via prep; viaprep经过,通过: pa through