1)π networkπ网络
1.A kind of measurement principle of quartz crystal parameters in the π network is introduced.石英晶体谐振器电参数是石英晶体的主要技术指标,其测量方法有多种,基于π网络法石英晶体谐振器电参数测量原理,根据π网络分布参数对测量精度的影响,在测量电路中进行了硬件补偿;在理论分析的基础上设计和制作了π网络法石英晶体谐振器电参数测量电路,介绍了主要单元电路的设计,实现了石英晶体谐振器电参数测量并将测量系统应用于石英晶体频率微调设备中。
2.A quartz crystal units measurement system based on π network measuring method is introduced.在介绍π网络法石英晶体元件电气参数测量原理的基础上,设计了测量系统,并对π网络输出电压以及π网络两端电压之间相位差进行分析与建模,提出迭代法和对分法相结合的快速测量算法。
3.The system consists of control unit with advanced MCU and CPLD as core chips,frequency measuring unit based on zero phase technique in π network,USB interface,PC and so on.该测控系统由高性能单片机和CPLD为核心的系统控制单元、基于π网络零相位测试方法的频率测试单元、USB通信接口和PC机等组成。
英文短句/例句
1.Study on Quartz Resonator Parameters Detection System Based on π Network基于π网络石英晶体参数检测系统的研究
2.THE EQUIVALENT CONVERT BETWEEN T-CONNECTED AND π -CONNECTED NETWORK WITH SOURCE;含源T形网络与π形网络的等效变换
3.Study on the π-Complexation Adsorbents for Ethylene-Ethane Separation;乙烯—乙烷分离用π络合吸附剂的研究
4.Study of π-Complexation Adsorbent for Removal of Trace Amount of C_2H_4 from CO_2;脱除二氧化碳中微量乙烯π-络合吸附剂的研究
5.The Petri Net Based on the π-calculus and the Formal Analysis for Cryptographic Protocols;基于π-演算的Petri网和密码协议的形式化分析
6.Research on the Theory and Application of the State π Calculus Based Formal Verification for Grid Service Flows;网格服务流的状态π演算形式化验证技术研究与应用
7.Partial Wave Analysis of J/ψ→γπ～+π～-π～+π～-;J/ψ→γπ～+π～-π～+π～-的分波振幅分析
8.Internet computing[台]网际网络计算
9.interorganizational network组织间网络 组织间网络
10.network topology网络拓扑,网络布局
11.Network effects (network externalities)网络效应（网络外延性）
12.139002000Network ID 139139002000网络 id 139
13.Synthesis and Properties of D-π-A-π-D and D-π-A-π-A Photoelectrical Materials Based on Stilbene Derivatives;D-π-A-π-D和D-π-A-π-A均二苯乙烯类有机光电材料的合成及性能研究
14.The Stability of π-π Conjugated Molecules and Their Reactivity of Addition Reactionπ-π共轭的稳定性与加成反应活性
15.Study of J/Ψ→γπ~+π~-π~0;J/Ψ→γπ~+π~-π~0衰变的研究
16.π-Restrition, π-Induction, Kernels and Centers of Characters;特征标的π-限制与π-诱导、核与中心
17.The Color and Conjugation π→π~* Transition of Organic Compound;有机化合物的颜色与共轭π→π~*跃迁
18.General π-Frattini Subgroups of π-Solvable Group;π-可解群的广义π-Frattini子群
相关短句/例句
π-networkπ网络
1.Design of the measurement and control system of quartz crystal wafer sorting machine in a π-network;π网络石英晶片自动分选机测控系统设计
2.Error analysis and calibration of the crystal frequency measurement by π-network method;π网络法测量晶体频率的误差分析及校正
3.Research on Test Technology of Quartz Crystal Resonator by Method of π-network;π网络法石英晶体谐振器测试技术研究
3)network of π shapeπ形网络
4)π networkπ型网络
1.A quartz crystal units measurement system based on π network zero phase measuring method is introduced.在介绍π型网络零相位法石英晶体元件电气参数测量系统的基础上, 首次提出了使用级联直接数字合成器(DDS) 和倍频技术去解决π型网络测量所需高频高精度激励信号问题。
5)A-π bridge hydraulic resistance networkA型π桥液阻网络
6)π bridge resistance networkπ桥液阻网络
延伸阅读
π, π-conjugation分子式：CAS号：性质：单键和双键相互交替排列的共轭体系。最简单的为1,3-丁二烯，而苯分子则是一个具有高度对称结构的闭合共轭体系。除碳碳双键外，碳碳叁键、碳氧双键等，都可组成π,π-共轭。例如：CH2＝CH—C≡CH；CH2＝CH—CH＝O。由π,π-共轭引起的使分子内能降低、键长发生平均化等电子效应，称为π,π-共轭效应。
