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双工质塑料冷混机设计研讨
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作者 张尉 胡新民 《橡塑技术与装备》 CAS 2002年第1期41-43,共3页
介绍了可提高塑料混合时冷却效率的双工质塑料冷混机,并简要叙述了立式、卧式和立式搅龙双工质冷混机冷却装置冷却物料的工序。
关键词 双工质冷混 塑料 混合 冷却效率 冷却 设计
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基于双工控机模式的混合车道系统设备控制的设计与实现
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作者 李计管 张建文 《中国交通信息化》 2017年第4期134-137,共4页
本文论述了在基于双工控机模式的混合车道系统中的设备控制的设计与实现。在基于双工控机模式的混合车道系统中,ETC与MTC系统互相独立,在不改动原MTC系统软件的前提下,只需对外围设备的接线方式稍作修改,再而结合一系列的设备控制和切... 本文论述了在基于双工控机模式的混合车道系统中的设备控制的设计与实现。在基于双工控机模式的混合车道系统中,ETC与MTC系统互相独立,在不改动原MTC系统软件的前提下,只需对外围设备的接线方式稍作修改,再而结合一系列的设备控制和切换逻辑来达到以下目的:系统可根据车辆的通行位置和状态来向车辆提供针对性的处理服务,如向ETC车辆提供ETC处理服务,向非ETC车辆或未能正常交易的ETC车辆提供MTC处理服务。 展开更多
关键词 混合车道 双工模式 设备控制
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利用两台单工机实现通信中转的方法
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作者 刘小钢 《气象与减灾研究》 1997年第2期47-48,共2页
关键词 单工 B A 双工机 话音信号 与非门 通信 发射状态 接收状态 转台
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ANALYSIS OF WORKING MODES OF HYBRID EXCITATION DOUBLY SALIENT MOTOR 被引量:2
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作者 秦海鸿 赵志英 +1 位作者 龚春英 严仰光 《Transactions of Nanjing University of Aeronautics and Astronautics》 EI 2006年第4期264-271,共8页
A more accurate analysis method on working modes is proposed by considering the winding terminal voltage and the eondueting power device as state parameters. For the three-phase hybrid excitation doubly salient machi... A more accurate analysis method on working modes is proposed by considering the winding terminal voltage and the eondueting power device as state parameters. For the three-phase hybrid excitation doubly salient machine (HEDSM) motor and its three-phase full-bridge inverter, in the proposed analytical method, all possible working modes are generally listed. Then, with the H_PWM-L_ON control strategy, the working modes are detailed with eorresponding equivalent circuits. Experimental results verify the robustness of the analysis. 展开更多
关键词 hybrid excitation doubly salient motor working mode COMMUTATION current tail
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林区森林防火无线电通信工程的研究 被引量:2
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作者 施建明 《信息技术》 2005年第8期159-160,共2页
关键词 林区 森林防火 无线电通信工程 通讯网 通信质量 双工机
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UP-450D无线双工转信机插入有线网系统的应用
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作者 周静 《重庆通信学院学报》 1998年第1期27-30,共4页
本文介绍了一种利用UP-450D有无线接口设备插入有线网的方案。
关键词 UP-450D无线双工转信 FTH-7005手持 FTL-7002车载台 有线网
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Coverage Probability Analysis for Full-Duplex Relay Aided Device-to-Device Communications Networks 被引量:2
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作者 Bin Zhong Jiajia Zhang +1 位作者 Qian Zeng Xiaoming Dai 《China Communications》 SCIE CSCD 2016年第11期60-67,共8页
The coverage probability of both the cellular users and the Device-to-Device(D2D) users are analyzed. We assume that the cellular users are able to communication with the Base Station(BS) either by relying on the assi... The coverage probability of both the cellular users and the Device-to-Device(D2D) users are analyzed. We assume that the cellular users are able to communication with the Base Station(BS) either by relying on the assistance of Full-Duplex(FD) mode relays or via direct user-to-BS links with high-enough Signal-to-Interference-plus-Noise-Ratio(SINR). Note that the FD-mode devices are capable of simultaneously operating in two modes,i.e. the D2D mode and the cooperative relay mode,with the sum power consumption at these devices kept constant. The closedform expressions for coverage probability of both tier users are derived. After that,numerical analyses are provided,showing that the coverage probability of the both the cellular and the D2D users can be substantially influenced by a variety of parameters,including the power allocation factor of the relays,the density of users,and the self-interference imposed on the FD mode relays,etc. Furthermore,in the D2D enabled networks,it is shown that the FD relay aided transmission is beneficial to enhancing the coverage probability of the cellular users if the target SINR is lower than 5 d B. 展开更多
关键词 cooperative communication coverage probability Full-duplex device-to-device
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Two Different Role Division Control Strategies for Torque and Axial Force of Conical Bearingless Switched Reluctance Motor 被引量:1
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作者 HAO Zhenyang MIAO Wei +1 位作者 CAO Xin ZHANG Qiyao 《Transactions of Nanjing University of Aeronautics and Astronautics》 EI CSCD 2020年第6期848-857,共10页
Although the five-degree-of-freedom magnetic levitation system composed of two conical bearingless switched reluctance motors(CBSRMs)owns the simplest structure,the torque and levitation forces are coupled greatly.The... Although the five-degree-of-freedom magnetic levitation system composed of two conical bearingless switched reluctance motors(CBSRMs)owns the simplest structure,the torque and levitation forces are coupled greatly.Therefore,it is difficult to make the rotor rotate and be fully levitated simultaneously.To solve this problem,two different role division control strategies are proposed in this paper,i.e.individual role division and mutual role division control strategies.The difference between them is the selection of motor which controls the torque or the axial force.In order to understand the characteristics of control variables,the principle and mathematical model of CBSRM are introduced.After that,two control strategies are explained in detail.To verify the demonstrated performance,the simulations are completed with MATLAB/Simulink. 展开更多
关键词 five-degree-of-freedom magnetic levitation conical bearingless switched reluctance motor(CBSRM) individual role division control mutual role division control
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A novel method to improve interfacial bonding of compound squeeze cast Al/Al-Cu macrocomposite bimetals:Simulation and experimental studies 被引量:6
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作者 Mohammad Hossein BABAEE Ali MALEKI Behzad NIROUMAND 《Transactions of Nonferrous Metals Society of China》 SCIE EI CAS CSCD 2019年第6期1184-1199,共16页
A facile and innovative method to improve bonding between the two parts of compound squeeze cast Al/Al-4.5 wt.%Cu macrocomposite bimetals was developed and its effects on microstructure and mechanical properties of th... A facile and innovative method to improve bonding between the two parts of compound squeeze cast Al/Al-4.5 wt.%Cu macrocomposite bimetals was developed and its effects on microstructure and mechanical properties of the bimetal were investigated.A special concentric groove pattern was machined on the top surface of the insert(squeeze cast Al-4.5 wt.%Cu) and its effects on heat transfer,solidification and distribution of generated stresses along the interface region of the bimetal components were simulated using ProCAST and ANSYS softwares and experimentally verified. Simulation results indicated complete melting of the tips of the surface grooves and local generation of large stress gradient fields along the interface. These are believed to result in rupture of the insert interfacial aluminum oxide layer facilitating diffusion bonding of the bimetal components. Microstructural evaluations confirmed formation of an evident transition zone along the interface region of the bimetal. Average thickness of the transition zone and tensile strength of the bimetal were significantly increased to about 375 μm and 54 MPa, respectively, by applying the surface pattern.The proposed method is an affordable and promising approach for compound squeeze casting of Al-Al macrocomposite bimetals without resort to any prior cost and time intensive chemical or coating treatments of the solid insert. 展开更多
关键词 Al/Al-4.5wt.%Cu macrocomposite bimetal interfacial bonding surface machining pattern microstructure mechanical properties simulation
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