1.
					
							four-quadrant D.C.converting circuit
						
					
					
						
						
					
					
						四象限直流变换电路
					2.
					
							Existance and Non-existance of Limit Cycle in the Fourth Quadrant of a Class of Cubic System;
						
						
						一类三次系统在第四象限极限环的存在性
					3.
					
							Research of Four-quardant Rectifier for Electric Power Locomotive Based on TMS320LF2407 DSP;
						
						
						基于TMS320LF2407 DSP电力机车四象限整流的研究
					4.
					
							Study of Control Method for Back-to-Back Four-quadrant Converter
						
					
					
						
						
					
					
						背靠背四象限变流器控制方法的研究
					5.
					
							Research on 4-quadrant rectifier power-fed test
						
					
					
						
						
					
					
						四象限整流器互馈功率试验方法研究
					6.
					
							Four-Quadrant DC speed regulation systems based on 6RA70
						
					
					
						
						
					
					
						基于6RA70控制的四象限直流调速系统
					7.
					
							Power Exchange Control of Back-to-Back Four-Quadrant Voltage Source Converter;
						
					
					
						
						
					
					
						背靠背四象限电压源型变流器功率交换控制
					8.
					
							Research on the Four-Quadrant Transducer Used for Hybrid Electric Vehicle;
						
					
					
						
						
					
					
						混合动力电动汽车用四象限能量转换器的研究
					9.
					
							The Control Strategies of Three-Lever Four Quadrant Pulse Rectifier;
						
					
					
						
						
					
					
						三点式四象限脉冲整流器控制策略研究
					10.
					
							The Research on the Method of Angle of Attack Measuring Based on Four-Quad Pressure Sensors;
						
						
						基于四象限压力传感器的迎角测量方法研究
					11.
					
							Research about Four-quadrant Combination of Lever--On Prudential Financial Idea;
						
					
					
						
						
					
					
						“杠杆”四象限调整搭配研究——基于稳健财务思想
					12.
					
							The Wooden Barrel Principle and Firms  Resource Allocation;
						
					
					
						
						
					
					
						“木桶原理”与企业资源配置的四象限分析方法
					13.
					
							The Development of Photon Beam Position Monitor System Based on Four-quadrant Detector
						
					
					
						
						
					
					
						基于四象限探测器的同步光位置测量系统研制
					14.
					
							High-pressure Four-quadrant Frequency System of Hiost in Flame-proof Shaft
						
					
					
						
						
					
					
						隔爆型矿井提升机高压四象限变频调速系统
					15.
					
							Study Four-Quadrant Detector in the Free Space Laser Communication
						
					
					
						
						
					
					
						自由空间激光通信四象限探测器性能研究
					16.
					
							Appaication of Four Quadrant Swich Magntic Resistance Speed Control Technologyin Shearer
						
					
					
						
						
					
					
						四象限开关磁阻调速技术在采煤机中的应用
					17.
					
							A novel control strategy for the PWM rectifier in cascaded multilevel converter
						
					
					
						
						
					
					
						四象限级联型多电平变换器的PWM整流器控制
					18.
					
							Influence of high power laser on four-quadrant laser guiding detector
						
					
					
						
						
					
					
						高能激光对四象限制导器件的影响分析