Test work on quick selective flotation of Yongping copper ore with open-circuit 铜快速-开路优先浮选永平铜矿石的试验研究
Technology of selective electroless nickel plating& gold immersion for printed circuit board 印刷线路板中的选择性化学镍金技术
After an experiment based on three stages and three principle circuits, the selective circuit of useful minerals and the selective index which the ores in different types and grades can reach are defined. The circuits and the index provide a basis for industrial experiments and mine designs. 通过三个阶段、三个原则流程的试验后,确定了有用矿物的选别流程和不同类型、不同品位的矿石可能达到的选别指标,为工业试验及矿山设计提供了依据。
This paper describes a new hybrid neutral point treatment for 3~ 66 kV auxiliary power network, which integrates the selective protection for switching off earth short circuit and two sets of AC metal-oxide surge arresters without gaps at different protection level. 介绍了新型混合式3~66kV自备电网中性点接地方式。这种中性点接地方式加上了接地短路切除动作的选择保护,以及两组不同保护水平的交流无间隙金属氧化物避雷器。
A new selective precharge structure with charge compensation circuit proposed in this paper was adopted, and the power dissipation was significantly reduced. 该ROM采用本文提出的带充电补偿电路的选择性预充电结构,取得了明显的功耗优化效果。
First, the conventional flotation method was used in the test, and pilot studies about the smelting iron slag included selective test of collectors, selective test of regulators, condition test of roughing, tests of concentrating, scavenging, open circuit and closed circuit. 试验首先采用常规的浮选方法对此次改性高炉渣进行了探索性试验,其中包括捕收剂选择试验、调整剂选择试验、粗选条件试验、精选试验、扫选试验、开路试验及闭路试验。
This paper proposes a new intelligent selective electric leakage protect device using DSP, based on detailed analysis of electrical leakage protect equipment of Coal Preparation Plant with 660V.In addition, it also presents the idiographic design of relating hardware circuit and software are block diagram. 在分析现有660V选煤厂漏电保护装置的基础上,提出了一种基于DSP的智能化选择性漏电保护系统的实现原理,并且给出了相应的硬件设计和软件程序框图。
A new method of selective detection of the current leakage faults and it's implementation circuit 一种新的选择性漏电故障判别方法及实现电路
Protective devices for short-circuit and earthing fault of water-pump and wind-motor should select non-selective equipment type distribution circuit-breaker which can meet starting requirements of motor. 消防水泵、风机的短路保护和接地保护电器宜选择满足电动机启动要求的非选择性装置式配电型断路器。
The invention of the BNRT has provided a new selective high-speol switching device for pulse circuit and system, thus greatly increasing the flexibility of the design of circuits. BNRT的出现,为脉冲电路和系统的设计,提供了一种新的高速开关器件,大大增加了电路设计的灵活性。
CMOS Wide-band Transconductor and A High Q VHF Frequency Selective Circuit CMOS宽带互导器及高Q值VHF选频电路
Selective gold plating suitable to the frame of integrated circuit and the newly developed pulse gold plating are also reviewed. 介绍了酸性镀金、中性镀金、碱性镀金和无氰镀金等四种镀金工艺以及适用于集成电路框架的选择性镀金和最近新发展起来的脉冲镀金。
The design principle of the current tranducer and the selective amplifier of ajustable central frequency has been discussed, the paper also introduces the circuit constitution and technique parameters. 讨论了电流传感器和中心频率可调的选频放大器的设计原理,并介绍了电路组成及技术参数。
An Efficient Analysis for Frequency Selective Surfaces Using Equivalent Circuit Model 应用等效电路模型的频率选择表面有效分析
Intelligent is the key technology of the third generation of circuit breaker, which includes the principle of current detection, the realization of a variety of selective protection and the design of circuit scheme. 断路器的智能化即为第三代断路器的关键技术,它包括电流检测原理、多种选择性保护的实现及电路方案的确定等。
The third chapter introduced the periphery circuit of the system, including the configuration circuit of FPGA, the digital to analog convertor module, the selective filter circuit and the power amplifier circuit. 第三章主要介绍了系统外围硬件电路的设计,包括FPGA配置电路、数模转换模块、选择性滤波电路和功率放大电路。