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中职电工技术基础教学中的设疑技巧探究 认领
1
作者 杨桂敏 《成才之路》 2021年第3期70-71,共2页
教师在教学中要通过设疑的方法,激发学生的求知欲望,有效提升电工技术基础教学质量。文章主要以部分电路欧姆定律为例,分析设疑在电工技术基础教学中的作用,探讨电工技术基础教学中的设疑技巧,指出教师要引导学生质疑、在教学活动中巧... 教师在教学中要通过设疑的方法,激发学生的求知欲望,有效提升电工技术基础教学质量。文章主要以部分电路欧姆定律为例,分析设疑在电工技术基础教学中的作用,探讨电工技术基础教学中的设疑技巧,指出教师要引导学生质疑、在教学活动中巧妙设疑、注重自身的设疑技巧,不断提高学生的学习效率。 展开更多
关键词 中职 电工技术基础 设疑 电路 欧姆定律
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基于FPGA的多通道液面检测电路 认领
2
作者 朱思彪 王景存 +1 位作者 危霞 匡政政 《自动化与仪表》 2021年第1期62-67,共6页
在全自动生化分析仪中,提高样本吸液(采样)精度是降低污染率、防止空吸、提高分析精度的重要因素之一。为了提高液面检测精度,设计了一种基于FPGA控制的多通道液面检测电路。将采样针和样本作为电容式液面传感器,采用FPGA完成对多路电... 在全自动生化分析仪中,提高样本吸液(采样)精度是降低污染率、防止空吸、提高分析精度的重要因素之一。为了提高液面检测精度,设计了一种基于FPGA控制的多通道液面检测电路。将采样针和样本作为电容式液面传感器,采用FPGA完成对多路电容式传感器电容变化的检测、信号变换放大和A/D转换输出的控制,实现了精确采样,提高仪器性能的目标。详细介绍了电路的设计思路和实现方法,经过试验验证,该电路具有稳定性好、可靠性高的特点。 展开更多
关键词 液面检测 多通道 电容式传感器 电路 FPGA
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Research on Simulation Methods of Electric Field Intensity on Surface of 10 kV Cable Joint 认领
3
作者 Ruxin Zhang Jun Xiong +9 位作者 Zheng Wu Lei Liao Mingyan Wu Gang Du Xueyou Huang Wenpei Jin Haiming Li Jian Zhang Wenli Cheng Binxian Lu 《能源与动力工程(英文)》 2020年第4期37-45,共9页
The electric field intensity (EFI) is important characteristic quantity for evaluating the internal insulation state of cable joints. Based on finite element method, this paper proposes two EFI research methods, field... The electric field intensity (EFI) is important characteristic quantity for evaluating the internal insulation state of cable joints. Based on finite element method, this paper proposes two EFI research methods, field-circuit coupling method and equivalent circuit method. The average EFI of the inner surface of the outer semi-conducting shield can be calculated from the current in the measuring circuit. The relative error between these two methods is about 15%, which roughly proves the consistency of the two methods. Further practical application research enables online monitoring of cable joints. 展开更多
关键词 Cable JOINTS Electric FIELD INTENSITY EQUIVALENT CIRCUIT METHOD Field-Circuit Coupling METHOD Finite Element Simulation Software
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Model Design of Electrically Erasable EEPROM Memory Cell 认领
4
作者 Lei Zhao 《电脑和通信(英文)》 2020年第4期72-80,共9页
This article introduces an EEPROM memory cell model that is different from the equivalent capacitance model. This model uses high-frequency components in circuit design, including MOS transistors, zener diodes, resist... This article introduces an EEPROM memory cell model that is different from the equivalent capacitance model. This model uses high-frequency components in circuit design, including MOS transistors, zener diodes, resistors, capacitors, etc., and builds a model that can be used in most analog environments. The simulation of the transient process of write and read operations helps designers understand the working principle of EEPROM, and it can also be applied to the overall circuit design. According to the structure and working principle of the EEPROM cell device, a model of its equivalent circuit is established, and the read, write, and erase operations of the EEPROM cell are transiently simulated using this model. The simulation results verify the correctness of the model. 展开更多
关键词 EEPROM MEMORY CIRCUIT DESIGN CIRCUIT SIMULATION
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Dynamic Cerebral Microdialysis during Pallidotomy and Thalamotomy in Parkinson’s Disease: A Preliminary Neurochemical Study 认领
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作者 Sergio A. Sacchettoni Juan P. Abud +7 位作者 Napoleon Torres Yngo García Daniel A. Onay Juan Luis Rodulfo Juan Félix Del Corral Pedro Rada Rafael Galera Luis Hernández 《现代神经外科学进展(英文)》 2020年第2期284-296,共13页
In Parkinson’s disease (PD), dopaminergic neurons reduce the regulation of glutamatergic (glutamate-Glu) input from the cortex to neostriatum (caudate and putamen nuclei) consequently leading to a hyperactivity of gl... In Parkinson’s disease (PD), dopaminergic neurons reduce the regulation of glutamatergic (glutamate-Glu) input from the cortex to neostriatum (caudate and putamen nuclei) consequently leading to a hyperactivity of globus pallidus internae (GPi) neurons that release gamma-amino-butyric acid (GABA) into the thalamic ventrolateral (VL) nucleus. The objective of the present experiment was to measure changes in GABA and Glu in the caudate and the thalamus of 2 patients during the application of electrical stimuli following either a pallidotomy or a thalamotomy. Proper insertion of the electrode was tested by applying high frequency electrical pulses (HFEP). During these procedures, we obtained neurochemical information placing cerebral (CMD) microdialysis probes in caudate nucleus and VL nucleus of ipsi- and contra-lateral thalamus. In VL thalamus, extracellular GABA decreased during HFEP, tending to reach previous levels once HFEP was finalized. Following the pallido- or thalamotomy GABA decreased again. Similarly, in the contralateral VL thalamus, extracellular GABA levels showed a similar but less pronounced profile but did not show any decrement after the lesion. Caudate Glu decreases when HFEP is applied to the GPi and recovers to previous levels after HFEP, but did not decrease again after lesion (GPi-tomy), instead it continued to rise. These results suggest that HFEP exerts a similar but reversible biochemical effect as thermopallido- or thermothalamotomy on GABA extracellular concentration in the ipsilateral VL thalamus. We also observe a distant effect of HFEP, but not of thermolesion, on contralateral thalamic GABA and ipsilateral caudate Glu. 展开更多
关键词 CEREBRAL MICRODIALYSIS Parkinson’s Disease PALLIDOTOMY Thalamotomy BASAL GANGLIA Circuit CEREBRAL Electromodulation DBS
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Structural Design of an Electrically Erasable EEPROM Memory Cell 认领
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作者 Lei Zhao 《世界工程和技术(英文)》 2020年第2期179-187,共9页
EEPROM is an electrically erasable and programmable memory. The technology is mature and stable with low cost, so it is the mainstream in the application of electronic products in daily life. People use it in every wa... EEPROM is an electrically erasable and programmable memory. The technology is mature and stable with low cost, so it is the mainstream in the application of electronic products in daily life. People use it in every way. In the fields of personal identity card, bank card, medical insurance card, traffic card and other smart cards, which are closely related to personal property, and in the field of communication system and other consumer electronic products such as PDA and digital camera, EEPROM is used. In instruments and other embedded systems, such as smart flowmeters, it is usually necessary to store information such as setting parameters, field data, etc., which requires that the system is not lost when it is powered down so that the data you originally set could be restored next time. Therefore, a certain capacity of?EEPROM.?Through the storage or release of electrons on the floating gate tube of the memory cell, the memory appears to be on or off when the floating gate tube is read, so its logic value will be judged as “0”?Or?“1”. The definition of logic “0” or “1” varies depending on the logical design of the product. This work designs a memory cell consisting of two transistors. The NMOS tube is used as a selection tube and controlled by the word line. It can withstand a part of the high voltage and reduce the probability of breakdown of the ultra-thin oxide layer of the floating gate transistor. As a storage tube, the EEPROM device model designed in this paper can work well through the tunnel oxide layer to store data, achieving better storage functions, higher work efficiency, and lower power consumption. 展开更多
关键词 EEPROM MEMORY Storage ARRAY Digital LOGIC Control CIRCUIT
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Investigation into the transient flow characteristics of noble gas propellants using the pulsed inductive discharge in electric propulsion 认领
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作者 Yuguo CHENG Guangqing XIA 《中国航空学报:英文版》 SCIE EI CAS CSCD 2020年第9期2329-2341,共13页
The Pulsed Inductive Thruster(PIT)has the advantages of repeatable startup,no corruption and in-situ propellant feed.To study the flow expansion and circuit characteristics of PITs,the circuit-fluid model is developed... The Pulsed Inductive Thruster(PIT)has the advantages of repeatable startup,no corruption and in-situ propellant feed.To study the flow expansion and circuit characteristics of PITs,the circuit-fluid model is developed,and the high temperature thermodynamic and transport models are combined with the circuit-fluid model to predict the critical plasma parameters.The flow fields of initial mass of 2–8 mg and charge voltages of 10–14 k V are simulated.Comparison of the flow fields of argon and helium propellants suggests that,the flow field structures are similar.Slight differences exist on the magnitude of the density and magnetic field,caused by larger velocity in lighter atom case and difference on the ionization gap between adjacent ionization levels.Analysis of the circuit characteristics by the two-dimensional results indicates that the ratio of coil inductance to circuit inductance affects both the rise rate and phase of the plasma current,the larger the ratio,the greater the rise rate and the better the following characteristic.The calculations show that the magnetic energy obtained within the decoupling distance determines the overall performance the thruster can be obtained;self-induced field maintained by the thermal motion after the main pulse leads to the long attenuation process and difference on the total impulse when the angle of conical pylon is varied under constant coil dimension. 展开更多
关键词 Argon and helium propellants Circuit characteristics Circuit-fluid model Flow properties Pulsed inductive thruster
Characterization of a New DC-Glow Discharge Plasma Set-Up to Enhance the Electronic Circuits Performance 认领
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作者 A. A. Talab Ashraf Yahia +1 位作者 M. A. Saudy M. Elsayed 《现代物理(英文)》 2020年第7期1044-1057,共14页
The (DC-GDPAU) is a DC glow discharge plasma experiment that was designed, established, and operated in the Physics Department at Ain Shams University (Egypt). The aim of this experiment is to study and improve some p... The (DC-GDPAU) is a DC glow discharge plasma experiment that was designed, established, and operated in the Physics Department at Ain Shams University (Egypt). The aim of this experiment is to study and improve some properties of a printed circuit board (PCB) by exposing it to the plasma. The device consists of cylindrical discharge chamber with movable parallel circular copper electrodes (cathode and anode) fixed inside it. The distance between them is 12 cm. This plasma experiment works in a low-pressure range (0.15 - 0.70 Torr) for Ar gas with a maximum DC power supply of 200 W. The Paschen curves and electrical plasma parameters (current, volt, power, resistance) characterized to the plasma have been measured and calculated at each cm between the two electrodes. Besides, the electron temperature and ion density are obtained at different radial distances using a double Langmuir probe. The electron temperature (<em>KT<sub>e</sub></em>) was kept stable in range 6.58 to 10.44 eV;whereas the ion density (<em>ni</em>) was in range from 0.91 × 10<sup>10</sup> cm<sup><span style="white-space:nowrap;">&minus;</span>3</sup> to 1.79 × 10<sup>10</sup> cm<sup><span style="white-space:nowrap;">&minus;</span>3</sup>. A digital optical microscope (800×) was employed to draw a comparison between the pre-and after effect of exposure to plasma on the shaping of the circuit layout. The experimental results show that the electrical conductivity increased after plasma exposure, also an improvement in the adhesion force in the Cu foil surface. A significant increase in the conductivity can be directly related to the position of the sample surfaces as well as to the time of exposure. This shows the importance of the obtained results in developing the PCBs manufacturing that uses in different microelectronics devices like those onboard of space vehicles. 展开更多
关键词 DC Glow Discharge Paschen Curve Cold Plasma Characteristics Double Electric Probe Printed Circuit Board (PCB) Properties Electronic Plasma Application
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Experimental Measurement of Minority Carriers Effective Lifetime in Silicon Solar Cell Using Open Circuit Voltage Decay under Magnetic Field in Transient Mode 认领
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作者 Alain Diasso Raguilignaba Sam +1 位作者 Bernard Zouma François Zougmoré 《智能电网与可再生能源(英文)》 2020年第11期181-190,共10页
<span style="font-family:Verdana;">This manuscript presents a simple method for excess minority carriers’ lifetime measurement</span><span style="font-family:""> </span&g... <span style="font-family:Verdana;">This manuscript presents a simple method for excess minority carriers’ lifetime measurement</span><span style="font-family:""> </span><span style="font-family:""><span style="font-family:Verdana;">within the base region of p-n junction polycrystalline solar </span><span style="font-family:Verdana;">cell</span></span><span style="font-family:""> </span><span style="font-family:Verdana;">in transient mode.</span><span style="font-family:""> </span><span style="font-family:Verdana;">This work is an experimental transient</span><span style="font-family:Verdana;"> 3-Dimensionnal study.</span><span style="font-family:""> </span><span style="font-family:Verdana;">The magnitude of the magnetic field B is varied from 0 mT to 0.045 mT. Indeed, the solar cell is illuminated by a stroboscopic flash with air mass 1.5</span><span style="font-family:""> </span><span style="font-family:Verdana;">and under magnetic field in transient state.</span><span style="font-family:""> </span><span style="font-family:Verdana;">The experimental details are assumed in a figure. The procedure is outlined by the Open Circuit Voltage Decay analysis. Effective minority carrier life-time is calculated by fitting the linear zone of the transient voltage decay curve</span><span style="font-family:""> </span><span style="font-family:Verdana;">because linear decay is an ideal decay. The kaleidagraph software permits access to the slope of the curve which is inversely proportional to the</span><span style="font-family:""> </span><span style="font-family:Verdana;">lifetime. The external magnetic effects</span><span style="font-family:""> </span><span style="font-family:Verdana;">on minority carriers’ effective lifetime </span><span style="font-family:Verdana;">is</span><span style="font-family:Verdana;"> then</span><span style="font-family:""> </span><span style="font-family:Verdana;">presented and analyzed.</span><span style="font-family:""> </span><span style="font-family:Verdana;">The analysis show</span><span s 展开更多
关键词 Carrier Lifetime FITTING Magnetic Field Open Circuit Voltage Decay
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Quad-Band Rectenna for RF Energy Harvesting System 认领
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作者 Dalia Elsheakh Mina Farouk +1 位作者 Hala Elsadek Hani Ghali 《电磁分析与应用期刊(英文)》 2020年第5期57-70,共14页
The design of multiband microstrip rectenna for radio frequency energy harvesting applications is presented in this paper. The designed antenna has good performance in the GSM-900/1800, WiFi and WLAN bands. In additio... The design of multiband microstrip rectenna for radio frequency energy harvesting applications is presented in this paper. The designed antenna has good performance in the GSM-900/1800, WiFi and WLAN bands. In addition, the rectifier circuit is designed at multi resonant frequencies to collect the largest amount of RF ambient power from different RF sources. The developed antenna is matched with the rectifier at four desired frequencies using several rectifier branches to collect the largest of RF power. The proposed rectenna is printed on FR4 substrate with modified ground plane to achieve suitable impedance bandwidth. The proposed antenna consists of elliptical radiating plane with stubs and stepped modified ground plane. The rectenna resonates at quad frequency bands at (GSM 900/1800, WiFi band and WLAN bands) with rectifier power conversion efficiency up to 56.4% at 0 dBm input power using the HSMS-2850 Schottky diode. The efficiency is more enhanced by using SMS-7630-061 Schottky diode which is characterized by a low junction capacitance and a low threshold voltage to achieve higher conversion efficiency up to 71.1% at the same 0 dBm input power for the same resonating frequency band. 展开更多
关键词 MONOPOLE MICROSTRIP Antenna RF Energy HARVESTING MULTI-BAND RECTIFIER RECTENNA Matching Circuit Conversion Efficiency
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基于net CIRCUIT labs的两级交流放大器分析与研究 认领 被引量：1
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作者 陆凯 刘学敏 《电子测试》 2020年第15期56-57,共2页
本文采用net CIRCUIT labs实验云平台对两级放大电路进行分析与研究,分析和测试了放大器的静态工作点、放大倍数以及输入输出阻抗,提供了一种在2020年新冠疫情下开展实际硬件电路云实验的方案。
关键词 net CIRCUIT labs 放大器
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Energy Saving Analysis and Simulation for Home Electricity 认领
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作者 Nader Barsoum Farah Talib 《电力能源(英文)》 2020年第9期35-50,共16页
This paper presents the energy saving method by applying the voltage control technique on a single-phase AC source to a thyristor rectifier and an IGBT inverter with LC filter. Based on the LC filter parameter, the va... This paper presents the energy saving method by applying the voltage control technique on a single-phase AC source to a thyristor rectifier and an IGBT inverter with LC filter. Based on the LC filter parameter, the values of the gain for the controller are obtainable. The proposed controller structure consist</span><span style="font-family:Verdana;">s</span><span style="font-family:Verdana;"> of two loops arranged in a cascaded model. The output of the first loop is the capacitor current. This current is added to the load current in order to obtain the current reference. This reference current value will be compared with the inverter current which produces the error signal to be fed into the second loop in the cascade system. The output of the second loop is the inverter voltage. This voltage is added to the load voltage to produce the voltage reference. This reference is fed to the pulse width modulation generator via the controller and compared with the triangular wave. This energy-saving circuit is designed in blocks using MATLAB Simulink. 展开更多
关键词 Energy-Saving Circuit Rectifier-Inverter LC Filter PI And PR Controllers MATLAB/SIMULINK
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A Review on Electrodynamic Influence of Atmospheric Processes to the Ionosphere 认领
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作者 Valery M. Sorokin Vitaly M. Chmyrev Masashi Hayakawa 《地震研究(英文)》 2020年第2期113-141,共29页
This work is an attempt to critically analyze the existing theoretical models of the impact of earthquake preparation processes on the state of the earth’s atmosphere and ionosphere in the zone of growing seismic act... This work is an attempt to critically analyze the existing theoretical models of the impact of earthquake preparation processes on the state of the earth’s atmosphere and ionosphere in the zone of growing seismic activity, as well as the mechanisms of formation and transfer of disturbances in various media over the earthquake center. The determining factor (criterion) of the analysis is the degree of compliance of the simulation results with experimental data obtained at various phases of earthquake development by direct and remote diagnostic methods using ground and aerospace technologies. The key role is played by the model’s compliance with the results of measuring electric fields and currents in the near-ground atmosphere and ionosphere, small-scale ionospheric inhomogeneities and correlated field-aligned currents and electromagnetic ULF/ELF emissions. A full-fledged model should also explain the origin of such seismic related phenomena as the generation in the troposphere and over-horizon propagation of pulsed VHF radiation, thermal effects and associated IR emissions as well as the modification of plasma distribution in the D, E and F layers of the ionosphere. The use of this criterion in the analysis allowed us to identify a theoretical model that most fully describes the totality of the above-mentioned experimental data within a single physical mechanism. This is an electrodynamic model based on the perturbation of the conductivity current in the global atmosphere—ionosphere electric circuit due to the injection of charged aerosols into the atmosphere during the preparation and development of an earthquake. The present paper describes this model and the formation mechanisms of related phenomena in the atmosphere and ionosphere, which can be considered as short-term precursors to earthquakes. 展开更多
关键词 Earthquake (EQ) Precursors Charged Aerosol Injection Global Electric Circuit IONOSPHERIC IRREGULARITIES ULF/ELF Electromagnetic Emissions Ran-dom Discharges Radiation OVER-THE-HORIZON VHF Propagation
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An Update of the Recent Developments on Amblyopia 认领
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作者 Abdulmajeed Alharbi Hosam Dahaim Al Harbi 《眼科学期刊(英文)》 2020年第3期251-264,共14页
Amblyopia is a neurodevelopmental disorder of the visual cortex arising from abnormal visual experience early in life. Amblyopia is a major cause of impaired vision in infants and young children (prevalence around 3.5... Amblyopia is a neurodevelopmental disorder of the visual cortex arising from abnormal visual experience early in life. Amblyopia is a major cause of impaired vision in infants and young children (prevalence around 3.5%). There are different treatment options for amblyopia based on its severity and age of the patient. Traditional treatments include patching or occlusion of the dominant eye and pharmacological penalisation using Atropine (1%). Recent developments in amblyopia management have found success with the use of binocular exercises and certain modifications of glasses and contact lenses. The critical age up to which amblyopia is treatable or reversible is also being pushed up with more research. With newer advancements in amblyopia therapy, the success rate is also improving with multimodal approach. 展开更多
关键词 AMBLYOPIA Visual Circuit Anisometropic Amblyopia STRABISMUS Visual Dep-rivation Reverse Amblyopia OCCLUSION Binocular Therapy Penalisation Or-thoptics
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Improvements to Temperature, Warburg Impedance, and Voltage Computations for a Design-Based Predictive Model for Lithium-Ion Capacitors 认领
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作者 Davis George Moye Pedro L. Moss +4 位作者 Dhevathi Rajan Rajagopalan Kannan Xujie Chen Omonayo Bolufawi Wanjun Cao Simon Y. Foo 《材料科学与应用期刊(英文)》 2020年第6期347-369,共23页
An earlier study manipulated the Butler-Volmer equation to effectively model a lithium-ion capacitor’s (LIC) energy storage as a function of its constituent components and charge current. However, this model had seve... An earlier study manipulated the Butler-Volmer equation to effectively model a lithium-ion capacitor’s (LIC) energy storage as a function of its constituent components and charge current. However, this model had several shortcomings: computed temperature values were too low, voltage was inaccurate, and the model required Warburg impedance values that were two orders of magnitude higher than experimental results. This study began by analyzing the model’s temperature and voltage computations in order to justify output values. Ultimately, these justifications failed. Therefore, in situ temperature rise was measured during charge cycles. Experimental results indicated that temperature increases minimally during a charge cycle (<1%). At high current densities (≥150 A<span style="white-space:nowrap;">·</span>kg<sup>-1</sup>) temperature increase is negligible. After it was found that LIC temperature change is minimal during a charge cycle, the model accurately computed LIC voltage during the charge cycle and computed Warburg impedance that agreed with values derived from earlier experimental studies, even falling within the measurements’ precision error. 展开更多
关键词 Lithium-Ion Capacitor Randles Equivalent Circuit Model Butler-Volmer Equation
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Improving the Efficiency of Induction Heating in the Air Gap of the Magnetic Circuit 认领
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作者 Vladimir L.Lanin Evgeniy Ratnikau Alexander D.Hatskevich 《电子研究与应用》 2020年第4期1-4,共4页
Improving the efficiency of induction heating of parts in the air gap of the magnetic circuit is associated with the use of surface and edge effects.Through modeling in ANSYS Electromagnetics Suite 19.2 and experiment... Improving the efficiency of induction heating of parts in the air gap of the magnetic circuit is associated with the use of surface and edge effects.Through modeling in ANSYS Electromagnetics Suite 19.2 and experimental studies identified patterns of edge effect in the heated parts.To ensure the uniformity of induction heating of small parts and reduce the soldering time,the electrical switch of soldered parts is used,which with the help of device controller forms a secondary circuit with low electrical resistance and high density of eddy currents. 展开更多
关键词 Induction heating The gap of the magnetic circuit Edge effect Secondary circuit
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Theoretical and Experimental Analysis of Energy in Charging a Capacitor by Step-Wise Potential 认领
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作者 Sami M. Al-Jaber Iyad Saadeddin 《应用数学与应用物理(英文)》 2020年第1期38-52,共15页
In this paper, charging capacitor in RC circuit, to a final voltage, via arbitrary number of steps, is investigated and analyzed both theoretically and experimentally. The obtained results show that the stored energy ... In this paper, charging capacitor in RC circuit, to a final voltage, via arbitrary number of steps, is investigated and analyzed both theoretically and experimentally. The obtained results show that the stored energy in the capacitor is constant independent of N, but the dissipated energy in the resistor and the consumed energy by the power supply decreases as number of steps N increases (adiabatic charging). The limit when the step number goes to infinity is examined and our result shows that the dissipated energy vanishes theoretically. This limit is carried out experimentally by using a ramp potential. 展开更多
关键词 CHARGING CAPACITOR RC Circuit Stored ENERGY Dissipated ENERGY ADIABATIC CHARGING
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Application of FPGA in Process Tomography Systems 认领
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作者 Ling En Hong Yusri Bin Md. Yunos 《工程(英文)(1947-3931)》 2020年第10期790-809,共20页
This paper will provide some insights on the application of Field Programmable Gate Array (FPGA) in process tomography. The focus of this paper will be to investigate the performance of the technology with respect to ... This paper will provide some insights on the application of Field Programmable Gate Array (FPGA) in process tomography. The focus of this paper will be to investigate the performance of the technology with respect to various tomography systems and comparison to other similar technologies including the Application Specific Integrated Circuit (ASIC), Graphics Processing Unit (GPU) and the microcontroller. Fundamentally, the FPGA is primarily used in the Data Acquisition System (DAQ) due to its better performance and better trade-off as compared to competitor technologies. However, the drawback of using FPGA is that it is relatively more expensive. 展开更多
关键词 Data Acquisition System (DAQ) Field Programmable Gate Array (FPGA) Application Specific Integrated Circuit (ASIC) Graphics Processing Unit (GPU) MICROCONTROLLER
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Optimization of reluctance accelerator efficiency by an improved discharging circuit 认领
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作者 Hui-min Deng Yu Wang +1 位作者 Fa-long Lu Zhong-ming Yan 《Defence Technology(防务技术)》 SCIE EI CAS CSCD 2020年第3期662-667,共6页
In this paper,an improved discharging circuit was proposed to quicken the decay of the current in the drive coil in a reluctance accelerator when the armature reaches the center of the coil.The aim of this is to preve... In this paper,an improved discharging circuit was proposed to quicken the decay of the current in the drive coil in a reluctance accelerator when the armature reaches the center of the coil.The aim of this is to prevent the suck-back effect caused by the residual current in drive coil.The method is adding a reverse charging branch with a small capacitor in the traditional pulsed discharging circuit.The results under the traditional circuit and the improved circuit were compared in a simulation.The experiment then verified the simulations and they had good agreement.Simulation and experiment both demonstrated the improved circuit can effectively prevent the suck-back effect and increase the efficiency.At the voltage of 800 V,an efficiency increase of 36.34% was obtained. 展开更多
关键词 Reluctance accelerator Suck-back effect Discharging circuit Current decay Efficiency optimization
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用于心脏科自动监测的体外循环设备研究 认领
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作者 李帆 吴秀 《自动化与仪器仪表》 2020年第5期75-78,共4页
由于传统的体外循环设备故障发生率较高,对患者的治疗造成一定的影响,因此研究一种用于心脏科自动监测的体外循环设备。此次研究主要对体外循环设备模块设计,体外循环设备模块中传感器为体外循环设备提供温度数据采集功能;A/D转换芯片... 由于传统的体外循环设备故障发生率较高,对患者的治疗造成一定的影响,因此研究一种用于心脏科自动监测的体外循环设备。此次研究主要对体外循环设备模块设计,体外循环设备模块中传感器为体外循环设备提供温度数据采集功能;A/D转换芯片主要处理体外循环设备信号;控制器主要为体外循环设备提供监测功能。在此基础上,对体外循环设备功能模块设计,该功能模块通过设计临界值为设备提供自动定标功能,以此完成了用于心脏科自动监测的体外循环设备的设计。实验对比结果表明,此次设计的用于心脏科自动监测的体外循环设备比传统设备故障发生率低,具备实际应用意义。 展开更多
关键词 心脏科 自动监测 体外循环 电路 控制器 治疗
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