Electronics Science Technology and Application (E-Journal)
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Determination of Optimum Zn content in Cd1-xZnxS Nanoparticles
No full textCdZnS quantum dots (QDs) QDs containing concentrations of 0.25, 0.5, 1, 3 and 5% Zn were synthesized at room temperature by chemical precipitation method and then incident photons to current efficiency (IPCE) measurements were performed to determine optimum Zn concentration in CdZnS QDs. Moreover, Zn2SnO4, a ternary compound semiconductor, was used instead of TiO2 as counter electrode for the first time. As a last part of the study, the structural and optical properties of CdZnS QDs containing optimum Zn content were investigated, respectively. Consequently, it appears that CdZnS QDs have a higher efficiency than CdS and that Zn doping plays an important role in this increase
Enhancing photoresponse by synergy of electric double layer gate and illumination in single CuTCNQ NW field effect transistors
Get PDFWe report that photoresponse of a single metal-organic charge transfer complex Cu:TCNQ nanowire (NW) can be enhanced simultaneously by illumination as well as applying a gate bias in an Electric Double Layer Field Effect Transistor (EDL-FET) configuration fabricated on Cu:TCNQ as a channel.It is observed that applying a bias using an EDL gate to a n-channel Cu:TCNQ single NW FET, one can enhance the photoresponse of the Cu:TCNQ substantially over that which arise from the photoconductive response alone. Electron-hole pairs that generate in the NW under illuminated of wavelength 400nm gives rise photo current. Also, electric double layer induce negative charges in the NW channel which effectively increases the carrier concentration, contributing to better response in conduction. The effect reported here has a generic nature that gives rise to a class of gated photodetectors of different photoresponsive materials
Application and Realization of Plc Technology in Mechanical Electrical Control Device
Get PDFNowadays, both automation and computer technology have been greatly developed, and PLC technology is also widely used in the field of mechanical and electrical control because of the development of these technologies. PLC technology plays an important role in the digital mechanical production. It can not only improve the mechanical and electrical control devices, but also achieve the purpose of mechanical and electrical automation. As a mainstream technology, PLC has high technical level requirements for related configuration and operation. Therefore, the application of PLC technology has a very high implementation value. Researchers are constantly exploring and deepening PLC technology so that they can be efficiently applied to mechanical electrical control devices. Therefore, this paper briefly analyzes and discusses the application and implementation of PLC technology in mechanical and electrical control devices
On the Reconstruction Capability of the Linear Sampling Method
Get PDFLinear Sampling Method (LSM), although a simple and fast qualitative method, encounters some limitations and restrictions when it comes to measurement set-up and realistic implementation. Addressing some difficulties arising from somewhat complicated measurement structures used to gather raw data for the reconstruction algorithm, this communication tries to show the effect of mutual coupling between antennas utilized in the measurement chamber. Another tangible effect of the antenna arrangement, covered here through reconstructing a reference scenario of Fresnel Institute dataset, has to do with the aspect-limited nature of scan lines. Reconstructions based on both simulated and measured data are reported
The Application and Analysis of Mechatronics System in Mechanical Engineering
Get PDFIn recent years, China's economic level has been steadily improved, and the development of various industries has greatly improved the quality of life of people, and the use of machinery has contributed greatly to this process. In view of the application of mechatronics in mechanical engineering, this article makes a simple discussion on three aspects of its application field, development trend and coping strategy. And to help the development of mechanical engineering, to make the contribution of our country's economic development
Efficiency Estimation of Infrared Heating Systems for Mounting Electronics Modules
Get PDFThe efficiency of shortly - and middle-wave infrared (IR) sources of heat applied to mounting and demounting of electronic modules is sized up. Thermal fields models analysis shows IR lamps irregularity of heating of the PCB and packages of electronic components. For ceramic IR radiator irregularity of heating of the PCB makes 8-13°С, the temperature SMD components packages differs from plate temperature on 5-20°С. Application middle-wave ceramic IR sources allows to attain higher uniformity of heat in a working area and to ensure optimal temperature profile at mounting and demounting of surface-mounted electronic components.
Thinking on the technology of Electronic Engineering Automation
Get PDFThe main characteristic of computer automation technology is its computer function. Then it is combined with computer aided design, computer aided manufacturing, computer aided manufacturing and so on, so as to form today's electronic computer. It combines computer information technology, circuit theory, information analysis and so on, so as to enhance the performance and efficiency of the computer. This article mainly analyzes the present situation of electronic engineering automation technology, discusses the importance of electronic engineering automation technology, and its application field and the future development prospect, so as to initiate some related thinking and put forward some personal suggestions. For your reference
Analysis on Safety Measures of Substation Maintenance
Get PDFAs an important node in the power grid, substation plays a very important role in the whole power grid. The equipment operation of the substation is carried out in order to timely and effectively detect the operation status of the equipment, find the latent fault of the equipment, and the maintenance of the substation is necessary for safe operation. However, there are some safety problems in the operation of the substation, which need to analyze the status quo of its safe operation and formulate the corresponding improvement measures. Based on this, this article on the substation maintenance work safety measures for a brief analysis, hoping to provide for future reference
Determination of heavy metals in soil by inductively coupled plasma mass spectrometry (ICP-MS) with internal standard method
Get PDFSoil ,the carrier of agricultural production and important part of the ecological environment, is heavily contaminated with hazards heavy metals. Therefore, it is oblige to research analytical techniques that could efficiently determine the total content of heavy metals in soil. The determination of heavy metals in soil was disturbed by matrix elements or spectral interferences . In this study , this problem was solved by internal standard method . GBW07402、GBW07448、GBW07423、GBW07428、GBW074079 soil sample were chosen to be the Certified Reference Materials, soils was prepared by microwave digestion with mixed acid following analyzed for determination the content（Cr,Cu, Pb,Ba,Ni,Mn ） by Inductively coupled plasma mass spectrometric in 50ug/L internal standard concentration, the method was validated by compared with certified values 、method contrast(standard addition method versus internal standard method scan the same prepared solution ) and recovery check. The results of internal standard method are in excellent agreement with the indicative values and the date obtained from standard addition method, respectively. Recoveries were adequate being in the acceptable range of 90-99% and RSD of <6.7 % for all the elements at three level of 5,20 and 50mg/kg with quantified by standard addition method and internal standard method .Finally, The graphy of quality control(n=100)were obtained to guide internal quality control in laborator
Group Consensus of Heterogenous Continuous-time Multi-agent Systems
Get PDFThis paper considers the group consensus problem for continuous-time linear heterogeneous multi-agent systems with undirected and directed fixed topology. In order to obtain group consensus, we use two partition coefficients to divide all second-order agents and all first-order agents as the two groups, a novel protocol is designed. By constructing the Lyapunov function, a sufficient condition for group consensus under undirected topology are proved. Based on a system transformation method, the group consensus for heterogeneous multi-agent systems is transformed into a group consensus for homogeneous multi-agent systems. We also find the convergence points of the two groups, it has great significance. Finally, numerical examples are provided to demonstrate the effectiveness of the theoretical results