Search | Engineering

订阅投稿

首页工程期刊工程焦点工程成就工程前沿关于我们 English

资源类型

期刊论文 85

会议视频 3

年份

2023 8

2022 9

2021 3

2020 4

2019 3

2018 5

2017 10

2016 8

2015 6

2014 5

2013 4

2012 1

2011 2

2009 1

2008 4

2007 3

2006 2

2005 1

2004 1

2003 2

展开︾

关键词

人工智能 2

模糊逻辑 2

粗糙集 2

2020全球工程前沿 1

8英寸 1

HEMTs）；栅槽；数字湿法腐蚀；选择性湿法腐蚀 1

HHT 1

QCA）；可逆逻辑；DG门；二进制减法器；量子成本 1

SARS 1

Walsh循环谱 1

“两山”理论 1

下泄水温公式 1

不良地质 1

严格雪崩准则 1

亚像元 1

人工神经网络 1

仿真技术 1

体系；云模型；描述逻辑；需求验证 1

信号处理 1

展开︾

检索范围：

排序：展示方式：

Design of a novel RTD-based three-variable universal logic gate

Mao-qun YAO,Kai YANG,Cong-yuan XU,Ji-zhong SHEN

《信息与电子工程前沿（英文）》 2015年第16卷第8期页码 694-699 doi: 10.1631/FITEE.1500102

摘要： Traditional CMOS technology faces some fundamental physical limitations. Therefore, it has become very important for the integrated circuit industry to continue to develop modern devices and new design methods. The threshold logic gate has attracted much attention because of its powerful logic function. The resonant tunneling diode (RTD) is well suited for implementing the threshold logic gate because of its high-speed switching capability, negative differential resistance (NDR) characteristic, and functional versatility. In this paper, based on the Reed-Muller (RM) algebraic system, a novel method is proposed to convert three-variable non-threshold functions to the XOR of multiple threshold functions, which is simple and has a programmable implementation. With this approach, all three-variable non-threshold functions can be presented by the XOR of two threshold functions, except for two special functions. On this basis, a novel three-variable universal logic gate (ULG3) is proposed, composed of two RTD-based universal threshold logic gates (UTLG) and an RTD-based three-variable XOR gate (XOR3). The ULG3 has a simple structure, and a simple method is presented to implement all three-variable functions using one ULG3. Thus, the proposed ULG3 provides a new efficient universal logic gate to implement RTD-based arbitrary -variable functions.

关键词： Resonant tunneling diode (RTD) Threshold logic gate Reed-Muller expansion Universal logic gate

HTML PDF 收藏

A driving pulse edge modulation technique and its complex programming logic devices implementation

Xiao CHEN,Dong-chang QU,Yong GUO,Guo-zhu CHEN

《信息与电子工程前沿（英文）》 2015年第16卷第12期页码 1088-1098 doi: 10.1631/FITEE.1500111

摘要： With the continual increase in switching speed and rating of power semiconductors, the switching voltage spike becomes a serious problem. This paper describes a new technique of driving pulse edge modulation for insulated gate bipolar transistors (IGBTs). By modulating the density and width of the pulse trains, without regulating the hardware circuit, the slope of the gate driving voltage is controlled to change the switching speed. This technique is used in the driving circuit based on complex programmable logic devices (CPLDs), and the switching voltage spike of IGBTs can be restrained through software, which is easier and more flexible to adjust. Experimental results demonstrate the effectiveness and practicability of the proposed method.

关键词： Driving pulse edge modulation Switching voltage spike Complex programmable logic device (CPLD) Active gate drive

HTML PDF 收藏

基于RTD三变量通用逻辑门的函数综合算法 Article

Mao-qun YAO, Kai YANG, Ji-zhong SHEN, Cong-yuan XU

《信息与电子工程前沿（英文）》 2017年第18卷第10期页码 1654-1664 doi: 10.1631/FITEE.1601730

摘要：首先，提出真值矩阵的概念，并提出一种运用真值矩阵将任意n变量逻辑函数分解成3变量子集函数的非相交分解算法；在上述工作基础上，提出用基于RTD通用阈值逻辑门（universal threshold logic

关键词：共振隧穿器件（RTD）；非相交分解算法；通用逻辑门；真值矩阵；函数综合算法

HTML PDF 收藏

基于量子元胞自动机的可逆二进制减法器设计 Article

Jadav Chandra DAS, Debashis DE

《信息与电子工程前沿（英文）》 2017年第18卷第9期页码 1416-1429 doi: 10.1631/FITEE.1600999

摘要：在纳米技术领域，量子元胞自动机（quantum dot-cellular automata, QCA）可作为传统互补金属氧化物半导体（complementary metal oxide semiconductor, CMOS）电路的替代方案，具有可观的发展前景。QCA设备密度高，运行速度快，且功耗极低。在QCA中，可逆逻辑有着广泛应用。研究者已开发多个基于QCA的可逆逻辑电路，但基于QCA的可逆二进制减法器研究却不多见。QCA低功耗和高电流密度的特点，使其可用于设计纳米尺度节能逻辑电路。然而，其对大量逻辑门的需求和不利的无用输出，可能限制基于QCA逻辑电路的功能。我们利用QCA设计并实现了一个DG门，实现了DG门的普遍特征。利用该DG门的QCA部分，可以获得新的可逆二进制减法器。相比现有可逆减法器，我们设计的减法器量子成本低，无用输出少。电路设计与模拟基于QCA Designer-2.0.3软件。

关键词：量子元胞自动机（quantum dot-cellular automata QCA）；可逆逻辑；DG门；二进制减法器；量子成本

HTML PDF 收藏

Utilization threshold of surface water and groundwater based on the system optimization of crop planting

Qiang FU,Jiahong LI,Tianxiao LI,Dong LIU,Song CUI

《农业科学与工程前沿（英文）》 2016年第3卷第3期页码 231-240 doi: 10.15302/J-FASE-2016101

摘要： Based on the diversity of the agricultural system, this research calculates the planting structures of rice, maize and soybean considering the optimal economic-social-ecological aspects. Then, based on the uncertainty and randomness of the water resources system, the interval two-stage stochastic programming method, which introduces the uncertainty of the interval number, is used to calculate the groundwater exploitation and the use efficiency of surface water. The method considers the minimum cost of water as the objective of the uncertainty model for surface water and groundwater joint scheduling optimization for different planting structures. Finally, by calculating harmonious entropy, the optimal exploitation utilization interval of surface water and groundwater is determined for optimal cultivation in the Sanjiang Plain. The optimal matching of the planting structure under the economic system is suitable when the mining ratio of the surface is in 44.13%–45.45% and the exploitation utilization of groundwater is in 54.82%–66.86%, the optimal planting structure under the social system is suitable when surface water mining ratio is in 47.84%–48.04% and the groundwater exploitation threshold is in 67.07%–72.00%. This article optimizes the economic-social-ecological-water system, which is important for the development of a water- and food-conserving society and providing a more accurate management environment.

关键词： economic-social-ecological uncertainty harmonious entropy surface water and groundwater utilization threshold

HTML PDF 收藏

Approaching the commercial threshold of solar water splitting toward hydrogen by III-nitrides nanowires

《能源前沿（英文）》 doi: 10.1007/s11708-023-0870-z

摘要： Approaching the commercial threshold of solar water splitting toward hydrogen by III-nitrides nanowires

关键词： threshold solar water splitting hydrogen III

HTML PDF 收藏

Predication of discharge coefficient of cylindrical weir-gate using adaptive neuro fuzzy inference systems

Abbas PARSAIE,Amir Hamzeh HAGHIABI,Mojtaba SANEIE,Hasan TORABI

《结构与土木工程前沿（英文）》 2017年第11卷第1期页码 111-122 doi: 10.1007/s11709-016-0354-x

摘要： Settlement of sediments behind weirs and accumulation of materials floating on water behind gates decreases the performance of these structures. Weir-gate is a combination of weir and gate structures which solves them Infirmities. Proposing a circular shape for crest of weirs to improve their performance, investigators have proposed cylindrical shape to improve the performance of weir-gate structure and call it cylindrical weir-gate. In this research, discharge coefficient of weir-gate was predicated using adaptive neuro fuzzy inference systems (ANFIS). To compare the performance of ANFIS with other types of soft computing techniques, multilayer perceptron neural network (MLP) was prepared as well. Results of MLP and ANFIS showed that both models have high ability for modeling and predicting discharge coefficient; however, ANFIS is a bit more accurate. The sensitivity analysis of MLP and ANFIS showed that Froude number of flow at upstream of weir and ratio of gate opening height to the diameter of weir are the most effective parameters on discharge coefficient.

关键词： weir-gate soft computing crest geometry circular crest weir cylindrical shape

HTML PDF 收藏

基于量子点元胞自动机的超高效可逆块的纳米设计 Research Article

Seyed Sajad AHMADPOUR1, Nima Jafari NAVIMIPOUR1, Mohammad MOSLEH2, Senay YALCIN3

《信息与电子工程前沿（英文）》 2023年第24卷第3期页码 447-456 doi: 10.1631/FITEE.2200095

摘要：首先提出一个可逆门ANG (Ahmadpour Navimipour Gate)，然后在QCA技术中实现非抗性ANG和可逆容错ANG两种结构。

关键词：纳米技术；可逆逻辑；能量耗散；量子点元胞自动机（QCA）；可逆门；米勒算法

HTML PDF 收藏

Application of fuzzy logic control algorithm as stator power controller of a grid-connected doubly-fed

Ridha CHEIKH, Arezki MENACER, Said DRID, Mourad TIAR

《能源前沿（英文）》 2013年第7卷第1期页码 49-55 doi: 10.1007/s11708-012-0217-7

摘要： This paper discusses the power outputs control of a grid-connected doubly-fed induction generator (DFIG) for a wind power generation systems. The DFIG structure control has a six diode rectifier and a PWM IGBT converter in order to control the power outputs of the DFIG driven by wind turbine. So, to supply commercially the electrical power to the grid without any problems related to power quality, the active and reactive powers ( , ) at the stator side of the DFIG are strictly controlled at a required level, which, in this paper, is realized with an optimized fuzzy logic controller based on the grid flux oriented control, which gives an optimal operation of the DFIG in sub-synchronous region, and the control of the stator power flow with the possibility of keeping stator power factor at a unity.

关键词： doubly-fed induction generator (DFIG) vector control fuzzy logic controller optimization power factor unity active and reactive power

HTML PDF 收藏

Fracture model for the prediction of the electrical percolation threshold in CNTs/Polymer composites

Yang SHEN, Pengfei HE, Xiaoying ZHUANG

《结构与土木工程前沿（英文）》 2018年第12卷第1期页码 125-136 doi: 10.1007/s11709-017-0396-8

摘要： In this paper, we propose a 3D stochastic model to predict the percolation threshold and the effective electric conductivity of CNTs/Polymer composites. We consider the tunneling effect in our model so that the unrealistic interpenetration can be avoided in the identification of the conductive paths between the CNTs inside the polymer. The results are shown to be in good agreement with reported experimental data.

关键词： electrical percolation CNTs/Polymer composites fracture model electric conductivity tunnelling effects

HTML PDF 收藏

An interval type-2 fuzzy logic controller for TCSC to improve the damping of power system oscillations

Manoj Kumar PANDA, Gopinath PILLAI, Vijay KUMAR

《能源前沿（英文）》 2013年第7卷第3期页码 307-316 doi: 10.1007/s11708-013-0269-3

摘要： In this paper an interval type-2 fuzzy logic controller (IT2FLC) was proposed for thyristor controlled series capacitor (TCSC) to improve power system damping. For controller design, memberships of system variables were represented using interval type-2 fuzzy sets. The three-dimensional membership function of type-2 fuzzy sets provided additional degree of freedom that made it possible to directly model and handle uncertainties. Simulations conducted on a single machine infinite bus (SMIB) power system showed that the proposed controller was more effective than particle swarm optimization (PSO) tuned and type-1 fuzzy logic (T1FL) based damping controllers. Robust performance of the proposed controller was also validated at different operating conditions, various disturbances and parameter variation of the transmission line parameters.

关键词： power system oscillations thyristor controlled series capacitor (TCSC) type-2 fuzzy logic system interval type-2 fuzzy logic controller (IT2FLC)

HTML PDF 收藏

Doubly-fed induction generator drive based WECS using fuzzy logic controller

Abdelhak DIDA,Djilani BEN ATTOUS

《能源前沿（英文）》 2015年第9卷第3期页码 272-281 doi: 10.1007/s11708-015-0363-9

摘要： The purpose of this paper is to improve the control performance of the variable speed, constant frequency doubly-fed induction generator in the wind turbine generation system by using fuzzy logic controllers. The control of the rotor-side converter is realized by stator flux oriented control, whereas the control of the grid-side converter is performed by a control strategy based on grid voltage orientation to maintain the DC-link voltage stability. An intelligent fuzzy inference system is proposed as an alternative of the conventional proportional and integral (PI) controller to overcome any disturbance, such as fast wind speed variation, short grid voltage fault, parameter variations and so on. Five fuzzy logic controllers are used in the rotor side converter (RSC) for maximum power point tracking (MPPT) algorithm, active and reactive power control loops, and another two fuzzy logic controllers for direct and quadratic rotor currents components control loops. The performances have been tested on 1.5 MW doubly-fed induction generator (DFIG) in a Matlab/Simulink software environment.

关键词： fuzzy logic wind turbine vector control doubly-fed induction generator (DFIG)

HTML PDF 收藏

8英寸绝缘栅双极型晶体管 (IGBT) 关键技术研究 Article

刘国友,丁荣军,罗海辉

《工程（英文）》 2015年第1卷第3期页码 361-366 doi: 10.15302/J-ENG-2015043

摘要：

基于8英寸绝缘栅双极型晶体管 (IGBT) 生产线的建设，重点解决了8英寸IGBT先进工艺技术、第四代高压双扩散金属氧化物半导体 (DMOS+) IGBT技术和第五代沟槽栅IGBT技术等关键技术问题，实现了高压IGBT芯片制造从6英寸到8英寸的技术突破，自主开发的1600 A/1.7 kV与1500 A/3.3 kV IGBT模块已经被成功制造并通过考核，现已应用于轨道交通牵引系统。

关键词：绝缘栅双极型晶体管 (IGBT) 高功率密度沟槽栅 8英寸轨道交通

HTML PDF 收藏

Special issue on “Molecular Sensors and Molecular Logic Gates”

Luling Wu , Tony D. James

《化学科学与工程前沿（英文）》 2022年第16卷第1期页码 1-3 doi: 10.1007/s11705-021-2134-y

HTML PDF 收藏

Blind identification of threshold auto-regressive model for machine fault diagnosis

LI Zhinong, HE Yongyong, CHU Fulei, WU Zhaotong

《机械工程前沿（英文）》 2007年第2卷第1期页码 46-49 doi: 10.1007/s11465-007-0007-9

摘要： A blind identification method was developed for the threshold auto-regressive (TAR) model. The method had good identification accuracy and rapid convergence, especially for higher order systems. The proposed method was then combined with the hidden Markov model (HMM) to determine the auto-regressive (AR) coefficients for each interval used for feature extraction, with the HMM as a classifier. The fault diagnoses during the speed-up and speed-down processes for rotating machinery have been successfully completed. The result of the experiment shows that the proposed method is practical and effective.

关键词： speed-up classifier practical extraction experiment