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 154

会议视频 2

年份

2023 19

2022 22

2021 17

2020 6

2019 9

2018 4

2017 16

2016 11

2015 4

2014 1

2013 1

2012 2

2011 3

2010 4

2009 1

2008 8

2007 8

2006 2

2005 6

2004 5

展开︾

关键词

仿真 2

多目标优化 2

碳中和 2

计算机模拟 2

1)模型 1

2016年熊本地震 1

5G 1

ALOS-2 PALSAR-2 1

ANSYS 1

Arrhenius模型 1

BP算法 1

CGCS2000维持 1

CMA 1

CO₂利用 1

CO₂封存 1

CPR1000 1

CSCW 1

GM(1 1

Hilbert变换 1

展开︾

检索范围：

排序：展示方式：

带多局部约束的改进push-sum框架分布式优化及其在智能电网中的应用

徐谦,俞楚天,袁翔,韦梦立,刘洪喆

《信息与电子工程前沿（英文）》 2023年第24卷第9期页码 1253-1260 doi: 10.1631/FITEE.2200596

摘要：为此，在改进的push-sum框架下，本文设计了新的分布式优化算法，并在强连通图的假设下给出了其严格的收敛分析。最后，仿真结果证明了所提算法的良好性能。

关键词：分布式优化非一致约束改进push-sum框架

HTML 收藏

An improved low-complexity sum-product decoding algorithm for low-density parity-check codes

Michaelraj Kingston ROBERTS,Ramesh JAYABALAN

《信息与电子工程前沿（英文）》 2015年第16卷第6期页码 511-518 doi: 10.1631/FITEE.1400269

摘要： In this paper, an improved low-complexity sum-product decoding algorithm is presented for low-density parity-check (LDPC) codes. In the proposed algorithm, reduction in computational complexity is achieved by utilizing fast Fourier transform (FFT) with time shift in the check node process. The improvement in the decoding performance is achieved by utilizing an optimized integer constant in the variable node process. Simulation results show that the proposed algorithm achieves an overall coding gain improvement ranging from 0.04 to 0.46 dB. Moreover, when compared with the sum-product algorithm (SPA), the proposed decoding algorithm can achieve a reduction of 42%-67% of the total number of arithmetic operations required for the decoding process.

关键词： Computational complexity Coding gain Fast Fourier transform (FFT) Low-density parity-check (LDPC) codes Sum-product algorithm (SPA)

HTML PDF 收藏

Experimental investigation of fatigue behavior of spur gear in altered tooth-sum gearing

H. K. SACHIDANANDA, Joseph GONSALVIS, H. R. PRAKASH

《机械工程前沿（英文）》 2012年第7卷第3期页码 268-278 doi: 10.1007/s11465-012-0331-6

摘要：

This paper deals with the contact stress, power loss, and pitting of spur gear tooth in altered tooth-sum gearing for a tooth-sum of 100 teeth when altered by±4% tooth-sum. Analytical and experimental methods were performed to investigate and compare the altered tooth-sum gearing against the standard tooth-sum gearing. The experiments were performed using a power recirculating type test rig. The tooth loads for the experimental investigations were determined considering the surface durability of gears. A clear picture of the surface damage was obtained using a scanning electron microphotograph. The negative alteration in the tooth-sum performed better than the positive alteration in a tooth-sum operating between specified center distances.

关键词： spur gear power recirculating test rig altered tooth-sum gearing scanning electron microscopy (SEM)

HTML PDF 收藏

一种基于参数扰动的芯片成品率双目标优化框架

Xin LI,Jin SUN,Fu XIAO,Jiang-shan TIAN

《信息与电子工程前沿（英文）》 2016年第17卷第2期页码 160-172 doi: 10.1631/FITEE.1500168

摘要：我们提出了一种基于Chebyshev仿射算术（CAA）和自适应加权和（AWS）方法的新型双目标优化框架，在该框架中将功率和时序收益两者均设置为目标函数。同时优化两个目标以保持它们之间的相关性。在ISCAS基准电路上的实验结果表明，该双目标框架能够在功率和时序产量之间提供足够的权衡信息。

关键词：参数变化，参数收益率，多目标优化，切比雪夫仿射，自适应加权和，

HTML PDF 收藏

全球计时器暂停闰秒计时

Chris Palmer

《工程（英文）》 2023年第27卷第8期页码 6-7 doi: 10.1016/j.eng.2023.06.003

HTML PDF 收藏

先进天线赋能无线互联

陆贵文, 段宝岩

《工程（英文）》 2022年第11卷第4期页码 1-2 doi: 10.1016/j.eng.2022.03.003

HTML PDF 收藏

Synthesis and characterization of 2,5-bis[4-(2-arylvinyl)phenyl]-1,3,4-oxadiazoles with two-photon fluorescence properties

ZHU Xiaoqin, QIAN Ying, LU Zhifeng

《化学科学与工程前沿（英文）》 2007年第1卷第4期页码 381-384 doi: 10.1007/s11705-007-0069-6

摘要： Four novel 2,5-bis[4-(2-arylvinyl)phenyl]-1,3,4-oxadiazoles that exhibit strong two-photon absorption and enhanced two-photon excited fluorescence were designed and synthesized based on push-core-pull-core-push molecules built from embedding electron-transporting 1,3,4-oxadiazole in aromatic conjugated system through Wittig-Horner reaction. Their chemical structures were determined to show trans-vinylene character according to infrared (IR) and H nuclear magnetic resonance (NMR) spectra. A very effective energy transfer from the excited units to the ?-conjugated bridging unit can enhance the two-photon absorption and two-photon fluorescence.

关键词： 2-arylvinyl trans-vinylene character effective fluorescence push-core-pull-core-push

HTML PDF 收藏

基于适用概率匹配与多维情境驱动的设计知识推送技术 None

Shu-you ZHANG, Ye GU, Xiao-jian LIU, Jian-rong TAN

《信息与电子工程前沿（英文）》 2018年第19卷第2期页码 235-245 doi: 10.1631/FITEE.1700763

摘要：为了提高产品智能设计过程中设计知识的使用效率和质量，有必要向设计人员主动推送设计知识。知识推送主要包括知识匹配和匹配结果的合理推送两个方面。针对现有知识匹配通常缺乏智能性和匹配结果推送缺少个性化的问题，提出基于适用概率匹配和多维情境驱动的设计知识推送技术。构建包括设计知识表示向量、设计案例特征向量和映射布尔矩阵等的训练样本集，通过贝叶斯理论计算设计知识适用与不适用于设计内容的概率，即二者之间的匹配度，得到推送知识集。构建等级化设计内容模型对推送知识集进行过滤，通过设计知识、设计上下文、设计内容和设计人员等多维情境驱动，实现个性化的设计知识推送。在数控机床智能设计平台中的知识推送应用，证明了该技术的可行性和正确性。

关键词：产品设计；知识推送；适用概率匹配；多维情境；个性化

HTML PDF 收藏

Push recovery for the standing under-actuated bipedal robot using the hip strategy

Chao LI,Rong XIONG,Qiu-guo ZHU,Jun WU,Ya-liang WANG,Yi-ming HUANG

《信息与电子工程前沿（英文）》 2015年第16卷第7期页码 579-593 doi: 10.1631/FITEE.14a0230

摘要： This paper presents a control algorithm for push recovery, which particularly focuses on the hip strategy when an external disturbance is applied on the body of a standing under-actuated biped. By analyzing a simplified dynamic model of a bipedal robot in the stance phase, it is found that horizontal stability can be maintained with a suitably controlled torque applied at the hip. However, errors in the angle or angular velocity of body posture may appear, due to the dynamic coupling of the translational and rotational motions. To solve this problem, different hip strategies are discussed for two cases when (1) external disturbance is applied on the center of mass (CoM) and (2) external torque is acting around the CoM, and a universal hip strategy is derived for most disturbances. Moreover, three torque primitives for the hip, depending on the type of disturbance, are designed to achieve translational and rotational balance recovery simultaneously. Compared with closed-loop control, the advantage of the open-loop methods of torque primitives lies in rapid response and reasonable performance. Finally, simulation studies of the push recovery of a bipedal robot are presented to demonstrate the effectiveness of the proposed methods.

关键词： Push recovery Balance control Bipedal robot Hip strategy

HTML PDF 收藏

一种BP神经网络的改进方法及其应用

李宏刚,吕辉,李刚

《中国工程科学》 2005年第7卷第5期页码 63-65

摘要：仿真结果表明，在导弹指令跟踪中，改进算法比原来算法优越得多。

关键词：神经网络改进算法仿真

HTML PDF 收藏

一种易用的实体识别消歧系统评测框架 Article

辉陈,宝刚魏,一鸣李,Yong-huai LIU,文浩朱

《信息与电子工程前沿（英文）》 2017年第18卷第2期页码 195-205 doi: 10.1631/FITEE.1500473

摘要：因此很有必要设计一个评测框架对各个系统进行统一评测。本文提出一个实体识别消歧系统的统一评测框架，用于公平地比较各个实体识别消歧系统的效果。该框架代码开源，可以采用新的系统、数据集、评测机制扩展。通过该框架评测实体系统，可以分析得到系统各个模块的优劣之处。本文分析对比了几个公开的实体识别消歧系统，并总结出了一些有用的结论。

关键词：实体识别消歧；评测框架；信息抽取

HTML PDF 收藏

一种应用于目标检测和跟踪的和差波束扫描的双周期漏波天线阵列 Research Article

黄棉烽1,2,刘菊华1,2

《信息与电子工程前沿（英文）》 2023年第24卷第4期页码 567-581 doi: 10.1631/FITEE.2200473

摘要：本文提出一种两个基片集成波导（SIW）周期性漏波天线（LWA）组成的天线阵列，该阵列具有和差波束扫描功能，可应用于目标检测和跟踪。阵列由两个具有不同周期的漏波天线组成，其中每个漏波天线通过n=-1空间谐波辐射产生窄波束。这两个漏波天线因为具有不同的周期所以可产生两个不同方向的波束。当对阵列进行同相馈电时，这两个波束将组合成和波束；当对阵列进行反相馈电时，两个波束则组合成差波束。我们设计了集成180°混合网络的阵列，并对其加工与实测。实测结果显示阵列的和波束增益最高可达15.9 dBi，和波束扫描范围为-33.4°至20.8°。在扫描范围内，差波束中的零点方向与和波束的辐射方向角一致，最低的零点深度为-40.8 dB。实测结果表明该天线阵列具有优异的性能，能够为目标检测和跟踪应用提供一种低复杂度和低成本的替代解决方案。

关键词：天线；漏波天线（LWA）；基片集成波导（SIW）；和差波束；目标检测和跟踪

HTML PDF 收藏

基于时间分数阶导数的改进ROF去噪模型 Research Articles

廖星冉

《信息与电子工程前沿（英文）》 2020年第21卷第6期页码 809-962 doi: 10.1631/FITEE.2000067

摘要：数值试验结果表明，改进的模型比现有模型具有更强去噪和纹理保持能力。

关键词：改进ROF去噪模型；时间分数阶导数；Caputo导数；图像去噪

HTML PDF 收藏

Pathogenesis of pandemic H1N1 2009 influenza virus infection and the implication on management

Kelvin Kai-Wang TO FRCPath, Iris Wai-Sum LI FRCP, Ivan Fan-Ngai HUNG FRCP, Vincent Chi-Chung CHENG FRCPath

《医学前沿（英文）》 2010年第4卷第2期页码 147-156 doi: 10.1007/s11684-010-0030-9

摘要： The pandemic H1N1 2009 influenza virus has caused the first influenza pandemic of the 21st century, leading to disproportionate fatalities in the low-risk population despite the generally mild nature of the illness. Advances in sci

关键词： influenza A virus H1N1 subtype pandemic pathogenesis virulence factors immunity management antiviral