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 323

会议视频 4

年份

2024 1

2023 16

2022 30

2021 31

2020 12

2019 23

2018 19

2017 16

2016 14

2015 12

2014 11

2013 19

2012 6

2011 16

2010 20

2009 12

2008 27

2007 17

2006 6

2005 4

展开︾

关键词

个人热管理 2

冲击波 2

卫星 2

数值模拟 2

热分析 2

碳中和 2

Fluent 1

IHNI-1反应堆；热工水力；子通道；安全分析 1

Inconel 718合金 1

KTP 1

PV/T 1

Rosenthal方程 1

SAHP 1

TNT装药爆炸 1

WEM法 1

ZN-1阻尼橡胶材料 1

不可还原性 1

严重事故 1

中国罗布泊 1

展开︾

检索范围：

排序：展示方式：

Technology for the preparation and application of cermet coatings and claddings in thermal power plants

Zongde LIU, Miao LIU, Liping ZHAO

《能源前沿（英文）》 2011年第5卷第3期页码 257-262 doi: 10.1007/s11708-010-0129-3

摘要： This paper introduces the applied background of wear and corrosion-resistant materials in the electricity industry. Next, the paper summarizes the development of preparation technology for cermets and cermet coatings and claddings, finally explaining the application and development of submicron-grain cermet coatings and claddings through reaction synthesis technology.

关键词： cermets cermet coatings/claddings electro-thermal explosion spraying reaction synthesis

HTML PDF 收藏

The Application and the Prospect of Remanufacturing Technologies in the Metallurgical Industry

Jie Xiong,Jian-cheng Fan,Jv Yuan

《工程管理前沿（英文）》 2016年第3卷第2期页码 165-170 doi: 10.15302/J-FEM-2016023

摘要： Metallurgical equipment is subjected to severe working conditions and the components suffer from various types of physical damages such as abrasion, corrosion and crack. Advanced surface engineering technologies and resistant coatings on the damaged surface can improve surface properties, extend service lives, reduce maintenance costs and improve product quality in the metallurgical industry. This paper introduces remanufacturing technologies, including electroplating, overlaying welding, thermal spraying and laser surface cladding and their applications in the metallurgical industry, and analyzes the development tendency and prospect of remanufacturing technologies.

关键词： remanufacturing technology electroplating overlaying welding thermal spraying laser surface cladding

HTML PDF 收藏

Multiobjective trajectory optimization of intelligent electro-hydraulic shovel

《机械工程前沿（英文）》 2022年第17卷第4期 doi: 10.1007/s11465-022-0706-2

摘要： Multiobjective trajectory planning is still face challenges due to certain practical requirements and multiple contradicting objectives optimized simultaneously. In this paper, a multiobjective trajectory optimization approach that sets energy consumption, execution time, and excavation volume as the objective functions is presented for the electro-hydraulic shovel (EHS). The proposed cubic polynomial S-curve is employed to plan the crowd and hoist speed of EHS. Then, a novel hybrid constrained multiobjective evolutionary algorithm based on decomposition is proposed to deal with this constrained multiobjective optimization problem. The normalization of objectives is introduced to minimize the unfavorable effect of orders of magnitude. A novel hybrid constraint handling approach based on -constraint and the adaptive penalty function method is utilized to discover infeasible solution information and improve population diversity. Finally, the entropy weight technique for order preference by similarity to an ideal solution method is used to select the most satisfied solution from the Pareto optimal set. The performance of the proposed strategy is validated and analyzed by a series of simulation and experimental studies. Results show that the proposed approach can provide the high-quality Pareto optimal solutions and outperforms other trajectory optimization schemes investigated in this article.

关键词： trajectory planning electro-hydraulic shovel cubic polynomial S-curve multiobjective optimization entropy weight technique

HTML PDF 收藏

Development of a new wear resistant coating by arc spraying of a steel-based cored wire

Lidong ZHAO, Pia KUTSCHMANN, Binyou FU, Dingyong HE

《机械工程前沿（英文）》 2009年第4卷第1期页码 1-4 doi: 10.1007/s11465-009-0012-2

摘要： In the present study, a cored wire of 304 L stainless steel as sheath material and NiB and WC-12Co as filler materials was designed and deposited to produce a new wear resistant coating containing amorphous phase by arc spraying. The microstructure of the coating was investigated. The porosity and hardness of the coating were determined. The wear performance of the coating was evaluated. The XRD and TEM analyses showed that there are high volume of amorphous phase and very fine crystalline grains in the coating. DTA measurements revealed that the crystallization of the amorphous phase occurred at 579.2°C. Because metallurgical processes for single droplets were non-homogenous during spraying, the lamellae in the coating have different hardness values, which lie between about 700 and 1250 HV . The abrasive wear test showed that the new Fe-based coating was very wear resistant.

关键词： amorphous phase arc spraying microstructure wear cored wire

HTML PDF 收藏

Application of cold spraying for flux-free brazing of aluminium alloy 6060

Kirsten BOBZIN, Lidong ZHAO, Thomas SCHLAEFER, Thomas WARDA,

《机械工程前沿（英文）》 2010年第5卷第3期页码 256-260 doi: 10.1007/s11465-010-0095-9

摘要： In the present study, samples of aluminium alloy 6060 were coated by cold spraying with a powder of brazing alloy Al12Si. The influence of the process gas temperature on particle velocities and coating build-up was investigated. The coated samples were heat-treated in air and under argon atmosphere to investigate the wetting behaviour of the deposited Al12Si and the diffusion processes between Al12Si coatings and substrates. Coated samples were brazed flux-free under argon atmosphere by an induction heating system. The microstructure of the coated, heat-treated, and brazed samples was investigated. The shear strength of the brazed joints was determined. The results show that the brazing alloy Al12Si could be very well deposited on the substrate by cold spraying. The particle velocity increased with increasing process temperature. Correspondingly, the thickness of Al12Si coatings increased with increasing process temperature. The heat treatments showed that a very good metallurgical bond between the Al12Si coatings and the substrate could be realized by the deposition using cold spraying. The coated samples could be well brazed without fluxes. The coating thickness and overlap width influenced the shear strength of the brazed joints. The highest shear strength of brazed joints amounts to 80 MPa.

关键词： aluminium alloy flux-free brazing cold spraying shear strength

HTML PDF 收藏

反爆炸恐怖袭击防排爆技术综述

方向,高振儒,周守强,郭涛

《中国工程科学》 2013年第15卷第5期页码 80-83

摘要：

爆炸袭击是最残酷、最血腥、最难防范的恐怖活动，防排爆是反爆炸恐怖袭击最直接的技术手段，其中涉及搜爆、排爆、防爆等技术装备和方法。近年来，反爆炸恐怖袭击防排爆技术取得了很大进步，但还存在许多技术难题。本文主要分析了爆炸恐怖活动规律、搜排爆装备技术和防护技术现状，研究了爆炸物探测和防排爆的技术途径，针对现有装备技术的局限性提出了研究的方向和思路。

关键词：爆炸恐怖搜爆排爆防爆

HTML PDF 收藏

钢桥梁电弧喷涂纳米封闭复合涂层体系设计

易春龙,沈旺,童育强,刘国彬,于旭东

《中国工程科学》 2010年第12卷第7期页码 53-56

摘要：

为了解决大型桥梁钢箱梁的长效防腐蚀问题，以浙江舟山连岛工程西堠门大桥防腐蚀工程为依托，结合电弧喷涂防腐蚀技术和纳米改性封闭涂层技术，提出了电弧喷涂纳米封闭复合涂层体系的设计思路，对比了电弧喷涂长效防腐传统方案与创新设计方案，对不同腐蚀环境下推荐设计采用不同的电弧喷涂金属涂层材料，对比分析了纳米封闭涂层与普通环氧底层的技术指标，简述了电弧喷涂纳米封闭复合涂层施工各工序的质量要求和检测方法。

关键词：电弧喷涂复合涂层纳米材料钢桥梁防腐蚀

HTML PDF 收藏

Identification of resistant pharmaceuticals in ozonation using QSAR modeling and their fate in electro-peroxone

《环境科学与工程前沿（英文）》 2021年第15卷第5期 doi: 10.1007/s11783-021-1394-6

摘要：

• Effect of converting ozonation to E-peroxone was studied on pharmaceutical removal.

关键词： Ozone Electro-peroxone Wastewater Quantitative structure activity relationship Advanced oxidation processes

HTML PDF 收藏

低渗透油田层内爆炸增产技术研究进展

李德聪,陈力,林英松,丁雁生

《中国工程科学》 2010年第12卷第9期页码 52-57

摘要：

系统介绍了层内爆炸增产技术的技术思路、应用前景以及实现该技术所涉及到的一系列关键性技术问题；详细介绍了近年来针对此项技术所开展的一系列研究工作，报告了取得的一些研究成果，并对今后的主要研究工作做了展望。

关键词：低渗透油田爆炸力学层内爆炸安全性模拟试验力学模型

HTML PDF 收藏

核爆聚变电站──人类未来能源的希望

彭先觉,刘成安,陈银亮,郭勤,尹文华,白云,陈小伟,屈明

《中国工程科学》 2008年第10卷第1期页码 39-46

摘要：

详细介绍了核爆聚变电站的基本概念、组成、发展简史；提出了解决核爆炸实施安全、烧氘型核装置设计、核燃料生产回收等一系列问题的技术途径；对电站的技术可行性进行了分析论证，并比较了各种作为人类未来能源核能方案的前景。

关键词：核爆聚变电站爆洞喷钠烧氘型核装置核燃料循环

HTML PDF 收藏

Effect of Joule heating on electro-osmotic flow in a closed-end micro-channel with isothermal and convective

Liang ZHAO, Linhua LIU,

《能源前沿（英文）》 2009年第3卷第4期页码 381-388 doi: 10.1007/s11708-009-0057-2

摘要： The effect of Joule heating on the steady state electro-osmotic flow in a closed-end micro-channel is studied through numerical simulation with the finite volume method. The velocity field and the temperature field are described by a rigorous mathematical model. Thermophysical properties including viscosity and thermal conductivity are considered to be temperature-dependent. The simulations show that the presence of Joule heating causes an increase in temperature and a decrease in viscosity in the whole micro-channel, which, thereafter, induce a large velocity near the wall and an increase in fluid velocity at the central region in order to maintain a zero flow rate at the cross section of the micro-channel. The effect of Joule heating on the induced pressure gradient is also studied, which is very important for the application of the closed-end micro-channel as a micro-actuator. The results reveal that the induced pressure gradient, taking into consideration Joule heating, is significantly smaller than that without considering Joule heating when the wall temperature of the micro-channel is constant. The induced pressure gradient difference between considering Joule heating and without considering Joule heating is small under the convective boundary condition.

关键词： closed-end micro-channel electrical double layer electro-osmotic flow induced pressure gradient Joule heating

HTML PDF 收藏

Vehicle roll stability control with active roll-resistant electro-hydraulic suspension

Lijun XIAO, Ming WANG, Bangji ZHANG, Zhihua ZHONG

《机械工程前沿（英文）》 2020年第15卷第1期页码 43-54 doi: 10.1007/s11465-019-0547-9

摘要： This study examines roll stability control for vehicles with an active roll-resistant electro-hydraulic suspension (RREHS) subsystem under steering maneuvers. First, we derive a vehicle model with four degrees of freedom and incorporates yaw and roll motions. Second, an optimal linear quadratic regulator controller is obtained in consideration of dynamic vehicle performance. Third, an RREHS subsystem with an electric servo-valve actuator is proposed, and the corresponding dynamic equations are obtained. Fourth, field experiments are conducted to validate the performance of the vehicle model under sine-wave and double-lane-change steering maneuvers. Finally, the effectiveness of the active RREHS is determined by examining vehicle responses under sine-wave and double-lane-change maneuvers. The enhancement in vehicle roll stability through the RREHS subsystem is also verified.

关键词： electro-hydraulic suspension roll stability LQR experiment

HTML PDF 收藏

Effect of polymer structures on electro-optical properties of polymer stabilized liquid crystal films

WANG Shoulian, HE Jie, ZENG Yu, YAN Bin, WANG Yinghan

《化学科学与工程前沿（英文）》 2008年第2卷第3期页码 265-268 doi: 10.1007/s11705-008-0054-8

摘要： The polymer stabilized liquid crystal (PSLC) film is a relatively novel electro-optical material, which is generally obtained by dissolving a small amount of a bifunctional photoreactive monomer in a low molecular mass liquid crystal. In this paper, the PSLC films were prepared with photoreactive biphenyl methacrylate monomers by photopolymerization induced phase separation. The effects of liquid crystal concentration, curing time, monomer structures and alignment layer on the electro-optical properties of PSLC films were investigated. The results show that the transmittance in the OFF state () increased with the liquid crystal concentration, but the driving voltage decreased. was also influenced by the curing time. Furthermore, when polyimide was used as alignment layer, the films prepared from the bifunctional monomer shows a higher T, while those from the single functional monomer exhibited a deformed electro-optical curve due to the unsteady polymer networks.

HTML PDF 收藏

建筑物内爆炸荷载研究综述

高康华,金丰年,王德荣,马士良

《中国工程科学》 2013年第15卷第5期页码 59-64

摘要：

室内爆炸已成为当前建筑物面临爆炸灾害的主要形式之一。本文针对建筑物内化学炸药爆炸和可燃性气体混合物爆燃两种情况，从理论研究、模型试验和数值模拟3个方面总结并评述了当前国内外的研究现状，指出相关研究多以容器及管道内的爆炸试验或数值模拟为主，现有的理论模型对建筑物特点及使用功能考虑较少。

关键词：建筑物内爆炸荷载化学炸药可燃气体混合物爆燃

HTML PDF 收藏

Platinum on nitrogen doped graphene and tungsten carbide supports for ammonia electro-oxidation reaction

《化学科学与工程前沿（英文）》 2022年第16卷第6期页码 930-938 doi: 10.1007/s11705-021-2130-2

摘要： Ammonia electrooxidation reaction involving multistep electron-proton transfer is a significant reaction for fuel cells, hydrogen production and understanding nitrogen cycle. Platinum has been established as the best electrocatalyst for ammonia oxidation in aqueous alkaline media. In this study, Pt/nitrogen-doped graphene (NDG) and Pt/tungsten monocarbide (WC)/NDG are synthesized by a wet chemistry method and their ammonia oxidation activities are compared to commercial Pt/C. Pt/NDG exhibits a specific activity of 0.472 mA∙cm^–2, which is 44% higher than commercial Pt/C, thus establishing NDG as a more effective support than carbon black. Moreover, it is demonstrated that WC as a support also impacts the activity with further 30% increase in comparison to NDG. Surface modification with Ir resulted in the best electrocatalytic activity with Pt-Ir/WC/NDG having almost thrice the current density of commercial Pt/C. This work adds insights regarding the role of NDG and WC as efficient supports along with significant impact of Ir surface modification.

关键词： Ammonia electro-oxidation reaction electrocatalyst supports platinum nitrogen doped graphene tungsten carbide