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 171

会议信息 4

会议视频 1

年份

2023 5

2022 13

2021 22

2020 19

2019 13

2018 17

2017 17

2016 12

2015 14

2014 2

2013 6

2012 2

2011 3

2010 8

2009 5

2008 6

2007 5

2006 1

2005 3

2002 1

展开︾

关键词

2020 2

强震发生断层 2

11 1

19 1

2019 1

CCS 1

CCUS 1

CO₂-ECBM 1

COVID-19 1

Chord图 1

EI2E 1

E通 1

GPRS；嵌入式Internet；S3C2410；SIM100-E 1

IC3E 1

IC4E 1

IEE 1

IEEE 802-16e 1

Klee图 1

MnAl 1

展开︾

检索范围：

排序：展示方式：

E-commerce businessmodel mining and prediction

Zhou-zhou HE,Zhong-fei ZHANG,Chun-ming CHEN,Zheng-gang WANG

《信息与电子工程前沿（英文）》 2015年第16卷第9期页码 707-719 doi: 10.1631/FITEE.1500148

摘要： We study the problem of business model mining and prediction in the e-commerce context. Unlike most existing approaches where this is typically formulated as a regression problem or a time-series prediction problem, we take a different formulation to this problem by noting that these existing approaches fail to consider the potential relationships both among the consumers (consumer influence) and among the shops (competitions or collaborations). Taking this observation into consideration, we propose a new method for e-commerce business model mining and prediction, called EBMM, which combines regression with community analysis. The challenge is that the links in the network are typically not directly observed, which is addressed by applying information diffusion theory through the consumer-shop network. Extensive evaluations using Alibaba Group e-commerce data demonstrate the promise and superiority of EBMM to the state-of-the-art methods in terms of business model mining and prediction.

关键词： E-commerce Business model prediction Consumer influence Social network Sales prediction

HTML PDF 收藏

针对异构隐式反馈的置信度估计方法 Article

Jing WANG, Lan-fen LIN, Heng ZHANG, Jia-qi TU, Peng-hua YU

《信息与电子工程前沿（英文）》 2017年第18卷第11期页码 1817-1827 doi: 10.1631/FITEE.1601468

摘要：隐式反馈是指用户通过行为间接表达用户的意见。由于其在现实世界中的易得性和丰富性，越来越受到推荐系统领域的关注。使用隐式反馈的常见做法是把隐式反馈当做正面或者负面的用户偏好，并附带不同的置信度。这类方法大多认为，与隐式反馈相关的数值（例如观看的时间）反映了置信度的大小，并且数值越大代表置信度越大。这种假设只适合只有一种隐式反馈的场景。然而在现实世界中，经常同时存在多种隐式反馈，称为异构隐式反馈。现有方法无法有效地从异构隐式反馈中推测出置信度。本文提出了一种新颖的利用异构隐式反馈预测置信度的方法，把预测的置信度应用到“基于点的”和“基于对的”矩阵分解模型中，并提出了一种更通用的方法来为“基于对的”方法选择有效的训练样本。在天猫提供的真实电商数据集上的实验表明，本文方法在多个指标上的效果均要优于现有的方法。

关键词：推荐系统；异构隐式反馈；置信度；协同过滤；电商

HTML PDF 收藏

韩圣龙：数字乡村建设中的电商扶贫政策研究（2020年11月6日）

2022年10月14日

关键词：信息技术

Sustainability of metal recovery from E-waste

Biswajit Debnath, Ranjana Chowdhury, Sadhan Kumar Ghosh

《环境科学与工程前沿（英文）》 2018年第12卷第6期 doi: 10.1007/s11783-018-1044-9

摘要：

Metal recovery techniques from electronic waste reported in literature.

Metal recovery processes followed in Industries from electronic waste.

Sustainability analysis of metal recovery processes from electronic waste.

关键词： E-waste Metal recovery Metal Recovery from E-waste (MREW) Sustainability

HTML PDF 收藏

自动售货机研究现状及展望

余世明,晁岳磊,缪仁将

《中国工程科学》 2008年第10卷第7期页码 51-56

摘要：

概括介绍了自动售货机的市场发展现状，详细介绍了国内外自动售货机的技术研究现状，并简述了自动售货机在其他相关领域的应用。从整个社会的角度，论述了自动售货机对生活、环境的影响。得出自动售货机的未来发展趋势是将其纳入到一个更广阔、更便利的移动商务网平台中，同时能合理利用能源，并带来较少的负面社会影响。

关键词：自动售货机移动商务节能社会影响

HTML PDF 收藏

risks of heavy metals, polybrominated diphenyl ethers, and polychlorinated dibenzo-dioxins/furans at e-waste

《环境科学与工程前沿（英文）》 2023年第17卷第7期 doi: 10.1007/s11783-023-1679-z

摘要：

● Heavy metals and organic toxins may persist in legacy sites for a long time.

关键词： E-waste Human health risk Organ risk Heavy metal toxicity PBDE PCDD/F

HTML PDF 收藏

Molecular dynamics modeling of a single diamond abrasive grain in grinding

SAVVOPOULOS,Nikolaos E. KARKALOS,Dimitrios E. MANOLAKOS

《机械工程前沿（英文）》 2015年第10卷第2期页码 168-175 doi: 10.1007/s11465-015-0337-y

摘要：

In this paper the nano-metric simulation of grinding of copper with diamond abrasive grains, using the molecular dynamics (MD) method, is considered. An MD model of nano-scale grinding, where a single diamond abrasive grain performs cutting of a copper workpiece, is presented. The Morse potential function is used to simulate the interactions between the atoms involved in the procedure. In the proposed model, the abrasive grain follows a curved path with decreasing depth of cut within the workpiece to simulate the actual material removal process. Three different initial depths of cut, namely 4 ?, 8 ? and 12 ?, are tested, and the influence of the depth of cut on chip formation, cutting forces and workpiece temperatures are thoroughly investigated. The simulation results indicate that with the increase of the initial depth of cut, average cutting forces also increase and therefore the temperatures on the machined surface and within the workpiece increase as well. Furthermore, the effects of the different values of the simulation variables on the chip formation mechanism are studied and discussed. With the appropriate modifications, the proposed model can be used for the simulation of various nano-machining processes and operations, in which continuum mechanics cannot be applied or experimental techniques are subjected to limitations.

关键词： molecular dynamics abrasive process chip formation cutting force temperature

HTML PDF 收藏

Policy options for Agriculture Green Development by farmers in China

Laurence E. D. SMITH

《农业科学与工程前沿（英文）》 2020年第7卷第1期页码 90-97 doi: 10.15302/J-FASE-2019290

摘要：

Farmers are the key agents who manage land and water. Agriculture Green Development (AGD) requires a transformation in farming from high resource consumption and environmental cost to sustainable intensification with high productivity, high resource use efficiency and low environmental risk. This paper analyzes the public policy challenge of AGD and makes the case for a location-sensitive policy mix made up of regulation, advice provision, voluntarism and targeted incentives. The public agricultural extension service in China is a key resource, but one that requires reorientation and reform with the aim of better balancing high farm productivity with environmental protection.

关键词： agriculture environment development incentives policy regulation

HTML PDF 收藏

数字采矿技术在岩爆风险评估中的应用

Sousa Luis Ribeiro e,Miranda Tiago,Sousa Rita Leal e,Tinoco Joaquim

《工程（英文）》 2017年第3卷第4期页码 552-558 doi: 10.1016/J.ENG.2017.04.002

摘要：

目前在世界范围内的很多地下矿山，岩爆已经成为一个与矿山采矿生产密切相关的重要现象。深入理解这类现象，不仅有助于岩爆管理，而且还有可能节约采矿成本，减少人身伤亡事故。其中，实验室实验是深入研究岩爆机理的一个重要途径。在本文作者前期的研究中，已经建立了实验室岩爆实验数据库。与此同时，借助于数字采矿技术，也建立了岩爆最大应力和岩爆风险指数的预测模型。为实现基于矿山地质条件和矿山井巷建筑结构特性对岩爆类型即岩爆强度等级的准确预测，本文的重点是，基于对岩爆实例的分析来建立岩爆影响矩阵，明确岩爆现象的诱发因子，并厘清这些影响因子之间的相互关系。运用人工神经网络（ANN）和初始贝叶斯分类器等数字矿山技术，对矿山岩爆数据库进行了更深入的研究。最后给出了研究得出的各项结论。

关键词：岩爆数字采矿贝叶斯网络原位数据库

HTML PDF 收藏

Zero E-waste: Regulatory impediments and blockchain imperatives

Mengjun Chen, Oladele A. Ogunseitan

《环境科学与工程前沿（英文）》 2021年第15卷第6期 doi: 10.1007/s11783-021-1402-x

摘要： Abstract • Copyrights on electronic products are impediments in promoting circular economy. • Manufacturers antagonize refurbishment and remanufacturing to maximize profit. • International harmonization of copyright laws will aid repair and remanufacture. • Blockchain–digital immutable ledgers–can promote trust among stakeholders. The concept of zero waste is an ideal situation that will require different solutions for different categories of waste. Electronic waste (E-waste), the fastest growing category of solid hazardous waste presents various unique challenges. Electronic product repair, reuse and remanufacture (3re) are crucial for effective source reduction of E-waste and the integration of the electronics industry into a circular or zero-waste economy framework. Increasingly, 3re implementation is restricted by regulatory difficulties, particularly the invocation of copyright laws. Here, we use the examples of electronic printer cartridges and restored compact discs (CDs) to identify the challenges and to explore solutions for managing the risks associated with E-waste through circular economy and the opportunities presented by innovative Blockchain solutions. A set of international consensuses on judicial definitions, such as 3re, refurbish fake/counterfeit product and copyright exhaustion, are proposed to accelerate source reduction in E-waste management toward the goal of zero waste.

关键词： Blockchain E-waste Regulatory Policy Copyright Laws Repair-Reuse-Remanufacture Toxicity

HTML PDF 收藏

Investigation of electrochemical degradation and application of e-paper dyes in organic solvents

Luhai LI, Ming WANG, Yi FANG, Shunan QIAO

《化学科学与工程前沿（英文）》 2009年第3卷第2期页码 182-185 doi: 10.1007/s11705-009-0062-3

摘要： To avoid environmental pollution due to organic dye solutions, the electrophoresis and degradation of dye in organic solvents such as alcohol were investigated. Many dyes were tested in the Indium tin oxide (ITO) electrode driving cell, and about 15 dyes moved under voltage driving. Both the curves of ultraviolet-visible (UV-Vis) and infrared (IR) spectra of the electrophoresis samples showed that the metal complexes Red 04 and Acid Black 1 were degradable in alcohol solution by electrochemical reaction. The cyclic volt-ampere curves of the samples from the electrochemical working station proved that electrochemical reactions took place. Based on the analysis of UV-Vis and IR spectra, the electrochemical degradation products of azo and metal complex azo dyes at lower voltage driving (1-5 V) in organic solvents are oxidized azobenzene, not hydrazine, which was found in the electrochemical degradation of dye water solutions. When the ITO electrode is modified by a polyimide (PI) film to a thickness less than 4 μm, the electrochemical degradation of the dye in alcohol solution will not appear in the cyclic volt-ampere curves. A dye electrophoresis in organic solution flexible prototype e-paper display was formed and the display picture is shown.

关键词： electrochemical degradation electrophoresis e-paper oxidized azobenzene group

HTML PDF 收藏

Spent rechargeable lithium batteries in e-waste: composition and its implications

Xianlai ZENG,Jinhui LI

《环境科学与工程前沿（英文）》 2014年第8卷第5期页码 792-796 doi: 10.1007/s11783-014-0705-6

摘要： The amount of spent rechargeable lithium batteries (RLBs) is growing rapidly owing to wide application of these batteries in portable electronic devices and electric vehicles, which obliges that spent RLBs should be handled properly. Identification of spent RLBs can supply fundamental information for spent RLBs recycling. This study aimed to determine the differences of physical components and chemical compositions among various spent RLBs. All the samplings of RLBs were rigorously dismantled and measured by an inductive coupled plasma atomic emission spectrometer. The results indicate that the average of total weight of the separator, the anode and the cathode accounted for over 60% of all the RLBs. The weight ratio of valuable metals ranged from 26% to 76%, and approximately 20% of total weight was Cu and Al. Moreover, no significant differences were found among different manufacturers, applications, and electrolyte types. And regarding portable electronic devices, there is also no significant difference in the Co-Li concentration ratios in the leaching liquid of RLBs.

关键词： rechargeable lithium batteries e-waste physical components difference analysis recycling

HTML PDF 收藏

An improved design method to predict the E-modulus and strength of FRP composites at different temperatures

Mohammed FARUQI, Gobishanker RAJASKANTHAN, Breanna BAILEY, Francisco AGUINIGA

《结构与土木工程前沿（英文）》 2022年第16卷第12期页码 1653-1653 doi: 10.1007/s11709-019-0578-7

摘要： In recent years, there has been an increased interest in the use of fiber reinforced polymer (FRP) in the construction industry. However, the E-modulus and strength of such members at high service temperatures is still unknown. Modulus and strength of FRP at high service temperatures are highly required parameters for full design. The knowledge and application of this could lead to a cost effective and practical consideration in fire safety design. Thus, this paper proposes design methods for calculating the E-modulus and strength of FRP members at different temperatures. Experimental data from literature were normalized and compared with the results predicted by this method. It was found that the proposed design methods conservatively estimate the E-modulus and strength of FRP structural members. In addition, comparison was also made with direct references to the real behavior of materials. It was found to be satisfactory. Finally, an application is provided.

关键词： concrete fiber reinforced polymer E-modulus strength temperatures

HTML PDF 收藏

Electro-catalytic activity of CeO modified graphite felt for carbamazepine degradation via E-peroxone

《环境科学与工程前沿（英文）》 2021年第15卷第6期 doi: 10.1007/s11783-021-1410-x

摘要：

•CeO_x/GF-EP process had the better degradation efficiency than GF-EP process.

关键词： E-peroxone CeO_x Graphite felt Carbamazepine Mineralization

HTML PDF 收藏

Search for a natural scientific measure of economy

John E COULTER

《环境科学与工程前沿（英文）》 2011年第5卷第1期页码 111-118 doi: 10.1007/s11783-011-0285-7

摘要： Through human history, wealth has been measured in grain, gold, and, now, dollars. Though counterfeiting of coins and notes goes back a long way, it is only with electronic financial accounting in a global economy tainted by toxic loans and imaginary funds that there is an urgency to search for a realistic objective way to monitor and regulate what we are doing to our Earth and ourselves. Various schemes using analysis of utility functions, oil equivalents, entropy, energy, and other units have been tried and, while helping to understand some basic processes and flows, have always been swamped by the machinations of financiers and the attention big sums of money attract. Now, the concept of exergy, pioneered in Eastern Europe in the 1950s, is being researched, developed, and applied, especially in China, driven by the desperation to measure the reality beyond the twin specters of global financial and environmental crises. A rough inventory of the matter in the biosphere at the coordinate details of an angstrom and an appreciation of how humans harness and manipulate electromagnetic forces can be enlightening as to what is and is not sustainable. Without that understanding, any financial estimate and proposed stimulus packages or IMF reform will be wildly wrong and may even be headed in the wrong direction.

关键词： climate change financial crisis energy exergy environment