Search | Engineering

订阅投稿

首页学术期刊学术焦点学术视频工程成就工程前沿联系我们 English

资源类型

期刊论文 85

会议视频 3

年份

2023 4

2022 6

2021 6

2020 3

2019 8

2018 5

2017 12

2016 3

2015 3

2014 1

2013 5

2012 1

2011 2

2010 6

2009 6

2008 2

2007 5

2006 4

2005 1

2004 1

展开︾

关键词

选址 3

模糊优选 2

盾构选型 2

选型 2

2035年 1

AHP法 1

BP神经网络 1

SNP芯片 1

TOPSIS法 1

三塔悬索桥 1

三峡工程 1

上海港 1

中长期水文智能预报 1

井身结构 1

产业变革 1

人工智能 1

仿真技术 1

优化 1

优化设计 1

展开︾

检索范围：

排序：展示方式：

Review on ranking and selection: A new perspective

L. Jeff HONG, Weiwei FAN, Jun LUO

《工程管理前沿（英文）》 2021年第8卷第3期页码 321-343 doi: 10.1007/s42524-021-0152-6

摘要： In this paper, we briefly review the development of ranking and selection (R&S) in the past 70 years, especially the theoretical achievements and practical applications in the past 20 years. Different from the frequentist and Bayesian classifications adopted by Kim and Nelson (2006b) and Chick (2006) in their review articles, we categorize existing R&S procedures into fixed-precision and fixed-budget procedures, as in Hunter and Nelson (2017). We show that these two categories of procedures essentially differ in the underlying methodological formulations, i.e., they are built on hypothesis testing and dynamic programming, respectively. In light of this variation, we review in detail some well-known procedures in the literature and show how they fit into these two formulations. In addition, we discuss the use of R&S procedures in solving various practical problems and propose what we think are the important research questions in the field.

关键词： ranking and selection hypothesis testing dynamic programming simulation

HTML PDF 收藏

Control mode selection for modal control of long-span arch bridge

Zhengying LI, Zhengliang LI,

《结构与土木工程前沿（英文）》 2009年第3卷第4期页码 401-406 doi: 10.1007/s11709-009-0052-z

摘要： For seismic control of arch bridge, a model reduction of long-span arch bridge was implemented based on modal analysis. As for the critical mode selection, an approach based on the maximum modal displacement was presented. This approach takes into consideration the effect of external seismic excitation and is more reasonable than only considering dynamic bridge characteristics based on a modal contribution ratio. The time domain and frequency domain analysis method were used to verify the simplified model of the Nimu arch bridge in Tibet as an example. The numerical results show that the method of maximal modal displacement better analyze long-span arch bridge when multisupport seismic excitation must be considered. The reduced-order system also is more in line with the performance of the original model.

关键词： selection reduced-order excitation long-span simplified

HTML PDF 收藏

Supplier selection and order splitting in multiple-sourcing inventory systems

WANG Guicong, JIANG Zhaoliang, LI Zhaoqian, LIU Wenping

《机械工程前沿（英文）》 2008年第3卷第1期页码 23-27 doi: 10.1007/s11465-008-0016-3

摘要： Supplier selection and inventory control are critical decision processes in single-item multiple-supplier systems. An integer linear programming model is proposed to help managers determine the reorder level, choose the best suppliers, and place the optimum order quantities so that the total average inventory cost is minimum, and constraints of supplier ability, quality, and demand are considered. An algorithm combining the branch-bound algorithm and enumeration algorithm is developed to solve the problems. Application of the proposed model in an automobile industry shows that it is effective.

关键词： automobile industry branch-bound algorithm selection single-item multiple-supplier effective

HTML PDF 收藏

Genomic regions under selection for important traits in domestic horse breeds

Xuexue LIU, Yuehui MA, Lin JIANG

《农业科学与工程前沿（英文）》 2017年第4卷第3期页码 289-294 doi: 10.15302/J-FASE-2017155

摘要： Horses were domesticated 5500 years ago, thousands of years later than other domestic animals; however, in this relatively short period, domestic horses have had a great impact on human history by accelerating civilization, revolutionizing warfare and advancing agricultural production. Modern breeding using marker-assisted selection has greatly accelerated breeding progress. Therefore, identification of genetic markers underlying the traits of interest in domestic horses is the basis for the modern breeding system. In this review, we present an overview of genetic mapping studies and genome wide analyses to identify the genomic regions targeted by positive selection for four important aspects of horses, coat color, racing performance, gait and height at withers. The locus, for example, has been shown to be the main gene responsible for chestnut color, and the locus has been shown to control the muscle fiber growth in racing breeds. The missense mutation in is the causal mutation for the alternate gaits in horses. Height at withers, a quantitative trait, was mapped to four major loci (3:105547002, 6:81481064, 9:75550059 and 11:232597 32) that can explain 83% of the height variations in domestic horses.

关键词： horse coat color racing performance gait height

HTML PDF 收藏

Case-based reasoning for selection of the best practices in low-carbon city development

Zhenhua HUANG, Hongqin FAN, Liyin SHEN

《工程管理前沿（英文）》 2019年第6卷第3期页码 416-432 doi: 10.1007/s42524-019-0036-1

摘要： Cities emit extensive carbon emissions, which are considered a major contributor to the severe issue of climate change. Various low-carbon development programs have been initiated at the city level worldwide to address this problem. These practices are invaluable in promoting the development of low-carbon cities. Therefore, an effective approach should be developed to help decision makers select the best practices from previous experience on the basis of the impact features of carbon emission and city context features. This study introduces a case-based reasoning methodology for a specific city to select the best practices as references for low-carbon city development. The proposed methodology consists of three main components, namely, case representation, case retrieval, and case adaption and retention. For city representation, this study selects city context features and the impact features of carbon emission to characterize and represent a city. The proposed methodology is demonstrated by applying it to the selection of the best practices for low-carbon development of Chengdu City in Sichuan Province, China.

关键词： low-carbon city carbon emission best practices case-based reasoning

HTML PDF 收藏

复杂艰险山区地质勘察及选线技术

何华武,曾强运

《中国工程科学》 2009年第11卷第12期页码 9-12

摘要：

宜万铁路处于复杂艰险山区，其地形地质条件复杂，不良地质现象突出，简要介绍了宜万铁路地质问题特点、采取的综合地质勘察方法以及方案比选线等的相关情况，为类似工程的勘察及选线提供借鉴。

关键词：宜万铁路地质特点地质勘察地质选线

HTML PDF 收藏

Face recognition based on subset selection via metric learning on manifold

Hong SHAO,Shuang CHEN,Jie-yi ZHAO,Wen-cheng CUI,Tian-shu YU

《信息与电子工程前沿（英文）》 2015年第16卷第12期页码 1046-1058 doi: 10.1631/FITEE.1500085

摘要： With the development of face recognition using sparse representation based classification (SRC), many relevant methods have been proposed and investigated. However, when the dictionary is large and the representation is sparse, only a small proportion of the elements contributes to the 1-minimization. Under this observation, several approaches have been developed to carry out an efficient element selection procedure before SRC. In this paper, we employ a metric learning approach which helps find the active elements correctly by taking into account the interclass/intraclass relationship and manifold structure of face images. After the metric has been learned, a neighborhood graph is constructed in the projected space. A fast marching algorithm is used to rapidly select the subset from the graph, and SRC is implemented for classification. Experimental results show that our method achieves promising performance and significant efficiency enhancement.

关键词： Face recognition Sparse representation Manifold structure Metric learning Subset selection

HTML PDF 收藏

罗军：Treatment Selection in Prostate Cancer（2019年8月16日）

2021年04月22日

关键词：医学

北京铁路地下直径线盾构选型及功能设计

韩亚丽,吕传田,张宁川

《中国工程科学》 2010年第12卷第12期页码 29-34

摘要：

根据隧道直径的大小和地质等条件，分析北京铁路地下直径线隧道工程盾构法施工中盾构设备选型考虑的因素及选择的机型，确定盾构机型配置的主要功能及对地质的适应性，并对盾构主要结构数据和配备能力进行了计算和描述。提出了盾构选型和设计中需要注意的事项和问题。

关键词：铁路地下直径线盾构选型盾构功能设计

HTML PDF 收藏

页岩气主要富集因素与核心区选择及评价

王社教,杨涛,张国生,李登华,陈晓明

《中国工程科学》 2012年第14卷第6期页码 94-100

摘要：

影响页岩气规模开发的因素很多，最核心的因素是首先要通过建立地质评价标准，选出页岩气核心区。核心区的确定关系到在页岩气勘探初期，是否能找准页岩气最富集的目标，选择最有利地区进行勘探，突破出气关，进而实现大规模经济开发。从页岩气成藏特征、页岩气富集因素分析入手，重点探讨我国富有机质页岩的丰度、成熟度、脆性矿物含量、含气性以及盖层等关键参数及其作用。借鉴北美页岩气勘探开发和研究成果，结合我国页岩气勘探开发和研究新进展，初步建立我国页岩气核心区地质评价标准，并优选出我国南方海相页岩气的核心区，指出四川盆地南部是我国最现实的页岩气开发区。

关键词：核心区选区与评价富集因素海相页岩页岩气

HTML PDF 收藏

基于注意机制编码解码模型的答案选择方法 Article

Yuan-ping NIE, Yi HAN, Jiu-ming HUANG, Bo JIAO, Ai-ping LI

《信息与电子工程前沿（英文）》 2017年第18卷第4期页码 535-544 doi: 10.1631/FITEE.1601232

摘要：问答技术的重要挑战之一就是解决问题与答案之间的语义空白。机器翻译模型已经被证明能有效的提升解决问题与答案之间的语义空白的效果。本文提出了一种基于注意机制的深度神经网络模型来解决问答系统中的答案选择任务。该模型采用了基于双向LSTM的编码解码模型，编码解码模型是一个被证明再机器翻译领域取得了突出的成绩。我们还在模型中应用了注意力机制来提升模型的效果。本文在一个公开数据集上验证我们实验的有效性，同时通过结合该模型显著提高了我们的问答系统的性能在TREC liveQA 2015的任务中。

关键词：问答技术、答案选择、注意机制、深度学习

HTML PDF 收藏

High cadmium pollution risk on vegetable amaranth and a selection for pollution-safe cultivars to lower

Yihui ZHOU, Meng XUE, Zhongyi YANG, Yulian GONG, Jiangang YUAN, Chunyan ZHOU, Baifei HUANG

《环境科学与工程前沿（英文）》 2013年第7卷第2期页码 219-230 doi: 10.1007/s11783-012-0469-9

摘要： A pot experiment was carried out by growing 29 different genotypes ( spp.) of vegetable amaranth under low- (0.12 mg·kg ) and middle- (0.40 mg·kg ) cadmium (Cd) exposure. The result showed that amaranth was vulnerable to cadmium (Cd) contamination in soil. Variations of Cd concentrations in both roots and edible parts among genotypes were significant ( <0.001) in both treatments. Cd concentrations in edible parts of the tested genotypes grown under low- and middle-Cd levels were significantly correlated ( <0.01), implying that Cd-accumulating property of amaranth is genotype-dependent. Differences in Cd chemical forms between cv. Nanxingdayemashixian (cv. Nan), a selected typical pollution-safe cultivar (Cd-PSC), and cv. Pennongjianyexian (cv. Pen), a selected typical non-Cd-PSC, under different Cd exposure conditions were compared. It was found that the alternation of Cd in F (Cd form extracted by 1 mol·L NaCl) may be a key factor in regulating Cd accumulation of different amaranth genotypes and that the protein-binding Cd is considered to be associated with Cd translocation. The results indicated that amaranth is capable of enduring high level of Cd pollution when grown as vegetable crop, and accordingly, consuming vegetable amaranth would bring high health risk. Therefore, adopting Cd-PSC strategy would help reducing the risk of Cd pollution in amaranth. In this study, cv. Nan was identified as a Cd-PSC and recommended to be applied production practice.

关键词： Amaranth Cadmium (Cd) Cd accumulation pollution-safe cultivar (PSC) Cd chemical forms health risk

HTML PDF 收藏

宿主微生物组内的基因组突变——适应性进化或纯化选择 Review

张家超, Rob Knight

《工程（英文）》 2023年第20卷第1期页码 96-102 doi: 10.1016/j.eng.2021.11.018

摘要：

Next-generation sequencing technology has transformed our ability to assess the taxonomic composition functions of host-associated microbiota and microbiomes. More human microbiome research projects—particularly those that explore genomic mutations within the microbiome—will be launched in the next decade. This review focuses on the coevolution of microbes within a microbiome, which shapes strain-level diversity both within and between host species. We also explore the correlation between microbial genomic mutations and common metabolic diseases, and the adaptive evolution of pathogens and probiotics during invasion and colonization. Finally, we discuss advances in methods and algorithms for annotating and analyzing microbial genomic mutations.

关键词：肠道微生物群基因组突变适应性进化纯化选择单核苷酸变体

HTML PDF 收藏

Preparation and selection of Fe-Cu sorbent for COS removal in syngas

Bowu CHENG, Zhaofei CAO, Yong BAI, Dexiang ZHANG

《化学科学与工程前沿（英文）》 2010年第4卷第4期页码 441-444 doi: 10.1007/s11705-010-0507-8

摘要： A series of iron-based sorbents prepared with iron trioxide hydrate, cupric oxide by a novel method was studied in a fixed-bed reactor for COS removal from syngas at moderate temperature. In addition, the sorbents mixed with various additives in different ratios were tested. The effects of additive type and ratio on the breakthrough capacity and desulfurization performance, as well as the influence of operating conditions on sulfidation behavior of the sorbent, were investigated. The simulate gas contained 1% COS, 5% CO , 20%–30% CO and 60%–70% H . The outlet gases from the fixed-bed reactor were automatically analyzed by on-line mass spectrometry, and the COS concentration before breakthrough can be kept steady at 1 ppmv. The result shows that the breakthrough sulfur capacity of the sorbent is as high as 25 g-S/100 g. At 700 K and space velocity of 1000 h , the efficiency of sulfur removal and breakthrough sulfur capacity of the sorbent increase with the increase of copper oxide with an optimum value. The result shows that the species and content of additives also affect desulfurization performance of the sorbent.

关键词： sorbent desulfurization COS removal syngas

HTML PDF 收藏

我国探月工程运载火箭选型问题探讨

龙乐豪

《中国工程科学》 2002年第4卷第9期页码 31-37

摘要：

“发展空间科学，开展深空探测”是我国近期（2010年前后）的航天发展目标之一，月球探测是实现我国“开展深空探测”的第一步。发射月球探测器（或卫星）选择适当的火箭型号显得尤其重要。文章从月球探测工程对运载火箭的基本要求着手，结合国外月球探测工程的经验和长征系列火箭的现状，提出了候选火箭及其改造方案，并且对月球探测三种运行轨道的优缺点和工程的可实现性进行了分析。从航天大系统工程整体化的角度，提出了用长征三号乙加上面级发射环月卫星，同时将上面级实现硬（或软）着陆作为首选方案，用长征三号丙发射探月器进入奔月轨道作为次选方案的建议。

关键词：探月工程运载火箭选型研究