资源类型

期刊论文 509

年份

2024 2

2023 25

2022 24

2021 26

2020 25

2019 25

2018 14

2017 19

2016 35

2015 17

2014 14

2013 23

2012 12

2011 29

2010 33

2009 30

2008 32

2007 40

2006 21

2005 12

展开 ︾

关键词

数值模拟 26

仿真 15

可视化仿真 4

计算机模拟 4

系统仿真 3

Agent 2

HLA/RTI 2

优化 2

体系结构 2

力学模型 2

动态模拟 2

卫星 2

复杂系统 2

建模仿真 2

模拟 2

模糊控制 2

4D CAD 1

AF/PSTM 1

ANSYS/LS-DYNA 1

展开 ︾

检索范围：

排序： 展示方式：

Construction Duration and Cost Simulation via Network-Program-Diagram

Wei-dong Wang,Jie Wu,Kai-jun Wang,Xin Wen

《工程管理前沿（英文）》 2014年 第1卷 第2期   页码 210-217 doi: 10.15302/J-FEM-2014028

摘要： This paper outlines the creation of a simulation model used to extrapolate duration and resource requirements needed for the construction of bridges based on a sampling of data obtained during a field research conducted on the construction process of a single bridge. A sampling of statistical data was taken during a field investigation to measure schedule and resource requirements (labor, raw materials and machinery) at various stages of a bridge construction project. This data was used to identify the probability distribution and the associated parameters for the project examined, and a simulation model was built to extrapolate the necessary schedule and resource requirements needed for various stages of similar bridge projects based on Three-Point Estimation Method of Program Evaluation and Review Technique (PERT) and Monte Carlo Method. This simulation model’s resultant data for every process in an applicable construction project can be aggregated to form overall project duration and resource requirement statistical distribution using the Critical Path Method (CPM). The whole construction process will be visualized by a 4-dimensional (4D) model of the project which is created by appending time and resource requirements and to the 3-dimensional (3D) model that is built using the Building Information Modeling (BIM) and Alternativa 3D technology. Based on the simulation results of every procedure’s duration and resource requirements, the Network Program Diagram and Gantt Chart can be drawn with Flex and ActionScript language. Furthermore, with the Network Program Diagram at the core, the 4D model can incorporate simulation’s resultant data with respect to total time and cost of the project to show the condition of resource requirements and the project’s progressing at any time.

关键词： construction duration     construction cost     activity-on-node diagram     building information modeling    

HTML PDF 收藏

Numerical simulation and analysis for collapse responses of RC frame structures under earthquake

Fuwen ZHANG, Xilin LU, Chao YIN,

《结构与土木工程前沿（英文）》 2009年 第3卷 第4期   页码 364-369 doi: 10.1007/s11709-009-0061-y

摘要： In this paper, a discrete element model for collapse simulation of RC frame structure is constructed by discretizing the structure into a few elements and spring groups. This model introduces special hysteretic models of connected springs for arbitrary loading path and also takes into account reasonable failure criteria for springs considering coupling effect of shear and axial force. Based on the discrete element model, a computer program is developed to simulate the whole process of RC frame structures from initial state to collapse under earthquakes. Particularly, the contact-impact problem between discrete elements has been treated with effective measures. Then, the program is employed to study the collapse mechanism of a real building in Wenchuan earthquake-hit area; the result of which shows that the simulation program developed based on the new model can realistically simulate the seismic collapse process of RC frame structures.

关键词： discrete element method     failure criteria     contact-impact     simulation program    

HTML PDF 收藏

A two-dimensional numerical model for eutrophication in Baiyangdian Lake

Xudong WANG, Shushen ZHANG, Suling LIU, Jingwen CHEN

《环境科学与工程前沿（英文）》 2012年 第6卷 第6期   页码 815-824 doi: 10.1007/s11783-011-0383-6

摘要： Hydrodynamic, physical, and biochemical processes in the Baiyangdian Lake water environment were analyzed comprehensively. An eutrophication eco-dynamics model including the effects of reed resistance on flow was coupled with the hydrodynamics governing equations. An improvement on the Water Quality Analysis Simulation Program (WASP, a modeling system introduced by the US Environmental Protection Agency) is established, which uses the zooplankton kinetic equation. The model simulates water quality constituents associated with eutrophication in the lake, including phytoplankton, zooplankton, nitrogen, phosphorus, dissolved oxygen, and others. Various kinetic coefficients were calibrated using measured data or information from relevant literature, to study eutrophication in the lake. The values calculated by the calibrated model agree well with field data, including ammonia nitrogen, total nitrogen, total phosphorus and dissolved oxygen. Changes related to nutrition and dissolved oxygen during the processes were simulated. The present model describes the temporal variation of water quality in Baiyangdian Lake with reasonable accuracy. Deviations between model-simulated and observed values are discussed. As an ideal tool for environmental management of the lake, this model can be used to predict its water quality, and be used in research to examine the eutrophication process.

关键词： eutrophication     eco-dynamics     hydrodynamics     improved Water Quality Analysis Simulation Program (WASP) model     Baiyangdian Lake    

HTML PDF 收藏

Sustainable Program Quality Management of International Infrastructure Construction

Steve Hsueh-Ming Wang

《工程管理前沿（英文）》 2016年 第3卷 第3期   页码 239-245 doi: 10.15302/J-FEM-2016047

摘要： Management of the program quality for international infrastructure construction projects is complicated. Sustainability of these programs is the key for them to succeed in their lifecycles. This paper investigated current program quality management and compared it with the results of recent surveys of KGMP. A method for the sustainable program quality management of the international infrastructure construction management is proposed and demonstrated by research projects. The cycle of accountability, predictability, balance ability, and policy was proposed. The findings from the KGMP’s survey and this research show that the trend of the sustainable program quality management of the international infrastructure construction is transferring from agility to alacrity in the balancing of the metrics among economy, ecology, culture, and politics.

关键词： sustainability     program     infrastructure    

HTML PDF 收藏

Achievements of the national malaria control and elimination program in the People’s Republic of China

《医学前沿（英文）》 2023年 第17卷 第1期   页码 85-92 doi: 10.1007/s11684-021-0917-7

摘要： In 2017, China achieved the target of zero indigenous malaria case for the first time, and has been certified as malaria free by World Health Organization in 2021. To further summarize the historical achievements and technical experiences of the elimination program, a project on the Roadmap Analysis and Verification for Malaria Elimination in China was carried out. Results of the project were compiled and published as the Atlas of Malaria Transmission in China (The Atlas). The Atlas using modern digital information technologies, has been supported by various data from 24 malaria endemic provinces of China since 1950, to assess the changes in malaria epidemic patterns from 1950 to 2019 at national and provincial levels. The Atlas is designed as two volumes, including a total of 1850 thematic maps and more than 130 charts, consisting of introductory maps, thematic maps of malaria epidemic and control at national and provincial levels. It objectively and directly shows the epidemic history, evolution process, and great achievements of the national malaria control and elimination program in China. The Atlas has important reference value for summing up historical experience in the national malaria elimination program of China, and malaria control and elimination in other endemic countries in the world.

关键词： malaria     transmission     control     elimination     China     atlas    

HTML PDF 收藏

Risk evaluation for the task transfer of an aircraft maintenance program based on a multielement connection

《工程管理前沿（英文）》 doi: 10.1007/s42524-023-0282-0

摘要： This paper proposes a framework for evaluating the efficacy and suitability of maintenance programs with a focus on quantitative risk assessment in the domain of aircraft maintenance task transfer. The analysis is anchored in the principles of Maintenance Steering Group-3 (MSG-3) logic decision paradigms. The paper advances a holistic risk assessment index architecture tailored for the task transfer of maintenance programs. Utilizing the analytic network process (ANP), the study quantifies the weight interrelationships among diverse variables, incorporating expert-elicited subjective weighting. A multielement connection number-based evaluative model is employed to characterize decision-specific data, thereby facilitating the quantification of task transfer-associated risk through the appraisal of set-pair potentials. Moreover, the paper conducts a temporal risk trend analysis founded on partial connection numbers of varying orders. This analytical construct serves to streamline the process of risk assessment pertinent to maintenance program task transfer. The empirical component of this research, exemplified through a case study of the Boeing 737NG aircraft maintenance program, corroborates the methodological robustness and pragmatic applicability of the proposed framework in the quantification and analysis of mission transfer risk.

关键词： risk evaluation     maintenance steering group     analytic network process     task transfer     maintenance program    

HTML PDF 收藏

Status of hyperhomocysteinemia in China: results from the China Stroke High-risk Population Screening Program

《医学前沿（英文）》 2021年 第15卷 第6期   页码 903-912 doi: 10.1007/s11684-021-0871-4

摘要： A nationwide survey was conducted from October 2018 to September 2019 to assess the prevalence of hyperhomocysteinemia (Hhcy) and its influencing factors in China. A standardized questionnaire was used to collect information. Hhcy was defined as the level of serum homocysteine (HCY) ≥15.0 µmol/L. The H-type hypertension (HHYP) was defined as hypertension with an elevated serum HCY (≥15.0 µmol/L). Finally, 110 551 residents ≥40 years of age from 31 provinces in the mainland of China were included. Overall, the median serum HCY level was 10.9 µmol/L (interquartile range 7.9–15.1). A total of 28 633 participants (25.9%) were defined as Hhcy. The Hhcy prevalence ranged from 7.9% in Shanghai to 56.8% in Tianjin. The data showed that serum HCY levels were associated with age, male gender, cigarette smoking, hypertension, diabetes, ethnicity, endurance in exercise (inverse), and fruit and vegetable intake (inverse). In addition, 15 486 participants were defined as HHYP, and the rate was 14.0%. HHYP was an independent predictor of stroke with an adjusted odds ratio of 1.752 (95% CI 1.338–2.105). The geographical distribution pattern of the Hhcy epidemic reflects dynamic differences, and national strategies should be carried out to further improve the care of patients with Hhcy across China.

关键词： homocysteine     hyperhomocysteinemia     H-type hypertension     Chinese    

HTML PDF 收藏

Cultural differences define diagnosis and genomic medicine practice: implications for undiagnosed diseases program

null

《医学前沿（英文）》 2013年 第7卷 第3期   页码 389-394 doi: 10.1007/s11684-013-0281-3

摘要：

Despite the current acceleration and increasing leadership of Chinese genetics research, genetics and its clinical application have largely been imported to China from the Occident. Neither genetics nor the scientific reductionism underpinning its clinical application is integral to the traditional Chinese worldview. Given that disease concepts and their incumbent diagnoses are historically derived and culturally meaningful, we hypothesize that the cultural expectations of genetic diagnoses and medical genetics practice differ between the Occident and China. Specifically, we suggest that an undiagnosed diseases program in China will differ from the recently established Undiagnosed Diseases Program at the United States National Institutes of Health; a culturally sensitive concept will integrate traditional Chinese understanding of disease with the scientific reductionism of Occidental medicine.

关键词： genetics     cultural differences     undiagnosed diseases program    

HTML PDF 收藏

The development of roadside green swales in the Chinese Sponge City Program: Challenges and opportunities

《工程管理前沿（英文）》   页码 566-581 doi: 10.1007/s42524-023-0267-z

摘要： Roadside green swales have emerged as popular stormwater management infrastructure in urban areas, serving to mitigate stormwater pollution and reduce urban surface water discharge. However, there is a limited understanding of the various types, structures, and functions of swales, as well as the potential challenges they may face in the future. In recent years, China has witnessed a surge in the adoption of roadside green swales, especially as part of the prestigious Sponge City Program (SCP). These green swales play a crucial role in controlling stormwater pollution and conserving urban water resources by effectively removing runoff pollutants, including suspended solids, nitrogen, and phosphorus. This review critically examines recent research findings, identifies key knowledge gaps, and presents future recommendations for designing green swales for effective stormwater management, with a particular emphasis on ongoing major Chinese infrastructure projects. Despite the growing global interest in bioswales and their significance in urban development, China’s current classification of such features lacks a clear definition or specific consideration of bioswales. Furthermore, policymakers have often underestimated the adverse environmental effects of road networks, as reflected in existing laws and planning documents. This review argues that the construction and maintenance of roadside green swales should be primarily based on three critical factors: Well-thought-out road planning, suitable construction conditions, and sustainable long-term funding. The integration of quantitative environmental standards into road planning is essential to effectively address the challenge of pollution from rainfall runoff. To combat pollution associated with roads, a comprehensive assessment of potential pollution loadings should be carried out, guiding the appropriate design and construction of green swales, with a particular focus on addressing the phenomenon of first flush. One of the major challenges faced in sustaining funds for ongoing maintenance after swale construction. To address this issue, the implementation of a green finance platform is proposed. Such a platform would help ensure the availability of funds for continuous maintenance, thus maximizing the long-term effectiveness of green swales in stormwater management. Ultimately, the findings of this review aim to assist municipal governments in enhancing and implementing future urban road designs and SCP developments, incorporating effective green swale strategies.

关键词： grass swale     infiltration swale     bioswale     wet swale     sponge city    

HTML PDF 收藏

Implementation of a flexible Major Vacation Toll-free Program for small passenger vehicles in China

Meng XU, Ziyou GAO

《工程管理前沿（英文）》 2017年 第4卷 第4期   页码 498-499 doi: 10.15302/J-FEM-2017111

HTML PDF 收藏

Strategic Project Management to Use the Grand Challenge Scholars Program to Address Urban Infrastructure

David A. Wyrick,Warren Myers

《工程管理前沿（英文）》 2016年 第3卷 第3期   页码 203-205 doi: 10.15302/J-FEM-2016046

摘要： Throughout the world, infrastructure to support cities is critical to support sustainable and responsible economic development. This can include new infrastructure projects in the case of growing areas. It can also include the renewal and upgrading of existing infrastructure in areas that have been inhabited and already developed. Infrastructure includes roads, bridges and transportation systems; power grids and energy service; internet and telecommunications; and water and sewer services. This development can be part of a system of systems, in which government, industries, and universities can contribute knowledge, skills, and abilities. This paper will investigate the strategic project management taken by one university to provide an academic experience that will prepare engineering students to address several of the Grand Engineering Challenges of the 21st Century, as identified by the US National Academy of Engineering. The challenges relating to energy, water, information, and urban infrastructure can be approached using the functions of teaching, research, and service. By approaching the challenges strategically, resources of faculty time, student effort and laboratory facilities can be leveraged to achieve greater results. This case study will describe the efforts and results to date and identify opportunities for future growth.

关键词： Grand Challenges     urban infrastructure development     engineering management     system of systems     strategic management     engineering management case study    

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    

HTML PDF 收藏

渤海海峡隧道施工通风方案探讨

吴元金,邹翀

《中国工程科学》 2013年 第15卷 第12期   页码 90-94

摘要：

由于海上施工竖井布设难度大，致使渤海海峡隧道独头单口掘进长度加大，几个工作面独头单口掘进长度都在25 km左右。本文采用渤海海峡隧道现有的设想方案，通过通风方式的选择、通风计算和通风设备选型对本工程的施工通风进行研究，提出利用巷道式通风解决独头单口掘进25 km隧道施工通风的方案，为渤海海峡隧道的可行性研究提供施工通风方面的技术支持。

关键词： 渤海海峡隧道     施工通风     巷道式通风     方案设计    

HTML PDF 收藏

自适应自动程序设计及其在自动售货机中的应用

余世明,丁国正,刘立峰

《中国工程科学》 2007年 第9卷 第11期   页码 147-150

摘要：

对程序故障的处理，通常可以使用返回值或异常来报告。但当状态模型中的程序出现故障后，使程 序仍能回到出现故障处的状态或做进一步的处理，这是返回值或异常做不到的。针对自动处理的实现，提出 了采用组合编码和状态冗余设计相结合的自动程序设计思想，给出了它的一个结构模型和算法。模型通过 减少程序的状态切换故障（预防）和增加系统的故障恢复能力（治疗）来实现这个目标。最后，将这个设计模 型部分成功地应用到自动售货机上，实际运行效果良好。

关键词： 自适应     状态冗余设计     自动程序设计     故障恢复     自动售货机    

HTML PDF 收藏

International Winter Wheat Improvement Program: history, activities, impact and future

Alexey MORGOUNOV, Fatih OZDEMIR, Mesut KESER, Beyhan AKIN, Thomas PAYNE, Hans-Joachim BRAUN

《农业科学与工程前沿（英文）》 2019年 第6卷 第3期   页码 240-250 doi: 10.15302/J-FASE-2019261

摘要：

International Winter Wheat Improvement Program (IWWIP) was established in 1986 between the Government of Turkey and CIMMYT with three main objectives: (1) develop winter/facultative germplasm for Central and West Asia, (2) facilitate global winter wheat germplasm exchange, and (3) training wheat scientists. ICARDA joined the program in 1991 making it a three-way partnership that continues to work effectively. The germplasm developed by IWWIP as well as the winter wheat cultivars and lines received from global cooperators are assembled into international nurseries. These nurseries are offered annually to public and private entities (IWWIP website) and distributed to more than 100 cooperators in all continents. IWWIP impact has primarily been in new winter wheat cultivars combining broad adaptation, high yield potential, drought tolerance and disease resistance. A total of 93 IWWIP cultivars have been released in 11 countries occupying annually an estimated 2.5–3.0 Mha. IWWIP cooperation with researchers in Turkey, Central and West Asia and several US universities has resulted in a number of publications reviewed in this paper. Important IWWIP impacts include national inventories of wheat landraces in Turkey, Tajikistan and Uzbekistan, their collection, characterization, evaluation and utilization.

关键词： biotic and abiotic stresses     breeding     methodology     winter wheat    

HTML PDF 收藏

标题 作者 时间 类型 操作

Construction Duration and Cost Simulation via Network-Program-Diagram

Wei-dong Wang,Jie Wu,Kai-jun Wang,Xin Wen

期刊论文

Numerical simulation and analysis for collapse responses of RC frame structures under earthquake

Fuwen ZHANG, Xilin LU, Chao YIN,

期刊论文

A two-dimensional numerical model for eutrophication in Baiyangdian Lake

Xudong WANG, Shushen ZHANG, Suling LIU, Jingwen CHEN

期刊论文

Sustainable Program Quality Management of International Infrastructure Construction

Steve Hsueh-Ming Wang

期刊论文

Achievements of the national malaria control and elimination program in the People’s Republic of China

期刊论文

Risk evaluation for the task transfer of an aircraft maintenance program based on a multielement connection

期刊论文

Status of hyperhomocysteinemia in China: results from the China Stroke High-risk Population Screening Program

期刊论文

Cultural differences define diagnosis and genomic medicine practice: implications for undiagnosed diseases program

null

期刊论文

The development of roadside green swales in the Chinese Sponge City Program: Challenges and opportunities

期刊论文

Implementation of a flexible Major Vacation Toll-free Program for small passenger vehicles in China

Meng XU, Ziyou GAO

期刊论文

Strategic Project Management to Use the Grand Challenge Scholars Program to Address Urban Infrastructure

David A. Wyrick,Warren Myers

期刊论文

我国探月工程运载火箭选型问题探讨

龙乐豪

期刊论文

渤海海峡隧道施工通风方案探讨

吴元金,邹翀

期刊论文

自适应自动程序设计及其在自动售货机中的应用

余世明,丁国正,刘立峰

期刊论文

International Winter Wheat Improvement Program: history, activities, impact and future

Alexey MORGOUNOV, Fatih OZDEMIR, Mesut KESER, Beyhan AKIN, Thomas PAYNE, Hans-Joachim BRAUN

期刊论文