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 52

会议信息 3

年份

2023 2

2022 3

2021 2

2020 4

2019 4

2016 3

2014 1

2013 1

2011 1

2009 1

2006 1

2005 1

2004 1

2003 3

2002 5

2001 5

2000 12

1999 5

展开︾

关键词

21世纪 3

21世纪海上丝绸之路 2

水资源 2

Electron 1

Photo-emission 1

ST34 1

WTO 1

field-emission 1

“纺织科学与工程”学科 1

中国最具影响力 1

中国谱系 1

产业用纺织品 1

人居环境 1

人类生活与生存 1

低温铝电解 1

供应链管理 1

信息技术 1

储氢合金 1

催化剂 1

展开︾

检索范围：

排序：展示方式：

Ultrafast-laser-treated poly(3,4-ethylenedioxythiophene): poly(styrenesulfonate) electrodes with enhanced conductivity and transparency for semitransparent perovskite solar cells

《化学科学与工程前沿（英文）》 2023年第17卷第2期页码 206-216 doi: 10.1007/s11705-022-2203-x

摘要： Poly(3,4-ethylenedioxythiophene):poly(styrenesulfonate) (PEDOT:PSS) is an important organic electrode for solution-processed low-cost electronic devices. However, it requires doping and post-solvent treatment to improve its conductivity, and the chemicals used for such treatments may affect the device fabrication process. In this study, we developed a novel route for exploiting ultrafast lasers (femtosecond and picosecond laser) to simultaneously enhance the conductivity and transparency of PEDOT:PSS films and fabricate patterned solution-processed electrodes for electronic devices. The conductivity of the PEDOT:PSS film was improved by three orders of magnitude (from 3.1 to 1024 S·cm^–1), and high transparency of up to 88.5% (average visible transmittance, AVT) was achieved. Raman and depth-profiling X-ray photoelectron spectroscopy revealed that the oxidation level of PEDOT was enhanced, thereby increasing the carrier concentration. The surface PSS content also decreased, which is beneficial to the carrier mobility, resulting in significantly enhanced electrical conductivity. Further, we fabricated semitransparent perovskite solar cells using the as-made PEDOT:PSS as the transparent top electrodes, and a power conversion efficiency of 7.39% was achieved with 22.63% AVT. Thus, the proposed route for synthesizing conductive and transparent electrodes is promising for vacuum and doping-free electronics.

关键词： PEDOT:PSS ultrafast laser transparent electrode ST-PSCs patterning

HTML PDF 收藏

Silk Roads for the 21st Century: Engineering Mega-Infrastructure for Development and Sustainability

Tony Marjoram

《工程管理前沿（英文）》 2016年第3卷第3期页码 187-196 doi: 10.15302/J-FEM-2016038

摘要： Infrastructure facilitates the movement of people, the production and distribution of goods and services, and underpins development. Infrastructure is expensive and long-lasting, and needs long-term policy, planning and management, in terms of design, construction, operation and maintenance. Infrastructure relates particularly to engineering and technology. All technological change brings economic, social, cultural and environmental change, planned and unpredicted. Mega levels of technology bring mega levels of change, effects and impacts. Mega infrastructure such as the Silk Road Economic Belt and 21st Century Maritime Silk Road, the “One Belt, One Road” (OBOR) initiative, announced by President Xi Jinping in 2013, will require equally mega policy, planning and management. This paper will discuss policy, planning and management issues relating to mega infrastructure and the OBOR initiative, with particular reference to energy, communications, transportation, health, emergency preparedness and response, and less predictable areas of change, for example in disease prevention and control, within the overall need for economic, environmental and ecological sustainability. The paper will discuss associated needs for education, training and capacity building in engineering. The paper will also refer to lessons learnt from the original Silk Road in the context of the development of civilizations and intercultural dialogue through the transfer of goods, services, technologies, ideas, knowledge, customs, cultures and philosophies, less predictable and unwanted transfers, for example of disease, and the need for awareness, policy, planning and management of such wider issues.

关键词： infrastructure growth development sustainability change new Silk Roads

HTML PDF 收藏

Digital manufacturing—the development direction of the manufacturing technology in the 21st century

XIONG You-lun, YIN Zhou-ping

《机械工程前沿（英文）》 2006年第1卷第2期页码 125-130 doi: 10.1007/s11465-006-0021-3

摘要： After introducing the concepts of digital manufacturing technology, the discipline framework of digital manufacturing is presented in the paper by discussing its basic concept, theory foundation, key technology and scientific problems in detail. As the core of the advanced manufacturing technology, digital manufacturing is gradually becoming the main manufacturing technology of the twenty-first century. Firstly, the main features of digital manufacturing are indicated and its key supporting technologies are investigated by grouping them into four levels related to product development, numerical control, production management, and enterprise collaboration, respectively. Moreover, the existing problems in the research on the multi-discipline theory foundation of digital manufacturing such as manufacturing informatics, computational manufacturing, and manufacturing intelligence, are also indicated. Then, the core scientific problems of digital manufacturing are discussed in depth, which focuses on digitization of manufacturing information, modeling of manufacturing constraints, high-speed and high-precision numerical control theory, and Internet-based collaboration and integration. Lastly, the development trends and application perspectives of digital manufacturing are concluded.

关键词： development foundation multi-discipline scientific supporting

HTML PDF 收藏

Livestock breeding for the 21st century: the promise of the editing revolution

Chris PROUDFOOT, Gus MCFARLANE, Bruce WHITELAW, Simon LILLICO

《农业科学与工程前沿（英文）》 2020年第7卷第2期页码 129-135 doi: 10.15302/J-FASE-2019304

摘要：

In recent years there has been a veritable explosion in the use of genome editors to create site-specific changes, both and , to the genomes of a multitude of species for both basic research and biotechnology. Livestock, which form a vital component of most societies, are no exception. While selective breeding has been hugely successful at enhancing some production traits, the rate of progress is often slow and is limited to variants that exist within the breeding population. Genome editing provides the potential to move traits between breeds, in a single generation, with no impact on existing productivity or to develop phenotypes that tackle intractable issues such as disease. As such, genome editors provide huge potential for ongoing livestock development programs in light of increased demand and disease challenge. This review will highlight some of the more notable agricultural applications of this technology in livestock.

关键词： cattle pig sheep chicken aquaculture CRISPR

HTML PDF 收藏

Sustainable intensification of agriculture is key to feeding Africa in the 21st century

Shenggen FAN

《农业科学与工程前沿（英文）》 2020年第7卷第4期页码 366-370 doi: 10.15302/J-FASE-2020342

摘要：

Africa in facing numerous challenges in the 21st century in feeding its rapidly increasing population. Land resources have become limited due to urbanization and industrialization. The existing agricultural land has been degraded and soil fertility has declined due to unsustainable farming practices. Despite of progress made in the past several decades, hunger and malnutrition in Africa still hinder health, human development and economic growth, which will become even worse in the future if proper measures are not taken. Sustainable intensification is the only solution to tackling both environmental sustainability including climate change and malnutrition, i.e., to produce more foods in terms of nutrients human body needs with less natural resources and carbon emissions. To achieve this vision, innovations in technologies, policies and institutions are essential. The Chinese experience in Agricultural Green Development (AGD) can be shared with Africans when the region is pursuing its sustainable intensification strategy.

关键词： Africa sustainable intensification Agricultural Green Development climate change malnutrition

HTML PDF 收藏

21世纪油气工业发展刍议

陈俊武

《中国工程科学》 2000年第2卷第4期页码 21-24

摘要：

文章从世界能源消费不断增长的社会发展需求出发，考虑日益苛刻的环境保护政策和举世关心的可持续发展的战略方针，结合今后科学技术的进展，分别从产品需求和资源供应、产品规格和环境保护、非常规石油进入角色及天然气前景引人瞩目四个专题进行论述，对21世纪的以石油和天然气为代表的非再生能源工业形势做了初步展望。

关键词： 21世纪石油天然气油气工业

HTML PDF 收藏

2008—2017年河南省腹泻患者来源单相鼠伤寒沙门菌ST34的基因组流行病学特征研究 Article

穆玉娇, 李瑞超, 杜鹏程, 张沛, 李岩, 崔生辉, Séamus Fanning, 白莉

《工程（英文）》 2022年第15卷第8期页码 34-44 doi: 10.1016/j.eng.2022.05.006

摘要：本研究对2008-2017年分离自腹泻患者的100株序列型34型（ST34）S. 4,[5],12:i:-开展的流行情况、耐药表型和群体基因组学的分析发现：多数菌株对氨苄西林、链霉素、

关键词：单相鼠伤寒沙门菌 ST34 流行系统发育中国谱系

HTML PDF 收藏

An Algorithm to compute damage from load in composites

DUNANT, Stéphane P. A. BORDAS, Pierre KERFRIDEN, Karen L. SCRIVENER, Timon RABCZUK

《结构与土木工程前沿（英文）》 2011年第5卷第2期页码 180-193 doi: 10.1007/s11709-011-0107-9

摘要： We present a new method to model fracture of concrete based on energy minimisation. The concrete is considered on the mesoscale as composite consisting of cement paste, aggregates and micro pores. In this first step, the alkali-silica reaction is taken into account through damage mechanics though the process is more complex involving thermo-hygro-chemo-mechanical reaction. We use a non-local damage model that ensures the well-posedness of the boundary value problem (BVP). In contrast to existing methods, the interactions between degrees of freedom evolve with the damage evolutions. Numerical results are compared to analytical and experimental results and show good agreement.

关键词： Concrete damage prediction modelling energy minimisation ASR

HTML PDF 收藏

Self-motions of 3-RPS manipulators

HUSTY, Stéphane CARO, Philippe WENGERY

《机械工程前沿（英文）》 2013年第8卷第1期页码 62-69 doi: 10.1007/s11465-013-0366-3

摘要：

Recently a complete kinematic description of the 3-RPS parallel manipulator was obtained using algebraic constraint equations. It turned out that the workspace splits into two components describing two kinematically different operation modes. In this paper the algebraic description is used to give a complete analysis of all possible self-motions of this manipulator in both operation modes. Furthermore it is shown that a transition from one operation mode into the other in a self-motion is possible.

关键词： 3-RPS-manipulator singularity self-motion

HTML PDF 收藏

21世纪人类生活与生存的科技

蒋正华

《中国工程科学》 2002年第4卷第4期页码 1-11

摘要：

从管理学角度回顾了过去百年的世界历史，研究新世纪可能发生的进步，并探讨更好地建立世界和平与合作，实现共同发展的方案。

关键词： 21世纪科技进步人类生活与生存

HTML PDF 收藏

面向21世纪的中国林业遥感

赵宪文

《中国工程科学》 1999年第1卷第3期页码 16-21

摘要：

重点概述了近20年来林业遥感专家们为改进森林资源调查方法所作的诸多努力，如用卫星数据估计森林蓄积量、小块林地面积、以及森林郁闭度方法的研究、森林动态图的编制等。特别是上述方法在经过森林调查实际应用并进行效益分析后，提出的改进现行调查体系的建议。此外还提及了遥感用于评估、监测森林生态环境和森林灾害等方面取得的进展。对21世纪中国林业遥感前景进行了展望。作者认为下一个世纪中国林业遥感发展的主要方向是：包容各种新技术，形成新的技术体系，并与国际接轨；利用遥感的优势，研究森林的宏观状况与作用；与森林经营进一步结合。

关键词：林业遥感持续发展 21世纪

HTML PDF 收藏

Spray-coated SnO

Yaqin Wang, Lin Yang, Chunxiang Dall’Agnese, Gang Chen, Ai-Jun Li, Xiao-Feng Wang

《化学科学与工程前沿（英文）》 2021年第15卷第1期页码 180-186 doi: 10.1007/s11705-020-1917-x

摘要： SnO has been proven to be an effective electron transport layer (ETL) material for perovskite solar cells (PSCs) owing to its excellent electrical and optical properties. Here, we introduce a viable spray coating method for the preparation of SnO films. Then, we employ a SnO film prepared using the spray coating method as an ETL for PSCs. The PSC based on the spray-coated SnO ETL achieves a power conversion efficiency of 17.78%, which is comparable to that of PSCs based on conventional spin-coated SnO films. The large-area SnO films prepared by spray coating exhibit good repeatability for device performance. This study shows that SnO films prepared by spray coating can be applied as ETLs for stable and high-efficiency PSCs. Because the proposed method involves low material consumption, it enables the low-cost and large-scale production of PSCs.

关键词： spray coating SnO₂ film ETL PSCs

HTML PDF 收藏

Should medium-sized contractors still implement home-made information technologies on construction sites?

Conrad BOTON, Éric ST-PIERRE, Gabriel LEFEBVRE

《工程管理前沿（英文）》 2020年第7卷第1期页码 142-158 doi: 10.1007/s42524-019-0065-9

摘要： Despite the increasing dissemination of the Building Information Modeling (BIM) approach, many firms are still far from BIM and are only starting to adopt information technologies. We conducted an ethnographic action research with an industrial partner that implements information technologies on its construction sites, with a strong preference for home-made applications. Results show that the development of such applications faces difficulties and that multiple iterations and versions are necessary before achieving the expected goals because the required competencies are lacking among internal development teams. Moreover, initial needs evolve considerably throughout the application’s development and evaluation process. However, notwithstanding the difficulties encountered during the different application development phases, the industrial partner believes the decision to be worthwhile because of the desire to have internal control over the project data and the need to consider certain specificities related to business processes.

关键词： small- and medium-sized enterprises mobile computing mobile cloud computing information technology for construction construction site ethnographic action research

HTML PDF 收藏

21世纪计算与信息技术的挑战

Wm. A. Wulf

《中国工程科学》 2000年第2卷第10期页码 9-12

HTML PDF 收藏

加强“21世纪海上丝绸之路”战略支点建设研究

张大勇

《中国工程科学》 2016年第18卷第2期页码 105-110 doi: 10.15302/J-SSCAE-2016.02.013

摘要：

21世纪海上丝绸之路战略支点是指承载我国与沿线国家经贸、科技、文化合作功能的空间区域。近年来，我国与沿线国家在经贸合作园区、交通基础设施建设等方面开展了广泛合作，取得了良好效果，但也存在顶层设计不清晰、空间布局不合理、合作方式较单一、合作层次不丰富等问题。本研究以围绕“五通”加强战略支点建设为研究目标，在我国对外贸易数据分析为基础，利用层次分析法和德尔菲法，提出了战略支点建设的重点区域和建设模式，并从推进经贸合作区建设、加强科技文化交流、深化地区与行业合作等方面提出了政策建议。

关键词： 21世纪海上丝绸之路战略支点经贸合作科技合作

HTML PDF 收藏

标题作者时间类型操作

Ultrafast-laser-treated poly(3,4-ethylenedioxythiophene): poly(styrenesulfonate) electrodes with enhanced conductivity and transparency for semitransparent perovskite solar cells

期刊论文

Silk Roads for the 21st Century: Engineering Mega-Infrastructure for Development and Sustainability

Tony Marjoram

期刊论文

Digital manufacturing—the development direction of the manufacturing technology in the 21st century

XIONG You-lun, YIN Zhou-ping

期刊论文

Livestock breeding for the 21st century: the promise of the editing revolution

Chris PROUDFOOT, Gus MCFARLANE, Bruce WHITELAW, Simon LILLICO

期刊论文

Sustainable intensification of agriculture is key to feeding Africa in the 21st century

Shenggen FAN