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 1035

年份

2024 1

2023 97

2022 93

2021 100

2020 81

2019 66

2018 74

2017 47

2016 42

2015 66

2014 39

2013 36

2012 37

2011 45

2010 37

2009 34

2008 21

2007 18

2006 13

2005 11

展开︾

关键词

可再生能源 12

可持续发展 10

节能 10

能源 9

核能 7

电动汽车 6

能源安全 6

2035 4

新能源 4

氢能 4

碳中和 4

能源战略 4

能源结构 4

能源转型 4

能源革命 4

节能减排 4

节能环保 4

中长期 3

关键技术 3

展开︾

检索范围：

排序：展示方式：

Effect of harmonic distortion on electric energy meters of different metrological principles

Illia DIAHOVCHENKO, Vitalii VOLOKHIN, Victoria KUROCHKINA, Michal ŠPES, Michal KOSTEREC

《能源前沿（英文）》 2019年第13卷第2期页码 377-385 doi: 10.1007/s11708-018-0571-1

摘要： This paper deals with the errors of electric energy metering devices as a result of distortions in the shape of the curves of voltage and current load. It is shown and proved that the errors in energy measurements depend on the design and the algorithms used in electricity meters. There are three main types of metering devises having different principles: inductive (electro-mechanical), electronic static, and digital electronic (microprocessor). Each of these types has its measuring features. Some devices take into account all the harmonic distortions and the constant component which occur in the network while others measure the power and energy values of the fundamental harmonic only. Such traits lead to the discrepancies in the readings of commercial electric energy meters of different types. Hence, the violations in the measurement system unity occur, and a significant error can be observed in the balance of transmitted/consumed electric energy.

关键词： current distortion electric energy meter harmonics power quality

HTML PDF 收藏

Automotive revolution and carbon neutrality

《能源前沿（英文）》页码 693-703 doi: 10.1007/s11708-023-0890-8

摘要： The automotive industry is in the midst of a groundbreaking revolution, driven by the imperative to achieve intelligent driving and carbon neutrality. A crucial aspect of this transformation is the transition to electric vehicles (EVs), which necessitates widespread changes throughout the entire automotive ecosystem. This paper examines the challenges and opportunities of this transition, including automotive electrification, intelligence-connected transportation system, and the potential for new technologies such as hydrogen fuel cells. Meanwhile, it discusses the key technologies and progress of the hydrogen energy industry chain in the upstream hydrogen production, midstream hydrogen storage and transportation, downstream hydrogen station construction and hydrogen fuel cells in turn. Finally, it proposes the directions for future layout, providing guidance for future development.

关键词： automotive revolution electric vehicles (EVs) hydrogen energy fuel cell

HTML PDF 收藏

Nonlinear sealing force of a seawater balance valve used in an 11000-meter manned submersible

《机械工程前沿（英文）》 2023年第18卷第1期 doi: 10.1007/s11465-022-0726-y

摘要： Balance valve is a core component of the 11000-meter manned submersible “struggle,” and its sealing performance is crucial and challenging when the maximum pressure difference is 118 MPa. The increasing sealing force improves the sealing performance and increases the system’s energy consumption at the same time. A hybrid analytical–numerical–experimental (ANE) model is proposed to obtain the minimum sealing force, ensuring no leakage at the valve port and reducing energy consumption as much as possible. The effects of roundness error, environmental pressure, and materials on the minimum sealing force are considered in the ANE model. The basic form of minimum sealing force equations is established, and the remaining unknown coefficients of the equations are obtained by the finite element method (FEM). The accuracy of the equation is evaluated by comparing the independent FEM data to the equation data. Results of the comparison show good agreement, and the difference between the independent FEM data and equation data is within 3% when the environmental pressure is 0–118 MPa. Finally, the minimum sealing force equation is applied in a balance valve to be experimented using a deep-sea simulation device. The balance valve designed through the minimum sealing force equation is leak-free in the experiment. Thus, the minimum sealing force equation is suitable for the ultrahigh pressure balance valve and has guiding significance for evaluating the sealing performance of ultrahigh pressure balance valves.

关键词： seawater balance valve sealing performance hybrid ANE model FEM minimum sealing force equation

HTML PDF 收藏

Biofuels and food security

Dmitry S. STREBKOV

《农业科学与工程前沿（英文）》 2015年第2卷第1期页码 1-12 doi: 10.15302/J-FASE-2015052

摘要： The major source of energy comes from fossil fuels. The current situation in the field of fuel and energy is becoming more problematic as world population continues to grow because of the limitation of fossil fuels reserve and its pressure on environment. This review aims to find economic, reliable, renewable and non-polluting energy sources to reduce high energy tariffs in Russian Federation. Biofuel is fuel derived directly from plants, or indirectly from agricultural, commercial, domestic, and/or industrial wastes. Other alternative energy sources including solar energy and electric power generation are also discussed. Over 100 Mt of biomass available for energy purposes is produced every year in Russian. One of the downsides of biomass energy is its potential threatens to food security and forage industries. An innovative approach proved that multicomponent fuel (80% diesel oil content for motor and 64% for in stove fuel) can remarkably reduce the costs. This paper proposed that the most promising energy model for future is based on direct solar energy conversion and transcontinental terawatt power transmission with the use of resonant wave-guide technology.

关键词： fossil fuels biofuels food security electric power solar energy

HTML PDF 收藏

电动汽车关键技术发展综述

王丹,续丹,曹秉刚

《中国工程科学》 2013年第15卷第1期页码 68-72

摘要：

介绍了电动汽车关键技术发展状况，分别从电动汽车用驱动电机、动力电池及电池管理系统、电机控制及能量回收系统等方面进行了概述，并对电动汽车技术发展趋势进行了展望。在政府的支持下，随着电机、电池及电控等电动汽车关键技术逐步完善，电动汽车必将成为“零污染”的清洁交通工具。

关键词：电动汽车电机电池能源管理系统能量回收系统

HTML PDF 收藏

Decoupling optimization of integrated energy system based on energy quality character

Shixi MA, Shengnan SUN, Hang WU, Dengji ZHOU, Huisheng ZHANG, Shilie WENG

《能源前沿（英文）》 2018年第12卷第4期页码 540-549 doi: 10.1007/s11708-018-0597-4

摘要：

Connections among multi-energy systems become increasingly closer with the extensive application of various energy equipment such as gas-fired power plants and electricity-driven gas compressor. Therefore, the integrated energy system has attracted much attention. This paper establishes a gas-electricity joint operation model, proposes a system evaluation index based on the energy quality character after considering the grade difference of the energy loss of the subsystem, and finds an optimal scheduling method for integrated energy systems. Besides, according to the typical load characteristics of commercial and residential users, the optimal scheduling analysis is applied to the integrated energy system composed of an IEEE 39 nodes power system and a 10 nodes natural gas system. The results prove the feasibility and effectiveness of the proposed method.

关键词： integrated energy system energy quality character optimization electric power system natural gas system

HTML PDF 收藏

构建以新能源为主体的新型电力系统框架研究

舒印彪,陈国平,贺静波,张放

《中国工程科学》 2021年第23卷第6期页码 61-69 doi: 10.15302/J-SSCAE-2021.06.003

摘要：

构建以新能源为主体的新型电力系统，既是我国电力系统转型升级的重要方向，也是实现碳达峰、碳中和目标的关键途径。本文分析了电力系统转型带来的变化、问题及挑战，阐述了新型电力系统的内涵、构建原则与思路；根据电力系统发展的技术特征、新能源接入规模，合理划分新型电力系统的发展阶段并针对性提出各阶段的发展建议。研究认为，新型电力系统以新能源为电能供给主体，可满足不断增长的清洁用电需求，兼具高度的安全性、开放性、适应性；相关系统构建是一项系统性工程，应遵循电力系统的技术演进规律与特征，充分利用成熟技术、存量系统并深入挖掘潜力，同步着力研发新兴技术，积极稳妥并循序渐进实施重大转型。

关键词：新型电力系统碳达峰碳中和新能源电力转型

HTML PDF 收藏

Erratum to: Meter-scale variation within a single transect demands attention to taxon accumulation curves

《环境科学与工程前沿（英文）》 2022年第16卷第6期 doi: 10.1007/s11783-022-1560-5

HTML PDF 收藏

板形计法的定义及实验应用

张进之,段春华,朱健勤

《中国工程科学》 2001年第3卷第12期页码 47-51

摘要：

板形测控数学模型、解析板形刚度理论和板形板厚协调规律的综合称为板形计法。采用两种实验方式验证了板形计法的正确性和实用性，其一是通过轧铝板实验，计算轧机板形刚度和轧件板形刚度，由实测铝板凸度验证板形刚度方程；其二是由CVC板形控制热连轧机实测数据，用离线计算自适应系数的方法验证板形测控数学模型。

关键词：板形计法板形刚度方程测控数学模型后计算自适应

HTML PDF 收藏

Techno-economic analysis of the adoption of electric vehicles

Donald KENNEDY, Simon P. PHILBIN

《工程管理前沿（英文）》 2019年第6卷第4期页码 538-550 doi: 10.1007/s42524-019-0048-x

摘要： Significant advances in battery technology are creating a viable marketspace for battery powered passenger vehicles. Climate change and concerns over reliable supplies of hydrocarbons are aiding in the focus on electric vehicles. Consumers can be influenced by marketing and emotion resulting in behaviors that may not be in line with their stated objectives. Although sales of electric vehicles are accelerating, it may not be clear that purchasing an electric vehicle is advantageous from an economic or environmental perspective. A techno- economic analysis of electric vehicles comparing them against hybrids, gasoline and diesel vehicles is presented. The results show that the complexity of electrical power supply, infrastructure requirements and full life cycle concerns show that electric vehicles have a place in the future but that ongoing improvements will be required for them to be clearly the best choice for a given situation.

关键词： BEV battery powered electric vehicle environmental impact of electric vehicles techno-economic analysis gasoline versus electric powered cars diesel versus electric cars consumer behaviour

HTML PDF 收藏

Stem cell niches and endogenous electric fields in tissue repair

null

《医学前沿（英文）》 2011年第5卷第1期页码 40-44 doi: 10.1007/s11684-011-0108-z

摘要：

Adult stem cells are responsible for homeostasis and repair of many tissues. Endogenous adult stem cells reside in certain regions of organs, known as the stem cell niche, which is recognized to have an important role in regulating tissue maintenance and repair. In wound healing and tissue repair, stem cells are mobilized and recruited to the site of wound, and participate in the repair process. Many regulatory factors are involved in the stem cell-based repair process, including stem cell niches and endogenous wound electric fields, which are present at wound tissues and proved to be important in guiding wound healing. Here we briefly review the role of stem cell niches and endogenous electric fields in tissue repair, and hypothesize that endogenous electric fields become part of stem cell niche in the wound site.

关键词： stem cell stem cell niche electric field tissue repair

HTML PDF 收藏

我国电力中长期发展战略研究

杨奇逊,蒋宜国,丛琳,姚愉芳,白建华

《中国工程科学》 2011年第13卷第6期页码 57-64

摘要：

在预测中长期我国用电量需求的基础上，通过分析燃煤发电、水电、核电、非水可再生能源发电、天然气发电的供应能力，阐明了中长期我国电源发展的原则和目标，提出了中长期我国电网发展模式，并指出要以智能配用电、智能调度、大规模储能、超导电力、分布式供电等新型电力技术为支撑实现我国中长期电力发展战略。

关键词：能源发展战略电力发展战略中长期

HTML PDF 收藏

水下多相流量计在深水油气田开发工程中的应用研究

刘太元,郭宏,郑利军

《中国工程科学》 2012年第14卷第11期页码 69-74

摘要：

科学技术的不断发展，加速了人们对海洋油气勘探向更深的领域迈进。为了实时监测油井井流的变化，以便更好地优化对油藏的开发，水下多相流量计得到了越来越多的应用。概述了目前常见的水下多相流量计的基本测量原理，研究了多相流量计在深水油气田开发应用的影响因素，包括量程、安装位置、通讯结构等，给出了各种不同方案的可能性，对多相流量计在深水油气田开发工程中的应用具有一定的指导意义。

关键词：深水水下多相流量计流动安全油藏优化油气田开发

HTML PDF 收藏

超导磁储能系统在舰船电力系统中的应用前景及其关键课题

戴陶珍,范则阳,李敬东,唐跃进,程时杰

《中国工程科学》 2002年第4卷第6期页码 16-19

摘要：

现代舰船电力系统容量急剧增大，全电力舰船的实现、敏感负荷和新概念武器的引入使舰船电力系统面临着一系列挑战。介绍了超导磁储能系统（SMES）作为一种新型储能设备的应用研究进展，分析了SMES在舰船电力系统中的潜在应用，最后提出了舰船电力系统中应用SMES的关键课题。

关键词：舰船电力系统超导磁储能系统（SMES）超导应用

HTML PDF 收藏

Intelligent algorithm for optimal meter placement and bus voltage estimation in ring main distribution

L. RAMESH, N. CHAKRABORTY, S. P. CHOWDHURY

《能源前沿（英文）》 2012年第6卷第1期页码 47-56 doi: 10.1007/s11708-011-0159-5

摘要： The advancement in power distribution system poses a great challenge to power engineering researchers on how to best monitor and estimate the state of the distribution network. This paper is executed in two stage processes. The first stage is to identify the optimal location for installation of monitoring instrument with minimal investment cost. The second stage is to estimate the bus voltage magnitude, where real time measurement is conducted and measured through identified meter location which is more essential for decision making in distribution supervisory control and data acquisition system (DSCADA). The hybrid intelligent technique is applied to execute the above two algorithms. The algorithms are tested with institute of electrical and electronics engineers (IEEE) and Tamil Nadu electricity board (TNEB) benchmark systems. The simulated results proves that the swarm tuned artificial neural network (ANN) estimator is best suited for accurate estimation of voltage with different noise levels.

关键词： artificial intelligence power distribution control state estimation