资源类型

期刊论文 647

会议视频 28

年份

2023 82

2022 70

2021 74

2020 54

2019 31

2018 30

2017 15

2016 30

2015 30

2014 20

2013 25

2012 21

2011 28

2010 22

2009 18

2008 26

2007 28

2006 17

2005 5

2004 4

展开 ︾

关键词

机理 9

能源 5

碳中和 3

2021全球工程前沿 2

DX桩 2

Maradbcm算法 2

中药 2

产品设计 2

人工智能 2

代谢组学 2

作用机制 2

全寿命周期 2

原子力显微镜 2

可持续发展 2

基本范式 2

工程前沿 2

工程管理 2

整体穿刺 2

新一代智能制造 2

展开 ︾

检索范围:

排序: 展示方式:

An overview of the environmental finance policies in China: retrofitting an integrated mechanism for

LI Wei,HU Mengze

《环境科学与工程前沿(英文)》 2014年 第8卷 第3期   页码 316-328 doi: 10.1007/s11783-014-0625-5

摘要: Considering the significant roles of the policies in developing environmental finance, an overview is conducted on the environmental finance policies (EFPs) in China. This paper analyzed the definition, scope, evolution and main instruments of EFPs. The implementation progress of financial activities on each instrument are investigated respectively. Then the experiences learned from and failures discovered in the development of the EFPs are discussed well recommendations for further improvement of the EFPs and their implementation are provided. Our study found that the EFPs have been established in China after a four-phase evolution since the early 1980s. The policies have played a critical role in leading to a rapid development in environmental finance by involving more financial instruments to accomplish the objective-led environmental plans. Driven by the policies, the new green credit (GC), green security (GS), and green insurance (GI) instruments have been phased in as supplements to the conventional command and control approaches to improve the environmental governance of financial activities and pollution sources. However, the market mechanism of financial institution is limited due to their defensive and incapable performance on implementation some of EFP instruments. To further strengthen the effectiveness of EFPs in facilitating environmental management, recommendations are made mainly on the aspects including developing more specific policy guidelines, enhancing information sharing and disclosure, providing sufficient economic incentives, establishing environmental liabilities with financial activities, and involving issues related to climate change, and biodiversity and ecosystem service.

关键词: environmental finance policy     integrated mechanism     phased evolution     implementation progress     financial institution     environmental management    

Integrated slipper retainer mechanism to eliminate slipper wear in high-speed axial piston pumps

《机械工程前沿(英文)》 doi: 10.1007/s11465-021-0657-z

摘要: The power density of axial piston pumps can greatly benefit from increasing the speed level. However, traditional slippers in axial piston pumps are exposed to continuous sliding on the swash plate, suffering from serious wear at high rotational speeds. Therefore, this paper presents a new integrated slipper retainer mechanism for high-speed axial piston pumps, which can avoid direct contact between the slippers and the swash plate and thereby eliminate slipper wear under severe operating conditions. A lubrication model was developed for this specific slipper retainer mechanism, and experiments were carried out on a pump prototype operating at high rotational speed up to 10000 r/min. Experimental results qualitatively validated the theoretical model and confirmed the effectiveness of the new slipper design.

关键词: axial piston pump     high speed     slipper wear     slipper design     retainer     lubrication model    

Characteristics and removal mechanism of the precursors of N-chloro-2,2-dichloroacetamide in a drinking

《环境科学与工程前沿(英文)》 2021年 第15卷 第5期 doi: 10.1007/s11783-020-1338-6

摘要:

• N-Cl-DCAM, an emerging N-DBP in drinking water was investigated.

关键词: N-chloro-2     2-dichloroacetamide     Liquid chromatography with tandem mass spectrometry     Precursors     Removal efficiency     Ozonation integrated with biological activated carbon    

正交叠层机织布整体穿刺工艺的纤维弯曲伸长机理

朱建勋,何建敏,王海燕

《中国工程科学》 2003年 第5卷 第5期   页码 59-62

摘要:

分析了正交叠层机织布整体穿刺工艺机织布与钢针的相互作用,提出并建立了纤维的弯曲伸长及伸长断裂模式,讨论了影响纤维弯曲伸长的结构参数。通过理论分析和试验结果说明,绕针弯曲伸长断裂是Z向钢针直径和Z向距比值X的函数,为减少整体穿刺的纤维伸长断裂应选取较小的X比值。

关键词: 整体穿刺     纤维     弯曲伸长     结构参数     伸长断裂    

Practice and principle of traditional Chinese medicine for the prevention and treatment of COVID-19

《医学前沿(英文)》 doi: 10.1007/s11684-023-1040-8

摘要: Traditional Chinese medicine (TCM) has played an important role in the prevention and treatment of coronavirus disease 2019 (COVID-19) epidemic in China. The integration of Chinese and Western medicine is an important feature of Chinese COVID-19 prevention and treatment. According to a series of evidence-based studies, TCM can reduce the infection rate of severe acute respiratory syndrome coronavirus 2 in high-risk groups. For patients with mild and moderate forms of COVID-19, TCM can relieve the related signs and symptoms, shorten the period of nucleic-acid negative conversion, and reduce conversion rate to the severe form of the disease. For COVID-19 patients with severe and critical illnesses, TCM can improve inflammatory indicators and blood oxygen saturation, shorten the hospital stay, and reduce the mortality rate. During recovery, TCM can improve patients’ symptoms, promote organ function recovery, boost the quality of patients’ life, and reduce the nucleic-acid repositive conversion rate. A series of mechanism research studies revealed that capability of TCM to treat COVID-19 through antiviral and anti-inflammatory effects, immune regulation, and protection of organ function via a multicomponent, multitarget, and multipathway approach.

关键词: traditional Chinese medicine     COVID-19     SARS-CoV-2     clinical evidence-based study     mechanism     integrated traditional Chinese and Western medicine    

Energy saving design of the machining unit of hobbing machine tool with integrated optimization

《机械工程前沿(英文)》 2022年 第17卷 第3期 doi: 10.1007/s11465-022-0694-2

摘要: The machining unit of hobbing machine tool accounts for a large portion of the energy consumption during the operating phase. The optimization design is a practical means of energy saving and can reduce energy consumption essentially. However, this issue has rarely been discussed in depth in previous research. A comprehensive function of energy consumption of the machining unit is built to address this problem. Surrogate models are established by using effective fitting methods. An integrated optimization model for reducing tool displacement and energy consumption is developed on the basis of the energy consumption function and surrogate models, and the parameters of the motor and structure are considered simultaneously. Results show that the energy consumption and tool displacement of the machining unit are reduced, indicating that energy saving is achieved and the machining accuracy is guaranteed. The influence of optimization variables on the objectives is analyzed to inform the design.

关键词: energy saving design     energy consumption     machining unit     integrated optimization     machine tool    

Applying an Integrated Systems Perspective to the Management of Engineering Projects

Simon P. Philbin

《工程管理前沿(英文)》 2015年 第2卷 第1期   页码 19-30 doi: 10.15302/J-FEM-2015004

摘要: Engineering projects can be subject to significant complexity, which may result in a number of issues and challenges that need to be addressed throughout the project life-cycle. Traditionally projects have been viewed according to the so called “iron triangle,” i. e., achievement of project milestones according to schedule, cost and quality targets. While these targets are fundamentally important to the performance of engineering projects, it is possible to view projects on a systemic level in order to allow an adequate focus on all the underpinning factors that have the potential to influence the performance of projects. Consequently, a management framework has been developed that is based on an integrated systems perspective of engineering projects, where the performance of projects is a function of six contributing sub-systems that are: process, technology, resources, knowledge, culture and impact.

关键词: integrated systems perspective     engineering projects     management    

A novel decoupling approach to an integrated optical-fiber proximity sensor for robots

LIU Guixiong, LI Xiani

《机械工程前沿(英文)》 2007年 第2卷 第2期   页码 164-167 doi: 10.1007/s11465-007-0027-5

摘要: The structure and the working principle of a self-compensational integrated optical-fiber proximity sensor that detects distance and orientation are introduced in this paper. The corresponding decoupling approach to the sensor is presented on the basis of multiscale characteristics. The decoupling process can be divided into two parts: classifying the information on the basis of the multiscale degree and solving the coupling equation via the computational approximation methods with different precisions. Finally, the principle, the physical meaning, and the implementation process of the approach are discussed. They indicate that the proposed approach is real-time and accurate, and can be applied to other similar circumstances.

关键词: multiscale     different     self-compensational integrated     information     implementation    

Optimal operation of integrated energy system including power thermal and gas subsystems

《能源前沿(英文)》 2022年 第16卷 第1期   页码 105-120 doi: 10.1007/s11708-022-0814-z

摘要: As a form of hybrid multi-energy systems, the integrated energy system contains different forms of energy such as power, thermal, and gas which meet the load of various energy forms. Focusing mainly on model building and optimal operation of the integrated energy system, in this paper, the dist-flow method is applied to quickly calculate the power flow and the gas system model is built by the analogy of the power system model. In addition, the piecewise linearization method is applied to solve the quadratic Weymouth gas flow equation, and the alternating direction method of multipliers (ADMM) method is applied to narrow the optimal results of each subsystem at the coupling point. The entire system reaches its optimal operation through multiple iterations. The power-thermal-gas integrated energy system used in the case study includes an IEEE-33 bus power system, a Belgian 20 node natural gas system, and a six node thermal system. Simulation-based calculations and comparison of the results under different scenarios prove that the power-thermal-gas integrated energy system enhances the flexibility and stability of the system as well as reducing system operating costs to some extent.

关键词: integrated energy system     power-to-gas     dist-flow     piecewise linearization     alternating direction method of multipliers (ADMM)    

Integrated energy in Germany–A critical look at the development and state of integrated energies in Germany

Saman AMANPOUR, Daniel HUCK, Mark KUPRAT, Harald SCHWARZ

《能源前沿(英文)》 2018年 第12卷 第4期   页码 493-500 doi: 10.1007/s11708-018-0570-2

摘要: In the face of global warming and a scarcity of resources, future energy systems are urged to undergo a major and radical transformation. The recognition of the need to embrace renewable energy technologies and to move toward decarbonization has led to significant changes in the German energy generation, consumption and infrastructure. Ambitious German national plans to decrease carbon dioxide emissions on one side, and the unpredictable and volatile nature of renewable energy sources on the other side have elevated the importance of integrated energies in recent years. The deployment of integrated technologies as a solution to interlink various infrastructures creates opportunities for increasing the reliability of energy systems, minimizing environmental impacts and maximizing the share of renewable resources. This paper discusses the role of integrated energy systems in supporting of sustainable solutions for future energy transitions. Moreover, the reinforcement of this movement with the help of different technologies will be discussed and the development of integrated energy systems in Germany will be reviewed.

关键词: integrated energy     renewable energies     energy transition     power-to-gas     power-to-heat     power-to-mobility     energy storage    

Development of an integrated structural health monitoring system for bridge structures in operational

Xinqun ZHU, Hong HAO

《结构与土木工程前沿(英文)》 2012年 第6卷 第3期   页码 321-333 doi: 10.1007/s11709-012-0161-y

摘要: This paper presents an overview of development of an integrated structural health monitoring system. The integrated system includes vibration and guided-wave based structural health monitoring. It integrates the real-time heterogeneous sensor data acquiring system, data analysis and interpretation, physical-based numerical simulation of complex structural system under operational conditions and structural evaluation. The study is mainly focused on developing: integrated sensor technology, integrated structural damage identification with operational loads monitoring, and integrated structural evaluation with results from system identification. Numerical simulation and its implementation in laboratory show that the system is effective and reliable to detect local damage and global conditions of bridge structures.

关键词: integrated structural health monitoring     operational conditions     vibration and guided wave    

Elucidate long-term changes of ozone in Shanghai based on an integrated machine learning method

《环境科学与工程前沿(英文)》 2023年 第17卷 第11期 doi: 10.1007/s11783-023-1738-5

摘要:

● A novel integrated machine learning method to analyze O3 changes is proposed.

关键词: Ozone     Integrated method     Machine learning    

Exploration and Practice in Systems Engineering Management of Large Coal-based Integrated Energy Projects

Wen Ling

《工程管理前沿(英文)》 2015年 第2卷 第2期   页码 173-177 doi: 10.15302/J-FEM-2015029

摘要: With an analysis of current development of China’s coal industry, this paper, in the perspectives of concept innovation, technological innovation and management innovation, introduces the exploration and engineering practice by Shenhua Group in coordination with coal and the environment, co-development of coal and the associated resources as well as clean and efficient utilization of coal. Based on systems engineering of Shenhua’s coal-based integrated energy projects, the paper also presents practice and experience in technological and management innovation.

关键词: coal-based     integrated energy     systems engineering     exploration     practice    

End-of-pipe or process-integrated: evidence from LMDI decomposition of China’s SO

Pingdan ZHANG

《环境科学与工程前沿(英文)》 2013年 第7卷 第6期   页码 867-874 doi: 10.1007/s11783-013-0541-0

摘要: In this study, reduction in sulfur dioxide (SO ) emission is decomposed into three parts: source prevention, process control and end-of-pipe treatment, using the Logarithmic Mean Divisia Index method (LMDI). Source prevention and process control are defined as process-integrated treatment. It is found that from 2001 to 2010 the reduction of SO emission density in China was mainly contributed by end-of-pipe treatment. From the 10th Five Year Plan (FYP) period (2001–2005) to the 11th FYP period (2006–2010), the Chinese government has attempted to enhance process-integrated treatment. However, given its initial effort, the effect is limited compared with that of the end-of-pipe treatment. The effectiveness of environmental regulation and technology in the reduction of SO density in 30 provinces (municipality/autonomous regions) from 2001 to 2010 is also investigated. This implies that environmental regulation and technology promote process control and end-of-pipe treatment significantly, but does not influence source prevention. Furthermore, environmental technology will only take effect under the circumstances of stringent environmental regulation. Therefore, to fulfill the whole process treatment, environmental regulation should be strengthened and environmental technology upgraded at the same time.

关键词: end-of-pipe     process-integrated     Logarithmic Mean Divisia Index method (LMDI)     environmental regulation     environmental technology    

microplastics in a coastal wastewater treatment plant: Microfibers could partially break through the integrated

《环境科学与工程前沿(英文)》 2022年 第16卷 第7期 doi: 10.1007/s11783-021-1517-0

摘要:

• Fate of microplastics in integrated membrane system for water reuse was investigated.

关键词: Water reclamation     Integrated membrane system     Microplastics     Removal     Coastal zone    

标题 作者 时间 类型 操作

An overview of the environmental finance policies in China: retrofitting an integrated mechanism for

LI Wei,HU Mengze

期刊论文

Integrated slipper retainer mechanism to eliminate slipper wear in high-speed axial piston pumps

期刊论文

Characteristics and removal mechanism of the precursors of N-chloro-2,2-dichloroacetamide in a drinking

期刊论文

正交叠层机织布整体穿刺工艺的纤维弯曲伸长机理

朱建勋,何建敏,王海燕

期刊论文

Practice and principle of traditional Chinese medicine for the prevention and treatment of COVID-19

期刊论文

Energy saving design of the machining unit of hobbing machine tool with integrated optimization

期刊论文

Applying an Integrated Systems Perspective to the Management of Engineering Projects

Simon P. Philbin

期刊论文

A novel decoupling approach to an integrated optical-fiber proximity sensor for robots

LIU Guixiong, LI Xiani

期刊论文

Optimal operation of integrated energy system including power thermal and gas subsystems

期刊论文

Integrated energy in Germany–A critical look at the development and state of integrated energies in Germany

Saman AMANPOUR, Daniel HUCK, Mark KUPRAT, Harald SCHWARZ

期刊论文

Development of an integrated structural health monitoring system for bridge structures in operational

Xinqun ZHU, Hong HAO

期刊论文

Elucidate long-term changes of ozone in Shanghai based on an integrated machine learning method

期刊论文

Exploration and Practice in Systems Engineering Management of Large Coal-based Integrated Energy Projects

Wen Ling

期刊论文

End-of-pipe or process-integrated: evidence from LMDI decomposition of China’s SO

Pingdan ZHANG

期刊论文

microplastics in a coastal wastewater treatment plant: Microfibers could partially break through the integrated

期刊论文