期刊文献+
共找到33篇文章
< 1 2 >
每页显示 20 50 100
Hydraulic operating mechanisms for high voltage circuit breakers: Progress evolution and future trends 被引量:10
1
作者 LIU Wei XU Bing +2 位作者 YANG HuaYong ZHAO HongFei WU JunHui 《Science China(Technological Sciences)》 SCIE EI CAS 2011年第1期116-125,共10页
High voltage circuit breakers are the most important protection and control apparatus in power system. As a core part of circuit breakers, the operating mechanisms have a trend to be hydraulic-style in high voltage po... High voltage circuit breakers are the most important protection and control apparatus in power system. As a core part of circuit breakers, the operating mechanisms have a trend to be hydraulic-style in high voltage power grid. Compared with other hydranlic systems, the hydraulic operating mechanisms have the characteristics of high hydraulic pressure, high speed, high power and long-term waiting etc., and it is because of the characteristics that the hydraulic operating mechanisms become dif- ficult to be developed and have been arousing significant study interest from more and more researchers as well as their promising applications. Therefore, it is significant to summarize the hydraulic operating mechanisms on their development, characteristics, and key technologies etc. In this review, the evolution process and recent studies of hydraulic operating mechanisms at home and abroad are viewed. The review then focuses on the characteristics and key technologies of hydraulic operating mechanisms, especially on time and velocity characteristics, high-speed cylinder cushioning, fast response and great flow rate control valve, temperature compensation, system monitoring and fault diagnosis, intelligent operation, energy storage module, etc. In the end, the future trends of this field are presented. 展开更多
关键词 hydraulic operating mechanism high voltage circuit breaker control valve opening and closing motion cushioning
原文传递
Mechanisms of Extending Operation Region in the HL-1M Tokamak
2
作者 彭利林 邓柏权 +1 位作者 严建成 袁宝山 《Plasma Science and Technology》 SCIE EI CAS CSCD 2001年第1期597-605,共9页
Stable operating region in the HL-1M tokamak has been extended by means of wall conditioning, core fuelling and current control techniques. The mechanisms of the extension are analyzed in this paper. Lithiumization di... Stable operating region in the HL-1M tokamak has been extended by means of wall conditioning, core fuelling and current control techniques. The mechanisms of the extension are analyzed in this paper. Lithiumization diminishes the impurities and hydrogen recycling to the lowest level. After lithiumization a high density up to 7×1019 m-3 was obtained easily by strong gas puffing with ordinary ohmic discharge alone. More attractively we found that metal Li-coating exhibited the effects of wall stabilization. The low qα limit with higher density was extended by a factor of 1.5-2 in comparison with that for boronization, and 1.2 for siliconization. Siliconization not only extended stable operating region significantly by itself, but also provided a good target plasma for other experiments of raising density limit. Core fuelling schemes are favourable especially for siliconized wall with a higher level of medium-Z impurity (Z = 14). After siliconization the maximum density near to 1020 m-3 was achieved by a combination of supersonic molecule beam injection and multipellet injection. The new defined slope of Hugill limit illustrating more clearly the situation under low qα and high ne discharges was created to indicate the new region extended by combining IP ramp-up with core fuelling. The slope with a large Murakami coefficient increased by a factor of 50-60 %. 展开更多
关键词 mechanisms of Extending Operation Region in the HL-1M Tokamak HL
下载PDF
The Current State of Guangzhou Standardization and a Study of its Mechanisms of Operation
3
作者 Cai Ruoheng Hong Liang Yuan Ling 《China Standardization》 2009年第2期33-36,共4页
By analyzing the situations,characteristics and majorproblems affecting Guangzhou's process of standardization,thispaper proposes a new operation mechanism.It is to be built withthe Guangzhou Standardization Leadi... By analyzing the situations,characteristics and majorproblems affecting Guangzhou's process of standardization,thispaper proposes a new operation mechanism.It is to be built withthe Guangzhou Standardization Leading Group at its core.TheGuangzhou Institute of Standardization should supply technical support,trade associations should act as a bridge between manufacturersand the government to active participation by the majority of enterprisesand society generally. 展开更多
关键词 GUANGZHOU STANDARDIZATION operation mechanism
下载PDF
Stability evaluation method of large cross-section tunnel considering modification of thickness-span ratio in mechanized operation
4
作者 Junru Zhang Yumeng Liu Bo Yan 《Railway Sciences》 2023年第2期197-210,共14页
Purpose-This study aims to research the large cross-section tunnel stability evaluation method corrected after considering the thickness-span ratio.Design/methodology/approach-First,taking the Liuyuan Tunnel of Huangg... Purpose-This study aims to research the large cross-section tunnel stability evaluation method corrected after considering the thickness-span ratio.Design/methodology/approach-First,taking the Liuyuan Tunnel of Huanggang-Huangmei High-Speed Railway as an example and taking deflection of the third principal stress of the surrounding rock at a vault after tunnel excavation as the criterion,the critical buried depth of the large section tunnel was determined.Then,the strength reduction method was employed to calculate the tunnel safety factor under different rock classes and thickness-span ratios,and mathematical statistics was conducted to identify the relationships of the tunnel safety factor with the thickness-span ratio and the basic quality(BQ)index of the rock for different rock classes.Finally,the influences of thickness-span ratio,groundwater,initial stress of rock and structural attitude factors were considered to obtain the corrected BQ,based on which the stability of a large cross-section tunnel with a depth of more than 100 m during mechanized operation was analyzed.This evaluation method was then applied to Liuyuan Tunnel and Cimushan No.2 Tunnel of Chongqing Urban Expressway for verification.Findings-This study shows that under different rock classes,the tunnel safety factor is a strict power function of the thickness-span ratio,while a linear function of the BQ to some extent.It is more suitable to use the corrected BQ as a quantitative index to evaluate tunnel stability according to the actual conditions of the site.Originality/value-The existing industry standards do not consider the influence of buried depth and span in the evaluation of tunnel stability.The stability evaluation method of large section tunnel considering the correction of overburden span ratio proposed in this paper achieves higher accuracy for the stability evaluation of surrounding rock in a full or large-section mechanized excavation of double line high-speed railway tunnels. 展开更多
关键词 Large cross-section tunnel Mechanized operation Tunnel stability Thickness-span ratio Basic quality index of rock Safety factor DEPTH SPAN
下载PDF
Research on Enterprise Operation Mechanism Innovation Under Economic Transformation
5
作者 Qingzhi Li 《Proceedings of Business and Economic Studies》 2023年第2期39-44,共6页
With the rapid development of the market economy, complex changes have occurred in the market environment, and the competition among enterprises has become extremely fierce. The transformation of the structure of the ... With the rapid development of the market economy, complex changes have occurred in the market environment, and the competition among enterprises has become extremely fierce. The transformation of the structure of the market economy has prompted enterprises to seek for new developments and innovations. Under the background of the new economy, enterprises must begin from the perspective of internal management and internal strategic development to ensure quality enterprise operation mechanism innovation. This would help direct enterprise operation and development as well as demonstrate the value of enterprise internal management. In this way, enterprises will be able to array their overall competitiveness. This paper comprises a detailed analysis of the connotation and innovation of enterprise operation mechanism under the economic transformation, with the purpose of investigating the innovation strategy of enterprise operation mechanism under the economic transformation. 展开更多
关键词 Economic transformation ENTERPRISE Operation mechanism Enterprise development Development and innovation
下载PDF
Exploration of the Inner Laws of Urbanization Economic Operation and Application Analysis
6
作者 Tingting Yu 《Open Journal of Applied Sciences》 2023年第12期2291-2305,共15页
Exploring the inner law of the economic operation of urbanization can understand the regulation mechanism of the optimal distribution of urban resource allocation. In this regard, we propose to explore and analyze the... Exploring the inner law of the economic operation of urbanization can understand the regulation mechanism of the optimal distribution of urban resource allocation. In this regard, we propose to explore and analyze the inner law of urbanization economic operation and its application. The study found that the urbanization economy originated from the urban agglomeration effect, which includes the agglomeration economic operation mechanism and spillover effect operation mechanism, based on which three kinds of inner laws of urbanization economic operation are explored, combined with the economic operation law, the non-equilibrium state of the declining cities are regulated and applied, and the results show that the analysis of the inner laws of urbanization economic operation has a direct significance in guiding the real economic process. 展开更多
关键词 ECONOMY URBANIZATION LAWS Operational mechanisms
下载PDF
The Operation Mechanism of Agricultural Products Supply Chain and Profit Allocation Model in the Context of Asymmetric Information 被引量:1
7
作者 齐天真 孙蕊 郭超坤 《Agricultural Science & Technology》 CAS 2016年第1期197-200,233,共5页
The research performed analysis on causes of asymmetric information of agricultural product supply chain and made conclusion on operation mechanism and characteristics of supply chain based on asymmetric information. ... The research performed analysis on causes of asymmetric information of agricultural product supply chain and made conclusion on operation mechanism and characteristics of supply chain based on asymmetric information. Finally, the research detailed profit sharing of agricultural product supply chain in the context of asymmetric information and proposed suggestions, providing references of pricing and profit sharing of supply chains of agricultural products. 展开更多
关键词 Information asymmetry The supply chain of agricultural products The operation mechanism Profit allocation model
下载PDF
The configuration mechanism of English and Chinese double-object construction for verbs of creation
8
作者 许宁云 韩丹 《Sino-US English Teaching》 2010年第5期39-46,共8页
Verbs of creation in English and Chinese demonstrate asymmetries in its projection to double-object construction. But underling the projection process there is a uniform operation mechanism, namely that the configurat... Verbs of creation in English and Chinese demonstrate asymmetries in its projection to double-object construction. But underling the projection process there is a uniform operation mechanism, namely that the configuration is affected by the interaction between the Meaning Assignment Principle (MAP), the Distance Principle of Iconicity (DPI) and the Lexical Feature Constraints (LFC), among which MAP and DPI are inviolable due to its cross-linguistic universality. Once LFC is violated, there must be compensation on the part of DPI, otherwise, the verb of creation in question would be unacceptable to double-object construction. 展开更多
关键词 double-object construction verbs of creation DOC formation operation mechanism
下载PDF
Advances in Studies about Rural Financial Poverty Alleviation from the Perspective of Targeted Poverty Alleviation 被引量:2
9
作者 Ling ZHANG Wei QIN 《Asian Agricultural Research》 2018年第2期11-15,共5页
With the objective of building a well-off society in an all-round way reaching the decisive stage,poverty alleviation enters the final stage,and rural financial poverty alleviation is increasingly becoming a hot topic... With the objective of building a well-off society in an all-round way reaching the decisive stage,poverty alleviation enters the final stage,and rural financial poverty alleviation is increasingly becoming a hot topic of various circles of society. In order to accelerate the poverty alleviation and provide references and recommendations for further development of theory and practice of financial poverty alleviation,this paper made an overview of the organization system,operation mechanism and service products of rural financial poverty alleviation,elaborated the development path of financial poverty alleviation,and came up with recommendations for financial poverty alleviation. 展开更多
关键词 Rural financial poverty alleviation Product service Organization system Operation mechanism
下载PDF
Green Energy Development System under the Background of Environmental Sustainability 被引量:1
10
作者 Qin Liu Ruliang Zhang 《Energy Engineering》 EI 2021年第1期173-187,共15页
With the continuous advancement of economic globalization,energy demand is expanding and energy consumption is excessive,which leads to energy shortage.Unreasonable energy use also brings great challenges to the envir... With the continuous advancement of economic globalization,energy demand is expanding and energy consumption is excessive,which leads to energy shortage.Unreasonable energy use also brings great challenges to the environment and affects the balance of the ecosystem seriously.The rise of the third industrial revolution has injected new vitality into energy system.The construction of energy Internet system,which integrates Internet technology and energy technology,has become a new energy system of sustainable development.It has put forward the reform scheme for the mismatch of energy demand points and environmental pollution.The deepening of sustainable development strategy accelerates the promotion of energy Internet system,promotes the large-scale utilization and sharing of renewable energy.It also provides a new idea for realizing green energy structure and efficient energy utilization.Firstly,based on the core concept of energy Internet system,this paper reviews the relevant research on energy Internet system in academic and industrial circles,and gives the preliminary definition of energy Internet system market.On this basis,it puts forward the development goal of energy Internet system market.It compares the new energy Internet system market with the traditional single energy market,highlighting the characteristics of energy Internet system market,it is reflected in the diversified transformation of market trading subjects,the diversification of market trading objects,the increasing dependence of information technology and the improvement of the matching degree of supply and demand.Then,the integrated architecture of of the energy Internet system market is carried out,and the issues related to the transaction mode and operation mechanism of the energy Internet system market are discussed.Finally,the frontier problems of energy Internet system market are summarized,and the research prospect of energy Internet system market is put forward. 展开更多
关键词 Energy Internet system market integrated architecture transaction mode operating mechanism
下载PDF
Controlling Agricultural Tridimensional Pollution through Circular Economy Mechanism 被引量:1
11
作者 Lijian Zhang Lizhi Zhu 《Chinese Business Review》 2005年第6期11-14,23,共5页
Agricultural tridimensional pollution (AtriP) has multi-directional and complicated chains. Circular economy is found to be an efficient mechanism that can help control AtriP. The application of three circular econo... Agricultural tridimensional pollution (AtriP) has multi-directional and complicated chains. Circular economy is found to be an efficient mechanism that can help control AtriP. The application of three circular economic modes in agriculture and its related industries call not only interdict the AtriP chains in different stages and different directions, but also produce greater ecological, social and economical returns with less input. Nevertheless, it is a complicated systematic engineering to construct and implement effective circular economic modes to bring AtriP under control, and it depends not only on the support of the relevant technology system, but also on the supports of the relevant policies and law systems. 展开更多
关键词 agricultural tridimensional pollution (AtriP) circular economy operating mechanism practical mode
下载PDF
An Analysis of the Operation Mechanism of Chemical Industry Park Ecosystem Based on Theory of Ecological Organization
12
作者 Bilin Xu Mei Han 《Energy Engineering》 EI 2021年第2期323-339,共17页
Based on the theory of ecological organization,this paper analyzes the operation mechanism of chemical industry park(CIP)ecosystem by means of dynamic simulation.The research shows that the CIP ecosystem is a complex ... Based on the theory of ecological organization,this paper analyzes the operation mechanism of chemical industry park(CIP)ecosystem by means of dynamic simulation.The research shows that the CIP ecosystem is a complex ecological system whose operation mechanism includes two levels,namely individual enterprises and ecosystem.At the level of individual enterprise,there are competition,symbiosis,invasion and other interactions between enterprises in the CIP ecosystem.Through the pre-determined judgment of the competition effect coefficient and the symbiosis effect coefficient,we calculate how the enterprises influence each other,and then generate their respective operation paths,andfinally realize the long-term balance of the system.At the level of ecosystem,the CIP ecosystem makes self-organizing and self-adaptive adjustments and changes due to the changes of the exter-nal environment in policy,manpower,technology,capital,market,etc.,thus reaching the equilibrium state of coordinated operation and stable symbiosis with the external environment. 展开更多
关键词 ECOSYSTEM operation mechanism enterprise evolution ecological organization environmental protection policy
下载PDF
Study on Operation Mechanism of Enterprise's Post Monetization Management
13
作者 Laisheng Xiang 《Chinese Business Review》 2006年第6期29-33,共5页
Enterprise's post monetization management is one of the important achievements of business management innovation. The paper defines the meaning of enterprise's post monetization management mechanism, which includes ... Enterprise's post monetization management is one of the important achievements of business management innovation. The paper defines the meaning of enterprise's post monetization management mechanism, which includes benefit, supply, demand, competition and incentive mechanism, and specifically explains the meaning and function of each subsystem in order to profoundly crystallize and grasp the importance of enterprise's post monetization management in the aspect of raising business management level. 展开更多
关键词 internal marketization post monetization operation mechanism business management
下载PDF
Safeguard Measures for the Development of Agricultural Science and Technology Parks
14
作者 Gang HU Peng YANG 《Asian Agricultural Research》 2017年第7期18-22,共5页
Healthy development of agricultural science and technology parks needs perfect operation mechanism. On the basis of current situations,this paper came up with several safeguard measures for improving the operation mec... Healthy development of agricultural science and technology parks needs perfect operation mechanism. On the basis of current situations,this paper came up with several safeguard measures for improving the operation mechanism of agricultural science and technology parks,mainly including organization operation mechanism,technological guarantee mechanism,fund guarantee mechanism,and talent guarantee mechanism. 展开更多
关键词 Agricultural science and technology parks Operation mechanism Guarantee mechanism
下载PDF
China National Textiles I/E Corp Reforms Operational Mechanism
15
作者 Ren Xiaoqiang,Staff Reporter 《China's Foreign Trade》 1995年第6期39-39,共1页
The China National Textiles I/E Corp (Chinatex), one of the foreign trade companies in the country with the biggest import and export value, exported more textiles and expanded its business at home and abroad in 1994,... The China National Textiles I/E Corp (Chinatex), one of the foreign trade companies in the country with the biggest import and export value, exported more textiles and expanded its business at home and abroad in 1994, in spite of the shortage of raw materials and the rise in prices. Chinatex’s import and export value totalled US$2.718 billion last year, a rise of 43.9% over the previous year. The quality of the exports also improved. The company’s Beijing branch exported US$370 million worth of goods, 33.3% more than in the previous year. Its enterprises abroad had a turnover of US$1 billion in 1994. 展开更多
关键词 MORE US China National Textiles I/E Corp Reforms Operational Mechanism THAN over
下载PDF
Research on the Operation Mechanism and Promotion Path of Crowdfunding for Rural Tourism
16
作者 Hongxia DONG Hui WANG 《Asian Agricultural Research》 2021年第12期12-15,共4页
This paper studies the operation mechanism of crowdfunding for rural tourism from three aspects:the main body of crowdfunding for rural tourism,driving factors and operating stage.At the same time,this paper analyzes ... This paper studies the operation mechanism of crowdfunding for rural tourism from three aspects:the main body of crowdfunding for rural tourism,driving factors and operating stage.At the same time,this paper analyzes the operation risk of crowdfunding for rural tourism from five aspects:legal risk,information asymmetry risk,capital security risk,interest subject conflict risk and industry development risk.It also puts forward measures and suggestions on the promotion of crowdfunding for rural tourism from four aspects:improving market awareness,providing professional services,issuing relevant laws and regulations and regulating the development of the industry. 展开更多
关键词 Rural tourism CROWDFUNDING Operation mechanism Promotion path
下载PDF
A Study on the Changes of Medical Insurance Operation Mechanism in China
17
作者 HUANG Tingting WANG Shu 《International English Education Research》 2017年第2期39-41,共3页
The operating mechanism refers to the structural setup, component assembly and inspection maintenance of the safeguards and its efficient operation. Health insurance management mechanism refers to the effective combin... The operating mechanism refers to the structural setup, component assembly and inspection maintenance of the safeguards and its efficient operation. Health insurance management mechanism refers to the effective combination, governance, operation, evaluation and improvement of medical service stakeholders. It is a series of institutional arrangements to effectively provide medical services and safeguard the interests of beneficiaries." 展开更多
关键词 Health care GOVERNANCE Operation Mechanism TRANSFORMATION
下载PDF
The Initial Exploration of The Catastrophic Medical Insurance in Shanghai
18
作者 Liu Jiao Youchun 《International English Education Research》 2015年第4期33-35,共3页
Developing the catastrophic medical insurance for urban and rural residents positively is the key action to keep the new round of reform for medical system into deep. However this insurance is the 'shortage' of the ... Developing the catastrophic medical insurance for urban and rural residents positively is the key action to keep the new round of reform for medical system into deep. However this insurance is the 'shortage' of the national health system, so the Shanghai government carries out The Trial Measures for Catastrophic Medical Insurance of urban and rural residents in 2014. In this thesis, we will describe the current situation of the catastrophic medical insurance in Shanghai from aspects of financing, level of compensation, the way to undertake and regulatory. What's more, we expect to explore the weakness of catastrophic medical insurance in actual motion, and offer proposals for progressively realizing the integration of urban and rural in medical insurance, improving the basic health care directory, enhancing cooperation with commercial medical insurance. 展开更多
关键词 catastrophic medical insurance operational mechanism cooperation office INTEGRATION
下载PDF
Speeding Up the Transformation of the Operational Mechanism And Further Developing the International Market
19
作者 Ji Zhang 《China's Foreign Trade》 1997年第9期11-12,共2页
According to customs statistics, China’s exports of machinery and electric products in 1996 were worth US$ 48.21 billion, an increase of 9.9 percent over the preceding year, and 8.4 percent higher than the growth rat... According to customs statistics, China’s exports of machinery and electric products in 1996 were worth US$ 48.21 billion, an increase of 9.9 percent over the preceding year, and 8.4 percent higher than the growth rate of the nation’s total exports. The proportion of machinery and electric product exports in the nation’s total foreign trade volume\ increased from 29.5 percent in 1995 to 31.9 percent in 1996, a growth at 2.4 percent. 展开更多
关键词 Speeding Up the Transformation of the Operational Mechanism And Further Developing the International Market THAN
下载PDF
Study on the Self-supporting Logistics Mode based on B2C E-commerce Enterprises
20
作者 Ting LI 《International Journal of Technology Management》 2015年第2期87-89,共3页
Taking B2C E-commerce enterprises as the center, it can be divided into a set of logistics activities upstream supply chain logistics producer to B2C e-commerce enterprises, and the B2C e-commerce enterprise logistics... Taking B2C E-commerce enterprises as the center, it can be divided into a set of logistics activities upstream supply chain logistics producer to B2C e-commerce enterprises, and the B2C e-commerce enterprise logistics to client consumer, and the paper focuses on the study of self-supporting logistics for the E-commerce enterprise. According to the development status of current B2C electronic commerce enterprise in our country and logistics, the paper study B2C electric business enterprise how to correctly choose the logistics mode and how to promote the business logistics operation level. 展开更多
关键词 B2C E-commerce Logistics distribution Self-supporting Logistics Mode operating mechanism
下载PDF
上一页 1 2 下一页 到第
使用帮助 返回顶部