This paper analyzes the present development situations of the real estate industry, puts forwards the low carbon development strategies based on the project life cycle for the real estate enterprises, and points out t...This paper analyzes the present development situations of the real estate industry, puts forwards the low carbon development strategies based on the project life cycle for the real estate enterprises, and points out the corresponding assistant suggestions according to the predicament in the implementation of low carbon strategy. The purpose is to provide a theoretical reference for low carbon development of the real estate enterprises and the healthy and sustainable development of the real estate industry.展开更多
With the rapid development of social economy, the application field of value engineering is gradually extensive. At present, the value engineering of advanced countries such as the United States, Britain, Germany, Jap...With the rapid development of social economy, the application field of value engineering is gradually extensive. At present, the value engineering of advanced countries such as the United States, Britain, Germany, Japan and South Korea has been very mature in its application in the design stage of EPC projects, and has also obtained many successful experiences in the cost control of the construction industry. However, China is still lagging behind in this aspect. Based on this, this paper will comprehensively analyze the meaning of value engineering in EPC projects, the direction of cost control and management in the design stage of EPC projects based on value engineering, the cost control and management system in the design stage of EPC projects based on value engineering, and the cost control methods in the design stage of value engineering in EPC projects, so as to promote the good practice and sustainable development of value engineering in China's EPC projects.展开更多
Existing literature has shown that the control force at the nose could cause dynamic instability for controlled projectiles. To lower the adverse impact on the dual-spin projectile with fixed canards under the premise...Existing literature has shown that the control force at the nose could cause dynamic instability for controlled projectiles. To lower the adverse impact on the dual-spin projectile with fixed canards under the premise of meeting guidance system requirements, the influence of control moment provided by a motor on the flight stability is analyzed in this paper. Firstly, the effect of the rolling movement on stability is analyzed based on the stability criterion derived using the Hurwitz stability theory. Secondly, the evaluation parameters combining the features of different control periods that could assess the variation of stability features after the motor torque are obtained. These effective formulas are used to indicate that, to reduce the flight instability risks, the stabilized rolling speed of roll speed keeping period should be as small as possible; the variation trend of motor torque during the rolling speed controlling period and the roll angle of the forward body during roll angle switching period are recommended corresponding to the projectile and trajectory characteristics. Moreover,detailed numerical simulations of 155 mm dual-spin projectile are satisfactory agreement with the theoretical results.展开更多
Project portfolio management(PPM) is the centralized management method, process and technology in multiple projects. When multiple projects in the space industry are implemented, it provides an effective methodology t...Project portfolio management(PPM) is the centralized management method, process and technology in multiple projects. When multiple projects in the space industry are implemented, it provides an effective methodology to resolve the problems at the same time such as conflicts among models, decrease in design efficiency,and increase in target deviation. Hence, a PPM dedicated to multiple projects management in space enterprise is presented in this paper. Firstly, an analysis of features and contents in space enterprise portfolio management mode is performed by using PPM based on its specific strategic characteristics. Then, the principle and selection methods of PPM are provided as a reference for the future development of an enterprise. Finally, a multiple-level organization architecture including decision making layers, function management layers and project execution layers is proposed so as to adapt to possible changes in the multiple projects and correspond to the strategic development. As a consequence, a perfect matching mechanism to fit the changes in PPM modes is reached. In addition, the flow chart of PPM is designed and optimized by analyzing the implementation procedure of strategic target and project portfolio life-cycle, which is expected to realize the purpose of improving space enterprise management efficiency, project management capacity, innovation development and economic benefits.展开更多
Based on the newly-developed element energy projection （EEP） method for computation of super-convergent results in one-dimensional finite element method （FEM）, the task of self-adaptive FEM analysis was converted ...Based on the newly-developed element energy projection （EEP） method for computation of super-convergent results in one-dimensional finite element method （FEM）, the task of self-adaptive FEM analysis was converted into the task of adaptive piecewise polynomial interpolation. As a result, a satisfactory FEM mesh can be obtained, and further FEM analysis on this mesh would immediately produce an FEM solution which usually satisfies the user specified error tolerance. Even though the error tolerance was not completely satisfied, one or two steps of further local refinements would be sufficient. This strategy was found to be very simple, rapid, cheap and efficient. Taking the elliptical ordinary differential equation of second order as the model problem, the fundamental idea, implementation strategy and detailed algorithm are described. Representative numerical examples are given to show the effectiveness and reliability of the proposed approach.展开更多
During the process of enterprises＇ strategy evaluation and selection, there are many evaluating indicators, and among them there are some potential correlations and conflicts. Thus it poses the problems to the decisi...During the process of enterprises＇ strategy evaluation and selection, there are many evaluating indicators, and among them there are some potential correlations and conflicts. Thus it poses the problems to the decision-makers how to conduct correct evaluation on a business and how to make strategy adjustment and selection according to the evaluation. Based on the qualitative and quantitative method, the paper introduces the Projection Pursuit Classification （PPC） model based on the Real-coded Accelerating Genetic Algorithm （RAGA） into the process of enterprises＇ strategy evaluation and selection. The characteristic of PPC model is that it ultimately overcomes the influence of the proportion of subjectivity and avoids precocious convergence, thus providing a new objective method for strategy evaluation and selection by pursuing the most objective strategy evaluation to make the relatively sensible strategy portfolio and action.展开更多
This paper gives an overview of the Lee Carter method and reiterates the feasibility of using it to construct mortality forecast for the population data. In a first step, the model is fitted in a traditional way and u...This paper gives an overview of the Lee Carter method and reiterates the feasibility of using it to construct mortality forecast for the population data. In a first step, the model is fitted in a traditional way and used to extrapolate forecast of the time-varying mortality index. The observed pattern of the mortality rates shows a different variability at different ages, highlighting that the homoscedasticity hypothesis is quite unrealistic. Thus, in a second step, the paper aims to produce more reliable mortality forecasting, focusing on the errors in the estimation of the model parameters. The robustness of the estimated parameter is analysed throughout an experimental strategy which allows to assess the robustness of the Lee Carter model by inducing the errors to satisfy the homoscedasticity hypothesis. The graphical and numerical results are tested by means of a comparison in terms of prediction accuracy.展开更多
Bargaining between the host country and oil companies is very common to international oil and gas development projects.The existence of information asymmetry gives the host country an endogenous bargaining advantage.F...Bargaining between the host country and oil companies is very common to international oil and gas development projects.The existence of information asymmetry gives the host country an endogenous bargaining advantage.Foreign oil companies might change their unfavorable negotiating position by changing the order of bidding and adjusting bidding strategies.This paper introduces both factors into a bilateral bargaining model to study the impact of information asymmetry and bidding order on the strategy and equilibrium returns of oil companies.According to the ownership of the right to bid first,two scenarios are designed for the model to compare the equilibrium returns of the host country and oil companies.The results show that:1)There is a first-mover advantage in the process of bilateral bidding,so oil companies better bid first;2)The information asymmetry will lead to a higher nominal income ratio of oil companies and a lower nominal income ratio of the host country,but it doesn’t affect the total income ratio at all.展开更多
In this paper, we conduct research on the present situation and improvement strategy of the water conservancy project construction quality management based on quality efficiency equilibrium theory. Water conservancy e...In this paper, we conduct research on the present situation and improvement strategy of the water conservancy project construction quality management based on quality efficiency equilibrium theory. Water conservancy engineering construction enterprises should refer to oneself circumstance, and the characteristics of the water conservancy project, determine the quality objectives of specific quality assurance plan and the related measures, clear implementation content, methods and effects. Strictly control the factors influencing the water conservancy engineering quality of many aspects, in the process of the water conservancy project construction, to establish a meet the requirements of the technical process and quality standards, operation procedures. Establish the strict appraisal system, continuous improvement and improve the level of construction technique and technology. Establish strict quality assurance system and quality responsibility system, each division, subdivisional work will comprehensively implement in place management to ensure the engineering quality.展开更多
In recent years, with the development of urbanization in China, the field of architecture has ushered in development opportunities. In order to play the real role of architecture, we need to rely on management to ensu...In recent years, with the development of urbanization in China, the field of architecture has ushered in development opportunities. In order to play the real role of architecture, we need to rely on management to ensure the quality.However, many construction enterprises are not aware of this and still use the traditional management mode, which leads to frequent construction problems and construction quality. In order to reverse this situation, construction enterprises should deeply realize the significance of improving construction quality management, find out management loopholes from the current situation, and then take remedial measures.展开更多
In the process of continuous economic development, the overall demand for petrochemical industry has increased significantly, which is an important development opportunity for petrochemical industry. At present, the p...In the process of continuous economic development, the overall demand for petrochemical industry has increased significantly, which is an important development opportunity for petrochemical industry. At present, the petrochemical industry is a pillar industry. In order to promote the development of this industry in a better direction, during the construction of engineering projects, we should pay attention to the implementation of safety management, reduce the probability of safety accidents, and make the projects proceed in an orderly state.展开更多
With the development of economy and society, urbanization is also developing rapidly. Therefore, many construction companies have appeared. The appearance of these companies has accelerated the urbanization process an...With the development of economy and society, urbanization is also developing rapidly. Therefore, many construction companies have appeared. The appearance of these companies has accelerated the urbanization process and improved the urbanization level. However, there are advantages and disadvantages. In the process of urbanization, a lot of pollution has been caused, such as noise pollution, dust pollution, light pollution, etc., which has a significant impact on peoples lives and health. With the continuous development of urbanization, the concept of low-carbon life came into being. This is a new concept of environmental protection and green construction, and it is also the aspiration of people for green development in the new era. Therefore, all localities are also actively taking measures to reduce the pollution hazards of construction projects.展开更多
Nuclear power project is one of the important development projects in China and in the process of the project, reasonable schedule control is very important. With the change of China's economic system, the contrac...Nuclear power project is one of the important development projects in China and in the process of the project, reasonable schedule control is very important. With the change of China's economic system, the contract mode of the project has also changed. In order to guarantee the process of development of nuclear power project goes well, the country's nuclear power project in the new EPC contract mode, the following based on the brief analysis of EPC contract mode, to explore how nuclear power project in EPC mode to ensure the progress control, thereby reducing the problem in the process of nuclear power project, and promote the development of the process of nuclear power project in China, perfecting the deficiencies in the progress control of nuclear power project under EPC mode.展开更多
With the rapid rise of China's economic market, People's quality of life and standard of living have been significantly improved, providing a broader development platform for the construction engineering indus...With the rapid rise of China's economic market, People's quality of life and standard of living have been significantly improved, providing a broader development platform for the construction engineering industry. In the development process of construction engineering industry, cost management plays an important role. It is the key to improve the economic benefits of the project and establish a good social image of the enterprise. Therefore, relevant personnel should clarify the important responsibilities of cost control in the whole process of construction project management, adhere to the basic principles of cost management, highlight the professional abilities, so as to improve the effect of cost management and better serve the development of the industry. Next, the article discusses the whole process cost control strategy in construction project management.展开更多
In the process of social and economic development, the civil engineering industry has also invested a lot of funds and material resources. But in the process of civil engineering construction, the construction schedul...In the process of social and economic development, the civil engineering industry has also invested a lot of funds and material resources. But in the process of civil engineering construction, the construction schedule and quality management are relatively complex, which also brings pressure to the management personnel. At the same time, with the change of the overall construction market, it also puts forward higher requirements for civil engineering construction progress and quality management. Therefore, in the process of civil engineering construction, safety problems should be avoided and progress and quality management should be strengthened. At the same time, managers should realize the importance of their own work and optimize and innovate the deficiencies in progress and quality management, so as to improve the effect of civil engineering construction progress and quality management and promote the development of civil engineering industry.展开更多
With the gradual acceleration of the urbanization process,the construction industry has been developing rapidly.As the key link to ensure the quality and safety of the project,construction management and construction ...With the gradual acceleration of the urbanization process,the construction industry has been developing rapidly.As the key link to ensure the quality and safety of the project,construction management and construction quality control are of great significance to enhance the competitiveness of construction enterprises and realize sustainable development.In this paper,the effective strategy of construction management and the effective strategy of construction quality control will be discussed in depth,aiming at providing useful management and quality control strategies for construction enterprises.展开更多
In nuclear power to ensure that nuclear power air conditioning can maintain stable operation, it is necessary to use construction technology reasonably in the process of equipment installation, so as to improve the re...In nuclear power to ensure that nuclear power air conditioning can maintain stable operation, it is necessary to use construction technology reasonably in the process of equipment installation, so as to improve the reliability of equipment operation, provide an important guarantee for the efficient operation of equipment, and prevent the emergence of equipment operation problems. Firstly, this paper studies and analyzes the construction project management strategy of nuclear power air conditioning installation, hoping to provide some reference and help for the application of nuclear power air conditioning equipment installation construction technology.展开更多
In the construction of water conservancy projects, mechanical and electrical equipment is one of the most important technologies. Once problems occur, it will have a very serious negative impact on the whole water con...In the construction of water conservancy projects, mechanical and electrical equipment is one of the most important technologies. Once problems occur, it will have a very serious negative impact on the whole water conservancy project. The mechanical and electrical equipment installation of water conservancy projects requires the staff to have strong working ability, not only high-level installation technology, but also perfect management system. Therefore, this paper will study the installation technology and construction management of mechanical and electrical equipment in water conservancy projects, and put forward some optimization strategies to ensure the normal operation of water conservancy projects.展开更多
文摘This paper analyzes the present development situations of the real estate industry, puts forwards the low carbon development strategies based on the project life cycle for the real estate enterprises, and points out the corresponding assistant suggestions according to the predicament in the implementation of low carbon strategy. The purpose is to provide a theoretical reference for low carbon development of the real estate enterprises and the healthy and sustainable development of the real estate industry.
文摘With the rapid development of social economy, the application field of value engineering is gradually extensive. At present, the value engineering of advanced countries such as the United States, Britain, Germany, Japan and South Korea has been very mature in its application in the design stage of EPC projects, and has also obtained many successful experiences in the cost control of the construction industry. However, China is still lagging behind in this aspect. Based on this, this paper will comprehensively analyze the meaning of value engineering in EPC projects, the direction of cost control and management in the design stage of EPC projects based on value engineering, the cost control and management system in the design stage of EPC projects based on value engineering, and the cost control methods in the design stage of value engineering in EPC projects, so as to promote the good practice and sustainable development of value engineering in China's EPC projects.
文摘Existing literature has shown that the control force at the nose could cause dynamic instability for controlled projectiles. To lower the adverse impact on the dual-spin projectile with fixed canards under the premise of meeting guidance system requirements, the influence of control moment provided by a motor on the flight stability is analyzed in this paper. Firstly, the effect of the rolling movement on stability is analyzed based on the stability criterion derived using the Hurwitz stability theory. Secondly, the evaluation parameters combining the features of different control periods that could assess the variation of stability features after the motor torque are obtained. These effective formulas are used to indicate that, to reduce the flight instability risks, the stabilized rolling speed of roll speed keeping period should be as small as possible; the variation trend of motor torque during the rolling speed controlling period and the roll angle of the forward body during roll angle switching period are recommended corresponding to the projectile and trajectory characteristics. Moreover,detailed numerical simulations of 155 mm dual-spin projectile are satisfactory agreement with the theoretical results.
基金the National Natural Science Foundation of China(No.71172123)the Aviation Science Fund of China(No.2012ZG53083)
文摘Project portfolio management(PPM) is the centralized management method, process and technology in multiple projects. When multiple projects in the space industry are implemented, it provides an effective methodology to resolve the problems at the same time such as conflicts among models, decrease in design efficiency,and increase in target deviation. Hence, a PPM dedicated to multiple projects management in space enterprise is presented in this paper. Firstly, an analysis of features and contents in space enterprise portfolio management mode is performed by using PPM based on its specific strategic characteristics. Then, the principle and selection methods of PPM are provided as a reference for the future development of an enterprise. Finally, a multiple-level organization architecture including decision making layers, function management layers and project execution layers is proposed so as to adapt to possible changes in the multiple projects and correspond to the strategic development. As a consequence, a perfect matching mechanism to fit the changes in PPM modes is reached. In addition, the flow chart of PPM is designed and optimized by analyzing the implementation procedure of strategic target and project portfolio life-cycle, which is expected to realize the purpose of improving space enterprise management efficiency, project management capacity, innovation development and economic benefits.
基金Project supported by the National Natural Science Foundation of China (No.50278046)
文摘Based on the newly-developed element energy projection （EEP） method for computation of super-convergent results in one-dimensional finite element method （FEM）, the task of self-adaptive FEM analysis was converted into the task of adaptive piecewise polynomial interpolation. As a result, a satisfactory FEM mesh can be obtained, and further FEM analysis on this mesh would immediately produce an FEM solution which usually satisfies the user specified error tolerance. Even though the error tolerance was not completely satisfied, one or two steps of further local refinements would be sufficient. This strategy was found to be very simple, rapid, cheap and efficient. Taking the elliptical ordinary differential equation of second order as the model problem, the fundamental idea, implementation strategy and detailed algorithm are described. Representative numerical examples are given to show the effectiveness and reliability of the proposed approach.
文摘During the process of enterprises＇ strategy evaluation and selection, there are many evaluating indicators, and among them there are some potential correlations and conflicts. Thus it poses the problems to the decision-makers how to conduct correct evaluation on a business and how to make strategy adjustment and selection according to the evaluation. Based on the qualitative and quantitative method, the paper introduces the Projection Pursuit Classification （PPC） model based on the Real-coded Accelerating Genetic Algorithm （RAGA） into the process of enterprises＇ strategy evaluation and selection. The characteristic of PPC model is that it ultimately overcomes the influence of the proportion of subjectivity and avoids precocious convergence, thus providing a new objective method for strategy evaluation and selection by pursuing the most objective strategy evaluation to make the relatively sensible strategy portfolio and action.
文摘This paper gives an overview of the Lee Carter method and reiterates the feasibility of using it to construct mortality forecast for the population data. In a first step, the model is fitted in a traditional way and used to extrapolate forecast of the time-varying mortality index. The observed pattern of the mortality rates shows a different variability at different ages, highlighting that the homoscedasticity hypothesis is quite unrealistic. Thus, in a second step, the paper aims to produce more reliable mortality forecasting, focusing on the errors in the estimation of the model parameters. The robustness of the estimated parameter is analysed throughout an experimental strategy which allows to assess the robustness of the Lee Carter model by inducing the errors to satisfy the homoscedasticity hypothesis. The graphical and numerical results are tested by means of a comparison in terms of prediction accuracy.
基金the financial support provided by the Humanities and Social Sciences Program of Chinese Ministry of Education(Grant Nos.19YJCZH106 and 20YJCZH201)National Natural Science Foundation of China(Grant Nos.71904111 and 71774105)Program for the Philosophy and Social Sciences Research of Higher Learning Institutions of Shanxi(Grant No.201803079,2nd[2018]of Jin Education)。
文摘Bargaining between the host country and oil companies is very common to international oil and gas development projects.The existence of information asymmetry gives the host country an endogenous bargaining advantage.Foreign oil companies might change their unfavorable negotiating position by changing the order of bidding and adjusting bidding strategies.This paper introduces both factors into a bilateral bargaining model to study the impact of information asymmetry and bidding order on the strategy and equilibrium returns of oil companies.According to the ownership of the right to bid first,two scenarios are designed for the model to compare the equilibrium returns of the host country and oil companies.The results show that:1)There is a first-mover advantage in the process of bilateral bidding,so oil companies better bid first;2)The information asymmetry will lead to a higher nominal income ratio of oil companies and a lower nominal income ratio of the host country,but it doesn’t affect the total income ratio at all.
文摘In this paper, we conduct research on the present situation and improvement strategy of the water conservancy project construction quality management based on quality efficiency equilibrium theory. Water conservancy engineering construction enterprises should refer to oneself circumstance, and the characteristics of the water conservancy project, determine the quality objectives of specific quality assurance plan and the related measures, clear implementation content, methods and effects. Strictly control the factors influencing the water conservancy engineering quality of many aspects, in the process of the water conservancy project construction, to establish a meet the requirements of the technical process and quality standards, operation procedures. Establish the strict appraisal system, continuous improvement and improve the level of construction technique and technology. Establish strict quality assurance system and quality responsibility system, each division, subdivisional work will comprehensively implement in place management to ensure the engineering quality.
文摘In recent years, with the development of urbanization in China, the field of architecture has ushered in development opportunities. In order to play the real role of architecture, we need to rely on management to ensure the quality.However, many construction enterprises are not aware of this and still use the traditional management mode, which leads to frequent construction problems and construction quality. In order to reverse this situation, construction enterprises should deeply realize the significance of improving construction quality management, find out management loopholes from the current situation, and then take remedial measures.
文摘In the process of continuous economic development, the overall demand for petrochemical industry has increased significantly, which is an important development opportunity for petrochemical industry. At present, the petrochemical industry is a pillar industry. In order to promote the development of this industry in a better direction, during the construction of engineering projects, we should pay attention to the implementation of safety management, reduce the probability of safety accidents, and make the projects proceed in an orderly state.
文摘With the development of economy and society, urbanization is also developing rapidly. Therefore, many construction companies have appeared. The appearance of these companies has accelerated the urbanization process and improved the urbanization level. However, there are advantages and disadvantages. In the process of urbanization, a lot of pollution has been caused, such as noise pollution, dust pollution, light pollution, etc., which has a significant impact on peoples lives and health. With the continuous development of urbanization, the concept of low-carbon life came into being. This is a new concept of environmental protection and green construction, and it is also the aspiration of people for green development in the new era. Therefore, all localities are also actively taking measures to reduce the pollution hazards of construction projects.
文摘Nuclear power project is one of the important development projects in China and in the process of the project, reasonable schedule control is very important. With the change of China's economic system, the contract mode of the project has also changed. In order to guarantee the process of development of nuclear power project goes well, the country's nuclear power project in the new EPC contract mode, the following based on the brief analysis of EPC contract mode, to explore how nuclear power project in EPC mode to ensure the progress control, thereby reducing the problem in the process of nuclear power project, and promote the development of the process of nuclear power project in China, perfecting the deficiencies in the progress control of nuclear power project under EPC mode.
文摘With the rapid rise of China's economic market, People's quality of life and standard of living have been significantly improved, providing a broader development platform for the construction engineering industry. In the development process of construction engineering industry, cost management plays an important role. It is the key to improve the economic benefits of the project and establish a good social image of the enterprise. Therefore, relevant personnel should clarify the important responsibilities of cost control in the whole process of construction project management, adhere to the basic principles of cost management, highlight the professional abilities, so as to improve the effect of cost management and better serve the development of the industry. Next, the article discusses the whole process cost control strategy in construction project management.
文摘In the process of social and economic development, the civil engineering industry has also invested a lot of funds and material resources. But in the process of civil engineering construction, the construction schedule and quality management are relatively complex, which also brings pressure to the management personnel. At the same time, with the change of the overall construction market, it also puts forward higher requirements for civil engineering construction progress and quality management. Therefore, in the process of civil engineering construction, safety problems should be avoided and progress and quality management should be strengthened. At the same time, managers should realize the importance of their own work and optimize and innovate the deficiencies in progress and quality management, so as to improve the effect of civil engineering construction progress and quality management and promote the development of civil engineering industry.
文摘With the gradual acceleration of the urbanization process,the construction industry has been developing rapidly.As the key link to ensure the quality and safety of the project,construction management and construction quality control are of great significance to enhance the competitiveness of construction enterprises and realize sustainable development.In this paper,the effective strategy of construction management and the effective strategy of construction quality control will be discussed in depth,aiming at providing useful management and quality control strategies for construction enterprises.
文摘In nuclear power to ensure that nuclear power air conditioning can maintain stable operation, it is necessary to use construction technology reasonably in the process of equipment installation, so as to improve the reliability of equipment operation, provide an important guarantee for the efficient operation of equipment, and prevent the emergence of equipment operation problems. Firstly, this paper studies and analyzes the construction project management strategy of nuclear power air conditioning installation, hoping to provide some reference and help for the application of nuclear power air conditioning equipment installation construction technology.
文摘In the construction of water conservancy projects, mechanical and electrical equipment is one of the most important technologies. Once problems occur, it will have a very serious negative impact on the whole water conservancy project. The mechanical and electrical equipment installation of water conservancy projects requires the staff to have strong working ability, not only high-level installation technology, but also perfect management system. Therefore, this paper will study the installation technology and construction management of mechanical and electrical equipment in water conservancy projects, and put forward some optimization strategies to ensure the normal operation of water conservancy projects.
