With its wide use in different fields, the problem of the convergence of simple genetic algorithms (GAs) has been concerned. In the past, the research on the convergence of GAs was based on Holland's model theorem...With its wide use in different fields, the problem of the convergence of simple genetic algorithms (GAs) has been concerned. In the past, the research on the convergence of GAs was based on Holland's model theorem. The diversity of the evolutionary population and the convergence of GAs are studied by using the concept of negentropy based on the discussion of the characteristic of GA. Some test functions are used to test the convergence of GAs, and good results have been obtained. It is shown that the global optimization may be obtained by selecting appropriate parameters of simple GAs if the evolution time is enough.展开更多
In this paper, we begin with the swift changes in the knowledge economy time,analyze the implication of the agility, and consider the agile virtual enterprise as the mainorganizational form for the manufacturing enter...In this paper, we begin with the swift changes in the knowledge economy time,analyze the implication of the agility, and consider the agile virtual enterprise as the mainorganizational form for the manufacturing enterprises to realize agility. We classify the agilevirtual enterprises into products alliance style and knowledge alliance style, and compares theirmain features and profit distribution models. As a result, we give four basic structures for thebuilding and running of the agile virtual enterprises.展开更多
On the foundation of analyzing the closed loop logistics chain of product with multi-lifecycle, the connotation of environmental value is set forth, recurring to such conceptions as supply chain and value chain. The p...On the foundation of analyzing the closed loop logistics chain of product with multi-lifecycle, the connotation of environmental value is set forth, recurring to such conceptions as supply chain and value chain. The plotting rules about disassembly tree are discussed in detail. The reachable matrix R of components’ disas- sembly is introduced into distinguishing if disassembly is needed, in combination with disassembly-deciding vector X. Furthermore, the arithmetic of disassembly cost is put forward. And the cost-benefits of components’ reusing, materials’ recycling, safety disposing are dissertated based on the activity-based costing. Then the 0-1 goal-programming model on product recovery processing is established, with components’ demotion calculated. In addition, taking the PC’s recovery processing for example, we put it into application.展开更多
Aerospace microelectronic technology has become the core competence of aerospace technology. For evaluating the aerospace microelectronic industry, it is necessary to change descriptive language of goal to quantitativ...Aerospace microelectronic technology has become the core competence of aerospace technology. For evaluating the aerospace microelectronic industry, it is necessary to change descriptive language of goal to quantitative index that can be measured. Knowing quantified goals or tree structure and array of general goal system, with certain algorithm and processing each corresponding list or array, we can bring out a quantified general goal value. The multi-objective (multi-attribute) evaluation method and the relevant weight sum algorithm have been adopted to quantitatively evaluate and forecast the developing state of the industry. A practical example illustrates that the applied decision technique and the algorithm are feasible and effective.展开更多
The application of the optimal sinter burden design in the sinter shop of No.1 Iron-making Plant in Tangshan Iron & Steel Corp was reported. By using burden calculation andsimulating production under different sit...The application of the optimal sinter burden design in the sinter shop of No.1 Iron-making Plant in Tangshan Iron & Steel Corp was reported. By using burden calculation andsimulating production under different situations, it is demonstrated that the technology can providethe relevant information in product quality and cost etc. for decision-makers. The technology hasbeen used to guide production of the Sinter Shop since 2000, and a remarkable achievement has beenobtained.展开更多
目的系统评价儿童青少年继发性高血压的患病现状、病因构成及临床特征,为儿童青少年继发性高血压的鉴别诊断提供参考。方法检索中国知网、维普网、万方数据知识服务平台、Pub Med和Web of Science核心合集数据库建库至2024年6月发表的...目的系统评价儿童青少年继发性高血压的患病现状、病因构成及临床特征,为儿童青少年继发性高血压的鉴别诊断提供参考。方法检索中国知网、维普网、万方数据知识服务平台、Pub Med和Web of Science核心合集数据库建库至2024年6月发表的相关文献。采用meta分析综合评估儿童青少年继发性高血压的患病比例,并探讨其病因构成与临床特征。结果共纳入35篇文献,涉及8754例继发性高血压患儿。在临床高血压患儿中,继发性高血压占比为57.0%,肾性疾病为儿童青少年继发性高血压的首位病因(68.6%),其次为风湿免疫性疾病(10.9%)。年龄、继发性高血压家族史、蛋白尿和心电图改变是诊断儿童青少年继发性高血压的敏感指标。结论继发性高血压是临床中儿童青少年主要的高血压类型,肾性疾病居首位病因。年龄、继发性高血压家族史、蛋白尿和心电图改变可为继发性高血压的鉴别诊断提供线索。展开更多
We put forward the credit targets sequences set and ordering structure of credit targets sequences and the dominance structure in credit targets sequences set. We also give a model to evaluate customer's credit by...We put forward the credit targets sequences set and ordering structure of credit targets sequences and the dominance structure in credit targets sequences set. We also give a model to evaluate customer's credit by the deviation.展开更多
Like value chain and supply chain, “industrial chain” becomes the focus of attention. The implication of “industrial chain” has gained a large range of extension. It not only expresses the industrial “chain” str...Like value chain and supply chain, “industrial chain” becomes the focus of attention. The implication of “industrial chain” has gained a large range of extension. It not only expresses the industrial “chain” structure and relationship of “back and forward”in order or “up and down” in direction, but also it represents a cluster of large scale of firms in an area or colony. It is a network, or a community. Consequently, we conclude that “industrial chain” is a synthesis of industrial chain, industrial cluster, or industrial network.In this article, firstly we will distinguish industry chain from industry. An industry is the collection of firms that have the same attribute, so an industry can be defined by firm collection of certain attribute. We indicate that industrial chain is a kind of vertical and orderly industrial link. It is defined according to a series of specific product or service created. Secondly we analyze the vertical orderly defiinition process from the aspects of social division of labor and requirement division, self-organization system, and value analysis.Non-symmetry and depending on system or community of large scale of industrial units lead to entire industry to “orderly” structure. On the other hand, the draught of diversity and complexity of requirement simultaneously lead to entire industry to be more “orderly”. Along with processes of self-organization, industrial will appi'oach the state of more orderly and steady, and constantly make industrial chain upgrade. Each firm or unit, who will gain the value, has to establish channels of value, which we called “industrial value chain”. Lastly,we discuss the consequence of vertical and orderly definition, which is exhibited by a certain relationship body. The typical forms of industrial chain include industrial cluster, strategy alliance and vertical integration etc.展开更多
It is a very important and complicated issue to choose and confirm technology schemes, which is also a complicated system engineering that has characteristics such as multi-factor, multi-level and multi-goal etc. So w...It is a very important and complicated issue to choose and confirm technology schemes, which is also a complicated system engineering that has characteristics such as multi-factor, multi-level and multi-goal etc. So we need to optimize and appraise it with the method of multi-goal and multi-principle. Based on discussing the relation between technology and economy, this paper puts forward the factors which should be considered to appraise technology schemes synthetically, thoughts and methods of variant value-weighted, and brings forward a new synthetical appraisal model which can appraise technology schemes objectively and comprehensively.展开更多
From a mathematical model of one kind complicated financial system, corresponding local topological structures of such kind system on condition of certain parametercombination, unstable equilibrium point of the system...From a mathematical model of one kind complicated financial system, corresponding local topological structures of such kind system on condition of certain parametercombination, unstable equilibrium point of the system, conditions on which Hopf bifurcation is created and stability of the limit circle corresponding to the Hopf bifurcation as well as condition on which the limit circle is stable have been studied. From relationship between each parameter and the Hopf bifurcation all the way to route which leads to chaos etc have been studied. Following the above, conditions on which complicated behaviors created locally in such kind system has been analyzed. By applying fractal dimension, Lyapunov index, the intrinsic complexity of the system on such condition has been studied, and result of the numerical simulation proves the theory of this paper correct.展开更多
文摘With its wide use in different fields, the problem of the convergence of simple genetic algorithms (GAs) has been concerned. In the past, the research on the convergence of GAs was based on Holland's model theorem. The diversity of the evolutionary population and the convergence of GAs are studied by using the concept of negentropy based on the discussion of the characteristic of GA. Some test functions are used to test the convergence of GAs, and good results have been obtained. It is shown that the global optimization may be obtained by selecting appropriate parameters of simple GAs if the evolution time is enough.
文摘In this paper, we begin with the swift changes in the knowledge economy time,analyze the implication of the agility, and consider the agile virtual enterprise as the mainorganizational form for the manufacturing enterprises to realize agility. We classify the agilevirtual enterprises into products alliance style and knowledge alliance style, and compares theirmain features and profit distribution models. As a result, we give four basic structures for thebuilding and running of the agile virtual enterprises.
基金Supported by the National Natural Science Foundation of China(No.70472080)and Shanghai Shuguang Planning Program(No.70472080).
文摘On the foundation of analyzing the closed loop logistics chain of product with multi-lifecycle, the connotation of environmental value is set forth, recurring to such conceptions as supply chain and value chain. The plotting rules about disassembly tree are discussed in detail. The reachable matrix R of components’ disas- sembly is introduced into distinguishing if disassembly is needed, in combination with disassembly-deciding vector X. Furthermore, the arithmetic of disassembly cost is put forward. And the cost-benefits of components’ reusing, materials’ recycling, safety disposing are dissertated based on the activity-based costing. Then the 0-1 goal-programming model on product recovery processing is established, with components’ demotion calculated. In addition, taking the PC’s recovery processing for example, we put it into application.
文摘Aerospace microelectronic technology has become the core competence of aerospace technology. For evaluating the aerospace microelectronic industry, it is necessary to change descriptive language of goal to quantitative index that can be measured. Knowing quantified goals or tree structure and array of general goal system, with certain algorithm and processing each corresponding list or array, we can bring out a quantified general goal value. The multi-objective (multi-attribute) evaluation method and the relevant weight sum algorithm have been adopted to quantitatively evaluate and forecast the developing state of the industry. A practical example illustrates that the applied decision technique and the algorithm are feasible and effective.
文摘The application of the optimal sinter burden design in the sinter shop of No.1 Iron-making Plant in Tangshan Iron & Steel Corp was reported. By using burden calculation andsimulating production under different situations, it is demonstrated that the technology can providethe relevant information in product quality and cost etc. for decision-makers. The technology hasbeen used to guide production of the Sinter Shop since 2000, and a remarkable achievement has beenobtained.
文摘目的系统评价儿童青少年继发性高血压的患病现状、病因构成及临床特征,为儿童青少年继发性高血压的鉴别诊断提供参考。方法检索中国知网、维普网、万方数据知识服务平台、Pub Med和Web of Science核心合集数据库建库至2024年6月发表的相关文献。采用meta分析综合评估儿童青少年继发性高血压的患病比例,并探讨其病因构成与临床特征。结果共纳入35篇文献,涉及8754例继发性高血压患儿。在临床高血压患儿中,继发性高血压占比为57.0%,肾性疾病为儿童青少年继发性高血压的首位病因(68.6%),其次为风湿免疫性疾病(10.9%)。年龄、继发性高血压家族史、蛋白尿和心电图改变是诊断儿童青少年继发性高血压的敏感指标。结论继发性高血压是临床中儿童青少年主要的高血压类型,肾性疾病居首位病因。年龄、继发性高血压家族史、蛋白尿和心电图改变可为继发性高血压的鉴别诊断提供线索。
文摘We put forward the credit targets sequences set and ordering structure of credit targets sequences and the dominance structure in credit targets sequences set. We also give a model to evaluate customer's credit by the deviation.
文摘Like value chain and supply chain, “industrial chain” becomes the focus of attention. The implication of “industrial chain” has gained a large range of extension. It not only expresses the industrial “chain” structure and relationship of “back and forward”in order or “up and down” in direction, but also it represents a cluster of large scale of firms in an area or colony. It is a network, or a community. Consequently, we conclude that “industrial chain” is a synthesis of industrial chain, industrial cluster, or industrial network.In this article, firstly we will distinguish industry chain from industry. An industry is the collection of firms that have the same attribute, so an industry can be defined by firm collection of certain attribute. We indicate that industrial chain is a kind of vertical and orderly industrial link. It is defined according to a series of specific product or service created. Secondly we analyze the vertical orderly defiinition process from the aspects of social division of labor and requirement division, self-organization system, and value analysis.Non-symmetry and depending on system or community of large scale of industrial units lead to entire industry to “orderly” structure. On the other hand, the draught of diversity and complexity of requirement simultaneously lead to entire industry to be more “orderly”. Along with processes of self-organization, industrial will appi'oach the state of more orderly and steady, and constantly make industrial chain upgrade. Each firm or unit, who will gain the value, has to establish channels of value, which we called “industrial value chain”. Lastly,we discuss the consequence of vertical and orderly definition, which is exhibited by a certain relationship body. The typical forms of industrial chain include industrial cluster, strategy alliance and vertical integration etc.
文摘It is a very important and complicated issue to choose and confirm technology schemes, which is also a complicated system engineering that has characteristics such as multi-factor, multi-level and multi-goal etc. So we need to optimize and appraise it with the method of multi-goal and multi-principle. Based on discussing the relation between technology and economy, this paper puts forward the factors which should be considered to appraise technology schemes synthetically, thoughts and methods of variant value-weighted, and brings forward a new synthetical appraisal model which can appraise technology schemes objectively and comprehensively.
文摘From a mathematical model of one kind complicated financial system, corresponding local topological structures of such kind system on condition of certain parametercombination, unstable equilibrium point of the system, conditions on which Hopf bifurcation is created and stability of the limit circle corresponding to the Hopf bifurcation as well as condition on which the limit circle is stable have been studied. From relationship between each parameter and the Hopf bifurcation all the way to route which leads to chaos etc have been studied. Following the above, conditions on which complicated behaviors created locally in such kind system has been analyzed. By applying fractal dimension, Lyapunov index, the intrinsic complexity of the system on such condition has been studied, and result of the numerical simulation proves the theory of this paper correct.
