In this paper, a novel interferometric method with a wide range of sensitivities, called holography quasi projection moire, is proposed. It combines the features of the variated double projection moire method and the ...In this paper, a novel interferometric method with a wide range of sensitivities, called holography quasi projection moire, is proposed. It combines the features of the variated double projection moire method and the holographic interferometry method. This technique is used to study the failure modes of microelectronic packaging modules.展开更多
An adaptive fuzzy sliding mode strategy is developed for the generalized projective synchronization of a fractional- order chaotic system, where the slave system is not necessarily known in advance. Based on the desig...An adaptive fuzzy sliding mode strategy is developed for the generalized projective synchronization of a fractional- order chaotic system, where the slave system is not necessarily known in advance. Based on the designed adaptive update laws and the linear feedback method, the adaptive fuzzy sliding controllers are proposed via the fuzzy design, and the strength of the designed controllers can he adaptively adjusted according to the external disturbances. Based on the Lya- punov stability theorem, the stability and the robustness of the controlled system are proved theoretically. Numerical simu- lations further support the theoretical results of the paper and demonstrate the efficiency of the proposed method. Moreover, it is revealed that the proposed method allows us to manipulate arbitrarily the response dynamics of the slave system by adjusting the desired scaling factor λi and the desired translating factor ηi, which may be used in a channel-independent chaotic secure communication.展开更多
A memetic algorithm （MA） for a multi-mode resourceconstrained project scheduling problem （MRCPSP） is proposed. We use a new fitness function and two very effective local search procedures in the proposed MA. The f...A memetic algorithm （MA） for a multi-mode resourceconstrained project scheduling problem （MRCPSP） is proposed. We use a new fitness function and two very effective local search procedures in the proposed MA. The fitness function makes use of a mechanism called ＂strategic oscillation＂ to make the search process have a higher probability to visit solutions around a ＂feasible boundary＂. One of the local search procedures aims at improving the lower bound of project makespan to be less than a known upper bound, and another aims at improving a solution of an MRCPSP instance accepting infeasible solutions based on the new fitness function in the search process. A detailed computational experiment is set up using instances from the problem instance library PSPLIB. Computational results show that the proposed MA is very competitive with the state-of-the-art algorithms. The MA obtains improved solutions for one instance of set J30.展开更多
The Three Gorges Project (TGP) is the largest concrete structure in the world to this day. The project, with a total amount of approximately 28 million m 3 of concrete, is characterized by complicated structures, inte...The Three Gorges Project (TGP) is the largest concrete structure in the world to this day. The project, with a total amount of approximately 28 million m 3 of concrete, is characterized by complicated structures, intensive construction and high technical standards, which should not only meet the requirements of stability but of special flood releasing, power generation and navigation improvement. Through a decade of engineering practice, a management mode that embodies the characteristics of TGP under construction has been formed. Various new techniques and technologies have been used to ensure the concrete quality. Design, construction and management measures adopted for the concrete works of the project are discussed in this article on an overall basis.展开更多
Firstly,relying on the science and technology project of high yield in Hebei Province,connotation of agricultural technology demonstration and extension mode and the high yield grain project in Hebei Province is intro...Firstly,relying on the science and technology project of high yield in Hebei Province,connotation of agricultural technology demonstration and extension mode and the high yield grain project in Hebei Province is introduced.Extension mode of agricultural technology demonstration and radiation is constructed.Agricultural technology demonstration and radiation mode includes the radiation center,primary irradiation and secondary irradiation.Secondly,management system and operational mechanism of agricultural technology demonstration and radiation mode are discussed,mainly expressed in establishing leading group in each demonstration county(city),carrying out leader contract responsibility system,establishing expert advisor steering group and setting up core experts group for subject,establishing technical experts group for subject,setting up leading group in the radiation area,carrying out chief expert responsibility system and technician matrix responsibility system,establishing the operating mechanism of "open,flow,competition and collaboration" with "test area-expert two-way selection" as the core content.Finally,countermeasures to improve the agricultural technology demonstration and radiation mode is put forward,such as establishing the rural technology demonstration base,strengthening cooperation with enterprises,and adopting flexible technical training,so as to promote the spread of agricultural high-tech,to increase the contribution rate of agricultural technology,and to offer ideas for agricultural technology extension model at the new era.展开更多
为了提高绿色建筑施工管理的智能化水平,系统阐述绿色建筑内涵及建筑信息模型(Building Information Modeling,BIM)技术的核心特征,构建基于BIM的施工现场信息管理系统,融合客户端/服务器(Client/Server,C/S)与浏览器/服务器(Browser/Se...为了提高绿色建筑施工管理的智能化水平,系统阐述绿色建筑内涵及建筑信息模型(Building Information Modeling,BIM)技术的核心特征,构建基于BIM的施工现场信息管理系统,融合客户端/服务器(Client/Server,C/S)与浏览器/服务器(Browser/Server,B/S)双模架构,设计多层次逻辑框架,通过德尔菲法,邀请8位专家对智能施工技术应用进行权重评估。结果显示,运维管理在一级指标中权重最高,运维平台安全性为关键二级指标。进一步分析BIM在空间规划、施工疏散模拟中的实践路径,为绿色建筑智能建造提供理论支撑。展开更多
堤防工程施工管理存在多专业协调困难、进度控制不精准、质量管控手段单一等问题。构建了基于建筑信息模型(building information modeling,BIM)技术的堤防工程施工技术管理创新模式,通过三维建模、四维(4-dimensional,4D)施工模拟、多...堤防工程施工管理存在多专业协调困难、进度控制不精准、质量管控手段单一等问题。构建了基于建筑信息模型(building information modeling,BIM)技术的堤防工程施工技术管理创新模式,通过三维建模、四维(4-dimensional,4D)施工模拟、多专业协同平台,实现施工全过程精细化管控。以大湾区堤防巩固提升工程(中山段)为例,建立BIM施工管理平台,集成进度管理、质量监控、成本控制功能模块。应用结果显示,施工效率提升28%,工期缩短15%,质量问题减少35%,验证了该管理模式的有效性和实用性。展开更多
基金The project supported by the National Natural Science Foundation of China
文摘In this paper, a novel interferometric method with a wide range of sensitivities, called holography quasi projection moire, is proposed. It combines the features of the variated double projection moire method and the holographic interferometry method. This technique is used to study the failure modes of microelectronic packaging modules.
基金Project supported by the Research Foundation of Education Bureau of Hebei Province,China(Grant No.QN2014096)
文摘An adaptive fuzzy sliding mode strategy is developed for the generalized projective synchronization of a fractional- order chaotic system, where the slave system is not necessarily known in advance. Based on the designed adaptive update laws and the linear feedback method, the adaptive fuzzy sliding controllers are proposed via the fuzzy design, and the strength of the designed controllers can he adaptively adjusted according to the external disturbances. Based on the Lya- punov stability theorem, the stability and the robustness of the controlled system are proved theoretically. Numerical simu- lations further support the theoretical results of the paper and demonstrate the efficiency of the proposed method. Moreover, it is revealed that the proposed method allows us to manipulate arbitrarily the response dynamics of the slave system by adjusting the desired scaling factor λi and the desired translating factor ηi, which may be used in a channel-independent chaotic secure communication.
基金supported by the National Natural Science Foundation of China(71171038)
文摘A memetic algorithm （MA） for a multi-mode resourceconstrained project scheduling problem （MRCPSP） is proposed. We use a new fitness function and two very effective local search procedures in the proposed MA. The fitness function makes use of a mechanism called ＂strategic oscillation＂ to make the search process have a higher probability to visit solutions around a ＂feasible boundary＂. One of the local search procedures aims at improving the lower bound of project makespan to be less than a known upper bound, and another aims at improving a solution of an MRCPSP instance accepting infeasible solutions based on the new fitness function in the search process. A detailed computational experiment is set up using instances from the problem instance library PSPLIB. Computational results show that the proposed MA is very competitive with the state-of-the-art algorithms. The MA obtains improved solutions for one instance of set J30.
文摘The Three Gorges Project (TGP) is the largest concrete structure in the world to this day. The project, with a total amount of approximately 28 million m 3 of concrete, is characterized by complicated structures, intensive construction and high technical standards, which should not only meet the requirements of stability but of special flood releasing, power generation and navigation improvement. Through a decade of engineering practice, a management mode that embodies the characteristics of TGP under construction has been formed. Various new techniques and technologies have been used to ensure the concrete quality. Design, construction and management measures adopted for the concrete works of the project are discussed in this article on an overall basis.
基金Supported by the State Grain High Yield Science and Technology Project in Hebei Province of Eleventh Five-Year Plan(2006BAD02A08-5-1)
文摘Firstly,relying on the science and technology project of high yield in Hebei Province,connotation of agricultural technology demonstration and extension mode and the high yield grain project in Hebei Province is introduced.Extension mode of agricultural technology demonstration and radiation is constructed.Agricultural technology demonstration and radiation mode includes the radiation center,primary irradiation and secondary irradiation.Secondly,management system and operational mechanism of agricultural technology demonstration and radiation mode are discussed,mainly expressed in establishing leading group in each demonstration county(city),carrying out leader contract responsibility system,establishing expert advisor steering group and setting up core experts group for subject,establishing technical experts group for subject,setting up leading group in the radiation area,carrying out chief expert responsibility system and technician matrix responsibility system,establishing the operating mechanism of "open,flow,competition and collaboration" with "test area-expert two-way selection" as the core content.Finally,countermeasures to improve the agricultural technology demonstration and radiation mode is put forward,such as establishing the rural technology demonstration base,strengthening cooperation with enterprises,and adopting flexible technical training,so as to promote the spread of agricultural high-tech,to increase the contribution rate of agricultural technology,and to offer ideas for agricultural technology extension model at the new era.
文摘为了提高绿色建筑施工管理的智能化水平,系统阐述绿色建筑内涵及建筑信息模型(Building Information Modeling,BIM)技术的核心特征,构建基于BIM的施工现场信息管理系统,融合客户端/服务器(Client/Server,C/S)与浏览器/服务器(Browser/Server,B/S)双模架构,设计多层次逻辑框架,通过德尔菲法,邀请8位专家对智能施工技术应用进行权重评估。结果显示,运维管理在一级指标中权重最高,运维平台安全性为关键二级指标。进一步分析BIM在空间规划、施工疏散模拟中的实践路径,为绿色建筑智能建造提供理论支撑。
文摘堤防工程施工管理存在多专业协调困难、进度控制不精准、质量管控手段单一等问题。构建了基于建筑信息模型(building information modeling,BIM)技术的堤防工程施工技术管理创新模式,通过三维建模、四维(4-dimensional,4D)施工模拟、多专业协同平台,实现施工全过程精细化管控。以大湾区堤防巩固提升工程(中山段)为例,建立BIM施工管理平台,集成进度管理、质量监控、成本控制功能模块。应用结果显示,施工效率提升28%,工期缩短15%,质量问题减少35%,验证了该管理模式的有效性和实用性。
