The paper discussed the complex nature of development research on modern complex weaponry systems, scientific research engineering and specific complex environment engineering, and put forward general thinking to use method of systematicism (systematics) to research and deal with problems of complex nature.
In the 21st century the development of agriculture high and new technology will provide the chance for agricultural supply chain’s strategic reengineering. It can make agricultural supply chain highly stable, promote agricultural supply chain’s flexibility and time-based competitive ability, and notably improve integrated agricultural logistics and strongly support the basic competition strategy of agricultural supply chain and its high integration process.
In relation to the examples of memorial building in China and abroad, the article describes the historical evolution, type and characteristics of memorial building from the perspective of architectural philosophy. The article points out major problems in the design of memorial building in China. Mastering the intuition, experience, apriority and empathy of the architectural environment of memorial building is the key to the creation of memorial building.
Scientific and technological innovation plays an extremely important role in the development of the petroleum industry which is a capital-intensive, skill-intensive and talent-intensive trade. The historical evolution which is from nonexistence to existence, from backward in technique to technology ripe in the petroleum industry of China is closely linked to the progressive development of science and technology invariably. Technological innovation and theory break through play a key role in the development of petroleum industry. Among them, philosophy of science has important guiding functions to technological theories innovation. Based on some examples that petroleum industy technological and theory innovation set out, the guiding function Popper philosophy of science thought during the technological innovation.
The paper points out the background of the emergence of engineering philosophy, and describes the connotation of engineering philosophy and the significance for conducting the study on engineering philosophy.
The article reviewed the objective experience of petroleum prospecting and exploitation and the development of oil industry in China. It pointed out, with full historical materials, that Li Siguang made irreplaceable contribution to China's big discovery of petroleum.
In the project scheduling and management, the time-resource tradeoff problem is to seek the objective of minimizing the project duration and the total consumed-resources cost under the requirement of the absolute due date of project, and determine an efficient project scheduling according to some precedence relationship and the renewable resource constraints. A new multi-objective optimization decision-making model with time-resource tradeoff problem is proposed, in which objective functions with conflict one another are defined as adaptive and adjustable between the project duration and the total consumed-resources cost in all period. A satisfied feasible solution can be obtained in the solution procedure by compromising and adjusting relationship between the project duration and the total consumed-resource cost. A numerical example is illustrated. In addition, some characteristics on this two-player game are given in the corresponding Lagrangian relaxation form associated with the resource constraints.
The lack of data and availability is a major problem that embarrasses human reliability analysis (HRA) for a long time. In the course of Qinshan HRA, a full-size simulator was used to conduct an experiment on the operator’s reliability. It involves 3 cognition patterns including those of the skill-based, rule-based and knowledge-based and 23 abnormal events (55 His) which affect greatly the safety of power plant. The response time and conditions of 38 operators were recorded and kinescoped. 764 data points were resulted. All the data were analyzed and processed to develope HRA/HCR basic model parameter which matches with the features of Qinshan Nuclear Power Plant system and personnels. This paper introduces the background , theory, method, course, conclusion and their comparison with data obtained abroad.
An advanced matching technique for linear face class model is proposed, which can solve the problem of detailed controlling and robust iteration for the realistic facial modeling. A new method——Dynamic Gaussian Pyramid Analysis (DGPA), which combines Non-Uniform Sampling (NUS) method and Multi-Resolution Analysis, is presented. Integrating the PS Sampling and the Cluster Random Sampling, the distribution of the sampled points in each level images of the Gaussian pyramid is adjusted dynamically. In coarse-to-fine scheme, the minimization algorithm is used to compute the near global optimal solution that may fit to yield accurate model matching. Dynamic adjusting the boundary of the sampling cluster area and the resampling ratio, the detailed representations are effectively controlled, and the model creation is quite robust. An improved Stochastic Gradient Descent (SGD) algorithm based on the Correlative Disturbance (CD) and Adaptive Learning Rate (ALR) is exploited to accelerate iteration convergence and compute valid model parameters. With the examples of MPI Caucasian Face and AI&R Asian Face databases, experimental results in subjective evaluation and objective evaluation demonstrate the advanced model matching technique.
Aimed at the severe problems in tokens and computations of grey numbers, which expanded unnecessarily and distorted the information heavily, this paper defined the standard interval grey number and the first and the second standard grey number, and analyzed their relationship. Furthermore, it designed the transformation rule from general grey number to the standard interval grey number, and developed the operation principle of the standard interval grey number to solve preferably the above problems. Last, the paper established the GM (1,1) model based on the interval grey number and got a good effect.
Backward recurrent method is usually adopted in seeking optimal solution by dynamic programming. A forward recurrent method to find optimal solution by dynamic programming is presented on the basis of an instance. The fundamental equation of dynamic programming and Millton-Jacobi's equation are also derived. It's an exploratory study on optimal solution of dynamic programming. An amount of work is reduced in calculating by using forward recurrent method, while applied range of the method is expanded.
The article divides the whole section into two sections. One is arcuate section. The other is seepage section. Water velocity distribution in circular section of pipe has been studied for a long time, and advanced theories were achieved. Based on fore theory and some tentatives, theory about distribution of water velocity in pipe of arcuate section is researched. Research of seepage section is based on seeping theory. Many experiments proved that the theory and program of this article are correct.
Based on the decision character of the dynamic multiple-attribute system, in initializing the attribute data, a new linear changing operator in [-1,1], which is easy to compute and be applied, is proposed. By this method to find the positive and negative ideal precept of each period, a new grey incidence decision model of the dynamic multi-attribute is establishod. In this model, the developing character of each attribute in the system is fully consider, and applied to grey incidence analysis. All of the above provide a scientific and applied decision method for the dynamic multiple - attribute decision problems. Lastly, this method is demonstrated to be scientific and effective with a practical example.
Temperature prediction on-line for sun synchronous satellite is very essential. In this paper, satellite's temperature is predicted on-line after the analysis to the cycles of orbital external thermal current and average temperature. Temperature distribution predicted by last two circles can be the basis on thermal fault diagnosis for satellites. Meanwhile the error accumulation can be avoided. Fly experiment data show that the method is reliable.
Several life management methods of helicopter dynamic components were discussed, such as safe-life method, flaw-tolerance method, damage-tolerance method and fault-tolerance method. The origin and the current status about damage-tolerance method in life management both at home and abroad were presented. In comparison with the fixed wing aircraft, three main aspects, which can make the damage tolerance approach very difficult to apply in practice to every helicopter dynamic components, were discussed. Several key technical settlements when damage tolerance method was put in practice in life management of helicopter dynamic components were expounded emphatically. Finally, future needs for research were highlighted.
In order to study durability, crack controlling of concrete structures and characteristics of concrete at early age in simulated environment, environmental simulation test technology is discussed. This paper describes the successful applications of environmental simulation technique in some fields. The key techniques of environmental test of concrete structures are analyzed. The basic scheme is put forward to construct artificial climatic environmental laboratory with autocontrol and multifunction. Then the layout, function and performance of the lab is determined suitably. Finally, the equipments and instruments of the lab are discussed. Based on the research, environmental test of concrete durability and crack controlling will be better performed in the future.
In view of the traditional design concept, the main aim of which is to satisfy the mine machine's function, this article brings forward a new design idea which is based on ergonomics and satisfies consumers including drivers and riders, as well as all person in its working environment. Based on the example of a hydraulic winder, the outward appearance, yawp debasing, operating and controlling system, security and riding comfortableness are all analysed in the paper.
A series of simulation experiments, carried out on the scale model of subway station passageway are described, in which wood crib fires are used as the evolvement process of subway fire. Temperature relative value is provided to analyze the law of smoke temperature along the station passageway in subway fire and its affecting factors. Based on images collected, the conditions needful for coming into being smoke layer and the applicability of zone model are discussed in the investigation of smoke properties in subway fire. Otherwise, it is also indicated from the results of smoke component measurements that CO concentration at the exit rises with stepwise change.