As they provide the superiorities of the peak clipping and valley filling, the running stability of all the power units and the quality of the electricity of the power grid may be refined. It is notable that as a large amount of the discharging harmful gas CO2 etc. will be reduced, it is very favorable to the ecological environment and retainable development.
This paper presents general design frame for Weather Hazards Warning Information Broadcasting System based on Digital Audio Broadcasting technology and provides a digital format of Weather Warning message encoding by conducting research on weather hazards warning message encoding. With the Broadcasting System of Weather Hazards Warning Information, all weather hazard information can be effectively disseminated in the shortest time to the specific areas, departments and people. What's more, Warning Information can cover all our country,effectively solving "the last mile" issue of weather warning information broadcasting.
Complex spatial-temporal dissipative structures occur in shocked porous material. The system is globally in nonequilibrium. Both the simulation and data analysis for such a system are challenging.The system was simulated by using the material-point method which was developed recently. The Minkowski functionals were introduced to describe the Turing pattern of the map of state variable like temperature.The relevance among the three Minkowski functionals,the area fraction of the high-temperature regions and the distribution of "hot-spots" in space was pointed out.The shock wave reaction with inhomogeneous material was studied by analyzing the evolution of Minkowski functionals. The effects of porosity and shock-wave-strength were investigated.
This paper elaborates on the significance, description parameters, evaluation methods, and implementation ways of the lightweighting of automobile. Lightweighting design, the relationship between the performances of auto parts & components and the property parameters of materials, and the application of advanced forming technique are also elaborated. According to recently related progress of lightweighting and author's working, lightweighting of automobile are comprehensively and systematically overviewed.
This article intends to give a systematic review of three sediment pollution control techniques, that is environmental dredging technology, in-situ capping technology, and in-situ inactivation technology, which have been applied successfully in many cases home and abroad. Through a detailed summary, the three techniques have been clearly displayed about the characteristics, main technical processes, primary environment problems during construction and application status, etc. On comparision of advantages and disadvantages of the three techniques, environmental dredging technology is recommended to apply to economy relatively advanced area with heavily sediment polluted lake bay or river mouth. In-situ capping technology is applicable for moderate-deep lakes and rivers, while in-situ inactivation technology is applicable for non-drinking function lakes with weak wave disturbance. The application foreground of the three techniques in sediment pollution control in Chinese lakes is also prospected.
It's difficult to leach ITO feed solution and effectively recycle indium and tin. The problems can be solved by treating ITO waste with sulphuric acid and hydrochloric acid leaching-sulfide precipitation.
The achievements of the optically pumped XeF(C-A) laser technology in Northwest Institute of Nuclear Technology have been summarized. An optically pumped XeF(C-A) laser with 0.1~1 Hz pulse-repetition mode is developed. The maximum output energy is up to 18.7 J, which corresponds to the conversion efficiency of the stored electrical energy to the laser output energy of 0.25 %. To our knowledge, it is the first report on a photolytically pumped XeF(C-A) laser with repetition mode and the conversion efficiency is the highest. The structure of the optical pumping source with sectioned surface discharge and the device of the mixture gases generator are described. The latest development of the high repetition rate optical pumping source and compressing laser spectrum linewidth are discussed. The maximum pulse repetition rate of the new optical pumping source is up to 90 Hz. The XeF(C-A) laser spectrum linewidth is compressed less than 1 nm.
Visualization technique confronts great challenges raised by large-scale and comprehensive engineering numerical simulation. Key research problems such as visualization expression, algorithm optimization and integrated solving framework are paid more attention to, current developments in and outside China are introduced and discussed. It is concluded that communication with application fields should be attached more importance to development of visualization technique.
Based on the theory of particle field holography, a set of corresponding pulsed holographic diagnostic system was developed, on which series of experiments were carried out. In this paper, the measuring principle of ejected particles shocked by explosive is analyzed simply, the assemblies of the diagnostic system and their functions are described, and the experiment results obtained with the system are showed. The results show that the system can realize the three-dimensional diagnosis of high-speed particles and meet the requirements of actual needs. Meanwhile, the developing direction of the application and the limitation of the system are pointed out.
This paper expounds the superiority of adopting four-step operational mode for TGP lock under impounded level 156 m in the finishing construction period, and demonstrates the feasibility of adopting four-step operational mode with the hydraulic conditions. After adopting the optimizing water conveyance pattern by means of prototype debug, the cavitation of the 1st-bifurcation at mid chamber has been basically eliminated, the working conditions of the lock under exceeding design water head 45.2 m has been confirmed well, therefore, the four-step operational mode can be adopted for TGP lock.
The fossil fuel power plant consumed resources and discharged pollutants, of which the level not only connected with existence and development of projects themselves, but also affected the implement of energy conservation and emission reduction of the whole power industry, and held together the realization of the total target of general economical and social development of the country. Along with the sustainable development concept constantly deepening, green construction and green design techniques were widely adopted and applied. The green design technology were carried in the schematic design process of power plant, modular combination design was adopted, facility and function subsystem was optimized, new technique and new technology and new material were selected, effective water-saving measures were taken, optimized scheme of control system was put in practice, so the power plant could carry out sustainable development of itself, moreover acquire favorable economic and social and environmental benefits. The thesis aims to provide some beneficial experience accumulation for green design of the power plant based on preliminary study.
A method for finding the most vital edge based on the characteristic of network communication is proposed. The link importance is determined by its using frequency in all-pairs shortest paths and the most vital edge results in the highest frequency. Without the commonly used edge-deletion and edge-contraction methods, the proposed algorithm directly reflects the edge's contribution to the network communication and the relative importance of the two edges in the network can be evaluated. The algorithm analyses and the experimental results show that this algorithm overcomes the currently existent problems and provides a more reasonable principle for ranking edges which is consistent with our intuitive judgments.
Development and application of pseudo-random code combined fuze can be guided in theory by researching its anti-jamming performance. The anti-noise FM jamming performance of pseudo-random code phase modulation and sine FM combined fuze is analyzed based on the criterion of signal to jamming ratioin (SJR) gain in this paper. First, the principle of the combined fuze was introduced, and its overall SJR gain is reduced in detail under the noise FM jamming, then, the factors affecting its anti-noise FM jamming performance were analyzed, such as the nth order Bessel function of the first kind, Doppler frequency, pseudo-random code period, pulse width, and spot error. The results provide the important theoretic foundation for the improvement on anti-noise FM jamming performance of the combined fuze. At the same time, the studying method put forward in this paper may be used as the reference for analyzing anti-jamming performance of other type of fuzes.
The scale and complexity of search space are important factors to decide the solving difficulty of an optimization problem. The information of solution space may lead searching to optimal solutions. Based on the known space structure of job shop scheduling problem, a space contracting and decomposing algorithm is proposed. This algorithm makes use of the good solutions found by searching algorithms, contracts the search space and decomposes it into one or several optimal regions combined with the concept of Backbone of combinatorial optimization solutions. And optimization of small-scale problems is carried out in optimal regions. Statistical analysis is not necessary before or through solving in this algorithm, and solution information is used to estimate the landscape of search space, which enhances the speed and solution quality. The experiments results testify the efficiency of this new algorithm.
The coal resources in China are mainly distributed in northwest parts, especially in Shanxi Province, north part of Shanxi Province and west part of Inner Mongolia, while the areas which consume coals most are the north and central south parts, thus the pattern of transporting coals in north to south and transporting coals in west to east comes into being. Coal transportation has been being the key point of railway transportation for a long time. Strengthening the railway construction for coal transportation to ensure safe and steady coal supply is significant to the safety of national energy strategy.
Based on the chassis of a car, a multi-body dynamics model was built with ADAMS software. With the objective evaluation index for maneuverability of vehicle, ADAMS function was built to evaluate vehicle maneuverability. Orthogonal optimization design was applied to optimizing vehicle maneuverability with ADAMS software. The applying virtual prototyping technology for vehicle maneuverability and structure orthogonal optimization not only increases accuracy of simulation model compared with lumped-mass model, but also finds the main factors influencing the vehicle maneuverability and gets the optimization levels of the influence factors. The design process can be used in industrial organization.
The promotion of national emergency platform on the construction is the technical basis to strengthen emergency management. At present, it is the core mission. In recent years, national emergency platform has made rapid progress.However, there are still some problems; this article raises a series of recommendations about ways to improve the construction of the national emergency platform on the basis of the comprehensive analysis.
The coal and gas outburst is a dynamic pheaomenon in the underground exploitation of coal mine,and the strong dynamic effect can result in damage of belongs and death of workers of coal mine. Therefore,it is very important to advance coal industry healthy and continual in forecast the area of coal and gas outburst reasonablely.This paper aimed at the defect that neural network is easy to fall into some extremely local smallness and cause the unreasonable distribution of the weight value of the forecast indexes,ade the area forecast model of the coal and gas outburst was established based on coupling of the neural network and the genetic algorithm according to the natural conditions and the characteristics of the geologic structure. The coupling forecast model was validated with the practical example.The study results has proved the validity of the model, and laid the foundation of the area forecast of the coal and gas outburst based on coupling of the neural network and genetic algorithm.