Papers by Keyword: Economy

Abstract: The service environment of Yanchang oilfield was researched. The corrosion environment of the oil and gas area of Yanchang group is different, the summer rainstorm is frequent and the landslide debris flow is easy to occur. The theoretical analysis and pilot test of pipeline performance have been carried out. We suggest that the steel pipeline, t FRP pipeline and the flexible composite pipe for high pressure transmission can be used in Yanchang group. The combined application strategy of steel pipeline, FRP pipeline and flexible composite pipe for high pressure transmission was proposed and verified. The results show that the combined application strategy effectively slows down the pipeline corrosion problem, reduces pipeline leakage accidents caused by accidental landslides, and reduces environmental pollution accidents caused by accidents such as pipeline corrosion and leakage. The tracking and analysis of pipeline combined application strategy for up to 5 years, the results show that the pipeline combined application strategy is more economical. It is concluded that the combined application strategy of steel pipelines, FRP pipelines and Flexible Composite Pipe for High Pressure Transmissions can ensure smooth operation of pipelines and save costs in the development of oil and gas fields, and it is recommended to popularize.

Abstract: In the paper were analyzed main statistical characteristics of foreign trade for metal-processing industry in Serbia in period of 2008-2014. In order to convey a more comprehensive overview of tendencies as well as changes that appeared in frame of foreign trade we analyzed the dynamics and structure of export and import of individual products and product purpose. Analysis shows that during the observed period some of the trade indicators have improved but the main problems still remain such as high level of deficit and unsatisfactory export structure.

Abstract: To summarize the feasibility, science and economy of the multi-ribbed floor structure in one basement engineering, its design theory, technical economic and construction technology are analyzed in detail.

Abstract: RPC(Reactive Powder Concrete) is a kind of high performance concrete which has many excellent mechanical properties, e.g. ultra-high-strength, high tenacity and good durability, and it has been applied in engineering practice. However, at present the economic research about RPC bridge is few at home and abroad, which has hindered the development of RPC bridge to some extent. By means of the mechanical analysis and economic research about NC(normal concrete ) beam bridge of pre-stressed steel strand (the span is 40m), RPC beam bridge of pre-stressed steel strand and RPC beam bridge of pre-stressed CFRP(Carbon Fiber Reinforced Polymer) tendon after the sectional optimization has been done, this paper reach the conclusion that the RPC beam bridge can greatly reduce the sectional size of beam bridge and reduce the weight by 23.7% , besides, the total cost of RPC beam bridge of pre-stressed steel strand is almost same with the total cost of NC beam bridge during the entire service period of bridge. Therefore, considering the long-term perspective, the integrated economy of RPC beam bridge of pre-stressed steel strand is good.

Abstract: The principle of domestic seawater technology is to replace fresh water by seawater. This paper introduces the features and demonstration scale of domestic seawater technology. Considering the successful seawater toilet-flushing in Hong Kong, comparison and economic analysis on the cases of seawater, recycled water and tap water are done. The result shows domestic seawater technology is an economical and efficient water saving technology.

Abstract: s: According to the design requirements of pure electric light off-road vehicle in the initial stage of development, parameter values of the main parts of the vehicle drive system are selected after theoretical calculation. With the vehicle modeling and its performance simulation on the Cruise software, indicators of its dynamics and economic performance are got and the results are compared to the design requirements, which verified the feasibility of Cruise software application in the electric vehicle drive system development.

Abstract: Pursuant to the statistics data of Eurostat, the economy of European Union is slowly recovering from year lasting recession. The gross domestic product volume increased in 2^nd quarter of the year 2013 by 0.3%. The industrial companies in EU are nevertheless facing still increasing competitiveness as the European and global markets are developing under current business conditions. To be successful within the frame of current supply chains the companies must have well-developed logistics management systems to effectively treat with flows streaming in their inner or outer supply chains. One of the main elements of company logistics management systems is inventory management subsystem to plan, to manage and to control particular stock items. In the paper it is briefly described the methodics to design effective inventory management system whether in industrial or service company.

Abstract: With the growing renewable resources such as wind and light accessing to grid，the existing regulation and control means face threats and challenges as a result of the change of grid architecture. The distributed energy coordination scheduling system is proposed to use the various resources of intelligent distribution network platform synergistically and complementary. This paper introduces the construction idea，main module and function implement of this system. According to the benefit analysis, this system is proved to improve the reliability and economy of grid operation under the widespread accessing to distributed resources.

Abstract: In many economically developed countries, the logistics industry occupy a dominant position in the economic market. The development space is constantly expanding, using the traditional algorithms to analyze the economic impact of logistics factors model was conservative, which does not have a high accuracy and hence affects the efficiency of modeling. According to this problem, logistics factors impact on the economic analysis modelling based on the gravity model was proposed. Based on the difference between logistics relationship, the GOP value of the economic partnership, the distance between each other and economic policy of logistics factors such as material space efficiency and time efficiency, the economic impact of logistics factors is analyzed. Experiments prove that using the method of gravity model is established for logistics analysis of the factors that affect the economy, high accuracy rate and reliability.

Abstract: The problems of ore mill tailings disposals and eco-economic efficiency of their use are considered. The paper provides the fundamentals of geo-mechanical control of the rock mass by low-strength solidifying mixtures of recyclable tailings. The essence and results of mechanochemical experiments on non-ferrous, ferrous metals and coal tailings are considered. A model to determine the economic and environmental efficiency of this technology is developed.