Papers by Keyword: Contrastive Analysis

Abstract: Golog Tibetan Autonomous Prefecture is located in the hinterland of the Qinghai-Tibet Plateau, located in the southeast of Qinghai Province. And the unique geographical, climatic and economic conditions created a unique local houses - Tibetan Diaolou. Tibetan houses in Golog most used local materials and were made of stone, wood, soil, grass, rattan and other natural materials. The Tibetan Diaolou are assembled by flagstone to form a load-bearing structure of stone walls and wooden. The towers mainly distribute in Yaertang Xiang and Dengta Township which are located in the coastal of Make River. Through field investigation of two rural villages, this article has a deep understanding of the structure performance of Tibetan Diaolou. This paper analyzes its structural problems of safety and seismic performance, trying to improve the seismic performance of Tibetan Diaolou.

Abstract: In the process of long-term storage, the equipment would happen storage environment contaminated corrosion, mechanical structure stress corrosion damage. Currently,the corrosion fatigue damage prediction accuracy of method was low. Different kernel functions were adopted by this paper to compare based on least squares support vector machine (LSSVM). Besides, comparison was made among the BP neural network method, Standard Support Vector Machines (SVM), Grey System Prediction model Method and the radial basis function kernel least squares support vector machine (RBF_LSSVM) method by the simulation experiment. The optimal results finally were applied to practical engineering. The results showed that high accuracy and performance could be gained by employing the RBF_LSSVM method for predicting the trends of the mechanical structure rivet corrosion.

Abstract: Taking household heating for an example, this paper has introduced the composition and characteristics of combined heating system with condensing wall-mounted boiler and solar water heater; and through the simple contrastive analysis of the economy and environmental protection with the solar heating system assisted by electric heating and wall-mounted gas heater, it is believed that the heating system combined with condensing gas heater and solar heating is the better choice of household heating considering its energy saving, economy and environmental protection.

Abstract: Wind power is an important type of renewable energy sources. In this passage we will apply Life Cycle Assessment (LCA) to analyze the four stages of wind power generation,which are production of raw materials, transportation, build-operate process of wind plants and demolition stages, calculate the energy consumption and the environmental impact, set a contrastive analysis between coal-fired power plants and wind power plants. We will take WangHaiSi Wind Plant in Faku, Shenyang as an example to show the difference between the two ways of getting power. The analysis shows that: in comparison with coal-fired generation, wind power generation saves more energy and reduces emissions of pollutants markedly; the main energy consumption comes from production of raw materials, which takes 79.3% of the total energy consumption throughout the life cycle. In the meantime, the large amount of ecological resources consumption from construction, operation and maintenance of wind plants leads to mass emission of carbon dioxide and sulfur dioxide, which respectively take 67.3% and 96.6% of total emissions. Besides, wind generation only accounts for 0.93%, 0.89% and 2.72% of energy consumption, global warming potential (GWP) and acid potential (AP) of coal-fired power generation. Thus, it proved that wind power generation has lesser impacts on environment than coal-fired power generation. However, it is still of great necessity to strengthen the environmental protection measures to reduce the consumption and destroy of ecologic resources.

Abstract: Wind power is an important type of renewable energy sources. In this passage we will apply Life Cycle Assessment to analyze the four stages of wind power generation，which are production of raw materials, transportation, build-operate process of wind plants and demolition stages, calculate the energy consumption and the environmental impact, set a contrastive analysis between coal-fired power plants and wind power plants. We will take WangHaiSi Wind Plant in Faku, Shenyang as an example to show the difference between the two ways of getting power. The analysis shows that: in comparison with coal-fired generation, wind power generation saves more energy and reduces emissions of pollutants markedly; the main energy consumption comes from production of raw materials, which takes 79.3% of the total energy consumption throughout the life cycle. In the meantime, the large amount of ecological resources consumption from construction, operation and maintenance of wind plants leads to mass emission of carbon dioxide and sulfur dioxide, which respectively take 67.3% and 96.6% of total emissions. Besides, wind generation only accounts for 0.93%, 0.89% and 2.72% of energy consumption, global warming potential (GWP) and acid potential (AP) of coal-fired power generation. Thus, it proved that wind power generation has lesser impacts on environment than coal-fired power generation. However, it is still of great necessity to strengthen the environmental protection measures to reduce the consumption and destroy of ecologic resources.

Abstract: A macroscopic finite element model and a microscopic one were set up respectively to simulate SRC frame with two bays and three stories under cyclic loading, by comparing the simulation and test results, the authors find that the results obtained from the two finite methods have few differences, and each of them can satisfy the demands of engineering, but the principles established in simulation process were different. The macroscopic finite element model was established by very few elements and the results data were obtained easily and quickly, however, it just attain some macroscopic mechanics data (axial force, bending moment and shearing force etc.). The microscopic finite element model involves complex modeling principle, not only needs more time for dealing with the geometry model, gridding and boundary conditions and so on, but also limited by professional knowledge, which make users establish a correct model hardly. The comparison shows that macroscopic finite element method has many advantages in engineering fields.