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ZHANG Zhi-liao 《保鲜与加工》2005,(8):149-153
Migration for the reason of zoological environment is the measure for solving the crisis of zoological environment. Nowadays, governments play the chief role in the Migration for the reason of zoological environment, but the migration themselves do not have the freedom to decide whether migrate or not. Because the activity of migration is related to the restraint of economy, culture, law, etc. It is the object of migration that protect the zoological environment and improve the welfare of habitant, which must be concerned when constructing the systems of migration. This paper proves the possibility of contracting for migration based on the methodology of the cost-income analysis. On the other hand, it also argues for changing the mode of migration from that controlled by governments to being decided by habitant themselves. 相似文献
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Membrane Bioreactor (MBR) is a new technology in wastewater treatment, using membrane to enhance biological-chemical reaction. It has many advantages such as high efficiency and low sludge production rate. By analyzing the factor influencing MBR, a new submerged hybrid dynamic membrane bioreactor(HDMBR) is suggested and the characteristics of the new HDMBR from different viewpoints are expounded. It shows that this technology is a process of high efficiency and low consumption. 相似文献
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The building energy consumption is one of the major problems concerned by all the countries in the world. In the integral building systems,the consumption of the HVAV systems is more than 35 percent of the total building consumption. So it is important to study the strategies of energy_saving for air_conditioning systems. This paper explains some efficient and energy_saving HVAC systems, such as ice_storage air_conditioning system and underfloor air_conditioning system,and presents the strategies to accomplish the energy_saving purpose by using materials of energy_saving for enclosure structure and proper control systems. Some problems on the conservation of design and the difficulties in practical operation of energy_saving air_conditioning systems in exiting are discussed. 相似文献
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In the new environment, product development is the core of product innovation and quickly responsive to the market for the enterprises. The speed and effectiveness of development is the key factor to the success of product development. The design for business is the key technique in achieving the effectiveness of product development. And manufacturing system is the bridge between business and products. The design method of facing business is discussed, and the design flow and content of manufacturing system supporting facing business are pointed out. At the same time, the author also sets forth the construction definition, the construction design and the detailed design of the manufacturing system. So the design flow of manufacturing system facing business is established. 相似文献
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In order to fulfill the landfill gas's energizing and protect the environment, many measures to control and exploit the landfill gas are taken. In this paper, a targets system and an analytic hierarchy process method which assesses the measures are put forward based on the systematic impact of environmental,economical and social benefits. It is useful to make a decision reasonably. 相似文献
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Based on the analysis of experimental model, the vibrating experiment was made for the frame and engine of motorcycle in order to find the resonance frequency of the frame. Then the effect of engine exciting on the body vibration was analyzed, so that the mode frequency avoids the range of engine rotation speed. The experiment results show that the vibration of the saddle in vertical direction and the handlebar are caused by the resonance, while the vibrations of the other two directions of saddle and the pedal are the result of the transmission of engine energy. In order to decrease the transmission of the engine energy to pedals, we can change the stiff welding between the pedals and the frame of the motorcycle into the elastic link. Furthermore, to avoid the resonance of the frame in vertical direction, besides increase the stiffness of the frame, we can reduce the stiffness of the frame under the condition of having sufficient intensity, so that the nature frequency of the frame is reduced below the operating speed of the motorcycle engine. 相似文献
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XIANG Yan WANG Yuan-liang TANG Li-ling XIAN Cheng-yu WANG Rong ZHANG Bing-bing 《保鲜与加工》2005,(2):128-131145
Serial analysis of gene expression (SAGE) is a powerful technique designed to analyze the information of gene expression. It can not only immediately analyze thousands of genes in detail, but also find new genes. Therefore SAGE is an effective tool of qualitative and quantitative research for gene expression. Recently the SAGE method is widespread applied in cancer research, understanding pathways involved in tumorigenesis and identifying novel diagnostic and therapeutic targets. It is implied that SAGE in implications for cancer research, diagnostic and targeting process will have a great impact on cancer research. 相似文献
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Inactivation of microorganisms can be realized by the accurately controlling the pulse electric field the strength and time for microorganism cell membrane. Use of high pulsed electric field for inactivation of microorganisms is one of the more promising nonthermal processing methods. Compare with pasteurization,it possesses the advantage of instant and even distribution throughout a conductive food system,short treatment time and very little heating of the medium in continuous processing. In addition, HPEF can decrease the loss of nutrition as little as possible. The author critically review the results of earlier experiment studies on HPEF,the mechanisms of inactivation by HPEF,and we suggest the future work that is required in this field. 相似文献
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Product family management is a key support technology to implement mass customized production. Various products in product family are similar in functional characters, physical characters and technological characters, which is an important character of product family. Based on the products represents and mapping relations in functional domain and physical domain, a method of classifying product family is presented by comparing similarity of both functional requirements in functional domain and design parameters in physical domain. The process of classifying product family by virtue of this method is also discussed. At last, a case is introduced to illustrate the application of this method. 相似文献
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This paper discusses the structure, design and key techniques of testing system, and expounds the design and development of hardware and software based on virtual instrument technology. The design of hardware includes signal conditioning module and data acquisition module. The design of software includes interface program and upper layer program. Combining the hardware and software effectively, a testing system for ABS test-bed is set up, which has multifunctions of developing, debugging, inspecting and performance valuing to ABS. Having crucial meaning in engineering, the development of this testing system will make ABS tested in the lab mainly, thus improve the security and make the test more economical. 相似文献
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The Neural Network(NN) is widely applied to many fields for its unique structure and the method of managing information. The basal concept of the NN and the applied method in the field of engine engineering are introduced. Furthermore, a unique NN structure is also established for the output torque of JL474Q1 engine. It affords the theory base to find the best matching strategy between engine and the transmission system of vehicle. 相似文献
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The economical construction and development of China can't be separated from the development of rural economy.Due to appearance and development of rural enterprises,surplus labor force of rural areas was accepted, agricultural economy had been developed and farmers' income enhanced. The traditional agriculture had been reconstructed. The construction and development of small cities and towns are connected with the development of rural economy and accelerate the development of city economy. The construction of small cities and towns can have congregation effect and scale benefit. The industry structure of country will be optimized in whole, management cost will be cut down, energy consumption will be reduced, pollution will be lowered and labor productivity will be increased. In this paper, the importance of town construction in economic development of China is elaborated. The achievement and problem in town construction are summarized. A method of gradual advance for town development is put forward and the problems that must be handled in town development are pointed out. 相似文献
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Vibration Exposure of taxi driver has not only impact on driverg health but the safety of driving. The constantspeed running test and a monitoring test in actually situationare done. The taxi driver vibration exposure testing data is analyzed, and it is found that the vibration exposure evaluation of constant speed test cant satisfy the actually situation. At last, animpersonalassessment is done according to the vibration exposure evaluation standard of ISO2631. 相似文献
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Qian Zhenming Zhen Xu 《保鲜与加工》1993,(2):142-144
The .experimental system of differential Isodyne developed by authors is represented. The function and structure characteristic of the rotatable real-time loading device which is set in oil tank , the hydraulic scanning device and the device for synchronous movement of incident beam and Isodyne collector are mainly discussed. The fringe pattern of differential Isodyne in various characteristic directions and planes can be real-timely taken, by using this system. This system is able to apply to stress analyses of local effect .composite materials and structures. 相似文献
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