In summary, the alkylation performances of isobutane with butene over bothheteropoly acid and zeolite catalysts have been investigated in this thesis, and theresults are helpful for further development of the solid acid catalysts for this process.

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In the catalytic pyrolysis process, the summary yield of ethylene, propylene and butylene reaches 51. 54wt%, indicating the prospective future for application of downer reactor in this process.

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In the fifth chapter, it makes a summary about the whole paper include conclusion and defect of the paper. It also looks into the future of the application of CAID system which base on the process control of produce style design.

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Generally understanding anatomical summary and features of fractures of the ankle and calcaneum.

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Based on a summary of main work in the field of analyzing impulse voltage distribution on normal transformer windings by computer over last several years, a new method for building up the equivalent circuit and calculating equivalent parameters of converter transformer is given in this paper. Meanwhile , a new method for calculating inductance parameters is given also .

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This paper analyzes the international situation faced by international oil industry market though the summary of international project's development of Changqing Petroleum Bureau, discusses problems in international project based on the fully analysis of CPEB's resources superiority and opportunity at present, takes the CNPC's 11th Five-Year Plan and CPEB's overall development plan as the instruction, follows the general theory and principle of international petroleum engineering project management, take the continual ,stable, coordinated development that suits and guarantees international petroleum project as the goal, discusses the development direction of international petroleum exploration project and the thread and plan that fits the CPEB's international project management based on the reference to successful experience of international petroleum companys'project management, establishes a scientific pattern that fits CPEB's project management of international project, reasonably deploys and manages all the resource in international project, makes the operation management canonical, provides scientific basis for the corporation's decision-making though adjusting and conformity CPEB's management department of international project.

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This paper mainly from the "Yellow River Cantata" creative motives, 8 movement of the melody tonality of summary and analysis of the PC, and the "Yellow River Cantata" After the meaning of simple exposition.

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This article is an introduction and summary of retirement pension system, annuity administration management style and classification, investment tool, capital disposition, capital investment supervision and control, return on investment and corporation annuity tax preference aspect in industrially advanced country, such as the US and UK, etc.

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For some reasons, there has not been a systematic summary about the development history of carding machine in China.

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