• Title/Summary/Keyword: 소성진

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The Spatial Policy of Small Towns in China : Its Significance and Role in Rural Urbanization (중국 소성진 공간정책의 의의와 역할)

  • 문순철
    • Journal of the Korean Geographical Society
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    • v.32 no.2
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    • pp.229-244
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    • 1997

  • This study investigates the spatial policy of small towns in China. Small towns in China are important in terms of settlement system, rural urbanization and new adaptation to changing situation. It was necessary that they shoud take charge of the tool for solving the problem in rural reform periods. Rural urbanization, which had aimed at transferring the surplus labor smoothlv, was connected with the growth of rural industrialization (a township enterprise). However, the location of township enterprises was so dispersed that the transfer of surplus labors was not satisfactory. Hence, the concentration of the rural industry in small towns has been taken up as an inevitable alternative. Namely, it can be said that changes and adaptation of reform process, such as industrial restructuring and migration, should be integrated and concentrated in small towns.

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분말단조 해석을 위한 다공질 합금강 프리폼의 고온 업셋

  • Kim, Gi-Tae;Jo, Yun-Ho
    • Transactions of Materials Processing
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    • v.1 no.2
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    • pp.14-19
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    • 1992

  • 분말단조 공정의 해석을 위한 기초연구로서 고용 업셋에 의한 다공질 합금강 프리폼의 치밀화와 소성 변형거동에 관하여 조사하였다. 다공질 프리폼의 소성 유동응력은 용도의 상승에 떠라 감소하였고, 변형속도의 증가에 따라 증가함을 보였다. 또한, 다공질 프리폼의 초기밀도가 더 높을수록 동일한 온도와 하중조건에서 더 높은 치밀화를 보였다. 또한, 밀도변화에 따른 프와송 비를 실험치로 부터 구하였고, 배불림 현상과 체적변화를 고려하여 온도에 따른 진응력-진변형률 관계를 구하였다.

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