Výsledky vyhledávání - "Li Changming"

Akademický článek

Evaluation of top coal cavability based on PCA-FDA model

Autor: Xue Liming, Zheng Zhixue, Su Chao, Li Changming, Liu Baokang, Li Hongliang

Publikováno v: 矿业科学学报, Vol 3, Iss 4, Pp 356-363 (2018)

In order to evaluate top coal cavability reasonably, and determine whether coal seam is suitable for top-coal caving.The top coal cavability evaluation model (PCA-FDA) was established by combining principal component analysis(PCA) and Fisher discrimi

Externí odkaz: https://doaj.org/article/729718d99a4747d5a5377324e26741c4

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Akademický článek

Grading assessment of top coal cavability based on moment estimation and TOPSIS model

Autor: Xue Liming, Su Chao, Zheng Zhixue, Zhu Linlong, Li Changming, Liu Baokang, Xu Cuiyun

Publikováno v: 矿业科学学报, Vol 3, Iss 1, Pp 61-67 (2018)

As there are many influencing factors in grading assessment of top coal cavability,the moment estimation theory which can comprehensively take into account both subjective and objective factors of weighting is used to optimize the weight of each infl

Externí odkaz: https://doaj.org/article/b7c2aa21545e4e978e1b22fc1ed4896a

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Akademický článek

Research on Systematic Design and Installation Based on Explosion Protection Technology Combined with Traction Elevator

Autor: Li Changming, Wang Qibing, Leng Yonggang, Li Yu

Publikováno v: MATEC Web of Conferences, Vol 167, p 03005 (2018)

According to GB, NEC, ASME17.1, ANSI A10.4 and EN 81.1 standard, there is a danger of explosive gas or dust. And then for elevator explosion protection, we design a device type up to requirements of NEC Class 1, Division 1, Group C&D as well as NEC C

Externí odkaz: https://doaj.org/article/df8c42d376a1477dbc00009d10311c86

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