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Characteristics and driving factors of the technology cooperation network evolution : a case study of solid waste treatment field in China

Ma, Yonghong; Yang, Xiaomeng; Qu, Sen; Lingkai, Kong - In: Technology analysis & strategic management 35 (2023) 5, pp. 508-522

Persistent link: https://www.econbiz.de/10014301359

Tracing the evolution of 3-D printing technology in China using LDA-based patent abstract mining

Wei, Chen; Chaoran, Lin; Chuanyun, Li; Lingkai, Kong; … - In: IEEE transactions on engineering management : EM 69 (2022) 4, pp. 1135-1145

Persistent link: https://www.econbiz.de/10013354968

The construction and application of a new exchange rate forecast model combining ARIMA with a chaotic BP algorithm

Ma, Yonghong; Wu, Zhiyong; Ai, Mingye; Wang, Wei - In: Emerging markets finance & trade : a journal of the … 52 (2016) 4/6, pp. 1481-1495

Persistent link: https://www.econbiz.de/10011563577

Proximity in consumer network and company new products decisions

Ma, Yonghong; Zhao, Zhihua - In: Finance research letters 59 (2024), pp. 1-8

Persistent link: https://www.econbiz.de/10014445343

Stock price synchronicity and stock price crash risk : based on the mediating effect of herding behavior of QFII

Jin, Yonghong; Yan, Mengya; Xi, Yuqin; Liu, Chunmei - In: China finance review international 6 (2016) 3, pp. 230-244

Persistent link: https://www.econbiz.de/10011722755

Parameterized dominating set problem in chordal graphs : complexity and lower bound

Liu, Chunmei; Song, Yinglei - In: Journal of combinatorial optimization 18 (2009) 1, pp. 87-97

Persistent link: https://www.econbiz.de/10003903729

Algorithms and time complexity of the request-service problem

Liu, Chunmei; Burge, Legand; Blake, Ajoni - In: Journal of combinatorial optimization 20 (2010) 2, pp. 180-193

Persistent link: https://www.econbiz.de/10008657918

Parameterized complexity and inapproximability of dominating set problem in chordal and near chordal graphs

Liu, Chunmei; Song, Yinglei - In: Journal of combinatorial optimization 22 (2011) 4, pp. 684-698

Persistent link: https://www.econbiz.de/10009388413

Finite Element Simulation and Experiment of Six-Axis Free Bending & Twisting Forming (6fbtf) of 304 Stainless Steel Square Tube Spiral Component

Yang, Qiucheng; Liu, Chunmei; Cheng, Cheng; Tao, Jie; … - 2022

Stainless steel square tube components with complex spatial shapes are widely used in the fields of vehicles, ships, construction machinery and construction. Due to these components tend to be diversified in shape, the ordinary three-axis free bend-ing technology can not keep up with the...

Persistent link: https://www.econbiz.de/10013297046

Some equalities for estimations of variance components in a general linear model and its restricted and transformed models

Tian, Yongge; Liu, Chunmei - In: Journal of Multivariate Analysis 101 (2010) 9, pp. 1959-1969

For the unknown positive parameter [sigma]2 in a general linear model , the two commonly used estimations are the simple estimator (SE) and the minimum norm quadratic unbiased estimator (MINQUE). In this paper, we derive necessary and sufficient conditions for the equivalence of the SEs and...

Persistent link: https://www.econbiz.de/10008861562