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  1.  8
    Finite-Time Switching Control of Nonholonomic Mobile Robots for Moving Target Tracking Based on Polar Coordinates.Hua Chen, Shen Xu, Lulu Chu, Fei Tong & Lei Chen - 2018 - Complexity 2018:1-9.
    In this paper, finite-time tracking problem of nonholonomic mobile robots for a moving target is considered. First of all, polar coordinates are used to characterize the distance and azimuth between the moving target and the robot. Then, based on the distance and azimuth transported from the sensor installed on the robot, a finite-time tracking control law is designed for the nonholonomic mobile robot by the switching control method. Rigorous proof shows that the tracking error converges to zero in a finite (...)
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  2.  20
    The Long-Term Extreme Price Risk Measure of Portfolio in Inventory Financing: An Application to Dynamic Impawn Rate Interval.Juan He, Jian Wang, Xianglin Jiang, Xiangfeng Chen & Lei Chen - 2015 - Complexity 20 (5):17-34.
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  3.  13
    Pore Characteristics and Dominant Controlling Factors of Overmature Shales: A Case Study of the Wangyinpu and Guanyintang Formations in the Jiangxi Xiuwu Basin.Fenglin Gao, Yan Song, Zhuo Li, Zhenxue Jiang, Zhiye Gao, Xinxin Zhang, Lei Chen & Qingxin Liu - 2018 - Interpretation: SEG 6 (2):T393-T412.
    Because of the great potential for hydrocarbon generation, the Lower Cambrian Wangyinpu and Guanyintang Formations of the Jiangxi Xiuwu Basin have become the most important targets for shale-gas exploration in the Jiangxi province. We investigate the pore characteristics and main controlling factors of overmature shale using field emission-scanning electron microscopy, image-processing software, X-ray diffraction, and gas-adsorption experiments. The results show that the shales have a high abundance of organic matter, over maturity, and highly siliceous mineral content. The kerogen type is (...)
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  4.  46
    Both Earlier Times and the Future Are “Front”: The Distinction Between Time- and Ego-Reference-Points in Mandarin Speakers’ Temporal Representation.Chengli Xiao, Mengya Zhao & Lei Chen - 2018 - Cognitive Science 42 (3):1026-1040.
    Mandarin speakers, like most other language speakers around the world, use spatial terms to talk about time. However, the direction of their mental temporal representation along the front-back axis remains controversial because they use the spatial term “front” to refer to both earlier times and the future. Although the linguistic distinction between time- and ego-reference-point spatiotemporal metaphors in Mandarin suggests a promising clarification of the above controversy, there is little empirical evidence verifying this distinction. In this study, Mandarin speakers’ time- (...)
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  5.  17
    Pore Characteristics and Dominant Controlling Factors of Overmature Shales: A Case Study of the Wangyinpu and Guanyintang Formations in the Jiangxi Xiuwu Basin.Fenglin Gao, Yan Song, Zhuo Li, Zhenxue Jiang, Zhiye Gao, Xinxin Zhang, Lei Chen & Qingxin Liu - 2018 - Interpretation 6 (2):T393-T412.
    Because of the great potential for hydrocarbon generation, the Lower Cambrian Wangyinpu and Guanyintang Formations of the Jiangxi Xiuwu Basin have become the most important targets for shale-gas exploration in the Jiangxi province. We investigate the pore characteristics and main controlling factors of overmature shale using field emission-scanning electron microscopy, image-processing software, X-ray diffraction, and gas-adsorption experiments. The results show that the shales have a high abundance of organic matter, over maturity, and highly siliceous mineral content. The kerogen type is (...)
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  6.  14
    Relationship Between Pore Characteristics and Occurrence State of Shale Gas: A Case Study of Lower Silurian Longmaxi Shale in the Upper Yangtze Platform, South China.Lei Chen, Zhenxue Jiang, Keyu Liu, Pengfei Wang, Yu Liu, He Bi, Fenglin Gao, Chen Zhang & Wenming Ji - 2017 - Interpretation: SEG 5 (3):T437-T449.
    We have used focused ion beam-helium ion microscopy and low-pressure [Formula: see text] adsorption to investigate the pore characteristics of Lower Silurian Longmaxi shale. These results, combined with the molecular potential energy theory, reveal the relationship between pore size and the occurrence state of shale gas. Our results reveal that the pore volume and the specific surface area of Lower Silurian Longmaxi shale are mainly contributed by the pores with diameters of less than 10 nm. Nanoscale organic-matter pores are predominant, (...)
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  7.  25
    Geology, Resource Potentials, and Properties of Emerging and Potential China Shale Gas and Shale Oil Plays.Shu Jiang, Jinchuan Zhang, Zhiqiang Jiang, Zhengyu Xu, Dongsheng Cai, Lei Chen, Yue Wu, Dongsheng Zhou, Zhenglong Jiang, Xingbin Zhao & Shujing Bao - 2015 - Interpretation: SEG 3 (2):SJ1-SJ13.
    This paper describes the geology of organic-rich shales in China, their resource potentials, and properties of emerging and potential China shale gas and shale oil plays. Marine, lacustrine, and coastal swamp transitional shales were estimated to have the largest technically recoverable shale gas resource and 25 to 50 billion barrels of technically recoverable shale oil resource. The Precambrian Sinian Doushantuo Formation to Silurian Longmaxi black marine shales mainly accumulated in the intrashelf low to slope environments in the Yangtze Platform in (...)
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  8.  39
    Cultural Differences in Visual Search for Geometric Figures.Yoshiyuki Ueda, Lei Chen, Jonathon Kopecky, Emily S. Cramer, Ronald A. Rensink, David E. Meyer, Shinobu Kitayama & Jun Saiki - 2018 - Cognitive Science 42 (1):286-310.
    While some studies suggest cultural differences in visual processing, others do not, possibly because the complexity of their tasks draws upon high-level factors that could obscure such effects. To control for this, we examined cultural differences in visual search for geometric figures, a relatively simple task for which the underlying mechanisms are reasonably well known. We replicated earlier results showing that North Americans had a reliable search asymmetry for line length: Search for long among short lines was faster than vice (...)
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  9.  19
    Organic Cofactors Participated More Frequently Than Transition Metals in Redox Reactions of Primitive Proteins.Hong‐Fang Ji, Lei Chen & Hong‐Yu Zhang - 2008 - Bioessays 30 (8):766-771.
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  10.  22
    Whole-Aperture Characteristics and Controlling Factors of Pore Structure in the Chang 7th Continental Shale of the Upper Triassic Yanchang Formation in the Southeastern Ordos Basin, China.Wei Yang, Yan Song, Zhenxue Jiang, Qun Luo, Qianyou Wang, Yuan Yuan, Chen Zhang & Lei Chen - 2018 - Interpretation: SEG 6 (1):T175-T190.
    Quantitative assessment is still lacking on the pore-sizes distribution of micropores and mesopores, and the major controlling factors remain enigmatic for the continental Chang 7th shale reservoirs in southeastern Ordos Basin. In this study, scanning electron microscopy, organic geochemical analysis, low-temperature gas adsorption, high-pressure mercury injection, and X-ray diffraction analysis were conducted on 29 core samples from representative eight wells in the Xiasiwan-Yanchang area, yielding a particular investigation on characteristics and controlling factors of the structure in the Chang 7th shale. (...)
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  11.  24
    Evolutionary Formation of New Protein Folds is Linked to Metallic Cofactor Recruitment.Hong-Fang Ji, Lei Chen, Ying-Ying Jiang & Hong-Yu Zhang - 2009 - Bioessays 31 (9):975-980.
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  12.  16
    Local Institutions, Audit Quality, and Corporate Scandals of US-Listed Foreign Firms.Lei Chen - 2016 - Journal of Business Ethics 133 (2):351-373.
    Using data on shareholder-initiated class action lawsuits in the US, I investigate the corporate scandals of US-listed foreign firms. The shareholders of scandal firms suffer considerable loss in both the short term and the long term. I document that firms domiciled in countries with weak institutions are more likely to be embroiled in corporate scandals, but such a relation can be moderated by the presence of Big 4 auditors. Investors automatically adjust for undiscovered misconduct when valuing the stocks of non-scandal (...)
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  13.  11
    Pragmatic Analysis of Fuzziness in Advertising English.Lei Chen - 2011 - Asian Culture and History 3 (2):p29.
    The article tentatively explores the fuzzy expressions in advertising English to realize the ultimate goal of advertising from the perspective of pragmatics. This study is devoted to the pragmatic theories employed by the advertisers in order to make advertisements persuasive, impressive to the target audience. Equipped with the pragmatic knowledge, the target audience can understand advertising language clearly.
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