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学者姓名：刘超
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Abstract ：
利用分子动力学模拟研究了WC–Co硬质合金在不同条件下的摩擦过程，分析了晶粒尺寸、摩擦载荷和滑动速率等因素对硬质合金摩擦磨损行为的影响，从原子尺度揭示了硬质合金发生摩擦磨损的微观机制。结果表明，随晶粒尺寸增大，相比于晶粒转动，Co相和WC中的位错滑移逐渐在摩擦引起的塑性变形机制中起主导作用。摩擦载荷增大会导致易变形的Co粘结相被挤出表面而首先去除，通过减小晶粒尺寸可以抑制Co相的挤出–磨损机制，进而提高硬质合金的抗滑动磨损性能。滑动速率升高会降低磨损速率，主要原因是在高速滑动过程中，亚表层各相中位错的形核扩展缺乏持续的驱动应力，位错密度较低，WC不易发生断裂，Co相被挤出表面造成的磨损程度明显...
Keyword ：
硬质合金 硬质合金 分子动力学模拟 分子动力学模拟 位错 位错 磨损 磨损 塑性变形 塑性变形 摩擦 摩擦
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| GB/T 7714 | 娄鹤子 , 王海滨 , 刘雪梅 et al. WC–Co硬质合金摩擦磨损行为的分子动力学模拟 [J]. | 粉末冶金技术 , 2022 , 40 (05) : 471-478 . |
| MLA | 娄鹤子 et al. "WC–Co硬质合金摩擦磨损行为的分子动力学模拟" . | 粉末冶金技术 40 . 05 (2022) : 471-478 . |
| APA | 娄鹤子 , 王海滨 , 刘雪梅 , 吕皓 , 刘超 , 林亮亮 et al. WC–Co硬质合金摩擦磨损行为的分子动力学模拟 . | 粉末冶金技术 , 2022 , 40 (05) , 471-478 . |
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Abstract ：
The evolution of financial structure is not only a persistent issue but also a key factor affecting the financial risk. Concerns over the financial structure evolution and risk prevention have been voiced, but studies documented the interaction between financial risk and financial structure are still in their infancy. Therefore, this study investigates it by using detrended cross-correlation analysis, its multifractal asymmetric version, and detrended cross-correlation based on time-delay. Empirical research finds that the market-based financial structure increases financial risk in China. The characteristics of financial risk and financial structure are asymmetry, multifractal, bidirectional transmission, and nonlinear causality. The financial structure's influence on financial risk is strengthened within 15 months, while financial risk's influence on the financial structure strengths within 7 months. These findings support financial supervisory authorities to seek effective strategies to facilitate the evolution of the financial structure and establish a more stable financial system.(c) 2022 Elsevier B.V. All rights reserved.
Keyword ：
Macro-micro prudential supervision Macro-micro prudential supervision Detrended cross-correlation analysis Detrended cross-correlation analysis Financial risk Financial risk Financial structure Financial structure
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| GB/T 7714 | Liu, Chao , Fan, Yixin , Xie, Qiwei et al. Market-based versus bank-based financial structure in China: From the perspective of financial risk [J]. | STRUCTURAL CHANGE AND ECONOMIC DYNAMICS , 2022 , 62 : 24-39 . |
| MLA | Liu, Chao et al. "Market-based versus bank-based financial structure in China: From the perspective of financial risk" . | STRUCTURAL CHANGE AND ECONOMIC DYNAMICS 62 (2022) : 24-39 . |
| APA | Liu, Chao , Fan, Yixin , Xie, Qiwei , Wang, Chao . Market-based versus bank-based financial structure in China: From the perspective of financial risk . | STRUCTURAL CHANGE AND ECONOMIC DYNAMICS , 2022 , 62 , 24-39 . |
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Abstract ：
The article selects socioeconomic data related to 146 prefecture-level cities included in nine city clusters from 2014 to 2018 to establish a city-level socioeconomic system in China. A sensitivity analysis of regional entrepreneurship and economic quality development based on system dynamics was conducted to explore the changes in regional entrepreneurship and economic quality development over time and their sensitivity factors. In this way, the dynamic evolution mechanism of the system can be portrayed, and the optimization of the system can be achieved through the coordination of the factors within the system. The article sets up three scenarios to explore the fluctuations in regional entrepreneurship and economic quality development when three sensitive factors, namely, business environment, financial services scale, and innovation environment, change. Findings: There are differences in the development of cities within city clusters. The business environment and high-quality economic development of the central cities within the city cluster are stronger than those of the non-central cities. Therefore, regions should focus on synergistic development within city clusters when formulating related policies. The variation of regional entrepreneurship development and economic quality development, after a factor in the system is changed, is asymmetric. Because the sensitivity of different urban clusters and the way they are affected by sensitive factors varies, the state should pay more attention to the adaptability of cities when formulating corresponding policy measures and adapt its policy measures to the sensitivity characteristics of each region according to local conditions.
Keyword ：
regional entrepreneurship regional entrepreneurship business environment business environment city cluster city cluster system dynamics system dynamics high-quality economic development high-quality economic development
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| GB/T 7714 | Guo, Ce , Liu, Chao , Xie, Qiwei et al. Regional Entrepreneurship, Business Environment, and High-Quality Economic Development: An Empirical Analysis of Nine Urban Agglomerations in China [J]. | FRONTIERS IN PSYCHOLOGY , 2022 , 13 . |
| MLA | Guo, Ce et al. "Regional Entrepreneurship, Business Environment, and High-Quality Economic Development: An Empirical Analysis of Nine Urban Agglomerations in China" . | FRONTIERS IN PSYCHOLOGY 13 (2022) . |
| APA | Guo, Ce , Liu, Chao , Xie, Qiwei , Lin, Xiaole . Regional Entrepreneurship, Business Environment, and High-Quality Economic Development: An Empirical Analysis of Nine Urban Agglomerations in China . | FRONTIERS IN PSYCHOLOGY , 2022 , 13 . |
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Abstract ：
Purpose Steered by upper echelon theory, this study aims to scrutinize the prevalence of project manager demographic factors (age, education and experience) in project sustainability management and project performance. Design/methodology/approach We used a sample of 209 project managers/supervisor/team leaders who were working in the projects of the China-Pakistan Economic Corridor (CPEC). Findings The results indicate that project manager demographic factors have a significant influence on project performance (except experience) and project sustainability management. Moreover, project sustainability management partially mediates the relationship between age, education and project performance while it fully mediates the path between experience and project performance. Practical implications The research recommends senior, high educated and experienced managers for CPEC who promote sustainability and gain high project performance. Originality/value A number of studies have been carried out to assess the relationship between top managers' attributes and environmental activities. However, so far, none of the studies has paid attention to the CPEC and projects working in Pakistan.
Keyword ：
Project sustainability management Project sustainability management SMEs SMEs Project performance Project performance CPEC CPEC Demographic attributes Demographic attributes Project managers Project managers Project manager attributes Project manager attributes
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| GB/T 7714 | Hashim, Muhammad Zaheer , Chao, Liu , Wang, Chao . The role of project managers' attributes in project sustainability management and project performance under China-Pakistan economic corridor [J]. | CHINESE MANAGEMENT STUDIES , 2022 , 16 (3) : 708-731 . |
| MLA | Hashim, Muhammad Zaheer et al. "The role of project managers' attributes in project sustainability management and project performance under China-Pakistan economic corridor" . | CHINESE MANAGEMENT STUDIES 16 . 3 (2022) : 708-731 . |
| APA | Hashim, Muhammad Zaheer , Chao, Liu , Wang, Chao . The role of project managers' attributes in project sustainability management and project performance under China-Pakistan economic corridor . | CHINESE MANAGEMENT STUDIES , 2022 , 16 (3) , 708-731 . |
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Abstract ：
Using VC and WC-8Co composite powder prepared by in-situ reduction carbonization as raw materials, ultrafine WC-Co cemented carbide was prepared by sinter-HIP technology. The influences of the VC content and the carbon content of the composite powder on the phase composition, microstructure, and mechanical properties of the cemented carbides were investigated. The results show that the grain size, hardness and fracture toughness of cemented carbides are mainly affected by the VC content. These properties change monotonically with the increase of VC content. The change of transverse rupture strength with VC content is related to carbon content. The compression strength decreases first and then increases with the increase of temperature. With the optimized carbon content of WC-8Co composite powder in the range of 5.60wt%similar to 5.68wt% and the VC addition no more than 0.5wt%, the ultrafine cemented carbides with high comprehensive performance were prepared. The highest value of TRS is 4482 MPa at room temperature, and compression strength is 4914 MPa at 600 degrees C. Based on the characteristics of the microstructure and the stress distribution, simulated by the elastic-plastic finite element model, the law of performance change and the mechanism of its performance were analyzed.
Keyword ：
VC addition VC addition ultrafine cemented carbide ultrafine cemented carbide carbon content carbon content high temperature compression strength high temperature compression strength mechanical properties mechanical properties
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| GB/T 7714 | Li Yuheng , Liu Xuemei , Liu Chao et al. Effect of VC Addition and Carbon Content on Mechanical Properties of Ultrafine Cemented Carbides at Room and High Temperatures [J]. | RARE METAL MATERIALS AND ENGINEERING , 2021 , 50 (6) : 2169-2176 . |
| MLA | Li Yuheng et al. "Effect of VC Addition and Carbon Content on Mechanical Properties of Ultrafine Cemented Carbides at Room and High Temperatures" . | RARE METAL MATERIALS AND ENGINEERING 50 . 6 (2021) : 2169-2176 . |
| APA | Li Yuheng , Liu Xuemei , Liu Chao , Lu Hao , Song Xiaoyan . Effect of VC Addition and Carbon Content on Mechanical Properties of Ultrafine Cemented Carbides at Room and High Temperatures . | RARE METAL MATERIALS AND ENGINEERING , 2021 , 50 (6) , 2169-2176 . |
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Abstract ：
Extracellular polymeric substances (EPSs) in activated sludge suspensions are the key substances leading to the membrane fouling. In order to understand the effect of EPSs on the membrane fouling, the actual EPSs solution extracted from activated sludge suspensions was used as the feed solution to conduct dead-end microfiltration experiment under different pressures by using different membranes. The flux (J), fouling resistances (Rm, Rp, Rc and Rtotal) and the available membrane area (A/A0) were used to describe the membrane fouling. The results showed that with the increase of pressure, J and Rtotal increased. Rp firstly increased and then kept constant, Rc always increased and became the dominant resistance. A/A0 decreased from 1 to a constant. Rc plays a key role on Rtotal for different membranes under the same pressure. The sequence of the steady available membrane area (Asteady/A0) for different pressures was: 63.0% (0.05MPa)> 56.5% (0.08MPa)> 53.6% (0.10MPa), and that for different membranes was: 80.1% (0.2μm PES) > 79.9% (0.1μm PES) > 78.4% (0.1μm PAN) > 53.6% (0.1μm PVDF). © Content from this work may be used under the terms of the Creative Commons Attribution 3.0 licence.
Keyword ：
Membranes Membranes Polymers Polymers Microfiltration Microfiltration Energy resources Energy resources Membrane fouling Membrane fouling
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| GB/T 7714 | Li, Qiang , Hu, Ge , Song, Peng et al. Membrane fouling of actual extracellular polymeric substances [C] . 2021 . |
| MLA | Li, Qiang et al. "Membrane fouling of actual extracellular polymeric substances" . (2021) . |
| APA | Li, Qiang , Hu, Ge , Song, Peng , Khaliunaa, Natsagdorj , Khurram, Rooha , Zhang, Hu et al. Membrane fouling of actual extracellular polymeric substances . (2021) . |
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Abstract ：
全息术最初被设定为一种相干成像技术,通过物光和参考光干涉形成全息图,对全息图进行重建可以实现三维成像和物信息的获取。全息图记录过程要求物体上任意两点的光场具有空间互相干性,这一特性限制了全息术在非相干光领域的应用。空间非相干光的普遍存在和易获取等优点,使得非相干全息术的提出和发展具有重要意义。非相干全息术源于20世纪60年代Mertz和Young提出的菲涅耳波带片编码成像理论,是指在空间非相干光照明情形下利用某种编码孔径对图像进行变换,实现全息图记录和再现的技术。Lohmann把这一技术进一步发展为基于分波技巧的干涉成像技术(源于同一物点的物光和参考光相干涉),实现了非相干物体的波前再现,从而...
Keyword ：
互相关重建 互相关重建 三维成像 三维成像 数字全息 数字全息 非相干全息 非相干全息 成像系统 成像系统
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| GB/T 7714 | 万玉红 , 刘超 , 满天龙 et al. 非相干相关数字全息术:原理、发展及应用 [J]. | 激光与光电子学进展 , 2021 , 58 (18) : 126-149 . |
| MLA | 万玉红 et al. "非相干相关数字全息术:原理、发展及应用" . | 激光与光电子学进展 58 . 18 (2021) : 126-149 . |
| APA | 万玉红 , 刘超 , 满天龙 , 菅孟静 , 马腾 , 张沁 et al. 非相干相关数字全息术:原理、发展及应用 . | 激光与光电子学进展 , 2021 , 58 (18) , 126-149 . |
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Abstract ：
首先探究了以Nb2O5、Co和炭黑的原位反应制备纳米NbC-Co复合粉末的最佳工艺,然后以此复合粉作为添加剂,研究了其对低压烧结制备WC-Co硬质合金组织和性能的影响.热力学计算和原位反应实验结果表明,原料粉末中未添加Co时存在明显的Nb2O5→NbO2→NbC两段反应过程,而添加Co不仅显著降低了反应发生温度,还使Nb2O5的还原、碳化两步反应几乎同时进行.通过优化原料粉末的配碳量、反应温度,制备的NbC-Co复合粉物相纯净,具有较低的氧含量,平均粒径为82nm.添加纳米NbC-Co使制备的WC-Co硬质合金的晶粒尺寸由0.7 μm降低至0.48 μm,组织更为均匀,室温和高温硬度均明显提高.即使温度达到800℃,制备的WC-12Co-1NbC硬质合金的硬度仍维持在890HV3?.
Keyword ：
高温硬度 高温硬度 原位合成 原位合成 纳米NbC-Co复合粉 纳米NbC-Co复合粉 硬质合金 硬质合金
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| GB/T 7714 | 王海滨 , 占王彬 , 刘雪梅 et al. 纳米NbC-Co复合粉末的原位合成及其在烧结硬质合金中的应用 [J]. | 粉末冶金工业 , 2021 , 31 (1) : 9-16 . |
| MLA | 王海滨 et al. "纳米NbC-Co复合粉末的原位合成及其在烧结硬质合金中的应用" . | 粉末冶金工业 31 . 1 (2021) : 9-16 . |
| APA | 王海滨 , 占王彬 , 刘雪梅 , 刘超 , 侯超 , 宋晓艳 . 纳米NbC-Co复合粉末的原位合成及其在烧结硬质合金中的应用 . | 粉末冶金工业 , 2021 , 31 (1) , 9-16 . |
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Abstract ：
证券系统是金融系统的重要组成部分,探究我国上市公司行业关联动态演化与证券市场风险之间的相互关系有重要的理论与实践价值.本文使用互信息系数建立了我国上市公司行业关联网络,采用CAViaR模型对我国证券市场风险进行测度,结合DCCA系数法、非线性Granger因果检验分析网络相关性、分布结构与市场风险间的交互关系,并通过比较两个风险聚集区域的网络特征,深入分析市场风险变化给行业带来的关联与结构变动.研究结果表明:当证券市场风险增大时会促使上市公司行业系统的关联性更强,各个行业表现出较为相似的市场走势,此时系统结构虽更趋近于紧密的“中心—外围”式结构,但上市公司行业系统的自主调节功能会削弱甚至化解市场风险对行业关联形态的影响;行业关联结构的外部形态特征存在周期性的震荡;当行业间的关联性增强时,会在一定程度上加速风险的蔓延和传染.根据上述结论,本文提出了相应的政策建议.
Keyword ：
复杂网络 复杂网络 互信息系数 互信息系数 相关性 相关性 市场风险 市场风险 网络结构 网络结构
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| GB/T 7714 | 刘超 , 钱存 , 罗春燕 . 基于复杂网络的行业动态演化与证券市场风险相关性研究——来自2007-2019年28个行业数据的证据 [J]. | 管理评论 , 2021 , 33 (3) : 29-40 . |
| MLA | 刘超 et al. "基于复杂网络的行业动态演化与证券市场风险相关性研究——来自2007-2019年28个行业数据的证据" . | 管理评论 33 . 3 (2021) : 29-40 . |
| APA | 刘超 , 钱存 , 罗春燕 . 基于复杂网络的行业动态演化与证券市场风险相关性研究——来自2007-2019年28个行业数据的证据 . | 管理评论 , 2021 , 33 (3) , 29-40 . |
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Abstract ：
以原位还原碳化技术制备的WC-8Co复合粉和VC粉末为原料,采用低压烧结技术制备出超细晶硬质合金。系统研究了VC添加量和复合粉中碳含量对硬质合金的相组成、显微组织、室温和高温力学性能的影响。结果表明:硬质合金的晶粒尺寸、硬度和断裂韧性主要受VC添加量的影响,且随VC添加量的增加呈单调变化;抗弯强度随VC添加量的变化趋势与碳含量有关;压缩强度随温度的变化呈现先降低后升高的趋势;当WC-Co复合粉的碳含量为5.60%～5.68%(质量分数)、VC添加量不超过0.5%时,可分别制备出室温抗弯强度为4482MPa和600℃下抗压缩强度为4914MPa的高综合性能的超细晶硬质合金。基于微观组织特征的分析...
Keyword ：
VC添加 VC添加 高温压缩性能 高温压缩性能 超细晶硬质合金 超细晶硬质合金 碳含量 碳含量 力学性能 力学性能
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| GB/T 7714 | 李雨衡 , 刘雪梅 , 刘超 et al. VC和碳含量对超细晶硬质合金室温和高温性能的影响 [J]. | 稀有金属材料与工程 , 2021 , 50 (06) : 2169-2176 . |
| MLA | 李雨衡 et al. "VC和碳含量对超细晶硬质合金室温和高温性能的影响" . | 稀有金属材料与工程 50 . 06 (2021) : 2169-2176 . |
| APA | 李雨衡 , 刘雪梅 , 刘超 , 吕皓 , 宋晓艳 . VC和碳含量对超细晶硬质合金室温和高温性能的影响 . | 稀有金属材料与工程 , 2021 , 50 (06) , 2169-2176 . |
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