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学者姓名：刘超
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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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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 ：
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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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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The compression of the ciphertext of a cryptosystem is desirable considering the dramatic increase in secure data transfer via Internet. In this paper, we propose a simple and universal scheme to compress and decompress the ciphertext of an optical cryptosystem by the aid of deep learning (DL). For compression, the ciphertext is first resized to a relatively small dimension by bilinear interpolation and thereafter condensed by the JPEG2000 standard. For decompression, a well-trained deep neural network (DNN) can be employed to perfectly recover the original ciphertext, in spite of the severe information loss suffered by the compressed file. In contrast with JPEG2000 and JPEG, our proposal can achieve a far smaller size of the compressed file (SCF) while offering comparable decompression quality. In addition, the SCF can be further reduced by compromising the quality of the recovered plaintext. It is also shown that the compression procedure can provide an additional security level, and this may offer new insight into the compressive encryption in optical cryptosystems. Both simulation and experimental results are presented to demonstrate the proposal.
Keyword ：
ciphertext compression ciphertext compression deep learning deep learning Optical security Optical security
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| GB/T 7714 | Qin, Yi , Wan, Yuhong , Wan, Shujia et al. Optical Compressive Encryption via Deep Learning [J]. | IEEE PHOTONICS JOURNAL , 2021 , 13 (4) . |
| MLA | Qin, Yi et al. "Optical Compressive Encryption via Deep Learning" . | IEEE PHOTONICS JOURNAL 13 . 4 (2021) . |
| APA | Qin, Yi , Wan, Yuhong , Wan, Shujia , Liu, Chao , Liu, Wei . Optical Compressive Encryption via Deep Learning . | IEEE PHOTONICS JOURNAL , 2021 , 13 (4) . |
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In this study, CaF2 was introduced into WC-Co to prepare bulk self-lubricating cemented carbides by sinter-HIP. The studied compositions were WC-12Co with no more than 20 vol% CaF2 additions. The effects of CaF2 on the tribological behaviors and mechanical properties of cemented carbides were investigated. It was found that the prepared self-lubricating cemented carbides with CaF2 were nearly fully dense and CaF2 would refine the WC grains. Although CaF2 could not obviously enhance the mechanical properties of cemented carbides, it improved their tribological behaviors remarkably. The friction coefficient and wear loss during dry sliding could be reduced noticeably by the introduction of CaF2. The mechanism of tribological performance improvement was attributed to the lubricating film formation during the friction process. It would avoid direct contact between the friction counterparts and prevent severe wear of the materials. This study provides a new promising approach for cemented carbides to achieve better tribological performances by the self-lubrication design.
Keyword ：
Tribological performance Tribological performance Mechanical properties Mechanical properties Cemented carbide Cemented carbide Self-lubrication Self-lubrication
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| GB/T 7714 | Liu, Shuai , Lu, Hao , Liu, Chao et al. Tribological behavior of WC-Co-CaF2 self-lubricating cemented carbides [J]. | INTERNATIONAL JOURNAL OF REFRACTORY METALS & HARD MATERIALS , 2021 , 96 . |
| MLA | Liu, Shuai et al. "Tribological behavior of WC-Co-CaF2 self-lubricating cemented carbides" . | INTERNATIONAL JOURNAL OF REFRACTORY METALS & HARD MATERIALS 96 (2021) . |
| APA | Liu, Shuai , Lu, Hao , Liu, Chao , Liu, Xuemei , Wang, Haibin , Song, Xiaoyan . Tribological behavior of WC-Co-CaF2 self-lubricating cemented carbides . | INTERNATIONAL JOURNAL OF REFRACTORY METALS & HARD MATERIALS , 2021 , 96 . |
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With the rapid depletion of fossil fuels and increasing concern about climate change, photovoltaic systems have become a key technology option for realizing a decarbonized power sector and sustainable energy supply. The global trade in photovoltaic cells has increased dramatically in the last two decades and deserves a dedicated investigation. First, from a static analysis perspective, this study builds the global photovoltaic cell trade network and trade competition network from 2000 to 2019 and analyzes the trade characteristics and competition pattern in the global photovoltaic cell trade. Second, from a dynamic analysis perspective, the potential impacts of coronavirus disease 2019 on the global photovoltaic cell trade is simulated based on 2019 trade data. The network analyses show that China, Germany and Japan have long dominated the trade market in photovoltaic cells. From 2000 to 2019, China?s total imports and exports were the largest. Asian countries held an important position in global photovoltaic cell exports. The competition in the global photovoltaic cell trade was concentrated in Asia and Europe. The simulation results indicate that the global photovoltaic cell trade network shows a ?robust-yet-fragile? configuration. This network is more resistant to demand-reduction-driven shocks than to supply-reduction-driven shocks. Policy implications are provided for managing the photovoltaic cell trade at the national and global levels and coping with future extreme disturbances.
Keyword ：
Trade characteristics Trade characteristics Photovoltaic cells Photovoltaic cells Shock propagation Shock propagation Competition pattern Competition pattern COVID-19 COVID-19
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| GB/T 7714 | Wang, Chao , Huang, Xia , Hu, Xiaoqian et al. Trade characteristics, competition patterns and COVID-19 related shock propagation in the global solar photovoltaic cell trade [J]. | APPLIED ENERGY , 2021 , 290 . |
| MLA | Wang, Chao et al. "Trade characteristics, competition patterns and COVID-19 related shock propagation in the global solar photovoltaic cell trade" . | APPLIED ENERGY 290 (2021) . |
| APA | Wang, Chao , Huang, Xia , Hu, Xiaoqian , Zhao, Longfeng , Liu, Chao , Ghadimi, Pezhman . Trade characteristics, competition patterns and COVID-19 related shock propagation in the global solar photovoltaic cell trade . | APPLIED ENERGY , 2021 , 290 . |
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In this study, activated nano TaC was introduced into WC-Co cemented carbides to enhance their comprehensive performance properties. Changes of mechanical properties, elements distributions, phase constitutions and microstructures of the cemented carbides were examined as a function of TaC amount. It was found that due to the addition of activated nano TaC, nanoscale Co-rich particles and cubic-Ta4C3 precipitates were induced and dispersed within WC grains, which had good coherent interfacial relationship with the hard matrix. The combined strengthening effects of the nano precipitates and solid solution in WC resulted in excellent comprehensive mechanical properties of the cemented carbides. Particularly, the rupture strength has achieved the highest among those of the counterparts reported in the literature so far. This study opens a new perspective to use activated nano compound particles to modulate hard phases of cermet materials for high comprehensive performance. © 2020 Elsevier Ltd
Keyword ：
Carbide tools Carbide tools Cobalt compounds Cobalt compounds Carbides Carbides Mechanical properties Mechanical properties
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| GB/T 7714 | Zhao, Chong , Lu, Hao , Liu, Xuemei et al. Strengthening cemented carbides by activated nano TaC [J]. | International Journal of Refractory Metals and Hard Materials , 2021 , 95 . |
| MLA | Zhao, Chong et al. "Strengthening cemented carbides by activated nano TaC" . | International Journal of Refractory Metals and Hard Materials 95 (2021) . |
| APA | Zhao, Chong , Lu, Hao , Liu, Xuemei , Liu, Chao , Nie, Zuoren , Song, Xiaoyan . Strengthening cemented carbides by activated nano TaC . | International Journal of Refractory Metals and Hard Materials , 2021 , 95 . |
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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 ：
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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