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自愿披露客户信息影响了债券违约风险吗?

南京审计大学学报 2024年第1期21卷 67-75页

作者：王生年董今威石河子大学经济与管理学院新疆石河子832000

以2010—2021年沪深A股上市公司发行的公司债为样本,实证检验了自愿披露客户信息对债券违约风险的影响。研究发现,自愿披露客户信息产生的额外风险加剧了债券违约风险,这种影响在高专有成本和高融资约束的企业中表现更为显著,但企业发... 详细信息

以2010—2021年沪深A股上市公司发行的公司债为样本,实证检验了自愿披露客户信息对债券违约风险的影响。研究发现,自愿披露客户信息产生的额外风险加剧了债券违约风险,这种影响在高专有成本和高融资约束的企业中表现更为显著,但企业发行的绿色债券并未受到影响。机制检验表明,经营风险增加和机构投资者持股降低是自愿披露客户信息影响债券违约风险的重要途径。研究表明,企业需要慎重考虑披露客户信息带来的风险,审慎制定信息披露策略。

关键词：客户信息披露债券违约风险风险效应专有成本融资约束机构投资者持股绿色债券

Interface tuning of Cu+/CuO by zirconia for dimethyl oxalate hydrogenation to ethylene glycol over Cu/SiO2 catalyst

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Journal of Energy Chemistry 2020年第10期29卷 248-256页

作者： Yujun Zhao Huanhuan Zhang Yuxi Xu shengnian wang Yan Xu Shengping wang Xinbin Ma Key Laboratory for Green Chemical Technology of Ministry of Education Collaborative Innovation Center of Chemical Science and EngineeringSchool of Chemical Engineering and TechnologyTianjin UniversityTianjin 300072China Chemical Engineering Institute for Micromanufacturing.Louisiana Tech UniversityRustonLA 71272USA

An efficient ZrO2-doped Cu/SiO2 catalyst was fabricated through hydrolysis precipitation method(HP)and used to produce ethylene glycol(EG)through dimethyl oxalate(DMO)hydrogenation.The states for zirconia on copper catalyst and roles in DMO hydrogenation were investigated through various characterization tools,including N2 physical adsorption,XRD,H2-TPR,Methyl glycolate-TPD-MS,XPS,XAES as well.Compared with common ammonia evaporation and co-precipitation methods used in catalyst preparation,this HP method is found to effectively suppress the agglomeration and further size growth of copper nanoparticles by enhancing the interactions between copper and zirconia species.More importantly,uniform distribution of ZrO2 dopant is achieved due to the pseudo-homogeneous reactions in the mixing step of catalyst preparation.A proper amount of zirconium dopant helps achieve the desirable proportion of Cu+/(Cu++CuO)for surface copper species,especially promotes the production of Cu+species originated from Cu-ZrO2 species at the interface of copper and zirconia particles.In comparison with Cu+species formed from copper phyllosilicates reduction,the Cu+sites derived from Cu-ZrO2 species show higher adsorption ability of MG,an important intermediate species in ethylene glycol production.These adsorbed MG molecules further react with atomic hydrogen shifted from adjacent metallic copper surface,leading to a higher catalytic behavior.For the EG production via DMO hydrogenation,the turnover frequency(TOF)normalized by CuO species on CuZr/SiO2 catalyst is 1.8 times than that of traditional Cu/SiO2 counterpart.Due to the enhanced synergy effect between Cu+and Cuo active sites,a lower activation energy of ester hydrogenation on this ZrO2-doped Cu/SiO2 catalyst is believed to be responsible for the significant improvement.

关键词： Copper Zirconia Hydrogenation Ethylene glycol

New ZnCe catalyst encapsulated in SBA-15 in the production of 1,3-butadiene from ethanol

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Chinese Chemical Letters 2020年第2期31卷 535-538页

作者： Yujun Zhao Sijia Li Zheng wang shengnian wang Shengping wang Xinbin Ma Key Laboratory for Green Chemical Technology of Ministry of Education.Collaborative Innovation Center of Chemical Science and Engineering School of Chemical Engineering and TechnologyTianjin UniversityTianjin 300072China Chemical Engineering Institute for MicromanufacturingLouisiana Tech UniversityRustonLA 71272United States

ZnO-CeO2/SBA-15 catalysts were prepared by two kinds of solid-state grinding method and used for the production of 1,3-butadiene(1,3-BD) from ethanol.A mixture of SBA-15(with or without organic template) and metal precursors were ground in solid-state.The obtained catalysts were characterized by TG,N2 adsorption-desorption,TEM,XRD,Py-FTIR and NH_3-TPD techniques.Superior dispersion of metal oxides and more exposed acid sites were achieved on the catalyst lOZn_1Ce_5-AS with the presence of organic template in SBA-15 during the solid-state grinding process.The catalytic performance was evaluated in a fixed-bed reactor and a 1,3-butadiene selectivity of as high as 45% is achieved.This is attributed to the coupling effect of Zn and Ce species in the mesopores of SBA-15,in which Zn promotes ethanol dehydrogenation and Ce enhances aldol-condensation,respectively.Additionally,solvent-free method inspires new catalyst synthesis strategy for the production of 1,3-butadiene from ethanol.

关键词： 1,3-Butadiene Ethanol SBA-15 Dehydrogenation Aldol-condensation

Mechanical properties and strengthening mechanism of silty sands stabilized with steel slag-based geopolymer binder

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Emergency Management Science and Technology 2022年第1期2卷 133-139页

作者： shengnian wang Zewei Chen Zhijian Wu Leilei Gu Jun Su Zexuan Zhao College of Transportation Science&Engineering Nanjing Tech UniversityNanjing 211816China CCCC First Highway Engineering Bureau Co. Ltd.Beijing 100024China

Geopolymer binder has the advantages of early strength,fast solidification,high volume stability,and low permeability.It is beneficial to improve the mechanical performance of silty sands,saving cement consumption and being environmentally friendly.However,the strength improvement of silty sand stabilized with steel slag-based geopolymer was significantly controlled by their material composition and technical parameters.This study conducted a series of unconfined compression tests to investigate the material composition of steel slag-based geopolymer binders and their reasonable mixing ratio for silty sand stabilization.The optimum mixing ratio of precursor(steel slag)to alkaline activator(the combination of Na2SiO3 and CaO)and the optimum dosage of steel slag-based geopolymer for silty sand stabilization were explored.The strengthening mechanism of geopolymer-stabilized silty sands was discussed based on microstructural images and elemental concentrations of primary components observed by SEM and EDS.The results show that when the mass ratio of steel slag:Na2SiO3:CaO was 80:35:21,and the steel slag-based geopolymer material was 15%,the silty sand could achieve the best mechanical performance improvement.The microstructural characteristics of geopolymer-stabilized silty sands at different curing ages illustrated that the compactness and integrity of silty sand structures were enhanced over the curing age.The improving cementitious contact among particles and enlarging particle size was responsible for the strength improvement of silty sand.This research can provide a reference for applying steel slag-based geopolymer in silty sand stabilization in engineering practices.

关键词： steel strengthening solidification

补偿抑或挤出?命令控制型环境规制与企业风险承担——基于中国A股上市公司的证据

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南京财经大学学报 2024年第1期 22-32页

作者：王生年张佩侯丹阳石河子大学经济与管理学院新疆石河子832000

环境规制是生态文明建设的有力手段,而投资决策中的风险承担是企业进行绿色转型的重要条件。基于2010—2021年A股上市公司数据,实证检验了命令控制型环境规制对企业风险承担的影响及其作用机制。研究发现:命令控制型环境规制显著提升了... 详细信息

环境规制是生态文明建设的有力手段,而投资决策中的风险承担是企业进行绿色转型的重要条件。基于2010—2021年A股上市公司数据,实证检验了命令控制型环境规制对企业风险承担的影响及其作用机制。研究发现:命令控制型环境规制显著提升了企业风险承担水平。机制分析表明,命令控制型环境规制通过创新机制、信息机制及资源机制对企业风险承担产生正向影响,且这种影响在地方财政分权程度低的企业、非“双高”企业以及区域创新文化水平高的企业中更显著。有效性分析结果显示,尽管命令控制型环境规制推高的企业风险承担在短期内可以提升企业绩效,但其导致的资本配置效率降低会损害企业的长期价值。研究结论为推动企业绿色转型,完善政府主导的环境政策体制提供经验证据。

关键词：命令控制型环境规制风险承担挤出效应补偿效应环境治理

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企业并购战略影响了股票错误定价吗

金融与经济 2024年第2期 46-59页

作者：黄兰兰董建博王生年丽水学院商学院石河子大学经济与管理学院

选取2007—2021年沪深A股上市公司为样本,探究企业并购战略对股票错误定价的影响。实证结果表明,境内与跨境并购战略均加剧了企业的股票错误定价,且跨境并购的影响更大。机制检验发现,盈余管理和投资者情绪在企业并购战略对股票错误定... 详细信息

选取2007—2021年沪深A股上市公司为样本,探究企业并购战略对股票错误定价的影响。实证结果表明,境内与跨境并购战略均加剧了企业的股票错误定价,且跨境并购的影响更大。机制检验发现,盈余管理和投资者情绪在企业并购战略对股票错误定价的影响中发挥了部分中介作用。进一步研究表明,战略委员会和产品市场竞争具有重要的调节作用,能有效缓解并购战略对股票错误定价的影响。

关键词：企业并购盈余管理投资者情绪股票错误定价

水泥复合偏高岭土稳定粉砂土力学特性试验研究

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地质与勘探 2024年第1期60卷 148-155页

作者：谷雷雷张梅邓先军吉久发于剑波王盛年中交一公局集团有限公司北京100024 南京工业大学交通运输工程学院江苏南京211816

使用低成本高硅铝矿物掺合料可在提升水泥土工程性能的同时降低水泥用量。通过开展系列抗压强度试验研究了水泥偏高岭土掺比、水/水泥偏高岭土比、凝胶总掺量和养护龄期对水泥复合偏高岭土稳定粉砂土抗压强度的影响规律,归纳了水泥复合... 详细信息

使用低成本高硅铝矿物掺合料可在提升水泥土工程性能的同时降低水泥用量。通过开展系列抗压强度试验研究了水泥偏高岭土掺比、水/水泥偏高岭土比、凝胶总掺量和养护龄期对水泥复合偏高岭土稳定粉砂土抗压强度的影响规律,归纳了水泥复合偏高岭土稳定粉砂土的强度经验公式。结果表明:将水泥和偏高岭土按质量比5∶1混合用于粉砂土稳定时可获得最佳强度提升,节约1/6水泥消耗,且该掺比关系不因凝胶总掺量变化而改变;水泥复合偏高岭土稳定粉砂土抗压强度随水/水泥偏高岭土比增加近似线性降低,随凝胶总掺量增加线性提升,随龄期发展而提高,其28天强度增加趋势仍未趋缓;总结归纳了四个关于强度影响因素的经验预测公式。该研究成果可为水泥偏高岭土用于复合稳定工程软弱土提供理论参考。

关键词：粉砂土强度特性复合稳定水泥偏高岭土经验公式

AlGaN/GaN heterostructure field transistor for label-free detection of DNA hybridization

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Chinese Science Bulletin 2013年第21期58卷 2601-2605页

作者： WEN XueJin wang shengnian wang YuJi LEE Ly James LU Wu Department of Electrical and Computer Engineering The Ohio State University Department of Chemical and Biomedical Engineering The Ohio State University Department of Nanobio Materials and Electronics Gwangju Institute of Science and Technology

This paper demonstrates electrical detection of single strand deoxyribonucleic acid (ssDNA) conjugation by AlGaN/GaN hetero-structure field effect transistor (HFET) biological sensors. The probe ssDNA molecules are modified by thiol groups. The immobilization of probe molecules is achieved by S-Au bonding on a thin layer of gold film in the sensing area. The immobilization and hybridization process are firstly implemented on Si surfaces and checked by fluorescent and atomic force microscopy (AFM) imaging. The hybridization process is monitored on AlGaN/GaN HFETs. Time-dependent current change is observed when a matched ssDNA solution is applied, while no response is observed for a mismatched ssDNA sequence. The DNA hybridization process is dominated by the conjugation between matched ssDNA sequences in the first few tens of seconds. After that, the hybridization process is dominated by mass transfer processes and saturation of the immobilized probe ssDNA molecules.

关键词：异质结场效应晶体管 DNA杂交检测无标记 GaN 单链DNA DNA分子 DNA序列

内部控制缺陷披露如何影响资本市场应计异象?

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南京审计大学学报 2023年第6期20卷 81-90页

作者：孙孟杰王生年石河子大学经济与管理学院新疆石河子832003 石河子大学公司治理与管理创新研究中心新疆石河子832003

基于应计异象视角,利用2012—2020年A股上市公司数据,深入研究内部控制缺陷披露对会计信息定价效率的影响。结果表明,内部控制缺陷披露能够显著缓解A股市场应计异象。进一步分解应计盈余发现,内部控制缺陷披露缓解了投资增长导致的应计... 详细信息

基于应计异象视角,利用2012—2020年A股上市公司数据,深入研究内部控制缺陷披露对会计信息定价效率的影响。结果表明,内部控制缺陷披露能够显著缓解A股市场应计异象。进一步分解应计盈余发现,内部控制缺陷披露缓解了投资增长导致的应计异象,对盈余管理导致的应计异象加剧作用不显著,整体表现为缓解作用。机制检验发现,内部控制缺陷披露的监督治理效应发挥了主要作用,提高了治理水平,缓解了应计异象,高行业内部控制缺陷披露削弱了其缓解作用,内控监管环境的严格强化了两者的关系,缺陷整改信息披露未能引起两者关系的变化。

关键词：内部控制缺陷信息披露盈余管理投资增长应计异象监管环境资本市场