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供应链溢出效应下企业数字化转型的动因研究

管理学报 2024年第6期21卷 938-947页

作者：刘晨王俊秋花贵如上海立信会计金融学院会计学院华东理工大学商学院

基于企业-客户关系数据,从供应链溢出视角探究企业数字化转型的动因。以2010~2020年沪深A股上市公司为样本,研究发现,客户数字化转型具有供应链溢出效应,能够驱动企业数字化转型,上述结果主要体现在资源基础和动态能力处于中等水平、客... 详细信息

基于企业-客户关系数据,从供应链溢出视角探究企业数字化转型的动因。以2010~2020年沪深A股上市公司为样本,研究发现,客户数字化转型具有供应链溢出效应,能够驱动企业数字化转型,上述结果主要体现在资源基础和动态能力处于中等水平、客户集中度较高以及与客户地理距离较近的企业。进一步检验发现,客户数字化转型通过倒逼效应和资源效应驱动企业数字化转型,且当客户数字化转型程度较高时,企业数字化转型对其市场地位的提升作用更加明显。

关键词：数字化转型供应链溢出市场地位

Multilevel Micro Structures of the Clam Make the Sealing Even Tighter

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Journal of Bionic Engineering 2024年第3期21卷 1442-1452页

作者： Daobing Chen Xiaolong Zhang junqiu Zhang Zhiwu Han Ruteng wang Zhen Lin Yifeng Lei Longjian Xue Sheng Liu The Institute of Technological Science Wuhan UniversityWuhan430072China School of Power and Mechanical Engineering Wuhan UniversityWuhan430072China The Key Laboratory of Bionic Engineering(Ministry of Education) Jilin UniversityChangchun130022China Institute of Structured and Architected Materials Liaoning Academy of MaterialsShenyang110167China

Excellent fluid sealing performance is crucial to ensuring the safety of important equipment,especially in aerospace field,such as space capsule and fuel *** frequently opening and closing of the sealing devices is particularly *** by this background,clams(Mactra chinensis)which can open and close their double shells with superior sealing performance,are studied in this ***,we show that the clam’s sealing ability is the result of its unique multilevel intermeshing microstructures,including hinge teeth and *** microstructures,which resemble gear teeth,engage with each other when the shell closes,forming a tight structure that prevents the infiltration of water from the ***,the presence of micron blocks prevents the penetration of finer *** simulation results of the bionic end seal components show that the multilevel microstructure has a superior sealing *** research is expected to be applied to undersea vehicles that require frequent door opening and closing.

关键词： Multilevel micro structures Opening and closing components Clam Sealing Bionic

Frequency-comb-linearized, widely tunable lasers for coherent ranging

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Photonics Research 2024年第4期12卷 663-681页

作者： BAOQI SHI YI-HAN LUO WEI SUN YUE HU JINBAO LONG XUE BAI ANTING wang junqiu LIU Department of Optics and Optical Engineering University of Science and Technology of ChinaHefei 230026China International Quantum Academy Shenzhen 518048China Shenzhen Institute for Quantum Science and Engineering Southern University of Science and TechnologyShenzhen 518055China Hefei National Laboratory University of Science and Technology of ChinaHefei 230088China

Tunable lasers,with the ability to continuously vary their emission wavelengths,have found widespread applications across various fields such as biomedical imaging,coherent ranging,optical communications,and *** these applications,a wide chirp range is advantageous for large spectral coverage and high frequency ***,the frequency accuracy and precision also depend critically on the chirp linearity of the *** extensive efforts have been made on the development of many kinds of frequency-agile,widely tunable,narrow-linewidth lasers,wideband yet precise methods to characterize and linearize laser chirp dynamics are also *** we present an approach to characterize laser chirp dynamics using an optical frequency *** instantaneous laser frequency is tracked over terahertz bandwidth at 1 MHz *** this approach we calibrate the chirp performance of 12 tunable lasers from Toptica,Santec,New Focus,EXFO,and NKT that are commonly used in fiber optics and integrated *** addition,with acquired knowledge of laser chirp dynamics,we demonstrate a simple frequency-linearization scheme that enables coherent ranging without any optical or electronic linearization *** approach not only presents novel wideband,highresolution laser spectroscopy,but is also critical for sensing applications with ever-increasing requirements on performance.

关键词： tunable Focus coherent

Strategies of Response to Public Concerns during Public Emergencies in the Context of Modern Governance:Taking COVID-19 Pandemic as an Example

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学术界 2020年第4期 203-212页

作者： Kong Zeming wang junqiu College of the Humanities Jilin University Changchun Jilin 130012

Public emergencies are generally sudden with huge real or potential danger to the whole *** COVID-19 pandemic is a typical public emergency with a long duration involving a wide range of people,and has extremely bad social *** pandemic can be classified into four stages:initial stage,outbreak stage,durative stage and post-pandemic *** focus of mass media varied according to the characteristics of different *** on different stages,mass media should change their roles timely and always be aware of the mainstream ideological construction in public opinions to firmly control the direction of public opinion by using the theory and method of communication.

关键词： public emergencies response to public concerns COVID-19 pandemic

A wideband,high-resolution vector spectrum analyzer for integrated photonics

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Light(Science & Applications) 2024年第4期13卷 760-771页

作者： Yi-Han Luo Baoqi Shi Wei Sun Ruiyang Chen Sanli Huang Zhongkai wang Jinbao Long Chen Shen Zhichao Ye Hairun Guo junqiu Liu International Quantum Academy 518048 ShenzhenChina. Shenzhen Institute for Quantum Science and Engineering Southern University of Science and Technology518055 ShenzhenChina. Department of Optics and Optical Engineering University of Science and Technology of China230026 HefeiChina. Hefei National Laboratory University of Science and Technology of China230088 HefeiChina. Qaleido Photonics 518048 ShenzhenChina. Key Laboratory of Specialty Fiber Optics and Optical Access Networks Shanghai University200444 ShanghaiChina

The analysis of optical spectra—emission or absorption—has been arguably the most powerful approach for discovering and understanding *** invention and development of many kinds of spectrometers have equipped us with versatile yet ultra-sensitive diagnostic tools for trace gas detection,isotope analysis,and resolving hyperfine structures of atoms and *** proliferating data and information,urgent and demanding requirements have been placed today on spectrum analysis with ever-increasing spectral bandwidth and frequency *** requirements are especially stringent for broadband laser sources that carry massive information and for dispersive devices used in information processing *** addition,spectrum analyzers are expected to probe the device’s phase response where extra information is *** we demonstrate a novel vector spectrum analyzer(VSA)that is capable of characterizing passive devices and active laser sources in one *** a dual-mode VSA can measure loss,phase response,and dispersion properties of passive *** also can coherently map a broadband laser spectrum into the RF *** VSA features a bandwidth of 55.1 THz(1260–1640 nm),a frequency resolution of 471 kHz,and a dynamic range of 56 ***,our fiber-based VSA is compact and *** requires neither high-speed modulators and photodetectors nor any active feedback ***,we employ our VSA for applications including characterization of integrated dispersive waveguides,mapping frequency comb spectra,and coherent light detection and ranging(LiDAR).Our VSA presents an innovative approach for device analysis and laser spectroscopy,and can play a critical role in future photonic systems and applications for sensing,communication,imaging,and quantum information processing.

关键词： spectrum resolution coherent

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经济政策不确定性与年报风险信息披露

会计与经济研究 2023年第6期37卷 127-143页

作者：王俊秋曹雪邱穆青华东理工大学商学院上海200237

随着外部环境不确定性的增加,投资者对风险信息的需求日益增多,而中国上市公司年报风险信息披露呈现较大差异,探讨其动因对于鼓励企业披露风险信息具有重要意义。基于此,文章从经济政策不确定性视角,考察不确定性环境下公司年报风险信... 详细信息

随着外部环境不确定性的增加,投资者对风险信息的需求日益增多,而中国上市公司年报风险信息披露呈现较大差异,探讨其动因对于鼓励企业披露风险信息具有重要意义。基于此,文章从经济政策不确定性视角,考察不确定性环境下公司年报风险信息披露的动机及效果。利用2007-2019年A股上市公司年报风险信息披露的文本数据,研究发现,经济政策不确定性与年报风险信息披露显著正相关;当经济政策不确定性提高时,基础风险高的公司选择披露更多的总体风险信息和宏观风险信息,融资约束大的公司选择增加总体风险信息披露。进一步研究发现,经济政策频繁波动将加剧资本市场的信息不对称程度,表现为买卖价差和股价崩盘风险的显著增加,此时公司选择披露更多风险信息有助于缓解不确定性引发的信息不对称。研究对于理解经济政策不确定性环境下公司年报风险信息披露行为及其经济后果具有启示意义。

关键词：经济政策不确定性风险信息披露信息不对称融资约束

Dimethyl Sulfoxide/Visible-Light Comediated Chemoselective C-S Bond Formation Between Tryptophans and Thiophenols Enables Site-Selective Functionalization of Peptides

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CCS Chemistry 2024年第6期6卷 1547-1556页

作者： Guangjun Bao Peng wang Jingyue Li Xinyi Song Tingli Yu Jiao Zhang Yiping Li Zeyuan He Ruiyao E Xiaokang Miao junqiu Xie Jingman Ni Rui wang wangsheng Sun Key Laboratory of Preclinical Study for New Drugs of Gansu Province School of Basic Medical Sciences&Research Unit of Peptide ScienceChinese Academy of Medical Sciences2019RU066Lanzhou UniversityLanzhou 730000 State Key Laboratory of Bioactive Substance and Function of Natural Medicines Institute of Materia MedicaChinese Academy of Medical Sciences and Peking Union Medical CollegeBeijing 100050

Late-stage peptide modification showcases a huge potential for the construction of peptide libraries,and the investigation of structure-activity *** we report a dimethyl sulfoxide/visible light comediated chemoselective modification of tryptophan residue by forging the C-S structure using thiophenols irradiated with blue light-emitting diodes at room *** method shows excellent chemoselectivity toward the C-2 position of the tryptophan residue and good compatibility with diverse thiophenol derivatives bearing various functional *** protected oligopeptides and unmasked bioactive peptides smoothly underwent site-selective modification,furnishing the corresponding *** all,this study provides a new competent toolkit for late-stage peptide modification,labelling,and peptide-drug conjugation and provides a clue for protein bioconjugation.

关键词： peptide modification late-stage diversification photocatalysis tryptophan thiophenol

异质机构投资者、实地调研与公司财务重述行为

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北京工商大学学报（社会科学版） 2023年第2期38卷 52-63页

作者：徐灿宇王俊秋闫珍丽华东理工大学商学院上海200237 上海对外经贸大学会计学院上海201620

上市公司真实、准确地履行财务信息披露责任,对于保护投资者权益、稳定资本市场具有重要意义。基于2013—2020年中国深圳证券交易所A股上市公司数据,考察了异质机构投资者对公司财务重述行为的影响。研究发现,同交易型机构投资者相比,... 详细信息

上市公司真实、准确地履行财务信息披露责任,对于保护投资者权益、稳定资本市场具有重要意义。基于2013—2020年中国深圳证券交易所A股上市公司数据,考察了异质机构投资者对公司财务重述行为的影响。研究发现,同交易型机构投资者相比,稳定型机构投资者显著抑制了公司财务重述行为,实地调研则强化了上述抑制作用。机制分析表明,稳定型机构投资者通过改善公司信息环境、提高内部控制水平发挥抑制作用。进一步研究发现,稳定型机构投资者对技术问题型和非技术问题型财务重述行为、欺诈型和非欺诈型财务重述行为均有抑制作用,但实地调研仅强化了对非技术问题型和非欺诈型财务重述行为的抑制作用。因此,监管部门应积极引入稳定型机构投资者,完善投资者实地调研的相关制度,从而形成对上市公司会计信息质量的有效外部监督。

关键词：异质机构投资者财务重述实地调研信息环境内部控制

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自动检堵技术在空调器分流器组件上的应用

中国高新科技 2022年第16期 98-99页

作者：汪军求李敏格力电器(合肥)有限公司安徽合肥230088

文章主要针对空调器分流器组件自动检堵技术进行研究与应用,从分流器组件检堵装置的工作原理、结构设计、工艺参数等方面对自动检堵技术的应用进行分析,以解决现有技术中手工检堵作业自动化程度低、劳动强度大、生产效率低等问题。

关键词：自动检堵分流器组件空调器