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风险投资与企业ESG表现

科学决策 2024年第4期 1-21页

作者：李志斌李敏诗许莲艳缪申培扬州大学商学院

在“双碳”目标的大背景下,ESG已经成为企业可持续发展的战略选择。风险资本作为一类特殊的机构投资者,对企业的ESG决策和行为存在重要影响。以2010—2021年沪深两市首次公开发行的A股上市公司为研究样本,实证研究风险投资对企业ESG表... 详细信息

在“双碳”目标的大背景下,ESG已经成为企业可持续发展的战略选择。风险资本作为一类特殊的机构投资者,对企业的ESG决策和行为存在重要影响。以2010—2021年沪深两市首次公开发行的A股上市公司为研究样本,实证研究风险投资对企业ESG表现的影响。研究发现,风险投资对企业ESG表现存在显著的负向影响,验证了风险资本的“逐名”假说。进一步分析表明,风险资本联合、风险资本声誉较高、风险资本有外资背景等因素显著地抑制了风险投资对企业ESG表现的负向作用。研究结论拓展了企业ESG表现影响因素的相关研究,为强化政府对风险资本的正确引导,以及企业提高ESG表现提供了有益的思路和启示。

关键词：风险投资企业ESG表现风险资本特征

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Purity of SiC powders fabricated by coat-mix

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International Journal of minerals,Metallurgy and Materials 2009年第2期16卷 230-235页

作者： li-min shi Hong-sheng Zhao Chun-he Tang Institute of Nuclear and New Energy Technology Tsinghua University Beijing 100084 China

Silicon carbide powders were synthesized by the coat-mix process, with phenolic resin and silicon powders as starting materials. The effects of synthetic conditions, including sintering temperature and the molar ratio of resin-derived carbon to silicon on the composition and the purity of the resultant powders were investigated. The results show that a higher sintering temperature and an appropriate molar ratio of resin-derived carbon to silicon are favorable for producing high purity silicon carbide powders. It is found that the silicon carbide content increases slightly with increasing the sintering temperature during the solid-solid reaction. The temperature gradient plays an important role on this trend. When the sintering temperature is raised up to 1500℃, the formation of silicon earbide is based on the liquid-solid reaction, and high purity （99.8wt%） silicon carbide powders can easily be obtained. It can also be found that the optimum molar ratio of resin-derived carbon to silicon is 1：1.

关键词： silicon carbide powders coat-mix purity

调神针法对带状疱疹后遗神经痛患者疼痛程度、负性情绪和睡眠质量的影响

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针刺研究 2024年第5期49卷 499-505页

作者：徐纬张祖勇孙丹严永兴张艳李世民陈周阳浙江省杭州市第三人民医院康复医学科杭州310009 浙江省杭州市第三人民医院神经外科杭州310009 浙江省杭州市第三人民医院神经内科杭州310009

目的:观察调神针法对带状疱疹后遗神经痛(PHN)患者疼痛程度、睡眠质量、负性情绪的影响,评价调神针法联合阿是穴围刺、重灸治疗PHN的临床疗效。方法:将PHN患者随机分为对照组(35例,脱落2例)和综合组(35例)。对照组采用阿是穴围刺配合重... 详细信息

目的:观察调神针法对带状疱疹后遗神经痛(PHN)患者疼痛程度、睡眠质量、负性情绪的影响,评价调神针法联合阿是穴围刺、重灸治疗PHN的临床疗效。方法:将PHN患者随机分为对照组(35例,脱落2例)和综合组(35例)。对照组采用阿是穴围刺配合重灸治疗,综合组在此基础上施以调神针法,两组每日治疗1次,6 d为1个疗程,疗程间休息1 d,共治疗2个疗程。分别在治疗前后采用疼痛分级指数(PRI)、视觉模拟量尺(VAS)评分和现有疼痛强度(PPI)评分评估两组患者疼痛情况;采用汉密尔顿焦虑量表(HAMA)、汉密尔顿抑郁量表(HAMD)评估患者负性情绪;采用匹兹堡睡眠量表(PSQI)评估患者睡眠质量。记录患者治疗前和治疗结束后1周内的平均睡眠时间。对两组作疗效评估。在治疗结束2个月后对两组有效病例随访,评估记录神经痛复发情况。结果:两组患者治疗前的各项指标差异无统计学意义,具有可比性。治疗后,两组患者PRI、VAS、PPI、HAMA、HAMD、PSQI评分均较治疗前降低(P<0.05),平均睡眠时间增加(P<0.05);两组组间比较,综合组PRI、VAS、PPI、HAMA、HAMD、PSQI评分及平均睡眠时间的改善均优于对照组(P<0.05)。综合组总有效率(34/35,97.14%)高于(P<0.05)对照组(27/33,81.82%),复发率(2/34,5.88%)远低于(P<0.05)对照组(8/27,29.63%)。结论:调神针法联合阿是穴围刺、重灸可以有效缓解PHN,相比单纯阿是穴围刺、重灸,该疗法改善疼痛程度、睡眠质量、负性情绪的效果更好,且可减少复发。

关键词：针刺调神围刺重灸带状疱疹后遗神经痛

Experimental and Numerical Study on the Bubble Dynamics near Two-Connected Walls with An Obtuse Angle

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China Ocean Engineering 2020年第6期34卷 828-839页

作者： li shi-min CUI Pu ZHANG Shuai liU Wen-tao PENG Yu-xiang College of shipbuilding Engineering Harbin Engineering UniversityHarbin 150001China

This study is concerned with the dynamic characteristics of bubbles near two connected walls(one horizontal and the other inclined with an obtuse angle from the horizontal one). In this study, we set up an experiment system to conduct typical cases, and the boundary element method is employed to explain the bubble behavior and study the effect of relative parameters. Comparing the two mutually perpendicular walls, we find that the liquid jet deviates from the horizontal direction within a much shorter range. On the intersection of the two walls, the motions of bubbles have similar trends. The relatively low pressure between the bubble and walls causes the transition of the bubble, and a local high-pressure zone leads to the formation of a liquid jet. Moreover, there are moments when the two walls are evenly stressed in the first bubble cycle. Through parameter analysis, we find that the jet directions of bubbles perform interesting discrepancies for different buoyancy and distances to walls. Some instructive conclusions are given to serve practical applications.

关键词： bubble dynamics solid walls liquid jets

Physiological and pathological functions of circular RNAs in the nervous system

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Neural Regeneration Research 2024年第2期19卷 342-349页

作者： min Zhou shi li Chuan Huang School of life Sciences Chongqing UniversityChongqingChina

Circular RNAs(circRNAs)are a class of covalently closed single-stranded RNAs that are expressed during the development of specific cells and *** play crucial roles in physiological and pathological processes by sponging microRNAs,modulating gene transcription,controlling the activity of certain RNA-binding proteins,and producing functional peptides.A key focus of research at present is the functionality of circRNAs in the nervous system and several advances have emerged over the last 2 ***,the precise role of circRNAs in the nervous system has yet to be comprehensively *** this review,we first summarize the recently described roles of circRNAs in brain development,maturity,and ***,we focus on the involvement of circRNAs in various diseases of the central nervous system,such as brain cancer,chronic neurodegenerative diseases,acute injuries of the nervous system,and neuropathic pain.A better understanding of the functionality of circRNAs will help us to develop potential diagnostic,prognostic,and therapeutic strategies to treat diseases of the nervous system.

关键词： Alzheimer’s disease amyotrophic lateral sclerosis brain development circRNAs neuropathic pain Parkinson’s disease

A general central limit theorem under sublinear expectations

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Science China Mathematics 2010年第8期53卷 1989-1994页

作者： li min & shi YuFeng School of Mathematics,Shandong University,Jinan 250100,China School of Mathematics Shandong University Jinan China

Under some weaker conditions,we give a central limit theorem under sublinear expectations,which extends Peng's central limit theorem.

关键词： central limit theorem sublinear expectation G-normal distribution

护士-患者-照护者协同康复训练在促进腰椎骨折伴脊髓损伤患者康复中的作用分析

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颈腰痛杂志 2024年第2期45卷 348-351页

作者：李诗敏刘美帅张彩霞空军军医大学第二附属医院骨科手术室陕西西安720038

目的探讨护士-患者-照护者协同康复训练在促进腰椎骨折伴脊髓损伤(spinal cord injury,SCI)患者康复中的作用。方法使用随机数表法将2022年1月-2023年1月在空军军医大学第二附属医院就诊的68例腰椎骨折伴SCI患者分为对照组(n=34)和观察... 详细信息

目的探讨护士-患者-照护者协同康复训练在促进腰椎骨折伴脊髓损伤(spinal cord injury,SCI)患者康复中的作用。方法使用随机数表法将2022年1月-2023年1月在空军军医大学第二附属医院就诊的68例腰椎骨折伴SCI患者分为对照组(n=34)和观察组(n=34)。给予对照组常规护理,在此基础上给予观察组护士-患者-照护者协同康复训练干预。比较两组干预前后自我护理能力测量表(exercise of self-care agency scale,ESCA)评分、家庭支持自评量表(family support scale,PSS-Fa)评分、改良Barthel指数(modified barthel index,MBI)、功能独立性评定量表(function independent measure,FIM)评分。结果干预后,两组ESCA评分、PSS-Fa评分、MBI指数和FIM评分均显著上升(P<0.05),且观察组干预后ESCA评分、PSS-Fa评分、MBI指数和FIM评分均显著高于对照组(P<0.05)。结论护士-患者-照护者协同康复训练可有效提高腰椎骨折伴SCI患者自护能力和家庭支持水平,对于提高康复训练效果、促进患者自主生活能力恢复有积极作用。

关键词：腰椎骨折脊髓损伤护士-患者-照护者协同康复训练自护能力家庭支持康复水平

Moderate Deviations for Parameter Estimation in the Fractional Ornstein–Uhlenbeck Processes with Periodic Mean

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Acta Mathematica Sinica,English Series 2024年第5期40卷 1308-1324页

作者： Hui JIANG shi min li Wei Gang WANG School of Mathematics Nanjing University of Aeronautics and AstronauticsNanjing 210016P.R.China The People's Bank of China Operations Ofice of Nanjing Branch Nanjing 210016P.R.China School of Statistics and Mathematics Zhejiang Gongshang UniversityHangzhou 310018P.R.China

In this paper,we study the asymptotic properties for the drift parameter estimators in the fractional Ornstein-Uhlenbeck process with periodic mean function and long range *** Cremér-type moderate deviations,as well ... 详细信息

关键词： Cramér-type moderate deviation fractional Ornstein-Uhlenbeck process parameter estimation multiple Wiener-Ito integrals

Catalytic combustion of methane over nano ZrO_2-supported copper-based catalysts

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Chinese Chemical Letters 2007年第8期18卷 993-996页

作者： Fen Fen Qua Wei Chu li min shi Mu Hua Chen Jin Yan Hu Department of Environmental Science and Engineering Sichuan University Chengdu 610065 China Department of Chemical Engineering Sichuan University Chengdu 610065 China

The nano ZrO2-supported copper-based catalysts for methane combustion were investigated by means of N2 adsorption, TEM, XRD, H2-TPR techniques and the test of methane oxidation. Two kinds of ZrO2 were used as support, one （ZrO2-1） was obtained from the commercial ZrO2 and the other （ZrO2-2） was issued from the thermal decomposition of zirconium nitrate. It was found that the CuO/ZrO2-2 catalyst was more active than CuO/ZrO2-1. N2 adsorption, H2-TPR and XRD measurements showed that larger surface area, better reduction property, presence of tetragonal ZrO2 and higher dispersion of active component for CuO/ZrO2-2 than that of CuO/ZrO2-1. These factors could be the dominating reasons for its higher activity for methane combustion.

关键词： Nano ZrO2 Copper-based catalysts Catalytic combustion Methane