检索结果-南通市图书馆

非线性漂移的Fokker-Planck方程的近似非定态解

在线全文

学校读者我要写书评

暂无评论

物理学报 2013年第18期62卷 38-45页

作者：杨会会宁丽娟陕西师范大学数学与信息科学学院西安710062

研究了由高斯白噪声和色噪声作用下的非线性动力学系统的不稳定态演化问题.在弱噪声极限下,运用本征值本征矢理论得到了非定态解ρ(x,t)的近似表达式;分析了色噪声自关联时间τ,强度α对ρ(x,t)以及对一、二阶矩的影响.数值模拟发现:1)... 详细信息

研究了由高斯白噪声和色噪声作用下的非线性动力学系统的不稳定态演化问题.在弱噪声极限下,运用本征值本征矢理论得到了非定态解ρ(x,t)的近似表达式;分析了色噪声自关联时间τ,强度α对ρ(x,t)以及对一、二阶矩的影响.数值模拟发现:1)t在一定范围内,ρ(x,t)是变量x和t的单调函数,且随τ的增大而增大,反之,随α的增大而减小;2)一阶矩是τ和α的单调函数,但二阶矩却是非单调函数,在参数影响下发生了相变现象.

关键词：奥恩斯坦乌伦贝克过程本征值本征矢非定态解

Ideal Bi‑Based Hybrid Anode Material for Ultrafast Charging of Sodium‑Ion Batteries at Extremely Low Temperatures

在线全文

学校读者我要写书评

暂无评论

Nano-Micro Letters 2025年第3期17卷 152-167页

作者： Jie Bai Jian hui Jia Yu Wang Chun Cheng yang Qing Jiang Key Laboratory of Automobile Materials(Jilin University) Ministry of EducationSchool of Materials Science and EngineeringJilin UniversityChangchun 130022People’s Republic of China

Sodium-ion batteries have emerged as competitive substitutes for low-temperature applications due to severe capacity loss and safety concerns of lithium-ion batteries at−20°C or ***,the key capability of ultrafast charging at ultralow temperature for SIBs is rarely ***,a hybrid of Bi nanoparticles embedded in carbon nanorods is demonstrated as an ideal material to address this issue,which is synthesized via a high temperature shock *** a hybrid shows an unprecedented rate performance(237.9 mAh g^(−1)at 2 A g^(−1))at−60℃,outperforming all reported SIB anode *** with a Na_(3)V_(2)(PO_(4))_(3)cathode,the energy density of the full cell can reach to 181.9 Wh kg^(−1)at−40°*** on this work,a novel strategy of high-rate activation is proposed to enhance performances of Bi-based materials in cryogenic conditions by creating new active sites for interfacial reaction under large current.

关键词： Bi nanoparticles High temperature shock High-rate activation Ultrafast charging Low-temperature sodium-ion batteries

Decoding the nexus:branched-chain amino acids and their connection with sleep,circadian rhythms,and cardiometabolic health

维普期刊数据库评论

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Neural Regeneration Research 2025年第5期20卷 1350-1363页

作者： hui Li Laurent Seugnet Department of Neurology Xijing HospitalXi’anShaanxi ProvinceChina Centre de Recherche en Neurosciences de Lyon Integrated Physiology of the Brain Arousal Systems(WAKING)UniversitéClaude Bernard Lyon 1INSERM U1028CNRS UMR 5292BronFrance

The sleep-wake cycle stands as an integrative process essential for sustaining optimal brain function and,either directly or indirectly,overall body health,encompassing metabolic and cardiovascular *** the heightened metabolic activity of the brain,there exists a considerable demand for nutrients in comparison to other *** these,the branched-chain amino acids,comprising leucine,isoleucine,and valine,display distinctive significance,from their contribution to protein structure to their involvement in overall metabolism,especially in cerebral *** the first amino acids that are released into circulation post-food intake,branched-chain amino acids assume a pivotal role in the regulation of protein synthesis,modulating insulin secretion and the amino acid sensing pathway of target of ***-chain amino acids are key players in influencing the brain's uptake of monoamine precursors,competing for a shared *** their involvement in protein synthesis,these amino acids contribute to the metabolic cycles ofγ-aminobutyric acid and glutamate,as well as energy ***,they impact GABAergic neurons and the excitation/inhibition *** rhythmicity of branchedchain amino acids in plasma concentrations,observed over a 24-hour cycle and conserved in rodent models,is under circadian clock *** mechanisms underlying those rhythms and the physiological consequences of their disruption are not fully *** sleep,obesity,diabetes,and cardiovascular diseases can elevate branched-chain amino acid concentrations or modify their oscillatory *** mechanisms driving these effects are currently the focal point of ongoing research efforts,since normalizing branched-chain amino acid levels has the ability to alleviate the severity of these *** this context,the Drosophila model,though underutilized,holds promise in shedding new light on these *** findings indicate its po

关键词： branched-chain amino acids cardiovascular health circadian clock drosophila insulin metabolism sleep γ-aminobutyric acid

Effect of Shen-Fu Injection(参附注射液)on Hemodynamics in Early Volume Resuscitation Treated Septic Shock Patients

在线全文

学校读者我要写书评

暂无评论

Chinese Journal of Integrative Medicine 2019年第1期25卷 59-63页

作者： FAN Kai-liang WANG Jun-hui KONG Li ZHANG Fei-hu HAO Hao ZHAO Hao TIAN Zheng-yun YIN Ming-xin FANG Hua yang hui-hui LIU yang Department of Emergency the Affiliated Hospital of Shandong University of Traditional Chinese Medicine First Clinical College Shandong University of Traditional Chinese Medicine

Objective: To investigate the hemodynamic effect of Shen-Fu Injection(参附注射液, SFI) in early volume resuscitation treated septic shock patients by monitoring pulse indicator continuous cardiac output(PICCO). Methods: All septic shock patients admitted in the Intensive Care Unit of the Affiliated Hospital of Shandong University of Traditional Chinese Medicine from January 1 st, 2014 to December 31 th, 2015, were reviewed, and totally 65 were enrolled in this study. They were assigned to SFI group(33 cases) and control group(32 cases). All 65 patients underwent conventional treatment mainly including volume resuscitation, antibiotics and vasoactive drugs therapy. The patients of the SFI group received additional 100 mL of SFI intravenously every 12 h. In all 65 patients, the PICCO arterial catheter and vein catheter were implanted within 1 h after the diagnosis of septic shock. In the course of early volume resuscitation, hemodynamic data of patients were recorded by PICCO monitor at 0, 12, and 24 h after the catheter implantation. Results: The hemodynamic indices of the two groups showed no significant differences at the beginning of 0 h(P>0.05). At 12 and 24 h, the hemodynamic indices of SFI group were significantly improved in comparison with the control group(P0.05). Conclusion: SFI significantly improved hemodynamic indices such as CI, GEDI, MAP and HR in early volume resuscitation treated septic shock patients.

关键词： septic shock hemodynamic Shen-Fu Injection Chinese medicine pulse indicator continuous cardiac output

Does Equity-based Compensation Add Value? Evidence from China’s Emerging Market Economy

在线全文

学校读者我要写书评

暂无评论

Does Equity-based Compensation Add Value? Evidence from Chin...

中国对外经济贸易会计学会2013年学术年会

作者： yang hui-hui Kenneth A.Carow School of Accounting Shanghai University of International Business and Economics Kelley School of Business Indiana University

In 2006 the Chinese Securities Regulatory Commission permitted equity-based *** the three-day event window surrounding the regulatory announcement and subsequent firm announcements of equity-based compensation plans,stock values increase approximately 20%.Comparing stock and accounting performance to a matched sample of firms not adopting equitybased compensation,firm performance drops during the period between the announcement and plan implementation（consistent with managerial power）,but performance increases following plan implementation（consistent with convergence of interest）.Investors anticipate improved performance following the implementation of equity-based compensation;however,faster adoption processes may reduce the underperformance between the firm announcement and final implementation.

关键词： equity-based compensation China convergence of interest managerial power

来源： cnki会议评论

在线全文

cnki会议

学校读者我要写书评

暂无评论

作业基础业绩评价体系的构建

中南财经政法大学学报 2005年第6期 95-100页

作者：杨慧辉上海对外贸易学院经贸学院上海201620

作业基础内部业绩评价体系是在传统责任会计理论基础上发展起来的作业基础责任会计制度,它以作业为基础,通过作业动因对企业内部各责任中心的再认识和再划分,利用作业管理基本理论和方法,依据作业价值链对责任中心进行管理和考核。作业... 详细信息

作业基础内部业绩评价体系是在传统责任会计理论基础上发展起来的作业基础责任会计制度,它以作业为基础,通过作业动因对企业内部各责任中心的再认识和再划分,利用作业管理基本理论和方法,依据作业价值链对责任中心进行管理和考核。作业基础责任会计是责任会计自身理论和实践的发展与完善,是对企业内部业绩评价的一种全新的改革。

关键词：作业管理责任会计业绩评价

环境管制方式对能源效率影响的差异性——基于内生视角下的PVAR方法的分析

在线全文

学校读者我要写书评

暂无评论

商业研究 2019年第7期 67-76页

作者：杨慧慧首都经济贸易大学经济学院河南师范大学商学院

环境管制作为政府环境管理的重要手段,其相关节能减排措施必然会影响到企业的能源使用效率。本文在微观经济理论分析的基础上,基于内生视角的PVAR数据模型,以2000-2016年中国省际面板数据实证检验环境管制与能源效率之间的长期均衡关系... 详细信息

环境管制作为政府环境管理的重要手段,其相关节能减排措施必然会影响到企业的能源使用效率。本文在微观经济理论分析的基础上,基于内生视角的PVAR数据模型,以2000-2016年中国省际面板数据实证检验环境管制与能源效率之间的长期均衡关系与变动效应。研究发现:命令控制型环境管制方式对能源效率有正向促进作用和较强的正向冲击,经济激励型环境管制方式对能源效率也有正向促进作用,但正向冲击强度不大,自愿意识型环境管制方式统计上不显著,且呈负向冲击;但从方差分解各种管制方式对能源效率增长的长期累积贡献来看,自愿意识型环境管制的贡献均高于其他两种方式。上述结论表明,环境管制对于能源效率提高有一定影响,未来管制方式要从命令控制到经济激励和自愿意识的多元化方向发展。

关键词：环境管制能源效率内生性 PVAR

绝经后2型糖尿病患者骨密度与骨代谢标志物的相关分析

在线全文

学校读者我要写书评

暂无评论

中华老年医学杂志 2013年第11期32卷 1206-1208页

作者：阚全娥河南省人民医院内分泌科郑州450003

目的探讨绝经后2型糖尿病患者的骨密度变化与N-端骨钙素（N-MID）、总1型胶原氨基端延长肽（T-P1NP）、B-胶原特殊序列（β-CTX）、25羟维生素D水平〈25（OH）Ds]及胰岛素样生长因子-1（IGF-1）的相关性。方法选取绝经后女性2型糖尿病患... 详细信息

目的探讨绝经后2型糖尿病患者的骨密度变化与N-端骨钙素（N-MID）、总1型胶原氨基端延长肽（T-P1NP）、B-胶原特殊序列（β-CTX）、25羟维生素D水平〈25（OH）Ds]及胰岛素样生长因子-1（IGF-1）的相关性。方法选取绝经后女性2型糖尿病患者116例，根据骨密度水平进行分3组，骨量正常组29例、骨量减少组49例和骨质疏松组38例。测量患者身高、体质量，计算体质指数。测定患者空腹血糖（FBG）、餐后2h血糖（PPG）、糖化血红蛋白（HbAlc）及24h尿蛋白定量（U-PRO），测定3组患者的N-MID、T-P1NP、BCTX、25（OH）D。及IGF-1的水平，比较3组患者-般临床资料和骨代谢指标并进行统计学分析。结果3组患者的FBG、PPG、HbAlc、病程及25（0H）D。差异无统计学意义（P〉0．05）；与骨量正常组比较，骨量减少组和骨质疏松组的体质指数、IGF-1的水平降低（P〈0．05），T-P1NP、N-MID水平降低（19．85±2．83）txg／L与（12．23±2．75）μg／L、（9．16±2．86）μg／L．（均P〈0．05），（7．12±2．05）μg／L与（5．06±2．38）μg／L、（4．92±2．12）μg／L（均P〈0．05）；24hUPro升高（P〈0．05），8-CTX升高（1．32±0．38）μg／L与（1．97±0．58）μg／L、（2．14±0．73）μg／I．（均P〈0．05）；Logistic回归分析结果显示，骨密度与T-P1NP、IGF-1、25（OH）D3、N-MID、体质指数呈正相关（r值分别为0．35l、0．217、0．213、0．273、0．203，P值分别为0．001、0．01l、0．012、0．001、0．012），与8-CTX、24hUPro呈负相关（r值分别为-0．236±0．216，P值分别为0．013、0．015）。结论绝经后2型糖尿病患者易合并骨量减少或骨质疏松，其骨密度变化与骨代谢标志物及IGF-1水平密切相关，对绝经后2型糖尿病患者应进行常规检测，及早防治，避免骨折的发生。

关键词：糖尿病 2型骨密度骨质疏松骨钙素

两大股权激励方式激励作用的比较研究--基于厌恶经理人的委托代理模型分析

在线全文

学校读者我要写书评

暂无评论

经济经纬 2008年第2期25卷 109-113页

作者：杨慧辉东华大学旭日工商管理学院上海200051 上海对外贸易学院上海201620

笔者采用委托代理模型,以股东为风险中性、经理人为风险厌恶为基本假设,分析了限制性股票和股票期权两种股权激励形式的激励作用。结果显示,当限制性股票无偿赠送给经理人时,股票期权的激励作用大于股票的激励作用;为激励经理人采取股... 详细信息

笔者采用委托代理模型,以股东为风险中性、经理人为风险厌恶为基本假设,分析了限制性股票和股票期权两种股权激励形式的激励作用。结果显示,当限制性股票无偿赠送给经理人时,股票期权的激励作用大于股票的激励作用;为激励经理人采取股东希望的行动,股票期权对股东的经济成本低于限制性股票对股东的经济成本。这一结论为我国股权分置改革后上市公司选择股权激励方式提供了一定的理论借鉴。

关键词：限制性股票股票期权报酬—业绩敏感度确定性等价