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僵尸企业占用银行信贷的负外部性--基于商业信用的视角

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当代财经 2021年第3期 124-135页

作者：张栋赵文卓郑州大学商学院河南郑州450001 对外经济贸易大学国际商学院北京100029

妥善处理僵尸企业与各利益主体之间的关系是供给侧结构性改革的重中之重。以2010—2017年沪深A股上市公司为样本,基于商业信用的视角研究了僵尸企业占用银行信贷资金的负外部性。研究发现:僵尸企业占用金融市场的信贷资源越多,其占用产... 详细信息

妥善处理僵尸企业与各利益主体之间的关系是供给侧结构性改革的重中之重。以2010—2017年沪深A股上市公司为样本,基于商业信用的视角研究了僵尸企业占用银行信贷资金的负外部性。研究发现:僵尸企业占用金融市场的信贷资源越多,其占用产品市场的商业信用资金也越多;相对于下游客户,上述影响对僵尸企业的上游供应商更为明显。进一步分析发现:资产专用性越高和所处行业的行业集中度越高的僵尸企业,对商业信用资金占用越严重。机制检验发现:僵尸企业占用银行信贷资金对上下游企业产生的负外部性是由僵尸企业信息透明度低以及偿债能力不足引起的。

关键词：僵尸企业银行信贷商业信用负外部性

Wave effect of gravitational waves intersected with a microlens field Ⅱ:An adaptive hierarchical tree algorithm and population study

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Science China(Physics,Mechanics & Astronomy) 2025年第1期Mechanics & Astronomy) .卷 241-254页

作者： Xikai Shan Guoliang Li Xuechun Chen wen zhao Bin Hu Shude Mao Department of Astronomy Tsinghua University Purple Mountain Observatory Chinese Academy of Sciences Institute for Frontier in Astronomy and Astrophysics Beijing Normal University School of Physics and Astronomy Beijing Normal University School of Astronomy and Space Science University of Science and Technology of China CAS Key Laboratory for Researches in Galaxies and Cosmology Department of Astronomy University of Science and Technology of ChinaChinese Academy of Sciences

The gravitational lensing wave effect generated by a microlensing field embedded in a lens galaxy is an inevitable phenomenon in strong lensed gravitational waves （SLGWs）.This effect presents both challenges and opportunities for the detection and application of ***,investigating this wave effect requires computing a complete diffraction integral over each microlens in the *** is extremely time-consuming due to the large number of microlenses （10～3-10～6）.Therefore,simply adding all the microlenses is ***,the complexity of the time delay surface makes the lens plane resolution a crucial factor in controlling numerical *** this paper,we propose a trapezoid approximation-based adaptive hierarchical tree algorithm to meet the challenges of calculation speed and *** find that this algorithm accelerates the calculation by four orders of magnitude compared to the simple adding method and is one order of magnitude faster than the fixed hierarchical tree algorithm proposed for electromagnetic *** importantly,our algorithm ensures controllable numerical errors,increasing confidence in the *** with our previous work （***.66,239511,2023）,this paper addresses all numerical issues,including integral convergence,precision,and computational time1).Finally,we conducted a population study on the microlensing wave effect of SLGWs using this algorithm and found that the microlensing wave effect cannot be ignored,especially for Type II SLGWs （from saddle position of the time delay surface） due to their intrinsic geometric structures and their typical intersection with a denser microlensing ***,more than 33%（11%） of SLGWs have a mismatch larger than 1%（3%） compared to the unlensed ***,we found that the mismatch between signal pairs in a doubly imaged GW is generally larger than 10-3,and 61%（25%） of signal pairs have a mismatch larger than 1%（3%）.Therefo

关键词： gravitational lensing diffractional integral algorithm gravitational wave

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BPMN 2.0编排的形式语义和分析

软件学报 2018年第4期29卷 1094-1114页

作者：代飞赵文卓杨云莫启李彤周华西南林业大学大数据与人工智能工程学院云南昆明650091 云南大学软件学院云南昆明650091 云南省软件工程重点实验室云南昆明650091

BPMN 2.0编排已成为描述业务流程间交互事实上的标准.BPMN 2.0编排面向流的特征,使之会产生控制流方面的语义错误.因此,检查编排语义正确性是BPMN 2.0编排建模工具所期望具有的功能.但是,BPMN 2.0标准规约中的编排缺少形式语义及相应的... 详细信息

BPMN 2.0编排已成为描述业务流程间交互事实上的标准.BPMN 2.0编排面向流的特征,使之会产生控制流方面的语义错误.因此,检查编排语义正确性是BPMN 2.0编排建模工具所期望具有的功能.但是,BPMN 2.0标准规约中的编排缺少形式语义及相应的分析技术,这阻碍了对BPMN 2.0编排的语义分析.提出了一种映射,用于将BPMN 2.0编排转换为工作流网,使用Petri网来形式化定义BPMN 2.0编排的语义.借助Petri网的分析技术,这种定义的语义可用来分析BPMN 2.0编排的结构和控制流方面的错误.该映射和语义分析已被实现为一种工具.实验结果表明,这种形式化可以识别BPM AI过程模型库中编排的语义错误.

关键词：业务流程建模标注2.0 编排 Petri网形式语义语义分析

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双臂对称性对关联成像算法的影响

量子光学学报 2016年第1期22卷 14-20页

作者：陶忠良赵文卓赵丹吉林化工学院吉林132102

为了分析在实际成像过程中双臂误差对不同关联成像算法的影响。理论上推导了双臂横向误差和轴向误差对传统关联成像算法(Ghost Imaging,GI),差分关联成像(Differential Ghost Imaging,DGI)和基于压缩感知的关联成像算法(Compressive Sen... 详细信息

为了分析在实际成像过程中双臂误差对不同关联成像算法的影响。理论上推导了双臂横向误差和轴向误差对传统关联成像算法(Ghost Imaging,GI),差分关联成像(Differential Ghost Imaging,DGI)和基于压缩感知的关联成像算法(Compressive Sensing Ghost Imaging,CSGI)的影响;在不同的双臂横向误差和轴向误差下利用三种算法分别对灰度图像Lena和二值图像Stripes进行了重构仿真实验,并将重构结果的峰值信噪比(peak signal to noise ratio,PSNR)进行对比。当双臂横向行列均错位4个像素点时,Lena的GI重构结果PSNR最多下降0.766dB,DGI下降2.928dB,CSGI下降5.858dB;Stripes的GI重构结果PSNR最多降低0.644 2dB,DGI降低0.943dB,CSGI降低5.975dB;随着双臂轴向误差的增大,Lena的GI重构最多降低了0.895dB,DGI降低4.751dB,CSGI降低7.005dB;Stripes的GI重构PSNR最多降低1.126dB,DGI降低2.913dB,CSGI降低6.43dB。实验结果表明,三种算法在抗双臂误差能力方面,GI表现最好,DGI其次,CSGI最弱。

关键词：关联成像双臂误差图像重构峰值信噪比

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组织工程人角膜基质体外重建的研究进展

山东大学学报（医学版） 2011年第8期49卷 62-66,89页

作者：赵文卓樊廷俊胡修忠牛莹中国海洋大学角膜组织工程重点实验室山东青岛266003

从种子细胞和载体支架两个方面的最新研究成果,对组织工程人角膜基质的体外重建及其研究中存在的问题与解决途径进行综述。

关键词：人角膜基质组织工程种子细胞载体支架重建

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FKBP38可调控多巴胺能神经元的凋亡

中国药理学通报 2023年第1期39卷 90-96页

作者：刘静谢彩婷封文斌赵文卓李芳红吴晓丽赵子建广东工业大学生物医药学院广东广州510006

目的研究FKBP38在鱼藤酮诱导的帕金森病(Parkinson’s disease PD)细胞模型中抑制凋亡的作用。方法体内实验:构建MPTP所致的PD体内模型,检测PD小鼠脑中α-synuclein、TH和FKBP38的表达。体外实验:使用鱼藤酮刺激多巴胺能神经元MN9D细胞... 详细信息

目的研究FKBP38在鱼藤酮诱导的帕金森病(Parkinson’s disease PD)细胞模型中抑制凋亡的作用。方法体内实验:构建MPTP所致的PD体内模型,检测PD小鼠脑中α-synuclein、TH和FKBP38的表达。体外实验:使用鱼藤酮刺激多巴胺能神经元MN9D细胞构建PD体外模型;采用Western blot检测PD体外模型中α-synuclein、TH、Tom20和FKBP38的表达水平;将FKBP38慢病毒转入MN9D细胞构建稳定过表达及敲减FKBP38的细胞株;采用CCK-8法检测过表达及敲减FKBP38的细胞在受到鱼藤酮刺激后的细胞活力;通过Western blot检测PD细胞模型中抗凋亡蛋白Bcl-2和凋亡蛋白Bax的表达水平。结果在PD体内外模型中,FKBP38蛋白表达水平均明显地下调(P<0.01)。而敲减FKBP38后加剧了鱼藤酮造成的多巴胺能神经元细胞活力下降(P<0.05),而过表达FKBP38却可明显地改善鱼藤酮造成的多巴胺能神经元细胞活力下降(P<0.05),并且,Western blot结果表明,过表达FKBP38可明显地上调PD多巴胺能神经元中抗凋亡蛋白Bcl-2的表达水平及升高Bcl-2/Bax的比值(P<0.05)。结论在PD细胞模型中,调控FKBP38可改善多巴胺能神经元凋亡。

关键词：帕金森病鱼藤酮 MN9D细胞细胞活力凋亡 FKBP38

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Activation of adult endogenous neurogenesis by a hyaluronic acid collagen gel containing basic fibroblast growth factor promotes remodeling and functional recovery of the injured cerebral cortex

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Neural Regeneration Research 2025年第10期20卷 2923-2937页

作者： Yan Li Peng Hao Hongmei Duan Fei Hao wen zhao Yudan Gao zhaoyang Yang Kwok-Fai So Xiaoguang Li Department of Neurobiology School of Basic Medical SciencesCapital Medical UniversityBeijingChina China Rehabilitation Science Institute China Rehabilitation Research CenterBeijing Key Laboratory of Neural Injury and RehabilitationBeijingChina Center of Neural Injury and Repair Beijing Institute for Brain DisordersBeijingChina Beijing Key Laboratory for Biomaterials and Neural Regeneration School of Engineering MedicineBeihang UniversityBeijingChina Guangdong-HongKong-Macao Institute of CNS Regeneration Ministry of Education CNS Regeneration Collaborative Joint LaboratoryJinan UniversityGuangzhouGuangdong ProvinceChina Bioland Laboratory(Guangzhou Regenerative Medicine and Health Guangdong Laboratory) GuangzhouGuangdong ProvinceChina Department of Ophthalmology and State Key Laboratory of Brain and Cognitive Sciences The University of Hong KongHong Kong Special Administration RegionChina Center for Brain Science and Brain-Inspired Intelligence Guangdong-HongKong-Macao Greater Bay AreaGuangzhouGuangdong ProvinceChina Co-innovation Center of Neuroregeneration Nantong UniversityNantongJiangsu ProvinceChina Department of Biomedical Engineering School of Biological Science and Medical EngineeringBeihang UniversityBeijingChina

The presence of endogenous neural stem/progenitor cells in the adult mammalian brain suggests that the central nervous system can be repaired and regenerated after ***,whether it is possible to stimulate neurogenesis and reconstruct cortical layers II to VI in non-neurogenic regions,such as the cortex,remains *** this study,we implanted a hyaluronic acid collagen gel loaded with basic fibroblast growth factor into the motor cortex immediately following traumatic *** findings reveal that this gel effectively stimulated the proliferation and migration of endogenous neural stem/progenitor cells,as well as their differentiation into mature and functionally integrated ***,these new neurons reconstructed the architecture of cortical layers II to VI,integrated into the existing neural circuitry,and ultimately led to improved brain *** findings offer novel insight into potential clinical treatments for traumatic cerebral cortex injuries.

关键词： adult endogenous neurogenesis basic fibroblast growth factor-hyaluronic acid collagen gel cortical remodeling functional recovery migration motor cortex injury neural circuits neural stem cells newborn neurons proliferation

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批量运输与及时配送的对抗

吉林化工学院学报 2014年第11期31卷 82-84,89页

作者：李岩赵文卓吉林化工学院理学院吉林吉林132022 吉林化工学院工会吉林吉林132022

以工厂实际问题为背景,生产商对购买者规定了一个最小的购买规格,而当地的零售商提供购买者及时配送的承诺,但是需要较高的成本.本文应用动态规划的方法帮助购买者选择提供者使总成本达到最小.

关键词：整批运送多项式算法及时配送

Differential distribution of PINK1 and Parkin in the primate brain implies distinct roles

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Neural Regeneration Research 2025年第4期20卷 1124-1134页

作者： Yanting Liu Wei Huang Jiayi wen Xin Xiong Ting Xu Qi Wang Xiusheng Chen Xianxian zhao Shihua Li Xiaojiang Li Weili Yang Guangdong Key Laboratory of Non-human Primate Research Key Laboratory of CNS Regeneration(Ministry of Education)Guangdong-Hongkong-Macao CNS Regeneration Institute of Jinan UniversityJinan UniversityGuangzhouGuangdong ProvinceChina

The vast majority of in vitro studies have demonstrated that PINK1 phosphorylates Parkin to work together in mitophagy to protect against neuronal ***,it remains largely unclear how PINK1 and Parkin are expressed in mammalian *** has been difficult to address because of the intrinsically low levels of PINK1 and undetectable levels of phosphorylated Parkin in small *** this issue is critical for elucidating the in vivo roles of PINK1 and ***,we showed that the PINK1 kinase is selectively expressed as a truncated form(PINK1–55)in the primate *** the present study,we used multiple antibodies,including our recently developed monoclonal anti-PINK1,to validate the selective expression of PINK1 in the primate *** found that PINK1 was stably expressed in the monkey brain at postnatal and adulthood stages,which is consistent with the findings that depleting PINK1 can cause neuronal loss in developing and adult monkey ***1 was enriched in the membrane-bound fractionations,whereas Parkin was soluble with a distinguishable *** double staining experiments showed that PINK1 and Parkin did not colocalize under physiological conditions in cultured monkey astrocytes,though they did colocalize on mitochondria when the cells were exposed to mitochondrial *** findings suggest that PINK1 and Parkin may have distinct roles beyond their well-known function in mitophagy during mitochondrial damage.

关键词： neurodegeneration Parkin Parkinson’s disease PINK1 subcellular distribution