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CLAIM HEDGING IN AN INCOMPLETE MARKET

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Journal of Systems Science & Complexity 2005年第2期18卷 193-201页

作者： SUNWangui WANGChunfeng schoolofeconomics&management NorthwestUniversityXi'an710069China. schoolofmanagement TianjinUniversityTianjin300072China

In this paper, we compare the performance of the optimal attainable payoffs (of a general claim) derived by the variance-optimal approach and the indifference argument under the mean-variance preference in an incomplete market. Both payoffs are expressed by the signed variance-optimal martingale measure. Our results are applied to the claim hedging under partial information.

关键词： incomplete market variance-optimal approach indifference argument, generalclaims partial information

The MORC2 p.S87L mutation reduces proliferation of pluripotent stem cells derived from a patient with the spinal muscular atrophy-like phenotype by inhibiting proliferation-related signaling pathways

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Neural Regeneration Research 2024年第1期19卷 205-211页

作者： Sen Zeng Honglan Yang Binghao Wang Yongzhi Xie Ke Xu Lei Liu Wanqian cao Xionghao Liu Beisha Tang Mujun Liu Ruxu Zhang Department of Neurology The Third Xiangya HospitalCentral South UniversityChangshaHunan ProvinceChina Department of Neurology The First Affiliated Hospital of Zhengzhou UniversityZhengzhouHenan ProvinceChina Department of Radiology The Third Xiangya HospitalCentral South UniversityChangshaHunan ProvinceChina Health management Center The Third Xiangya HospitalCentral South UniversityChangshaHunan ProvinceChina Center for Medical Genetics&Hunan Key Laboratory of Medical Genetics School of Life SciencesCentral South UniversityChangshaHunan ProvinceChina National Clinical Research Center for Geriatric Disorders Central South UniversityChangshaHunan ProvinceChina Department of Cell Biology School of Life SciencesCentral South UniversityChangshaHunan ProvinceChina

Mutations in the microrchidia CW-type zinc finger protein 2(MORC2)gene are the causative agent of Charcot-Marie-Tooth disease type 2Z(CMT2Z),and the hotspot mutation p.S87L is associated with a more seve re spinal muscular atrophy-like clinical *** aims of this study were to determine the mechanism of the severe phenotype caused by the MORC2 p.S87L mutation and to explore potential treatment *** cells were isolated from urine samples from a spinal muscular atrophy(SMA)-like patient[MORC2 p.S87L),a CMT2Z patient[MORC2 p.Q400R),and a healthy control and induced to generate pluripotent stem cells,which were then differentiated into motor neuron precursor ***-generation RNA sequencing followed by KEGG pathway enrichment analysis revealed that differentially expressed genes involved in the PI3K/Akt and MAP K/ERK signaling pathways were enriched in the p.S87L SMA-like patient group and were significantly downregulated in induced pluripotent stem *** proliferation was observed in the induced pluripotent stem cells and motor neuron precursor cells derived from the p.S87L SMA-like patient group compared with the CMT2Z patient group and the healthy control.G0/G1 phase cell cycle arrest was observed in induced pluripotent stem cells derived from the p.S87L SMA-like ***2 p.S87Lspecific antisense oligonucleotides(p.S87L-ASO-targeting)showed significant efficacy in improving cell prolife ration and activating the PI3K/Akt and MAP K/ERK pathways in induced pluripotent stem *** r,p.S87L-ASO-ta rgeting did not rescue prolife ration of motor neuron precursor *** findings suggest that downregulation of the PI3K/Akt and MAP K/ERK signaling pathways leading to reduced cell proliferation and G0/G1 phase cell cycle arrest in induced pluripotent stem cells might be the underlying mechanism of the severe p.S87L SMA-like phenotype.p.S87L-ASO-targeting treatment can alleviate disordered cell proliferation in the early stag

关键词： antisense oligonucleotides cell cycle arrest Charcot-Marie-Tooth disease 2Z induced pluripotent stem cells MAPK/ERK PI3K/Akt proliferation spinal muscular atrophy-like

E-commerce,Pandemic Shock,and the Survival of Small and Medium Enterprises

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China & World Economy 2024年第5期32卷 113-139页

作者： Zengdong cao Qin Tu Nichola Latoya Williams Business school Beijing Normal UniversityChina Center for Innovation and Development Studies Beijing Normal UniversityChina Department of Finance and economics Sheffield Hallam UniversityUnited Kingdom

This study examines the impact of e-commerce on the survival rate of small and medium enterprises(SMEs)during the COVID-19 pandemic using a combined dataset from the Enterprise Survey for Innovation and Entrepreneurship in China for the period from 2018 to *** conducted a difference-in-differences analysis by exploiting the variation in the adoption of e-commerce across SMEs before and after the outbreak of *** results show that e-commerce had a significantly positive effect on the survival rate of SMEs during the ***,it improved the survival rate of SMEs by 3.0 to 3.4 percentage points by expanding the scale of the enterprises'markets,mitigating declines in orders,shortening the repayment periods of accounts receivable,and improving cash flow during a *** analysis reveals that the impact of e-commerce was more pronounced for SMEs with a larger share of online sales and for labor-intensive SMEs,and third-party e-commerce platforms or Web sites played a bigger role than self-built Web sites and social *** study offers novel evidence highlighting the value of digitalization for firms during the crisis.

关键词： COVID-19 pandemic difference-in-differences e-commerce survival rate

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空间折索单元的切线刚度矩阵

同济大学学报（自然科学版） 2003年第5期31卷 520-524页

作者：李明同济大学经济与管理学院上海200092

预应力空间网格结构是一种新型的结构形式 ,对该结构进行非线性分析计算时 ,需要采用空间索单元的切线刚度矩阵 .通过对于预应力索单元的分析研究 ,推导了具有初始应力的空间折索单元的单元切线刚度矩阵的计算公式 ,并且建立了可用于预... 详细信息

预应力空间网格结构是一种新型的结构形式 ,对该结构进行非线性分析计算时 ,需要采用空间索单元的切线刚度矩阵 .通过对于预应力索单元的分析研究 ,推导了具有初始应力的空间折索单元的单元切线刚度矩阵的计算公式 ,并且建立了可用于预应力空间网格结构非线性有限元分析的非线性方程组 .所推导的公式均具有良好的规律性。

关键词：空间折索单元切线刚度矩阵非线性分析

Growth of nitrate contribution to aerosol pollution during wintertime in Xi'an,northwest China:Formation mechanism and effects of NH_(3)

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Particuology 2024年第4期87卷 303-315页

作者： Hui Su Ting Zhang Suixin Liu Yao Qu Huan Li Jiamao Zhou Zhuzi Zhao Qiyuan Wang Lu Li Minxia Shen Shuoyuan Chen Steven Sai Hang Ho Junji cao State Key Laboratory of Loess and Quaternary Geology.Key Laboratory ofAerosol Chemistry and Plhysics Institute of Earth EnvironmentChinese Acadery of SciencesXi'an 710061China Xi'an Institute for Innovative Earth Environment Research Xi'an 710061China National pbservation and Research Station of Regional Ecological Environment Change and Cornprehensive management in the Guanzhong Plain Xi'an 710061China Shaanxi Key Laboratory of Atmospheric and Haze fog Pollution Prevention Institute of Earth EnvironmentChinese Academy of SciencesXi'an 710061China University of Chinese Academy of Sciences Beijing 100049China school of Chemical and Environmental Engineering Jiangsu University of TechnologyChangzhou 213001China Division of Atmospheric Sciences Desert Research InstituteReno NV89512United States Institute of Atmospheric Physics Chinese Academy of SciencesBeijing 100029China

With the strengthened controls on SO2 emissions and extensive increases in motor vehicles'exhaust,aerosol pollution shifts from sulfate-rich to nitrate-rich in recent years in Xi'an,*** further gain insights into the factors on nitrate formation and efficiently mitigate air pollution,highly time-resolved observations of water-soluble inorganic ions(WSIIs)in PM_(2.5) were measured in a suburban area of Xi'an,China during *** concentration of total WSIIs is 39.8μg m-3 on average,accounting for 50.3%of PM_(2.5) *** contrast to a slight decrease in the mass fraction of SO_(4)^(2-),NO_(3)-shows a sig-nificant increase of the PM_(2.5) contribution with the aggravation of aerosol *** suggests the importance of NO_(3)-formation to haze ***,homogeneous reactions govern the formation of NO_(3)-,while alkali metals such as calcium and sodium play an additional role in retaining NO_(3)-in PM_(2.5) during clean ***,the heterogeneous hydrolysis reaction contributed more to NO_(3)-formation during the pollution periods under high relative *** investigation reveals that temperature,relative humidity,oxidant,and ammonia emissions facilitate rapid NO_(3)-*** the random forest(RF)model,NO_(3)-concentrations were successfully simulated with measured variables for the training and testing datasets(R2>0.95).Among these variables,CO,NH_(3),and NO_(2) were found to be the main factors affecting the NO_(3)-*** with the period without vehicle re-striction,the contributions of NO_(3)-and NH4+to PM_(2.5) mass decreased by 5.3%and 3.4%in traffic re-striction periods,*** vehicle restriction leads to the decreases of precursor gases of NO_(2),SO_(2),and NH_(3) by 12.8%,5.9%,and 27.6%,*** results demonstrate collaborative emission reduction of NO_(x) and NH_(3) by vehicle restrictions,and using new energy vehicles(or electric vehicles)can effectively alleviate particul

关键词： PM_(2.5) Water-soluble inorganic ions Nitrate formation Excess ammonium Vehicle restrictions

Analysis of Syetem Reliability in Manufacturing Cell Based on Triangular Fuzzy Number

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武汉理工大学学报 2006年第S2期28卷 741-744页

作者： ZHANG Caibo HAN Botang SUN Changsen XU Chunjie (school of management and economics,Beijing Institute of Technology,Beijing 100081,China, school of management and economics Beijing Institute of TechnologyBeijing 100081China

Due to lacking of test-data and field-data in reliability research during the design stage of manufacturing cell sys- *** degree of manufacturing cell system reliability research is *** order to deal with the deficient data and the un- certainty occurred from analysis and judgment,the paper discussed a method for studying reliability of manufacturing cell system through the analysis of fuzzy fault tree,which was based on triangular fuzzy *** last,calculation case indicated that it would have great significance for ascertaining reliability index,maintenance and establishing keeping strategy towards manufac- turing cell system.

关键词： triangular fuzzy number manufacturing cell fault tree reliability

A Study on Reasons and Countermeasures of Government Incredibility in the Important Public Crisis

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A Study on Reasons and Countermeasures of Government Incredi...

The Third International Conference on Information Systems for Crisis Response and management & the Fourth International Symposium on Geo-Infprmation for Disaster management

作者： yukun cao College of management and economics Northeast Forestry University China 150040 Lei Yang College of management and economics Northeast Forestry University China 150040

＜正＞In dealing with the pubhc and resolving the crisis event,incredibihty of government’s tends to arouse social disorder and panic,further aggravating extent of the damage of the crisis and *** the theory of economics,the proposed reasons of the Chinese governmental incredibility in solving pubhc crisis mainly includes:gains of official incredibility exceeds costs;governmental organizations lacks the credibility to ensure the government cost-benefit mechanism;governmental organizations rational behavior is *** social credit system is not in perfect conditions,the government and the pubhc focused on short-term interests will form one-off *** on such reasons,countermeasures and suggestion are put forward to promote the credibility of government policies.

关键词： Public crisis government honesty reason countermeasures

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论二元经济结构的转化趋向

经济研究 2005年第9期40卷 91-102页

作者：高帆复旦大学理论经济学博士后流动站西北大学经济管理学院710069

促使二元经济结构转化是发展中国家经济发展的一个关键,然而,现有文献不能为经济结构的转化趋向提供有说服力的解释,这影响了人们对二元经济问题的认识及转化路径的选择。本文认为二元经济反差源于两部门不同的分工水平,结构转变的趋向... 详细信息

促使二元经济结构转化是发展中国家经济发展的一个关键,然而,现有文献不能为经济结构的转化趋向提供有说服力的解释,这影响了人们对二元经济问题的认识及转化路径的选择。本文认为二元经济反差源于两部门不同的分工水平,结构转变的趋向必须在分工演进的视角下才可能得到解释。基于此,本文构建了一个新兴古典经济学模型,证明了随着分工组织的演进和分工水平的提高,二元经济结构转变体现为一个工业化,以及在此基础上的服务业的兴起和城市化水平提高的过程,而促使分工演进的关键是交易效率提高,或者说交易费用降低,理论推导的命题能够得到经验数据的支持,这样就内在一致地解释了二元经济结构在产业和空间等方面的转化趋向。

关键词：二元经济转化趋向分工组织交易效率

Curcumin inhibits the growth and invasion of gastric cancer by regulating long noncoding RNA AC022424.2

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World Journal of Gastrointestinal Oncology 2024年第4期16卷 1437-1452页

作者： Bin-Sheng Wang Chen-Li Zhang Xiang Cui Qiang Li Lei Yang Zhi-Yun He Ze Yang Miao-Miao Zeng Nong cao Department of General Surgery First Hospital of Lanzhou UniversityLanzhou 730000Gansu ProvinceChina school of Basic Medical Sciences Lanzhou UniversityLanzhou 730000Gansu ProvinceChina Third Department of General Surgery First Hospital of Lanzhou UniversityLanzhou 730000Gansu ProvinceChina

BACKGROUND Gastric cancer,characterized by a multifactorial etiology and high heterogeneity,continues to confound researchers in terms of its ***,a natural anticancer agent,exhibits therapeutic promise in gastric *** effects include promoting cell apoptosis,curtailing tumor angiogenesis,and enhancing sensitivity to radiation and *** noncoding RNAs(lncRNAs)have garnered significant attention as biomarkers for early screening,diagnosis,treatment,and drug response because of their remarkable specificity and *** investigations have revealed an association between aberrant lncRNA expression and early diagnosis,clinical staging,metastasis,drug sensitivity,and prognosis in gastric cancer.A profound understanding of the intricate mechanisms through which lncRNAs influence gastric cancer develop-ment can provide novel insights for precision treatment and tailored management of patients with gastric *** study aimed to unravel the potential of curcumin in suppressing the malignant behavior of gastric cancer cells by upregu-lating specific lncRNAs and modulating gastric cancer onset and *** To identify lncRNAs associated with curcumin treatment and investigate the role of lncRNA AC022424.2 in the effects of curcumin on gastric cancer cell apoptosis,proliferation,and ***,these findings were validated in clinical *** The study employed CCK-8 assays to assess the impact of curcumin on gastric cancer cell proliferation,flow cytometry to investigate its effects on apoptosis,and scratch and Transwell assays to evaluate its influence on the migration and invasion of BGC-823 and MGC-803 *** blotting was used to gauge changes in the protein expression levels of CDK6,CDK4,Bax,Bcl-2,caspase-3,P65,and the PI3K/Akt/mTOR pathway in gastric cancer cell lines after curcumin *** expression of lncRNAs before and after curcumin treatment was assessed using lncRNA seq

关键词： Gastric cancer Curcumin Long noncoding RNA AC022424.2 Apoptosis Akt/PI3K pathway Lymph metastasis