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基于期货风险溢价效应的套期保值行为模式

管理科学学报 2012年第11期15卷 23-30页

作者：宋军缪夏美复旦大学经济学院上海200433

首先论证便利收益调整后的风险溢价是套期保值净需求的代理变量,然后构建基于期货风险溢价效应的模型来研究现货价格波动率、偏度和期限结构对套保行为的影响.结果显示随着现货波动率和到期期限增加,套期保值净需求增加;但现货价格偏度... 详细信息

首先论证便利收益调整后的风险溢价是套期保值净需求的代理变量,然后构建基于期货风险溢价效应的模型来研究现货价格波动率、偏度和期限结构对套保行为的影响.结果显示随着现货波动率和到期期限增加,套期保值净需求增加;但现货价格偏度对套保影响的结果不一致,表明套保者会在一定条件下选择性套期保值;不同品种间套期保值行为存在明显差异.本文结论有助于理解套期保值的真实行为模式.

关键词：风险溢价效应套期保值到期期限

Compensation temperatures and hysteresis behaviors of a graphene-like trilayer

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Communications in Theoretical Physics 2024年第5期76卷 166-179页

作者： Ying An Ji Liang Wei Wang mei-mei Du Feng-ge Zhang School of Science Shenyang University of TechnologyShenyang 110870China School of Electrical Engineering Shenyang University of TechnologyShenyang 110870China

This work focuses on the ground-state phase diagram,the compensation temperatures and the critical behaviors of a ferrimagnetic graphene-like trilayer induced by crystal fields and exchange *** simulation results show that a negative decrease in crystal field or an increase in exchange coupling can increase the critical *** importantly,an M curve with double compensation temperatures can be observed,which is not predicted by the Neel *** remarkable compensation phenomenon has potential application value in the field of magnetic recording.

关键词： graphene-like trilayer mixed-spin Ising model magnetization double compensation temperatures triple-loop hysteresis monte Carlo

Biological Characteristics of Exorista civilis,A Dominant Parasitoid of Loxostege sticticalis L.

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Animal Husbandry and Feed Science 2013年第5期5卷 219-223,235页

作者： XIANG Hong-yan LIU Ai-ping GAO Shu-jing XU Lin-bo LIU Chang-zhong miao Li-mei KANG Ai-guo WANG Jian-mei College of Grassland Science Gansu Agricultural University Grassland Research Institute Chinese Academy of Agricultural Sciences Inner Mongolia aquatic technique extend station Plant Protection Station of Kangbao County

Exodsta civilis Rond. （ Diptera： Tachinidae） is an important parasitoid of Loxostege sticticalis L. （ Lepidoptera： Pyrelidae） and other lepidopterous pests. The biological characteristics of E. civilis were observed in the laboratory with L. sticticalis as host. The adults emerged mainly during the daytime from 08：00 am to 10：00 am and 14：00 pm to 16：00 pm, and males emerged usually earlier than females, with the sex ratio of 1.26：1 （ 2/♂ ）. The average fecundity of female （number of eggs laid by one female） was 159.8 eggs, and the spawning duration lasted 16.6 d on average; the first spawning peak appeared on the fourth day after spawning. The longevity of adults was the longest at constant temperature of （23 ± 1 ） ℃. Supplement of sugary substances could significantly prolong the longevity of adults, especially feeding 20% hydromel could extend the longevity to 44 d. The emergence rate of E. civilis significantly decreased with an increase in storage time of L. sticticalis cocoon, but there was no further significant decrease after 110 d.

关键词： Exodsta civilis Loxostege sticticalis Biology Longevity Emergency ratio

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低空急流与山西大暴雨的统计关系及流型配置

高原气象 2010年第4期29卷 939-946页

作者：苗爱梅武捷赵海英李苗山西省气象台山西太原030006 山西省气象信息中心山西太原030006 山西省气象科技服务中心山西太原030002

利用山西省气象信息中心归档的109个测站1957—2008年的暴雨观测资料、高低空常规气象观测资料及山西省水文站的部分暴雨监测资料,研究了低空急流与山西省区域性暴雨、大暴雨以及特大暴雨的特征。结果表明:1957—2008年的192个暴雨日(... 详细信息

利用山西省气象信息中心归档的109个测站1957—2008年的暴雨观测资料、高低空常规气象观测资料及山西省水文站的部分暴雨监测资料,研究了低空急流与山西省区域性暴雨、大暴雨以及特大暴雨的特征。结果表明:1957—2008年的192个暴雨日(区域性暴雨)、118个大暴雨日、10个特大暴雨日,有偏南风(或偏东风)最大风轴相伴出现的分别有165,110和10次,分别占其总次数的86%,93.2%和100%,表明其预示性极强;当山西大暴雨中有台风介入时,台风一般沿25°N以南西行,在其北侧与副热带高压之间形成强的东到东南风带,经鄂西北、豫西一带受西风槽或高原低值系统前部的偏南气流阻挡折向西北使副热带高压西北侧的西南气流加强,形成中尺度低空西南急流;当无台风介入时,热带辐合区一般在17°N以南,高原低值系统活跃,副热带高压与高原低值系统之间形成的天气尺度西南低空急流常常伸向黄河中游,大暴雨的落区主要在太原以南地区;根据高、低空急流的位置以及有、无台风介入,归纳出的6种大暴雨预报模型基本涵盖了山西大暴雨的落区与中、低空急流的关系,但中、低空急流的类别、位置不同以及经、纬向副热带高压、500hPa急流、西风槽、高原槽和台风等的不同配置,可使大暴雨的落区和强度不同。

关键词：山西大暴雨高空急流低空急流预报模型

Type I interferon pathway in pediatric systemic lupus erythematosus

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World Journal of Pediatrics 2024年第7期20卷 653-668页

作者： Yu Zhou Hong‑mei Song Department of Pediatrics Peking Union Medical College HospitalChinese Academy of Medical SciencesBeijingChina State Key Laboratory of Complex Severe and Rare Diseases Peking Union Medical College HospitalBeijingChina

Background The role of type I interferon(IFN-I)signaling in systemic lupus erythematosus(SLE)has been well ***,unanswered questions remain regarding the applicability of these findings to pediatric-onset *** aim of this review is to provide an overview of the novel discoveries on IFN-I signaling in pediatric-onset *** sources A literature search was conducted in the PubMed database using the following keywords:“pediatric systemic lupus erythematosus”and“type I interferon”.Results IFN-I signaling is increased in pediatric SLE,largely due to the presence of plasmacytoid dendritic cells and pathways such as cyclic GMP-AMP synthase–stimulator of interferon genes–TANK-binding kinase 1 and Toll-like receptor(TLR)4/*** extracellular traps and oxidative DNA damage further stimulate IFN-I *** variants in IFN-I-related genes,such as IFN-regulatory factor 5 and tyrosine kinase 2,are linked to SLE susceptibility in pediatric *** addition,type I interferonopathies,characterized by sustained IFN-I activation,can mimic SLE symptoms and are thus important to *** on interferonopathies also contribute to exploring the pathogenesis of *** IFN-I activation is crucial for SLE diagnosis and *** IFNstimulated gene expression and serum IFN-α2 levels are common *** cytometry markers such as CD169 and galectin-9 are promising ***-IFN therapies,such as sifalimumab and anifrolumab,show promise in adult patients with SLE,but their efficacy in pediatric patients requires further *** kinase inhibitors are another treatment option for severe pediatric SLE *** This review presents an overview of the IFN-I pathway in pediatric *** the intricate relationship between IFN-I and pediatric SLE may help to identify potential diagnostic markers and targeted therapies,paving the way for improved patient care and outcomes.

关键词： Interferonopathies Pediatric systemic lupus erythematosus Type I interferon

Characterizations of semihoops based on derivations

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Applied Mathematics(A Journal of Chinese Universities) 2024年第2期39卷 291-310页

作者： WANG mei ZHANG Xiao-hong School of Electrical and Control Engineering Shaanxi University of Science and TechnologyXi'an 710021China School of Arts and Sciences Shaanxi University of Science and TechnologyXi'an 710021China School of Mathematics and Statistics Weinan Normal UniversityWeinan 714099China

In this paper,we discuss the related properties of some particular derivations in semihoops and give some characterizations of ***,we prove that every Heyting algebra is isomorphic to the algebra of all multiplicative derivations and show that every Boolean algebra is isomorphic to the algebra of all implicative ***,we show that the sets of multiplicative and implicative derivations on bounded regular idempotent semihoops are in oneto-one correspondence.

关键词： (prelinear)semihoop derivation Heyting algebra Galois connection

Process in laser drilling of deep microholes without taper on metal materials

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Science China(Technological Sciences) 2024年第1期67卷 37-59页

作者： FAN RunZe mei XueSong CUI JianLei State Key Laboratory for Manufacturing Systems Engineering Xi’an Jiaotong UniversityXi’an 710054China

Deep microhole machining is currently a prominent research area within the aerospace field,encompassing blade film cooling and fuel injection control ***,taper defects in metal materials may lead to performance degradation or even structural damage over a component’s *** and helical drilling,facilitated by ultrashort pulse lasers,have proven more suitable for achieving high-precision,deep holes in metal ***,excessive repetition rates can also result in severe thermal *** methods are commonly employed for controlling taper,including parameter optimization,assistance,and secondary *** laser beam drilling is widely utilized and has been integrated into relevant machining systems for commercial *** deep microholes include film cooling holes and injection *** drilling is a potential machining method for new materials in the aerospace *** laser drilling processing has been studied,numerous related scientific challenges and technical difficulties must be addressed before practical implementation.

关键词： aerospace laser drilling deep microhole taper control

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下户出钱:宋代南方水利募捐主体的再认识

中国农史 2022年第3期41卷 77-86页

作者：祁琛云苗书梅河南大学历史文化学院河南开封475001

两宋时期,基层农田水利建设资金以民众自筹为重要来源,而从事农业生产的乡村下层民众是水利兴修经费的主要承担者。水利设施周边的食利民户及其他名不见经传的基层民众,通过参与地方政府主导的官民共筹、民众分摊建设经费、向官府或私... 详细信息

两宋时期,基层农田水利建设资金以民众自筹为重要来源,而从事农业生产的乡村下层民众是水利兴修经费的主要承担者。水利设施周边的食利民户及其他名不见经传的基层民众,通过参与地方政府主导的官民共筹、民众分摊建设经费、向官府或私人借贷及自发集资等方式,被动或主动地参与基层农田水利设施建设经费的筹措。正是在广大下层普通民众的大力支持下,尽管宋代地方政府财政普遍紧张,但农田水利事业却始终保持着持续向好的发展势头。

关键词：宋代农田水利众筹南方民众水利资金

Metadherin promotes stem cell phenotypes and correlated with immune infiltration in hepatocellular carcinoma

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World Journal of Gastroenterology 2024年第8期30卷 901-918页

作者： Yi-Ying Wang mei-mei Shen Jian Gao Department of Gastroenterology The Second Affiliated Hospital of Chongqing Medical UniversityChongqing 400010China Department of Gastroenterology and Hepatology The Second Affiliated Hospital of Chongqing Medical UniversityChongqing 400010China

BACKGROUND Metadherin(MTDH)is a key oncogene in most cancer types,including hepato-cellular carcinoma(HCC).Notably,MTDH does not affect the stemness pheno-type or immune infiltration of *** To explore the role of MTDH on stemness and immune infiltration in *** MTDH expression in HCC tissues was detected using TCGA and GEO *** was used to analyze the tissue *** was stably knocked down or overexpressed by lentiviral transfection in the two HCC cell *** invasion and migration abilities of HCC cells were evaluated using Matrigel invasion and wound healing ***,we obtained liver cancer stem cells from the spheroids by culturing them in a serum-free *** expression was determined by western blotting and quantitative reverse transcri-ption *** cytometry,immunofluorescence,and tumor sphere formation assays were used to characterize stem-like *** effects of MTDH inhibition on tumor growth were evaluated in *** correlation of MTDH with immune cells,immunomodulators,and chemokines was analyzed using ssGSEA and TISIDB *** HCC tissues expressed higher levels of MTDH than normal liver *** MTDH expression was associated with a poor *** cells overex-pressing MTDH exhibited stronger invasion and migration abilities,exhibited a stem cell-like phenotype,and formed spheres;however,MTDH inhibition attenuated these *** inhibition suppressed HCC progression and CD133 expression in *** was positively correlated with immature dendritic,T helper 2 cells,central memory CD8^(+)T,memory B,activated dendritic,natural killer(NK)T,NK,activated CD4^(+)T,and central memory CD4^(+)T *** was negatively correlated with activated CD8^(+)T cells,eosinophils,activated B cells,monocytes,macrophages,and mast cells.A positive correlation was observed between the MTDH level and CXCL2 expression,whereas a negative correlation was observed between the MTDH level and CX3CL1 a

关键词： Metadherin Hepatocellular carcinoma Cancer stem cells Immune infiltration