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Mechanical behavior of rock under uniaxial tension:Insights from energy storage and dissipation

Journal of Rock Mechanics and Geotechnical Engineering 2024年第7期16卷 2466-2481页

作者： Guanshuang Tan Chunde Ma Junjie zhang Wenyuan Yang guiyin zhang Zihao Kang School of Resources and Safety Engineering Central South UniversityChangsha410083China

Many rock engineering projects show that the growth of tensile cracks is often an important cause of engineering disasters,and the mechanical behavior of rocks is essentially the transmission,storage,dissipation and release of *** investigate the tensile behavior of rock from the perspective of energy,uniaxial tension tests(UTTs)and uniaxial compression tests(UCTs)were carried out on three typical rocks(granite,sandstone and marble).Different unloading points were set before the peak stress to separate elastic energy and dissipated *** input energy density ut,elastic energy density ue,and dissipated energy density ud at each unloading point were calculated by integrating stress-strain *** results show that there is a strong linear relationship between the three energy parameters and the square of the unloading stress in UCT,but this linear relationship is weaker in *** ue and ud increase linearly with the increase in ut in UCT and *** on the phenomenon that ue and ud increase linearly with ut,the applicability of W_(et)^(p) index in UTT was proved and the relative energy storage capacity and absolute energy distribution characteristics of three rocks in UCT and UTT were *** tensile behavior of marble and sandstone in UTT can be divided into two stages vaguely according to the energy distribution,but granite is not the *** addition,based on dissipated energy,the damage evolution of three types of rocks in UCT and UTT was *** study provides some new insights for understanding the tensile behavior of rock.

关键词： Uniaxial tension Energy density Mechanical behavior Energy storage coefficient Energy dissipation coefficient

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通胀不确定环境下政府最优税收和债务问题研究

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计量经济学报 2024年第4期4卷 1064-1090页

作者：费为银张桂银费晨安徽工程大学数理与金融学院芜湖241000 上海理工大学管理学院上海200093

随着经济发展,政府税收和债务的问题也成为了人们关注的焦点之一.尤其是在经济下行时期,如何通过合理调控税收水平和债务水平来实现经济的稳定发展,也成为了政府考虑的问题之一.考虑到现实生活会面临通货膨胀的冲击,本文将构建一个在通... 详细信息

随着经济发展,政府税收和债务的问题也成为了人们关注的焦点之一.尤其是在经济下行时期,如何通过合理调控税收水平和债务水平来实现经济的稳定发展,也成为了政府考虑的问题之一.考虑到现实生活会面临通货膨胀的冲击,本文将构建一个在通货膨胀背景下政府最优税收和债务模型,试图分析通胀对我国最优税收和债务的影响.首先利用随机分析理论推导通胀不确定环境下政府实际债务价值的演化动力学方程.接着,利用动态规划原理推导出通胀不确定环境下最优实际家庭价值的哈密尔顿-雅可比-贝尔曼(HJB)方程.最后,对政府最优税收和债务进行数值模拟,分析通胀对政府最优税收和债务的影响,以及对达到债务容量的时间影响,并预测我国到达债务容量的时间.研究结果表明,在最优税收和债务下,较高的预期通胀率和较低通胀波动率都会降低税率和债务的边际成本,并会缩短到达债务容量的时间.

关键词：通货膨胀最优税收和债务金融市场动态规划债务容量

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Mining cotton fiber strength candidate genes based on transcriptome mapping

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Chinese Science Bulletin 2009年第24期54卷 4651-4657页

作者： LIU HengWei WANG XingFen PAN YuXin SHI RuiFeng zhang guiyin MA ZhiYing Key Laboratory of Crop Germplasm Resources of Hebei Province Agricultural University of Hebei Baoding 071001 China College of Life Science Yangtze University Jingzhou 434025 China

Cotton fiber strength is mainly determined during the secondary cell wall (SCW) thickening stage. In 24―25 days post anthesis (DPA) of SCW thickening stage, cDNA-amplified fragment length polymorphism (AFLP) was carried out to construct fiber transcriptome groups. Based on these groups, cotton fiber strength candidate genes were detected by composite interval mapping (CIM) through quantitative trait locus (QTL) scanning. The mapping population was the interspecific backcross BC1 of Gossypium hirsutum × G. barbadense. One hundred and fifteen BC1 plants were used for group construction with 102 qualified absence/presence polymorphic transcript-derived fragments (TDFs) from G. barbadense, and 78 TDFs were assigned into eight transcriptome groups that gave a total length of 462.63 centimorgans (cM). Two significant QTLs, FS1 and FS2, were detected and explained 16.08% and 15.87% of fiber strength variance, respectively. Of the six TDFs co-segregating with FS1 and FS2, except one encoding an unknown protein, five targeted putative phosphatidylinositol kinase, trehalose-6 phosphate synthase, MADS transcription factor, cellulose synthase-like protein and phenylalanine ammonia lyase, respectively. These functional genes were involved in plant cell wall morphogenesis or cellulose synthesis metabolism processes, and were considered as the candidate genes controlling cotton fiber strength.

关键词：纤维比强度基因转录扩增片段长度多态性棉花映射候选人数量性状位点复合区间作图法

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陆地棉纤维强度KASP-SNP标记的开发及效应评价

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中国农业科技导报 2024年第2期26卷 46-55页

作者：李丽花孙正文柯会锋谷淇深吴立强张艳张桂寅王省芬河北农业大学农学院华北作物改良与调控国家重点实验室河北省作物种质资源重点实验室河北保定071000

纤维强度(fiber strength,FS)是判断棉花纤维品质优劣的重要指标之一,开发可用于目标性状选择的分子标记将会大大提高选择准确性并加快育种进程。设计KASP引物,对国内外的376份品种(系)进行基因型鉴定,筛选多态性标记并验证其对高强纤... 详细信息

纤维强度(fiber strength,FS)是判断棉花纤维品质优劣的重要指标之一,开发可用于目标性状选择的分子标记将会大大提高选择准确性并加快育种进程。设计KASP引物,对国内外的376份品种(系)进行基因型鉴定,筛选多态性标记并验证其对高强纤维材料选择的有效性。3个SNP位点在材料中均具有多态性,标记FS-15对高强纤维材料的选择率为63.2%,FS-16和FS-29分别为60.0%和56.1%。对单倍型组合(Hap1、Hap2、Hap3和Hap4)的有效性评价表明,携带Hap3(TTA)的材料纤维强度显著高于其他组合,对高强纤维材料选择率达72.7%。此外,Hap3对纤维长度、铃重、籽指和衣指无不利影响。以上结果表明,开发的KASP标记及Hap3可用于高纤维强度材料的辅助选择,同时未对纤维长度、铃重、籽指和衣指等性状产生不利影响。

关键词：棉花纤维强度 KASP-SNP标记单倍型组合效应评价

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cDNA-AFLP profiling for the fiber development stage of secondary cell wall synthesis and transcriptome mapping in cotton

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Chinese Science Bulletin 2007年第17期52卷 2358-2364页

作者： PAN YuXin MA Jun zhang guiyin HAN GaiYing WANG XingFent MA ZhiYingt Key Laboratory of Crop Germplasm Resources of Hebei Province Agricultural University of Hebei Baoding 071001 China

Cotton fiber strength is mainly determined during the secondary cell wall deposition stage when cel- lulose is synthesized. We obtained cDNA of 20―25 d post anthesis (DPA) fiber from 109 F2 progeny and developed a cotton fiber transcriptome profiling via cDNA-AFLP technology using 37 different primer combinations. The F2 population originated from an interspecific cross between Gossypium hirsutum and Gossypium barbadense. One hundred and thirty-eight absence/presence polymorphic transcript- derived fragments (TDFs), with sizes ranging from 100 bp to 722 bp, were screened. Of these, 75 (53.62%) were polymorphic between the parents of the F2 population. Sequencing the 75 transcripts revealed that 37 of them had been reported to be cotton fiber ESTs. Nine of 75 transcript sequences were homologous to 7 cloned cotton fiber genes, encoding cysteine proteinase, vacuolar H+-pyro- phosphatase, vacuolar H+-ATPase, catalytic subunit, arabinogalactan protein, putative receptor protein kinase PERK1, GIA/RGA-like gibberellin response modulator and cellulose synthase. Some other transcripts may represent new gene fragments in cotton fiber development. Surprisingly, 46 of the 75 transcripts were mapped to a single linkage group. The transcriptome groups and the sequenced TDFs could serve as important resources in the functional genomic research of cotton fiber development.

关键词：棉花 cDNA-AFLP 基因转录纤维生长细胞壁

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汽车下控制臂性能优化及轻量化设计

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汽车实用技术 2024年第17期49卷 50-54页

作者：陈志洋胡礼张桂银刘辉张健华陈正康李颖四川建安工业有限责任公司四川成都610100

汽车下控制臂需要具备一定的强度和刚度以抵抗挤压、冲击变形,还需要具备较高的固有频率,以避免低频共振,产生噪音。文章以某在研汽车下控制臂为轻量化设计对象,通过仿真分析识别出屈曲力不足的设计风险,综合运用形状、拓扑优化方法重... 详细信息

汽车下控制臂需要具备一定的强度和刚度以抵抗挤压、冲击变形,还需要具备较高的固有频率,以避免低频共振,产生噪音。文章以某在研汽车下控制臂为轻量化设计对象,通过仿真分析识别出屈曲力不足的设计风险,综合运用形状、拓扑优化方法重新设计了控制臂,并对新设计进行性能仿真。结果表明,新控制臂消除了屈曲力不足的设计风险,新设计较原设计减重6.6%。文章采用线性优化方法解决高度非线性的屈曲力优化问题,采用拓扑优化识别出载荷的传递路径,为汽车控制臂的屈曲力优化及轻量化设计提供新思路。

关键词：下控制臂形状优化设计轻量化设计屈曲性能

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Evaluation of the genetic diversity of fibre quality traits in upland cotton(Gossypium hirsutum L.) inferred from phenotypic variations

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Journal of Cotton Research 2019年第4期2卷 183-190页

作者： SUN Zhengwen WANG Xingfen LIU Zhengwen GU Qishen zhang Yan LI Zhikun KE Huifeng YANG Jun WU Jinhua WU Liqiang zhang guiyin MA Zhiying North China Key Laboratory for Crop Germplasm Resources of Ministry of Education/Key Laboratory for Crop Germplasm Resources of Hebei Province Hebei Agricultural University

Background:Evaluating phenotypic traits is very important for the selection of elite lines in Gossypium hirsutum *** breeders are interested in using diverse genotypes in hybridization that can segregate for traits of interested with the possibility of selection and genetic *** on phenotypic and molecular diversity helps the breeders for parental ***:In this study,719 global collections of *** *** evaluated for five fibre-related traits during two consecutive years in eight different environments.A series of phenotypic data for fibre quality traits were obtained and the elite accessions were further screened using principal component analysis and phylogenetic tree construction based on single nucleotide polymorphism ***:We found that fibre quality traits showed a wide range of variation among the *** accessions over2 *** general,accessions from outside China tended to have higher fibre length （FL） and fibre strength （FS）than did Chinese *** different regional accessions in China,North/Northwest accessions tended to have the highest FL,FS and best fibre *** assessing five fibre quality traits over 2 years with genotypic data,31 elite germplasms reaching double-thirty quality values (FL≥30 mm and FS≥30 cN·tex-1) were ***:This study provided a detailed phenotypic diversity description of a population representing a wide range of upland cotton *** findings provide useful information about possible elite fibre quality parents for cotton breeding programs.

关键词： Gossypium hirsutum L. Fibre quality Morphological traits Genetic diversity Double-thirty

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新辅助内分泌治疗对于高危前列腺癌根治术"三连胜"效果的影响评价

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国际泌尿系统杂志 2024年第5期44卷 805-809页

作者：刘骏锋周术奎刘磊唐多才张桂银李曾杨盛柯陈勇吉廖洪成都医学院临床医学院成都610500 四川省肿瘤临床医学研究中心(四川省肿瘤医院研究所四川省癌症防治中心电子科技大学附属肿瘤医院)泌尿外科成都610041

目的探讨新辅助内分泌治疗(NHT)对高危前列腺癌根治术(RP)后"三连胜"效果的影响。方法回顾性分析2015年5月至2022年3月在四川省肿瘤医院行RP的62例高危前列腺癌(PCa)患者的临床资料,将其中31例RP术前行NHT患者设为新辅助组,另外31例行R... 详细信息

目的探讨新辅助内分泌治疗(NHT)对高危前列腺癌根治术(RP)后"三连胜"效果的影响。方法回顾性分析2015年5月至2022年3月在四川省肿瘤医院行RP的62例高危前列腺癌(PCa)患者的临床资料,将其中31例RP术前行NHT患者设为新辅助组,另外31例行RP患者设为对照组。比较两组的围手术期情况、肿瘤控制情况、排尿功能恢复情况、术后性功能等。结果新辅助组的术后切缘阳性率、病理降期率明显优于对照组,差异均有统计学意义(均P0.05)。结论新辅助内分泌治疗可显著降低手术切缘阳性、实现病理降期,使部分患者的病理完全缓解,在肿瘤控制方面有明显获益,是高危PCa患者可供选择的治疗方式。

关键词：前列腺肿瘤新辅助治疗前列腺癌根治术

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激光诱导化学气相淀积初始过程的研究

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激光杂志 2000年第6期21卷 55-57页

作者：张贵银华北电力大学基础科学系河北保定071003

分析了激光诱导化学气相淀积过程中激光对气体的激发机理 ,采用半经典近似的方法 ,推导出气体吸收系数的数学表达式 ,以此为基础讨论了实验参量———激光强度、频率、气体压强对气体吸收过程的影响。

关键词：化学气相淀积激光诱导薄膜制备工艺

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Four-wave mixing and its relaxation effect in liquid crystals

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激光 1980年第Z1期 38-39页

作者： Re Peixuan,Chu guiyin,zhang Zhiguo,Fu PanmingInstitute of Physics,Academia Sinica,Beijing

We have observed degenerate and nondegenerate four-wave mixing in liquid crystalsMBBA and p-methoxybutyl oxyazobenzene in their isotropic phases（at temperatureshigher than 42℃and 70℃ respectively）.The expeinental setups are shown in *** *** 4 is the mixed *** mixing efficiency（intensityratio of beam 4 to beam 3）was about 2×10-3and 1×*** parametefor the SHG of YAG laser are as follows:wave length,5320（?）;pulse width,14ns;outputenergy,5-6mJ;cross-section of the beams,about 1 *** for the flash-lamp-pum-ped dye laser are:wavelength 5800（?）;pulse width,0.5μs;output energy,*** of the YAG laser and the dye laser output could be synchronized or adjusted tohave a relative *** angle between beams 1 and 3 was about 0.08 *** of the sample’s temperature was less than 0.01℃.

关键词： wave Four-wave mixing and its relaxation effect in liquid crystals SHG

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