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不同结构体系建筑的抗震设计及其自动优化方法研究

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建筑技术开发 2024年第5期51卷 31-33页

作者：张贤龙贵州大学勘察设计研究院有限责任公司贵阳550000

通过研究混凝土结构、钢结构和钢混组合结构体系在抗震设计方面的特点及优势,详细阐述了针对不同结构体系的抗震设计技术策略得知,可采用高强度材料、塑性设计、隔震技术以及阻尼器等。通过使用遗传算法和粒子群算法对钢混组合结构进行... 详细信息

通过研究混凝土结构、钢结构和钢混组合结构体系在抗震设计方面的特点及优势,详细阐述了针对不同结构体系的抗震设计技术策略得知,可采用高强度材料、塑性设计、隔震技术以及阻尼器等。通过使用遗传算法和粒子群算法对钢混组合结构进行了抗震性能自动优化设计,结果表明结构优化算法能够高效自动地搜索最优设计方案,不同结构体系均可采用特定技术与策略提升抗震性能,结构优化算法在抗震设计优化中发挥着重要作用,抗震设计与优化技术的发展将大幅提升建筑结构的抗灾能力,以保障人民的生命财产安全。

关键词：结构体系抗震设计结构优化

陆地棉重组自交系再生能力和遗传转化效率筛选

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作物学报 2024年第5期50卷 1172-1180页

作者：乐愉王涛张献龙林忠旭华中农业大学植物科学技术学院/作物遗传改良全国重点实验室湖北武汉430070

转基因工程育种是棉花种质创新的有效手段,为了拓展陆地棉可再生基因型,丰富棉花转基因受体,本研究以湖北省高产阔叶棉品种‘鄂棉22’(E22)为母本、高再生能力的鸡脚叶品种‘豫早1号’(YZ1)为父本,通过单籽传法构建了F9重组自交系群体(Y... 详细信息

转基因工程育种是棉花种质创新的有效手段,为了拓展陆地棉可再生基因型,丰富棉花转基因受体,本研究以湖北省高产阔叶棉品种‘鄂棉22’(E22)为母本、高再生能力的鸡脚叶品种‘豫早1号’(YZ1)为父本,通过单籽传法构建了F9重组自交系群体(YE);利用棉花中比较成熟的IBA+KT(IK)和2,4-D+KT(DK)2种不同激素组合的培养体系,分别对重组自交系群体的164个家系的愈伤组织诱导率(CIF)、愈伤组织继代繁殖力(CSC)、愈伤组织的出胚率(CRE)以及愈伤组织出胚时间(CET)进行比较,共获得12个可再生的阔叶棉家系;利用目前成熟的棉花遗传转化体系对可再生阔叶棉家系进行遗传转化效率分析,同时对其进行田间农艺性状考察,最终获得了一个遗传转化效率为82.9%并且农艺性状更优良的家系YE3。本研究为棉花的遗传转化及基因功能研究拓展了陆地棉基因型种质资源。

关键词：棉花重组自交系体细胞胚胎发生再生能力遗传转化效率

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双膦酸盐抗三种顶复门原虫研究进展

中国人兽共患病学报 2024年第2期40卷 185-190,196页

作者：侯文燕张营营张龙现张素梅河南农业大学动物医学院郑州450046 河南省人兽共患病国际联合实验室郑州450046

顶复门原虫可引起严重疾病威胁人类健康,如每年导致近100万人死亡的疟原虫,感染全球约1/3人口的弓形虫以及导致新生儿腹泻的隐孢子虫等。这3种顶复门原虫对全球的生物安全和公共卫生构成巨大隐患,且目前在临床上有效治疗药物有限。双膦... 详细信息

顶复门原虫可引起严重疾病威胁人类健康,如每年导致近100万人死亡的疟原虫,感染全球约1/3人口的弓形虫以及导致新生儿腹泻的隐孢子虫等。这3种顶复门原虫对全球的生物安全和公共卫生构成巨大隐患,且目前在临床上有效治疗药物有限。双膦酸盐临床上广泛用于治疗骨代谢疾病,但其化合物可有效抑制顶复门原虫生长,作用机制为竞争性抑制寄生虫类异戊二烯分子生物合成的2C-甲基-D-赤藓糖醇-4-磷酸途径(MEP途径)中的法尼基焦磷酸合酶,干扰类异戊二烯化合物的合成而发挥作用。本文综述了双膦酸盐化合物在疟原虫、弓形虫和隐孢子虫方面的相关研究,以期为临床治疗相关疾病提供理论基础。

关键词：疟原虫弓形虫隐孢子虫双膦酸盐类异戊二烯 MEP途径

The HD-Zip transcription factor GhHB12 represses plant height by regulating the auxin signaling in cotton

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Journal of Integrative Agriculture 2023年第7期22卷 2015-2024页

作者： LIU Yan WANG Wei-ping zhang Lin ZHU long-fu zhang xian-long HE Xin College of Agronomy Hunan Agricultural UniversityChangsha 410128P.R.China National Key Laboratory of Crop Genetic Improvement Huazhong Agricultural UniversityWuhan 430070P.R.China

Upland cotton(Gossypium hirsutum L.)is the most important natural textile fiber crop *** height(PH)is a significant component of plant architecture,strongly influencing crop cultivation patterns,overall yield,and economic ***,cotton genes regulating plant height have not been fully ***,an HD-Zip gene(GhHB12)was isolated and characterized in cotton,which regulates the abiotic and biotic stress responses and the growth and development *** this study,we showed that GhHB12 was induced by ***,overexpression of GhHB12 induces the expression of HY5,ATH1,and HAT4,represses the spatial-temporal distribution,polar transport,and signaling of auxin,alters the expression of genes involved in cell wall expansion,and restrains the plant height in *** results suggest a role of GhHB12 in regulating cotton plant height,which could be achieved by affecting the auxin signaling and cell wall expansion.

关键词： cotton GhHB12 plant height auxin cell wall HD-Zip

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马属动物源十二指肠贾第虫流行研究进展

动物医学进展 2024年第3期45卷 116-120页

作者：朱姝颖张苗苗孙静静李晓迎张龙现李俊强河南农业大学动物医学院河南郑州450046 河南省人兽共患病国际联合实验室河南郑州450046

十二指肠贾第虫(Giardia duodenalis)是一种呈世界性分布的人兽共患寄生性原虫,主要寄生于人和多种哺乳动物的肠道内,造成宿主腹泻及生长发育迟缓等,严重危害畜牧养殖业发展和人体健康。加强对于十二指肠贾第虫的研究具有重要的公共卫... 详细信息

十二指肠贾第虫(Giardia duodenalis)是一种呈世界性分布的人兽共患寄生性原虫,主要寄生于人和多种哺乳动物的肠道内,造成宿主腹泻及生长发育迟缓等,严重危害畜牧养殖业发展和人体健康。加强对于十二指肠贾第虫的研究具有重要的公共卫生意义。论文对马属动物源十二指肠贾第虫的流行病学情况进行了总结,分析了不同地区、年龄、性别和养殖方式的马属动物感染十二指肠贾第虫的分布情况,阐明了不同风险因素对十二指肠贾第虫的流行率和基因型分布的影响,以期更好的了解十二指肠贾第虫在马属动物中的流行情况,为贾第虫病的综合防控提供参考。

关键词：马属动物十二指肠贾第虫流行病学基因型分布

Communication Resource-Efficient Vehicle Platooning Control With Various Spacing Policies

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IEEE/CAA Journal of Automatica Sinica 2024年第2期11卷 362-376页

作者： Xiaohua Ge Qing-long Han xian-Ming zhang Derui Ding IEEE School of Science Computing and Engineering TechnologiesSwinburne University of TechnologyMelbourne VIC 3122Australia

Platooning represents one of the key features that connected automated vehicles may possess as it allows multiple automated vehicles to be maneuvered cooperatively with small headways on roads. However, a critical challenge in accomplishing automated vehicle platoons is to deal with the effects of intermittent and sporadic vehicle-to-vehicle data transmissions caused by limited wireless communication resources. This paper addresses the co-design problem of dynamic event-triggered communication scheduling and cooperative adaptive cruise control for a convoy of automated vehicles with diverse spacing policies. The central aim is to achieve automated vehicle platooning under various gap references with desired platoon stability and spacing performance requirements, while simultaneously improving communication efficiency. Toward this aim, a dynamic event-triggered scheduling mechanism is developed such that the intervehicle data transmissions are scheduled dynamically and efficiently over time. Then, a tractable co-design criterion on the existence of both the admissible event-driven cooperative adaptive cruise control law and the desired scheduling mechanism is derived. Finally, comparative simulation results are presented to substantiate the effectiveness and merits of the obtained results.

关键词： Automated vehicles constant time headway spacing constant spacing cooperative adaptive cruise control event-triggered communication vehicle platooning

Accumulated-state-error-based event-triggered sampling scheme and its application to H∞ control of sampled-data systems

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Science China(Information Sciences) 2024年第6期67卷 328-341页

作者： xian-Ming zhang Qing-long HAN Bao-Lin zhang Xiaohua GE Dawei zhang School of Science Computingand Engineering TechnologiesSwinburne University of Technology College of Automation and Electronic Engineering Qingdao University of Science & Technology School of Mathematics Shandong University

This paper is concerned with event-triggered H∞control of sampled-data systems. Its novelties lie in three aspects:（i） A novel accumulated-state-error-based event-triggered scheme is introduced by comparing the integral of the state error from tk to t with the system state sampled at tk. This condition works well due to the fact that the so-called Zeno behaviour does not occur.（ii） A novel Lyapunov functional is constructed to establish a criterion to ensure some certain H∞performance of the closed-loop system. This Lyapunov functional is dependent on the integral of the state error involved in the event-triggered scheme.（iii） Under the event-triggered sampling scheme, suitable state-feedback controllers can be designed rather than be given a priori. Moreover, a self-triggered implementation of the proposed event-triggered sampling scheme is presented as well. Finally, a batch reactor model and an inverted pendulum system are given to demonstrate the effectiveness of the proposed method.

关键词： event-triggered sampling self-triggered implementation $H_\infty$ control looped-functional

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Highly Improved Creep Resistance in Polypropylene Through Thermally Reduced Graphene Oxide and Its Creep Lifetime Prediction

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Chinese Journal of Polymer Science 2024年第2期42卷 256-266,I0010页

作者： Can-Can zhang Jun-long Yang Ya-Jiang Huang Guang-xian Li College of Polymer Science and Engineering State Key Laboratory of Polymer Materials Engineering of ChinaSichuan UniversityChengdu610065China

Polypropylene(PP) exhibits suboptimal creep resistance due to the presence of methyl groups on its main chain, leading to irregular chain segment distribution, diminished inter-chain interaction, and crystallinity. This structural feature causes chain slippage in PP under stress,significantly constraining its service lifetime. In this study, thermally reduced graphene oxide(TrGO) nanosheets were incorporated into the PP matrix, yielding a nanocomposite with exceptional creep resistance performance. Results demonstrated that at a stress of 25 MPa, a 2.0 wt% TrGO content could enhance the creep failure lifetime of PP by 21.5 times compared to neat PP. Rheology, transmission electron microscopy(TEM),and scanning electron microscopy(SEM) characterization techniques were employed to analyze the mechanism of TrGO's influence on PP's creep behavior. It was observed that when TrGO content exceeded 1.0 wt%, an effective particle network structure formed within the PP matrix. This homogeneously dispersed TrGO-formed particle network structure restricted the migration and rearrangement of PP molecular chains, enabling prolonged stress resistance without structural failure. By combining the time-strain superposition method with the critical failure strain as a criterion, generalized creep compliance curves for PP and its composites were established, facilitating the prediction of material creep failure lifetimes, with a strong agreement between experimental and predicted lifetime values. This research proposes a novel strategy aimed at developing polypropylene materials and products with enhanced long-term stability and durability, thus extending service life, reducing failure risk, and broadening their potential across various application domains.

关键词： Thermally reduced graphene oxide Polypropylene Creep failure and lifetime prediction

Changes in Intra-pelvic Obliquity Angle 0-2 Years After Total Hip Arthroplasty and Its Effects on Leg Length Discrepancy：A Retrospective Study

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Chinese Medical Journal 2015年第10期128卷 1346-1350页

作者： Yin zhang Tao Cheng xian-long zhang Department of Orthopaedics Shanghai Jiao Tong University Affiliated Sixth People&#39 s Hospital Shanghai 200233China

Background：Total hip arthroplasty （THA） is one of the most effective treatments for phase Ⅲ and Ⅳ hip *** limb length balancing is one of the determining factors of a successful surgery,particularly in patients with developmental dysplasia of the hip （DDH）.The purpose of this study was to evaluate the postoperative change in intra-pelvic obliquity （intra-PO） angle in the coronal plane and its effects on leg length discrepancy （LLD） within 2 ***：A total of 78 patients （70 females,8 males） were enrolled in this *** patients were suffering from DDH with varying degrees of *** plain radiographs were collected before and after the *** intra-PO angles were measured 0,0.5,1 and 2 years after *** the same time,postoperative LLD was measured with blocking ***：PO changed significantly in the first year after THA surgery （0 year vs.0.5 year,P 〈 0.01;0.5 year vs.1 year,P 〈 0.01）,and the changing value of intra-PO angle （△PO） slowed down substantially during the first 2 years after THA （0.5 year vs.0.5-1 year,P 〈 0.01;0.5-1 year vs.1-2 years,P 〈 0.01）.With the change in intra-PO angle,LLD also got narrow within the 1st year （0 year vs.0.5 year,P 〈 0.01;0.5 year vs.1 year,P 〈 0.01）.Elderly patients had a smaller intra-PO angle reduction （Group A *** B,P =0.01;Group B *** C,P〈 0.01）.Conclusions：Intra-PO angle and LLD gap narrowed with time after THA *** particular,elderly patients had smaller change in intra-PO angle.

关键词： Age Related Leg Length Discrepancy Pelvic Obliquity Prosthesis Orientation Total Hip Arthroplasty