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Design and performance study of a segmented intelligent isolation bearing

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International Journal of Smart and Nano Materials 2021年第4期12卷 511-532页

作者： Guo-Jun yu xi-xi Wen Cheng-Bin Du Ling-yun Wang Shao-Jie zhu Faculty of Civil Engineering and Mechanics Jiangsu UniversityZhenjiangJiangsu ProvinceChina Department of Engineering Mechanics Hohai UniversityNanjingChina

In this paper,a novel type of isolator,named segmented intelligent isolation bearing(SIIB),is designed and manufactured,which can meet the requirements of seismic fortification under three seismic intensities,*** intensity,basic intensity,and rare intensity.A theoretical formula for the output of the SIIB is established to provide a basis for the determination of the size of the *** and STMP used in SIIB were prepared,of which the changes of shear storage modulus and damping factor with the magnetic field under different strain are *** mechanical properties of the SIIB under small displacement,medium displacement,and large displacement are tested,respectively,and the hysteretic characteristics of force–displacement are *** dynamic mechanical model combining the rheological model,phenomenological model,and bilinear restoring force model is established to represent the behavior of the *** results showed that the theoretical results agree well with the experimental results,and the model can significantly reflect the dynamic characteristics of SIIB.

关键词： Isolation magnetorheological elastomer(MRE) shear thickening magnetorheological plastics(STMP) performance analysis

The Effect of Vineyard Cover Crop on Main Monomeric Phenols of Grape Berry and Wine in Vitis viniferal L. cv. Cabernet Sauvignon

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Agricultural Sciences in China 2010年第3期9卷 440-448页

作者： xi zhu-mei ZHANG Zhen-wen CHENG yu-feng LI Hua College of Enology Northwest A＆F University/Shaanxi Engineering Research Center for Viti-Viniculture Yangling 712100 P.R.China

This study was conducted to determine the effect of cover crop inter-row in vineyard on main mono-phenol content of grape berry and wine. Three such cover crops, two perennial legumes （white clover and alfalfa） and a perennial gramineous grass （tall fescue） were sown in vineyard. The main phenolic compounds of mature grape berry and wines vinified under the same conditions were extracted with ethyl acetate and diethyl ether and analyzed by high- performance liquid chromatography （HPLC） by comparing to soil tillage. A total of ten phenolic compounds were identified and quantified in the different grape berry and wines, including nonflavonoids （hydroxybenzoic and hydroxycinnamic acids） and flavonoids （flavanols and flavonols）. The concentration of flavonoid compounds （409.43 to 538.63 mg kg^-1 and 56.16 to 81.30 mg L^-1） was higher than nonflavonoids （76.91 to 98.85 mg kg^-1 and 30.65 to 41.22 mg L^-1） for Cabernet Sauvignon grape and wine under different treatments, respectively. In the flavonoid phenolics, Catechin was the most abundant in the different grapes and wines, accounting for 74.94 to 79.70% and 48.60 to 50.62% of total nonanthocyanin phenolics quantified, respectively. Compared to soil tillage, the sward treatments showed a higher content of main mono-phenol and total nonanthocyanin phenolics in grapes and wines. There were significant differences between two cover crop treatments （tall fescue and white clover） and soil tillage for the content of benzoic acid, salicylic acid, caffeic acid, catechin, and total phenolics in the grape berry （P 〈 0.05 or P〈0.01）. The wine from tall fescue cover crop had the highest gallic acid, caffeic acid and catechin. Cover crop system increased the total nonanthocyanin phenolics of grapes and wines in order of the four treatments： tall fescue, white clover, alfalfa, and soil tillage （control）. Cover crop in vineyard increased total phenols of grape berry and wine, and thus improved the quality of wine evidently.

关键词： vineyard cover crops inter-row Cabernet Sauvignon grape berry wine monomeric phenols

电子设计竞赛视角下的模拟电子技术教学改革与实践

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价值工程 2016年第28期35卷 165-166页

作者：王文静唐建锋谢宇希朱亚培衡阳师范学院南岳学院衡阳421000

本文以全国大学生电子设计竞赛为引导,针对在学生参加比赛和教学过程中暴露出模拟电子技术传统教学方式的不足,提出了针对模拟电子技术的项目化教学改革,详细的阐述了教学改革思路、措施以及实施过程。项目化教学的推进不仅提高了学生... 详细信息

本文以全国大学生电子设计竞赛为引导,针对在学生参加比赛和教学过程中暴露出模拟电子技术传统教学方式的不足,提出了针对模拟电子技术的项目化教学改革,详细的阐述了教学改革思路、措施以及实施过程。项目化教学的推进不仅提高了学生学习兴趣,培养了学生的动手实践能力和创新能力。

关键词：电子设计竞赛模拟电子技术项目化教学

Effect of carbon addition on creep behavior of cast TiAl alloy with hard-oriented directional lamellar microstructure

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Journal of Iron and Steel Research International 2020年第11期27卷 1347-1356页

作者： xi-wen Zhang yu-ling Tang Wen-juan Wan Chun-lei zhu Ji Zhang Beijing Key Laboratory of Advanced High Temperature Materials China Iron and Steel Research Institute GroupBeijing 100081China National Center for Electron Microscopy in Beijing School of Materials Science and EngineeringTsinghua UniversityBeijing 100084China

Two TiAl alloys,Ti-47.5Al-3.7(Cr,V,Zr)and Ti-47.5Al-3.7(Cr,V,Zr)-0.1C(at.%),were prepared by cold crucible levitation melting to couple the hard-oriented directional lamellar microstructure with carbon microalloying *** creep behavior and mechanism for the improvement in creep properties by carbon addition were investigated by mechanical tests and electron microscopy *** results show that obvious improvements on the creep properties at 760°C and 276 MPa are achieved by 0.1 at.%C addition into TiAl alloy with directional lamellar microstructure,which promotes the creep strain and minimum creep rate decreasing with a large *** minimum creep rate is reduced from 4.37×10^(-8) to 3.97×10^(-9) s^(-1),and the duration entering into creep acceleration is prolonged for more than 10 *** mechanism for creep property improvement by 0.1%C addition is attributed to two *** first one is that Ti_(2) AlC is found to be strong obstacles of 1/2[110]dislocations when moving across the lamellar interface in the carbon containing *** other one is that the in terfacial dislocatio ns are effectively impeded and the release process is hindered by dynamic precipitation of Ti_(3) AlC,which is proposed to be the special mechanism for creep resistance improvement of this hard-oriented directional lamellar microstructure.

关键词： Cast titanium aluminide Lamellar microstructure Creep behavior Carbon addition Dynamic precipitation

有Bernoulli中断休假和随机启动时间的N-策略多重休假M=G=1排队的队长分析

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应用数学 2025年第1期38卷 276-293页

作者：李茜唐应辉余玅妙魏瑛源四川师范大学数学科学学院四川成都610068 河西学院数学与统计学院甘肃张掖734000

本文研究一个有Bernoulli中断休假和随机启动时间的N-策略多重休假M/G/1排队模型,其中Bernoulli中断休假是指:如果在休假中有顾客到达,服务员以概率p(0≤p≤1)立即中断休假回到系统中并启动服务设施,以概率(1−p)不中断休假直到此次休假... 详细信息

本文研究一个有Bernoulli中断休假和随机启动时间的N-策略多重休假M/G/1排队模型,其中Bernoulli中断休假是指:如果在休假中有顾客到达,服务员以概率p(0≤p≤1)立即中断休假回到系统中并启动服务设施,以概率(1−p)不中断休假直到此次休假结束后才回到系统启动服务设施.当系统的启动完成后,若系统中顾客数大于等于事先设置的阈值N(≥1),则服务员开始为顾客服务直到系统再次变空.运用全概率分解技术和更新过程理论讨论了系统在时刻t队长的瞬态概率分布,得到了队长瞬态概率分布的拉普拉斯变换表达式.在瞬态分析的基础上,使用洛必达法则和一些代数运算推导出了队长稳态概率分布的递推表达式,以及其它一些排队指标,如队长稳态概率分布的母函数、平均队长和附加队长的概率分布等.最后,讨论了一些特殊情形.

关键词： Bernoulli中断休假随机启动时间 N-策略全概率分解队长分布

员工主动性人格与创新行为的关系:基于趋利-避害框架理论的实证研究

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管理工程学报 2025年第2期39卷 41-56页

作者：严鸣赵楚铃朱瑜邬金涛暨南大学管理学院广东广州510632 中山大学岭南学院广东广州510275

员工的创新行为能为员工个体和组织带来益处,但同时也会给员工带来较大风险,而现有研究未解决员工在面对潜在风险时仍会表现出创新行为这个问题。本文基于趋利-避害框架理论,通过163个团队的489份数据,探讨了趋利型/避害型主动性人格影... 详细信息

员工的创新行为能为员工个体和组织带来益处,但同时也会给员工带来较大风险,而现有研究未解决员工在面对潜在风险时仍会表现出创新行为这个问题。本文基于趋利-避害框架理论,通过163个团队的489份数据,探讨了趋利型/避害型主动性人格影响员工不同类型创新行为的内在作用机制和边界条件。研究发现,趋利型主动性人格通过机会发掘动机间接影响增益型创新行为,而避害型主动性人格通过问题发掘动机间接影响避害型创新行为。团队内授权氛围不仅会调节趋利型主动人格与机会发掘动机的关系,还会进一步调节趋利型主动型人格通过机会发掘动机间接影响增益型创新行为的关系。同时,团队间竞争氛围可以调节避害型主动人格与问题发掘动机的关系,进一步调节避害型主动型人格通过问题发掘动机间接影响避害型创新行为的关系。本文在理论上有助于澄清主动性人格的实质及其对不同类型创新行为的影响效应和作用机制,为提高企业创新行为管理水平提供管理启示。

关键词：主动性人格创新行为趋利避害框架理论团队内授权氛围团队间竞争氛围

Radiation Recall Reaction:Two Case Studies Illustrating an Uncommon Phenomenon Secondary to Anti-Cancer Agents

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Clinical oncology and cancer researeh 2012年第3期9卷 202-204页

作者： Su-yu zhu yuan yuan Zhen xi Department of Radiation Oncology Xiangya Medical College Affiliated Cancer Hospital of Hu'nan ProvinceZhongnan University

Radiation recall phenomenon is a tissue reaction that develops throughout a previously irradiated area,precipitated by the administration of certain *** recall is uncommon and easily neglected by physicians;hence,this phenomenon is underreported in *** manuscript reports two cases of radiation ***,a 44-year-old man with nasopharyngeal carcinoma was treated with radiotherapy in 2010 and subsequently developed multi-site bone metastases.A few days after the docetaxel-based chemotherapy,erythema and papules manifested dermatitis,as well as swallowing pain due to pharyngeal mucositis,developed on the head and neck that strictly corresponded to the previously irradiated ***,a 19-year-old man with recurrent nasal NK/T cell lymphoma initially underwent radiotherapy followed by chemotherapy after five *** and edema appeared only at the irradiated *** cases were considered chemotherapeutic agents that incurred radiation recall *** should be knowledgeable of and pay attention to such rare phenomenon.

关键词： radiation recall radiotherapy dermatitis pharyngitis docetaxel case report

Purification of specularite by centrifugation instead of flotation to produce iron oxide red pigment

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International Journal of Minerals,Metallurgy and Materials 2021年第1期28卷 56-65页

作者： xi Zhang Shun-wei zhu yu-jiang Li Yong-li Li Qiang Guo Tao Qi National Engineering Laboratory of Hydrometallurgical Cleaner Production Technology Institute of Process EngineeringChinese Academy of SciencesBeijing 100190China School of Environmental Science and Engineering Shandong UniversityQingdao 266200China Zhengzhou Institute of Emerging Industrial Technology Zhengzhou 450003China

This study used specularite, a high-gradient magnetic separation concentrate, as a raw material in reverse *** iron concentrate with a grade of 65.1 wt% and a recovery rate of 75.31% were obtained.A centrifugal concentrator served as the deep purification equipment for the preparation of iron oxide red pigments, and its optimal rotating drum speed, feed concentration, and other conditions were *** optimal conditions, a high-purity iron oxide concentrate with a grade of 69.38 wt% and a recovery rate of 80.89% were obtained and used as a raw material for preparing iron oxide red *** with sulfuric acid produced iron red pigments with different ***, middlings with a grade of 60.20 wt% and a recovery rate of 17.51% were obtained and could be used in blast furnace ***-value utilization of specularite beneficiation products was thus achieved.

关键词： specularite reconcentration centrifugal concentrator iron oxide red pigment

Techniques for detecting protein-protein interactions in living cells:principles, limitations, and recent progress

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Science China(Life Sciences) 2019年第5期62卷 619-632页

作者： Yaning Cui xi Zhang Meng yu Yingfang zhu Jingjing xing Jinxing Lin Beijing Advanced Innovation Center for Tree Breeding by Molecular Design Beijing Forestry University College of Biological Sciences & Biotechnology Beijing Forestry University Institute of Plant Stress Biology State Key Laboratory of Cotton Biology Department of Biology Henan University

Detecting protein-protein interactions(PPIs) provides fundamental information for understanding biochemical processes such as the transduction of signals from one cellular location to another; however, traditional biochemical techniques cannot provide sufficient spatio-temporal information to elucidate these molecular interactions in living cells. Over the past decade, several new techniques have enabled the identification and characterization of PPIs. In this review, we summarize three main techniques for detecting PPIs in vivo, focusing on their basic principles and applications in biological studies. We place a special emphasis on their advantages and limitations, and, in particular, we introduced some uncommon new techniques, such as single-molecule FRET(smFRET), FRET-fluorescence lifetime imaging microscopy(FRET-FLIM), cytoskeleton-based assay for protein-protein interaction(CAPPI) and single-molecule protein proximity index(smPPI), highlighting recent improvements to the established techniques. We hope that this review will provide a valuable reference to enable researchers to select the most appropriate technique for detecting PPIs.

关键词： protein-protein interactions in vivo techniques RET PCA co-localization