检索结果-南通市图书馆

Fabrication and Characterization of High-Bonding-Strength Al/Ti/Al-Laminated Composites via Cryorolling

在线全文

学校读者我要写书评

暂无评论

Acta Metallurgica Sinica(English Letters) 2020年第6期33卷 871-880页

作者： Juan Liu yuze Wu lin Wang Hui Wang Charlie Kong Alexander Pesin Alexander PZhilyaev Hailiang Yu State Key Laboratory of High Performance Complex Manufacturing Central South UniversityChangsha 410083China College of Mechanical and Electrical Engineering Central South UniversityChangsha 410083China Light Alloys Research Institute Central South UniversityChangsha 410083China Research Center for Advanced Science and Technology The University of TokyoMeguroTokyo 1530041Japan Mark Wainwright Analytical Centre University of New South WalesSydneyNSW 2052Australia Laboratory of Mechanics of Gradient Nanomaterials Nosov Magnitogorsk State Technical UniversityMagnitogorskRussia 455000

Sandwich-like Al/Ti/Al-laminated composites have many advantages such as low density and high specific strength with value in mechanical manufacturing and aerospace engineering. Here, Al/Ti/Al-laminated composites were fabricated by hot roll bonding and subsequent processes: cryorolling(-190 ℃ and-100 ℃), cold rolling(25 ℃), and hot rolling(300 ℃). Their bonding strength and mechanical properties were then studied by an Autograph AGS-X universal electronic testing machine. The results show that cryorolling can improve the interface bonding strength and tensile strength of Al/Ti/Allaminated composites. For the Al/Ti/Al-laminated composites subjected to cryorolling at-100 ℃, they have the highest strength near 260 MPa—this is 48 MPa and 41 MPa higher than the laminated composites subjected to cold and hot rolling, respectively. These results also show the strongest peeling strength. Finally, the mechanisms of the enhancement of bonding strength and mechanical properties of Al/Ti/Al-laminated composites subjected to cryorolling were mainly discussed.

关键词： Laminated composites Cryorolling Bonding strength Peeling strength Mechanical property Bonding mechanism

Assessing the effects of oyster/kelp weight ratio on water column properties: an experimental IMTA study at Sanggou Bay, China

在线全文

学校读者我要写书评

暂无评论

Journal of Oceanology and Limnology 2020年第6期38卷 1914-1924页

作者： FANG Jinghui FANG Jianguang CHEN Qionglin MAO yuze JIANG Zengjie DU Meirong GAO Yaping lin Fan Laboratory for Marine Fisheries Science and Food Production Processes Pilot National Laboratory for Marine Science and Technology(Qingdao)/Yellow Sea Fisheries Research InstituteChinese Academy of Fishery SciencesQingdao 266071China Key Laboratory of Marine Biotechnology of Zhejiang Province School of Marine SciencesNingbo UniversityNingbo 315211China

Integrated Multi-Trophic Aquaculture(IMTA)is an effective method for sustainable aquaculture as species from different trophic levels could reduce negative effects from fed species in the environment.A proper proportion of different trophic species in an IMTA system could improve the aquaculture production and environmental *** present,research on the proper proportions for farming species is *** investigated the effects of IMTA modes of oyster(Crassostrea gigas)and kelp(Saccharina japonica)in different weight ratios on water quality and carbonate system in a closed enclosure experiment for three days in the Sanggou Bay in Shandong Province,China,in December *** collocation modes in oyster:kelp weight ratio were tested showing as 24:3,24:2,24:1,16:3,16:2,16:1,8:3,8:2,and 8:*** water parameters were determined at 17:00 on Day 1(D1),and 6:00 and 17:00 on Days 2(D2)and 3(D3).As two-way ANOVA showed,all increased parameters(dissolved oxygen(DO),pH,chl a,the carbonate system and pCO2)were significantly related to oyster-kelp modes,and interaction between modes and time were also significant(P<0.05).On the 3th day,the 8:3 mode was the highest in DO,pH,chl a,CO32-(P<0.05),and dissolved inorganic carbon(DIC),HCO3-,CO2,and pCO2 were the lowest(P<0.05).According to previous references and the results of this study,the appropriate oyster:kelp proportion at the beginning of winter is from 8:2 to 8:*** results of this study may help government to optimize the aquaculture structure of Sanggou Bay.

关键词： Integrated Multi-Trophic Aquaculture(IMTA) Pacific oyster Crassostrea gigas kelp Saccharina japonica

行政区划调整中的尺度重构:规则、实践与理念——以湖城撤市设区为例

在线全文

学校读者我要写书评

暂无评论

行政论坛 2023年第1期30卷 61-68,F0002页

作者：杨宇泽叶林中南大学公共管理学院湖南长沙410075 中山大学政治与公共事务管理学院广东广州510275

近年来,尺度这一概念被越来越多地应用于我国城市治理议题包括行政区划调整的研究之中。基于对尺度概念的多重本体论认识,行政区划调整中的尺度重构同时存在作为规则、实践与理念的三维面向。不同维度的尺度重构既相互关联又相对独立,... 详细信息

近年来,尺度这一概念被越来越多地应用于我国城市治理议题包括行政区划调整的研究之中。基于对尺度概念的多重本体论认识,行政区划调整中的尺度重构同时存在作为规则、实践与理念的三维面向。不同维度的尺度重构既相互关联又相对独立,其中的复杂互动对行政区划调整的现实进程和走向产生深远影响。在此框架下从微观层面剖析尺度重构不同维度的表征及其差异,并对其中的互动关系进行探讨,深化对行政区划调整运作逻辑的理解,进一步丰富尺度重构理论体系,推动其在中国情境下的发展和实践应用。

关键词：尺度尺度重构行政区划调整撤市设区

Response of Yesso scallop Patinopecten yessoensis to acute temperature challenge: physiological and biochemical parameters

在线全文

学校读者我要写书评

暂无评论

Journal of Oceanology and Limnology 2019年第1期37卷 321-329页

作者： JIANG Weiwei DU Meirong FANG Jianguang GAO Yaping MAO yuze CHEN Qionglin lin Fan JIANG Zengjie Key Laboratory of Sustainable Development of Marine Fisheries Ministry of Agriculture Yellow Sea Fisheries Research Institute Chinese Academy of Fishery Sciences Laboratory for Marine Fisheries Science and Food Production Processes Qingdao National Laboratory for Marine Science and Technology

Water temperature is generally considered to be a major factor af fecting the physiological and biochemical activities of marine bivalves. Here, the physiological and biochemical responses of Yesso scallop, Patinopecten yessoensis, to acute water temperature changes in summer were studied. Scallops were transferred directly to a lower temperature( T dec treatment)(from 23°C to 15°C) or to a higher temperature( Ti nc treatment)(from 15°C to 23°C) for 72 h, respectively. Results showed that the oxygen consumption and ammonia-N excretion rates of P. yessoensis decreased signi?cantly in the T dec treatment but increased dramatically at 6 h in the Ti nc treatment( P <0.05). In the T dec treatment, hepatopancreas antioxidant enzyme activities, superoxide dismutase(SOD) and catalase(CAT) activities, increased substantially within 72 h( P <0.05). However, a signi?cant decrease in CAT activity was found at 12 h in the Ti nc treatment( P <0.01).A signi?cant enhancement of acid phosphatase(ACP) activity and malondialdehyde(MDA) content was detected when scallops were acutely exposed to a temperature of 15°C. The levels of Cu/Zn-SOD gene expression in their gills up-regulated signi?cantly in response to acute temperature changes( P <0.01). These data suggest that acute temperature change af fects physiological and biochemical functions, and improve our knowledge of P. yessoensis under conditions of thermal stress.

关键词： Patinopecten yessoensis acute water temperature changes physiology biochemical activities

A post-GWAS confirming the genetic effects and functional polymorphisms of AGPAT3 gene on milk fatty acids in dairy cattle

在线全文

学校读者我要写书评

暂无评论

Journal of Animal Science and Biotechnology 2021年第1期12卷 122-140页

作者： Lijun Shi Xin Wu yuze Yang Zhu Ma Xiaoqing Lv lin Liu Yanhua Li Feng Zhao Bo Han Dongxiao Sun Department of Animal Genetics Breeding and ReproductionCollege of Animal Science and TechnologyKey Laboratory of Animal GeneticsBreeding and Reproduction of Ministry of Agriculture and Rural AffairsNational Engineering Laboratory for Animal BreedingChina Agricultural UniversityNo.2 Yuanmingyuan West RoadHaidian DistrictBeijing 100193China Institute of Animal Science Chinese Academy of Agricultural SciencesBeijing 100193China Beijing General Station of Animal Husbandry Beijing 100101China Beijing Dairy Cattle Center Beijing 100192China.

Background: People are paying more attention to the healthy and balanced diet with the improvement of their living standards. Milk fatty acids(FAs) have been reported that they were related to some atherosclerosis and coronary heart diseases in human. In our previous genome-wide association study(GWAS) on milk FAs in dairy cattle, 83 genomewide significant single nucleotide polymorphisms(SNPs) were detected. Among them, two SNPs, ARS-BFGL-NGS-109493 and BTA-56389-no-rs associated with C18 index(P = 0.0459), were located in the upstream of 1-acylglycerol-3-phosphate O-acyltransferase 3(AGPAT3) gene. AGPAT3 is involved in glycerol-lipid, glycerol-phospholipid metabolism and phospholipase D signaling pathways. Hence, it was inferred as a candidate gene for milk FAs. The aim of this study was to further confirm the genetic effects of the AGPAT3 gene on milk FA traits in dairy ***: Through re-sequencing the complete coding region, and 3000 bp of 5′ and 3′ regulatory regions of the AGPA T3 gene, a total of 17 SNPs were identified, including four in 5′ regulatory region, one in 5′ untranslated region(UTR),three in introns, one in 3′ UTR, and eight in 3′ regulatory region. By the linkage disequilibrium(LD) analysis with Haploview4.1 software, two haplotype blocks were observed that were formed by four and 12 identified SNPs,respectively. Using SAS9.2, we performed single locus-based and haplotype-based association analysis on 24 milk FAs in 1065 Chinese Holstein cows, and discovered that all the SNPs and the haplotype blocks were significantly associated with C6:0, C8:0 and C10:0(P A, g.146704373 A > G, g.146704618 A > G and g.146704699 G > A) changed the transcription factor binding sites(TFBSs) for transcription factors SMARCA3, REX1, VMYB, BRACH, NKX26, ZBED4, SP1, USF1, ARNT and FOXA1. Out of them, two SNPs were validated to impact transcriptional ac

关键词： AGPAT3 Chinese Holstein Genetic effects Milk fatty acids Potential causal mutation

I-IBV life cycle is restricted in mouse hepatocytes .~xpressing human NTCP

在线全文

学校读者我要写书评

暂无评论

Cellular & Molecular Immunology 2014年第2期11卷 175-183页

作者： Hanjie Li Qiuyu Zhuang yuze Wang Tianyi'ng Zhang Jinghua Zhao Yali Zhang Junfang Zhang Yi lin Quan Yuan Ningshao Xia Jiahuai Han State Key Laboratory of Cellular Stress Biology Innovation Center for Ceil Biology and School of Life Sciences Xiamen University Xiamen 361005 China School of Chemical Engineering Huaqiao University Xiamen 361005 China and National Institute of Diagnostics and Vaccine Development in InfectiousDisease School of Public Health Xiamen University Xiamen 361005 China These authors contributed equally to this work.

Recent studies have revealed that human sodium taurocholate cotransporting polypeptide （SLC10A1 or NTCP） is a functional cellular receptor for hepatitis B virus （HBV）. However, whether human NTCP can support HBV infection in mouse hepatocyte cell lines has not been clarified. Because an HBV-permissible mouse model would be helpful for the study of HBV pathogenesis, it is necessary to investigate whether human NTCP supports the susceptibility of mouse hepatocyte cell lines to HBV. The results show that exogenous human NTCP expression can render non-susceptible HepG2 （human）, Huh7 （human）, Hepal-6 （mouse）, AML-12 （mouse） cell lines and primary mouse hepatocyte （PMH） cells susceptible to hepatitis D virus （HDV） which employs HBV envelope proteins. However, human NTCP could only introduce HBV susceptibility in human-derived HepG2 and Huh7 cells, but not in mouse-derived Hepal-6, AML-12 or PMH cells. These data suggest that although human NTCP is a functional receptor that mediates HBV infection in human cells, it cannot support HBV infection in mouse hepatocytes. Our study indicated that the restriction of HBV in mouse hepatocytes likely occurs after viral entry but prior to viral transcription. We have excluded the role of mouse hepatocyte nuclear factors in the restriction of the HBV life cycle and showed that knockdown or inhibition of Sting, TBK1, IRF3 or IRF7, the components of the anti-viral signaling pathways, had no effect on HBV infection in mouse hepatocytes. Therefore, murine restriction factors that limit HBV infection need to be identified before a HBV-permissible mouse line can be created.

关键词： HBV HDV NTCP

基于GO-Markov的飞机燃油闭环控制系统可靠性分析

维普期刊数据库评论

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

兵工学报 2022年第6期43卷 1447-1455页

作者：李景奎林文杰江秀红卢雨泽沈阳航空航天大学民用航空学院辽宁沈阳110136 沈阳航空航天大学电子信息工程学院辽宁沈阳110136

飞机燃油控制系统是发动机的能量控制中枢,对飞机的飞行性能有重要影响。发动机电子控制器通过调节进入燃烧室的燃油流量来控制发动机的推力,同时旁通活门反向打开形成闭环反馈控制系统。利用GO法难以准确对其进行可靠性分析,为此提出... 详细信息

飞机燃油控制系统是发动机的能量控制中枢,对飞机的飞行性能有重要影响。发动机电子控制器通过调节进入燃烧室的燃油流量来控制发动机的推力,同时旁通活门反向打开形成闭环反馈控制系统。利用GO法难以准确对其进行可靠性分析,为此提出一种基于GO法的系统可靠性计算方法。依据飞机燃油控制系统原理图建立GO模型,对闭环回路环节进行状态组合。利用马尔可夫状态转移过程获得状态转移矩阵,推导出闭环回路环节的稳态概率公式,并对某型飞机燃油控制系统进行可靠性计算。计算结果表明,在不改变GO法建模规则的前提下,该方法考虑了闭环回路反馈信号对系统可靠性的影响,能更真实地反映飞机燃油闭环控制系统的可靠性。

关键词：飞机燃油闭环控制系统系统可靠性分析 GO法闭环回路反馈信号

压电驱动器Wiener模型的辨识与复合控制

在线全文

学校读者我要写书评

暂无评论

机械设计与研究 2022年第4期38卷 65-70,77页

作者：吴与泽张慧萍林剑锋齐臣坤上海交通大学巴黎卓越工程师学院上海200240 上海航天技术研究院上海201109 上海交通大学机械与动力工程学院上海200240

针对压电陶瓷驱动器的线性与非线性特性,研究了基于Wiener模型的前馈补偿结合PID的复合控制策略。首先研究了一种基于Wiener模型的辨识方法,称为TLN(two-linear-nonlinear)-Wiener模型,同时对压电陶瓷驱动器的线性与非线性特性进行建模... 详细信息

针对压电陶瓷驱动器的线性与非线性特性,研究了基于Wiener模型的前馈补偿结合PID的复合控制策略。首先研究了一种基于Wiener模型的辨识方法,称为TLN(two-linear-nonlinear)-Wiener模型,同时对压电陶瓷驱动器的线性与非线性特性进行建模,求取并推导了逆模型,用于前馈控制环节的设计。最后,在实验中完成了模型的辨识以及信号跟踪实验。实验结果表明,TLN-Wiener模型能有效地对压电陶瓷驱动器的线性与非线性环节进行建模。在前馈补偿结合PID的复合控制下,轨迹跟踪的均方根误差相较与PID直接控制减少了70%,前馈补偿复合控制具有更好的稳定性与跟踪性能。

关键词：压电陶瓷前馈控制维纳

在线全文

学校读者我要写书评

暂无评论

无接地极直流输电线路金属回线选型设计

吉林电力 2022年第1期50卷 5-9页

作者：林芳向宇雷雨泽中国电力工程顾问集团中南电力设计院有限公司武汉430071

为了有效解决高压直流输电系统接地极极址及线路路径选择困难的问题,考虑采用金属回线与极导线同塔架设的方案,对金属回线的特点进行了分析,提出了金属回线选型的主要原则,并以典型±800 kV直流输电线路为例,进行了金属回线的比选分析,... 详细信息

为了有效解决高压直流输电系统接地极极址及线路路径选择困难的问题,考虑采用金属回线与极导线同塔架设的方案,对金属回线的特点进行了分析,提出了金属回线选型的主要原则,并以典型±800 kV直流输电线路为例,进行了金属回线的比选分析,推荐采用JNRLH1/G3A-500/45钢芯耐热铝合金绞线作为金属回线。

关键词：无接地极直流输电线路金属回线选型设计