检索结果-南通市图书馆

Investigation of the interior RC beam-column joints under monotonic antisymmetrical load

在线全文

学校读者我要写书评

暂无评论

Frontiers of Structural and Civil Engineering 2019年第6期13卷 1474-1494页

作者： Fei GAO zhiqiang tang Biao HU Junbo CHEN Hongping ZHU Jian MA School of Civil Engineering and Mechanics Huazhong University of Science and TechnologyWuhan 430074China Guangdong Provincial Key L aboratory of Durability for Marine Civil Engineering Shenzhen UniversityShenzhen 518060China Department of Civil and Environmental Engineering The Hong Kong Polytechnic UniversityHong Kong 999077China

The paper presents numerical findings of reinforced concrete interior beam-column joints under monotonic antisymmetrical *** finite element models considered compression and tension damage were calibrated by test results in terms of the load-displacement,failure modes,and strains of longitudinal *** emphasis was put on studying the effects of hoop reinforcement ratio in joint core and the axial compression ratio on the responses of the *** results show that,in addition to the truss and strut-and-tie mechanisms,the confinement mechanism also existed in the joint core.A certain amount of stirrup is not only able to enhance the confinement in joint core,undertake a part of shear force and thus to increase the shear capacity,prevent the outward buckling of steel bars in column,improve the stress distribution in joint core,delay cracking and restrain the propagation of cracks,but also to increase the yield load,decrease the yield displacement of beam and improve the joint ***,excessive horizontal stirrups contribute little to the joint *** a certain range,larger axial compression ratio is beneficial for the joint mechanical behavior,while it is negative when axial compression ratio is too large.

关键词： RC beam-column joint reinforcement ratio in joint core axial compression ratio finite element test

Direct observation of the Mpemba effect with water:Probe the mysterious heat transfer

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

InfoMat 2023年第2期5卷 1-10页

作者： zhiqiang tang Weidong Huang Yagang Zhang Yanxia Liu Lin Zhao School of Materials and Energy University of Electronic Science and Technology of ChinaChengduPeople's Republic of China State Key Laboratory of Electronic Thin Films and Integrated Devices University of Electronic Science and Technology of ChinaChengduPeople's Republic of China

The Mpemba effect is one of the most perplexing puzzles in *** it has been discussed extensively,direct observation of the Mpemba effect is extremely challenging and ***,we report the first systematic study of the Mpemba effect with water and clearly point out the conditions required for the observation of the Mpemba *** results demonstrate that hot water usually has a faster cooling rate than cold *** initial temperature,temperature difference,shape of the container,and water volume influence the heat exchange and the cooling *** to the influential factors of heat exchange,the Mpemba effect can only be observed under specific *** work helps to clarify doubts and confusion about the Mpemba effect and can offer alternative strategies for energy storage and transfer materials.

关键词： cooling rate energy storage and transfer heat transfer Mpemba effect

Binary-Sequence Frequency Hopping Communication Method Based on Pseudo-Random Linear Frequency Modulation

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Journal of Shanghai Jiaotong university(Science) 2021年第4期26卷 534-542页

作者： tang zhiqiang QUAN Houde SUN Huixian CUI Peizhang China Department of Electronic and Optical Engineering the Army Engineering University of PLAShijiazhuang050003China National Key Laboratory of Science and Technology on Communication University of Electronic Science and Technology of ChinaChengdu611731China

To improve the signal detection performance of binary-sequence frequency hopping communication when the complementary channel is jammed, a binary-sequence frequency hopping communication system based on pseudo-random liner frequency modulation (LFM) is proposed. The transmitting end uses the chirp signal to carry out the in-band spread spectrum of the binary-sequence frequency hopping signal, and then sends it out through the radio frequency front end. At the receiving end, the received signal is dehopped and processed by fractional Fourier transform. The source information is obtained by sampling decision. Firstly, a binary-sequence frequency hopping system model based on pseudo-random LFM is constructed. Secondly, the bit error rate expression of anti-partial band jamming and follower jamming under the Rice channel is derived. The results show that this method has at least 5 dB performance gain than binary sequence frequency hopping for different parameter settings under partial band jamming and follower jamming, and the anti-jamming performance is significantly better than the conventional frequency hopping communication.

关键词： binary-sequence frequency hopping liner frequency modulation(LFM) fractional fourier transform partial band jamming follower jamming

SNP-based QTL mapping for panicle traits in the japonica super rice cultivar Liaoxing 1

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

The Crop Journal 2020年第5期8卷 769-780页

作者： Mingzhu Zhao Zuobin Ma Lili Wang zhiqiang tang Ting Mao Chuanbin Liang Hong Gao Liying Zhang Na He Liang Fu Changhua Wang Guomin Sui Wenjing Zheng Institute of Rice Research Liaoning Academy of Agricultural SciencesShenyang 110000LiaoningChina Institute of Rice Research Shenyang Agricultural UniversityShenyang 110161LiaoningChina Liaoning Province Saline and Alkaline Land Utilization and Research Institute Panjin 124010LiaoningChina

Panicle traits directly associated with yield are a target of selection in rice *** abundant QTL for panicle traits have been identified,there is little information about the genetic basis of panicle traits in japonica super rice(JSR)*** this study,we identified QTL for panicle traits in three environments using a population of recombinant inbred lines(RILs)derived from the JSR cultivar Liaoxing 1.A total of 197 RILs were genotyped with 285 polymorphic SNP *** data and best linear unbiased prediction(BLUP)value of primary branch number(BNP),secondary branch number(BNS),grain number on primary branch(GNP),grain number on secondary branch(GNS),grain number per panicle(GN),panicle length(PL)and grain density(GD)were used for QTL mapping.A total of 105 QTL for seven panicle traits were detected in single environments using their BLUP *** QTL explained 0.51%–52.22%of the phenotypic *** the 105,49 were also detected by joint multi-environment *** stable QTL:qGD9,qPL9,qGNP9,qGN6,and qBNS6.2 were identified in multiple ***9,qGNP9,and qPL9,co-localizing on chromosome 9,likely correspond to the known gene ***,qGN6 and qBNS6.2 in a co-localization region were identified as novel QTL,and their Liaoxing 1 alleles had a positive *** RILs with the QTL allele combinations qGD9/qPL9/qGNP9 and qGN6/qBNS6.2 showed greater *** investigation of the putative gene underlying qGN6/qBNS6.2 would shed light on the molecular mechanism of JSR.

关键词： cultivar panicle effect.

SARS-CoV-2-specific CD4^(+)T cells are associated with long-term persistence of neutralizing antibodies

在线全文

学校读者我要写书评

暂无评论

Signal Transduction and Targeted Therapy 2022年第5期7卷 1773-1782页

作者： Zhongfang Wang Xiaoyun Yang Xinyue Mei Yumin Zhou zhiqiang tang Guichang Li Jiaying Zhong Mengqiu Yu Mingzhu Huang Xiaoling Su Bijia Lin Pengxing Cao Ji Yang Pixin Ran State Key Laboratory of Respiratory Disease&National Clinical Research Center for Respiratory Disease Guangzhou Institute of Respiratory HealthThe First Affiliated Hospital of Guangzhou Medical UniversityGuangzhou Medical UniversityGuangzhouChina The Second People’s Hospital of Changde HunanChina School of mathematics and Statistics University of MelbourneMelbourneVICAustralia

Understanding the decay and maintenance of long-term SARS-CoV-2 neutralizing antibodies in infected or vaccinated people and how vaccines protect against other SARS-CoV-2 variants is critical for assessing public vaccination ***,we measured different plasm antibody levels 2 and 12 months after disease onset,including anti-RBD,anti-N,total neutralizing antibodies,and two neutralizing-antibody *** found that total neutralizing antibodies declined more slowly than total anti-RBD and anti-N IgG.

关键词： antibodies neutral assessing

Analysis of parental genetic diversity and its impact on grain yield and quality of japonica hybrid rice in northern China

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

The Crop Journal 2022年第3期10卷 904-910页

作者： Hong Gao Zuobin Ma Yuanzheng Wang Manli Zhang Xianju Wang Changhua Wang zhiqiang tang Liying Zhang Liang Fu Na He Hui Wang Yongan Yin Yuanjun Bai Guomin Sui Wenjing Zheng Liaoning Rice Research Institute Shenyang 110101LiaoningChina Liaoning Academy of Agricultural Sciences Shenyang 110161LiaoningChina Xinjiang Tianye Group Ltd. Shihezi 832000XinjiangChina

The relationship between parental genetic differences and the quality and yield of japonica hybrid rice strongly influences japonica hybrid rice *** this study,137 parental lines of japonica hybrid rice were genotyped using 8 K rice SNP-Chips to characterize their genetic diversity,population structure,and indica-genotype *** genetic diversity of total parental lines averaged 0.264,with values of0.287 for restorer lines and 0.148 for the sterile *** introduction of indica lineage increased the genetic diversity of restorer lines relative to that of sterile *** model-based population structure analysis,the 137 lines were divided into 14 *** to the grouping results,eight restorer lines and five sterile lines were selected from different groups for cross breeding,yielding 40 japonica hybrid rice combinations(F1).Investigation of the yield and quality of these combinations showed that highyield combinations could be obtained by increasing parental genetic distance to 0.8–0.9,a result accomplished largely by the introduction of indica genomic components of restorer *** further improve grain quality,the genetic distance between parents should be reduced to 0.4–0.5,suggesting an indicagenotype proportion of 30%–40%for restorer *** study may provide a reference for breeding of japonica hybrid rice.

关键词： Japonica hybrid rice Genetic distance Indica-genotype proportion Heterosis

在线全文

学校读者我要写书评

暂无评论

外资税收优惠政策的弊端与调整

涉外税务 2005年第10期 26-27页

作者：汤志强德州学院山东德州253023

外资企业税收优惠政策加大了内资企业的弱势地位,挤占了国内企业的投资机会,客观上限制了国产设备的生产和投资,扭曲了市场行为,内外资企业所得税优惠的巨大差别为企业避税提供了条件,外资企业税收优惠政策必须调整。应清理地方税收优... 详细信息

外资企业税收优惠政策加大了内资企业的弱势地位,挤占了国内企业的投资机会,客观上限制了国产设备的生产和投资,扭曲了市场行为,内外资企业所得税优惠的巨大差别为企业避税提供了条件,外资企业税收优惠政策必须调整。应清理地方税收优惠政策,优惠的模式应向特定优惠型转换,以最终实现内、外资企业税收的统一。

关键词：国外投资税收优惠特定优惠

Technical means and system guarantee of museumprotection and inheritance for intangible cultural heritage

在线全文

学校读者我要写书评

暂无评论

科学教育与博物馆 2015年第1期1卷 66-73页

作者： tang zhiqiang China National Agricultural Museum E-mail: tang1099@***

Intangible cultural heritage has a rich connotation of unique thinking way, ethical imaginationand cultural awareness, which is an important sign of national spiritual culture. Possessing the specialvalues of professionalism, permanency, security and openness, with the advantages museums play acentral role in inheriting and rescuing our intangible cultural heritage. Museums have a lot of technicalmeans for museums to protect and inherit intangible cultural heritage, such as scientific research,preservation of material carrier, museum publications, displays on intangible cultural heritage, estab-lishing thematic museums. In intangible cultural heritage, agricultural heritage is the most importantpart. The core content of which is the ideas and methods of harmony between mankind and environ-ment. There is a variety of practices on the protection by China National Agricultural Museum.

关键词： Museum, Protection Technical, Intangible Cultural Heritage, Agricultural Heritage

在线全文

学校读者我要写书评

暂无评论

入声喉塞尾生理表征的计量分析

中国语文 2019年第6期 709-722,767页

作者：唐志强合肥安徽大学文学院

从成音生理机制看,喉塞尾会加大喉头垂直运动的幅度,幅度大小(喉头垂直运动值)通过EGG原始信号中低频成分的方均根值计算。喉头垂直运动值可表征喉塞尾的生理属性。经计量分析,喉头垂直运动值与调长负相关。初步测算,喉头垂直运动值40.... 详细信息

从成音生理机制看,喉塞尾会加大喉头垂直运动的幅度,幅度大小(喉头垂直运动值)通过EGG原始信号中低频成分的方均根值计算。喉头垂直运动值可表征喉塞尾的生理属性。经计量分析,喉头垂直运动值与调长负相关。初步测算,喉头垂直运动值40.2为江淮官话4方言点(扬州、南京、芜湖、东台)入声喉塞尾脱落的临界参考值。

关键词：江淮官话入声喉塞尾生理表征喉头垂直运动值计量分析