|
|
|
题名
|
作者
|
年代
|
出处
|
被引量
|
| 1 | Determination of thermal expansion coefficients for unidirectional fiber-reinforced composites显示文摘In the present work, the coefficients of thermal expansion(CTEs) of unidirectional(UD)fiber-reinforced composites are studied. First, an attempt is made to propose a model to predict both longitudinal and transverse CTEs of UD composites by means of thermo-elastic mechanics analysis. The proposed model is supposed to be a concentric cylinder with a transversely isotropic fiber embedded in an isotropic matrix, and it is subjected to a uniform temperature change. Then a concise and explicit formula is offered for each CTE. Finally, some finite element(FE) models are created by a finite element program MSC. Patran according to different material systems and fiber volume fractions. In addition, the available experimental data and results of other analytical solutions of CTEs are presented. Comparisons are made among the results of the cylinder model,the finite element method(FEM), experiments, and other solutions, which show that the predicted CTEs by the new model are in good agreement with the experimental data. In particular, transverse CTEs generally offer better agreements than those predicted by most of other solutions. | Ran Zhiguo Yan Ying Li Jianfeng Qi Zhongxing Yang Lei | 2014 | Chinese Journal of Aeronautics2014，27，5： | 5 |
| 2 | High-speed visual target tracking with mixed rotation invariant description and skipping searching显示文摘This paper proposes a novel high-speed visual target tracking system based on mixed rotation invariant description(MRID) and skipping searching method. MRID is a novel rotation invariant description of texture and edge information by annular histograms and dominant direction. It overcomes rotation variant and large computation issues in conventional LBP-HOG feature description. The skipping searching method used in tracking can remarkably decrease the computation time by avoiding repeated searching operations.The proposed tracking system contains an image sensor, a hierarchical vision processor and an actuator with2 dimensions of freedom(DOF). The vision processor integrates processors with pixel-and row-level parallelism to speed up the tracking algorithm. Experiment results show that the proposed system can achieve over 1000-fps processing speed of the tracking algorithm under 750 × 480 resolution image. | Yongxing YANG Jie YANG Zhongxing ZHANG Liyuan LIU Nanjian WU | 2017 | Science China(Information Sciences)2017，60，6： | 5 |
| 3 | Effect of Initial Microstructure on Warm Deformation Behavior of 45 Steel显示文摘In order to investigate the effect of initial microstructure on warm deformation behavior, some specimens of 45 steel were annealed and some quenched. Then the specimens were isothermally compressed on a Gleeble 3500 machine. The deformation temperature range was 550 to 700 ℃ and the strain rate range was 0.001 to 0.1 s-1. An optical microscope (OM) and a transmission electron microscope (TEM) were used to study the microstructures. The results show that the microstructure of annealed specimens is ferrite and pearlite and that of quenched specimens is martensite. The flow stress of quenched specimens is higher than that of annealed ones at 550 ℃ when strain rates are greater than 0.001 s-1. However, at 600 to 700 ℃ and strain rate of 0.001 s-1, the whole flow curves of quenched specimens are below that of annealed ones. Under the rest conditions, the flow stress of quenched specimens is higher at the beginning of compression and then the opposite is true after the strain is greater than a critical value. The microstructure examination proves that the tempering and dynamic recrystallization easily occur in the specimens with martensite during warm compression, which results in the above phenomena. | ZHAO Xin1, YANG Xiao-ling2, JING Tian-fu3 (1. The Sixth Department, Zhengzhou Institute of Aeronautics, Zhengzhou 450015, Henan, China 2. Zhengzhou Zhongxing Basic Constructions Development Co Ltd, Zhengzhou 450015, Henan, China 3. State Key Laboratory of Metastable Materials Science and Technology, Qinhuangdao 066004, Hebei, China) | 2012 | Journal of Iron and Steel Research(International)2012，19，8： | 3 |
| 4 | First report of microcystin production in Microcystis smithii Komrek and Anagnostidis(Cyanobacteria) from a water bloom in Eastern China显示文摘A water bloom sample collected from Lake Dishui in Shanghai was characterized.The morphological identification showed that Micorcystis wesenbergii and Micorcystis smithii were the main component of the bloom.Five strains of M.smithii were successfully isolated.Their 16S rRNA gene sequences based phylogenetic tree showed that the five strains of M.smithii intermixed with strains of other morphospecies in Microcystis.A fragment of mcy gene encoding for microcystin synthetase was detected in one of the five M.smithii strains(CHAB 2183),indicating its potential of microcystin production.High performance liquid chromatography analysis confirmed M.smithii CHAB 2183 to produce microcystin-RR as 1550 μg per gram dry weight cells.The present investigation,for the first time,reported the isolated strains of M.smithii and microcystin production from M.smithii. | Yang Liu Wenhua Tan Xingqiang Wu Zhongxing Wu Gongliang Yu Renhui Li | 2011 | Journal of Environmental Sciences2011，23，1： | 2 |
| 5 | Linking key intervention timings to rapid declining effective reproduction number to quantify lessons against COVID-19显示文摘Coronavirus disease 2019(COVID-19)is currently under a global pandemic trend.The efficiency of containment measures and epidemic tendency of typical countries should be assessed.In this study,the efficiency of prevention and control measures in China,Italy,Iran,South Korea,and Japan was assessed,and the COVID-19 epidemic tendency among these countries was compared.Results showed that the effective reproduction number(Re)in Wuhan,China increased almost exponentially,reaching a maximum of 3.98 before a lockdown and rapidly decreased to below 1 due to containment and mitigation strategies of the Chinese government.The Re in Italy declined at a slower pace than that in China after the implementation of prevention and control measures.The Re in Iran showed a certain decline after the establishment of a national epidemic control command,and an evident stationary phase occurred because the best window period for the prevention and control of the epidemic was missed.The epidemic in Japan and South Korea reoccurred several times with the Re fluctuating greatly.The epidemic has hardly rebounded in China due to the implementation of prevention and control strategies and the effective enforcement of policies.Other countries suffering from the epidemic could learn from the Chinese experience in containing COVID-19. | Zhihang Peng Wenyu Song Zhongxing Ding Quanquan Guan Xu Yang Qiaoqiao Xu Xu Wang Yankai Xia | 2020 | Frontiers of Medicine2020，14，5： | 2 |
| 6 | Influence of Technologic Advances on Outcomes in Patients With Unresectable, Locally Advanced Non–Small-Cell Lung Cancer Receiving Concomitant Chemoradiotherapy显示文摘 | Zhongxing X. Liao Ritsuko R. Komaki Howard D. Thames Helen H. Liu Susan L. Tucker Radhe Mohan Mary K. Martel Xiong Wei Kunyu Yang Edward S. Kim George Blumenschein Waun Ki Hong James D. Cox | 2010 | International Journal of Radiation Oncology Biology Physics2010，，3： | 1 |
| 7 | Influence of Technologic Advances on Outcomes in Patients With Unresectable, Locally Advanced Non–Small-Cell Lung Cancer Receiving Concomitant Chemoradiotherapy显示文摘 | Zhongxing X. Liao Ritsuko R. Komaki Howard D. Thames Helen H. Liu Susan L. Tucker Radhe Mohan Mary K. Martel Xiong Wei Kunyu Yang Edward S. Kim George Blumenschein Waun Ki Hong James D. Cox | 2010 | International Journal of Radiation Oncology, Biology, Physics2010，，3： | 1 |
| 8 | cpcBA-IGS as an effective marker to characterize Microcystis wesenber- gii (Komarek) Komarek in Kondrateva (cyanobacteria) 显示文摘 | Tan Wenhua Liu Yang Wu Zhongxing | 2010 | Harmful Algae2010，9，6： | 1 |
| 9 | Overview of the distribution and adaptation of a bloom-forming cyanobacterium Raphidiopsis raciborskii:integrating genomics,toxicity,and ecophysiology显示文摘Raphidiopsis raciborskii is a notorious bloom-forming and filamentous cyanobacterium that has been extensively investigated into its toxicity,phylogeny,and spreading potential.Studies have demonstrated that this species has spanned different climates from tropical zones to temperate regions,suggesting that R.raciborskii is becoming a cosmopolitan species in freshwater systems around the world.In fact,it has been proposed that several characteristics of R.raciborskii may explain its spread and dominance.In particular,R.raciborskii is known to display a high extent of physiological plasticity regarding nutrients,light regimes,and te mperature s.Moreover,this species illustrates different ecotype s with distinct environmental requirements.Here,we present an overview of R.raciborskii’s global distribution and adaptation strategy based on the recent findings from genome variance,toxicity,and ecophysiology.The expansion of its geographical distribution can be linked to its genome,toxicity,and ecophysiology.The variable genes are mainly associated with the stress response,phage defense,DNA repair,cell cycle control,and membrane transport,illustrating the species’adaptability in response to changing environments.In fact,the species shows rapid adaptability to low and/or variable nutrient availability,especially changing phosphorus availability.Moreover,the variabilities of strains within the population extend their flexibility to adapt and acclimate to ambient environment.In addition,cylindrospermopsins(CYN)appear to have a potential biological role in facilitating theirs dominance or bloom.These strategies of R.raciborskii make it a challenge to manage in a fre shwater system,reflecting the management of its bloom from further evidence of the complex ecophysiology,toxicity,and genome of this species. | Zhongxing WU Songqi YANG Junqiong SHI | 2022 | Journal of Oceanology and Limnology2022，40，5： | 1 |
| 10 | Associations between Single-Nucleotide Polymorphisms in the PI3K–PTEN–AKT–mTOR Pathway and Increased Risk of Brain Metastasis in Patients with Non–Small Cell Lung Cancer显示文摘 | Qianxia Li Ju Yang Qianqian Yu Huanlei Wu Bo Liu Huihua Xiong Guangyuan Hu Jing Zhao Xianglin Yuan Zhongxing Liao | 2013 | Clinical Cancer Research2013，，22： | 1 |
| 11 | 'Green Drilling Rigs'Lead New Trends in the Traditional Energy Equipment Market显示文摘Recently,the 1500HP hybrid drilling rigs exported by China Petroleum Technology and Development Corporation(CPTDC)successfully commenced drilling in Abu Dhabi,United Arab Emirates(UAE).The Abu Dhabi Hybrid Drilling Rig Project,commemorating the 10th anniversary of China’s'Belt and Road'initiative,symbolizes CPTDC’s dedication to practical cooperation and sustainable development.It serves as a pioneering endeavor in global carbon emission reduction,aiming to elevate the developmental standards and improve the well-being of participating countries.This project propels the green and low-carbon transformation of China’s energy equipment sector,fostering its advancement into the international high-end market,thereby enhancing the prestige of the'Made in China'brand with positive contributions. | Cheng Wenping Wang Guangzhong Zhang Lei Yang Zhongxing Wen Liangfan Xu Xinxin Deng Shen | 2023 | China Oil & Gas2023，30，6： | 0 |
| 12 | Genome-wide association study (GWAS) of leaf wax components of apple显示文摘The wax layer of apple leaves plays an important role in improving stress resistance,but relatively little is known about the mechanisms of wax synthesis and transport in apple leaves.In this study,17 wax components,including alcohols,alkanes,fatty acids and terpenes,were analyzed by gas chromatography-tandem mass spectrometry(GCMS)from the leaves of 123 apple germplasms.Whole-genome sequencing of these apple accessions yielded 5.9 million high-quality single nucleotide polymorphisms(SNPs).We performed a genome-wide association study(GWAS)on 17 wax components and identified several genes related to wax synthesis and transport,including MdSHN1(SHINE1),MdLTP4(LIPID TRANSFER PROTEIN4),MdWSD1(WAX ESTER SYNTHASE/ACYL-COA DIAC-YLGLYCEROL ACYLTRANSFERASE1),MdRDR1(RNA-DEPENDENT RNA POLYMERASE1),MdACBP6(ACYL-COA-BINDING PROTEIN6),MdNLE(NOTCHLESS)and MdABCG21(ATP-BINDING CASSETTE G21).Moreover,we identified some prominent SNPs that may affect gene expression and protein function.These results provide insights into mechanisms of wax synthesis and transport in apple leaves and broaden the genetic resources and basis for facilitating resistance breeding. | Fuguo Cao Zhongxing Li Lijuan Jiang Chen Liu Qian Qian Feng Yang Fengwang Ma Qingmei Guan | 2021 | Stress Biology2021，1，1： | 0 |
| 13 | Environmental heterogeneity and productivity drive the assemblage of benthic diatom:a case study of the Three Gorges Reservoir显示文摘Dam construction has a critical effect on river ecosystems in the world,resulting in a rapid decline in biodiversity and ecosystem health.However,the effect of dam construction on the assemblage pattern of benthic diatoms remains unclear.The benthic diatoms assemblages in the tributary backwater area of the Three Gorges Reservoir(TGR)were investigated under low water level(LWL)and high water level(HWL)conditions.Results show that Discostella stelligera,Nitzschia palea,and Craticula subminuscula were dominant species in LWL,while Achnanthidium minutissimum and Nitzschia dissipata were dominant in HWL.Furthermore,environmental variables,productivity parameters,diversity indices,and community similarity were found significantly different between LWL and HWL periods.The Mantel test indicated that both environmental and spatial factors had significant effects on diatom communities in backwater area,while productivity was also a key driving force in LWL.The variation partitioning analysis(VPA)further demonstrated that environment factors could explain the largest variance of diatom assemblages in HWL(9%)and LWL(11%),followed by spatial factors.The relative importance of productivity to diatom community was significantly enhanced in LWL,but only a slight effect was found in HWL.These results indicate that the diatom assemblages were shaped by both environmental filtering and spatial factors.The relative importance of spatial factors depended on the degree of productivity.Therefore,the homogenization of diatom communities due to environmental disturbance,e.g.eutrophication and dam building,is the underlying mechanism in assembling the benthic diatoms. | Songqi YANG Tian OUYANG Shaojun XU Lu ZHAO Lulu JI Junqiong SHI Zhongxing WU | 2023 | Journal of Oceanology and Limnology2023，41，3： | 0 |
| 14 | Physiological and molecular responses of invasive cyanobacterium Raphidiopsis raciborskii to ambient phosphorus deficiency显示文摘Raphidiopsis raciborskii can cause harmful cyanobacterial blooms when concentrations of environme ntal pho sphorus(P)are very low,thus the physiological and molecular mechanisms involved in the acclimation to P need to be characterized better.The growth,chlorophyll fluorescence,alkaline phosphatase,and expression of genes directly involved in P assimilation were compared in the R.raciborskii FACHB1496 strain grown with and without inorganic P.The specific growth rate(μ),Chl a,and six fluorescence parameters(minimal fluorescence(F),maximal fluorescence(F),maximal variable fluorescence(F),electron transport flux(further than QA)per RC(ET/RC),quantum yield of the electron transport in PSⅡ(?),and the probability that an electron from a trapped exciton is moved into the electron transport chain beyond Q~-(Ψ))markedly decreased in R.raciborskii in response to experimental P-deficiency.In contrast,the relative variable fluorescence at the J-step(V),trapped energy flux(leading to QA reduction)per RC(TR/RC),and alkaline phosphatase activity significantly increased.In addition,gene expressions involved in the alkaline phosphatase(phoAl and phoA2),high-affinity inorganic P transporter(pstSl),phosphonate transporter and metabolism(phnD and phnM),and nucleotidase(nucH)were significantly upregulated under P deficiency.However,physiological and molecular responses were resumed rapidly after P re-supplementation following P-deficient conditions.Our results highlight that R.raciborskii can perform coordinated and complex cellular and physiological responses to cope with P deficiency,reflecting R.raciborskii’s multi-faceted machinery to respond to environmental P fluctuations. | Junqiong SHI Shuhan HE Lu ZHAO Lulu JI Songqi YANG Zhongxing WU | 2022 | Journal of Oceanology and Limnology2022，40，5： | 0 |
| 15 | EFFECT OF ALUMINIUM AND BORON ON SURFACE MODIFICATION OF SOME MATERIALS显示文摘EFFECTOFALUMINIUMANDBORONONSURFACEMODIFICATIONOFSOMEMATERIALSDai;ZhongxingYang;Zixia(MechanicalEngineeringDepartment,Xiangtan... | Dai Zhongxing Yang Zixia(Mechanical Engineering Department, Xiangtan University, Xiangtan 411105) | 1995 | 中国有色金属学会会刊:英文版1995，5，1： | 0 |
您所在的机构暂未开通此部分的功能，请联系管理员