检索结果-南通市图书馆

Dissecting the molecular basis of spike traits by integrating gene regulatory networks and genetic variation in wheat

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Plant Communications 2024年第5期5卷 57-74页

作者： Guo Ai Chao He Siteng Bi Ziru Zhou Ankui Liu Xin Hu Yanyan Liu Liujie Jin JiaCheng Zhou Heping Zhang Dengxiang Du Hao Chen Xin Gong Sulaiman Saeed Handong Su Caixia Lan Wei Chen Qiang Li Hailiang Mao Lin Li Hao Liu Dijun Chen Kerstin Kaufmann Khaled FAlazab Wenhao Yan national Key Laboratory of Crop Genetic Improvement Hubei Hongshan LaboratoryHuazhong Agricultural UniversityWuhan 430070China College of Plant Science and technology Huazhong Agricultural UniversityWuhan 430070China Shenzhen Institute of Nutrition and Health Huazhong Agricultural UniversityWuhan 430070China Shenzhen Branch Guangdong Laboratory for Lingnan Modern AgricultureGenomeAnalysis Laboratory of the Ministry of AgricultureAgricultural Genomics Institute at ShenzhenChinese Academy of Agricultural SciencesShenzhen 518120China State Key Laboratory of Pharmaceutical Biotechnology School of Life SciencesNanjing UniversityNanjing 210023China Department for Plant Cell and Molecular Biology Institute for BiologyHumboldt-Universitat Zu Berlin10115 BerlinGermany Plant Research Department Nuclear Research CenterEgyptian Atomic Energy AuthorityCairo 13759Egypt

Spike architecture inﬂuences both grain weight and grain number per spike,which are the two major components of grain yield in bread wheat(Triticum aestivum L.).However,the complex wheat genome and the inﬂuence of various environmental factors pose challenges in mapping the causal genes that affect spike ***,we systematically identified genes involved in spike trait formation by integrating information on genomic variation and gene regulatory networks controlling young spike development in *** identified 170 loci that are responsible for variations in spike length,spikelet number per spike,and grain number per spike through genome-wide association study and meta-QTL *** constructed gene regulatory networks for young inﬂorescences at the double ridge stage and theﬂoret primordium stage,in which the spikelet meristem and theﬂoret meristem are predominant,respec-tively,by integrating transcriptome,histone modification,chromatin accessibility,eQTL,and protein–pro-tein interactome *** these networks,we identified 169 hub genes located in 76 of the 170 QTL regions whose polymorphisms are significantly associated with variation in spike *** functions of TaZF-B1,VRT-B2,and TaSPL15-A/D in establishment of wheat spike architecture were *** study provides valuable molecular resources for understanding spike traits and demonstrates that combining genetic analysis and developmental regulatory networks is a robust approach for dissection of complex traits.

关键词： bread wheat spike traits genetic variation protein–protein interaction gene regulatory network

Tempospacial energy-saving effect-based diagnosis in large coal-fired power units:Energy-saving benchmark state

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Science China(Technological Sciences) 2015年第12期58卷 2025-2037页

作者： FU Peng WANG NingLing YANG Yong Ping XU Han LI XiaoEn ZHANG YuMeng national Thermal Power Engineering and technology Research center North China Electric Power University

The energy-saving analytics of coal-fired power units in China is confronting new challenges especially with even more complicated system structure, higher working medium parameters, time-dependent varying operation conditions and boundaries such as load rate, coal quality, ambient temperature and humidity. Compared with the traditional optimization of specific operating parameters, the idea of the energy-consumption benchmark state was proposed. The equivalent specific fuel consumption(ESFC) analytics was introduced to determine the energy-consumption benchmark state, with the minimum ESFC under varying operation boundaries. Models for the energy-consumption benchmark state were established, and the endogenous additional specific consumption(ASFC) and exogenous ASFC were calculated. By comparing the benchmark state with the actual state, the energy-saving tempospacial effect can be quantified. As a case study, the energy consumption model of a 1000 MW ultra supercritical power unit was built. The results show that system energy consumption can be mainly reduced by improving the performance of turbine subsystem. This nearly doubles the resultant by improving the boiler system. The energy saving effect of each component increases with the decrease of load and has a greater influence under a lower load rate. The heat and mass transfer process takes priority in energy saving diagnosis of related components and processes. This makes great reference for the design and operation optimization of coal-fired power units.

关键词： energy-saving diagnosis coal-fired power generation unit specific fuel consumption exergy thermodynamics

维普期刊数据库

Reappraisal of Asian Summer Monsoon Indices and the Long-Term Variation of Monsoon

在线全文

学校读者我要写书评

暂无评论

Journal of Meteorological Research 2007年第2期21卷 168-178页

作者：陈桦丁一汇何金海 Nanjing University of Information Science and technology national Climate center

The Webster and Yang monsoon index (WYI)-the zonal wind shear between 850 and 200 hPa was calculated and modified on the basis of NCEP/NCAR reanalysis data. After analyzing the circulation and divergence fields of 150-100 and 200 hPa, however, we found that the 200-hPa level could not reflect the real change of the upper-tropospheric circulation of Asian summer monsoon, especially the characteristics and variation of the tropical easterly jet which is the most important feature of the upper-tropospheric circulation. The zonal wind shear U850-U(150+100) is much larger than U850-U200, and thus it can reflect the strength of monsoon more appropriately. In addition, divergence is the largest at 150 hPa rather than 200 hPa, so 150 hPa in the upper-troposphere can reflect the coupling of the monsoon system. Therefore, WYI is redefined as DHI, i.e., IDH=U850* - U(150+100)*, which is able to characterize the variability of not only the intensity of the center of zonal wind shear in Asia, but also the monsoon system in the upper and lower troposphere. DHI is superior to WYI in featuring the long-term variation of Asian summer monsoon as it indicates there is obvious interdecadal variation in the Asian summer monsoon and the climate abrupt change occurred in 1980. The Asian summer monsoon was stronger before 1980 and it weakened after then due to the weakening of the easterly in the layer of 150-100 hPa, while easterly at 200 hPa did not weaken significantly. After the climate jump year in general, easterly in the upper troposphere weakened in Asia, indicating the weakening of summer monsoon; the land-sea pressure difference and thermal difference reduced, resulting in the weakening of monsoon; the corresponding upper divergence as well as the water vapor transport decreased in Indian Peninsula, central Indo-China Peninsula, North China, and Northeast China, indicating the weakening of summer monsoon as well. The difference between NCEP/NCAR and ERA-40 reanalysis data in stud

关键词： monsoon indices interannual and interdecadal variation climate abrupt change

Research on Key Technologies of Network Security Situational Awareness for Attack Tracking Prediction

在线全文

同方期刊数据库

学校读者我要写书评

暂无评论

Chinese Journal of Electronics 2019年第1期28卷 162-171页

作者： KOU Guang WANG Shuo TANG Guangming Artificial Intelligence Research center National Innovation Institute of Defense Technology Information Engineering University

This paper analyzed the existing network security situation evaluation methods and discovered that they cannot accurately reflect the features of large-scale,synergetic, multi-stage gradually shown by network attack behaviors. For this purpose, the association between attack intention and network configuration information was deep analyzed. Then a network security situation evaluation method based on attack intention recognition was proposed. Unlike traditional method, the evaluation method was based on intruder. This method firstly made causal analysis of attack event and discovered and simplified intrusion path to recognize every attack phases, then realized situation evaluation based on the attack phases. Lastly attack intention was recognized and next attack phase was forecasted based on achieved attack phases, combined with vulnerability and network connectivity. A simulation experiments for the proposed network security situation evaluation model is performed by network examples. The experimental results show that this method is more accurate on reflecting the truth of attack. And the method does not need training on the historical sequence, so the method is more effective on situation forecasting.

关键词： Multi-stage attack Situation evaluation Network security Intention recognition Causal analysis

A comparative study on corrosion kinetic parameter estimation methods for the early stage corrosion of Q345B steel in 3.5wt% NaCl solution

在线全文

同方期刊数据库

学校读者我要写书评

暂无评论

矿物冶金与材料学报：英文版 2017年第10期24卷 1112-1124页

作者： Shuang-yu Cai Lei Wen Ying Jin national center for Materials Service Safety University of Science and Technology Beijing Beijing 100083 China

Corrosion kinetic parameters play an important role in researchers' ability to understand and predict corrosion behavior. The corrosion kinetic parameters of structural steel Q345B specimens immersed in 3.5wt% NaCl solution for 1–2 h were determined using linear polarization resistance(LPR), Tafel-curve multiparameter fitting, electrochemical impedance spectroscopy(EIS), and electrochemical frequency modulation(EFM) methods. The advantages and disadvantages of each method were investigated and discussed through comparative investigation. Meanwhile, the average corrosion rate was examined using traditional coupon tests. The results showed that the corrosion current density values estimated by EFM at a base frequency of 0.001 Hz and those obtained by Tafel-curve four-parameter fitting(TC4) are similar and consistent with the results of coupon tests. Because of their slight perturbation of the corrosion system, EIS and EFM/TC4 in collaborative application are the recommended techniques for determining the kinetics and the corresponding parameters for the homogeneous corrosion of the naked metal. In our study of the electrochemical kinetics, we obtained much more abundant and accurate electrochemical kinetic parameters through the combined use of different electrochemical methods.

关键词： structural steel corrosion kinetics Tafel curve electrochemical impedance spectroscopy

维普期刊数据库

Self-fertilization in a gonochoristic fish yellow catfish

在线全文

学校读者我要写书评

暂无评论

Aquaculture and Fisheries 2024年第2期9卷 234-244页

作者： Yue Yu Ziyi Lu Min Chen Ya Liu Yang Ding Chenhao Hu Zhigang Shen College of Fisheries Key Lab of Freshwater Animal BreedingMinistry of Agriculture and Rural AffairsWuhan430070China Key Lab of Agricultural Animal Genetics Breeding and Reproduction of Ministry of EducationWuhan430070China Engineering technology Research center for Fish Breeding and Culture in Hubei Province Wuhan430070China Engineering Research center of Green Development for Conventional Aquatic Biological Industry in the Yangtze River Economic Belt of Ministry of Education Huazhong Agricultural UniversityWuhan430070China Hubei Huangyouyuan Fishery Development Limited Company Wuhan430070China

Sex control techniques are in great demand for aquaculture because of the huge benefits of mono-sex *** a previous study on yellow catfish(Tachysurus fulvidraco),intersex individuals were produced by administrating 17α-methyltestosterone(MT)or aromatase inhibitor letrozole(LZ).The ovarian and testicular portions of intersexual gonads developed well and were completely separated,arousing our interest in producing self-fertilizable fish and clone-like fish *** this study,yellow catfish fry were treated with a combination of MT and LZ at a low dose(5 mg kg^(-1)MT,300 mg kg^(-1)LZ)at a low water temperature(27.0℃,mixed sex-producing temperature,LL group)and a high temperature(33.5◦C,male-producing temperature,HL group),and with a high dose(10 mg kg^(-1) MT,600 mg kg^(-1) LZ)at a low water temperature(LH group),during 12-65 days post-hatching,the critical period of sex *** XX and XY intersex were produced with different percentages at the same time through co-treatment with MT and LZ,with or without the help of male-producing *** highest percentage of XY intersex(53%in XY,36%in XX and XY)and XX intersex(47%in XX,25%in XX and XY)was produced in LH and HL groups,*** of gonadal morphology,histology,and sperm dynamic analysis indicate that some XX and XY intersex individuals were capable of self-fertilization through artificial *** reproductive performance of these intersex individuals was then investigated by injecting spawning agents,dissecting gonads,and artificially fertilizing eggs with their own *** XX,XY,and YY genotypic individuals were produced by the self-fertilization of XY intersex *** present study successfully produced high percentages of XX and XY intersex and conducted self-fertilization by mating the eggs and sperm of a single intersex ***-fertilization in fish will show great potential in aquaculture genetics and breeding,for example,generating high

关键词： Sex differentiation Self-fertilization Sex reversal Mono-sex Clone

A hybrid multiple copy routing algorithm in space delay-tolerant networks

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Science China(Information Sciences) 2017年第4期60卷 124-134页

作者： Peng WAN Shi CHEN Tao YU Zhongjie HUA Beijing Institute of Tracking and Telecommunications technology national Space Science center Chinese Academy of Sciences

With the development of technology and applications in space delay-tolerant networks(SDTNs), increasing attention has been paid on the routing technologies between different DTN nodes. This paper proposes a novel hybrid multiple copy routing(HMCR) algorithm that can be applied not only to deterministic space scenarios but also to opportunistic space scenarios. HMCR combines contact graph and delivery probability metrics to make forwarding decisions. In order to verify the new HMCR algorithm’s performance, research work has been carried out to prove its availability in SDTNs. The analysis and simulation results show that, compared with other algorithms such as contact graph routing(CGR), Epidemic, and PRo PHET, the new HMCR algorithm performs well in the areas of message delivery ratios, average end-to-end delays, and transmission overhead, which proves to be suitable for highly dynamic SDTNs.

关键词： space delay-tolerant networks routing algorithms contact graph routing hybrid single copy rout ing hybrid multiple copy routing

Study on micro-texture and skid resistance of aggregate during polishing

在线全文

同方期刊数据库

学校读者我要写书评

暂无评论

Frontiers of Structural and Civil Engineering 2017年第3期11卷 346-352页

作者： Zhenyu QIAN Lingjian MENG national center for Material Service Safety University of Science and Technology Beijing Beijing 100083 China

The skid resistance performance of pavement is closely related to the micro-texture of pavement aggregate, while there is very few research on the relationship between micro-texture and the skid resistance. In this paper, the optical microscope is used to acquire the surface morphology of three types of aggregates including basalt, limestone and red sandstone respectively, where a total of 12 indicators are developed based on the surface texture information. The polishing effect on aggregate is simulated by Wehner/Schulze （W/S） device, during the polishing procedure, the skid resistance are measured by British Pendulum Tester （BPT）. Based on the results of independent T-test and the polishing resistance analysis, it shows that the surface texture of basalt is significantly different between limestone and red sandstone. Three indicators including the average roughness （Ra）, the kurtosis of the surface （Sku） and the mean summit curvature （Ssc） are selected to describe the characteristics of aggregate micro-texture based on the correlation analysis. The contribution of micro-texture to the skid resistance can be described with the secondary polynomial regression model by these indicators.

关键词： skid resistance of pavement micro-texture aggregates polishing test

Micro-alkaline environment enables CO2 electroreduction to multicarbons

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

national Science Review 2023年第1期10卷 105-107页

作者： Li Li Yong-Fu Sun Yi Xie Hefei national Research center for Physical Sciences at Microscale University of Science and Technology of China

CO2electroreduction （CO2RR） technology is recognized as a promising option toward the carbon-neutral target set in the Paris Agreement,which enables the upgrade of greenhouse CO2to chemical ***,multicarbon products (C2+) with higher values are more desired species but are difficult to produce [1].The development of a successful CO2-to-multicarbons conversion system requires addressing the favorable reactive environment.

关键词：