检索结果-南通市图书馆

Jackson-type inequalities on high-dimensional spheres

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 Mathematics 2024年第11期67卷 2571-2586页

作者： Yeli niu Feng Dai Department of Mathematics Shanghai Normal University Department of Mathematical and Statistical Sciences University of Alberta

We study Jackson's inequality on high-dimensional spheres with respect to the modulus of smoothness defined via the rotation *** obtain a version of Jackson's inequality with a dimensionfree constant,extending Newman and Shapiro's well-known results in 1964 from the case of r = 1 and p = ∞ to more general *** results partially overcome the curse of *** also establish similar results on the equivalence of the K-functional and modulus of smoothness.

关键词： modulus of smoothness $K$-functional Jackson's inequality high-dimensional approximation

Engineering disease-resistant plants with alternative translation efficiency by switching uORF types through CRISPR

在线全文

同方期刊数据库

学校读者我要写书评

暂无评论

Science China(Life Sciences) 2024年第8期67卷 1715-1726页

作者： Jingjing Tian Zhijuan Tang Ruixia niu Yulu Zhou Dan Yang Dan Chen ming Luo Rui Mou Meng Yuan Guoyong Xu National Key Laboratory of Crop Genetic Improvement National Centre of Plant Gene Research(Wuhan)Huazhong Agricultural UniversityWuhan 430070China State Key Laboratory of Hybrid Rice Institute for Advanced Studies(IAS)Wuhan UniversityWuhan 430072China Hubei Hongshan Laboratory Wuhan 430070China

Engineering disease-resistant plants can be a powerful solution to the issue of food ***,it requires addressing two fundamental questions:what genes to express and how to control their *** find a solution,we screen CRISPR-edited upstream open reading frame(uORF)variants in rice,aiming to optimize translational control of disease-related *** switching uORF types of the 5′-leader from Arabidopsis TBF1,we modulate the ribosome accessibility to the downstream firefly *** assume that by switching uORF types using CRISPR,we could generate uORF variants with alternative translation efficiency(CRISPR-aTrE-uORF).These variants,capable of boosting translation for resistance-associated genes and dampening it for susceptible ones,can help pinpoint previously unidentified genes with optimal expression *** test the assumption,we screened edited uORF variants and found that enhanced translational suppression of the plastic glutamine synthetase 2 can provide broad-spectrum disease resistance in rice with minimal fitness *** strategy,which involves modifying uORFs from none to some,or from some to none or different ones,demonstrates how translational agriculture can speed up the development of disease-resistant *** is vital for tackling the food security challenges we face due to growing populations and changing climates.

关键词： disease-resistant plants broad-spectrum disease resistance uORF uORF types uORF variants CRISPR

Associations of genome-wide structural variations with phenotypic differences in cross-bred Eurasian pigs

在线全文

学校读者我要写书评

暂无评论

Journal of Animal Science and Biotechnology 2024年第1期15卷 68-87页

作者： Wencheng Zong Jinbu Wang Runze Zhao Naiqi niu Yanfang Su Ziping Hu xin Liu xinhua Hou Ligang Wang Lixian Wang Longchao Zhang State Key Laboratory of Animal Biotech Breeding Institute of Animal SciencesChinese Academy of Agricultural SciencesBeijing 100193China College of Animal Science Shanxi Agricultural UniversityJinzhong 030801China College of Animal Science and Technology Qingdao Agricultural UniversityQingdao 266109China

Background During approximately 10,000 years of domestication and selection,a large number of structural variations(SVs)have emerged in the genome of pig breeds,profoundly influencing their phenotypes and the ability to adapt to the local ***(≥50 bp)are widely distributed in the genome,mainly in the form of insertion(INS),mobile element insertion(MEI),deletion(DEL),duplication(DUP),inversion(INV),and translocation(TRA).While studies have investigated the SVs in pig genomes,genome-wide association studies(GWAS)-based on SVs have been rarely *** Here,we obtained a high-quality SV map containing 123,151 SVs from 15 Large White and 15 Min pigs through integrating the power of several SV tools,with 53.95%of the SVs being reported for the first *** high-quality SVs were used to recover the population genetic structure,confirming the accuracy of *** functional SV loci were then identified based on positional effects and breed ***,GWAS were performed for 36 traits by genotyping the screened potential causal loci in the F2 population according to their corresponding genomic *** identified a large number of loci involved in 8 carcass traits and 6 skeletal traits on chromosome 7,with FKBP5 containing the most significant SV locus for almost all *** addition,we found several significant loci in intramuscular fat,abdominal circumference,heart weight,and liver weight,*** We constructed a high-quality SV map using high-coverage sequencing data and then analyzed them by performing GWAS for 25 carcass traits,7 skeletal traits,and 4 meat quality traits to determine that SVs may affect body size between European and Chinese pig breeds.

关键词： Body size GWAS Pig Skeleton Structural variations

Event-triggered sliding mode control of linear repetitive processes and its application in metal rolling process

在线全文

学校读者我要写书评

暂无评论

Science China(Information Sciences) 2024年第3期67卷 167-181页

作者： xinyu LV Yugang niu James LAM Key Laboratory of Smart Manufacturing in Energy Chemical Process (East China University of Science and Technology) Ministry of Education Department of Mechanical Engineering The University of Hong Kong

This paper investigates the design problem of a sliding mode controller for linear repetitive processes(LRPs) with a finite pass length on each pass. Under limited communication resources, an eventtriggered mechanism is implemented from the sensors to the controller, whose triggered sequence is consistent with the evolution direction of LRPs. To periodically orchestrate communication between the controller and actuator, a round-robin scheduling mechanism is established based on the pass length. A sliding function involving the state and pass profile is constructed, and the sliding mode controller is designed using triggered states and pass profile signals. Feasible controller gains are attained to ensure the stability of the resultant closed-loop system. Finally, the proposed strategy is implemented for a multi-roll metal rolling process.

关键词： event-triggered mechanism linear repetitive processes metal rolling process round-robin scheduling sliding mode control

同方期刊数据库

Effect of La on the Corrosion Behavior and Mechanism of 3Ni Weathering Steel in a Simulated Marine Atmospheric Environment

在线全文

学校读者我要写书评

暂无评论

Acta Metallurgica Sinica(English Letters) 2024年第2期37卷 308-324页

作者： Gang niu Rui Yuan R.D.K.Misra Na Gong Zhi-Hui Zhang Hao-Xiu Chen Hui-Bin Wu Cheng-Jia Shang xin-Ping Mao Collaborative Innovation Center of Steel Technology University of Science and Technology BeijingBeijing100083China Laboratory for Excellence in Advanced Steel Research Department of MetallurgicalMaterials and Biomedical EngineeringUniversity of Texas at El PasoEl PasoTX79968USA Institute of Materials Research and Engineering Agency for ScienceTechnologyand ResearchSingapore138634Singapore Department of Materials Science and Engineering University of TorontoTorontoONM5S 3E4Canada

The corrosion behavior and mechanism of 3Ni weathering steel in a simulated oceanic atmospheric environment are investigated in order to comprehend the impacts of La,as determined through electrochemical analysis and rust layer *** results of this study demonstrate that the addition of La enhances the corrosion resistance of 3Ni weathering steel in the marine atmospheric environment,thereby reducing the corrosion rate and improving the protection of the rust *** influence of La on corrosion resistance can be attributed to two primary ***,La functions as a grain refiner,minimizing the potential difference of the micro-regions on the substrate surface,thereby significantly reducing the corrosion of bare steel in the marine ***,La inhibits the process of Fe_(3)O_(4) oxidation back toγ-FeOOH during corrosion at the local site,thus decreasing the formation ofγ-FeOOH and enhancing the charge transfer *** research work may serve as a reference for expanding the application of rare earth elements in the field of weathering steel.

关键词： Weathering steel Rare earth Rust layer Corrosion behavior Corrosion resistance

Bilayer solid-electrolyte interphase structure enables a 440 Wh kg^(-1) lithium metal pouch cell to achieve 130 cycles

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 Chemistry 2024年第3期67卷 751-752页

作者： Xiong Liu Chaojiang niu School of Materials Science and Engineering Zhengzhou UniversityZhengzhou 450001China

Lithium(Li) metal has been considered one of the most promising anodes due to its high theoretical capacity, lightweight and low electrochemical potential. The cell-level energy density of rechargeable lithium metal batteries(LMBs) is expected to surpass 500 Wh kg^(-1) after replacing the graphite anode in lithium-ion batteries [1].

关键词： lithium electrolyte layer

在线全文

学校读者我要写书评

暂无评论

Pharma Markets

China Weekly 2024年第4期 26-29页

作者： niu He Xu ming 不详

Experts caution that despite the rapid growth and expansion of Chinese pharmaceutical companies into the international market,overlooking their financial challenges and profitability issues would threaten their long-t... 详细信息

关键词： companies looking financial

Melatonin Alleviates Abscisic Acid Deficiency Inhibition on Photosynthesis and Antioxidant Systems in Rice under Salt Stress

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Phyton-International Journal of Experimental Botany 2024年第7期93卷 1421-1440页

作者： Feiyu Yan xin Chen Zhenzhen Wang Yuxuan Xia Dehui Zheng Sirui Xue Hongliang Zhao Zhiwei Huang Yuan niu Guoliang Zhang School of Life Sciences and Food Engineering Huaiyin Institute of TechnologyHuai’an223003China Jianghuai Plain Crop Industry Engineering Research Institute Huaiyin Institute of TechnologyHuai’an223003China

Melatonin and abscisic acid,as major plant hormones,play important roles in the physiological and biochemical activities of crops,but the interaction between the two under salt stress is not yet *** study investigated the endogenous levels of melatonin and abscisic acid in rice by using exogenous melatonin,abscisic acid,and their synthetic inhibitors,and examined their interactions under salt *** research results indicate that melatonin and abscisic acid can improve rice salt *** alleviated the salt sensitivity caused by abscisic acid deﬁciency,increased antioxidant enzyme activity and antioxidant content in rice treated with abscisic acid synth-esis inhibitors,and reduced total reactive oxygen species content and thiobarbituric acid reactive substance *** also increased the activity of key photosynthetic enzymes and the content of photosynthetic pigments,maintaining the parameters of photosynthetic gas exchange and chlorophyllﬂ*** summary,melatonin alleviated the effects of abscisic acid deﬁciency on photosynthesis and antioxidant systems in rice and improved salt *** study is beneﬁcial for expanding the understanding of melatonin regulation of crop salt tolerance.

关键词： Melatonin abscisic acid salt stress rice photosynthesis antioxidant system

SETD2 in cancer:functions,molecular mechanisms,and therapeutic regimens

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Cancer Biology & Medicine 2024年第9期21卷 725-730页

作者： Yawen Weng Jing Xue Ningning niu State Key Laboratory of Systems Medicine for Cancer Stem Cell Research CenterRen Ji HospitalShanghai Cancer InstituteShanghai Jiao Tong University School of MedicineShanghai 200127China

In recent years,the histone methyltransferase SET domain containing 2(SETD2)has garnered significant attention for its involvement in *** we aim to summarize the research advances regarding SETD2 in tumors,elucidate the role in global epigenetic regulation,highlight potential therapeutic regimens for patients with SETD2 deficiency,and outline future research directions.

关键词： SETD2 regimen therapeutic