检索结果-南通市图书馆

Numerical Mathematics(Theory,Methods and Applications) 2018年第1期11卷 128-139页

作者： Rui Li yan Wang Junfeng yin School of Mathematical Sciences Tongji UniversityShanghai 200092China College of Mathematics Physics and Information Engineering Jiaxing UniversityZhejiang 314001China

We propose the two-step modulus-based matrix splitting iteration methods for a class of nonlinear complementarity *** corresponding convergence the-ory is established when the system matrix is an H_(+)-*** analysis gives the choice of parameter matrix involved based on the H-compatible splitting of the sys-tem ***,in actual implementation,the choices of iterative parameters for two-step modulus-based accelerated overrelaxation methods are ***-cal experiments show that the method is efficient and further verify the convergence theorems.

关键词： Nonlinear complementarity problems two-step modulus-based matrix splitting meth-ods H_(+)-matrix H-compatible splitting

Design and realization of phase retardation-control polarization controllers based on artificial birefringence

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

The Journal of China Universities of Posts and Telecommunications 2011年第6期18卷 116-121页

作者： LIAO yan-na yin YA-fang School of Electronic Engineering Xi＇an University of Posts and Telecommunications Xi＇an 710121 China

Polarization controllers （PCs） are indispensable passive components for state of polarization （SOP） control in optical fiber communication systems. In order to overcome the disadvantages of existing polarization controller （PC）, a novel PC based on the artificial birefringence is designed in this paper. The PC results from the concatenation of 3 phase retardation control units each of which consists of two polarization beam splitters, two prisms and one piezoz-lectric transducer （PZT） piezoelectric ceramic. The experimental results show that the proposed PC can convert an arbitrary input SOP to any expected output one with high accuracy under low control voltage.

关键词： PC artificial birefringence piezoelectric ceramic component

RNA editing machinery in plant organelles

在线全文

学校读者我要写书评

暂无评论

Science China(Life Sciences) 2018年第2期61卷 162-169页

作者： Junjie yan Qunxia Zhang Ping yin National Key Laboratory of Crop Genetic Improvement and National Centre of Plant Gene Research Huazhong Agricultural University

RNA editing is a type of post-transcriptional modification that includes nucleotide insertion/deletion or conversion. Different categories of RNA editing have been widely observed in distinct RNAs from divergent organisms. In flowering plants, RNA editing usually alters cytidine to uridine in plastids and mitochondria, playing important roles in various plant developmental processes, including organelle biogenesis, adaptation to environmental changes, and signal transduction. Numerous studies have demonstrated that a number of factors are involved in plant RNA editing, such as pentatricopeptide repeat(PPR) proteins, multiple organelle RNA editing factors(MORF, also known as RIP), organelle RNA recognition motif(ORRM) containing proteins,protoporphyrinogen IX oxidase 1(PPO1) and organelle zinc finger 1(OZ1). These factors play diverse roles in plant RNA editing due to their distinct characteristics. In this review, we discuss the functional roles of the individual editing factors and their associations in plant RNA editing.

关键词： RNA editing editosome plant organelles

A Sufficient Condition for Planar Graphs with Maximum Degree 8 to Be 9-totally Colorable

在线全文

学校读者我要写书评

暂无评论

Acta Mathematica Sinica,English Series 2014年第6期30卷 993-1006页

作者： Jian Sheng CAI Chang Chun teng Gui ying yan School of Mathematics and Information Sciences Weifang University Academy of Mathematics and Systems Science Chinese Academy of Sciences

A total k-coloring of a graph G is a coloring of V（G） ∪ E（G） using k colors such that no two adjacent or incident elements receive the same color. The total chromatic number χ＇＇（G） is the smallest integer k such that G has a total k-coloring. It is known that if a planar graph G has maximum degree △≥ 9, then ）χ″（G） =△＋ 1. In this paper, we prove that if O is a planar graph with maximum degree 8 and without a fan of four adjacent 3-cycles, then χ″（G） =- 9.

关键词： Total coloring planar graph a fan of four adjacent 3-cycles

Development of water-soluble zein colloid particles and in situ antibacterial evaluation by multiple headspace extraction gas chromatography

在线全文

学校读者我要写书评

暂无评论

Food Science and Human Wellness 2021年第2期10卷 191-196页

作者： yan yin Fuzhen Zhou Yechong yin Yonghong Peng School of Life Science Huizhou UniversityHuizhou 516007China Research and Development Center of Food Proteins School of Food Science and EngineeringSouth China University of TechnologyGuangzhou 510640China School of Life Science South China Normal UniversityGuangzhou 510640China

In this work,water-soluble zein/sodium caseinate(SC)nanoparticles were prepared as a delivery system of antimicrobials through anti-solvent *** model antimicrobials(nisin and thymol)were coencapsulated into zein particles by different *** properties indicate that zein colloid particles can be used not only in neutral food but also in acidic *** is worth mention that the release of thymol was delayed simply by adding *** investigate the antimicrobial properties of zein/SC particles,Escherichia coli and Bacillus subtilis,Listeria monocytogenes were selected as gram-negative and gram-positive indicator ***2 produced by incubated germs was detected by headspace gas ***-term effective antimicrobial activities of zein particles in Luria broth was attained by burst release of nisin and slowly sustained release of *** antimicromibial properties against *** of thymol and nisin loaded by zein/SC particles in milk were also *** antimicrobial property of zein/SC particles could enhance microbial safety of food,giving this delivery system promising applications in food industry.

关键词： Zein/SC nanoparticles Antimicrobial Thymol Nisin Delivery system

Graphic Sequences with a Realization Containing Intersecting Cliques

在线全文

学校读者我要写书评

暂无评论

Acta Mathematica Sinica,English Series 2012年第2期28卷 405-416页

作者： Jian Hua yin yan Fang DENG Department of Mathematics College of Information Science and Technology Hainan University

Let r ≥1, k ≥ 2 and Fm1,… k;r denote the most general definition of a friendship graph,

关键词： Degree sequence potentially P-graphic sequence

Efficient closed-form solution for target localization using TDOA measurements in the presence of sensor position errors

在线全文

学校读者我要写书评

暂无评论

The Journal of China Universities of Posts and Telecommunications 2017年第4期24卷 1-9,15页

作者： yan Leibing Zhang Yerong Lu yin School of Electronic Science and Engineering Nanjing University of Posts and Telecommunications Department of Electronics and Communication Engineering Henan Institute of Technology

An efficient solution for locating a target was proposed, which by using time difference of arrival （TDOA） measurements in the presence of random sensor position errors to increase the accuracy of estimation. The cause of position estimation errors in two-stage weighted least squares （TSWLS） method is analyzed to develop a simple and effective method for improving the localization performance. Specifically, the reference sensor is selected again and the coordinate system is rotated according to preliminary estimated target position by using TSWLS method, and the final position estimation of the target is obtained by using weighted least squares （WLS）. The proposed approach exhibits a closed-form and is as efficient as TSWLS method. Simulation results show that the proposed approach yields low estimation bias and improved robustness with increasing sensor position errors and thus can easily achieve the Cramer-Rao lower bound （CRLB） easily and effectively improve the localization accuracy.

关键词： target localization TDOA sensor position errors CRLB

Some Weak Specification Properties and Strongly Mixing

在线全文

学校读者我要写书评

暂无评论

Chinese Annals of Mathematics,Series B 2017年第5期38卷 1111-1118页

作者： Qi yan Jiandong yin Tao WANG Department of Mathematics Nanchang University Nanchang 330031 China

In this paper, the authors first construct a dynamical system which is strongly mixing but has no weak specification property. Then the authors introduce two new concepts which are called the quasi-weak specification property and the semi-weak specification property in this paper, respectively, and the authors prove the equivalence of quasi-weak specification property, semi-weak specification property and strongly mixing.

关键词： Weak specification property Mixing property Symbolic dynamics

Proteomics-based identification of proteins in tumor-derived exosomes as candidate biomarkers for colorectal cancer

在线全文

学校读者我要写书评

暂无评论

World Journal of Gastrointestinal Oncology 2023年第7期15卷 1227-1240页

作者： Ge-Yu-Jia Zhou Dong-yan Zhao teng-Fei yin Qian-Qian Wang Yuan-Chen Zhou Shu-Kun Yao Department of Gastroenterology China-Japan Friendship Hospital(Institute of Clinical Medical Sciences)Beijing 100029China Graduate School Chinese Academy of Medical Sciences&Peking Union Medical CollegeBeijing 100730China Graduate School Peking University China-Japan Friendship School of Clinical MedicineBeijing 100029China Department of Gastroenterology China-Japan Friendship HospitalBeijing 100029China

BACKGROUND Colorectal cancer(CRC)is the second leading cause of cancer-related death,with high morbidity *** is an urgent need to find reliable diagnostic biomarkers of CRC and explore the underlying molecular *** are involved in intercellular communication and participate in multiple pathological processes,serving as an important part of the tumor *** To investigate the proteomic characteristics of CRC tumor-derived exosomes and to identify candidate exosomal protein markers for *** In this study,10 patients over 50 years old who were diagnosed with moderately differentiated adenocarcinoma were *** paired CRC tissues and adjacent normal intestinal tissues(>5 cm)to form the experimental and control *** exosomes were extracted separately from each tissue ***-independent acquisition mass spectrometry was implemented in 8 matched samples of exosomes to explore the proteomic expression profiles,and differentially expressed proteins(DEPs)were screened by bioinformatics *** exosomal proteins were verified using parallel reaction monitoring(PRM)analysis in 10 matched exosome *** A total of 1393 proteins were identified in the CRC tissue group,1304 proteins were identified in the adjacent tissue group,and 283 proteins were significantly differentially expressed between *** analysis revealed that DEPs were involved in multiple biological processes related to cytoskeleton construction,cell movement and migration,immune response,tumor growth and telomere metabolism,as well as ECM-receptor interaction,focal adhesion and mTOR signaling *** differentially expressed exosomal proteins(NHP2,OLFM4,TOP1,SAMP,TAGL and TRIM28)were validated by PRM analysis and evaluated by receiver operating characteristic curve(ROC)*** area under the ROC curve was 0.93,0.96,0.97,0.78,0.75,and 0.88(P<0.05)for NHP2,OLFM4,TOP1,SAMP,TAGL,and TRIM28,respectively,indicati

关键词： Exosomes Colorectal cancer Data-independent acquisition Parallel reaction monitoring Biomarker

Study on NiO/Fe interface with X-ray photoelectron spectroscopy

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

International Journal of Minerals,Metallurgy and Materials 2010年第6期17卷 777-781页

作者： Chun Feng Jing-yan Zhang Jiao teng Fu-ming Wang School of Materials Science and Engineering University of Science and Technology Beijing Beijing 100083 China School of Metallurgical and Ecological Engineering University of Science and Technology Beijing Beijing 100083 China

Different monolayers （ML） of Fe atoms were deposited on NiO （001） substrates or NiO underlayers using molecular beam epitaxy （MBE）, pulse laser deposition （PLD）, and magnetron sputtering （MS）. The magnetic properties and microstructure of the films were studied. The apparent magnetic dead layer （MDL） is found to exist at the NiO/Fe interfaces of the MBE sample （about 2 ML MDL）, the PLD sample （about 3 ML MDL）, and the MS sample （about 4 ML MDL）. X-ray photoelectron spectroscopy indicates the presence of ionic Fe （Fe2＋ or Fe3＋） and metallic Ni at the NiO/Fe interfaces, which may be due to the chemical reactions between Fe and NiO layers. This also leads to the formation of MDL. The thickness of the MDL and the reaction products are related with the deposition energy of the atoms on the substrates. The interfacial reactions are effectively suppressed by inserting a thin Pt layer at the NiO/Fe interface.

关键词： interracial reaction magnetic films X-ray photoelectron spectroscopy magnetic properties microstructure