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Chinese Annals of Mathematics,Series B 2008年第4期29卷 441-458页

作者： Junping yin Zhong tan Department of Mathematics Xiamen University Xiamen 361005 Fujian China.

The authors prove two global existence results of strong solutions of the isentropic compressible Navier-Stokes-Poisson equations in one-dimensional bounded intervals. The first result shows only the existence. And the second one shows the existence and uniqueness result based on the first result, but the uniqueness requires some compatibility condition. In this paper the initial vacuum is allowed, and T is bounded.

关键词： Global strong solutions Navier-Stokes-Poisson equations Existence and uniqueness

Global Existence of the Radially Symmetric Strong Solution to Navier-Stokes-Poisson Equations for Isentropic Compressible Fluids

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Acta Mathematica Sinica,English Series 2009年第10期25卷 1703-1720页

作者： Jun Ping yin Zhong tan Department of Mathematics Xiamen University Xiamen 361005 P. R. China

We prove the two existence results of the radially symmetric strong solutions to the Navier- Stokes-Poisson equations for isentropic compressible fluids. The important point in this paper is that the initial density i... 详细信息

关键词： Navier-Stokes-Poisson equations annular domain radially symmetric solution strong solution existence

On the Walsh spectrum of a family of quadratic APN functions with five terms

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Science China(Information Sciences) 2014年第2期57卷 271-277页

作者： QU LongJiang tan yin LI Chao Department of Mathematics and System Science Science CollegeNational University of Defense Technology Department of Electrical and Computer Engineering University of Waterloo

Recently,a family of quadratic APN functions was demonstrated by Bracken et *** exist over F22k with k even and 3 *** family of APN functions was firstly proposed by Budaghyan et *** they exist provided the existence of a quadratic polynomial of the type x2s+1+cx2s+c2k x+1 with no zeros in *** et *** such polynomials when k is even and 3 *** this paper,we show that such polynomials exist for all even integers *** a result,the APN functions over F22k exist for all even ***,the Walsh spectra of these APN functions is shown to be the same as the one of the Gold APN *** gives a positive answer to one conjecture.

关键词： APN function Walsh spectrum nonlinearity quadratic polynomial polynomial with no zeros

COOPERATIVE CLUSTERING BASED ON GRID AND DENSITY

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Chinese Journal of Mechanical Engineering 2006年第4期19卷 544-547页

作者： HU Ruifei yin Guofu tan ying CAI Peng School of Manufacturing Science and Engineering Sichuan University Chengdu 610065 China

Based on the analysis of features of the grid-based clustering method-clustering in quest （CLIQUE） and density-based clustering method-density-based spatial clustering of applications with noise （DBSCAN）, a new clustering algorithm named cooperative clustering based on grid and density （CLGRID） is presented. The new algorithm adopts an equivalent rule of regional inquiry and density unit identification. The central region of one class is calculated by the grid-based method and the margin region by a density-based method. By clustering in two phases and using only a small number of seed objects in representative units to expand the cluster, the frequency of region query can be decreased, and consequently the cost of time is reduced. The new algorithm retains positive features of both grid-based and density-based methods and avoids the difficulty of parameter searching. It can discover clusters of arbitrary shape with high efficiency and is not sensitive to noise. The application of CLGRID on test data sets demonstrates its validity and higher efficiency, which contrast with tradi- tional DBSCAN with R tree.

关键词： Data mining Clustering Seed object

Lentiviral-mediated vascular endothelial growth factor 165 gene transfer into neural stem cells promotes proliferation

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Neural Regeneration Research 2011年第19期6卷 1457-1461页

作者： Shanshan Zhang Xiangrong Zheng Fei yin Jielu tan Yujia Yang Department of Pediatrics Xiangya Hospital Central South University Changsha 410008 Hunan Province China

We constructed a lentiviral vector carrying vascular endothelial growth factor 165, which was used to transfect neural stem cells. The transfection rate was approximately 50%, as determined by flow cytometry. Vascular... 详细信息

关键词： vascular endothelial growth factor 165 gene therapy lentivirus neural stem cells transfection

An Energy-Efcient Mobile-Sink Path-Finding Strategy for UAV WSNs

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Computers, Materials & Continua 2021年第6期67卷 3419-3432页

作者： Lyk yin tan Hock Guan Goh Soung-Yue Liew Shen Khang Teoh Department of Computer and Communication Technology Faculty of Information and Communication TechnologyUniversiti Tunku Abdul RahmanPerak31900Malaysia

Data collection using a mobile sink in a Wireless Sensor Network(WSN)has received much attention in recent years owing to its potential to reduce the energy consumption of sensor nodes and thus enhancing the lifetime of the ***,a critical issue of this approach is the latency of data to reach the base *** many data collection algorithms have been introduced in the literature to reduce delays in data delivery,their performances are affected by the ight trajectory taken by the mobile sink,which might not be optimized *** paper proposes a new path-nding strategy,called Energy-efciency Path-nding Strategy(EPS)in the Air-Ground Collaborative Wireless Sensor Network(AGCWSN).The proposed approach is able to greatly enhance the efciency of data *** performance of the proposed strategy is simulated and compared with the existing strategies over several *** simulation results show that the mobile sink with EPS can collects data with lower data delivery delay as compared to other existing *** number of data retransmissions between sensor nodes and mobile sink in EPS is also the lowest in EPS among several existing *** data delivery delay is 66%and 120%lower than Rest Center Tractor Scanning(RCTS)and Non-stop Center Tractor Scanning(NCTS)in irregular and grid topology *** data delivery delay is 62%lower than Two Row Scanning(TRS)in grid topology and 120%lower than RkM in irregular *** packet loss of EPS-2 is 1.3%lower than RkM.

关键词： Wireless network mobile sink efcient path data colle

A comparative study of four 20-membered N_2S_4-crown ethers as ionophores for polymeric membrane silver selective electrodes

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Chinese Chemical Letters 2010年第4期21卷 464-467页

作者： Zhang, Jun Yu, Shun Yang yin, tan Ji Hu, Xue Feng Qin, Wei Chinese Acad Sci Yantai Inst Coastal Zone Res Key Lab Coastal Environm Proc Yantai 264003 Peoples R China Chinese Acad Sci Inst Oceanol Qingdao 266071 Peoples R China Chinese Acad Sci Grad Univ Beijing 100049 Peoples R China

Four 20-membered N_2S_4-monoazathiacrown ethers have been synthesized and explored as neutral ionophores for Ag^+-selective *** responses reveal that the flexibility of the ligands has great effect on the selectivity and sensitivity to Ag^+ *** electrode based on ionophore 9,10,20,25-tetrahydro-5H,12H-tribenzo[b,n,r][1,7,10,16,4,13]tetrathiadiaza cycloicosine 6,13-(7H,14H)-dione(C) with 2-nitrophenyl octyl ether(o-NPOE) as solvent in a poly(vinyl chloride)(PVC) membrane matrix sho...

关键词： Ion-selective electrodes Silver Ionophore Azathiacrown ether

Dynamic trend analysis on relational effect of environmental protection industry in China

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Ecological Economy 2006年第2期2卷 170-182页

作者： Liang Yanju yin Xiguo tan Zhixiong Ren Yanyan Chongqing University Chongqing 400030. P.R.China

EPI （environmental protection indastry） and three industries constitute aur national economic structuse. By Grey System Theory and correlation effect analytical method for the first time, this paper analyzes the relatioaship degree between environmental protection industry and the three causes including industries involved in China in both qualitative and quantitotive aspects. Both the innate tale and the realistic reasons nf the relational degree are further analyzed by utilizing sastninoble development theory, circulating economy theol., ecological equilibrium theory, externality theory. industrial structure theory, and ecology prinrity rules. From all the analysts, this paper reveals the relationship between EPI and three industries. In addition, it offers suggestions to the feasibility of adjusting the industrial structure and developing the environmental protection industry in our country.

关键词： Grey system Relationship degree Environmental protection industry Dynamic trend analysis

Early Paleozoic geodynamic evolution of the Eastern Central Asian Orogenic Belt: Insights from granitoids in the Xing’an and Songnen blocks

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Geoscience Frontiers 2020年第6期11卷 1975-1992页

作者： Xin-Lu Hu Shu-Zhen Yao Cheng-yin tan Guo-Ping Zeng Zhen-Ju Ding Mou-Chun He Faculty of Earth Resources China University of GeosciencesWuhan430074China National Demonstration Center for Experimental Mineral Exploration Education China University of GeosciencesWuhan430074China Heilongjiang Mining Group Limited Liability Company Harbin150036China Wuhan Center China Geological SurveyWuhan430205China

The early Paleozoic tectonic framework and evolutionary history of the eastern Central Asian Orogenic Belt(CAOB)is poorly *** we present zircon U-Pb geochronology,whole rock geochemistry,and Sr-NdHf isotope data of the early Paleozoic granitoids in eastern CAOB to investigate the petrogenesis and geodynamic *** early Paleozoic granitoids from the Songnen Block yield zircon U-Pb ages of 523-490 Ma,negative εNd(t)values of-6.7 to-0.8,and values of-8.6 to 7.1,indicating they were generated by partial melting of ancient crustal materials with various degrees of mantle *** generally show affinities to A-type granites,implying their generation from an extensional environment after the collision between the Songnen and Jiamusi *** comparison,the early Paleozoic granitoids from the Xing’an Block have zircon U-Pb ages of 480-465 Ma,εNd(t)values of-5.4 to 5.4,andεHf(t)values of-2.2 to 12.9,indicating a dominated juvenile crustal source with some input of ancient crustal *** belong to I-type granites and were likely related to subduction of the Paleo-Asian *** statistics of TDM2 Hf model ages of the granitoids indicate that the Erguna and Jiamusi blocks contain a significant proportion of Mesoproterozoic crystalline basement,while the Xing’an Block is dominated by a Neoproterozoic *** on these observations,the early Paleozoic evolutionary history of eastern GAOB can be divided into four stages:(1)before 540 Ma,the Erguna,Xing’an,Songnen,and Jiamusi blocks were discrete microcontinents separated by different branches of the Paleo-Asian Ocean;(2)540-523 Ma,the Jiamusi Block collided with the Songnen Block along the Mudanjiang suture;(3)ca.500 Ma,the Erguna Block accreted onto the Xing’an Block along the Xinlin-Xiguitu suture;(4)ca.480 Ma,the Paleo-Asian Ocean started a double-side subduction beneath the united Erguna-Xing’an and Songnen-Jiamusi blocks.

关键词： Early Paleozoic U–Pb geochronology Sr-Nd-Hf isotopes NE China Central Asian Orogenic Belt

Submerged fermentation improves bioactivity of mulberry fruits and leaves

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Chinese Herbal Medicines 2021年第4期13卷 565-572页

作者： Hui Qian Chuah Pei Ling tang Ni Jing Ang Hui yin tan Department of Bioscience Faculty of Applied SciencesTunku Abdul Rahman University CollegeSetapak 53300Kuala LumpurMalaysia

Objective:Mulberry(Morus spp.)fruits and leaves have been proven to possess nutraceutical *** to its fast and easy growing characteristics,mulberry fruits(MF)and leaves(ML)potentially emerge as a great source of functional *** study aims to enhance bioactivities(antioxidant,antiinflammation,and hypoglycemic activity)of MF and ML via submerged fermentation using bacteria(Lactobacillus plantarum TAR 4),yeast(Baker’s yeast and red yeast)and fungi(Tempeh and Tapai starter).Methods:In this study,25%(mass to volume ratio)of MF and ML were fermented(48 h)with 1%(mass to volume ratio)of different microbial cultures,*** of different fermentations on MF and ML were determined based on the changes of total phenolics(TPC),flavonoids(TFC),anthocyanins,total sugar,DPPH activity,ferric reducing antioxidant power(FRAP),albumin denaturation inhibition activity(ADI),anti-lipoxygenase activity and a-amylase inhibition activity(AI).Results:Generally,ML had higher AI than ***,MF exhibited higher DPPH,FRAP and antilipoxygenase activity than *** all forms of fermentation,DPPH and AI activity of MF and ML were increased significantly(P<0.05).However,the effects of fermentation on TPC,FRAP,ADI and antilipoxygenase activity of MF were in contrast with ***,FRAP and anti-lipoxygenase activity of ML were enhanced,but reduced in MF after *** the effects exerted by different microorganisms in MF and ML fermentation were different,the bioactivities of MF and ML were generally improved after *** by Tempeh starter enhanced TPC(by 2-fold),FRAP(by 2.3-fold),AI(at 10%increment)and anti-lipoxygenase activity(by 5-fold)of ML,whereas Tapai fermentation effectively enhanced the DPPH(at 17%increment)and ADI(by 2-fold)activity of ***:Findings of this study provide an insight into the future process design of MF and ML processing into novel functional foods.

关键词： anti-inflammation activity antioxidant activity fermentation hypoglycemic activity mulberry fruits mulberry leaves