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Structure splitting framework for data-layout optimization

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The Journal of china Universities of Posts and Telecommunications 2009年第5期16卷 107-113页

作者： FU Xiong , WANG Ru-chuan college of Computer, nanjing university of Posts and Telecommunications, nanjing 210003, china [a]college of Computer nanjing university of Posts and Telecommunications nanjing 210003 china

To improve data cache performance, optimizing program data layout by data reorganization has become an important method of decreasing the impact of increasing gap of speed between processor and memory. In this article, a structure splitting framework with an analysis model named structure field relation graph （SFRG） is presented to optimize program data layout. The SFRG can be used to quantify relationship between fields. It helps to find an optimal layout for structure as well as the optimal program data layout. And the data cache performance is improved through SFRG-based structure splitting. Experiments show that this framework is effective in optimizing program data layout and improving the performance of data cache and whole program.

关键词： program optimization structure splitting data layout cache performance

Limit theorems for the weighted occupation time for super-Brownian motions on H~d

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Progress in Natural Science:Materials International 2006年第8期16卷 803-807页

作者： TANG Jiashan (college of Mathematics and Physics, nanjing university of Posts and Telecommunications, nanjing 210003, china) [a]college of Mathematics and Physics Nanjing University of Posts and Telecommunications Nanjing China

Weighted occupation time processes associated with the super-Brownian motions on hyperbolic spaces are investigated. Longtime behavior and a central limit type theorem for the processes are obtained. For all dimension d≥2, the right normings for two fluctuations are t and t1/2 , and the limit results are the Riemannian measure and some centered Gaussian random measure, respectively.

关键词： super-Brownian motion hyperbolic space occupation time process longtime behavior.

Study on Economic growth,Urbanization and Sustainable Utilization of Cultivated Land in china

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Chinese Journal of Population,Resources and Environment 2004年第2期2卷 40-44页

作者： Wu Qun,Guo Guancheng & Fan Licollege of Land Management,nanjing agricultural university,nanjing,210095,china college of Land Management Nanjing Agricultural University Nanjing 210095 China

By means of the dynamic regression model, this paper analyzes the relationships among economic growth, urbanization and changes of cultivated land in china, finds that the ratio of cultivated land occupied by economic growth is decreasing with social and economic growth. And, based on that, some policy suggestions on how to promote the sustainable use of cultivated land in china are put forward.

关键词： economic growth urbanization cultivated land sustainable utilization

On the general expressions of finite Hankel transform

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Science china(Physics,Mechanics & Astronomy) 2010年第11期53卷 2125-2130页

作者： JIANG Quan 1,2 & GAO CunFa 1 1 college of Aerospace Engineering,nanjing university of Aeronautics and Astronautics,nanjing 210016,china 2 School of Civil Engineering,Nantong university,Nantong 226019,china 1. college of Aerospace Engineering Nanjing University of Aeronautics and Astronautics Nanjing 210016 China2. School of Civil Engineering Nantong University Nantong 226019 China

The general expressions of finite Hankel transform are naturally deduced with the help of the property of Bessel *** equations in this paper can degenerate into three kinds of boundaries since all the coefficients in the boundary conditions are taken into *** results can be adopted in solving physics problems involving the finite Hankel transform.

关键词： hankel transform bessel function finite integral

Effect of Silicon on Leaf Ultrastructure, Chlorophyll Content and Photosynthetic Activity of Barley Under Salt Stress

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Pedosphere 1998年第4期8卷 289-296页

作者： LIANG YONGCHAO (Department of Plant Nutrition, college of Natural Reaources and Environmental Science, and Ministry of Agriculture Key Laboratory of Crop Growth and Regulation, nanjing agricultural university, nanjing 210095 china) Department of Plant Nutrition College of Natural Resources and Environmental Science Nanjing Agricultural University Nanjing 210095 China

Two contrasting cultivars of barley (Horderm vykgare L.): Kepin No. 7 (salt sensitive), and Jian 4 (salt tolerant) were grown in a hydroponics system with 2 NaCl levels: 60 mmol NaCl L-1 and 120 mmol NaCl L-1, and 3 Si levels: 0 mmol Si L-1, 0.5 mmol Si L-1 and 1.0 mmol Si L-1 (as silicic acid). Compared with the plants treated with 60 mmol NaCl L-1 alone, the leaf chlorophyll contents of plants treated with salt and Si increased significantly for salt-sensitive cultivar at tillering stage, but for salt-tolerant cultivar,the addition of Si resulted in an obvious increase in the leaf chlorophyll content of plants exposed to 120 mmol NaCl L-1. However, this Si-enhancement of leaf chlorophyll content was also observed in the salttolerant plants at jointing stage, but not in the salt-sensitive plants. Moreover, leaf chlorophyll content was consistently higher for the salt-tolerant cultivar than for the salt-sensitive cultivar irrespective of salt and/or Si treatment. Compared with the plants treated with salt alone, net CO2 assimilation rate in plant leaves increased significantly for both cultivars when trested with salt and Si. The addition of Si to the salt treatment was found to improve the cell ultrastructure of leaves. Under salt stress condition, the double membranes of chloroplasts disappeared, but membrane integrity was markedly improved in the salt treatment supplemented with Si. Silicon was also found to ameliorate the damage to the ultrastructure of chloroplast granae which appeared to be disintegrated and vague in salt treatments without added Si. The results support previous work which showed that Si decreases the permeability of plasma membranes of salt-stressed barley, thus mitigating salt damage.

关键词： barley photosynthesis salt silicon ultrastructure

Three vortex motion in the slightly viscous flow

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Science china(Physics,Mechanics & Astronomy) 2010年第4期53卷 735-744页

作者： ZHU Hao & CHENG KeMing college of Aerospace Engineering, nanjing university of Aeronautics and Astronautics, nanjing 210016, china 1. college of Aerospace Engineering Nanjing University of Aeronautics and Astronautics Nanjing 210016 China

The dynamics of three vortices moving in an ideal fluid in a plane can be expressed in Hamiltonian form. However, when viscosity can not be ignored, the system of point vortices has not this delicious structure. This investigation focuses on the viscosity effect on the motion of three vortices. Since the viscous diffusion of vortices is simulated by Brownian motion, the equations of intervortical distances are obtained by Ito formula. These equations show that there exist two viscosity effects on intervortical distances: stable expansion and random impulse. Furthermore, via employing the asymptotic solution to these equations, these two viscous effects have been shown to destroy the self-similar process of collapse and make it into a new configuration, which is similar to the near collapse in the ideal case.

关键词： point vortex slightly viscous flow Fokker-Planck equation collapse Ito formula

QoS routing based on mobile agent for LEO satellite IP networks

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The Journal of china Universities of Posts and Telecommunications 2009年第6期16卷 57-63页

作者： RAO Yuan,WANG Ru-chuan college of Computer,nanjing university of Posts and Telecommunications,nanjing 230001,china [a] college of Computer nanjing university of Posts and Telecommunications nanjing 230001 china

Current quality of service（QoS） routing schemes for low earth orbit（LEO） satellites IP networks either neglect the varying population density or fail to guarantee end-to-end *** a remedy,QoS routing protocol based on mobile agent（QoSRP-MA） is ***-MA is a source-based routing *** connection requests arrive,QoS mobile agents are dispatched from ingress satellite to explore routes,which migrate using satellite routing *** arriving in egress satellite,QoS mobile agents migrate back towards ingress satellite to reserve *** construct satellite routing tables,load balancing routing algorithm based on mobile agent（LBRA-MA） is *** LBRP-MA,at regular intervals mobile agents launched on all satellites migrate autonomously to evaluate path cost and update routing ***,path cost between source and destination is evaluated considering satellite geographical position as well as inter-satellite link（ISL） ***,ISL congestion index is considered to update routing *** simulations on a Courier-like constellation,it shows that QoSRP-MA can achieve guaranteed end-to-end delay bound with higher throughput,lower connection failing ratio and signaling overhead compared to high performance satellite routing（HPSR） scheme.

关键词： QoS routing load balancing mobile agent satellite IP networks

Advances on methods for mapping QTL in plant

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Science Bulletin 2006年第23期51卷 2809-2818页

作者： ZHANG Yuan-Ming Section on Statistical Genomics, State Key Laboratory of Crop Genetics and Germplasm Enhancement/National Center for Soybean Improvement, college of Agriculture, nanjing agricultural university, nanjing 210095, china Section on Statistical Genomics State Key Laboratory of Crop Genetics and Germplasm Enhancement/National Center for Soybean Improvement College of Agriculture Nanjing Agricultural University Nanjing China

Advances on methods for mapping quantitative trait loci (QTL) are firstly summarized. Then, some new methods, including mapping multiple QTL, fine mapping of QTL, and mapping QTL for dynamic traits, are mainly described. Finally, some future prospects are proposed, including how to dig novel genes in the germplasm resource, map expression QTL (eQTL) by the use of all markers, phenotypes and micro-array data, identify QTL using genetic mating designs and detect viability loci. The purpose is to direct plant geneticists to choose a suitable method in the inheritance analysis of quantitative trait and in search of novel genes in germplasm resource so that more potential genetic information can be uncovered.

关键词： quantitative trait locus parameter estimation effect maximum likelihood method Bayesian method.

Effect of Low-Molecular-Weight Organic Acids on Cl-Adsorption by Variable Charge Soils

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Pedosphere 2004年第3期14卷 405-408页

作者： XURen-Kou YANGMa-Li WANGQiang-Sheng JIGuo-Liang InstituteofSoilScience ChineseAcademyofSciencesNanjing210008（China） collegeofagronomy NanjingAgriculturalUniversityNanjing210095（China）

Low-molecular-weight (LMW) organic acids exist widely in soils and have beenimplicated in many soil processes. The objective of the present paper was to evaluate effect of twoLMW organic acids, citric acid and oxalic acid, on Cl^-adsorption by three variable charge soils, alatosol, a lateritic red soil and a red soil, using a batch method. The results showed that thepresence of citric acid and oxalic acid led to a decrease in Cl^- adsorption with larger decreasesfor citric acid. Among the different soils Cl^- adsorption in the lateritic red soil and the redsoil was more affected by both the LMW organic acids than that in the latosol.

关键词： Cl^- adsorption organic acids variable charge soils