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Uniform Query Framework for Relational and NoSQL Databases

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Computer modeling in Engineering & Sciences 2017年第2期113卷 171-181页

作者： J.b.Karanjekar m.b.Chandak Shri Ramdeobaba College of Engineering and management NagpurIndia and Izel Technologies Pvt Ltd.PuneIndia Shri Ramdeobaba College of Engineering and management NagpurIndia

As the data managed by applications has evolved over the years with the arrival of Web 2.0,a large number of new databases have been developed to manage various types of *** the traditional relational databases continue to exist,NoSQL databases which are document oriented or key-value stores or columnar continue to evolve and are embraced very rapidly across the *** is not just the type of data handled by these databases that is different but also the query language they use is also *** paper talks about a uniform query framework that can be used for traditional relational databases and NoSQL *** query framework can also perform joins,aggregates,filter on data from various data sources in a single query.

关键词： NoSQL RDbmS data tetrieval inter-database joins SQL Cassandra mongoDb Calcite mySQL

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力矩激励器及其在结构声实验中的应用

应用科学学报 1994年第1期12卷 46-52页

作者：邱树业 b.m.吉布斯汕头大学物理系英国利物浦大学声学研究单位

讨论了利用两根磁致伸缩棒（Ｔｂ＿０，＿３Ｄｙ＿０，＿７Ｆｅ＿（１，９５））组成的力矩激励器的特性．简单的理论和实验表明：力矩激励器的特性对力矩导纳测量结果基本上不会造成影响，但显然会影响力矩激励器激发转动的效率．最后... 详细信息

讨论了利用两根磁致伸缩棒（Ｔｂ＿０，＿３Ｄｙ＿０，＿７Ｆｅ＿（１，９５））组成的力矩激励器的特性．简单的理论和实验表明：力矩激励器的特性对力矩导纳测量结果基本上不会造成影响，但显然会影响力矩激励器激发转动的效率．最后计算了这个效率．

关键词：力矩激励器磁致伸缩棒结构声

Theoretical study of differential cross sections for the ionization of helium by fast proton impact

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作者： [苏]b.m.卡曼柯维奇

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Chinese Physics b 2024年第11期33卷 255-264页

作者： m mondal b.m.ndal T mistry D Jana m Purkait Department of Physics Ramakrishna Mission Residential CollegeNarendrapurKolkata-700103India

We present the angular distribution of the ejected electron for single ionization of He by fast proton impact.A fourbody formalism of the three-Coulomb wave is applied to calculate the triple differential cross sections at several impact energies in the scattering,perpendicular and azimuthal ***,the three-body formalism of three-Coulomb,two-Coulomb and first born approximation models has also been used to study the many-body effect on electron emission and the validity of the *** the three-Coulomb wave model,the final state wave function incorporates distortion due to the three-body mutual Coulombic *** this formalism,we use an uncorrelated and correlated born initial state,which consists of a plane wave for the incoming projectile times a two-electron bound state wavefunction of the helium atom representing the 1s2(1S)***,in the case of the three-body formalism,the initial state wavefunction consists of a long-range Coulomb distortion for the incoming projectile and one active electron of the He atom described by the Roothaan–Hartree–Fock *** structure with a single or two peaks with unequal intensity is observed in the angular distributions of the triple differential cross sections for the different kinematic *** addition,the influence of static electron correlations is investigated using different bound state wavefunctions for the ground state of the He *** the four-body formalism,the present computations are very fast by reducing a nine-dimensional integral to a two-dimensional real *** the simplicity and speed of the proposed quadrature,the comparison shows that the obtained results are in reasonable agreement with the experiment and are compatible with those of other theories.

关键词： ionization cross sections collision atoms ions

Incipient motion of gravel in a bottomless arch culvert

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International Journal of Sediment Research 2011年第1期26卷 15-26页

作者： b.m.CROOKSTON b.P.m.TULLIS Utah State University 8200 Old Main HillLoganUT 84322

Incipient motion was investigated for four gravel substrate materials in a bottomless arch culvert and a rectangular *** methods for calculating Shields parameter at incipient motion（θc） based upon local flow parameters were *** incipient motion region for bottomless arch culverts in fully turbulent flow was defined with two bounding curves on Shields *** variation ofθcas a function of relative roughness was ***,a method that utilizes measured flow velocities to determine stable substrate particle diameters for bottomless arched culverts is presented as an alternative to the Shields diagram.

关键词： Incipient motion bottomless arch culvert Shields parameter Flow rate Experiment

Compocasting of A356-CNT composite

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作者： [苏]b.m.库什尼尔

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Transactions of Nonferrous metals Society of China 2010年第9期20卷 1561-1566页

作者： b.AbbASIPOUR b.NIROUm AND S.m.mONIR VAGHEFI Department of materials Engineering Isfahan University of Technology

A356 aluminum alloys reinforced with carbon nano-tubes (CNTs) were produced by stir casting and compocasting routes and their microstructural characteristics and hardness were *** order to alleviate the problems associated with poor wettability, agglomeration and gravity segregation of CNTs in the melt, CNTs were introduced into the melts by injection of CNT deposited aluminum particles instead of raw *** particles with mean diameters of less than 100 μm were first deposited by CNTs using Ni-P electroless plating technique and then injected into the melt agitated by a mechanical *** slurry was subsequently cast at temperatures corresponding to full liquid as well as 0.15 and 0.30 solid *** results show that addition of CNTs to A356 matrix can significantly refine both full liquid and semi-solid cast *** of the samples is also significantly increased by addition of CNTs and A356-CNT composite cast at 0.3 solid fraction produces the highest hardness.

关键词： A356-CNT composite carbon nano-tube (CNT) compocasting electroless plating microstructure hardness

Critical Finite Size Scaling Relation of the Order-Parameter Probability Distribution for the Three-Dimensional Ising model on the Creutz Cellular Automaton

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作者： [苏]b.m.卡缅科维奇

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Chinese Physics Letters 2006年第10期23卷 2670-2673页

作者： b.Kutlu m.Civi Department of Physics Gazi University 06500 Ankara Turkey

We study the order parameter probability distribution at the critical point for the three-dimensional spin-1/2 and spin-1 Ising models on the simple cubic lattice under periodic boundary conditions. The finite size scaling relation for the order parameter probability distribution is tested and verified numerically by microcanonical Creutz cellular automata simulations. The state critical exponent δ, which characterizes the far tail regime of the scaling order parameter probability distribution, is estimated for three-dimensional Ising models using the cellular automaton simulations at the critical temperature. The results are in good agreement with the monte Carlo calculations.

关键词： bLUmE-CAPEL mODEL mONTE-CARLO RENORmALIZATION-GROUP TRICRITICAL bEHAVIOR FREE-ENERGY mAGNETIZATION UNIVERSALITY SImULATION DImENSIONS EXPONENTS