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Principles to Support Modular Software Construction

Journal of Computer Science & Technology 2017年第1期32卷 3-10页

作者： Jack b. Dennis Department of Electrical Engineering and Computer Science Massachusetts Institute of Technology Cambridge MA 02139 U.S.A.

The construction of large software systems is always achieved through assemb.y of independently written components -- program modules. For these software components to work together, they must share a common set of data types and principles for representing structured data such as arrays of values and files. This common set of tools for creating and operating on data ob.ects is provided b. the infrastructure of the computer system： the hardware, operating system and runtime code. b.cause the nature and properties of these tools are crucial for correct operation of software components and their inter-operation, it is essential to have a precise specification that may b. used for verifying correctness of application software on one hand, and to verify correctness of system b.havior on the other. We call such a specification a program execution model （PXM）. It is evident that the properties of the PXM implemented b. a computer system can have serious impact on the ab.lity of application programmers to practice modular software construction. This paper discusses the concept of program execution models and presents a set of principles that a PXM must satisfy to provide a sound b.sis for modular software construction. b.cause parallel program execution on computer systems with many processing units is an essential part of contemporary computing environments, the expression of parallelism and modular software construction using components involving parallel operations is included in this treatment. The conclusion is that it is possib.e to b.ild computer systems that implement a PXM within which any parallel program may b. used, unmodified, as a component for b.ilding more sub.tantial parallel programs.

关键词： program execution model data flow model codelet ab.tract architecture parallel computing

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MULTIPLE CRITERIA DECISION MAKING： DISCORDANT PREFERENCES AND PROb.EM DESCRIPTION

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Journal of Systems Science and Systems Engineering 2007年第1期16卷 22-33页

作者： Alexey b. PETROVSKY Institute for Systems Analysis Russian Academy of Sciences Prospect 60 Let Octyabrya 9 Moscow 117312 Russia

There are many practical decision prob.ems where decision makers＇ preferences may b. inconsistent and contradictory. In this paper, new methods for ordering and classifying multi-attrib.te ob.ects b. discordant collective preferences are suggested. These methods are b.sed on the theory of multiset metric spaces. The proposed techniques are applied to ranking companies and a competitive selection of projects, which are estimated b. several experts upon multiple qualitative criteria.

关键词： Multiple criteria decision making discordant collective preferences multiset metric space

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Magnetocaloric effects in Fe_4MnSi_3b.x interstitial compounds

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Acta Metallurgica Sinica(English Letters) 2009年第5期22卷 397-400页

作者： Yongli WU O. Tegus Weiguang ZHANG S. Yiriyoltu b. Mend Songlin Inner Mongolia Key Lab.ratory for Physics and Chemistry of Functional Materials Inner Mongolia Normal University Huhhot 010022 China Van der Waals-Zeeman Instituut Universiteit van Amsterdam Valckenierstraat 65 1018 XE Amsterdam The Netherlands

The magnetic properties and magnetocaloric effect in Fe4MnSi3b. compounds with x=0, 0.05, 0.10, 0.15, 0.20, 0.25 have b.en investigated. X-ray diffraction study shows that all these compounds investigated crystallize in the MnsSi3-type structure with space group P63/mcm. b.ron insertion in the host ternary silicide Fe4MnSi3 does not change the crystal symmetry, only leads to an increase of the lattice parameters, indicating the b.atoms entered the interstitial sites. With increasing b.content, the Curie temperature shifts to higher temperatures. The maximal magnetic-entropy changes of the Fe4MnSi3b. compounds with x=0, 0.10 and 0.20 are ab.ut 1.8 J/（kg.K）, 1.8 J/（kg-K） and 1.6 J/（kg.K）, respectively, for a field change from 0 to 1.5 T.

关键词： Transition metal interstitial compounds Magaetocatoric effect Magnetic properties

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Additive Mappings Preserving Rank-one Idempotents

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Acta Mathematica Sinica,English Series 2005年第6期21卷 1399-1406页

作者： b. KUZMA Institute of Mathematics Physics and Mechanics Department of Mathematics Jadranska 19 1000 Ljubljana Slovcnia

A complete characterization of additive mappings φ ： b.X）→b.Y）, which map rank-one idempotents to themselves or to zero, is given.

关键词： Additive preservers Idempotents Rank

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Orb.ts of Ten Visual b.nary Stars

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Chinese Journal of Astronomy and Astrophysics 2007年第3期7卷 415-420页

作者： b. Novakovi Astronomical Ob.ervatory Volgina 7 11160 Belgrade 74 Serbia

We present the orb.ts of ten visual b.nary stars： WDS 01015＋6922, WDS 01424- 0645, WDS 01461 ＋6349, WDS 04374-0951, WDS 04478＋5318, WDS 05255-0033, WDS 05491＋6248, WDS 06404＋4058, WDS 07479-1212, and WDS 18384＋... 详细信息

关键词： b.naries visual

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ON A CLASS OF KTHE SEQUENCE SPACES WITH NORMAL STRUCTURE

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Acta Mathematica Scientia 2011年第2期31卷 576-590页

作者： b. Zlatanov Department of Mathematics and Informatics Plovdiv University

In this note, we investigate the generalized modulus of convexity δ（λ） and the generalized modulus smoothness p（λ）. We ob.ain some estimates of these moduli for X=lp. We ob.ain inequalities b.tween WCS coefficient of a KSthe sequence space X and δX（λ）. We show that, for a wide class of class the sequence spaces X, if for some ε∈（0, 9/10] holds δx（e）〉 1/3（1- √3/2）ε, then X has normal structure.

关键词： Weakly convergent sequence coefficient modulus of convexity generalizedmodulus of convexity normal structure

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b.nding characteristic of a cantilevered magnetostrictive film-sub.trate system

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Science China(Technological Sciences) 2007年第4期50卷 454-461页

作者： b. Narsu Institute of Science and Technology Inner Mongolia University

The b.nding prob.em of a film-sub.trate cantilever with arb.trary film-to-sub.trate thickness ratio is solved exactly b. employing the force equilib.ium equation, and then the optimization and application of the b.nding characteristic of the magne-tostrictive cantilever is discussed. Furthermore, the influence of geometrical and physical parameters of the two cantilever components on the maximum free-end deflection of the cantilever is addressed. The results indicate that as the sub.trate thickness is kept constant, the greater film-to-sub.trate stiffness ratio will induce a larger deflection, while for the case of fixed total cantilever thickness, the optimal cantilever deflection is independent of the physical parameters of the materials such as Young’s modulus and Poisson’s ratio.

关键词： magnetic film-sub.trate system cantilever deflection sensors

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Injection of N-Radicals into Diesel Engine Exhaust Treated b. Plasma for Improved NO_x Removal: A Feasib.lity Study

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Plasma Science and Technology 2006年第2期8卷 202-206页

作者： b. S. RAJANIKANTH b. R. SUSHMA Dept. of High Voltage Engineering Indian Institute of Science Bangalore 560012 India

Reported in this paper is a feasib.lity study on the injection of plasma induced N radicals for the ab.tement of NO and NOx present in the actual diesel exhaust. The radical laden diesel exhaust was further treated b. discharge plasma in a dielectric b.rrier discharge reactor. N radicals were produced in a separate plasma reactor filled with b.TiO3 pellets and were then injected into the treatment zone, There was a significant improvement in the efficiency when the radicals were injected compared to that when there was no radical injection. The efficiency of NOx removal at 0 load with plasma alone was 14% whereas with the injection of N radicals it went up to 38%, The results of the experiments conducted at different loads are discussed,

关键词： N-radical diesel engine exhaust NOx removal plasma treatment

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Perturb.tion and variational approach for the equation of state for hard-sphere and Lennard-Jones fluids

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Chinese Physics b 2012年第4期21卷 383-395页

作者： S. b. Khasare Department of Physics Science College Congress Nagar Nagpur India

The present work uses the concept of a scaled particle along with the perturb.tion and variation approach, to develop an equation of state （EOS） for a mixture of hard sphere （HS）, Lennar-Jones （L J） fluids. A suitab.e flexib.e functional form for the radial distrib.tion function G（R） is assumed for the mixture, with R as a variab.e. The function G（R） has an arb.trary parameter m and a different equation of state can b. ob.ained with a suitab.e choice of m. For m = 0.75 and m = 0.83 results are close to molecular dynamics （MD） result for pure HS and LJ fluid respectively.

关键词： equation of state Lennard-Jones potential hard-sphere potential liquid mixture com- puter simulation

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A comprehensive analysis of various structural parameters of Indian coals with the aid of advanced analytical tools

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International Journal of Coal Science & Technology 2016年第2期3卷 123-132页

作者： b. Manoj Department of Physics Christ University BangaloreKarnataka 560027 India

An exhaustive structural analysis was carried out on three Indian coals （ranging from sub.b.tuminous to high volatile b.tuminous coal） using a range of advanced characterization tools. Detailed investigations were carded out using UV-Visib.e spectroscopy, X-ray diffraction, scanning electron microscopy coupled energy dispersive spectroscopy, Raman spectroscopy and Fourier transform infrared spectroscopy. The X-ray and Raman peaks were deconvoluted and analyzed in details. Coal crystallites possess turb.stratic structure, whose crystallite diameter and height increase with rank. The tJdC ratio plotted against aromaticity exhib.ted a decreasing trend, confirming the graphitization of coal upon leaching. It is also found that, with the increase of coal rank, the dependency of I20/I26 on La is saturated, due to the increase in average size of sp2 nanoclusters. In Raman spectra, the ob.erved G peak （1585 cm^-1） and the D2 b.nd arises from graphitic lattices. In IR spectrum, two distinct peaks at 2850 and 2920 cm i are attrib.ted to the symmetric and asymmetric -CH2 stretching vib.ations. The intense peak at - 1620 cm^-1, is either attrib.ted to the aromatic ring stretching of C=C nucleus.

关键词： Coal structure Spectroscopic tools X-ray diffraction Graphene layers

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