K[x_1,x_2;x_1~(-1),x_2~(-1)]上的分次扩张

设V是域K上的一个全赋值环,B1=i∈ZAi,0Xi1,B2=j∈ZA0,jXj2分别是K[x1,x-11],K[x2,x-12]上V的分次扩张,令A=i,j∈ZAi,jXi1Xj2是K[x1,x2;x-11,x-12]的一个子集,本文对K[x1,x2;x-11,x-12]中V的分次扩张进行了刻画。对B1、B2的所有可能的情形,本文证明了A的存在性,并讨论了B1、B2在若干条件下,A的唯一性。     

迭代序列x_(n+1)=(α+βx_(n-k))/(1+sum from i=1 to k x_(n-i+1)~γ)的全局性质

通过函数f(x)=(α+βx)/(1+kxγ)在[0,+∞)上的单调性,并利用上下极限方法得到了非线性差分方程x_(n+1)=(α+βx_(n-k))/(1+sum from i=1 to k x_(n-i+1)~γ)正平衡点的全局吸引性,同时还得到正振动解的半循环分布.其中α>0,0<β<1,0<γ≤1,k∈N,x-k…x0是任意非负实数.     

A COGNITIVE AND MEMETIC SCIENCE APPROACH TO ANALYZE THE HUMAN FACTORS IN PREDICTING THE EVOLUTION OF PAPER TECHNOLOGY AND PRODUCTS IN THE 21~(sT) CENTURY

21世纪制纸技术、纸制品进化之予测的有关人类要素分析的认识科学和文化遗传基因科学的方法     

范式dk=a_1x_1+a_2x_2+…+a_nx_n的解法

令d,a_1,…,a_n为非负整数,K是使(1)dk=a_1X_1+a_2X_2+…+a_nX_n,X_i≥0,i=1,…,n成立的最小正整数.(1)式叫做d关于a_1,a_2,…,a_n的范式,简称n元范式.在文[1]、文[2]中,对n=2的情形,给出了范式的解法.本文在此基础上,解决n(>2)元范式的解法.     

B_s→μ~+μ~-对LHC寻找Higgs粒子的影响

研究在各种实验限制下CMSSM参数空间,尤其是以双比率R形式探讨Bs→μ+μ-的限制,并讨论了该参数空间的唯象学性质.得出在30fb-1积分亮度下,LHC只能发现一个与标准模型Higgs粒子性质非常相似的粒子(即通常文献所言Lone Higgs Scenario)这一重要结论.     

关于不定方程x_1+x_2+…+x_k=n的整数解的组数

本文用初等方法给出不定方程 X_1+X_2+…+x_(?)=-n 满足某(?)特殊条件时的整数解的计算公式。     

HOMOPOLYMERS AND COPOLYMERS OF GLYCOLIDE AND LACTIDE

The homopolymerization and copolymerization of glycolide (GA) and lactide (LA) are des-cribed. The resulting polymers are characterized by differential scanning calorimetry (DSC),thermogravimetric analysis (TGA), 300 MHz proton nuclear magnetic resonance spectroscopy(NMR), infrared spectroscopy, and X-ray diffraction. The rheological properties of PGA andPGLA 910 are evaluated by shear experiments. The biodegradation has been studied in vivo. Theresults show that the polyesters can be absorbed by the muscles of rabbits after 60 days.     

在LH模型下研究e~+e~-→τ~+μ~-过程

最小Higgs模型(LH模型)中由于镜像轻子和标准模型(SM)轻子之间存在味改变耦合,会对τ+μ-Z(γ)顶角产生单圈贡献,从而使e~+e~-→τ~+μ~-过程的截面增加,这一效应能被实验探测到.利用LH模型研究了e~+e~-→τ~+μ~-过程,在Mathematica 7.0中通过调用High Energy Physics和Loop Tools,经过复杂计算得到其截面σ.通过这类过程探讨LH模型的效应.     

PREPARATION AND CHARACTERISATION OF HYDROPHOBIC AND CATIONIC MONTMORILLONITE

INTRODUCTIONDuring mechanical pulping, lipophilic extractives, mainly comprising fatty acids, rosin acids and esters, are often released from wood chips into pr℃ess waters as dispersed colloidal substances. These colloidal substances must be controlled and maintained at a low level, otherwise they often cause various problems in the papermaking pr℃ess as well as in the final product, e.g. deposits on pr℃essing equipment [1,2]. Using highly cationic fixatives may help to reduce the pro…     

THEORETICAL STUDY OF THE ELECTRONIC STRUCTURE AND CONDUCTING PROPERTIES OF POLYTHIIRENE AND POLYDITHIETE

The electronic structure and conduction properties of two kinds of polyyne derivatives with sulfur addition, palythiirene (PTI) and polydithiete (PDT) have been examined using ab initio Hartree-Fock crystal orbital method. Comparison of the results such as energy gap ? ionization-potential and electron affinity of PTI and PDT with those of polyacetylene (PA) indicates that both PTI and PDT have smaller band gaps than PA and they are better intrinsic semiconductors than PA. The π electron of sulfur atoms partly transport to conjugated polyyne chain.     

SYNTHESIS OF ELECTROPOLY MERIZABLE AND

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SYNTHESIS AND CHARACTERIZATION OF MONOVALENT AND MIXED-VALENCE COMPLEXES OF COPPER WITH 2-THIOURACIL

Five polynuclear monovalent and mixed-valence complexes of copper with 2-thiouracil were synthesized. They were characterized by the molar conductivity, electromc spectra, infrared spectroscopy, thermogravimetric and magnetic susceptibility measurements. Their coordination properties and tentative structures were discussed.     

EFFECTS OF CRC SIMULACRUM MADE OF OLEIC ACID AND GLYCERIDE ON WET-END AND PAPER PROPERTIES OF NEWSPRONT

INTRODUCTIONMechanical pulp is the main furnish of newsprint. Unfortunately there are much more extractives in mechanical pulp than in other pulps such as Kraft. Extractives are often used to refer to the nonstructural components of wood and bark. Most extractives are organic solvents, including polyphenols, terpenoids, fats, waxes, organic acids, complex polysaccharides and nitrogenous compounds. The amount of extractives and their composition vary with respect to the botanical families…     

PROBING INTO DEVELOPMENT OF SHORE OIL AND GAS RESOURCES AND DISTRIBUTION OF PETROLEUM INDUSTRY OF LIAONING PROVINCE

Oilindustryisapillarestateinnationaleconomy,whichoccupiesadevisiveposition.ExploitingMarineoilandgasresourcesextendseconomyfromthelandtotheocean.marineoilindustryisakindofnewmarineestate.Thedevelopmentofmarineoilandgasresourcescandevelopesomeestatesinterrelated,opennewbases,enlargeemploymentopportunity,lysistenseconditionofenergy,promotescientificandtechnologicaladvance.Littoralzoneofliaoningprovinceisrichinoilandgasresources,whichiscomposedofLiaoRiverdeltaandthepartextendingtotheseaandLiaod…