BL代数的一种弱化形式

在对BL 代数及其相关逻辑代数研究的基础上, 通过加强MTL-代数条件的方法建立BL-代数的一种弱化形式--WBL-代数, 并给出WBL-代数结构的实例; 证明BL 代数是WBL 代数, 并通过实例说明WBL-代数是BL-代数的真弱化形式, 且是MTL-代数的真加强形式; 在MTL-代数的基础上给出WBL-代数的一些特征定理.     

法式tubular代数与仿射Kac-Moody代数

彭联刚-肖杰等利用有限维遗传代数A的根范畴的Ringel-Hall李代数实现所有可对称化Kac-Moody代数,其中Ringel-Hall李代数的李乘不完全由Hall积提供.本文通过新方法实现仿射Kac-Moody代数,李代数L(A)1C/I的李乘完全由Hall积给出.对任意D4(1),E6(1),E7(1)或E8(1)型扩张Dynkin图Δ,在型为Δ的法式tubular代数A的退化合成李代数L(A)1C上构造它关于一个具体李理想I的商代数L(A)1C/I,证明商代数L(A)1C/I同构于对应的Δ型仿射Kac-Moody代数.这将有助于利用法式tubular代数的模范畴研究仿射Kac-Moody代数.     

关于Griss代数的伴随半群

本文证明了Griss代数X作成正蕴涵且具有条件(S)的BCK一代数当且仅当X是正则的Griss代数;进一步给出了BCK一代数作成Griss代数的半群刻划.     

仿射Schur代数SΔ(2，3）Q的生成元与关系式

利用从普遍包络代数到仿射Schur代数之间的关系,给出了仿射Schur代数SΔ(2,3)Q的表现,即生成元与关系式.这个表现是通过在普遍包络代数的表现上额外增加一些关系式得到的.     

广义TKK代数的一类Boson表示

研究对应于欧式空间中非格半格S的Tits-Kantor-Koecher(TKK)李代数g(T(S))的泛中心扩张广义TKK代数g(T(S))的一类Boson场表示.首先将广义TKK代数g(T)的结构等式表示为一系列形式幂级数等式,然后利用关于量子环面上gln型李代数的顶点表示及由群代数与对称代数组成的Fock空间,构造一组作用于Fock空间的顶点算子.最后,证明这些顶点算子在这Fock空间上给出了广义TKK代数g(T)的一个Boson场顶点表示.     

关于PMS-代数的同余格的一点注记

分别给出了Stone代数和PMS-代数中主同余关系的其它一些特征.特别地,证明了PMS-代数(S;∨,∧,*,,0,1)的同余格与所含MS-代数(S;∨,∧,,0,1)的同余格是一致的.     

一类TKK代数的Bosonic表示

设S是Rn中"最小"的半格,在一个Jordan代数J(S)的基础上,通过所谓的Tits-Kantor-Koecher方法可构造TKK代数T(J(S)).首先给出了由任意一个量子环面Cq得到的李代数gl2(Cq)上的一个Bosonic表示,通过将TKK代数T(J(S))嵌入到一个特殊的量子环面对应的李代数gl2(Cq)中,得到了TKK代数T(J(S))的一个Bosonic表示.而且,也得到了这个TKK代数T(J(S))的表示的一个忠实的子表示.     

BR_0代数与FI代数的关系

研究了模糊命题演算形式演绎系统L*和与之在语义上相匹配的R0代数,以及基础R0代数和基础L*系统,提出了BR0代数的简化形式的概念,讨论了BR0代数与FI代数的相互关系.     

关于CFI代数

对可交换FI代数(简称CFI代数)的特征进行系统研究,获得(正则)FI代数和CFI代数的一些新的性质;探讨CFI代数与HFI代数、格蕴涵代数及R0代数等逻辑代数之间的关系,得到CFI代数成为正则HFI代数的一个充分必要条件.     

广义TKK代数的一类模结构

设S是欧氏空间R″（υ≥1）中最小的非格半格,在一个Jordan代数T（S）的基础上,通过Tits-Kantor-Koecher方法可构造TKK李代数g（T（S））,研究该李代数的泛中心扩张广义TKK代数g（T（S））,的一类在群代数与对称代数上的不可约表示。     

Prescribing symmetric scalar curvature onS 2

The problem of prescribing scalar curvature in S2 is discussed, and the solvability of the e-quation - Δu + 2-Reu = 0 on S2, is given, where R∈C0(S2). It is known that there are some obstructions . Some new results are given by seeking a solution of the minimax type. For example, supposing that R is G symmetric and is constant on the set of fixed points on S2 under G (where G is a subgroup of O(3)), It is proved that the equation is solvable if and only if R is positive somewhere.     

Expression of self-incompatibility ribonucleases of Antirrhinum inEscherichia coli

Self-incompatibility is an intraspecific reproductive barrier to prevent self-fertilization in the flowering plants. In many species, self-incompatibility is controlled by a single S locus with multiple alleles. So far, the only gene known in theS locus of the Solanaceae, Scrophulariaceae and Rosaceae encodes a class of ribonucleases, called self-incompatibility ribonucleases (S RNases), which have been shown to mediate stylar expression of self-incompatible reaction. As the first step to investigate their three-dimensional structure, we successfully expressed three biologically active S RNases of Antirrihnum (S ₂,S ₄ andS ₅) inEscherichia coli (E. coli). Their functional expressions caused no detrimental effect on host bacteria growth and provided a basis for a large scale preparation of S RNase proteins. Possible reasons for non-lethality of S RNases onE. coli are discussed.     

Thermodynamic determination of fragility in La-based glass-forming liquid

Differences in the thermodynamic functions between the liquid and crystalline states of La-based bulk metallic glasses alloys were calculated with the specific heat capacity Cp and the fusion heat ΔHf,which we measured. Fragility indexes having different thermodynamic definitions were calculated from the temperature dependence of excess entropy ΔSliq-cry. It is ambiguous for La-based glass-forming liquid to evaluate fragility from the intercepts of ΔSliq-cry-temperature curves. We found that the thermodynam...     

On the largest linear span of binary sequences with period p 2 from interleaved construction

Let S be a family of binary sequences constructed from interleaved construction. The linear spans of binary sequences in S are studied in this paper. In order to achieve the largest linear span, a criterion is presented for the base sequences with periodp, where p is a prime and 2 is a primitive root modulop2. It is shown that any sequence in S has the largest linear span under the criterion. Moreover, such base sequences can be chosen easily.     

An Improved Genetic Algorithm for Problem of Genome Rearrangement

In view of the fact that the problem of sorting unsigned permutation by reversal is NP-hard, while the problem of sorting signed permutation by reversal can be solved easily, in this paper, we first transform an unsigned permutation of length n,π （π1 ,… ,πn）, into a set S（π） containing 2^n signed permutations, so that the reversal distance of π is equal to the reversal distance of the optimal signed permutation in S（π）. Then analyze the structural features of S（π） by creating a directed graph and induce a new computing model of this question. Finally, an improved genetic algorithm for solving the new model is proposed. Experimental results show that the proposed model and algorithm is very efficient in practice.     

A Large Deviation Principle for the Risk Process with Varying Premium

Let u ∈ R ,for any ω 〉 0, the processes X^ε = {X^ε（t）; 0 ≤ t≤ 1} are governed by the following random evolution equations dX^ε（t）= b（X^ε（t）,v（t））dt-εdSt/ε, where S={St; 0≤t≤1} is a compound Poisson process, the process v={v（t）; 0≤t≤1} is independent of S and takes values in R^m. We derive the large deviation principle for{（X^ε,v（.））; ε〉0} when ε↓0 by approximation method and contraction principle, which will be meaningful for us to find out the path property for the risk process of this type.     

Identification and field evaluation of the sex pheromone of an invasive pest,the fall webworm <Emphasis Type="Italic">Hyphantria cunea</Emphasis> in China

Pheromone gland extracts of the fall webworm, Hyphantria cunea （Lepidoptera： Arctiidae） were analyzed by gas chromatography （GC） and gas chromatography-mass spectrometry （GC-MS）. Based on comparison of retention times and mass spectra of synthetic standards, four compounds were identified as （9Z,12Z）-octadecadienal, （9Z,12Z,15Z）-octadecatrienal, （3Z,6Z,9S, 10R）-9,10-epoxy-3,6-heneico- sadiene and （3Z,6Z,9S,10R）-9,10-epoxy-1,3,6-heneicosatriene with a ratio of 2：33.6：58.4：6. Trapping tests showed that quaternary blend of these compounds was highly attractive to male H. cunea. Unitraps baited with the quaternary blend loading of 200-300 μg on a gray rubber septum were very effective for monitoring H. cunea populations.     

The Total Irredundance Numbers on Graphs

This paper discusses the total irredundance relations between the graph G and its clone-contraction graph H, that is, let H be the clone-contraction graph of G and v1,v2,...,vk be all contraction vertices ofH. IfS is a maximal total irredundant set of H such that A = S ∩ {V1,V2,…,Vk} contains as few vertices as possible, then S＇= S-A is the maximal total irredundant set of G. Furthermore, we obtain the bound of the total irredundance A（G） number： irt ≤△（G）/2△（G）＋1 n, which n is the order of graph G, and △（G） is maximum degree in G.     

碱土金属卤化物理化性质QSPR的研究

根据无机物成键原子的结构特征,提出用新的方法：δi^S=（mizi＋ziEi）/2ninj来计算无机分子中原子特征值δi^S,构建新的拓扑指数^mS.用^0S、^1S作为分子结构特征描述符,通过Statistica5.0软件进行多元线性回归,按照标准偏差取最小,相关系数取最大的原则,建立碱土金属卤化物的物理化学性质Pi与分子结构描述符（^0S、^1S）之间的定量相关方程,并对相关关系进行显著性检验.结果表明,新的拓扑指数对分子结构选择区分性高,具有比较高的相关性和精度,并且计算简便,物理意义明确,建立的各种方程得出的各种物理化学性质预测值与实验值之间能很好地吻合,比其他文献方法更具有广泛性.