Dynamics of selfavoiding tethered membranes. I. Model A dynamics (Rouse model)

The dynamical scaling properties of selfavoiding polymerized membranes with internal dimension D are studied using model A dynamics. It is shown that the theory is renormalizable to all orders in perturbation theory and that the dynamical scaling exponent z is given by . This result applies especially to membranes (D=2) but also to polymers (D=1). Received: 5 September 1997 / Accepted: 17 November 1997     

BV Structure of the Cohomology of Nilpotent Subalgebras and the Geometry of(W) Strings

Given a simple, simply laced, complex Lie algebra corresponding to the Lie group G, let be thesubalgebra generated by the positive roots. In this Letter we construct aBV algebra whose underlying graded commutative algebra is given by the cohomology, with respect to , of the algebra of regular functions on G with values in . We conjecture that describes the algebra of allphysical (i.e., BRST invariant) operators of the noncritical string. The conjecture is verified in the two explicitly known cases, ₂ (the Virasoro string) and ₃ (the string).     

流体的塔阱状态方程及其对迁移性质的推算

流体的塔阱状态方程及其对迁移性质的推算曾向东，严家（哈尔滨工业大学能源科学与工程学院哈尔滨１５０００６）牛文科，韩立中（哈尔滨船舶锅炉涡轮机研究所哈尔滨）关键词势能模型，配分函数，状态方程，平衡性质，迁移性质１流体的塔阱状态方程Ｐｒｉｇｏｇｉｎｅ认为...     

ICP－AES测定核纯海绵锆中17个杂质元素方法的研究

应用ＩＣＰ－ＡＥＳ法，对核纯海绵锆中１７个杂质元素的测定进行了试验研究。取样量１００ｍｇ时，Ａｌ、Ｃａ、Ｃｏ、Ｃｒ、Ｃｕ、Ｆｅ、Ｍｇ、Ｍｎ、Ｍｏ、Ｎｉ、Ｐｂ、Ｓｎ、Ｔａ、Ｔｉ、Ｖ、Ｙ和Ｚｎ的测定范围是１０μｇ／ｇ—３２００μｇ／ｇ。回收率为９５．２％—１０６．５％。     

高能强子在铁中的衰减

利用强子探测效率高的厚型甘巴拉山铁乳胶室,观测了能量大于4TeV强子流的衰减长度.分别对无伴随的单个强子、ΣE_γ>500TeV、100TeV≤ΣE_γ≤500TeV和30TeV≤ΣE_γ<100TeV的族事例中的强子作了测量. 初步结果表明,四种情况的衰减长度是有差异的,对此作了讨论.     

斜入射泵浦等离子体状态研究

 研究了作用在靶介质上的斜入射泵浦激光,对产生的靶等离子体状态以及激光增益区的影响。研究结果表明,等离子体状态和激光增益区随入射角θ0 (20(变化而变化。当θ0≤20°时这种变化不大。当θ0约30°时等离子体状态和激光增益区有比较明显的变化。当θ0≥40°时, 状态有很大的变化,严重影响激光增益和放大。     

双参数形变谐振子湮没算符高次幂本征态的量子统计性质

研究双参数形变谐振子湮没算符高次幂本征态的量子统计特性. 结果表明, 当k为偶数时它们都可存在N次方压缩; 并且它们均可呈现反聚束效应.     

Simultaneous Brownian motion of N particles in a temperature gradient

A system of N Brownian particles suspended in a nonuniform heat bath is treated as a thermodynamic system with internal degrees of freedom, in this case their velocities and coordinates. Applying the scheme of nonequilibrium thermodynamics, one then easily obtains the Fokker-Planck equation for simultaneous Brownian motion of N particles in a temperature gradient. This equation accounts for couplings in the motion as a result of hydrodynamic interactions between particles.     

Eigenvalues of the k‐th power of a graph

The k‐th power of a graph G, denoted by , is a graph with the same set of vertices as G such that two vertices are adjacent in if and only if their distance in G is at most k. In this paper, we give the bounds on the spectral radius of and . The Nordhaus–Gaddum‐type inequality for the spectral radius of the graph is also presented. Moreover, we obtain an upper bound on the energy of the second power of graphs.