江苏宿迁220kV变电站隔震设计方法研究

为解决变电站抗侧刚度较小,大型设备会放大地震作用的问题,对宿迁220kV变电站结构分别采用分部设计和一体化设计两种方法进行隔震设计,对支座参数确定原则、地震波选取规则、楼层响应以及非比例阻尼影响规律进行了研究分析。结果表明,应采用实际地震作用下迭代得到的支座参数,以迭代得到的隔震层阻尼比作为结构阻尼比选取地震波更合理,一体化设计方法可以在实现中震弹性目标要求的同时将构件进行优化,提高结构经济性,变电站隔震结构非比例阻尼特性较强,且对其楼层响应结果影响较大,实际隔震设计中不可忽略非比例阻尼影响,高烈度地区的变电站更宜采用一体化设计方法。

内燃机气缸内孔分区异化激光微织构技术研究

根据气缸内孔不同区域的磨损特征,对缸套内壁进行分区并设计三种缸套内壁激光微织构方案。通过工艺试验确定激光微织构加工参数,并对缸套进行实际激光微织构加工,研究了气缸内孔分区异化激光表面微织构技术(laser surface micro-texturing,LST)对内燃机综合性能的影响。发动机台架性能试验表明:与原机相比,配装三种激光微织构缸套的柴油机燃油消耗率均有不同程度降低,机油消耗率最大降幅达45.5%。研究结果表明:采用缸套上止点区与裙部主接触区复合微织构方案可显著提高柴油机的综合性能。

分块抛掷法——定向爆破堆坝形状设计

本文发现爆破岩石裂口开度与抛掷石块动能成比例,且这两个参数为常数,使得复杂的堆积形状计算简化。本文按抛物线计算石块落点,按摩擦力计算石块滑动距离,提出了分块计算堆积体绘制三视图的精确方法。

Designing of an all-optical time division multiplexing scheme with the help of nonlinear material based tree-net architecture

In the field of optical interconnecting network and in super fast photonic computing system, the tree architecture and optical nonlinear materials can play a significant role. Nonlinear optical material may find important uses in optical switching. Optical switch using nonlinear material makes it possible for one optical signal to control and switch another optical signal through nonlinear interaction in a material. In this communication such materials have been successfully exploited to design an all-optical tree-net architecture, which can be utilized for time division multiplexing scheme in all-optical domain.

陶瓷工业振动流化床干燥装置优化设计

振动流化床干燥是陶瓷干法造粒过程的一个重要操作单元。针对卧式多室振动流化床干燥装置能量利用率不高、耗能较大等问题,基于陶瓷原料在振动流化床干燥中的动力学模型、传热方程及热平衡方程,建立了陶瓷原料干燥所需热量在振动流化床干燥机长度方向上变化的数学模型。该模型表明,干燥过程所需热量沿多孔板长度方向减少。因此讨论了在多孔板长度方向底部用隔板隔开不同区域进行不等温进气,实验结果表明符合数学模型,分区供热方式可降低陶瓷原料干燥过程能耗,成品质量符合陶瓷工业干粉造粒要求。

Constructions for Anonymous Secret Sharing Schemes Using Combinatorial Designs

In an anonymous secret sharing scheme the secret can be reconstructed without knowledge of which participants hold which shares. In this paper some constructions of anonymous secret sharing schemes with 2 thresholds by using combinatorial designs are given. Let v（t, w, q） denote the minimum size of the set of shares of a perfect anonymous （t, w） threshold secret sharing scheme with q secrets. In this paper we prove that v（t, w, q） - Θ（q） if t and w are fixed and that the lower bound of the size of the set of shares in [4] is not optimal under certain condition.

Incomplete Group Divisible Designs with Block Size Four and General Index

In this paper, we investigate the existence of incomplete group divisible designs （IGDDs） with block size four, group-type （g, h） u and general index λ. The necessary conditions for the existence of such a design are that u ≥ 4, g ≥ 3h, λg（u 1） ≡ 0 （mod 3）, λ（g h）（u 1） ≡ 0 （mod 3）, and λu（u 1）（g 2 h 2 ） ≡ 0 （mod 12）. These necessary conditions are shown to be sufficient for all λ≥ 2. The known existence result for λ = 1 is also improved.

非财务指标融入分部经理激励契约设计的研究

通过问卷调查的方式,研究了分部经理间战略协同程度、分部经理关于分部的私人信息数量、分部经理对分部短期财务业绩的影响以及分部经理对分部长期财务业绩回报的影响四个因素在分部经理契约设计中确定非财务指标权重的作用。研究发现,分部间的战略协同程度越高,分部经理激励契约中的非财务指标权重就越高;分部经理关于分部的私有信息越多、分部经理对分部短期财务业绩的影响越大,分部经理激励契约中非财务指标的权重就越低。这一研究结果为现有关于非财务指标的理论研究提供了实证证据,也对分部经理的契约设计有一定的启发意义。

烈性传染病医院设计初探——上海市公共卫生中心的设计实践与思考

通过对上海市公共卫生中心设计实践和工程实施的分析与介绍,从功能分区、防护隔离、病房设计、医院环境、人性化设计等多方面对烈性传染病医疗综合体的设计与功能组织进行了探讨,以求为传染病医院设计的发展提供参考。

Frame Self-orthogonal Mendelsohn Triple Systems

A Mendelsohn triple system of order v,MTS(v)for short,is a pair(X,B)where X is a v-set(of points)and B is a collection of cyclic triples on X such that every ordered pair of distinct points from X appears in exactly one cyclic triple of B.The cyclic triple(a,b,c)contains the ordered pairs(a,b),(b,c)and(c,a).An MTS(v)corresponds to an idempotent semisymmetric Latin square (quasigroup)of order v.An MTS(v)is called frame self-orthogonal,FSOMTS for short,if its associated semisymmetric Latin square is frame self-orthogonal.It is known that an FSOMTS(1~n)exists for all n≡1(mod 3)except n=10 and for all n≥15,n≡0(mod 3)with possible exception that n=18.In this paper,it is shown that(i)an FSOMTS(2~n)exists if and only if n≡0,1(mod 3)and n>5 with possible exceptions n ∈{9,27,33,39};(ii)an FSOMTS(3~n)exists if and only if n≥4,with possible exceptions that n ∈{6,14,18,19}.

Super-simple （5, 4）-GDDs of group type g^u

In statistical planning of experiments, super-simple designs are the ones providing samples with maximum intersection as small as possible. Super- simple group divisible designs are useful in constructing other types of super- simple designs which can be applied to codes and designs. In this article, the existence of a super-simple （5, 4）-GDD of group type gU is investigated and it is shown that such a design exists if and only if u ≥ 5, g（u - 2） ≥ 12, and u（u - 1）g^2≡ 0 （mod 5） with some possible exceptions.

Existence of Three HMOLS of Type 2~nu^1

A Latin squares of order v with ni missing sub-Latin squares （holes） of order hi （1 〈= i 〈 k）, which are disjoint and spanning （i.e. ∑k i=l1 nihi = v）, is called a partitioned incomplete Latin squares and denoted by PILS. The type of PILS is defined by （h1n1 h2n2…hknk ）. If any two PILS inaset of t PILS of type T are orthogonal, then we denote the set by t-HMOLS（T）. It has been proved that 3-HMOLS（2n31） exist for n ≥6 with 11 possible exceptions. In this paper, we investigate the existence of 3-HMOLS（2nu1） with u ≥ 4, and prove that 3-HMOLS（2~u1） exist if n ≥ 54 and n ≥7/4u ＋ 7.

CONSTRUCTING SELF-CONJUGATE SELF-ORTHOGONAL DIAGONAL LATIN SQUARES

In this paper, we give some constructions of self-conjugate self-orthogonal diagonal Latinsquares (SCSODLS). As an application of such constructions we disproof the conjecture aboutSCSODLS and show that there exist SCSODLS of order V, whenever w=1 (mod 12), with thepossible exception of v∈ {13, 85, 133}.