严重事故下堆舱空间氢气分布特性数值模拟

利用计算流体力学软件CFX分析了零方程模型和k-ε模型对氢气分布的影响,并对船用堆在典型失水诱发的严重事故下堆舱空间内的氢气分布特性进行了数值模拟。结果表明：在氢气释放阶段内,用k-ε模型模拟堆舱空间内的氢气分布更为合理;严重事故下的气体喷放期间,堆舱空间内各点处的压力变化基本一致,空间内的温度不会持续升高,氢气在堆舱空间内建立了比较明显的浓度梯度,堆舱顶部区域和破口附近区域氢气浓度都较高;氢气喷放结束后,堆舱空间内的平均水蒸气浓度不足以维持蒸汽惰性环境,堆舱空间内存在氢气燃烧的可能。研究结果为开展船用堆的氢气风险研究提供了基础。     

羽毛球风洞的设计与应用

本文根据空气动力学基本原理,对羽毛球的空气动力作了分析研究。设计了为评定羽毛球质量所需的羽毛球风洞。本文还提出一种羽毛球的风洞试验结果与运动员经验评定羽毛球质量的结果进行相关的方法。实践证明,该风洞在评定羽毛球质量方面,取得了十分满意的结果。     

TOPOLOGICAL DEGREE THEORY AND FIXED POINT THEOREMS IN PROBABILISTIC METRIC SPACES

The Leray-Schauder topological degree theory is established in the probabilistic linearnormed spaces.Based.on this theory,some fixed point theorems for mappings in theprobabilistic linear normed spaces are shown.     

Nonlinear semigroups and differential inclusions in probabilistic normed spaces

I.IntroductionTheconceptofaccretivemappingsisoffundamentalimportanceinthetheoryofsetvaluednonlinearoperators,differentialequationsandpartialdifferentialequationsinBanachspaces,whichwasintroducedindependentlybyF.E.Browdert31andT.Katolll].Ontheotherhand,manyauthorshavedoneconsiderableworkonsemigroupsofnonlinearcontractions,differentialequationsandevolutionequationsinBanachspacesandHilbertspaceal"='4'?.8.l:,13j.Recently,theauthorsintroducedtheconceptofaccretivemappingst"andsomeelementaryprope…     

Degree theory for multivalued (S) type mappings and fixed point theorems

The main purpose of this paper is devoted to generalizing the results of Browder ^[1,2]. This paper consists of four parts. In the first part, we introduce the concepts of multivalued (S) and (S) type mappings and the concepts of the limits of multivalued (S) and (S) type mappings. These kinds of mappings contain many monotone type mappings, such as maximal monotone mapping, bounded pseudo-monotone mapping and bounded generalized pseudo-monotone mapping, as its special cases. In the second part we define the pseudo-degree for (S) type mapping and the degree for (S) ₊ type mapping. These two kinds of degrees are all the generalizations of the degree defined by Browder ^[1,2].As applications, we utilize the degree theory presented in part 2 to study the existence of solutions for the multivalued operator equations (see part 3) and to obtain some new fixed point theorems in part 4.Research Supported by the National Natural Science Founation of China.     

Topological degree theory and fixed point theorems in probabilistic metric spaces

The Leray-Schauder topological degree theory is established in the probabilistic linear normed spaces. Based on this theory, some fixed point theorems for mappings in the probabilistic linear normed spaces are shown.The projects supported by National Natural Science Foundation of China.     

增生型映象方程研究的重合指数方法

本文建立了一种新方法——重合指数方法——来研究具多值增生映象方程解的存在性问题及微分包含解的存在性问题。     

分子筛锁笼催化剂的合成及其醛化活性

本文以三水三氯化铑为原料,经由二氯化一氯五氨合铑与分子筛进行阳离子交换及羰基化处理后,制得了Rh(CO)_x/13X 和Rh(CO)_x/NaY 型分子筛锁笼羰基铑络合物催化剂,并用于己烯—1,庚烯—1,辛烯—1,十二烯—1,及2,4,4—三甲基戊烯—1的醛化反应性能考察。实验表明,上述锁笼催化剂对直链烯烃在130℃和85kg/cm~2合成气压力下有高的醛化活性和选择性。催化剂在反应后易于和产物分离,并可在不作再生的条件下重复使用。Rh(CO)_x/NaY 催化剂在重复使用4次后,按反应共计生成的总醛量以及催化剂中的铑含量,算得这一催化剂的比活性为1.39×10~4克分子醛/克原子铑。这时的催化剂活性还很高,仍可继续使用。     

一类Krasnoselskii型不动点定理

本文给出两个新的不动点定理,其推广了著名的Krasnoselskii型的不动点定理及[6,7,9—11]中的某些近代的结果。     

EKELAND'S VARIATIONAL PRINCIPLE AND CARISTI'S FIXED POINT THEOREM IN PROBABILISTIC METRIC SPACE

The main purpose of this paper is to establish the Ekeland's variational principle andCaristi's fixed point theorem in probabilistic metric spaces and to give a direct simple proofof the equivalence between these two theorems in the probabilistic metric space. The resultspresented in this paper generalize the corresponding results of [9--12].