Stability of iterative processes with errors for a system of nonlinear -accretive variational inclusions in Banach spaces

In this paper, by using the concept of (A,η)-accretive mappings and the new resolvent operator technique associated with (A,η)-accretive mappings, we introduce and study a system of general mixed quasivariational inclusions involving (A,η)-accretive mappings in Banach spaces, and construct a new perturbed iterative algorithm with mixed errors for this system of nonlinear (A,η)-accretive variational inclusions in q-uniformly smooth Banach spaces. Our results improve and generalize the corresponding results of recent works.     

4J29可伐合金材料低温热物性及弹性模量测试

为了研究4J29可伐合金的低温热物性和机械性能,为低温系统的设计、结构变形、力学稳定性、装调和光学校准等提供技术保障,分别选用"稳态纵向热流法"、"稳态法"测试了4J29可伐合金在77—300 K温区的热导率和比热容,采用弹性模量试验机测试了77—300 K温区的弹性模量系数。通过标准样品材料TC4对比及误差分析,证明热导率测量误差在9%以内,其它误差均控制在6%以内。     

Group path covering and distance two labeling of graphs

For a positive integer d, an L(d,1)-labeling f of a graph G is an assignment of integers to the vertices of G such that |f(u)−f(v)|?d if uv∈E(G), and |f(u)−f(v)|?1 if u and u are at distance two. The span of an L(d,1)-labeling f of a graph is the absolute difference between the maximum and minimum integers used by f. The L(d,1)-labeling number of G, denoted by λd,1(G), is the minimum span over all L(d,1)-labelings of G. An L^′(d,1)-labeling of a graph G is an L(d,1)-labeling of G which assigns different labels to different vertices. Denote by the L^′(d,1)-labeling number of G. Georges et al. [Discrete Math. 135 (1994) 103-111] established relationship between the L(2,1)-labeling number of a graph G and the path covering number of Gc, the complement of G. In this paper we first generalize the concept of the path covering of a graph to the t-group path covering. Then we establish the relationship between the L^′(d,1)-labeling number of a graph G and the (d−1)-group path covering number of Gc. Using this result, we prove that and for bipartite graphs G can be computed in polynomial time.     

植物甾醇-共轭亚油酸酯对结肠癌细胞增殖的抑制作用

观察植物甾醇-共轭亚油酸酯对结肠癌HT-29细胞增殖的作用,探讨其可能的作用机制。采用体外培养结肠癌HT-29细胞的方法,施加不同浓度植物甾醇-共轭亚油酸酯(100、150、200、250、300μmol/L),观察对细胞增殖的影响。应用四唑盐比色法(MTT法)观察细胞增殖抑制情况,倒置荧光显微镜观察细胞形态学特征。结果显示,植物甾醇-共轭亚油酸酯各组较对照组增殖降低,且存在剂量-效应关系(100～300μmol/L)和时间-效应关系(24、48、72h),说明植物甾醇-共轭亚油酸酯抑制结肠癌HT-29细胞增殖。     

金属间化合物Sm_3(Fe_(1-x)V_x)_(29)的结构及其微观机制研究

利用X射线衍射,金相显微镜,能谱分析以及差示扫描量热(DSC)等手段对金属间化合物Sm3(Fe1-xVx)29(x=0.01,0.03,0.05,0.08,0.1)的结构及其微观机制进行了研究.结果表明,金属间化合物Sm3(Fe1-xVx)29(x=0.01,0.03,0.05,0.08,0.1)的结构均为3:29型结构,并且随V含量增加,金属间化合物Sm3(Fe1-xVx)29的晶格常数和晶胞体积V均呈减少趋势.当x>0.05时,金属间化合物Sm3(Fe1-xVx)29中的杂质相明显呈现出来.随着V含量的增加,居里温度(TC)呈单调上升趋势.     

HT-7托卡马克实验装置上基于PLC控制的中性束诊断电源系统

文章介绍HT-7托卡马克实验装置上的中性束诊断电源系统的组成、结构，以及基于S7-300PLC的逻辑控制系统。实验表明，该系统操作简单，性能稳定可靠。     

Synthesis and Characterization of Mesoporous Europium (Ⅲ) Silicate Molecular Sieves

The luminescent nanosized Eu-MCM (1:10) was synthesized by means of sol-gel-assisted self-assembly under basic conditions at room temperature. The results of 29Si-MAS NMR show that the peaks are Q4, Q3, Q2 [(SiO)4-mSi-(OH)m (m=0, 1, 2), at -δ111, -δ103, -δ90], and q3, q2, q1, q0 [(SiO)4-nSi-(O-Eu)n (n=1, 2, 3, 4 ), at -δ83, -δ72, -δ55, -δ47]. The result proves Eu3 doped Si-O framework. The HRTEM image shows that the regular uniform nanoparticles with a diameter of 15 nm possess large pore with Φ8 nm, which is consistent with the result of N2 adsorption. The patterns of selected-area electron diffraction, XRD, and pore-size distribution plot of Eu-MCM (1:10) show that the sample of Eu-MCM (1:10) possesses the both of crystal and amorphous phases. The FT IR results indicate that the peaks near 970 cm-1 are assigned to the deformation vibration of silanol group. The as-product was calcined at 800 ℃ and the mesoporous material possesses enormous specific areas and large pores, which shows that the mesoporous material is ultrastable.     

Effect of substrate flexibility on dynamic wetting: a finite element model

Dynamic wetting plays an important role in coating processes. In this paper, we present a new finite element formulation that can predict the effect of substrate deformation on the location of the dynamic contact line. Our model solves for the fluid-structural interactions between an elastic solid and a viscous liquid with a dynamic contact line that can move across the deformable solid surface. Surface tension forces acting at the dynamic contact line pull outwards on the substrate and cause the formation of capillary ridge. To predict the shape of the capillary ridge and motion of dynamic contact line, our model uses arbitrary Lagrangian Eulerian (ALE) mesh motion in both fluid and solid phases, because ALE decouples the motion of solid and mesh points. In dynamic wetting of rigid solids it is known that a singularity arises at the dynamic wetting line due to a double-valued velocity. The singularity is often relieved by allowing a slip in a small contact region near the dynamic contact line. Dynamic wetting on flexible substrates involves a second singularity, which arises in the solid domain due to a line force acting at the contact line. The line force singularity is relieved by distributing the force over a finite contact region. Two ALE methods of mesh motion are implemented and compared. The variation of dynamic contact line position with respect to various parameters such as downstream pressure, contact angle, capillary number and elasticity number are presented for the finite element model and compared with an analytical model.     

HT-7托卡马克限制器温度数据的快速采集与管理方案

针对HT-7超导托卡马克实验的具体要求，对与等离子体直接接触的限制器表面温度实现了快速监测与存储、介绍了该微弱信号采集系统的具体实现方法与抗干扰措施。重点论述了一种基于VB6．0、组态软件、DDE(动态数据交换)及ODBC(开放数据库联接)技术的有效、灵活的采集方案．实现了实验数据的高频记录、按次自动存储和快速查询。