尖顶弯折三角翼气动特性研究

 对75°后掠三角翼在40%根弦处弯折引起的升阻特性及俯仰特性的 变化进行了低速风洞实验研究，初步分析了尖顶弯折对三角翼气动特性 的影响趋势. 得出尖顶弯折在低速大攻角下，可以使升力系数Cy增大、升阻比提高，并推迟失速攻角amax，从而说明顶部弯折对三角翼气动特 性的改善作用是显著的.     

掺杂偶氮化合物的PMMA光折变聚合物的拉曼光谱分析

光折变聚合物具有良好的光折变效应,采用以惰性聚合物PMMA为基体,掺杂偶氮化合物染料的光折变聚合物具有较好的光学非线性和稳定性。文章主要介绍使用激光拉曼光谱仪对合成聚合物的各单体和聚合物薄膜进行拉曼光谱扫描,对比分析各个单体成分的特征谱峰与聚合物薄膜特征谱峰,肯定了实验中得到的光折变聚合物薄膜与理论上要求得到的一致性。     

磁场和热辐射对可变表面热通量作用下的竖直圆锥体自然对流的影响

就圆锥体表面受到可变表面热通量作用,计及磁场和热辐射的综合影响,数值研究了流经竖直圆锥体的自然对流及其热交换特点.认为流体是灰色的、吸收-发射的辐射介质,而非散射介质,通过近似变换,将自由对流区中流动的边界层控制方程,简化为无量纲方程.利用Crank-Nicol-son形式的隐式有限差分法(具有收敛快、精度高、无条件稳定的特点),求解了无量纲的控制方程.得到了数值结果,以及空气和水中的速度、温度、局部和平均的壁面剪应力、局部和平均的Nusselt数.将所得到的结果与先前文献报道的结果进行比较,发现两者有着很好的一致性.     

A new theoretical-experimental model deriving from the contactless measurement of the thickness of bulge-tested elastomeric samples

In this paper, an ultrasound measurement method was applied to bulge test on carbon black-filled SBR specimens, in order to determine their thickness at the top of the dome. This method consists in measuring first the variation in the ultrasonic velocity as a function of the deformation in the uniaxial state and subsequently obtaining the thickness value in the equibiaxial state, assuming the congruence of velocity in uniaxial and equibiaxial stress states, respectively.The comparison between experimental data and the thickness values deriving from the most reliable theoretical criteria for both metallic and rubbers-like materials was shown.A new theoretical approach taking into account the slight compressibility of elastomers to estimate the thickness at the dome apex was proposed. Such an approach provided a general equation to define the thickness of the dome in bulge-tested SBR+20%CB as a function of the Poisson ratio.     

灰色GM[1,1,t~(1/2)]模型及在药动学中的应用

将灰色理论用于人体药物代谢动力学的研究 ,建立了一种新的灰色模型 GM 1 ,1 ,t ,适合于那些单峰形态的原始数据列 .并根据抗高血压药复方卡托普利片的血药浓度给出了灰色药物动力模型 .结果表明 ,精度优于传统的一室模型 ,而且所用参数少 ,便于计算 .灰色理论可用于药物动力学中单峰序列的研究 .     

激光动态外锥折射实验研究

根据双轴晶体的锥形折射效应，提出锥角可控的动态外锥折射以及一种实现外锥折射的新方法；选用ＫＮｂＯ３晶体进行实验，不仅观察到外锥折射，而且实现了锥角在０°～８°范围内的外锥折射扫描控制     

Extremal t‐apex trees with respect to matching energy

The matching energy of a graph is defined as the sum of the absolute values of the zeros of its matching polynomial. For any integer t≥1, a graph G is called t‐apex tree if there exists a t‐set such that G ? X is a tree, while for any with , G ? Y is not a tree. Let be the set of t‐apex trees of order n. In this article, we determine the extremal graphs from with minimal and maximal matching energies, respectively. Moreover, as an application, the extremal cacti of order n and with s cycles have been completely characterized at which the minimal matching energy are attained. © 2015 Wiley Periodicals, Inc. Complexity 21: 238–247, 2016     

粒径对煤在H2/Ar等离子体中热解的影响

对粒径在H2／Ar等离子体煤热解制乙炔中的影响进行了研究，得到了煤的粒径与煤的裂解程度（转化率）、乙炔收率、乙炔在产品气体中摩尔分数和反应器壁结焦的关系，并且在考虑各种因素的制约下，对如何选择最佳粒径和粒径分布的问题进行了讨论。根据煤等离子体热解制乙炔反应器壁结焦的机理和煤粒径是影响反应器内结焦的重要因素，提出了进料粒径双峰分布缓解煤等离子体热解制乙炔装置结焦的新方法，实验证明该方法可行。     

聚合物分散液晶的制备及拉曼光谱分析

用溶致相分离的方法制备了以PMMA为基体的四种不同配比的聚合物分散液晶(PDLC),四氢呋喃为引发剂,并且通过傅立叶拉曼光谱仪对其进行检测,分析其光谱,观察各单体混合前后性质的变化,鉴别聚合物分散液晶的物质构成。此外,在指定的组分前提下,根据液晶最强峰与PMMA特征峰的相对强度拟合曲线得出PDLC中液晶与PMMA的质量百分比,为下一步研究聚合物分散液晶系统的光折变特性提供指导。     

The finite-element-force method for solving plane problems of elasticity

Using elements in the form of arbitrary sectors, the author has devised a plan for solving plane problems of elasticity by the force method. The method is characterized by a smaller number of nodes, a more convenient computation and a perfect adaptability to the particular shape of the region in question.