一类非线性m点边值问题正解的存在性与多解性

考察了一类非线性常微分方程的m点边值问题,通过考察非线性项在有界集上的性质,运用Krasnosel’skii锥拉伸与锥压缩型不动点定理及格林函数的性质,获得了其正解的存在性与多解性,推广和改进了以前文献的相关结果.     

凝析气藏相态参数实验研究

油气藏流体主要有烃类成分组成,在油藏及地面条件下,这种烃类混合物的物理性质取决于其化学成分及给定的温度和压力。对于烃类的相态特征及流体组分研究在油气田开发中具有重要的意义,尤其是凝析气藏田。对海榆和10井的研究,归纳总结其流体PVT性质,为其开发提供科学依据。     

乳胶漆对比率的影响因素

讨论了影响乳胶漆对比率的各种因素。     

产教合作——创新职业教育办学模式

2006年11月4日,安徽电气工程职业技术学院在本校主办了第三届高职论坛,本次论坛的主题是“校企合作,创新人才培养模式”。本次论坛得到主管部门、兄弟院校和企业界大力支持与积极参与,学术研讨气氛浓厚。安徽省职业与成人教育学会会长金辉同志到会祝贺并作了主题为“产教合作,创新职业教育办学模式”的专题发言,该发言在与会专家中产生了很大反响,现特意刊出。     

锅炉再热热段水压试验堵阀的安装焊接工艺

ZG15Cr1Mo1V材质的再热器堵阀、10CrM0910材质的管道的异种钢接头按低匹配原则选择了焊接材料，采用手工钨极氩弧焊打底手工电弧焊填充盖面方法施焊。焊前进行了200～300℃的预热，焊后进行了720～750℃的高温回火处理。经检验，焊口质量合格；焊口投用后，安全运行可靠运行。     

液芯有机光纤的研制

研制出了液态有机光纤.结果表明,有机溶液的拉曼光谱与普通样品池的方法相比,其强度增加102倍以上.     

Explicit local buckling analysis and design of fiber–reinforced plastic composite structural shapes

Pultruded fiber–reinforced plastic (FRP) composite structural shapes (beams and columns) are thin-walled open or closed sections consisting of assemblies of flat plates and commonly made of E-glass fiber and either polyester or vinylester resins. Due to high strength-to-stiffness ratio of composites and thin-walled sectional geometry of FRP shapes, buckling is the most likely mode of failure before material failure. In this paper, explicit analyses of local buckling of rectangular orthotropic composite plates with various unloaded edge boundary conditions (i.e., (1) rotationally restrained along both unloaded edges (RR), and (2) one rotationally restrained and the other free along the unloaded edges (RF)) and subjected to uniform in-plane axial action at simply-supported loaded edges are first presented. A variational formulation of the Ritz method is used to establish an eigenvalue problem, and explicit solutions of plate local buckling coefficients in term of the rotational restraint stiffness (k) are obtained. The two cases of rotationally restrained plates (i.e., the RR and RF plates) are further treated as discrete plates of closed and open sections, and by considering the effect of elastic restraints at the joint connections of flanges and webs, the local buckling of different FRP shapes under uniform axial compression is studied. The approximate expressions of the rotational restraint stiffness (k) for various common FRP sections are provided, and their application to sectional local buckling predictions is illustrated. The explicit local buckling formulas of rotationally restrained plates are validated with the exact transcendental solutions. The analytical predictions for local buckling of various FRP profiles based on the present discrete plate analysis and considering the elastic restraints of the flange–web connections are in excellent agreements with available experimental results and finite element eigenvalue analyses. A design guideline for local buckling prediction and related performance improvement is proposed. The present explicit formulation can be applied effectively to determine the local buckling capacities of composite plates with elastic restraints along the unloaded edges and can be further used to predict the local buckling strength of FRP shapes.     

本田雅阁ABS指示灯信息资源分析及应用

正确使用ABS(汽车防抱死制动系统),可有效提高汽车的制动效能和制动稳定性。本田雅阁轿车仪表板上的指示灯通过点亮和熄灭向我们提供着丰富的信息资源,在汽车运用中,合理准确地运用这一资源至关重要。依据这些信息,及时排除有关故障,从而确保汽车良好的制动性及行车安全。