Cabinetmakers’ Workplace Mathematics and Problem Solving

This study explored what kind of mathematics is needed in cabinetmakers’ everyday work and how problem solving is intertwined in it. The informants of the study were four Finnish cabinetmakers and the data consisted of workshop observations, interviews, photos, pictures and sketches made by the participants during the interviews. The data was analysed using different qualitative techniques. Even though the participants identified many areas of mathematics that could be used in their daily work, they used mathematics only if they were able to. The cabinetmakers’ different mathematical skills and knowledge were utilized to their skill limit. Cabinetmakers were found to constantly face problem solving situations along with the creative processes. Being able to use more advanced mathematics helped them to solve those problems more efficiently, without wasting time and materials. Based on the findings, the paper discusses the similarities and differences between problem solving and creative processes. It is suggested that the combination of craftsmanship, creativity, and efficient problem solving skills together with more than basic mathematical knowledge will help cabinetmakers in adapting and surviving in future unstable labour markets.     

关于欠发达地区科技力量提升与公务员队伍发展的思考

如何开发新的人力资源提高我国西部地区的经济发展水平是人们普遍关心的问题，本文从西部地区科技力量提升和公务员进入经济流通领域分析入手，认为公务员队伍是欠发达地区重要的人力资源，是引导农民进入经济开发主战场的唯一力量。本文提出对欠发达地区的公务员队伍应有二元政策，同时认为二元政策发展中国西部经济的核心问题是人的问题，人的理解与思考，人力资源的开发与利用；是科技发展的问题，科学技术水平的普遍提高，技术成果中科技含量的普遍增加，是观念的进一步更新的问题，观念从地方经济发展的圈子中彻底摆脱出来，能够在一定视角下对西部地方经济有全新的思维，能够在全国经济发展的背景中看到西部经济的出路，能够既有战略眼光，又有战略胆识与气魄；是文化素质普遍提高的问题，文化素质从低水平状况向高水平发展，使之不再成为经济发展的制约因素和影响西部广大群众彻底摆脱贫困的最大障碍。     

Transmission line realization of subwavelength resonator formed by a pair of conventional and LHM slabs

INTRODUCTION Left-handed materials (LHMs), first investigated theoretically by Veselago (1968), have received sub- stantial attention in the scientific and engineering communities. The unique properties of these meta- materials are promising for a diversity of microwave applications, such as new types of beam steerers, modulators, filters, superlens (Pendry, 2000), cou- plers and antenna radoms (Smith et al., 2004). Re- cently, a transmission line (TL) approach has been successfully in…     

中国商业银行利率竞争分析

1　Introduction　Theobjectiveofthisstudyistoexaminecompeti tionenvironmentforinterestrateandtopreviewthecompetitiontrendsaftertheinterestratehasbeenful lyliberalizedinChina .Underthedominantfixedin terestrate ,almostnorealcompetitionregardingin terestratehadeveroccurredamongcommercialbanksinChinauntilveryrecentlywhentheinterestratelib eralizationreformhasbeenunderwaysince 2 0 0 0 .Tostudythecompetition ,thepaperisstructuredasfol lows .Section 2 providesaquantitativeexaminationoftheenvironment…     

论“北歌南灯”之特征及其差异

东北秧歌、陕北秧歌,安徽花鼓灯和云南花灯,是“北歌南灯”的重要代表。“北歌南灯”的舞步、舞姿等动律特征和舞具特征反映了汉族民俗舞的南北差异。同时,通过各地区民俗舞之间的交互影响甚至是直接的播迁、传承,又使“北歌南灯”在许多地方保持了一致性。     

优化问题的新步长法则

The step-size procedure is very important for solving optimization problems. The Armijo step-size rule, the Armijo-Goldstein step-size rule and the Wolfe-Powell step-size rule are three well-known line search methods. On the basis of the above three types of line search methods and the idea of the proximal point methods, a new class of step-size rules was proposed. Instead of a single objective function f, f ＋1/2（x - xk）^TBk（x-Xk） was used as the merit function in iteration k, where Sk is a given symmetric positive definite matrix. The existence of the steplength for the new rules was proved. Some convergence properties were also discussed.     

知识准入课程的博弈过程分析

在决定什么知识能够准入课程，什么知识必须被排斥在课程之外的问题上，支配集团掌握着绝对的话语权。但被支配集团也试图以自己的方式争夺其话语权。由此，知识准入课程并不是一个由支配集团单向独断、单方建构的过程，而是不同利益群体争相在课程中获得话语权的博弈过程，其间充满了斗争、冲突与妥协。课程，就是不同利益群体多次博弈后妥协的结果。     

提高活性石灰回转窑小法兰使用寿命的探讨与实践

通过对小法兰使用现状的分析，得出小法兰的主要失效形式表现为它与筒体间的焊缝出现裂纹、小法兰盘面变形等现象。综合对小法兰与筒体材料的可焊性、外力作用对结构材料的影响、高温环境对焊接结构及焊接接头的影响等方面的分析，提出了改善小法兰与筒体焊接结构和焊接质量以提高小法兰使用寿命的主要对策与实践。     

弹性有限长度杆在轴向应力波传播和反射过程中的屈曲

讨论弹性有限长度杆端部受冲击载荷作用，在轴向应为波传播和反射过程中的动态屈曲问题．利用扰动方程的解、端部支承条件和应力波反射前后波阵面相容条件得到了动态屈曲的分叉条件，临界载荷和屈曲模态．数值结果表明：临界载荷有多个分支且随时间增加而降低；由于应力波在端部的反射，使临界载荷进一步下降．这个结果就解释了实验中的一些现象．