工业锅炉受热面结渣的防止措施

分析了锅炉结渣的原因和危害,从设计和运行两方面阐明了锅炉结渣的防止措施,比如加强燃料管理、合理调整燃烧工况、加强运行检查和分析等.     

落叶松材生长特性对应力波传播速度的影响

通过对落叶松材试件进行的应力波检测试验,研究了木材节疤尺寸和数量、生长率等对应力波传播速度的影响,并对节疤尺寸等与应力波传播速度之间关系进行了回归分析.结果表明,应力波传播速度与节疤尺寸大小呈负相关,与生长率呈负相关.密度对应力波传播速度的影响在无疵试件和有节疤等试件中是不同的.     

关于聚酯工业丝网络度的研究

本文研究了网络喷嘴形式、压缩空气压力、压缩空气进网络喷嘴管的管径及卷绕张力对不同规格的聚酯工业丝网络度的影响     

烟草根结线虫病综合防治技术

介绍了烟草根结线虫病的分布、为害、症状及发病条件 ,详细介绍了烟草根结线虫病的综合防治措施 :①种植抗病品种 ;②农业措施防病 ;③化学药剂防治和生物制剂防治     

盘扣在服装设计中排列布局的“变”与“形”

为了拓展中国传统服饰元素———盘扣在现代服装设计中的创新思维,针对目前专业领域内盘扣造型与技艺的研究居多,而关于盘扣与服饰的空间关系研究较少的现状,采用个案分析法结合创新实践,通过梳理盘扣的起源与发展,归纳与分析盘扣的常见造型、材质及工艺技法,对比不同时期盘扣在服饰中的排列组合方式,实践盘扣在创意女装中排列布局的个性设计,探索其对服装整体造型和风格的影响。研究结果表明:改变盘扣在服装设计中排列布局的固有思维,不仅可以增加服装的个性、趣味和层次感,而且也为传统元素融入现代服装多元化设计提供了创新思路。     

5%"神农丹"等3种农药防治烟草害虫的药效试验

大田对比试验表明 ,5 %“神农丹”和 15 %“铁灭克”在移栽时穴施和旺长期追施 ,对烟蚜及烟草根结线虫有很强的杀伤作用 ,无翅蚜虫口减退率可达 10 0 % ,移栽时穴施 15 %“铁灭克”1.0kg/6 6 6 .7m2 、5 %“神农丹”3.0kg/6 6 6 .7m2 对烟草根结线虫相对防效达 80 %以上 ,两种药剂防治效果差异不大     

天丝织物的扎染工艺

介绍天丝织物扎染的步骤和方法，并同棉纤维相比，对天丝织物的染色工艺作详细分析。     

Isogeometric thickness stretchable shell: Efficient formulation for nonlinear dynamic problems

An isogeometric shell element with through-thickness stretch is introduced and applied to quasi-static and dynamic problems. The shell element supports full three-dimensional constitutive laws, ie, the plane stress assumption is not required. An updated Lagrangian rate formulation is adopted, and biquadratic spline-based interpolation functions are used for in-plane interpolation. The concept of fiber mass scaling is proposed to lower the highest eigenfrequencies to improve the performance of the formulation. Clamped and unclamped knot vectors are compared, and the advantages of using unclamped knot vectors are demonstrated. The shell element is validated using several benchmark tests, which indicate good performance of the proposed formulation.     

The solitary wave solution of the two-dimensional regularized long-wave equation in fluids and plasmas

This paper investigates the solitary wave solutions of the two-dimensional regularized long-wave equation which is arising in the investigation of the Rossby waves in rotating flows and the drift waves in plasmas. The main idea behind the numerical solution is to use a combination of boundary knot method and the analog equation method. The boundary knot method is a meshless boundary-type radial basis function collocation technique. In contrast with the method of fundamental solution, the boundary knot method uses the non-singular general solution instead of the singular fundamental solution to obtain the homogeneous solution. Similar to method of fundamental solution, the radial basis function is employed to approximate the particular solution via the dual reciprocity principle. In the current paper, we applied the idea of analog equation method. According to the analog equation method, the nonlinear governing operator is replaced by an equivalent nonhomogeneous linear one with known fundamental solution and under the same boundary conditions. Furthermore, in order to show the efficiency and accuracy of the proposed method, the present work is compared with finite difference scheme. The new method is analyzed for the local truncation error and the conservation properties. The results of several numerical experiments are given for both the single and double-soliton waves.     

Flora_Flex: In Search of Synthetic Immortality

Evan Douglis performs alchemy, bringing to life from theinaminate ‘the natural’ with his genetically inspired Flora_flex prefab modular building system. He demonstrates the beauty, intricacy and opulence inherent in pursuing flowering plant morphology as a model for surface variation. Copyright © 2008 John Wiley & Sons, Ltd.