用于注吹成型塑料包装瓶的模具结构设计

介绍了一步法单工位注吹模具结构设计,可在普通注塑机上一次性注吹成型塑料中空制品,具有很好的实际应用价值。     

药用塑料包装瓶模具结构设计

介绍了一步法单工位注吹成型药用塑料包装瓶的模具结构设计。该模具一模8腔,结构紧凑,操作维修简单,从型坯到制品用普通注射机一步完成,克服了二步法和一步法三工位生产工艺环节多、设备投资大的缺点,产品成品率高。     

含新型吲哚衍生结构聚合物的制备及海洋防污应用研究

以5-溴-1-氢吲哚为起始原料,经Friedel-Crafts反应, 设计合成了环境友好型防污剂--N-(5-溴-1H-吲哚-3-甲基)丙烯酰胺(NBIAM), 产率可达76.7%.研究了NBIAM与丙烯酸类单体的聚合反应, 得到了结构新颖的具有自抛光性能的丙烯酸铜聚合物(SP-1),并与普通丙烯酸铜聚合物(SP-2) 的物理性能进行了比较. 海上挂板实验结果表明, SP-1及其防污涂料SPC-1在防止大型污损生物附着方面显示了优异的性能.     

Study on three-dimensional heterogeneous calculation of ITER test blanket module with deterministic method

The neutronics analysis on the test blanket module (TBM) has important significance for the ITER device and its related experiment design. Quantities of scoping-type studies and conceptual designs were published by using the Monte Carlo method. However, disadvantages like time consuming make it necessary to develop a new highly efficient method. Hence, a new two-step approach method based on the 3D deterministic method for analyzing the TBM is proposed in this paper. A code package 3DMOC-NSPn was developed. It is mainly composed of three modules, the 3DMOC for generating the homogenization cross section; the LINK code for cross section condensation and the NSPn code for blanket calculation. The detailed flux distribution throughout the whole TBM and the mainly neutronics features, such as TBR, displacement per atom (DPA), helium and hydrogen production rate can be obtained. To validate the numerical approach and the code package, the calculations on China dual functional lithium lead-test blanket module (DFLL-TBM) was performed. The reference results were obtained by using the MCNP code. The numerical results from 3DMOC-NSPn are in good agreement with the references. It indicates that the whole code package is a reliable neutronics analysis tool for the TBM design and evaluation.     

混炼胶在圆锥口型挤出膨胀行为的研究

分析了混炼胶在收敛流变中的粘弹特性，应用张量分析方法，在高聚物熔体入口收敛流动中，引入纯拉伸流变概念，导出了描述胶料在圆锥口型挤出膨胀的方程：Ｂ￣２＝３［１＋（ＫＳ＿Ｒ）￣２］￣（－２／３／７）．实验结果表明，当圆锥口型入口角较大时，对混炼胶挤出膨胀的影响，是拉伸流变效应起主导作用。     

基于工程能力培养的生物工程设备课程教学实践简

生物工程设备是生物工程专业的重要课程,也是一门包含大量知识、注重实践和应用的课程。本文从教学内容优化、教学手段改进和师资建设等方面总结了生物工程设备课程的教学实践,以期望提高教学质量、促进学生工程能力的培养和教学经验的交流。     

利用第三代数字PABX组建专用数据通信网

本文以一个专用网为实例，介绍了利用第三代数字ＰＡＢＸ组建专用数据通信网的具体应用情况。     

A new three-dimensional method of characteristics for the neutron transport calculation

The method of characteristics (MOC) is a very flexible and effective method for the neutron transport calculation in a complex geometry. It has been well developed in two-dimensional geometries but meets serious difficulty in three-dimensional geometries because of the requirements of large computer memory and long computational time. Due to the demand related to the advanced reactor design for complex geometries, an efficient and flexible three-dimensional MOC is needed. This paper presents a modular ray tracing technique to reduce the amount of the ray tracing data and consequently reduce the memory. In this method, the object geometry is dissected into many cuboid cells by a background mesh. Typical geometric cells are picked out and ray traced, and only the ray tracing data in these typical cells is stored. Furthermore, the Coarse Mesh Finite Difference (CMFD) acceleration method is employed to save computing time. Numerical results demonstrate that the modular ray tracing technique can significantly reduce the amount of ray tracing data, and the CMFD acceleration is effective in shorting the computing time.