3D UV-microforming: principles and applications

A low-cost surface micromachining technology is described and examples provided of its application to microsensor and microactuator fabrication. The new technology 3D UV-macroforming, combines depth ultraviolet (UV) lithographic patterning of very thick photoresists and electrodeposition of structural materials into the patterned resist moulds. Neither UV lithography nor electrodeposition needs expensive or special equipment. Micromechanical components with high structures can be directly manufactured onto the system surface. Movable three-dimensional (3D) microstructures with a high aspect ratio can be obtained by combining the 3D UV-microforming process with a sacrificial layer technique. As an example of an advanced application in microsystem technology, the fabrication of triaxial accelerometers is presented, using titanium as a sacrificial layer and nickel as the structural material     

切断亚麻脱胶漂白新工艺

将亚麻打成麻以9．5mm、15．8mm的长度切断后，经过脱胶漂白及梳理机梳理后，亚麻短纤维手感柔软、松散、洁白，与木浆纤维以50：50的比例混合经造纸工艺无纺布成形。另可根据不同切断长度，与棉、毛、丝、化纤等混纺或无纺布工艺成形。     

Interactive Dimensionality Reduction Through User-defined Combinations of Quality Metrics

Multivariate data sets including hundreds of variables are increasingly common in many application areas. Most multivariate visualization techniques are unable to display such data effectively, and a common approach is to employ dimensionality reduction prior to visualization. Most existing dimensionality reduction systems focus on preserving one or a few significant structures in data. For many analysis tasks, however, several types of structures can be of high significance and the importance of a certain structure compared to the importance of another is often task-dependent. This paper introduces a system for dimensionality reduction by combining user-defined quality metrics using weight functions to preserve as many important structures as possible. The system aims at effective visualization and exploration of structures within large multivariate data sets and provides enhancement of diverse structures by supplying a range of automatic variable orderings. Furthermore it enables a quality-guided reduction of variables through an interactive display facilitating investigation of trade-offs between loss of structure and the number of variables to keep. The generality and interactivity of the system is demonstrated through a case scenario.     

弹性金属塑料轴瓦的特性及应用展望

本文介绍了弹性金属塑料轴瓦的特性、结构特点和应用效果，提出了弹性金属塑料轴瓦在水力发电机中的应用前景。     

汽轮机的能量平衡及各效率间的耦合性分析

在汽轮机能量平衡方程的基础上，对汽轮机相对内效率与理想循环热效率的概念进行讨论指出汽轮机采用回循环环中间再热后，其相对内效率与理想循环热效率间存在较强的耦合性。最后，建议汽轮机热力试验中应该对回热系统运行条件对汽轮机相对内效率的影响进行修正。     

A GOOD DIFFUSION LAYER CANDIDATE FOR SHARK

In this paper, a good diffusion layer candidate for SHARK is developed. The diffusion layer presented here is only concerned with 64-bit cipher based on 2-DM diffusion matrixes, which is heavily inspired by James Massey work on the design of SAFER K-64. However, it can be easily extended for a longer size cipher without any extra works and it may serve as a good candidate for other block ciphers.     

砂型厚度对熔铸锆刚玉冷却过程中传导热通量的影响

为选择合适的砂型厚度,提高铸件成品率,利用COMSOL Multiphysics软件模拟了33#锆刚玉熔体的冷却过程,分析了SiO2砂型厚度(分别为30、40、50 mm)对冷却过程中铸件传导热通量分布和变化的影响。结果表明:1)SiO2砂型热导率小,不利于铸件表面的快速冷却;铸件中心截面上角部热通量大,冷却速度大,中心附近区域热通量小,冷却速度小。2)砂型厚度增加,铸件的最大热通量减小,冷却速度减小,而最大热通量的面积增大,有利于减小不同部位冷却速度差别;但厚度继续增加不能显著改善冷却速度不均现象,反而导致砂型工段成本增加和劳动强度显著增大,因此砂型厚度以40 mm为宜。     

Research on the adjustment model of ventilation characteristic parameters based on integrated method of circuit and path

Ventilation characteristic parameters are the base of ventilation network solution; however, they are apt to be affected by operating errors, reading errors, airflow stability, and other factors, and it is difficult to obtain accurate results. In order to check the ventilation characteristic parameters of mines more accurately, the integrated method of circuit and path is adopted to overcome the drawbacks caused by the traditional path method or circuit method in the digital debugging process of ventilation system, which can improve the large local error or the inconsistency between the airflow direction and the actual situation caused by inaccuracy of the ventilation characteristic parameters or checking in the ventilation network solution. The results show that this method can effectively reduce the local error and prevent the pseudo-airflow reversal phenomenon; in addition, the solution results are consistent with the actual situation of mines, and the effect is obvious.