基于上转换纳米晶体合成玻璃的空间三维投影

本文介绍了上转换纳米晶体合成玻璃的空间三维投影显示,利用上转换纳米晶体合成的玻璃作为空间三维投影的承载介质,测量其受红外光激发时的荧光光谱,并分析光致发光机制,搭建合理的光路,实现空间三维悬浮显示。     

基于混合搜索算法的贴片机贴装过程优化

贴片机是PCB组装生产线中的瓶颈设备,提高其贴装效率对整个生产线有重要意义;针对该设备的生产效率优化问题,提出了由最近邻算法和分散搜索算法组成的混合算法;本算法将使用最近邻算法求解元器件的拾取贴装顺序并通过将其引入到分散搜索的框架中求解喂料器分配问题,使两个子问题的求解过程相互结合,从而更好完成贴装效率的优化;仿真结果表明,在大多数情况下该算法都能够在取得优于原有最近邻算法的效果;说明该算法能够更好的提高贴片机的贴装效率.     

基于并行I/O口在高速实时数据通讯中的应用

较为详细地介绍了利用上下位机的并行I/O口进行高速实时通讯和传输数据的新方法.该方法基于快速响应中断通过上下位机的并行I/O口实现实时通讯和传输的,一次数据通讯时间为50μs左右,很好地解决了核聚变实验装置对快速控制的要求.同时该方法也对其它每次传送数据量不大但要求快速响应的实时控制系统的实现具有参考价值.     

三氯化磷氧氯氧化法生产三氯氧磷技术通过鉴定

由南京化工学院、青岛有机化工厂研制的三氯化磷氧氯氧化法生产三氯氧磷200吨/年中试技术,1991年12月25日在青岛市通过了青岛市经委,科委组织主持的鉴定。参加鉴定会的青岛化工学院、青岛市化工学会和青岛市产品质量检测所等单位的专家、教授一致认为:氧化法新工艺技术先进,在国内处于领先地位。     

Stretch rate and deformation for pre-stretching aluminum alloy sheet

Numerical simulation combined with experimental test was carried out to analyze the pre-stretching process of the 7075 aluminum alloy sheet, from which the stress variation curves and residual stress of aluminum alloy sheet in different stretch rates were obtained. The results show that the residual stress in length direction is released after unloading the stretch force, while the residual stress in width direction is released during the stretching process. The study of residual stress elimination is beneficial for optimizing stretch rate on the basis of residual stress distribution law. By comparing the variation principle of residual stress in length direction, the size range of three deformation areas and elimination percentage of residual stress were obtained. The residual stresses of clamping area and transition area are not eliminated effectively, so sawing quantity should be the sum of both the areas. The elimination rate of residual stress in even deformation area could reach 90% after choosing a proper stretch rate, which is verified by both simulation and experiment.     

基于RAPWBN模型的快速高效Hough变换并行算法

提出了RAPWBN模型上的整数前缀和与抽取压缩操作算法，并由此得到了RAPWBN模型上的快速高效Hough变换并行算法，对于大小为n×n的二值数字图像，p个θ参数值。可以使用pn2个处理器在O(1)时间完成。使算法的速度和效率达到了最优。     

高校学分制教学管理体制下教学调度的科学性研究

社会主义市场经济体制的不断深化以及高校招生规模的扩大,为高等教育的改革与发展创造了机遇,同时也提出了新的要求。在这种新形势下,我校遵循教育与社会发展的关系、教育和人的发展关系,深入探索、改革教学管理,经过广泛的调研论证,建立并推行了以学分制为核心、兼容分级分类教学和弹性学制的新型教学管理体制。推行新型的教学管理体制,是一项复杂而艰巨的系统工程,而教学调度又是其实施的重点和难点,必须紧跟教学管理体制变革的步伐。教学调度涉及高校教学管理全过程,对于深化教学改革,提高办学质量和效益,培养适应市场经济条件的新型复合…     

The Experiment of Modulated Toroidal Current on HT-7 and HT-6M Tokamak

The Experiments of Modulated Toroidal Current were done on the HT-6M tokamak and HT-7 superconducting tokamak. The toroidal current was modulated by programming the Ohmic heating field. Modulation of the plasma current has been used successfully to suppress MHD activity in discharges near the density limit where large MHD m = 2 tearing modes were suppressed by sufficiently large plasma current oscillations. The improved Ohmic confinement phase was observed during modulating toroidal current (MTC) on the Hefei Tokamak-6M (HT-6M) and Hefei superconducting Tokamak-7 (HT-7). A toroidal frequency-modulated current, induced by a modulated loop voltage, was added on the plasma equilibrium current. The ratio of A.C. amplitude of plasma current to the main plasma current △Ip/Ip is about 12% ～ 30%. The different formats of the frequency-modulated toroidal current were compared.     

旁路式混合励磁电机初探

针对普通混合励磁电机价格昂贵、制作工艺复杂等问题,提出了一种新型的旁路式混合励磁电机。分析了该电机的结构和工作机理,运用三维有限元法对其工作机理进行了验证。样机有限元分析的结果说明该新结构电机制作技术不仅简单且具有较强的磁场控制能力。     

求机构速度瞬心的对心四边形法

本文阐述了求机构中不相邻两构件间速度瞬心的一种新方法,即“对心四边形法”,该法是将两不相邻构件和与它们相关的两构件组成封闭四边形,并用两封闭边的交点求得它们之间的速度瞬心的一种方法,此法比传统的三心定理法更为简便,可不受三心定理法求解瞬心顺序的限制,对求解平面多杆机构的速度瞬心是一种新的有效方法。