锑化铟抛光片表面粗糙度优化研究

锑化铟是中波红外探测应用较广的材料。抛光片的表面粗糙度是影响器件性能的关键指标。研究了锑化铟化学机械抛光(Chemical Mechanical Polishing, CMP)液的pH值、氧化剂比例以及抛光液流速对锑化铟抛光片表面粗糙度的影响,并结合原子力显微镜(Atomic Force Microscope, AFM)和表面轮廓仪测试对抛光片的表面粗糙度进行了表征和优化。结果表明,当pH值为8、氧化剂比例为0.75%、抛光液流速为200 L/min时,InSb晶片的表面粗糙度为1.05 nm (AFM),同时晶片的抛光宏观质量较好。     

任务联盟演化过程行动策略优选的DINs建模

优化选择一定的行动策略能促使任务联盟向期望的目标效果演化。考虑部分事件/行动在不同时段下影响强度不相一致, 使用考虑影响值时变的动态影响网(DINs)对联盟演化过程行动策略优选问题进行建模, 给出因果强度逻辑下概率传播参数设计的一致性条件, 并基于因果强度逻辑进行影响值计算。结合空中进攻作战想定案例进行仿真验证, 计算结果表明, 通过部分事件/行动节点影响值变化下进行策略优选提高了对因果关系的建模能力。     

An adaptive approach for handling two‐dimension influence maximization in social networks

To synthetically and dynamically make strategic choices in social networks, a novel adaptive approach to deal with two‐dimension influence maximization problem (TIMP) is proposed with game‐based diffusion model, which can achieve trade‐off between diffusion time and the number of active nodes. At first, TIMP model is synthetically formulated, and diffusion time and the number of active nodes are defined mathematically. In particular, budget efficiency is presented to describe TIMP in order that an appropriate trade‐off between diffusion time and the number of active nodes can be reached. Then, an adaptive heuristic (A‐Heuristic) scheme is proposed to dynamically determine the initial seed nodes (ie, the most influential nodes). Finally, experiments are performed, and their results verify the superior performance of the proposed scheme in terms of budget efficiency, running time, and the number of active nodes.     

高溜井卸矿冲击气流产生规律及其影响因素的数值模拟

高溜井卸矿过程中产生的冲击气流是卸矿硐室及其附近巷道产尘的主要原因,本文采用考虑气固两相间双向耦合作用及颗粒间碰撞作用的密相DPM模型进行模拟,对气相和颗粒相分别采用欧拉法和拉格朗日法建立控制方程,数值模拟研究高溜井卸矿时冲击气流产生及其与各影响因素之间的关系。计算结果表明：冲击风速随卸矿流量的增加而增加,但其增幅随卸矿流量增加而减小,最大冲击风速与卸矿流量成近似幂函数关系,且卸矿高度越大,幂指数越大,模拟得幂指数范围为0.593~0.732;卸矿高度越高,冲击气流越大,且最大冲击气流与卸矿高度的1.05次方近似成正比;矿石粒径越大,冲击气流越小,最大冲击风速与矿石粒径的-0.63次方近似成正比;多中段同时卸矿时,各中段产生的流场会相互作用,从而降低冲击气流的叠加。     

不锈钢焊条熔滴过渡及其影响因素研究

采用水中收集熔滴、平板堆焊、高速摄影等试验方法,研究了典型不锈钢要熔滴过渡特性及其影响因素。结果表明,熔滴过渡指数为优化值时,焊条熔滴呈渣壁过渡形态,焊条的综合工艺性最佳;药皮中的ＳｉＯ２细化熔滴作用最强,增大药皮厚度和焊接电流均使熔滴细化,但受焊条工艺性制约;熔滴反应区的渗Ｓｉ反应亦有利于细化熔滴,但受焊缝最高含Ｓｉ量的限制;焊接熔渣的碱度、组成物及含量对熔滴过渡特性亦有一定的影响,提出了“焊条     

阳泉矿区煤层开采对自燃的影响及预防措施

分析了阳泉矿区三矿井田煤层开采对自燃着火的影响因素 ,探讨了预防煤层的自燃着火的开采技术措施。     

用于PSPICE仿真的IGBT宏模型

介绍了一种可用于ＰＳＰＩＣＥ的ＩＧＢＴ宏模型。采用程序设计的方法,将该模型加入到ＰＳＰＩＣＥ的模型库中,并由相关测试电路对此模型进行仿真测试。该模型的仿真值与实际器件测试值相比,无论是ＤＣ特性还是开关特性均吻合较好,表明该模型可用于工程ＣＡＤ中。     

风对声定位的影响及其修正

文中针对被动声定位时风速的影响,分别对等效传播距离、风速和风向对声程差的影响、风对定角的影响及其修正开展了理论建模和仿真研究,仿真结果表明,采用修正后,5级风力下的定向精度影响小于0.3°.     

射流侵彻混凝土介质数值模拟及影响因素研究

利用Ansys/LS-DYNA有限元分析软件,对聚能射流侵彻混凝土介质的全过程进行了数值模拟,模拟结果与实验数据基本吻合。通过数值模拟计算重点分析了药型罩锥角、药型罩厚度、壳体厚度、炸高和装药长度对聚能射流侵彻效能的影响规律。研究结果表明：药型罩锥角、药型罩厚度和炸高对聚能射流的侵彻深度和侵彻孔径影响较大,而壳体厚度和装药长度对侵彻效能影响较小。     

Influence of Na on the properties of Cu-rich prepared CuInS2 thin films and the performance of corresponding CuInS2/CdS/ZnO solar cells

Using different glass substrate types the Na content in sequentially and Cu-rich prepared CuInS₂ films and corresponding CuInS₂/CdS/ZnO thin-film solar cells is varied. The purpose was to investigate the influence of different Na concentrations on absorbers and devices. While the morphology of the absorbers seems not to be affected by this variation, corresponding PL spectra differ significantly. The properties of the solar cells, however, show no dependence on the Na concentration. This implies that even though the defect chemistry of CuInS₂, sequentially prepared under Cu excess, is changed by the presence of Na this influence has no impact on properties of corresponding solar cells.