Degradable Superhydrophilic Iron-Pillared Bentonite Doped with Polybutylene Adipate/Terephthalate Open-Cell Foam: Its Application in Dye Degradation,Removal of Heavy Metal Ions,and Oil–Water Separation

Development of industrialization has brought convenience to people's lives; however, it has also brought serious harm to the environment, where, water pollution is the most obvious. Here, a polybutylene adipate terephthalate (PBAT) open-cell foam doped with iron-pillared bentonite (IPB) is prepared by using sugar as a pore-forming agent and solution phase separation, and then combined with a solution dipping method to coat the foam surface with a polyacrylamide/SiO₂, which makes the PBAT foam superhydrophilic. The static adsorption effect of superhydrophilic IPB-doped PBAT open-cell foam on methylene blue (MB) and Cu²⁺ is studied. The adsorption isotherm fitting shows that the adsorption conforms to the Langmuir model and it has biased toward monolayer adsorption. The adsorption kinetics fitting confirms that the adsorption process is in line with the pseudo-second-order adsorption model, which is dominated by chemical adsorption. The modified PBAT open-cell foam has an adsorption effect on Cu²⁺; however, it has weak cyclic adsorption capacity. It shows a good cyclic adsorption ability for the cationic dye MB and it has >95% photodegradation efficiency of the MB after five time's cyclic adsorption. The superhydrophilicity makes the foam to have better applications in oil–water separation.     

An adaptive interference alignment scheme based on the dynamic selection of desired transmitters for unmanned ship network

Wireless Networks - In the unmanned ship networking scenario, the position of the unmanned ship changes continuously, leading to the result that the desired transmitters and the interference...     

Analysis and application of Bio-Inspired Multi-Net Security Model

With the rapid development of network technologies and deteriorating of network environment, traditional single-net security system cannot satisfy the security requirement. The excellent security performance of biological systems impels the bio-inspired network security theory to be a hot research area currently. Based on Bio-inspired Multidimensional Network Security Model we have put forward, we have advanced Bio-inspired Multi-Net Security system by implementing the functional distribution of different subnets of different transient states in Multi-Net Paralleling structure. Firstly, parameter estimation and modified algorithms of Hidden Markov Model are introduced to construct the mathematical mode of B-MNS; secondly, the integrated performance of our modified B-MNS has been tested and its simulation has been carried out. So the feasibility, validity and high efficiency of our model have been demonstrated theoretically, and practically.     

新型软开关电力高频开关整流电源

本文讨论了一种电力操作电源用高频开关充电电源模块的设计。该模块采用了一种简单的零电压零电流开关(ZVZCS)的全桥PWM变换电路拓扑。与其他ZVZCS全桥PWM变换电路相比,这种变换器的电路拓扑结构很简单,通过适当的控制方式及合适的参数选择,这种变换器可以在很宽的负载变化范围内以软开关方式高效率地工作。文中对这种变换器的工作原理、工作过程进行了较详细的理论分析,并根据分析过程中的数学描述对电路的有关参数设计给予了说明。最后通过仿真并用-6kW样机实验验证了所讨论的变换器工作原理的正确性及实用上的可行性。     

多雷达数据处理系统中网格同步研究综述

在多雷达数据处理系统中，各种误差是影响目标跟踪和数据融合质量的一个重要因素。而网格同步则是系统中的一个重要环节，是进行数据融合的前提。如果没有网格同步则融合结果不可信。文章介绍了网格同步的定义，分析了目前国内外研究的主要方法。并针对此提出了一些新的想法。     

600MPa级汽车机械搅拌罐用钢的研发与应用

通过采用合理的低碳-锰-钛成分体系和生产工艺控制,成功研制了600 MPa级高强度汽车机械搅拌罐用钢;其性能满足了汽车搅拌罐用钢的使用要求,同卷性能波动小;用其替代Q345低合金高强度结构用钢后,搅拌罐重量减轻了19.74%,大大减少了能源消耗。     

基于粗糙集的数据聚类方法研究

RoughSets理论是一种新型的处理含糊和不确定性知识的数学工具,将RoughSets理论应用于知识发现中的聚类分析,给出了信息系统的约简、信息系统的可辨识属性矩阵和信息系统的辨识公式等定义,在此基础上提出了基于粗糙集的数据聚类算法RSDC,实验结果验证了该算法的可行性,并且对符号属性和数值属性数据都具有良好的聚类效果。     

安钢30MnSi钢的研制与开发

对30MnSi成分等进行了优化设计,分析了铸坯表面横裂纹产生的原因,采用合理的工艺优化措施并对设备进行了改进,生产出无缺陷铸坯,成功开发了预应力钢棒用30MnSi钢.     

原位添加α晶成核剂对高熔体强度聚丙烯性能的影响

采用过氧化苯甲酰(BPO)为引发剂,通过一步反应挤出法将接枝单体苯乙烯(St)和端乙烯基硅油(VS)接枝到等规聚丙烯(i PP)上制备高熔体强度聚丙烯(HMSPP),同时在制备过程中原位添加α晶成核剂S20或NA11,考察了两种不同的α晶成核剂对HMSPP的制备及其结晶性能、力学性能和发泡性能的影响。熔体流动速率和分子量分布的测试结果表明,S20或NA11的原位添加没有影响i PP接枝反应的进行;差示扫描量热研究表明,成核剂的加入可以有效促进HMSPP的成核结晶,消除了HMSPP结晶过程中的双结晶峰现象,但成核剂的加入对HMSPP的力学性能并无显著影响。S20或NA11的加入可以有效调控发泡样品的泡孔尺寸,使得泡孔直径从38μm增大到50μm以上,发泡倍率也分别从25倍增大到36倍和37倍。