Synthesis and Characterizations of Triphenylamine End-Functionalized Polymers via Reversible Addition-Fragmentation Chain Transfer Polymerization

A novel reversible addition-fragmentation chain transfer (RAFT) reagent bearing triphenylamine (TPA) group, 4-diphenylamino-dithiobenzoic acid benzyl ester (DDABE), was designed and synthesized. It was used in the RAFT polymerizations of styrene (St) and methyl acrylate (MA) to prepare end-functionalized polymers. The results of the polymerization showed that the RAFT polymerizations could be well controlled using DDABE as the RAFT agent. Number-average molecular weight (M_n,GPC) increased linearly with monomer conversion, and molecular weight distributions were relatively narrow (PDI< 1.50). The results of chain-extension reaction, ¹H NMR spectra and UV/Vis spectra confirmed that most of the polymers chains were end-capped by the functional triphenylamine (TPA) groups. The effect of feed molar ratios of St/DDABE/AIBN on polymerization was investigated.     

一种用模拟信道进行数字通信的方法

本文介绍了一种利用现有机载模拟通信设备进行数字通信的高性能机载报警系统。文中，着重论述了该系统在编码和解码技术方面，提高报警信号的抗干扰性、保密性、防止误码以及提高传输距离等关键技术；较详细地介绍了系统的工作原理及调制解调电路的特点。     

虚拟企业模型并行仿真研究

随着各种全新的制造理念,特别是虚拟企业的出现,企业模型的规模不断扩大,使目前存在的大多数企业模型仿真系统的效率大大下降。该文针对此问题,通过深入分析虚拟企业模型结构,并在已有的构件化企业建模体系CEMS及其仿真系统的基础上,结合异步仿真技术和多线程技术提出了一种分层式企业模型仿真体系结构,为虚拟企业模型的快速高效的仿真提供了一种有效的方法。     

基于机会约束的电动汽车充光储一体化充电站容量优化方法

针对电动汽车充电站建设运营成本高,土地利用率较低,功能单一的缺点,提出了电动汽车充光储一体化充电站的容量优化方法。考虑光伏出力及电动汽车充电负荷的不确定性,研究在不确定性环境下的容量配置问题,以保证优化方案的可靠性。基于机会约束规划,以建设运营成本最小为目标建立电动汽车充光储一体化充电站容量配置模型,通过序列运算理论将模型中含有随机变量的约束进行确定性转化,采用CPLEX作为模型的求解工具。算例验证了所提模型及方法的有效性。     

无机盐对新疆油田三元复合驱界面性能影响研究

界面性能对复合驱提高采收率有重大的影响,界面张力越低,洗油效率越高;Zeta电位越高,油水乳状液越稳定。研究了各类无机盐对新疆油田复合驱界面性能的影响。结果显示,Zeta电位的绝对值随着无机盐浓度的增高而增大;无机碱中,碳酸根离子降低界面张力效果最好,氢氧根次之,碳酸氢根最差;阳离子中,钾离子降低界面张力效果最好,其次是钠离子,镁离子会略微提高界面张力,钙离子则会大幅度提高界面张力;阴离子中,与硫酸根相比,氯离子能更好地降低界面张力。通过以上研究,确定了Q站污水处理站外排水更适合三元复合驱配液。     

CO2腐蚀的神经网络分析

利用神经网络的分析方法 ,对CO2 腐蚀进行分析建模 ,从系统的观点出发 ,建立了碳钢含碳量、CO2 分压、温度、流速与腐蚀速率之间的非线性对应关系 ,为准确的数学建模、预测设备的使用寿命和相关专家系统的研制开拓了新的思路     

载体预处理对Pd/C催化剂催化性能的影响

研究了活性炭硝酸表面改性对以其为载体制备的负载钯催化剂性能的影响。利用表面官能团滴定、N₂物理吸附和扫描电镜对催化剂进行表征，以邻硝基氯苯催化加氢制备2，2'-二氯氢化偶氮苯反应为模型反应对催化剂的性能进行评价。结果表明，经过不同浓度的HNO₃处理，活性炭孔结构性能变化不大，但是活性炭表面酸性含氧基团的浓度有了较大程度的增长，为Pd金属粒子的沉积提供了大量的吸附位，提高了Pd金属的分散度，从而制得高活性的Pd/C催化剂。通过30%HNO₃ 60 ℃水浴中回流4 h处理的活性炭可以达到最佳效果，所制得催化剂的活性是以未经硝酸处理过的活性炭载体制备的催化剂活性的2.3倍。     

浅谈预分解窑系统的用风

众所周知,风、煤、料、窑速的合理控制是稳定窑炉热工制度,生产优质高产熟料的关键。根据预分解窑特点,系统用风不仅要为煤粉充分燃烧提供足够氧气;尚需满足物料在预热预分解系统中悬浮所必须的风量风速;还要利用好冷却熟料经热交换后的高温空气回窑和炉助燃。从用风功能上,以预分解窑系统为基础划分为一次、二次和三次风;从燃烧器供风分为煤风、外风、内风及中心风(四通道时);以利用冷却机冷却风分为窑用二次风、炉用三次风和余风(或用于低温余热发电)。本文通过对窑系统三股风的分析,探讨合理用风问题。1一次风一次风定义为“用于将燃料喷…     

Automatic 3D Indoor Scene Updating with RGBD Cameras

Since indoor scenes are frequently changed in daily life, such as re‐layout of furniture, the 3D reconstructions for them should be flexible and easy to update. We present an automatic 3D scene update algorithm to indoor scenes by capturing scene variation with RGBD cameras. We assume an initial scene has been reconstructed in advance in manual or other semi‐automatic way before the change, and automatically update the reconstruction according to the newly captured RGBD images of the real scene update. It starts with an automatic segmentation process without manual interaction, which benefits from accurate labeling training from the initial 3D scene. After the segmentation, objects captured by RGBD camera are extracted to form a local updated scene. We formulate an optimization problem to compare to the initial scene to locate moved objects. The moved objects are then integrated with static objects in the initial scene to generate a new 3D scene. We demonstrate the efficiency and robustness of our approach by updating the 3D scene of several real‐world scenes.