Solar Photocatalytic Degradation of Textile Dyes in TiO2 Suspended Solutions

The degradation and decolourization of direct dye (Everdirect supra turguoise blue, FBL), acidic dye (Isolan orange S-RL) and vat dye (Indanthren red FBB) have been investigated by solar/TiO2 process. The effects of solution pH, dye concentration, dosage of TiO2 and nano-size of TiO2 have been studied. The increase in initial pH (3, 5 and 11) and dye concentration decrease the removal rate. The treatment for FBB and FBL dye solutions is more efficient than that of S-RL.Under optimum conditions, the color removal is found to be almost complete for FBB and FBL while that of S-RL also reaches 95%. Langmuir adsorption isotherm and modified Langmuir-Hinshelwood kinetic model (L-H model) have been fitted to the experimental data and found to correlate the adsorption patterns as well as the kinetics of the dyes studied.     

光纤信息传输技术军事应用分析

综述了最近20年来国外发达国家在光纤通信技术军事应用方面的最新研究、应用进展,重点分析了高速光纤网、光纤水听器、综合航电系统光纤数据总线、光控操纵飞行系统等几项在航海、航空领域具有较大军事应用前景的光纤新技术.     

Large‐eddy simulations of the evolution of imposed turbulence in forced boundary layers in a very long domain

The technique of using imposed turbulence in combination with a forced boundary layer in order to model the atmospheric boundary layer is analyzed for a very long domain using large‐eddy simulations with different combinations of prescribed velocity profiles and pregenerated turbulence fields based on the Mann model. The ambient flow is first studied in the absence of wind turbines. The velocity profiles undergo a transition throughout the domain with a velocity increase of 10% to 15% close to the ground far downstream in the domain. The turbulence characteristics close to the turbulence plane are, as expected, similar to those of the added Mann turbulence. The turbulence will then undergo a transition throughout the domain to finally reach a balance with the shear profile at a certain downstream distance. This distance is found to depend on the turbulence level of the added Mann turbulence planes. A lower Mann turbulence level generally results in a shorter “balancing” distance. Secondly, a row of 10 turbines is imposed in the simulations at different distances from the plane of turbulence in order to determine how the distance affects wake conditions and power production levels. Our results show that a “balancing” distance is needed between the turbulence plane and the first turbine in the row in order to ensure nonchanging ambient conditions throughout the turbine row. This introduces an increase in the computational costs. The computational cost for the forced boundary technique is normally lower compared with using precursor simulations, for longer domains; however, this needs to be verified further.     

竹叶黄酮对小鼠脾细胞免疫的分子机制研究

目的：研究竹叶黄酮对小鼠脾细胞的免疫作用。方法：采用分子免疫学、细胞生物学和分子生物学等多种技术评价了竹叶黄酮对小鼠的免疫增强作用。结果：在一定剂量范围内竹叶黄酮可促进小鼠脾脏细胞DNA和蛋白质的合成，促进了细胞的增殖，同时促进了小鼠脾细胞IFNγmRNA的表达，IFNγ的产生与分泌，IFNγ又反过来激活NK细胞，促进T、B细胞分化和CTL成熟，刺激B细胞分泌抗体。结论：一定剂量的竹叶黄酮能增强小鼠的免疫调节能力，并呈明显的剂量效应关系。     

具有部分界面等电势浮空埋层的高压SOI PLDMOS

A novel silicon-on-insulator（SOI） high-voltage pLDMOS is presented with a partial interface equipotential floating buried layer（FBL） and its analytical model is analyzed in this paper.The surface heavily doped p-top layers,interface floating buried N⁺/P⁺ layers,and three-step field plates are designed carefully in the FBL SOI pLDMOS to optimize the electric field distribution of the drift region and reduce the specific resistance.On the condition of ESIMOX（epoxy separated by implanted oxygen）,it has been shown that the breakdown voltage of the FBL SOI pLDMOS is increased from—232 V of the conventional SOI to—425 V and the specific resistance R_on,sp is reduced from 0.88 to 0.2424Ω·cm².     

基于UDS的ECU在线重编程设计与实现

结合国内外OEM厂商广泛采用的诊断协议UDS,对Can总线下的ECU在线重编程进行研究和设计,并对具体的软件实现进行阐述。本方案能防止ECU在线重编程过程中出现异常时,ECU被锁死;可自恢复,刷新功能永不丢失。     

聚苯胺改性活性炭粒子电极的光电催化性能

以苯胺、活性炭为原料,利用原位聚合法制备聚苯胺(PANI)改性活性炭(AC)粒子电极(PANI/AC),采用扫描电子显微镜(SEM)、透射电镜(TEM)、X射线衍射仪(XRD)和红外光谱(FTIR)对该粒子电极的形貌、晶体结构和组成进行了表征,并将其应用于直接耐晒翠蓝GB的光电催化降解实验。考察了PANI复合量、粒子电极用量、电流密度、pH和GB初始浓度等对降解率的影响,并考察了GB在不同催化条件下的降解反应。结果表明:在光电协同催化条件下,当苯胺与活性炭质量比为0.3∶0.7,粒子电极质量浓度为9 g/L,电流密度为8 mA/cm2,pH为3时,PANI/AC对质量浓度为20 mg/L的GB溶液的降解率达到95.47%。     

自由电子激光器中相对论电子与wiggler同轴性的要求

讨论了自由电子激光器中,相对论电子束与wiggler的轴线有小夹角时激光增益的变化,并给出了最大容许偏角。     

浅谈海底光缆的分类

对海底光缆按应用范围、纤芯和有无中继器进行了分类,对几种常用海底光缆进行了比较,介绍了主流厂商海底光缆张力指标及海底光缆常用光纤主要性能指标。