基于Silver light的计算机基础课程网络练习系统的设计与实现

计算机基础课程是高校学生必修课程之一,网络课堂在基础课程中的普遍应用,学生对虚拟教学的交互性的要求越来越高,传统的以数据为中心,以HTML为表现形式的Web网络教学应用程序已远不能满足学习者更高的、全方位的体验要求,而RIA及微软Silver light技术平台的出现正好为这个问题提供了很好的解决途径。文章重点介绍了如何通过微软的Silver light技术来设计和实现高度交互的网络练习系统。

Resonance Light Scattering Spectra of Silver Thiocyanate System and its Application in Analysis

A novel determination method of Ag+ was established. In acetic acid-sodium acetate buffer (pH 5.0) medium, Ag+ reacts with SCN- to form AgSCN in the presence of TritonX-100,which results in an increase of resonance light scattering (RLS) and giving a new RLS spectrum.The maximum RLS peak was at 585 nm. The enhancement of resonance light scattering at 585nm was proportional to the concentration of Ag+ ranging from 0.0045-4.00 μg mL-1 (r=0.9991),and the detection limit was 1.37 ng mL-1 with the recovery of 97.70%～104.80%.

基于Silverlight的WEB网络游戏开发

WEB网络游戏让用户在任何地方只需打开浏览器即可进入游戏,它是将丰富互联网应用程序(RI-A)技术发挥到极致的一种具体应用.Microsoft Silverlight是.NET Framework为下一代WEB及移动设备提供的用于生成和提供跨浏览器,跨平台的媒体体验和丰富互交互式应用程序(RIA)的开发框架.研究如何以Sil-verlight技术实现WEB网络游戏.

Efficiency-enhanced AlGaInP light-emitting diodes using transparent plasmonic silver nanowires

Silver nanowire(AgNW) networks have been demonstrated to exhibit superior transparent and conductive performance over that of indium-doped tin oxide(ITO) and have been proposed to replace ITO, which is currently widely used in optoelectronic devices despite the scarcity of indium on Earth. In this paper, the current spreading and enhanced transmittance induced by AgNWs, which are two important factors influencing the light output power, were analyzed. The enhanced transmittance was studied by finite-difference time-domain simulation and verified by cathodoluminescence measurements.The enhancement ratio of the light output power decreased as the Ga P layer thickness increased, with enhancement ratio values of 79%, 52%, and 15% for Ga P layer thicknesses of 0.5 μm, 1 μm, and 8 μm, respectively, when an AgNW network was included in Al Ga In P light-emitting diodes. This was because of the decreased current distribution tunability of the AgNW network with the increase of the Ga P layer thickness. The large enhancement of the light output power was caused by the AgNWs increasing carrier spread out of the electrode and the enhanced transmittance induced by the plasmonic AgNWs. Further decreasing the sheet resistance of AgNW networks could raise their light output power enhancement ratio.

游戏碰撞逻辑在SilverLight中的应用

文章以网络游戏对战平台为背景,介绍了把游戏碰撞检测技术应用到RIA(Rich Internet Application,富互联网应用系统)中的技术,RIA采用微软最新发布的SilverLight平台,SilverLight使网页能够呈现出动画、视频流、用户交互的特性,必将引起Web技术的革命。文章对从事网页游戏制作的技术人员有一定的帮助。

红光联合银离子敷料治疗慢性难愈合创面的最佳方案筛选及机制

背景:临床上多采用红光照射和银离子敷料治疗慢性难愈合创面,但是红光照射联合银离子敷料治疗慢性难愈合创面的最佳照射时间和不同银离子敷料的组合尚未确定。目的:探讨红光联合银离子敷料治疗大鼠慢性难愈合创面的最佳照射时间与敷料组合。方法:取SD大鼠,采用全层皮肤缺损+创面涂抹金黄色葡萄球菌+皮下注射氢化可的松的方式制作慢性难愈合创面模型。采用随机数字表法将造模成功的72只大鼠随机分为4组,每组18只:在创面标准换药的基础上分别给予红光照射20 min+脂质水胶体硫酸银敷料覆盖(A1B1组)、红光照射20 min+藻酸钙纤维银敷料覆盖(A1B2组)、红光照射30 min+脂质水胶体硫酸银敷料覆盖(A2B1组)、红光照射30 min+藻酸钙银纤维敷料覆盖(A2B2组),每24 h换药、照射一次并更换敷料。连续治疗14 d后,检测各组大鼠创面愈合率、细菌菌落数、炎症反应、组织形态学及血管新生情况。结果与结论:①随着治疗时间的延长,4组大鼠创面愈合率增加,A2B2组大鼠治疗后3,7,14 d的创面愈合率高于其他3组(P<0.05);②治疗后第7天的创面细菌培养结果显示,A2B2组细菌菌落数低于其他3组(P<0.05);Western-blotting检测显示,随着治疗时间的延长,4组大鼠创面组织中肿瘤坏死因子α、白细胞介素6的蛋白表达均下降,白细胞介素10的蛋白表达均升高,A2B2组肿瘤坏死因子α、白细胞介素6的蛋白表达低于其他3组(P<0.05),白细胞介素10的蛋白表达高于其他3组(P<0.05);③治疗后第14天的创面苏木精-伊红染色显示,A2B2组可见大量的胶原纤维平行分布且连接最紧密,明显优于其他3组;④治疗后第7天的创面免疫荧光染色显示,A2B2组CD31荧光强度表达高于其他3组(P<0.05);治疗后3,7,14 d的q-PCR检测显示,A2B2组血管内皮生长因子a、血管内皮生长因子受体2的mRNA表达均高于其他3组(P<0.05);治疗后3,7,14 d的Western-blotting检测显示,A2B2组血管内皮生长因子a、血管内皮生长因子受体2的蛋白表达均高于其他3组(P<0.05);⑤结果表明,红光照射30 min联合藻酸钙银纤维敷料治疗慢性难愈合创面的效果更优。

片状银粉制备方法的研究进展

片状银粉作为银浆的重要组成部分,其制备方法得到了广泛研究。阐述了片状银粉制备方法,包括机械球磨法、光诱导法和模板法等3种方法的工艺原理,分析了各方法的优缺点,并对机械球磨法和模板法的研究方向进行了展望,以期为片状银粉的制备提供参考。

Perovskite-Inspired Lead-Free Ag2BiI5 for Self-Powered NIR-Blind Visible Light Photodetection

In recent years,solution-processible semiconductors with perovskite or perovskite-inspired structures have been extensively investigated for optoelectronic applications.In particular,silver-bismuth-halides have been identified as especially promising because of their bulk properties and lack of heavily toxic elements.This study investigates the potential of Ag2BiI5 for near-infrared(NIR)-blind visible light photodetection,which is critical to emerging applications(e.g.,wearable optoelectronics and the Internet of Things).Self-powered photodetectors were realized and provided a near-constant≈100 mA W−1 responsivity through the visible,a NIR rejection ratio of>250,a long-wavelength responsivity onset matching standard colorimetric functions,and a linear photoresponse of>5 orders of magnitude.The optoelectronic characterization of Ag2BiI5 photodetectors additionally revealed consistency with one-center models and the role of the carrier collection distance in self-powered mode.This study provides a positive outlook of Ag2BiI5 toward emerging applications on low-cost and low-power NIR-blind visible light photodetector.

Improving power conversion efficiency of perovskite solar cells by cooperative LSPR of gold-silver dual nanoparticles

Enhancing optical and electrical performances is effective in improving power conversion efficiency of photovoltaic devices. Here, gold and silver dual nanoparticles were imported and embedded in the hole transport layer of perovskite solar cells. Due to the cooperative localized surface plasmon resonance of these two kinds of metal nanostructures, light harvest of perovskite material layer and the electrical performance of device were improved, which finally upgraded short circuit current density by 10.0%, and helped to increase power conversion efficiency from 10.4% to 11.6% under AM 1.5G illumination with intensity of 100 m W/cm^2. In addition, we explored the influence of silver and gold nanoparticles on charge carrier generation, dissociation, recombination, and transportation inside perovskite solar cells.

High-Performance Room-Light-Driven β-AgVO3/mpg-C3N4 Core/Shell Photocatalyst Prepared by Mechanochemical Method

A new highly efficient, visible light active, silver vanadate/polymeric carbonitride “core/shell” photocatalyst was prepared mechano-chemically prepared by grinding mixtures of β-silver vanadate and mesoporous graphitic carbonitride. Besides the core/shell photocatalyst, β-silver vanadate/mesoporous polymeric carbonitride composites and supported mpg-C3N4@β-silver vanadates were prepared. The materials were characterized by transmission electron microscopy (TEM), X-ray diffraction (XRD), nitrogen ad- and de-sorption, diffuse reflectance UV-Vis measurement (DRS), infrared spectroscopy, Raman microscopy, and time-resolved photoluminescence spectroscopy. The photocatalytic performance of the materials was investigated in the degradation of organics using pharmaceutical ibuprofen and 4-(isobutyl phenyl) propionic acid sodium salt as model compounds under batch conditions. Reaction intermediates were studied by electrospray ionization and time-of-flight mass spectrometry (ESI-TOF-MS). Additionally, the degree of mineralization was determined by total organic carbon TOC measurements. The core/shell photocatalyst has shown superior photocatalytic activity compared to the other prepared composites or supported photocatalysts as well as the single mpg-C3N4. Scavenger experiments showed that valence band holes and anionic superoxide radicals are the main active species in the photocatalytic process. TOC measurement confirmed the mineralization of the organic compound, which was in line with ESI-TOF-MS experiments. Time-resolved photoluminescence measurements indicated that charges generated in carbonitride migrate via diffusive hopping and exhibit increased mobility in the case of the silver vanadate/polymeric carbonitride composite.

LIGHT-SCATTERING STUDY OF POLYELECTROLYTE HOLLOW CAPSULES

Silver halide (AgX) microcrystal was used as template to synthesize hollow polyelectrolyte capsules. These hollow capsules were characterized by laser light scattering (LLS) used to measure the size of the capsules in solution. The ratio of hydrodynamic radius (R h ) from dynamic LLS to the radius of gyration (Rg) from static LLS is almost unity, revealing that the entities are hollow in solution. The results suggest that the LLS method can be regarded as a good complement to the confocal laser scanning microscopy (CLSM) method for the characterization of small hollow capsules, and it possesses the advantage of not needing fluorescence labeling.

脉冲激光起爆光敏炸药特性

光敏炸药乙炔银-硝酸银加载技术是模拟强脉冲X射线结构响应的重要手段之一,采用脉冲激光起爆是一种不同于传统的闪光高压起爆方式,其优势在于增强了操作可控性、异型加载实现性和同时加载时效性。对激光起爆机理进行针对性分析,介绍激光起爆平台和乙炔银-硝酸银材料性质。针对光敏炸药的光吸收特性开展激光起爆实验,获得193 nm/266 nm/532 nm/1064 nm等波长激光起爆阈值分别为5.07 mJ/mm^(2)、6.77 mJ/mm^(2)、7.21 mJ/mm^(2)、10.61 mJ/mm^(2),并通过爆速验证完全爆轰过程,用辐射光谱分析表征反应过程元素生成。所得成果对于脉冲激光起爆过程、机理及爆炸载荷规律研究,以及光敏炸药模拟X射线结构响应加载技术具有很好的技术支持作用。

镀银玻璃镜用钝化剂研究进展

为了提高镀银玻璃镜镜背涂料和镀银层之间的附着力,在镀银层上必须用钝化剂钝化镀银层,但现有钝化剂的使用造成镀银玻璃镜生产过程中的废水排放量增大。因此,开发环境友好的钝化剂很有现实意义。本文对镀银玻璃镜钝化剂的发展过程中的文献进行了梳理,虽然无铜镀银钝化剂解决了镀银玻璃镜镀铜层钝化剂生产过程中铜离子对环境的污染问题,但还是会产生有害的废水,而且生产工艺比采用镀铜层钝化剂更复杂和耗时耗能。因此,镀银玻璃镜镀银层的钝化剂应向高交联反应的有机高分子钝化剂和真空磁控溅射镀金属钝化剂方向发展才能真正解决镀银玻璃镜的环境污染问题。

基于强脉冲光烧结的纳米颗粒银导线力学和电学性能

打印后烧结工艺是影响柔性银导线力学和电学性能的关键因素之一,其中非接触式的强脉冲光(IPL)烧结有着广阔的应用前景。采用多尺度银纳米颗粒导电墨水通过喷墨打印系统制备银导线,并应用强脉冲光烧结系统进行烧结,同时使用热压烧结进行对比研究。结果表明,当脉冲数量为3、总能量密度为5.358 J/cm^(2)时,由于单次脉冲的过量能量导致打印银线出现失效断裂。进一步对烧结参数进行优化,当脉冲数为12、总能量密度为6.173 J/cm^(2)时,打印银线的电阻率为15.228μΩ·cm。与热压烧结相比,强脉冲光烧结后样品的耐弯曲疲劳性能更加稳定,在一些样品不可直接接触的应用场景下有较大的应用潜力。

银掺杂TiO_(2)可见光催化剂的制备与表征

制备了Ag掺杂二氧化钛可见光催化剂(Ag/TiO_(2)),优化了Ag掺杂量、焙烧温度、焙烧时间等制备条件,采用SEM、EDS、XRD、FT-IR、TGA等对Ag/TiO_(2)进行了表征。结果表明,在Ag掺杂量为1.0%、焙烧温度800℃、焙烧时间3h的优化条件下,Ag/TiO_(2)在可见光下降解40mg/L的亚甲基蓝,降解率达到了96.85%,与TiO_(2)在紫外光条件下的光催化降解相当。表征结果表明,Ag被成功地掺杂到了粒子表面,且在TiO_(2)的表面缔合,这有效地拓宽了TiO_(2)在可见光区的吸收,增强了Ag/TiO_(2)光催化剂的光谱响应,大幅度提高了Ag/TiO_(2)在可见光下的催化活性。

银基玻璃抗菌剂/硅胶复合材料的制备与性能研究

以硅胶和玻璃系纳米银离子抗菌剂为原料,采用共混法制备了一系列抗菌剂含量为0.2 wt%~1.0 wt%的银基玻璃抗菌剂/硅胶复合材料,并研究了其耐热性能、力学性能、透过率和抗菌性能.结果表明,添加抗菌剂1.0 wt%的硅胶复合材料,其5%热分解温度位于459℃,较未添加抗菌剂有所提高;拉伸强度和拉伸弹性模量随抗菌剂含量增加而出现略微下降,分别为4.42~3.35 MPa, 1.13~1.02 MPa;透光性测试显示,随着抗菌剂的增加,透光性逐渐下降,但整体保持半透明状态,其中抗菌剂添加量为0.2 wt%样品的透过率为58%;硅胶复合材料抗菌性能测试结果显示,抗菌剂低添加量就可对大肠杆菌起到良好的抑制作用,1.0 wt%抗菌剂添加的样品抗菌率达到了99.68%,且在80℃高温水浴1 h后,其抗菌性能无明显影响.

饱和多酸基银簇的制备、表征及性能研究

对甲基苯硫酚与可溶性银盐在有机溶液中反应,生成银簇化合物。同时选择3种饱和型多金属氧酸盐,采用常压溶剂法合成多酸基银簇化合物,并对化合物进行表征和光催化性能研究。实验表明多酸和银簇的复合显著提高了化合物对光的吸收,化合物3对罗丹明的脱色率最高,化合物1和化合物2对罗丹明没有脱色效果。

LED水汽侵蚀失效分析

通过I-V特性曲线测试、机械开封、光学观察、扫描电镜及能谱分析、切片观察和红墨水试验等测试手段,对失效LED和正常LED进行了测试,并对测试结果进行了对比分析。结果显示失效样品I-V特性曲线异常;存在短路现象,电镜观察失效样品芯片表面出现树枝状银物质,同时观察到支架与环氧胶界面存在缝隙,由此推断出水汽入侵路径。结合失效背景,得出LED灯珠失效原因为LED支架与环氧胶的界面存在缝隙,水汽通过缝隙侵入,在电场作用下,芯片正极发生银迁移,导致样品失效。并提出了相应的改进措施,对于提高LED产品的可靠性具有一定的参考意义。

Ag@AgBr光催化剂的制备及其可见光催化降解亚甲基蓝反应性能

采用沉积-沉淀及光还原法制备了Ag@AgBr等离子体光催化剂,利用X射线衍射、扫描电镜和紫外-可见漫反射光谱对其进行了表征,并考察了该等离子体光催化剂在可见光(λ>420nm)下的催化性能,探讨了催化剂用量、pH值、亚甲基蓝初始浓度、H2O2添加量、循环使用及捕获剂对Ag@AgBr催化性能的影响.结果表明,当亚甲基蓝的初始浓度为10mg/L,催化剂用量为1g/L,pH=9.8时,光照12min后,亚甲基蓝的降解率高达96%,且样品经5次循环使用后活性基本保持不变;而少量H2O2的添加对光催化活性影响不大,过量的H2O2会降低光催化活性;乙二胺四乙酸捕获空穴后比异丙醇捕获·OH后的光催化活性降得更低.同时,对Ag@AgBr等离子体光催化剂可见光降解亚甲基蓝的催化机理进行了分析.

瓦氏黄颡鱼和鲢对光照强度和颜色的选择

以野生瓦氏黄颡鱼和人工养殖鲢为研究对象,设置4种光照强度梯度0—10、10—30、100—200、700—800 lx及4种光照颜色红、白、蓝、绿,采用单因子实验法,研究了瓦氏黄颡鱼和鲢对光的趋避行为。结果表明:在光照强度选择的实验中,瓦氏黄颡鱼在0—10、10—30、100—200和700—800 lx四个光照强度中出现的次数百分比分别是:78.33%±21.51%、10.00%±14.86%、7.33%±8.27%和4.33%±7.74%。瓦氏黄颡鱼在光照强度为0—10 lx的区域中出现的次数明显多于其他三种光照强度,且差异显著(P<0.05)。而鲢在四种光照强度中出现的次数之间不存在显著性差异(P>0.05)。在光照颜色选择实验中,瓦氏黄颡鱼在四种光照颜色中出现的次数百分比不存在显著性差异(P>0.05)。鲢在红、白、蓝和绿四种光照颜色中出现的次数百分比分别是:12.67%±13.63%、30.33%±18.47%、35.67%±24.73%、21.33%±15.02%。鲢在白光、蓝光区域出现的次数显著高于其他两种区域,且差异显著(P<0.05)。实验通过研究光照强度和光照颜色对瓦氏黄颡鱼和鲢行为的影响,为鱼类趋光性研究提供一定的参考。