Web Service技术在移动通信商务手机终端的应用

提出了一个Web Service技术在手机终端的应用模型.利用Sun公司提供的WTK251工具将服务器端生成的WSDL服务文件转化为相应的Java代码,再利用JavaME提供的API封装Java服务方法,根据Soap和Http协议,以及移动网和互联网建立起手机终端和服务器之间的数据交互,有效地实现了Web Service技术在乎机终端和应用服务之间的应用.     

Removal of lead and cadmium ions by single and binary systems using phytogenic magnetic nanoparticles functionalized by 3-marcaptopropanic acid

The present research study is focused on green fabrication of superparamagnetic Phytogenic Magnetic Nanoparticles(PMNPs), and then its surface functionalization with 3-Mercaptopropionic acid(3-MPA). The resulting material(i.e. 3-MPA@PMNPs) characterized by FTIR, powder XRD, SEM, TEM, EDX, VSM, BET and TGA techniques and then further employed for the investigation of the adsorptive removal of lead(Pb~(2+)) and cadmium(Cd~(2+)) ions from aqueous solutions in single and binary systems. The material showed fastest adsorptive rate(98.23%) for Pb~(2+) and(96.5%) Cd~(2+)within the contact time of 60 min at pH 6.5 in the single system. The experimental data were fitted well to Langmuir isotherm, indicated monolayer adsorption of both metal ions onto 3-MPA@PMNPs and an estimated comparable adsorptive capacity of 68.41 mg·g~(-1)(Pb~(2+)) and 79.8 mg·g~(-1)(Cd~(2+)) at p H 6.5. However, kinetic data agreed well with pseudo-second-order model, and indicated that the removal mainly supported chemisorption and/or ion-exchange mechanism. Thermodynamic parameters such asΔGo, ΔHo, and ΔSo, were-3259.20, 119.35 and 20.73 for Pb2+, and-1491.10, 45.441 and 7.87 for Cd~(2+) at temperature 298.15 K, confirmed that adsorption was endothermic, spontaneous and favorable. The material demonstrated higher selectivity of Pb~(2+) and its removal efficiency was(98.20 ± 0.3)% in binary system experiments. The material persisted performance up-to seven(07) consecutive treatment cycles without losing their stability and offered comparable fastest magnetic separation(35 s) from aqueous solutions. Therefore, it is recommended that the prepared material can be employed to remove toxic heavy metal ions from water/wastewaters and this "green" method can easily be implemented at large scale in low economy countries.     

Hydrothermal synthesis of a novel microporous framework sustained by polycatenated [CuI2(ip)(4,4′-bipyridine)]n (ip = isophthalate) ladders

A novel ladder coordination polymer [Cu^I₂(ip)(4,4^′-bipyridine)] · 3.5H₂O (1) (ip=isophthalate) was prepared via redox reaction under hydrothermal conditions and characterized by single-crystal X-ray diffraction analysis. In the crystal structure of 1, each ring of the ladder is interlocked by two different, symmetry-related ladders, and the polycatenation of ladders forms a 3D network with rhombic channels clathrating water molecules.     

滴定-凝胶法制备球形水凝胶吸附材料及其在废水处理中的应用

滴定-凝胶法制备球形水凝胶吸附材料具有3D倒漏斗状微观形貌结构，孔径分布宽泛，对水体中重金属、染料等污染物具有快速响应机制，已被广泛用于水处理过程研究。综述了滴制法制备球形水凝胶吸附材料的主要过程机理、水凝胶具有的特殊形貌结构及其在水处理过程中的应用，分析了球形水凝胶吸附材料在水处理应用过程中存在的问题和局限，并指出了其在水处理领域的应用前景及发展方向。     

Novel luminescent heterobimetallic Ln–Cu(I) 3D coordination polymers based on 5-(4-pyridyl) isophthalic acid as heteroleptic ligand. Synthesis and structural characterization

Six novel photoluminescent Ln–Cu(I) heterobimetallic 3D coordination polymers, [LnCu (pyip^2 −)₂(H₂O)]_n (1–6) (where Ln is Pr, Nd, Sm, Eu, Gd, Ho, respectively, and H₂pyip = 5-(4-pyridyl) isophthalic acid) have been synthesized in a concise and reproducible manner under hydrothermal conditions. All of these substances were fully characterized by appropriate spectroscopic methods and elemental analysis. Structural determinations revealed that 1–6 are isomorphic and display 3D frameworks. Luminescent properties of the obtained compounds have been studied in detail revealing light emissions of warm white, cool white and light blue for 3, 4 and 5, respectively. The effectiveness of association of a rare earth with a transition metal in producing valuable luminescent materials for practical applications is demonstrated.     

固体超强酸SO42-/SnO2-Al2O3的制备及结构表征

采用共沉淀法制备了固体超强酸SO42-/SnO2-Al2O3.通过XRD、BET、FT IR、TG等手段对其结构进行了表征,将其用于苯甲醚的苯甲酰化反应初步研究了其催化性能.XRD结果表明,在催化剂最佳性能的活化温度500 ℃时,样品结晶不完全,随着锡铝原子摩尔比的增加,表面主要显现四方晶型的二氧化锡:在锡铝摩尔比为9∶1时,随着活化温度的提高,结晶逐渐趋于完善,结合FT IR结果可知,在700 ℃以上样品表面结合硫酸根已基本分解完毕.BET结果表明,引入铝可以增加SO42-/SnO2的比表面积,随着活化温度的提高,样品的比表面积呈现先上升后下降的趋势,在最佳性能活化温度时达到最大值.FT IR结果显示,表面硫酸根是以螯合和桥式两种方式和锡配位结合,但是起催化活化中心的大部分是和硫酸根以螯合双齿结合的锡.     

关于色情视频行为的特征、性质及其犯罪化的思考

色情视频行为具有虚拟性,非接触性,互动性,戏剧性等特点,因而有别于现实当中的色情行为。色情视频行为可以分为合法的虚拟性行为和非法的虚拟性行为,不能将色情视频行为都视作是违法的,犯罪的行为。对于一部分具有严重社会危害性的色情视频行为,建议纳入刑罚调整范畴,予以打击,以净化网络环境。     

基于图像的信息隐藏技术综述

随着信息技术的发展,信息隐藏技术已成为信息安全领域的一个重要内容。介绍了基于图像的信息隐藏的基本原理、一般要求、常见技术及具体应用,提出图像隐藏技术将会更大范围地应用于民用与商用。     

基于OLAP的学生就业指导数据分析

对数据仓库、联机分析处理（OLAP）的概念进行了简单的介绍，结合实际项目构建数据仓库，利用Excel的数据透视表来实现数据分析功能。此方案摆脱了以往进行数据库操作的复杂性，做到了一般会熟练使用计算机的用户都可以轻松进行操作。