从稳态到动态的空气调节

分析传统空调所提供的稳态参数微气候环境不一定能达到人的舒适和健康的要求,提出符合人本身生理习惯的空调送风方式应该是动态空气调节.认为个人可调节和适宜的环境渐变能同时保证舒适和健康两方面需要.     

Nd：MgO：LiNbO3晶体的荧光光谱及其双晶体腔内互倍频实验

采用激光感生荧光技术测量了Ｎｄ：ＭｇＯ：ＬｉＮｂＯ３晶体的偏振荧光光谱，简要地说明了Ｎｄ：ＭｇＯ：ＬｉＮｂＯ３双晶体腔内互倍频的基本原理，并在实验中用染料激光作泵浦源实现了其双晶体腔内互倍频运转；得到５４３ｎｍ横模倍频绿光单端输出约ＹＭＷ，腔前泵浦阈值约３８ＭＷ，总转换效率约为１．３％。     

环己酮直接合成环己酮肟——Ⅰ.钛层柱粘土催化环己酮氨肟化反应特征

钛层柱粘土(Ti-PILC)首次用于液相催化环己酮经氨肟化直接合成环己酮肟,氨肟化反应性能取决于制备Ti-PILC时钛源的选择和催化剂的孔结构。选择合适的反应条件,如反应介质、反应物投料比和催化剂量可进一步提高肟的选择性。     

Poly(3‐chlorothiophene) films prepared by the direct electrochemical oxidation of 3‐chlorothiophene in mixed electrolytes of boron trifluoride diethyl etherate and sulfuric acid

3‐Chlorothiophene (CT) was electrochemically polymerized in mixed electrolytes of a boron trifluoride diethyl etherate solution containing 0–20% (by volume) sulfuric acid. The oxidation potentials of the monomer in these media were measured to be only 1.06–1.31 V (vs Ag/AgCl). These values were much lower than that of CT in acetonitrile and 0.1 mol/L (Bu)₄NBF₄ (1.92 V vs Ag/AgCl). Poly(3‐chlorothiophene) (PCT) films with conductivities of 0.1–2 S cm^?1 were obtained. The structure, morphology, and electrochemical behavior of the PCT films also were investigated. © 2002 Wiley Periodicals, Inc. J Appl Polym Sci 87: 502–509, 2003     

Electrochemical polymerization of toluene in the mixed electrolytes of boron trifluoride diethyl etherate and trifluoroacetic acid

Poly(methylphenylene) (PMeP) films were prepared by direct oxidation of toluene in the mixed electrolytes of boron trifluoride diethyl etherate (BFEE) and trifluoroacetic acid (TFA). The oxidation potential of toluene in pure BFEE was measured to be 1.52 V versus saturated calomel electrode (SCE). This value was much lower than that determined in a neutral medium such as acetonitrile (2.13 V versus SCE). The introduction of TFA into BFEE decreased the oxidation potential of toluene and also improved the properties of as‐formed polymer films. Infrared and Raman spectra confirmed the formation of PMeP films. © 2004 Wiley Periodicals, Inc. J Appl Polym Sci 93: 189–195, 2004     

乔口镇土壤重金属Pb、Cd潜在生态风险评价

以长沙市望城区乔口镇周边农田土壤为研究对象,利用单因子评价法和潜在生态危害指数法对其土壤中Pb、Cd的含量进行生态风险评价。研究结果表明,乔口镇研究区域重金属Pb污染在可接受范围之内,而土壤中重金属Cd的累积程度较高,污染严重,已经对区域内的生态环境产生危害。同时,对周边农田土壤重金属的潜在生态风险研究发现,土壤重金属Cd的单因子潜在生态危害指数Ei处于40~160之间,且深度为0~20 cm的土样中Cd的单因子潜在生态危害指数均大于80,表明该元素存在强生态危险。从综合潜在生态风险危害指数RI来看,乔口镇综合潜在生态风险危害还在可接受范围之内。     

一种对基于Netfilter后门模块的检测方法

本文介绍了Netfilter框架,分析了利用Netfilter框架实现LKM后门模块的原理并给出了实现方法和步骤。文章同时引进并详细分析了一种针对Netfilter后门模块的检测方法,并给出了检测方法实现的过程。     

数字城市中景观照明虚拟设计与控制系统的构建

针对数字城市中有效管理景观照明的需求，本文提出了利用计算机技术和数字照明技术构建数字城市的景观照明虚拟设计与控制系统的构想，并对这样的系统的基本结构，内部通信协议内容及其运行方法进行了深入．的探讨。该系统具有城市级景观照明虚拟设计的功能，其设计结果可以通过构建合适照明通信协议直接应用于各单体景观照明系统的控制。     

改良柱前荧光胺衍生化-高效液相色谱法测定猪肉中11种磺胺类药物残留

建立改良的磺胺类药物与荧光胺反应的衍生化方法,并应用于猪肉中11种磺胺类药物的高效液相色谱-荧光法测定.选用0.1 mol/L KH2PO4溶液(pH 3.0)0.8 mL、0.3 mg/mL荧光胺溶液0.2 mL与磺胺类药物发生衍生化反应,4℃避光反应40 min,得到磺胺-荧光胺衍生产物.该衍生化方法稳定、可靠,衍...