基于氧杂蒽结构可控官能化的荧光探针研究新进展

荧光分子探针技术在表达分子间识别行为及复杂生命和环境体系的内状态信息方面具有非常优异的性能,氧杂蒽及其衍生物螺连隐色体结构变化伴随的分子荧光变换模型,广泛且深入的应用于构建新型功能光敏探针分子.近年来此类探针的合成设计及功能化调控研究异常活跃,新的突破不断涌现.综述了新近基于氧杂蒽及其衍生物的荧光探针在金属阳离子、pH、阴离子识别检测方面的研究进展,并简要阐释了该类探针分子的构筑,识别检测机理以及探针在生物成像和环境监测等方面的应用.     

Transverse profile expansion and homogenization at target for the injector Scheme-Ⅰ test stand of China-ADS

For the injector Scheme-Ⅰ test stand of the China-ADS (Accelerator Driven subcritical System), a beam with the maximum power of 100 kW will be produced and transported to the beam dump. To solve the very high thermal load problem at the dump, two measures are taken to deal with the huge power density at the target. One is to enlarge the contact area between the beam and the target, and this is to be accomplished by expanding the beam profile at the target and using slanted target plates. The other is to produce a more homogenous beam profile at the target to minimize the maximum power density. Here the beam dump line is designed to meet the requirement of beam expansion and homogenization at 3 different energies (3.2 MeV, 5 MeV and 10 MeV), and the step-like field magnets are employed for the beam spot homogenization. Taking into account the fact that the space charge effects are very strong at such low beam energies, the simulations have included space charge effects and errors which show that the beam line can meet the requirements very well. In the meantime, the alternative beam design using standard multipole magnets is also presented.     

液晶技术走向何方

液晶技术仍将迅速发展。一方面向高清晰度方向发展,在突破ＸＧＡ模式之后,努力向ＨＤＴＶ的２０００线清晰度迈进;另一方面向大屏幕化发展,在目前１５英寸商品化后,将会尽快将２１英寸商品化;此外,液晶技术和等离子ＰＤＰ彩色显示器件的结合将揉合双又方的优点几年后将会出现商品化的 ４０英寸以上的液晶ＰＤＰ,在超大屏幕高清晰度显示器件方面成为ＰＤＰ、ＣＲＴ的有力竞争者。 技术方向 １、低温Ｐｏ－ＳｉＴＦＴ 一般ＴＦＴ驱动电路的实际装载方法为ＴＡＢ—ＣＯＧ－ＭＬ１,它最终将走向驱动电路和液晶板的一体化。为达到这一目…     

某型机载预警雷达盲区计算模型研究

针对某型机载预警脉冲多普勒体制雷达本身的缺陷,对径向速度边界值进行计算,对盲区进行建模,对影响机载雷达盲区大小的各参数进行分析并进行仿真,结果表明模型能够准确地反映该型雷达的探测盲区.该模型已应用于作战训练,实践表明模型能帮助战勤人员了解战场态势,判断特定目标是否进入盲区,有利于战勤人员根据理论盲区指示采取相应的情报处理和协同处置措施,以便对重要目标进行跟踪和监视.如果敌方使用该型雷达,模型也可以作为突袭敌方目标时的理论基础依据.     

Transverse profile expansion and homogenization at target for the injector Scheme-I test stand of China-ADS

For the injector Scheme- test stand of the China-ADS(Accelerator Driven subcritical System), a beam with the maximum power of 100 k W will be produced and transported to the beam dump. To solve the very high thermal load problem at the dump, two measures are taken to deal with the huge power density at the target.One is to enlarge the contact area between the beam and the target, and this is to be accomplished by expanding the beam profile at the target and using slanted target plates. The other is to produce a more homogenous beam profile at the target to minimize the maximum power density. Here the beam dump line is designed to meet the requirement of beam expansion and homogenization at 3 different energies(3.2 Me V, 5 Me V and 10 Me V), and the step-like field magnets are employed for the beam spot homogenization. Taking into account the fact that the space charge effects are very strong at such low beam energies, the simulations have included space charge effects and errors which show that the beam line can meet the requirements very well. In the meantime, the alternative beam design using standard multipole magnets is also presented.     

基于认知网络资源接纳控制技术分析

在研究认知网络结构和资源接纳控制功能架构的基础上,对具有资源接纳控制功能的认知网络进行了体系结构分析和框架设计,介绍了基于OPNET仿真软件平台的仿真模型组成,描述了仿真运行过程。进行仿真场景设计并运行仿真,对引入资源接纳控制后的认知网络通信性能进行了仿真结果分析和评估。     

Soliton excitations and chaotic patterns for the (2+1)-dimensional Boiti-Leon-Pempinelli system

By improved projective equation approach and a linear variable separation approach, a new family of exact solutions of the (2+1)-dimensional Boiti-Leon-Pempinelli (BLP) system is derived. Based on the derived solitary wave solution, some dromion and solitoff excitations and chaotic behaviours are investigated.     

广播建筑工程在设计阶段应加强限额设计

文章对广播建筑工程设计阶段在投资控制方面存在的问题进行了分析,提出了在建筑工程设计阶段应加强限额设计,介绍了限额设计的概念、过程和控制途径,同时针对限额设计方法应用中存在的不足和完善应用的方法阐明了自己的观点。     

Crystal Structures,Thermal Behaviors and Biological Activities of Acylhydrazone Compounds Containing Pyrazine Rings and Halogen Atoms

Three new kinds of acylhydrazone compounds(C_(12)H_(10)FN_5O·H_2O,1;C_(12)H_(10)Cl N_5O·2CH_3COOH,2;C_(12)H_(10)Br N_5O,3)were synthesized by the reaction of 2-amino-3-pyrazinecarbohydrazide(C_5H_7N_5O)with halogenated benzaldehyde(C_7H_5OX,X=F,Cl,Br).The structures of the three compounds were characterized by elemental analysis,~1H NMR,IR and X-ray diffraction.X-ray single-crystal diffraction presents that the three compounds all belong to triclinic system,P1 space group.Thermal gravity analyses show that three compounds have excellent thermal stabilities and all the thermal decomposition temperature of maximum weight loss was around 300°C.The interactions of the compounds with CT-DNA were investigated by UV-Vis spectrum,fluorescence spectrum and viscosity measurement.All the results suggest that three compounds could bind with CT-DNA through intercalation.The fluorescence spectrum was also used to study the interactions of three compounds with BSA.It was proved that all the compounds could quench the intrinsic fluorescence of BSA via a static quenching process.Compound 2 displays the strongest binding ability both in the reaction with CT-DNA or BSA.Antimicrobial test was carried on Escherichia coli,Staphylococcus aureus and Salmonella,and 2 is more effective against S.aureus.But in MTT assay,1 shows better cytotoxity activity against A549cells.     

巧用PhotoShop

我们要做PhotoShop的特殊效果字体，总要花一番工夫，特殊效果的字体主要用在海报、广告、宣传资料、网页等方面。做一个好的特殊效果率体，往往需要几个或者几十个步骤，每个步骤，不仅要按步就班地执行，而且不能搞错，很麻烦。而用Phot0Shop提供的类似于批处理功能的ACtlon，就可以轻松实现QAction的下载网址是http：／／www．kewlpack．corn。1．首先，在PhotoShop的WINDOWS菜单下的Show、Action选择LoadAction，在里面选择相应的Aetion文件，再在菜单中选ButtonMode命令。2由于Action文件的不同，使用的方法也会有所不同。对…