细分市场

以往凭借巧克力系列、闪耀（Shine）系列等时尚手机打天下的韩国厂商LG,在今年可谓势头强劲,除了推出代号为“迷”（Secret）的目前市面上最薄500万像素滑盖手机KF755外,还发布了数量不少的其他新品来获得更多的市场份额。其中包括巧克力系列第三代产品LG Chocolate 3．KM380以及我们今天要给大家介绍的KF300。     

试论舰艇综合导航系统的设计原则

本文较为全面地阐述了舰艇综合导航系统的一般设计原则，旨在为我国舰艇综合导航系统的研制提供一定的参考。     

Nucleoside-assisted self-assembly of oligo(p-phenylenevinylene)s at liquid/solid interface: chirality and nanostructures

The formation of DNA nucleoside-assisted π-conjugated nanostructures was studied by means of scanning tunneling microscopy (STM) and force field simulations. Upon adsorption of the achiral oligo(p-phenylenevinylene) (OPV) derivative at the liquid/solid interface, racemic conglomerates with mirror related rosettes are formed. Addition of the DNA nucleosides D- and L-thymidine, which act as "chiral handles", has a major effect on the supramolecular structure and the expression of chirality of the achiral OPV molecules. The influence of these "chiral handles" on the expression of chirality is probed at two levels: monolayer symmetry and monolayer orientation with respect to the substrate. This was further explored by tuning the molar ratio of the building blocks. Molecular modeling simulations give an atomistic insight into the monolayer construction, as well as the energetics governing the assembly. Thymidine is able to direct the chirality and the pattern of OPV molecules on the surface, creating chiral lamellae of π-conjugated dimers.     

Molecular patterning at a liquid/solid interface: the foldamer approach

Molecular patterning has received a lot of attention in the past decade; however, the functionalization of these surface-confined 2D patterns on the nanoscale level remains a challenge. Assembling 2D patterns from oligomeric foldamers turns out to be an interesting approach to accomplishing the controlled positioning of functional elements. We designed a family of peptidomimetic foldamers bearing a 2D turn element folding at the liquid/solid interface. The turning element was developed while studying derivatives with one turning unit. Furthermore, folding was found to be induced by the confinement of the surface. This achievement paves the way for the design of foldamers with multiple turns, providing a higher versatility in the functionalization of nanopatterns.     

红外技术在未来军事技术中的地位和作用

通过对红外技术发展和应用的简要回顾与分析,认为红外技术已经从过去的战术地位发展到今天的战略法位,已经成为国家安全依赖的主要探测技术手段。红外技术将得到全面的、大规模的应用。约外技术已经在现在的、也必须在今后的局部战争中起到了举足轻重的作用,是影响未来军事斗争形势的高新技术。     

J－J方程组的渐近惯性流形*

本文构造了Liapunov泛函,得出了Josephson结中的sine-Gordon方程组的高模态的衰减性质,从而给出了渐近惯性流形。     

Na_5Tm（WO_4）_4发光晶体的光谱特性研究

以Ｎａ２ＷＯ４为助熔剂，采用缓冷法成功地生长出新型发光晶体Ｎａ５Ｔｍ（ＷＯ４）４，晶粒尺寸为２ｍｍ×２ｍｍ×２ｍｍ。根据四方晶系面间距公式及最小二乘法，可以确定晶体的晶胞参数ａ＝１．１３８６ｎｍ，ｃ＝１．１２８３ｎｍ，测定并分析了该晶体室温下的红外光谱、吸收光谱、发射光谱及激发光谱。根据Ｊｕｄｄ－Ｏｆｅｌｔ理论计算了Ｔｍ３＋离子的吸收振子强度和配位场作用强度参数。结果表明该晶体有可能成为一类很重要的蓝色发光材料。     

飞利浦GoGear SA2825 飞声归来

提起飞利浦的飞芯,对于熟悉数码音频播放器领域的朋友们来说,肯定会觉得非常地熟悉,飞芯早已经成为消费者心目中上佳音质的代名词。飞利浦自有品牌的播放器一直在国外有着非常不错的口碑,颇受追捧,不过由于渠道的关系,飞利浦音乐播放器产品在国内市场一直表现平平。随着销售渠道的完善,飞利浦播放器开始大举进军国内市场。在年初的CES2008上,飞利浦一口气推出了多款GoGear系列播放器,SA2825便是其中一款,不过它主打的并不是飞芯,而是飞利浦最新力推的飞声。     

用偏振和有规位相分布抑制线聚焦系统的小尺度不均匀性

研究了一种用以抑制光楔列线聚焦系统在靶面产生的干涉尖端的方法。由这种尖峰引起的小尺度不均匀性对Ｘ射线激光的产生是不利的。利用特殊分布的偏振态和位相，可把尖峰引向更密度伯程度，而且其对比度下降，这将有利于它通过靶物质自身的横向热传导而平滑化。对于四单元的列阵系统，甚至可将尖峰完全消除。     

A Simple and Rapid Method for Synthesis of N,2-Diaryl Diazcnecarboxamides

Itiswellknownthatazocompoundshavebeenwidel}'utilizedasanalyticreagentsanddyes.Theycanalsobeusedinmaterialofnon-linearoptics,materialofopticsinformationstoringinlaserdisk,anddyeswithoilsolubilityinphotochromyinmoderntechnology'.Recently.manynotewoFthystudiesshowthatazobenzenederivativespossessverygoodopticrememberingandphotoelectricproperties.Optical-switchingandimagestoragecanbemadebyazobenzeneliquidcrystaltilm='.Thepreparationofazocompoundshavebeendescribedinmanyliteratures'-'.Inthispaper.L…