Director Field in a Bipolar Configured Nematic Droplet

Polymer dispersed liquid crystal(PDLC) have found its application in flexible displays and switchable windows. Such applications require dimension of the droplets to be several micro meters[1]. Recently, it is found that droplets in PDLC may gather together in some districts by special manufacture process, to form switchable period holographic gratings. Such an application requires dimension of the droplets less than 200 nm[2]. In spite of dimension of the droplets, whether in micrometers …     

Measurement of a Three－dimensional Gas Temperature Field with Holographic Interferometry

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Field Emission From Diamond and Silicon Carbide coated Silicon Field Emitters

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EditShare Field便携式共享存储系统

Editshare Field是为移动编辑而设计的。它设计的理念是允许编辑人员针对一些特定节目采集的内容如:运动会,特别的综艺娱乐活动和需要高质量的制作在Editshare Field里能进行协作编辑。     

An Analysis of Near Field and Application of a New Comb-shaped Antenna for Radio Frequency Identification

1　ＩｎｔｒｏｄｕｃｔｉｏｎＲａｄｉｏＦｒｅｑｕｅｎｃｙＩｄｅｎｔｉｆｉｃａｔｉｏｎ (ＲＦＩＤ )ｈａｓｂｅｅｎｄｅｖｅｌｏｐｅｄｒａｐｉｄｌｙｓｉｎｃｅ 1 990ｓ.Ｉｔｉｓ,ｉｎｆａｃｔ,ｃｏｍｐａｒｅｄｔｏｍａｇｎｅｔｉｃｃａｒｄｏｒＩＣｃａｒｄｃａｌｌｅｄａｎｅｗｇｅｎｅｒａｔｉｏｎｏｆｒｅｃｏｇｎｉｔｉｏｎｔｅｃｈｎｉｑｕｅｆｏｒｉｔｓｃｏｎｔａｃｔｌｅｓｓｏｐｅｒａｔｉｏｎｔｏｒｅａｌｉｚｅｔｈｅｄｕａｌｃｏｍｍｕｎｉｃａｔｉｏｎｓ[1 ] .ＴｈｅＲＦＩＤｓｙｓｔｅｍｃｏｎｓｉｓｔｓｏｆｔｗｏｐａ…     

飞兆半导体Field Stop Trench IGBT

飞兆半导体公司日前推出全新1200V Field Stop Trench IGBT系列器件FGA20N120FTD和FGAl5N120FTD，为电磁感应加热应用的系统设计人员提供了高效的解决方案。这些IGBT同时采用FieldStop（场截止）结构和抗雪崩的Trenchgate（沟道栅）技术，可在传导损耗和开关损耗之间提供最佳权衡，从而获得最高的效率。     

Field Emission Properties of Nitrogen-doped Amorphous Carbon Films

Nitrogen-doped amorphous carbon thin films are deposited on the ceramic substrates coated with Ti film by using direct current magnetron sputtering technique at N2 and Ar gas mixture atmosphere during deposition. The field emission properties of the deposited films have been investigated. The threshold field as low as 5.93V/μm is obtained and the maximum current density increases from 4μA/cm2 to 20.67μA/cm2 at 10.67V/μm comparing with undoped amorphous film. The results show that nitrogen doping plays an important role in field emission of amorphous carbon thin films.     

Electron Field Emission from Patterned Porous Silicon Film

Patterned porous silicon （PS） films were synthesised by using bydrogen ion implantation technique and typical electrochemical anodic etching method.The surface morphology and characteristics of the PS films were characterized by scanning electron microscopy （SEM）,X-ray diffraction（XRD）,and atomic force microscopy （AFM）.The efficient electron field emission with low turn-on field of about 3.5V/μm was obtained at current density of 0.1μA/cm^2.The electron field emission current density from the patterned PS films reached 1mA/cm^2 under and applied field of about 12.5V/μm.The experimental results show that the patterned PS films are of certain practical significance and are valuable for flat panel displays.     

HGCUDF： Hierarchical Grid Clustering Using Data Field

A new clustering algorithm of Hierarchi- cal grid clustering using data field （HGCUDF） is pro- posed. Under the distributed characteristics of data points on objects, the hierarchical grids divide and conquer the large datasets in their hierarchical subsets, which reduces the scope in search of the clustering centers, and mini- ties the area of data space for generating data field. The compared experiments show that HGCUDF computes the grids rather than retrieves all data from database, for im- proving the efficiency.     

On Calculation of the Amplitude–Phase Distribution of the Field Radiated from an Open End of a Rectangular Dielectric Waveguide

The problem of calculating the amplitude–phase distribution of the field radiated from an open end of a rectangular dielectric waveguide expanding along one of its sides (a plane dielectric horn) is considered. The problem of diffraction on the junction of a feed dielectric waveguide and the horn is solved by the domain decomposition method using a model in the form of a screened dielectric waveguide. The amplitude–phase distributions over the distance from the end of the radiator are studied. The possibility of using the screened model for solving the problem of radiation from the open end of a dielectric horn is shown.     

The Frenkel–Poole Effect in the Ionization of an Acceptor Impurity of Boron in Diamond in a Strong Electric Field

Journal of Communications Technology and Electronics - The conductivity of epitaxial diamond films lightly doped with boron has been studied at strong electric fields up to ~5 × 105 V/ cm. It...     

Nonlinear Optical Response of Conjugated Polymer to Electric Field

The organic π-conjugated polymers are of major interest materials for the use in electro-optical and nonlinear optical devices. In this work, for a selected polyacetylene chain, the optical absorption spectra in UV/Vis regime as well as the linear polarizabilitiy and nonlinear hyperpolarizability are calculated by using quantum chemical ab initio and semiempirical methods. The relationship of its optical property to electric field is obtained. Some physical mechanism of electric field effect on molecular optical property is discussed by means of electron distribution and intramolecular charge transfer.     

ZTE Establishes Strategic Partnership with Microsoft in Telecom Field

On September 25 2003, ZTE Corporation, thelargest listed telecom equipment manufacturer inChina, and Microsoft(China)Co. Ltd., the globalleading software supplier, signed a memo forstrategie cooperation in Beijing.The cooperation focuses on setting up a ZTE-Microsoft Software Teehnology Lab at ZTE. It willmake use of advanced technologies and products ofMicrosoft in the software platform field and ZTE'sample communication product lines to conduct co-operation in multiple communication product     

Theoretical Study on Field Emission Patterns of the Nanotube

The distributions of the electrical potential and field have been given from Maxwell‘s field equations. The results show that there exists very strong electric field intensity on the tip of the nanotube,and the intensity decays rapidly as the distance increases away from the tip. The strong electric field intensity on the tip is consistent with the low threshold voltage under the electric field emission from a nanotube. The calculation also revealed that the higher the aspect ratio is, the stronger the electric field intensity on the tip of the nanotube will be,if the distance and voltage between the cathode and the anode do not change, which predicts the lower threshold voltage under the field emission.     

Top Contact Pentacene Organic Thin Film Field Effect Transistors

Using pentacene as an active material, the organic thin film transistors were fabricated on Si_(3)N_(4)/p-Si substrates by using RF-magnetron sputtered amorphous aluminium as the gate electrode contact, and using highly doped Si as the gate electrode and substrate with plasma-enhanced chemical vapor deposited (PECVD) silicon nitride as gate dielectric. Pentacene thin films were deposited by thermal evaporation on dielectrics as the active layer, then RF-magnetron sputtered amorphous aluminium was used as the source and drain contacts. Measurement results show that field effect mobility and threshold voltage are 0.043 cm~2/(V·s) and 12.6 V, respectively, and on-off current ratio is nearly 1×10~(3).     

Software Implementation of Elliptic Curve Encryption over Binary Field

The mathematical theory for elliptic curve encryption based on optimal normal basis(ONB) over F_2~m is introduced.Then an elliptic curve cryptography(ECC) based encryption scheme isanalyzed and designed.The mechanism for key exchange based on Diffie-Hellman is described in detailsfor further applications.Based on these theoretic foundations,the software based on ECC is developedand an application is provided.The software is characterized by excellent security as well as highefficiency.     

Electron Acceleration in the Cone-shaped Extra-intense Stationary Laser Field

A technique of electron acceleration in the cone-shaped stationary laser field is proposed. An electron acceleration in this laser is studied, which shows that there is no electron bunching but there exists electron capture in this laser field.     

飞兆Field Stop Trench IGBT实现高能效设计

当前,能源问题日益严峻,预计从2004年至2030年全世界总能耗将增长57%,发展中国家的不可再生能源消耗速度加快,与此同时,美国和中国则成为全球最大的能源消耗国。应对能源紧缺已成为国家、企业必须共同面对的问题,对于半导体厂商而言,无疑研发高能效解决方案正顺应了这一市场趋势与需求。经实践证明,在家电燃气中使用感应加热技术可有效地     

Field Electron Emission from Diamond—like Carbon Films

A low turn-on field electron emission from diamond-like carbon films has been observed for the first time to author‘s knowledge,Carbon films were prepared by micowave plasma chemical vapor deposition(CVD).Special pretreatment ceramic substrates were used.The characteristics of the film have been identified by using X-ray diffraction(XRD),and Raman spectrum.The field emission experiment has been performed in a vacuum chamber with a base pressure of about 10^-5Pa.The turn-on field of 1.2V/μm,and the current density of 1.25 mA/cm^2 at electric field of 6V/μm were obtained.