新型通用异步收发器芯片MAX3100及其应用

ＭＡＸ３１００是ＭＡＸＩＭ公司生产的全功能通用异步收／发器（ＵＡＲＴ）芯片,与其他ＵＡＲＴ器件相比,它有如下特点：（１）供电范围宽、功耗低,从＋２．７Ｖ至＋５．５Ｖ的电源中仅吸收０．５ｍＡ的电流。具有零功耗的停机模式,并能由接收信号唤醒。（２）不仅适合于速率高达２３０ｋｂｉｔ／ｓ的ＲＳ２３２和ＲＳ４８５数据链路,而且支持速率从２．４ｋｂｉｔ／ｓ至１１５．２ｋｂｉｔ／ｓ的红外数据ＩｒＤＡ格式通信,以提供简单的无线接口。（３）使用ＳＰＩ／Ｍｉｃｒｏｗｉｒｅ同步串行接口与微控制器进行通信。具有Ｆ…     

视听资料索引

视听资料索引３９１索尼ＢｅｔａｃａｍＳＰ１０００ＰＲＯＵＶＷ系列录像机（日），１９９３．１２，Ｐ６０—６６３９２Ｄ－２复合格式磁带录像标准ＳＭＰＴＥ（英），１９９３．１２，Ｐ１１６０—１１６３３９３Ｄ－２复合格式——磁带标准ＳＭＰＴＥ（英），１９９３...     

OPTICAL FIBER-MOBILE COMMUNICATION

ＯＰＴＩＣＡＬＦＩＢＥＲ－ＭＯＢＩＬＥＣＯＭＭＵＮＩＣＡＴＩＯＮ￥ＦＥＮＧＸｉ－Ｙｕ；ＳＵＮＴｉｅ－Ｃｈｅｎｇ（ＤａｌｉａｎＵｎｉｖｅｒｓｉｔｙｏｆＴｅｃｈｎｏｌｏｇｙＤａｌｉａｎ１１６０２３）Ａｂｓｔｒａｃｔ：Ｔｈｅｔｅｃｈｎｉｑｕｅｏｆｍｏｂｉｌ...     

VLSI Structure for an All Digital Receiver for CDMA PABX Handset

ＶＬＳＩＳｔｒｕｃｔｕｒｅｆｏｒａｎＡｌｌＤｉｇｉｔａｌＲｅｃｅｉｖｅｒｆｏｒＣＤＭＡＰＡＢＸＨａｎｄｓｅｔＺｈｏｕＳｈｉｄｏｎｇ；ＢｉＧｕａｎｇｇｕｏ（ＳｏｕｔｈｅａｓｔＵｎｉｖｅｒｓｉｔｙ，Ｎａｎｊｉｎｇ２１００１８）（Ｐｈ．Ｄｓｔｕｄｅｎｔａｔ...     

对应于数字音频传输的USB控制器LSI

美国ＫＣＴｅｃｈｎｏｌｏｇｙ公司开发了对应数字音频传输并具有监视器控制功能的ＵＳＢ控制器ＬＳＩ一ＫＣ８２Ｃ１７８,可用于个人电脑ＣＲＴ监视器,ＬＣＤ监视器等。该ＬＳＩ对应于数字音频规格“ＵＳＢＡｕｄｉｏＣｌａｓｓＳｐｅｃｉｆｉｃａｔｉｏｎｖ１．０”,如果与ＡＣ（ＡｕｄｉＣｏｄｅｃ）”９７标准的遍解码ＬＳＩ相连即可再生个人电脑发送的音频数据。音频数据的形式是取样频率为４８ｋＨｚ、量化数为１６比特或８比特的ＰＣＭ。具有２个对应“ＵＳＢＭｏｎｉｔｏｒＣｏｎｔｒｏｌＣｌａｓｓＳｐｅｃｉｆｉｃａｔｉｏｎｖ…     

Performance Study of DS—SFH ／SSMA Communication with Multipath Diversity

ＰｅｒｆｏｒｍａｎｃｅＳｔｕｄｙｏｆＤＳ－ＳＦＨ／ＳＳＭＡＣｏｍｍｕｎｉｃａｔｉｏｎｗｉｔｈＭｕｌｔｉｐａｔｈＤｉｖｅｒｓｉｔｙＴａｎＺｈｅｎｈｕｉ；ＧｕａｎＨａｏ（ＮｏｒｔｈｅｒｎＪｉａｏｔｏｎｇＵｎｉｖｅｒｓｉｔｙ，Ｂｅｉｊｉｎｇ１０００４４）Ａ...     

电子缩略新语卡(8)

Ｂ－ＩＳＤＮ　Ｂｒｏａｄｂａｎｄ　ＩＳＤＮ　宽带综合业务数字网Ｂ－ＭＡＣ　Ｂｒｏａｄｃａｓｔｉｎｇ　Ｍｕｌｔｉｐｌｅｘｅｄ　ａｎａｌｏｇ　Ｃｏｍｐｏｎｅｎｔ　（卫星图像传输方法）广播复用模拟部件Ｂ－ＳＲＡＭ　Ｂｕｒｓｔ　ＳＲＡＭ　突发方式同步型高速ＳＲＡＭＢＡＣＰ　ＢＡｎｄ　Ａｌｌｏｃａｔｉｏｎ　Ｃｏｎｔｒｏｌ　Ｐｒｏｔｏｃｏｌ（传输速度自动调节）频带配置控制协议ＢＡＴ　Ｂｅｓｔ　Ａｖａｉｌａｂｅ　Ｔｅｃｈｎｏｌｏｇｙ最佳可利用技术ＢＢ　Ｂａｓｅ　Ｂａｎｄ基带ＢＢ　Ｂｏｏｋ　ｔｏ　Ｂｉｌｌ　ｒ…     

Storage capacity of complex Hopfield model

ＳｔｏｒａｇｅｃａｐａｃｉｔｙｏｆｃｏｍｐｌｅｘＨｏｐｆｉｅｌｄｍｏｄｅｌＳＨＵＡＩＪＷ；ＣＨＥＷＺＸ；ＬＩＵＲＴ；ＷＵＢＸ（Ｄｅｐｔ．ｏｆＰｈｙｓｉｃｓ，ＸｉａｍｅｎＵｎｉｖｅｒｓｉｔｙ，Ｘｉａｍｅｎ３６１００５，ＣＨＮ）Ａｂｓｔｒａｃｔ：ＴｈｅＤ...     

Novel DS／SSMA Systems with Trellis—Coded Sequence and Phase Modulation

ＮｏｖｅｌＤＳ／ＳＳＭＡＳｙｓｔｅｍｓｗｉｔｈＴｒｅｌｌｉｓ－ＣｏｄｅｄＳｅｑｕｅｎｃｅａｎｄＰｈａｓｅＭｏｄｕｌａｔｉｏｎＺｈａｎｇＱｉｎｇ；ＢｉＧｕａｎｇｇｕｏ（ＳｏｕｔｈｅａｓｔＵｎｉｖｅｒｓｉｔｙ，Ｎａｎｊｉｎｇ２１００１８）Ａｂｓｔｒａｃｔ...     

与Modem相关的速率名词

一般地,与Ｍｏｄｅｍ（调制解调器）有关的速率包括：Ｍｏｄｅｍ之间的传输速率（ＤＣＥＳＰＥＥＤ）;数据终端设备与Ｍｏｄｅｍ之间的传输速率（ＤＴＥＳＰＥＥＤ）;Ｍｏｄｅｍ本身的串口速率（ＳＥＲＩＡＬＰＯＲＴＳＰＥＥＤ）．这里的ＤＣＥ指数据电路终接设备,通...     

The Contribution of DOPA to Substrate-Peptide Adhesion and Internal Cohesion of Mussel-Inspired Synthetic Peptide Films

Mussels use a variety of 3, 4-dihydroxyphenyl-l-alanine (DOPA) rich proteins specifically tailored to adhering to wet surfaces. Synthetic polypeptide analogues of adhesive mussel foot proteins (specifically mfp-3) are used to study the role of DOPA in adhesion. The mussel-inspired peptide is a random copolymer of DOPA and N(5) -(2-hydroxyethyl)-l-glutamine synthesized with DOPA concentrations of 0-27 mol% and molecular weights of 5.9-7.1 kDa. Thin films (3-5 nm thick) of the mussel-inspired peptide are used in the surface forces apparatus (SFA) to measure the force-distance profiles and adhesion and cohesion energies of the films in an acetate buffer. The adhesion energies of the mussel-inspired peptide films to mica and TiO(2) surfaces increase with DOPA concentration. The adhesion energy to mica is 0.09 μJ m(-2) mol(DOPA) (-1) and does not depend on contact time or load. The adhesion energy to TiO(2) is 0.29 μJ m(-2) mol(DOPA) (-1) for short contact times and increases to 0.51 μJ m(-2) mol(DOPA) (-1) for contact times >60 min in a way suggestive of a phase transition within the film. Oxidation of DOPA to the quinone form, either by addition of periodate or by increasing the pH, increases the thickness and reduces the cohesion of the films. Adding thiol containing polymers between the oxidized films recovers some of the cohesion strength. Comparison of the mussel-inspired peptide films to previous studies on mfp-3 thin films show that the strong adhesion and cohesion in mfp-3 films can be attributed to DOPA groups favorably oriented within or at the interface of these films.     

Improving FH and FH/PN spread spectrum communications through PN M-ary phase sequences and signal editing

Pseudo-noise (PN) or direct sequence (DS) modulation, frequency hopping (FH) and their combination (i.e. the hybrid FH/PN approach) are common spread spectrum (SS) communications techniques used to achieve anti-jamming (AJ) and/or low probability of intercept (LPI). This study investigates the following FH and FH/PN related issues: (i) derive and apply M-ary phases of PN sequences to increase the AJ and transmission efficiency, (ii) use of erasure channel to reduce received errors and unreliable data, (iii) employ error correction coding and signal editing (SE) to improve communication surviv-ability, and (iv) adopt surface acoustic wave (SAW) devices to simplify the synchronization procedure in PN correlation. A special example is also given to illustrate the potential AJ improvement when an SS communications system employs both concatenated coding and concatenated SE techniques.     

面向对注氢硅片中微结构的影响

把不同面向的注氢硅片制成横截面样品,在高分辨率透射电子显微镜下进行观察,发现衬底面向对其中的微结构有明显的影响.首先表现为衬底中主要出现平行于正表面的氢致片状缺陷,即(10 0 )衬底中,主要出现平行于正表面的{ 10 0 }片状缺陷,而(111)衬底中出现的主要是平行于正表面的{ 111}片状缺陷.其原因是注入引起垂直正表面的张应变.另外,面向的影响还表现为,(10 0 )衬底中出现的{ 113}缺陷在(111)衬底中不出现.在(111)衬底中出现的晶格紊乱团和空洞在(10 0 )衬底中不出现.从而推测,{ 111}片状缺陷的形成不发射自间隙原子,而(10 0 )片状缺陷的形成将发射自     

Direct growth of CdTe on (100), (211), and (111) Si by metalorganic chemical vapor deposition

CdTe epilayers were grown directly on (100), (211), and (111) silicon substrates by metalorganic chemical vapor deposition (MOCVD). The crystallinity and the growth orientation of the CdTe film were dependent on the surface treatment of the Si substrate. The surface treatment consisted of exposure of the Si surface to diethyltelluride (DETe) at temperatures over 600°C prior to CdTe growth. Direct growth of CdTe on (100) Si produced polycrystalline films whereas (lll)B single crystals grew when Si was exposed to DETe prior to CdTe growth. On (211) Si, single crystal films with (133)A orientation was obtained when grown directly; but produced films with (211)A orientation when the Si surface was exposed to DETe. On the other hand, only (lll)A CdTe films were possible on (111) Si, both with and without Te source exposure, although twinning was increased after exposure. The results indicate that the exposure to a Te-source changes the initial growth stage significantly, except for the growth on (111) Si. We propose a model in which a Te atom replaces a Si atom that is bound to two Si atoms.     

In-orbit demonstration of optical IOL/ISL—the silex project

The use of optical communications for the high-data-rate links of the future European Data Relay System (EDRS) is receiving much attention. To confirm the feasibility of such communications links, an experimental system (SILEX) consisting of three satellites (two in geostationary orbit and one in low earth orbit) is planned for 1992 or 1993 to demonstrate both inter-orbit link (IOL) and intersatellite link (ISL) capabilities. A detailed feasibility study was performed from January to July 1987 under a European Space Agency (ESA) contract with Matra (France) as prime contractor, ANT (West Germany), Telespazio and Selenia Spazio (Italy) as subcontractors, and contributions from Berlin (France) and Dornier (West Germany). The system is based on GaAlAs semiconductor technology (0.8 μm) with silicon avalanche photodiodes (APDs) as detectors and arrays of charge-coupled devices (CCDs) for both acquisition and tracking sensors. The design will allow wavelength division multiplexing (WDM) and high-data-rate transmission to be demonstrated. The expected data rates are 120 Mb/s duplex for ISL, 1 Mb/s on the IOL forward link (GEO→LEO) and two to four simultaneous 60 or 120 Mb/s channels on the IOL return link (LEO→GEO).     

Minimizing metastabilities in Cu(In,Ga)Se2/(CBD)Zn(S,O,OH)/i‐ZnO‐based solar cells

Chemical bath deposited (CBD)Zn(S,O,OH) is among the alternatives to (CBD)CdS buffer layers in Cu(In,Ga)Se₂(CIGSe)‐based devices. Nevertheless, the performances reached by devices buffered with (CBD)Zn(S,O,OH) vary strongly from one sample to another and from one laboratory to another, indicating that parameters of minority impact with (CBD)CdS‐buffered devices have major influence when buffered with (CBD)Zn(S,O,OH). Moreover, the literature reports, but not systematically, the requirement of substituting the standard resistive intrinsic ZnO by (Zn,Mg)O and/or soaking the devices in ultraviolet‐containing light in order to reach optimal device operation. The present study investigates the impact of the three following parameters on the optoelectronic behavior of the Cu(In,Ga)Se₂/(CBD)Zn(S,O,OH)/i‐ZnO‐based solar cells: (i) CIGSe surface composition; (ii) (CBD)Zn(S,O,OH) layer thickness; and (iii) i‐ZnO layer resistivity. The first conclusion of this study is that all of these parameters are observed to influence the electrical metastabilities of the devices. The second conclusion is that the light soaking time needed to achieve optimal photovoltaic parameters is decreased by (i) using absorbers with Cu content close to stoichiometry, (ii) increasing the buffer layer thickness, and (iii) increasing the resistivity of i‐ZnO. By optimizing these trends, stable and highly efficient Zn(S,O,OH)‐buffered CIGSe solar cells have been fabricated. Copyright © 2014 John Wiley & Sons, Ltd.     

有机近场存储材料的合成及其应用

研究近场存储材料二芳基乙烯类化合物1，2-双(2-甲基-5-(4-(2-(1，3-二氧戊环基))苯基)噻吩-3-基)全氟环戊烯(1a)和1，2-双(2-甲基-5-(4-醛基苯基)噻吩-3-基)全氟环戊烯(1a′)的合成、表征。将这两种二芳基乙烯类化合物分别与聚甲基丙烯酸甲酯(PMMA)掺杂，并采用旋转涂膜的方法制备膜片，采用固体浸没透镜(SIL)进行近场存储，在有机小分子上存储并记录了小于1μm的斑点。     

Noise sources in miniature fluxgate sensors Part I: theoretical treatment

A mathematical model for miniature fluxgate magnetometers is presented in the first part of this work. It is based on certain well-defined and easy-measurable parameters of the hysteresis loop exhibited by the fluxgate magnetic core, i.e., the coercive force and the field intensities at which the flux-reversal starts and saturates. Two signal extraction techniques are modeled, the classical second-order harmonic one, and the current sampling one. For both cases, analytical expressions (in time and frequency domains) are derived for the magnetometer transfer function (voltage vs field) and the influence of the aforementioned hysteresis loop parameters on the magnetometer response. Consequently the signal-to-noise ratio (SNR) in the ELF (Extremely Low Frequency) range and the effective magnetometer bandwidth are calculated for both cases. The SNR is a function of the variance of the aforementioned hysteresis loop parameters. Several noise-sources of different origin have been found to influence this variance, namely: (a) the magnetic (Barkhausen) noise, (b) the noise superimposed to the excitation waveform, (c) the noise generated due to electromagnetic-interference, and (d) the noise generated due to mechanical vibration of fluxgate cores. The extend, up to which the power of these noise-sources boost the variance of the aforementioned hysteresis loop parameters, is a function of certain fluxgate core characteristics, namely: (a) the saturation magnetization, (b) the coercive field, (c) the flux-reversal duration, (d) the dependence of flux-reversal duration on the excitation field slope (slew rate), (e) the core cross-section, and (f) the core frequency response (magnetic damping and magnetic viscosity). Finally, the conditions are investigated so that the current-sampling technique exhibits better SNR compared to the classical second-order-harmonic one. In the second part of this work the theory presented here is applied to explain the noise performance of miniature fluxgates employing amorphous wire cores.     

Fabrication of Alq3／PBD OMQW Structures and Its Photoluminescence Characteristics

Organic multiple quantum well(OMQW)structures consisting of alternating layers of tris(8-quinolinolato)aluminum(Ⅲ）（Alq3)an 2-(4-biphenylyl)-5-(4-ter-butylphenyl)-(1,3,3-oxadiazole)(PBD)have been fabricated by organic molecular beam deposition(OMBD).The individual layer thickness in the multilayer samples was varied from 6 nm tp 20nm.The multiple quantum well structures were determined by low angle X-ray diffraction,optical absorption and photoluminescence(PL).The PL spectra narrow and the emission energy has been observed to shift to higher energy compared with that in the monolayer structure,suggesting a quantum size effect.     

Immune Complexes Mimicking Synthetic Vaccine Nanoparticles for Enhanced Migration and Cross‐Presentation of Dendritic Cells

The well‐designed activation of dendritic cells (DCs) by enhancing the delivery of antigens and immunostimulatory adjuvants into DCs is a key strategy for efficient cancer immunotherapy. Antigen‐antibody immune complexes (ICs) are known to directly bind to and cross‐link Fc‐gamma receptors (FcγRs) on DCs, which induce enhanced migration of DCs to draining lymph nodes through the up‐regulation of the chemokine receptor CCR7 and cross‐presentation inducing cytotoxic T lymphocyte (CTL) response against tumor antigen. In this study, ICs mimicking synthetic vaccine nanoparticles (NPs) are designed and synthesized by the coating of poly (lactic‐co‐glycolic acid) (PLGA) NPs containing adjuvant (CpG oligodeoxynuleotides (ODNs) as toll‐like receptor 9 ligands) with ovalbumin (OVA) proteins (as model antigens) and by the formation of OVA–OVA antibody ICs. Through the combination of FcγRs‐mediated efficient antigen uptake and CpG ODNs‐based immunostimulation, the secretion of TNF‐α (12.3‐fold), IL‐6 (7.29‐fold), and IL‐12 (11‐fold), homing ability to lymph nodes (7.5‐fold), and cross‐presentation (83.8‐fold IL‐2 secretion) are dramatically increased in DCs treated with PLGA(IC/CpG) NPs. Furthermore, mice vaccinated with DCs treated with PLGA(IC/CpG) NPs induced significant tumor (EG7‐OVA) growth inhibition as well as prolonged survival through CTL‐mediated enhanced cytotoxicity, antigen‐specific responses, and IFN‐γ secretion.