高分辨高灵敏度 CCD图像传感器驱动时序设计许涛1,张振海1, *,石志国2,张东红3,侯帅1,张亮1,王健1,

在分析面阵CCD图像传感器结构和驱动时序基础上,针对高分辨率高灵敏度ICX694ALG大面阵CCD图像传感器 ,研究其驱动时序发生器。以现场可编程门阵列 ( FPGA) 作为硬件平台 ,通过Verilog HDL硬件描述语言对该驱动时序发生器进行了硬件描述,采用ISE软件进行功能仿真,并针对XILINX公司的可编程逻辑器件XC3S1000进行了硬件适配。仿真测试表明,FPGA驱动时序发生器能够满足高分辨高灵敏ICX694ALG大面阵CCD图像传感器驱动要求,达到了设计要求。     

Quantized (1, 0) ⊕ (0, 1) Fields

We find a mapping between antisymmetric tensormatter fields and the Weinberg 2(2j + 1)-componentbispinor fields. Equations which describethe j = 1 antisymmetric tensor field coincide with the Hammer-Tucker equations entirely and withthe Weinberg ones within a subsidiary condition, theKlein-Gordon equation. A new Lagrangian for the Weinbergtheory is proposed which is scalar and Hermitian. It is built on the basis of the concept ofWeinberg doubles. The origin of acontradiction between the classical theory, the Weinbergtheorem B – A = for quantum relativisticfields, and the claimed longitudity of the antisymmetrictensor field [transformed on the (1, 0) (0, 1)Lorentz group representation] after quantization isclarified. Analogs of the j = 1/2 Feynman–Dysonpropagator are presented in the framework of the j = 1 Weinberg theory.It is then shown that under a definite choice of fieldfunctions and initial and boundary conditions themassless j = 1 Weinberg–Tucker–Hammerequations contain all the information that the Maxwell equationsfor the electromagnetic field have. Thus, the formerappear to be of use in describing some physicalprocesses.     

Inflation, Extra Dimensions, and ΩΛ ≈ 1

An (N + 1)-dimensional quantum mechanical model for the origin of the universeresults in a 58e-fold inflation and a cosmological constant/vacuum energy densitywith 1.     

Electronic structure,mechanical and optical properties of ternary semiconductors Si1-xGexC (X = 0, 0.25, 0.50, 0.75, 1)

The electronic structure of silicon carbide with increasing germanium content have been examined using first principles calculations based on density functional theory. The structural stability is analysed between two different phases, namely, cubic zinc blende and hexagonal phases. The zinc blende structure is found to be the stable one for all the Si_1-xGe_xC semiconducting carbides at normal pressure. Effect of substitution of Ge for Si in SiC on electronic and mechanical properties is studied. It is observed that cubic SiC is a semiconductor with the band gap value 1.243?eV. The band gap value of SiC is increased due to the substitution of Ge and the band gap values of Si _0.75 Ge _0.25 C, Si _0.50 Ge _0.50 C, Si _0.25 Ge _0.75 C and GeC are 1.322 eV, 1.413 eV, 1.574 eV and 1.657?eV respectively. As the pressure is increased, it is found that the energy gap gets decreased for Si_1-x Ge_xC (X?=?0, 0.25, 0.50, 0.75, 1). The elastic constants satisfy the Born – Huang elastic stability criteria. The bulk modulus, shear modulus, Young’s modulus and Poisson’s ratio are also calculated and compared with the other available results.     

SAC-CI方法研究甲基乙烯基硅酮分子激发态1 1A’’, 1 1A’, 2 1A’’结构与性质

采用对称性匹配簇/组态相互作用(symmetry adapted cluster－configuration interaction, SAC－CI)方法, 在6-311++g**基组水平上优化了甲基乙烯基硅酮分子的前三个单激发态1 1A’’, 1 1A’, 2 1A’’的平衡几何结构, 比较三个激发态的电荷分布, 最高占据轨道, 最低空轨道, 能隙等结构特性. 研究发现, 1 1A’ 态能隙差最小, 电子容易发生跃迁. 计算了三个单重激发态相应的振动光谱, 得出其振动模式. 从甲基乙烯基硅酮分子激发态结构特性, 电荷分布, 极强位置振动模式等方面分析了其断键机制.     

AUTHOR INDEX TO VOLUME 1, 2003

An,Yuying see Huang,Wei,475Andreev,Yuri see Huang,ainzhe,237Bai.Bing see Li,Jun,503Bai,Ylunxia see Zuo.Yuhua。529Bi,Yong一;Feng,Yan;Gong,Huarong;Zhang,Hongbo;and Xu,Zuyau:High—average power THG of a diode—pumpedNd:YAG laser at 355 nm generated bvLiBa05 crystal,91Cai,Bingehu see Wu,Maosong,139Cai,Haiwen一;Geng,Jianxin;Dong,Zuoren;Chen,Gaoting;and Fang,Zujie:Wideband digitally tunable lasers based onfiber Bragg grating external cavity arrayand 1×N optical switch,12Cai,Haiw…     

SUBJECT INDEX TO VOLUME 1, 2003

AbsorDtion Bragg suppression for optical absorptionin multi一(】uantum well structures.299 Cavity enhanced absorption spec—troscopy for N20 detection at 2.86Ⅲnusing a continuous tunable color center1aser.361Acousto—optical materials A high—speed automatic spectrome—ter})ased on a solid—state non—collinearacousto—optic tunable filter,85Air pollution monitoring A new differential absorption lidar forN02 nleasure~lents using Raman—shiftedtechnique,435Algebraic optical processing A rl…     

High-precision calculationsj of the 3,1 P 1 0 →1 S 0 E1 amplitudes for magnesium, calcium, and strontium

High-precision calculations of the ^3,1 P ₁ ⁰ (ns np→¹ S ₀(ns ²) E1 amplitudes were carried out for magnesium, calcium, and strontium (n=3, 4, and 5, respectively). The following results were obtained for the reduced matrix element 〈¹ P ₁ ⁰ ‖d‖ ¹ S ₀〉 of electric dipole moment operator: 4.03(2) au for Mg, 4.91(7) au for Ca, and 5.28(9) au for Sr. These matrix elements are necessary for calculating the van der Waals coefficients C ₆, which are used in evaluating the atomic scattering lengths. The latter determine the dynamics and stability of the Bose-Einstein condensate.     

激发态H2(X1∑+g,v=1,J=1)之间的碰撞能量合并

受激拉曼激发H2(0,1)基态的Q支得到H2(1,1)能级.在室温条件下,利用反斯托克斯拉曼散射(CARS)探测技术测量了碰撞能量合并(EP)过程H2(1,1)+H2(1,1)→H2(2,J)+H2(0,J″)及H2(1,1)与H2(1,J)转动能级间的碰撞转移速率系数.扫描CARS谱表明在H2(1,1)能级的碰撞能量...     

ICP—AES法直接测定锡锭中的As,A1,Bi,Cd,Cu,Fe,Pb,Se,Sb,Zn

以电荷耦合器件为检测器的全谱直读等离子体光谱仪直接测定锡锭中Ａｓ、Ａ１、Ｂｉ、Ｃｄ、Ｃｕ、Ｆｅｄ、Ｐｂ、Ｓｅ、Ｓｂ、Ｚｎ十种杂质元素的含量。该方法简便、快速且具有比化学法更低的检出限,加标回收试验结果不明,回收率为９２％－１０５％,ＲＳＤ均小于１．５％。     

Raman E 1, E 1+Δ1 resonance in unstrained germanium quantum dots

Raman scattering by optical phonons in unstrained Ge quantum dots obtained in GaAs/ZnSe/Ge/ZnSe structures was studied using molecular beam epitaxy. A shift in the E ₁, E ₁+Δ1 resonance energy due to the quantization of the spectrum of electron and hole states in quantum dots was observed. The properties observed were explained with the use of a simplest model of localization with allowance for the spectrum of Ge electron states.     

Transition probabilities of the X1Σ+, A1Π, B1Δ, C1Σ+, and D1Π states of the AlO+ cation

ABSTRACT

This study computes the potential energy curves of the X¹Σ⁺, A¹Π, B¹Δ, C¹Σ⁺, and D¹Π states of AlO⁺ cation and the transition dipole moments between them. The orders of the rotationless radiative lifetimes are 10–100?μs for the A¹Π state, 1–1000?ms for the B¹Δ state, 10?ns for the first well and 100?ns for the second well of the C¹Σ⁺ state, and 1?μs for the D¹Π state. Emissions of the B¹Δ–A¹Π and D¹Π–C¹Σ⁺ systems are so weak that they are hardly measured via spectroscopy, the emissions of the C¹Σ⁺–X¹Σ⁺, C¹Σ⁺–A¹Π, and D¹Π–X¹Σ⁺ systems are so strong that they can be detected readily, and emissions of the A¹Π–X¹Σ⁺ and D¹Π–A¹Π systems can be observed through spectroscopy only by a significant effort. There is a strong great similarity between spontaneous emissions of the A¹Π–X¹Σ⁺ system of the AlO⁺ cation and the A²Π–X²Σ⁺ system of the AlO radical. The emissions of the A²Π–X²Σ⁺ system of the AlO radical have been measured in outer space Therefore, it is highly possible that the emissions of the A¹Π–X¹Σ⁺ system of the AlO⁺ cation can be detected in the astrophysical media.     

TOTAL CONTENTS,Vol.30,No.1─12,2001

ＳｕｂｊｅｃｔＷｒｉｔｅｒＮｏ ｐ ＳｐｅｃｉａｌＩｓｓｕｅｉｎＣｏｍｍｅｍｏｒａｔｉｏｎｏｆｔｈｅ 1 0 0ｔｈＡｎｎｉｖｅｒｓａｒｙｏｆｔｈｅＢｉｒｔｈｏｆＱｕａｎｔｕｍＭｅｃｈａｎｉｃｓＲｅｔｒｏｓｐｅｃｔａｎｄＨｉｎｄｓｉｇｈｔＨｉｓｔｏｒｙａｎｄＦｕｔｕｒｅ———ＩｎＣｏｍｍｅｍｏｒａｔｉｏｎｏｆＱｕａｎｔｕｍＴｈｅｏｒｙ′ｓＣｅｎｔｅｎａｒｙ ＺＨＯＵＧｕａｎｇ Ｚｈａｏ……………………… 5 ( 2 5 9)ＴｈｅＢｉｒｔｈａｎｄＧｒｏｗｔｈｏｆＱｕａｎｔｕｍＴｈｅｏｒｙ———ＦｒｏｍＱｕａｎｔｕｍ…     

On the Lieb-Thirring constantsL γ,1 for γ≧1/2

LetE _i(H) denote the negative eigenvalues of the one-dimensional Schrödinger operatorHu??u″?Vu,V≧0, onL ₂(∝). We prove the inequality (1) $$\mathop \sum \limits_i |E_i (H)|^{ \gamma } \leqq L_{\gamma ,1} \mathop \smallint \limits_\mathbb{R} V^{\gamma + 1/2} (x)dx,$$ for the “limit” case γ=1/2. This will imply improved estimates for the best constantsL _γ,1 in (1) as 1/2<γ<3/2.     

Line intensities in the ν1 + 2ν2, 2ν2 + ν3, 2ν1, ν1 + ν3, 2ν3, and ν1 + ν2 + ν3 − ν2 bands of H216O,between 6300 and 7900 cm−1

Using Fourier transform spectra, the intensities of 428 weak lines belonging to the ν₁ + 2ν₂, 2ν₂ + ν₃, 2ν₁, ν₁ + ν₃, 2ν₃, and ν₁ + ν₂ + ν₃ − ν₂ bands of the H₂¹⁶O molecule have been measured, between 6300 and 7900 cm⁻¹, with an average uncertainty of 7%.     

A note on the interpretation ofE 1,E 1+Δ 1 transitions in Ge

The paper deals with problems of the interpretation ofE ₁,E ₁+₁ transitions near 2 eV in Ge. The treatment of ac piezoreflectance spectra of Ge in this energy region shows that the transitionse ₁,E ₁+₁ are, in general, not well-described by any model of the pair of parabolic critical points of the same type; therefore neither of both frequently used models (3DM₁-pair or 2DM₀- pair) is appropriate. The hydrostatic componentW ₁(E) of the piezooptic tensor was extracted from the experimental ac piezoreflectance spectra and then treated by the symmetrization method for the precise determination of transition energies. This method does not depend on the type of the critical points pair and it is based on the existence of a symmetric linear combination of real and imaginary parts of the critical point contribution to the dielectric function.     

1KHz,30KV磁脉冲调制器

本文介绍一台小型磁脉冲调制器的实验。实验已得到30kV以上,上升时间15ns,半高宽50ns的较好输出波形。该系统以猝发脉冲方式工作。脉冲串重复率为1Hz,脉冲重复率大于1kHz,串内脉冲数为10。实验的初步成功标志着建造高功率磁脉冲调制器完全可能。