继续推进节能监察 建设资源节约型城市——2006年度节能监察工作总结

2006年是“十一五”开局之年。为了加快建设资源节约型城市,年内市人大、市政府颁发了《关于进一步加强节约能源工作的决定》,、《关于进一步加强本市节能工作的若干意见》,提出了“十一五”期间本市单位GDP能耗要再降20%的目标。上海市节能监     

Analysis and design of a 1.8-2.7 GHz tunable 8-band TDD LTE receiver front-end

This paper describes the analysis and design of a 0.13μm CMOS tunable receiver front-end that supports 8 TDD LTE bands,covering the 1.8-2.7 GHz frequency band and supporting the 5/10/15/20 MHz bandwidth and QPSK/16QAM/64QAM modulation schemes.The novel zero-IF receiver core consists of a tunable narrowband variable gain low-noise amplifier(LNA),a current commutating passive down-conversion mixer with a 2nd order low pass trans-impedance amplifier,an LO divider,a rough gain step variable gain pre-amplifier,a tunable 4th order Chebyshev channel select active-RC low pass filter with cutoff frequency calibration circuit and a fine gain step variable gain amplifier.The LNA can be tuned by reconfiguring the output parallel LC tank to the responding frequency band,eliminating the fixed center frequency multiple LNA array for a multi-mode receiver. The large various gain range and bandwidth of the analog baseband can also be tuned by digital configuration to satisfy the specification requirement of various bandwidth and modulation schemes.The test chip is implemented in an SMIC 0.13μm 1P8M CMOS process.The full receiver achieves 4.6 dB NF,-14.5 dBm out of band IIP3, 30-94 dB gain range and consumes 54 mA with a 1.2 V power supply.     

Optical and electrical properties of porous silicon layer formed on the textured surface by electrochemical etching

Porous silicon(PS) layers were formed on textured crystalline silicon by electrochemical etching in HF-based electrolyte.Optical and electrical properties of the TMAH textured surfaces with PS formation are studied. Moreover,the influences of the initial structures and the anodizing time on the optical and electrical properties of the surfaces after PS formation are investigated.The results show that the TMAH textured surfaces with PS formation present a dramatic decrease in reflectance.The longer the anodizing time is,the lower the reflectance.Moreover,an initial surface with bigger pyramids achieved lower reflectance in a short wavelength range.A minimum reflectance of 3.86%at 460 nm is achieved for a short anodizing time of 2 min.Furthermore,the reflectance spectrum of the sample,which was etched in 3 vol.%TMAH for 25 min and then anodized for 20 min,is extremely flat and lies between 3.67%and 6.15%in the wavelength range from 400 to 1040 nm.In addition,for a short anodizing time,a slight increase in the effective carrier lifetime is observed.Our results indicate that PS layers formed on a TMAH textured surface for a short anodization treatment can be used as both broadband antireflection coatings and passivation layers for the application in solar cells.     

基于石英球面弯曲晶体的X射线成像研究

为了诊断惯性约束聚变的聚爆靶的尺寸、形状、分布和均匀性等情况,利用X射线布拉格衍射理论,搭建了基于球面弯曲晶体的X射线背光成像系统。其核心元件是α-石英球面弯晶,α-石英晶体性质稳定,结构完整,反射率和分辨率高。弯曲晶体尺寸为65mm×20mm,弯曲半径为143.3mm。利用该背光成像系统进行了单色X射线背光成像实验。成像物体为3×3阵列的正方形不锈钢网格,利用接收装置磷屏成像板,得到清晰的Cr KαX射线背光源二维空间分辨,在9.6mm×28.7mm的视场范围内,其像的空间分辨率大约为83.3μm。实验结果表明α-石英球面弯曲晶体适合于X射线的背光诊断研究。     

压力载荷下多层波纹管振动特性的仿真分析

基于接触力学和静力学有限元算法,采用壳单元建立了压力载荷作用下的多层无加强、无阻尼波纹管三维有限元模型。运用ANSYS有限元分析软件,对压力载荷作用下的多层无加强、无阻尼波纹管的静力学和振动性能进行了数值模拟,获得了不同压力载荷作用下多层波纹管的应力云图、应变云图、轴向固有频率和振型。设计了一套压力载荷下波纹管振动性能试验装置及方法,利用对数衰减法获得了波纹管的固有频率,验证了有限元模型的正确性。     

客服系统中排队机与CTI技术的对比

本文着重讲述客服系统两种技术的对比，包括结构和特点，最后介绍了思特奇客服系统的特点。     

关于节能监察机构设置问题的几点思考

国家节能法的修订工作正在进行中,目前从节能法修订的前几稿看,都提出了要求建立节能监察机构,肯定了成立节能监察机构的必要性,这对于现行节能法来说是一个很大的进步,也是一个亮     

ZL沙坝区强噪声,低信噪比地震资料的处理方法

常规地震处理一般要求在噪声较弱、信噪比较高的资料上进行,而在 ZL 沙坝区获得的是强噪声、低信噪比资料,按照一般常规方法处理,难度大、成功率较低。经过多次试验,最终获得了可用于地震资料解释的高信噪比剖面。其主要做法是:①精确求取野外静校正量;②采用线性动校正结合f-k 滤波,消除浅层折射干扰;③作振幅补偿、动校正组合、相干和高精度叠加,提高剖面信噪比。     

倒装焊封装对MEMS器件性能影响的有限元分析研究

对2×2、4×4、6×6、8×8面阵列凸点分布形式的倒装芯片分别进行了建模和模拟,分析了面阵列倒装芯片在常规温度载荷下芯片表面应力分布和变形的一般规律,并分析比较了凸点分布形式、基板类型对面阵列倒装芯片表面应力分布的影响,在此基础上估算了应力和变形对典型MEMS器件的影响。对于常规4×4面阵列情况,倒装焊后的悬臂梁吸合电压的最大相对变化率为5%,而固支梁一阶固有谐振频率最大相对变化率为110%。