带着你的孩子 重温阿童木

越过辽阔天空，啦啦啦，飞向遥远群星，来吧，阿童木，爱科学的好少年。菩良勇敢的，啦啦啦，铁臂阿童木，十万马力，七大神力，无私无畏的阿童木。穿过广阔田地，啦啦啦，潜入深深海洋，来吧，阿童木，爱和平的好少年，善良勇敢的，啦啦啦，铁臂阿童木，我们的好朋友啊，无私无畏的阿童木，我们的好朋友啊，无私无畏的阿童木……     

附录:1995年来大气光学重点实验室公开发表的论文目录

大气光学参数和激光大气传输：1曾宗泳，张骏，翁宁泉，龚知本，温度微结构的高空气球观测.大气科学，1997，21（3）2肖黎明，刘小勤，马成胜，曾宗泳．近地面大气湍流布点遥测系统．气象水文海洋仪器，1996，3：173吴晓庆，曾宗泳，马成胜，翁宁泉，肖黎明.兴隆大气湍流气球探测．量子电子学，1996；13（4）4张骏，曾宗泳，龚知本，对流湍流池相干长度的光学结构.光学学报，1996，16（1）5张骏，曾宗泳，肖黎明，马成胜，翁宁泉．用于波前补偿实验的对流湍流系统的光学特性，光学学报，1997，17（9）6曾宗泳等．复杂地形近地面温度谱。量子…     

像法国人一样生活

欧洲之西，地中海之北，那个菱形的国家，有我曾经5年的生活，这个坐落在德国和西班牙之间的国家，一向以生活节奏缓慢，国民热爱度假，喜欢休闲著称，是的，它就是法国，那个可以颠覆你想像的国家，在这里首先要做的是学会轻松，放下，一切从容，因为从戴高乐机场开始，便已经与世隔绝，放下香港的快节奏、忘记的繁忙，这里是法国，是巴黎，要学会Vivre comme un francais（像法国人一样生活）     

值得所有家长关注：华德福教育圈：请让孩子慢慢长大

华德福不仅是一种教育理念，更是一种生活方式。华德福教育是博大的人智学里的一个重要分支，人智学关心和涉足的领域还包括：“有机企业，有机建筑，人智学医学等等。在成熟的形态下，华德福会以社区的形式出现，社区里不仅有幼儿园，学校，还有农场，医院，治疗中心，商店，等等。在社区里，有共同理念的人群生活在一起，彼此关心，帮助，交流，成长。     

节目质量决定广播的两个效益

本文阐述了广播电台在几大媒体与日俱增的市场竞争中，特别是以广告为主体经营的创收中，广播应发挥自身的优势，扬长避短，科学管理，在节目宣传，管理，策划，采编，播录和合成制作以及技术传输等一系列环节形成合力，广播节目特别是广告节目，要提高质量，办出物色，多出精品，优秀节目，增加广播的收听率，获得良好的社会效益和经济效益。     

感受欧洲文艺复兴的油画世界（上）

八千公里云和月，身略疲，心愉悦，赏欧陆风光，心急切，红瓦绿松车灯亮，初冬德奥首场雪，乐，乐，乐。 无论是疾驰在高速公路上，漫步在城市街头，还是驻足山下湖边，参观官馆，畅游塞纳莱茵，映入眼帘的尽是油画般的世界．或以各种风姿的实景供你欣赏，或以画家的油彩让你品味，风格体裁各异，但美丽高雅迷人相同。     

自如春晓 很有状态

春晓展现给外界看的，是一个曼妙的精灵。美丽，精彩，眩目。可那些只是符号，在另一个世界里，她真实的存在，天真，成熟，简单，复杂，安静，冲动……那个世界似乎遥远，却很自由……     

我的DV色眯眯

夏天来了，鲜艳的色彩，满大街的美女，娇阳似火，秀色可餐，友人相聚，欢声笑语，人间的天伦之乐尽在每一秒与自己爱人相处的过程中，正所谓“仁者见仁，淫者见淫”，性感的人眼中全是撩拨与风情，鲜艳的颜色加上漂亮的MM，制作出DV短片来，刚好烘托夏日绚丽的气氛，今天，我们就来聊聊DV的懵懂“色”眼吧。     

趋势2003

历经风云变幻，2003年，中国电信业的发展站在了一个新的起点。新的一年，承改革成就，借十六大东风，百万信息产业大军将与时俱进，开拓创新，激情演绎电信业的2003，为电信业走出冬天，走向新的辉煌而奋战。站在这新的起点，畅想电信业未来一年的发展，我们渴望电信业的发展能峰回路转，红红火火，波澜壮阔，蒸蒸日上，希望每一位通信人都前程似锦，事业发达。     

通用变频器应用技术指南——变频器的操作

本文面向变频器使用的用户，从事变频器应用和系统设计维护人员，销售人员，维修人员。文中介绍了变频器的原理，森兰变频器的基本系列，附加配套设备的选用，安装技术和禁忌，与周边设备的关系，安装后的调试，操作使用方法，日常维护保养，常见故障检查，判断处理，以及典型应用事例。     

A double-gate-type static-induction thyristor

A double-gate-type static-induction thyristor (DG-SIThy) with a high blocking voltage and a high current rating has been fabricated. In this paper, a basic operational mechanism, a fabrication procedure, and the electrical characteristics of the DG-SIThy are described. In the DG-SIThy, both electron injection and hole injection are controlled by signals applied to two gale regions so that the DG-SIThy is capable of higher frequency operations than a single-gate SIThy. In the DG-SIThy, described here, both a cathode and a gate (first gate) regions have been fabricated on one side of a semiconductor wafer and both an anode and gate.(second gate) regions on another side. For realizing the DG-SIThy with a high blocking voltage and a high current rating, we have tried attentively to form a p-n junction on one side of the wafer without influencing the p-n junction on the other side, and have developed a new counter-doping technique for epitaxial growth and an improved package structure for a compression-mounted device. The DG-SIThy fabricated with these techniques has shown a for-Ward blocking voltage of 1000 V, an average current rating of 100 A, and a forward voltage drop of 1.44 V at the rated anode current. A turn-on time of 0.95 its and a turn-off time of 0.48 µs have been observed at the rated anode current and at anode voltages of 650 and 550 V, respectively. As already speculated, the DG-SIThy shows a higher switching speed and a lower forward drop than the single-gate SIThy.     

Modeling the flow-level performance of hierarchical modulation in?OFDMA-based networks

Hierarchical Modulation (HM) is a means to enhance the spectral efficiency of a system by superposing, in terms of modulation, an additional stream for a given user with good radio conditions on a basic stream of a user with worse radio conditions. This, in turn, increases the throughput of the former user and hence the overall performance of the whole system. We consider, in this work, such a performance at the flow level, for a realistic dynamic setting where users come to the system and leave it after a finite duration corresponding, for instance, to the completion of a file transfer. We specifically model and quantify, both analytically and via simulations, the gain thus achieved and propose two extensions to the basic HM algorithm: a first one in which a user with bad radio conditions is also superposed on one with better radio conditions and a second one in which a user of one type is further superposed on a user of the same type as well.     

Virtual impedance control for a regional dynamic voltage restorer

A dynamic voltage restorer (DVR) can be installed in a middle-voltage (MV) power grid, to concurrently protect a cluster of sensitive loads from voltage sags. To further improve its efficiency and reduce the difficulty in its implementation, a novel control strategy for operating such a DVR as a virtual impedance in series with sensitive loads is proposed in this paper. In addition to its usual function of compensating for voltage sags, such a DVR can also operate as a virtual inductance, to function as a fault current limiter (FCL) during a downstream fault, or a virtual capacitance, to function as a series compensator (SC) to compensate the voltage loss along the feeder line during heavy load. Based on a dual-loop control design, strategies for operating a DVR as a series virtual inductance and a virtual capacitance are proposed, and methods for tuning the parameter values and a stability analysis of the whole system are presented. The feasibility and effectiveness of the proposed method are verified by simulations using the PSCAD software, and experimental results obtained using a prototype DVR are presented.     

Ultra-Low-Power Interface Chip for Autonomous Capacitive Sensor Systems

Traditionally, most of the sensor interfaces must be tailored towards a specific application. This approach results in a high recurrent design cost and time to market. On the other hand, generic sensor interface design reduces the costs and offers a handy solution for multisensor applications. This paper presents a generic sensor interface chip (GSIC), which can read out a broad range of capacitive sensors. It contains capacitance-to-voltage converters, a switched-capacitor amplifier, an analog-to-digital converter, oscillators, clock generation circuits and a reference circuit. The system combines a very low-power design with a smart energy management, which adapts the current consumption according to the accuracy and speed requirements of the application. The GSIC is used in a pressure and an acceleration monitoring system. The pressure monitoring system achieves a current drain of 2.3 muA for a 10-Hz sample frequency and an 8-bit accuracy. In the acceleration monitoring system, we measured a current of 3.3 muA for a sample frequency of 10 Hz and an accuracy of 9 bits     

Self-reflective segmentation of human bodily motions using recurrent neural networks

For realizing a naturalistic collaboration between the human and the robot, we have to establish the intention sharing from the series of motion data that are observed and exchanged between the human and the machine. In a word, this is a problem to detect "meanings" out of the digitized data stream. In this paper, we propose a novel approach based on semiosis, and present a method of interpreting bodily motions using recurrent neural networks called Elman networks. We made some experiments using the raw data acquired while a human performs a simple task of fetching objects by stretching and folding his/her arm, and demonstrate that the network can learn invariant features of the generalized motion concepts, classify the motion by referring to self-organized memory structure, and understand a task structure of the observed human bodily motion. These capabilities are essential for machine intelligence to establishing the human-robot shared autonomy, a new style of human-machine collaboration proposed in the area of robotics.     

Maximum likelihood parameter estimation of textures using aWold-decomposition based model

We present a solution to the problem of modeling, parameter estimation, and synthesis of natural textures. The texture field is assumed to be a realization of a regular homogeneous random field, which can have a mixed spectral distribution. On the basis of a 2-D Wold-like decomposition, the field is represented as a sum of a purely indeterministic component, a harmonic component, and a countable number of evanescent fields. We present a maximum-likelihood solution to the joint parameter estimation problem of these components from a single observed realization of the texture field. The proposed solution is a two-stage algorithm. In the first stage, we obtain an estimate for the number of harmonic and evanescent components in the field, and a suboptimal initial estimate for the parameters of their spectral supports. In the second stage, we refine these initial estimates by iterative maximization of the likelihood function of the observed data. By introducing appropriate parameter transformations the highly nonlinear least-squares problem that results from the maximization of the likelihood function, is transformed into a separable least-squares problem. The solution for the unknown spectral supports of the harmonic and evanescent components reduces the problem of solving for the transformed parameters of the field to a linear least squares. Solution of the transformation equations then provides a complete solution of the field-model parameter estimation problem. The Wold-based model and the resulting analysis and synthesis algorithms are applicable to a wide variety of texture types found in natural images.     

Development of a standing style transfer system "ABLE" for disabled lower limbs

We have developed a standing style transfer system, or "ABLE," for a person with disabled legs. It allows travel in a standing posture even on uneven ground, a standing up motion from a chair, and allows the stairs. ABLE consists of three modules: a pair of telescopic crutches, a powered lower extremity orthosis, and a pair of mobile platforms. We present here the conceptual design of ABLE and the motion of each module. Cooperative operations using the three modules are discussed through simulations. The standing up motion from a chair and ascending the stairs, however, have problems with adaptability to the environment and safety, because it executes the movement that has till now relied on telescopic crutches. To solve these problems, we propose a new motion technique and compare it with the previous one. In this paper, some experimental results are also presented.     

A 2-V CMOS cellular transceiver front-end

This work presents the design and implementation of a 2-V cellular transceiver front-end in a standard 0.25-μm CMOS technology. The prototype integrates a low-IF receiver (low noise amplifier, I/Q mixers, and VGAs) and a direct-upconversion transmitter (I/Q mixers and pre-amplifier) on a single die together with a complete phase-locked loop, including a 64/79 prescaler, a fully integrated loop filter, and a quadrature voltage controlled oscillator with on-chip inductors. Design trade-offs have been made over the boundaries of the different building blocks to optimize the overall system performance. All building blocks feature circuit topologies that enable comfortable operation at low voltage. As a result, the IC operates from a power supply of only 2 V, while consuming 191 mW in receiver (RX) mode and 160 mW in transmitter (TX) mode. To build a complete transceiver system for 1,8-GHz cellular communication, only an antenna, an antenna filter, a power amplifier, and a digital baseband chip must be added to the analog front-end. This work shows the potential of achieving the analog performance required for the class I/II DCS-1800 cellular system in a standard 0.25-μm CMOS technology, without tuning or trimming     

The Uniform Correlation Matrix and its Application to Diversity

We consider a complex-valued L times L square matrix whose diagonal elements are unity, and lower and upper diagonal elements are the same, each lower diagonal element being equal to a (a ne 1) and each upper diagonal element being equal to b (b ne 1). We call this matrix the generalized semiuniform matrix, and denote it as M(a, b,L). For this matrix, we derive closed-form expressions for the characteristic polynomial, eigenvalues, eigenvectors, and inverse. Treating the non-real-valued uniform correlation matrix M(a, a*, L), where (middot)* denotes the complex conjugate and a ne a*, as a Hermitian generalized semiuniform matrix, we obtain the eigenvalues, eigenvectors, and inverse of M(a, a*, L) in closed form. We present applications of these results to the analysis of communication systems using diversity under correlated fading conditions     

Design and analysis of novel quorum-based sink location service scheme in wireless sensor networks

Geographic routing in wireless sensor networks requires sources nodes to be aware of the location information of sinks to send their data. To provide the sink location service, quorum-based schemes have been proposed, which exploit crossing points between a quorum of a sink location announcement (SLA) message from a sink and a quorum of a sink location query (SLQ) message from a source node. For guaranteeing at least one crossing point in irregular sensor networks with void areas or irregular boundaries, the previous schemes however collect and flood the network boundary information or forward a SLA and SLQ message along the whole network boundary. In this paper, we design a novel quorum-based sink location service scheme that exploits circle and line quorums, which does not require the network boundary information and send a SLA and SLQ message along the whole network boundary. In the proposed scheme, a source node sends a SLQ message to the network center and sends another SLQ message to an edge node in the network boundary, thus generating a SLQ line quorum. On the other hand, a sink node sends a SLA message along a circle path whose center is the network center, thus forming a SLQ circle quorum. By this way, it is guaranteed that the SLQ and SLA quorums have at least one crossing point in irregular sensor networks. Both numerical analysis and extensive simulation results verify that the proposed scheme outperforms the existing schemes in terms of the delivery distance, the delivery hop count, and the energy consumption for providing sink location service.