基于S3F9488与CP2512的电子产品应用设计

运用电容触摸检测芯片CP2512与单片机S3F9488进行电路设计.触摸检测芯片CP2512通过检测电容的变化量来感知外界数据的变化,通过I2C协议把CP2512采集的数据送到S3F9488,S3F9488根据采集到的数据进行相应的功率控制.本文给出了CP2512与S3F9488的硬件设计图.该方案的设计可以使家电产品更加耐用、美观;能有效地提高产品的抗干扰能力,提升产品的品质.该电路的设计为家电产品提够了一种低成本解决方案,最终在电磁炉中得到了实现.     

Stretchable Anti-Fogging Tapes for Diverse Transparent Materials

Surface wetting prevents surface fogging on transparent materials by facilitating filmwise condensation with specific chemistry, but suffers from material and geometry selectivity. Extreme environments associated with high humidity and mechanical loading further limit their anti-fogging persistence. Here, a stretchable anti-fogging tape (SAT) that can be applied to diverse transparent materials with varied curvatures for persistent fogging prevention is reported. The SAT consists of three synergistically combined transparent layers: i) a stretchable and tough layer with large elastic recovery, ii) an endurant anti-fogging layer insensitive to ambient humidity, and iii) a robustly and reversibly adhesive layer. The SAT maintains high total transmittance (>90%) and low diffuse transmittance (<5%) in high-humidity environments, under various modes of mechanical deformations, and over a prolonged lifetime (193 days tested so far). Two applications are demonstrated, including the SAT-adhered eyeglasses and goggles for clear fog-free vision, and the SAT-adhered condensation cover for efficient solar-powered freshwater production.     

基于IMU数据与双星定位系统组合的机载SAR运动补偿

该文主要介绍了机载SAR平台运动误差中惯性测量单元(IMU)系统误差的补偿方法。由于双星定位系统误差不随时间递增,该文利用双星定位系统(GEOSTAR)与IMU进行组合,消除随时间递增的IMU系统误差,提高IMU定位精度,从而减轻SAR成像处理器运动补偿的负担。     

Effect of a cover layer on the edge admittance of a wide microstrip

The canonical problem of a grounded dielectric slab with a truncated upper conductor and a dielectric cover layer is solved by the Wiener-Hopf technique. The method yields the value of the reflection coefficient at the open edge and the equivalent edge admittance. Numerical results show that the presence of a cover layer increases both the conductance and the susceptance. An increase in the value of edge conductance corresponds to an increase in the radiated power and surface-wave power. An increase in the value of the susceptance corresponds to an increase in the fringing capacitance at the edge. This results in a reduction of the physical length of a resonant rectangular patch. On the basis of Wiener-Hopf analysis it is seen that the space-wave power and the power carried by the surface wave are separated from the total radiated power. The numerical results show that the radiation efficiency decreases with an increase in the cover layer thickness     

氧化铝模板法制备Ge纳米线

采用氧化铝模板法结合具有高真空背景的低压化学气相沉积技术制备出 Ge纳米线 .在氧化铝模板的背面喷金作为催化剂 ,合成了 Ge纳米线 .采用原子力显微镜、X射线衍射、透射电镜、能量散射谱等手段对 Ge纳米线进行了分析 .Ge纳米线的直径约为 30 nm,长度超过 6 0 0 nm.对 Ge纳米线的生长机理进行了探讨 .     

Growth of GaAs1−xPx/GaAs and InAsxP1−x/InP strained quantum wells for optoelectronic devices by gas-source molecular beam epitaxy

In this paper we show that pseudomorphically strained heterostructures of InAs _x P_1−x /InP may be an alternative to lattice-matched heterostructures of In_1−x Ga _x As _y P_1−y /InP for optoelectronic applications. We first studied the group-V composition control in the gas-source molecular beam epitaxy (GSMBE) of the GaAs_1-x P _x /GaAs system. Then we studied GSMBE of strained InAs _x P_1−x /InP multiple quantum wells with the ternary well layer in the composition range 0.15 <x < 0.75. Structural and optical properties were characterized by high-resolution x-ray rocking curves, transmission electron microscopy, absorption and low-temperature photoluminescence measurements. High-quality multiple-quantum-well structures were obtained even for highly strained (up to 2.5%) samples. The achievement of sharp excitonic absorptions at 1.06, 1.3 and 1.55μm at room temperature from InAs _x P_1−x /InP quantum wells suggests the possibility of long-wavelength optoelectronic applications.     

{雕刻时光}索尼DVD 602E

对于索尼602E而言，雕刻已经不仅仅是一种艺术，而是一种时尚、一股潮流。[编者按]     

A novel search method to reduce PAPR of an OFDM signal using partial transmit sequences

One of the main drawbacks of orthogonal frequency division multiplexing (OFDM) is the high peak‐to‐average power ratio (PAPR) of the transmitted OFDM signal. Partial transmit sequence (PTS) technique can improve the PAPR statistics of an OFDM signal. As ordinary PTS technique requires an exhaustive search over all combinations of allowed phase factors, the search complexity increases exponentially with the number of sub‐blocks. In this paper, we propose a novel PTS technique with reduced complexity that each level inverts twice of phase factor bits from previous level. Then we also use initial random phase sequence to find the better search way of PAPR reduction. Numerical results show that the proposed method can achieve significant reduction in search complexity with little performance degradation. Copyright © 2006 John Wiley & Sons, Ltd.     

Versatile Graphene‐Promoting Photocatalytic Performance of Semiconductors: Basic Principles,Synthesis, Solar Energy Conversion,and Environmental Applications

Graphene‐semiconductor nanocomposites, considered as a kind of most promising photocatalysts, have shown remarkable performance and drawn significant attention in the field of photo‐driven chemical conversion using solar energy, due to the unique physicochemical properties of graphene. The photocatalytic enhancement of graphene‐based nanocomposites is caused by the reduction of the recombination of electron‐hole pairs, the extension of the light absorption range, increase of absorption of light intensity, enhancement of surface active sites, and improvement of chemical stability of photocatalysts. Recent progress in the photocatalysis development of graphene‐based nanocomposites is highlighted and evaluated, focusing on the mechanism of graphene‐enhanced photocatalytic activity, the understanding of electron transport, and the applications of graphene‐based photocatalysts on water splitting, degradation or oxidization of organic contaminants, photoreduction of CO₂ into renewable fuels, toxic elimination of heavy metal ions, and antibacterial applications.     

1993年汛期黄河下游河势遥感调查

利用ＭＥＲＩＤＩＡＮ遥感图象处理系统，通过ＴＭ图象最佳波段组合、线性拉伸放大、密度分割等处理手段，首次在黄河上进行了卫星遥感河势调查，其优势在于：（１）可以弥补目估河势的不足；（２）能够对河势流路、主流线位置、洪漫滩范围及水边线、生产堤、主要滩区洪水进出口门位置、进水和水围村庄等准确定位；（３）可以详细计算各类滩区面积与分布密度。