基于有效跟踪的平均渐进瞬时差分学习遗忘算法

智能体通过学习最优决策来解决其决策问题.激励学习方法是智能体通过与其所处的环境交互来改进它自身的行为.Markov决策过程(MDP)模型是求解激励学习问题的一般框架,瞬时差分TD(λ)是在MDP模型下与策略相关的学习值函数的一种算法.一般情况下,智能体必须记住其所有的值函数的值,当状态空间非常大时,这种记忆的量是大得惊人的.为了解决这个问题,给出了一种遗忘算法,这种算法把心理学的遗忘准则引入到了激励学习之中.利用遗忘算法,可以解决智能体在大状态空间中的激励学习问题.     

The response of the adult and ATD heads to impacts onto a rigid surface

Given the high incidence of TBI, head injury has been studied extensively using both cadavers and anthropomorphic test devices (ATDs). However, few studies have benchmarked the response of ATD heads against human data. Hence, the objective of this study is to investigate the response of adult and ATD heads in impact, and to compare adult Hybrid III head responses to the adult head responses.     

气相色谱与热脱附联用测定环境空气及无组织排放工业废气中三氯乙烯

建立了热脱附仪和气相色谱联用测定环境空气及无组织排放工业废气的三氯乙烯分析方法，该方法的检测限为〈0．054μg，当采样体积为13．5L时，方法的最低检出浓度为0．004mg／m^3。在所选定的操作条件下，对400ng三氯乙烯标准进行重复6次的测定，所得的相对标准偏差低于11．0％。该方法已用于环境空气和无组织排放工业废气的测定，取得令人满意的结果。     

Effect of body-borne equipment on injury of military pilots and aircrew during a simulated helicopter crash

Military helicopter pilots are expected to wear a variety of items of body-borne equipment during flight so as to be prepared for any situation that may arise in combat. Helicopter seats are designed to a specified weight range for an occupant with equipment. This paper investigates how distributing the equipment on the body affects injury potential during a helicopter crash. A finite element model representing a helicopter seat with a fully deformable 50th percentile Hybrid III carrying equipment was developed. The model was subjected to a standard military certification crash test. Various equipment configurations were investigated and analysed to determine its influence on the risk of injury. It was found that placing the equipment low on the torso, i.e. near the thighs, not only reduces the likelihood of injury in the lumbar, spinal region but also provides favourable results in neck and head injury risk when compared to other configurations investigated. In contrast, placing equipment high on the torso, i.e. close to the chin, increases the lumbar load and implicitly, the risk of head injury. A statistical analysis is carried out using the Wilcoxon Signed Rank Test to deliver probability of loads experienced within a certain interval. This study recommends an equipment configuration that improves survivability for an occupant seated on a fixed load energy absorbing seat which is subjected to Military Standard 58095A Test 4.     

Determining diffusion and partition coefficients of VOCs in cement using one FLEC

The diffusion and partition coefficients of eight volatile organic compounds (VOCs) in cement slabs were experimentally determined using a field and laboratory emission cell (FLEC) system based on the method developed in a previous study on the water vapor diffusion. A cement slab planted with a mixture of eight VOCs was placed in an one-FLEC system to undergo the mass diffusion in the slab and the emission to air flowing through the FLEC. The concentration of each VOC in the air flowing out of the FLEC was measured according to the EPA Method TO-17 using sorbent tube-automatic thermal desorption (ATD) and the gas chromatography-mass spectrum detector (GC-MSD) system. The diffusion and partition coefficients were then obtained by solving the inverse problem of the one-dimensional unsteady mass diffusion equations in the cement slab. And, the partition coefficient was also obtained from the total mass transfer estimated from the VOC concentration measurements and air flowrate, which was equivalent to the headspace concentration-weighting method.     

Accelerated time domain imaging algorithm and its autofocus approach

The measurement accuracy of a navigation system is inadequate for airborne synthetic aperture radar (SAR). This may seriously degrade the image quality. In this paper, we propose an accelerated time domain (ATD) imaging algorithm combined with the autofocus method. By introducing the global pseudo polar coordinate (GPPC), we construct the Fourier transform pair (FTP) relationship. Then, the weighted least square phase gradient autofocus (WLS-PGA) algorithm is adopted to implement accurate phase error compensation. This method uses fast Fourier transform to implement sub-image fusions instead of time-consuming two-dimensional interpolation. Also, it has good compatibility with the high-accuracy autofocus algorithm to estimate the residual motion errors within the radar echoes and to obtain a well-focused image.     

一种新型地址变化探测技术在SRAM中的应用

本文提出了一种采用两级电路实现的地址变化探测器。与传统地址变化探测电路相比较,该设计显著提高了SRAM的抗噪声、抗干扰能力。     

CMOS/SOI64Kb静态随机存储器

对一种 CMOS/ SOI6 4Kb静态随机存储器进行了研究 ,其电路采用 8K× 8的并行结构体系 .为了提高电路的速度 ,采用地址转换监控 ( Address- Translate- Detector,ATD)、两级字线 ( Double- Word- L ine,DWL)和新型的两级灵敏放大等技术 ,电路存取时间仅 40 ns;同时 ,重点研究了 SOI静电泄放 ( Electrostatic- Discharge,ESD)保护电路和一种改进的灵敏放大器 ,设计出一套全新 ESD电路 ,其抗静电能力高达 42 0 0— 45 0 0 V.SOI6 4KbCMOS静态存储器采用 1.2 μm SOI CMOS抗辐照工艺技术 ,芯片尺寸为 7.8m m× 7.2 4mm     

CMOS/SOI4kb静态随机存储器

对一种CMOS/SOI4kb静态随机存储器进行了研究,其电路采用1k×4的并行结构体系.为了提高电路的速度和降低功耗,采用地址转换监控Address-Translate-Detector(ATD)、两级字线Double-Word-Line(DWL)和新型的两级灵敏放大等技术,其地址取数时间为30ns,最小动态工作电流为30mA(工作电压5V,工作频率2MHz),静态维持电流为1mA.CMOS/SOI4kb静态随机存储器采用1.2μm单层多晶、双层金属的SOICMOS抗辐照工艺技术,其六管存储单元尺寸较小12.8μm×8.4μm,芯片尺寸为3.6mm×3.84mm.