Flash文件系统的研究与设计

Flash文件系统（FFS）已经成为嵌入式系统中数据存储和数据管理的一个热点。对Flash文件系统结构和功能作了详细深入的研究分析,针对在无OS环境下的应用,提出了一个完整的设计方案。     

日志结构文件系统技术的研究

介绍了一种新的磁盘管理技术－日志结构文件系统，把对文件的修改汇成日志条目顺序地写入磁盘，既加速了写文件的速度，又加速了崩溃恢复的速度，把整个磁盘作为日志，磁盘上包含有效的读取日志结构文件所需的索引信息，为了保持快速写所需的大的磁盘空闲快，将磁盘分成段，用一个清理工线程收集压缩分散到各个段中的有效信息，以一个日志结构文件系统的原型，即Sprite LFS为例，对日志文件系统设计和实现的各个阶段进行了分析，并与Unix的文件系统，即快速文件系统（FFS）进行了比较。     

Fermatean fuzzy linguistic set and its application in multicriteria decision making

In this paper, we propose the concept of Fermatean fuzzy linguistic term sets based on linguistic term sets and Fermatean fuzzy sets. The basic operational laws, the score function, and the accuracy function of Fermatean fuzzy linguistic numbers are provided. Then we propose the Fermatean fuzzy linguistic weighted aggregation operator, the Fermatean fuzzy linguistic weighted geometric operator, and the Fermatean fuzzy linguistic distance measures. Furthermore, we extend the TOPSIS method to the proposed distance measures, and the ranking of alternatives is obtained under a Fermatean fuzzy linguistic environment. An example is provided to illustrate the feasibility and effectiveness of the proposed method, and a comparison with the existing method is also analyzed. Finally, the sensitivity analysis of the parameter in the proposed distance measure is also discussed.     

The Flexible Rare Event Sampling Harness System (FRESHS)

We present the software package FRESHS (http://www.freshs.org) for parallel simulation of rare events using sampling techniques from the ‘splitting’ family of methods. Initially, Forward Flux Sampling (FFS) and Stochastic Process Rare Event Sampling (SPRES) have been implemented. These two methods together make rare event sampling available for both quasi-static and full non-equilibrium regimes. Our framework provides a plugin system for software implementing the underlying physics of the system of interest. At present, example plugins exist for our framework to steer the popular MD packages GROMACS, LAMMPS and ESPResSo, but due to the simple interface of our plugin system, it is also easy to attach other simulation software or self-written code. Use of our framework does not require recompilation of the simulation program. The modular structure allows the flexible implementation of further sampling methods or physics engines and creates a basis for objective comparison of different sampling algorithms.     

头盔显示器光学系统的研究

HMD光学系统的设计非常具有挑战性。本文介绍了HMD光学系统的工作原理和一般组成。理想的HMD光学系统应该重量轻、体积小。为满足这些要求，文中描述了改进传统的HMD光学系统的两种方法，一种是用头盔护目镜和FFS棱镜重新构造HMD光学系统，另一种是用HOE和BOE替代传统的光学元件。这些模式比传统HMD光学系统优越，而且能使HMD光学系统体积小，重量轻。     

Energy-efficient scheduling for a flexible flow shop using an improved genetic-simulated annealing algorithm

The traditional production scheduling problem considers performance indicators such as processing time, cost, and quality as optimization objectives in manufacturing systems; however, it does not take energy consumption or environmental impacts completely into account. Therefore, this paper proposes an energy-efficient model for flexible flow shop scheduling (FFS). First, a mathematical model for a FFS problem, which is based on an energy-efficient mechanism, is described to solve multi-objective optimization. Since FFS is well known as a NP-hard problem, an improved, genetic-simulated annealing algorithm is adopted to make a significant trade-off between the makespan and the total energy consumption to implement a feasible scheduling. Finally, a case study of a production scheduling problem for a metalworking workshop in a plant is simulated. The experimental results show that the relationship between the makespan and the energy consumption may be apparently conflicting. In addition, an energy-saving decision is performed in a feasible scheduling. Using the decision method, there could be significant potential for minimizing energy consumption.     

Fracture analysis of laser beam welded superalloys Inconel 718 and 625 using the FITNET procedure

This paper presents results of the analysis for residual strength prediction of two laser beam welded superalloys (Inconel 625 and 718) using the fitness-for-service (FFS) procedure FITNET. The analysis is based on Option 3 of the Fracture Module of the procedure arising from the European Community funded project FITNET (www.eurofitnet.org). Analysis option 3 requires full stress–strain curves of the materials as input data. Since the strength mismatch ratio (M) between the weld and the base metals for both alloys was less than 10%, a homogeneous solution route has been used for welded tension loaded specimens containing through thickness central cracks. The FITNET predictions of the attained maximum load levels of the specimens were verified with the generated experimental results. The analysis methodology, as well as comparison between predictions and experimental results are provided. Accurate yet conservative estimation of the maximum load carrying capacities have been achieved depending on the input data; as the input data becomes more detailed, the degree of conservatism decreases.     

AFFS技术在大尺寸LCD-TV的进展（英文）

最近我们发展了AFFS技术,做出了32″LED背光源的LCD-TV,色域达到了105%,对比度1200：1,在140°所有视角的对比度达到了100以上,我们采用双轴补偿膜大大提高了颜色漂移的特性。这些光学特性结果的取得是与工艺制作、光学材料的优化、新AFFS像素的设计分不开的。     

我国 FFS 袋用吹塑薄膜发展动态

介绍了生产连续性一次自动成型-开口充料-加热封口（FFS）袋用吹塑薄膜的平膜法和管膜法工艺及三层共挤膜技术，概述了国内FFS袋用吹塑薄膜的生产企业和原料使用情况。FFS袋用吹塑薄膜具有包装速度快、洁净、环保、美观等优势，随着国内合成树脂装置生产规模的扩大，FFS袋用吹塑薄膜将替代传统复合编织袋成为合成树脂包装领域的主导产品。     

Application of instrumented indentation technique for enhanced fitness-for-service assessment of pipeline crack

While most in-field non-destructive technologies for structural integrity diagnosis focus on precise crack detection, a novel instrumented indentation technique for non-destructively determining tensile properties in fields is introduced here. The goal of this work is to apply the newly-developed indentation technique to in-field fitness-for-service (FFS) assessment of linepipe cracks. As one step to verify its applicability, tensile properties in base metal and girth weldement of API-X65-graded linepipe were evaluated by this indentation technique and provided for construction of material-specific failure assessment diagrams (FADs). Results are discussed in terms of the accuracy of the indentation data and how the FAD assessment results are affected by the variation in local tensile properties measured by indenting small target regions such as heat-affected zones (HAZs). Based on the results, we suggest that the indentation technique may be useful for reducing possible difficulties in flaw assessment (arising from the use of incorrect tensile properties) by providing reliably practical data for FAD construction.