基于频率采样技术的FIR数字滤波器优化设计

本文提出了一种FIR数字滤波器满意优化设计方法，将滤波器过渡带样本值作为优化变量，通过设计通带、过渡带和阻带性能指标满意度函数和综合满意度函数，构造出满意优化模型，并用本文提出的新量子遗传算法搜索满意解，FIR高通和带阻数字滤波器的设计结果表明，采用满意优化方法设计的FIR滤波器的性能优于传统方法。     

Ernest Hemingway As a Pre- existentialist——An Analytical Study of the Existentialist Ideas in His Work

Ernest Hemingway is hailed by many critics as a great craftsman, and“the most important, outstanding author since the death of Shakespeare”. On the other hand, he is severely criticized by critics who doggedly insist that Hemingway is too limited, his theme is too narrow, and, his characters are mute, insensitive and uncomplicated man. However, a very important aspect in the evaluation of Hemingway seems to have been overlooked both by those who devoutly adore him and those who strongly disparage him. This thesis therefore proposes to take a new perspective in exploring Hemingway‘s writing in the hope of exposing his existentialist ideas - consisting of “the absurd world” , “nada of life”, and “choice and code.” -as expressed in both his maior and his minor work.     

重钢烧结厂球团生产工艺实践

简要分析了重钢球团投产后生产水平低的主要原因，介绍了实施达产攻关的主要技术措施、效果及今后仍需解决的问题。     

A Survey of E-Commerce Security

E-commerce is a very active field of Internet research. A very important aspect of e-commerce is its security. Because of the variety of e-commerce applications, many security policies, protocols and techniques are involved in the deployment of the security. The related standards and protocols of e-commerce are studied in this paper. The general model of e-commerce security is set forth. In this model, two most important e-commerce protocols including secure sockets layer (SSL) and secure electronic transaction (SET) are analyzed. The open problems and new trends of e-commerce security are presented.     

Pre-bainitic Transformation in Fe-Ni Alloy

Ｔｈｅｐｒｅ－ｂａｉｎｉｔｉｃｐｈｅｎｏｍｅｎｏｎｉｓｏｎｅｏｆｔｈｅｉｍ－ｐｏｒｔａｎｔｓｕｂｊｅｃｔｓｏｆｂａｉｎｉｔｉｃｔｒａｎｓｆｏｒｍａｔｉｏｎｗｈｉｃｈｉｓｓｔｉｌｃｏｎｔｒｏｖｅｒｓｉａｌ．Ｏｎｅｖｉｅｗｉｓｔｈａｔｔｈｅｓｏｌｕｔｅａ...     

分光光度法测定二氧化硫脲中的硫脲

本文研究了二氧化硫脲中硫脲含量的分光光度测定法。利用在ｐＨ２～３的醋酸介质中，硫脲被ＮａＮＯ２氧化生成ＨＳＣＮ的性质，通过测量ＨＳＣＮ与Ｆｅ（Ｎｏ３）３反应生成红色配合物Ｆｅ（ＳＣＮ）２＋的吸光度，从而测定硫脲的含量。方法线性范围为０～１．０ｍｇ／２５ｍｌ，回收率为９５．０～１０４、８％。     

Anticipating Degradation in State Estimation Accuracy via Online Nonlinear Observability Analysis

A methodology is proposed to enable real-time evaluation of the observability of local motions, and generate a local observability cost map to enable informed local motion planning in order to avoid potential degradation or degeneracy in state estimator performance. The proposed approach leverages efficient numerical techniques in nonlinear observability analysis and motion primitive-based planning technique to realize the local observability prediction with real-time performance. The degradation of the state estimation performance can be readily predicted with the local observability evaluation result. The proposed approach is specialized to a representative optimization-based monocular visual-inertial state estimation formulation and evaluated through simulation and experiments. The experimental results demonstrated the ability of the proposed methodology to correctly anticipate the potential state estimation degradation.