基于CC的单输入三输出双二阶滤波结构

提出了一种电流模式多功能滤波结构。这种结构仅使用５个ＣＣ器件，３个接地电阻和两个接地电容。选择三具输出端中的一个或它们的组合即可实现五种基本的二阶滤波功能，元件灵敏度很低。比Ｓｅｎａｎｉ提出的结构简单。     

用改进式电流传送器实现二阶电流模式状态变量滤波器

提出了用改进式电流传送器实现二阶电流模式状态变量滤波器新电路，并由此得到了高通、带通、低通滤波特性。计算机仿真结果表明理论分析是正确的，所提电路具有灵敏度甚低的特点。     

一种具有独立输出端口的电流传送器二阶电流模滤波器

提出了一种具有独立输出端口的电流传送器二阶电流模滤波器的新电路，并由此得到了高通、带通和低通滤波特性．该电路具有敏感度较低和ＲＣ元件数较少的特点     

电流模式三阶低通高通滤波器的跳耦实现

利用Ｋ．Ｐａｌ提出的改进式ＣＣⅡ系统地生成了电流模式ＣＣⅡ基本积木块电路．在此基础上,提出了电流模式三阶低通、高通跳耦滤波器的设计办法．计算机仿真结果表明设计电路完全正确．此法简单,可推广到更高阶的电流模式低通、高通有源滤波器的设计     

基于多输出端电流传送器（MOCC）的电流模式滤波器

提出了用ＭＯＣＣ器件实现双二阶和一阶函数的电流模式滤波器新电路．仅使用３个ＭＯＣＣ器件、３个接地电阻和３个接地电容,选择电路三个输入端口不同的输入信号的组合,不仅在Ｉ０２输出端能实现低通、高通、带通、陷波和全通五种基本的二阶滤波功能,而且在Ｉ０１端能同时得到一阶低通、高通、全通滤波函数,比ＣｈａｎｇＣＭ和ＣｈｅｎｇＰＣ所提电路结构简单,且功能更完善．为了验证理论分析的正确性,对二阶低通、高通、带通、陷波和全通及一阶低通、高通、全通滤波器均进行了计算机仿真．所提电路不仅ω０和Ｑ值可调而且具有无源灵敏度低的特点．     

采用单FTFN的电流模式全通隐波滤波器实现

提出了采用单四端浮点零器实现电流模式二阶全通／陷波和一阶全通滤波器新电路,该电路具有高输出阻抗和氏无源灵敏度特点。     

基于MOCC的电流模式高通滤波器

在典则 FL F结构的基础上 ,提出了一个利用多端输出电流传送器 ( MOCC)实现的电流模式高通滤波器 .给出了系统的设计公式 .作为例子 ,设计了一个四阶 Butterworth高通滤波器 ,模拟仿真结果与理论分析吻合     

多功能多级电流模式双二阶滤波器

提出了一种新的多级电流模式双二阶滤波器通用结构，可获得电流模式二阶高通、低通、带通、全通和陷波滤波功能。该结构中的核心电路可集成在一起，仅需外接几只可调电阻便可以实现Ｑ、ω０和Ｇ的独立调节，这种滤波结构具有较高的输出阻抗和电流滤波增益，元件灵敏度较低。文章还给出了这种结构的简化模型和设计示例。     

一种新颖的高阶全极点CC高通滤波器

提出了一种高阶全极点ＣＣ高通滤波器的设计方法．用该方法对二～七阶最平坦型Ｂｕｔｔｅｒ－ｗｏｒｔｈ高通滤波器进行了设计和ＰＳＰＩＣＥ模拟分析,结果与理论分析吻合,表明本文所提方法的可行性．     

采用单FTFN的电流模式全通陷波滤波器实现

提出了采用单四端浮点零器(FTFN)实现电流模式二阶全通/陷波和一阶全通滤波器新电路.该电路具有高输出阻抗和低无源灵敏度特点.     

New Oligocene Primates from China Highlight Ancient Climate Change as Possible Evolution Filter

正Profound environmental and faunal changes are associated with climatic deterioration during the Eocene-Oligocene transition(EOT)roughly 34 million years ago.Primates are among the most environmentally sensitive of all mammals.Reconstructing how Asian primates responded to the EOT,however,has been hindered by a sparse record of Oligocene primates on that continent.     

Functional Reliability of Structures

A general theoretical foundation of structural system reliability analysis is presented. Both an analytical and a numerical formulation for evaluating a relative reliability measure of a structural system is developed in which general random factors affecting both strength and loading can be included. The reliability of a suspension bridge is analyzed as an example; the effect of dead load, used as a proof load, is also studied.     

Analysis of Fabric Structures

This paper deals with some practical aspects of the analysis of fabric (tension) structures. It is limited in scope to problems of small strain with large rotation for linear isotropic fabrics. It is Newtonian in approach and begins with a discussion of the effect of prestress upon the analysis required; the geometric stiffness matrix is then discussed and it is shown how this matrix can be developed using only equilibrium equations; finally, computer programs for the analysis of fabric structures are discussed. The highly nonlinear constitutive equations of some common fabrics will be considered in a later effort.     

Carbon of Magical Structures

<正>As one of the Partner Groups which were initiated to promote scientifi c exchanges and collaborations between the Max Planck Society(MPS)and the Chinese Academy of Sciences(CAS),the Partner Group led by Prof.Dr.ZHI Linjie was established on May,2010.During the past three years,the group received substantial support from the CAS and the Max-Planck-Institute for Polymer Research(MPIP)for extensive exchanges and collaborations on carbon-rich nanomaterials.Productive collaborations between the researchers and the students from the National Center for Nanoscience and Technology(NCNST)and the MPIP as well as the collaborations between the Partner     

一种程控滤波器的设计

该程控滤波器以LPC2138为控制核心,由可编程运算放大器、模拟滤波器、键盘与显示等功能模块组成。通过键盘设置参数,实现了放大器放大增益、低通和高通滤波器的带通频率步进调节功能。实验数据表明,该设计方案正确可行。     

波导型定向滤波器的研究

定向滤波器是一个完全匹配的四端口器件,它有着类似滤波器的频率特性.波导型定向滤波器利用圆极化波导来实现信号的定向分配,本文介绍了它的原理及设计方法,给出了仿真实例.