查询词典 analog experiment

along with the development of digital technology,digital filters are widely used in many fields,this paper introduces how to design a iir digital notch filters in matlab environment.the design of digital notch filters can be achieved through three steps:firstly,the design of analog lowpass filter; secondly,it is analog lowpass to analog band stop filter conversion;at last,using the bilinear transformation make the analog notch filters change into digital notch filters.the paper also introduces how to design the transfer function of the digital notch filters using all the zeros and farthest points at the same time,it also introduces the program of the digital notch filters under butterworth analog lowpass prototype.

摘 要：随着数字技术的发展，数字滤波器在许多领域得到广泛的应用。研究一种在matlab语言环境下设计iir数字陷波滤波器的方法，在数字陷波滤波器设计过程中，先进行模拟低通滤波器的设计，然后进行模拟低通/模拟带阻滤波器转换，最后采用双线性变化法将模拟陷波滤波器转化成数字陷波滤波器。提出一种用所有零点和极点来表达数字陷波器传递函数的方法，同时给出以巴特沃斯模拟低通为原型设计数字陷波滤波器的程序。关键词：无限冲激响应；巴特沃斯滤波器；数字陷波滤波器；matlab；双线性变换

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The method comprises the steps of: constructing a testing system which inputs digital codes and outputs simulated values of the analog-digital converter; obtaining a comparison table which is output through inputting responded simulated values of different digital codes from 0 to 2N-1 of the analog-digital converter; calculating to obtain an integration non-linear error comparison table corresponding to different digital code input of the analog-digital converter; compensating integration non-linear errors of the analog-digital converter through a hardware compensating method of adding a subtracter; and obtaining accurate analog-digital converter output.

搭建数模转换器的数字码输入-模拟值输出的测试系统；获得数模转换器从0到2 N -1的不同数字码输入响应的模拟值输出的对照表；计算得到数模转换器相应于不同数字码输入的积分非线性误差的对照表；通过加入减法器的硬件补偿方法，补偿数模转换器的积分非线性误差，获得准确的数模转换器输出。

This text tries to optimize the physical experiment teaching of junior middle school, will demonstrate partly the experiment will be dealt with to students, improve students and study the physical interest, strengthen students' sense of participation; Will demonstrate partly the experiment changes into and divides into groups to probe into the experiment, enable students to practise physics and probe into the course, grasp the scientific research approach; Organize students to join the interest group, make the teaching aid of physical experiment, strengthen student's manipulative ability, arouse students and study physical enthusiasm; Encourage students to develop the new experiment in the experiment lesson, protect students' curiosity; Increase the interesting experiment and verify the experiment, strengthen student's perceptual knowledge to the physical phenomenon, and broaden student's outlook and thinking; Increase experiment and phenomenon involved in the exercise flexibly, utilize practice to prove the theory is derived, strengthen convincingness.

本文尝试优化初中物理实验教学，将部分演示实验交给学生处理，提高学生学习物理兴趣，增强学生的参与感；将部分演示实验改为分组探究实验，让学生能实践物理探究过程，掌握科学研究方法；组织学生参加兴趣小组，制作物理实验教具，增强学生动手能力，调动学生学习物理积极性；在实验课中鼓励学生开发新实验，保护学生的好奇心；增加趣味实验以及验证实验，加强学生对物理现象的感性认识，并且开阔学生的视野和思维；灵活增加习题中涉及到的实验和现象，利用实践证明理论推导，增强说服力。

To keep away from digital distortion caused by analog conversion,"Boutique Recording" applies APOGEE Analog to Digital Converter System in pre-recording, adopts Hi-End Prism Sound Digital to Analog Converter System during post mix and master disposal processes. In a word,"Boutique Recording" minimizes the distortion rate, and maintains the unique spirit of analog music.

为避免后期缩混时过多数字设备所造成的数码味，录音师坚持在前期录音与母带处理过程中使用传奇的模拟设备，在现场录音的同时进行立体声混音工作，为了避免模数转换时所造成的数字失真，达人艺典在前期录音中采用APOGEE模数转换系统，后期缩混及母带制作采用顶级HI-END厂牌Prism Sound数模转换系统，将失真率减到最低，保持独有的模拟音乐味道。

The design of digital notch filters can be achieved through three steps:firstly,the design of analog lowpass filter; secondly,it is analog lowpass to analog band stop filter conversion;at last,using the bilinear transformation make the analog notch filters change into digital notch filters.

研究一种在Matlab语言环境下设计IIR数字陷波滤波器的方法，在数字陷波滤波器设计过程中，先进行模拟低通滤波器的设计，然后进行模拟低通/模拟带阻滤波器转换，最后采用双线性变化法将模拟陷波滤波器转化成数字陷波滤波器。

At the same time, the content of experiment including composing of sequential logic circuit, controlling principle experiment, composing 8 bit computing unit and composite computing experiment, storing experiment, data bus experiment, float computing unit experiment, multi-pipelining processor experiment etc, all of these experiment engender a correlative system.

同时设计实验内容，包括时序电路的组成及控制原理实验、八位运算器的组成及复合运算实验、存储器实验、数据通路实验、浮点运算器实验、多流水线处理器实验等，这些实验形成一个相互关联的系统。

In the pre-experiment stage, we analyze the colors and shapes of 135 visual illusions by Kitaoka, a Japanese scholar. The result is referenced in the formal experiment. Formal experiment includes three sub-experiments: Experiment 1 is to discuss the effect of the displacement of disjunctive center on visual illusions' movement; Experiment 2 is to discuss the effect of image layout on visual illusions' movement; Experiment 3 is to discuss the effect of color configuration on visual illusions' movement. Post-experiment stage is a repeat of formal experiment to confirm the results.

前测实验是进行日本学者北冈明佳的135幅错视动态作品之造形与色彩的分析，并将分析结果作为正式实验样本之参考；正式实验分成三个实验进行探讨，实验一在探讨分割点中心的位移对於错视图形在视觉动态上的影响，实验二在探讨图形配置对於错视图形在视觉动态上的影响，实验三在探讨色彩配置对於错视图形在视觉动态上的影响；而后测实验则是将正式实验之实验结果进行再实验，以印证正式实验之结果。

Experiment Validation of Hydrodynamics Model of Drum Level The experiment rig was designed, and the experiment equipment was also set up. The experiment results show: As the validation of sloshing period under different levels, maximum error between the results of the experiment and the model is within±10%. As the experiment validation of model under in-and-output flux, changing trends of results of the model and the experiment are consistent, though there is some error in sloshing amplitude, the numeric error is within±20%.

2汽包水位水动力学模型的实验验证设计了实验台架，并建立了实验装置，实验结果表明：就不同水位情况下晃荡周期的验证而言，实验结果与模型计算结果之间的数值误差在±10%以内；就有进出口流量的情况下模型的实验验证而言，模型仿真结果的变化趋势与实验结果基本上是一致的，尽管晃荡幅度和相位上还是存在一定的误差，但其数值误差在±20%以内。

First, we investigate the methods of sepiolite s purification from ore , from which we get the incompact short fibrous sepiolite for the experiment ; the prime activatited term is also obtained through this experiment. We use activated sepiolite to process the absorption experiment on heavy meatal ion ( Ni2+, Cr6+, Pb2+, Cu2+, Cd2+), noble metal ion, dynamite cotnposton in water and industrial oil. we take Ni2+ for example to confirm the prime adsorbent term , from the experiment we get the adsorbent isotherm . Make the dynamic absorption experiment and regenerate experiment using sepiolite on the heavy metal(Ni2+) on the base of static absorption experiment.

我们首先研究了从矿石中提纯海泡石的方法，制得供实验用的松散短纤维状海泡石；通过实验确定了最佳活化条件；进行了活化后的海泡石对重金属离子Cr~(6+、Pb~(2+)、Cu~(2+)、Cd~(2+)、贵金属离子、水中炸药组份、工业油的吸附实验；以Ni~(2+)为例选择了最佳吸附条件；通过实验作出了以上各组分的吸附等温线；在静态吸附实验的基础上进行了海泡石对重金属Ni~(2+的动态吸附实验及再生实验。

But GST= 0.156, Nm=1. 588. As a result, the foundation of Youyongchi Avicennia marina population was the result of the migration of hypocotyles and human factors.

这项工作可以为海岸防护林中新引进种类的判定以及为研究种群建立者效应方法的确定提供科学依据。

The two-dimensional CDRC-ADI-FDTD update equations for collision unmagnetized plasma are induced. The unconditional stability of the CDRC-ADI-FDTD formulation for collision unmagnetized plasma is obtained by the examples.

推导了碰撞非磁化等离子体中的二维CDRC-ADI-FDTD迭代公式，并用算例验证了碰撞非磁化等离子体CDRC-ADI-FDTD算法也是无条件稳定的。