Amplifier Bias Stability Design on Output Range Temp. Coefficient

2012 ◽  
Vol 433-440 ◽  
pp. 7368-7374
Author(s):  
Zeng Min Yuan ◽  
Xu Jin Yuan
Keyword(s):  
Temperature Coefficient ◽  
Voltage Divider ◽  
Design Methods ◽  
Bias Stability ◽  
The Relationship

The limitations of empiric design methods for amplifier biasing stability were pointed out. Critical bias and output range of voltage divider biasing amplifier were discussed. The relationship between bias temperature coefficient and β temperature coefficient was discussed as well. The ratio of bias temperature coefficient to β temperature coefficient is defined as effecting factor. Amplifier bias stability is designed based on output range temperature coefficient. The methods for designing base biasing resistance of voltage divider biasing amplifier on the basis of output range temperature coefficient and for analyzing biasing stability of this amplifier are introduced.

A Study on Temperature Properties of Different Types of Fixed Resistor

2017 ◽  
Vol 866 ◽  
pp. 392-397
Author(s):  
Nattapong Phanthuna ◽  
Chaiwat Jassadajin
Keyword(s):  
Low Power ◽  
Temperature Coefficient ◽  
Temperature Variation ◽  
Carbon Film ◽  
Experimental Result ◽  
Experimental Setup ◽  
Different Types ◽  
Wound Type ◽  
The Relationship ◽  
Resistance Value

This paper studies the relationship between the value of temperature variation and the resistance value of each type of general resistors as well as also determines the temperature coefficient value of each resistor type. All obtained results will be compared to build a guideline for selecting the resistor to apply in any applications accurately and properly. Each type of 1 k-ohm resistor that has different power is used to study its properties and is controlled its temperature variation to be in range of 20 to 30 degree Celsius. An experimental setup to control the temperature variation of the resistors in this paper is that the resistors are put into an oil bath controlled its temperature after that measuring the changed resistance value of the resistors following oil temperature in the bath. The experimental result demonstrates that the temperature variation affects to change the resistance value of Carbon Film type the most but affects to change the resistance value of Wire Wound type with low power the least.

scholarly journals Sustainability of Civil Structures through the Application of Smart Materials: A Review

Materials ◽  
2021 ◽  
Vol 14 (17) ◽  
pp. 4824
Author(s):  
Alireza Tabrizikahou ◽  
Mieczysław Kuczma ◽  
Piotr Nowotarski ◽  
Małgorzata Kwiatek ◽  
Ahad Javanmardi
Keyword(s):  
Shape Memory ◽  
Smart Materials ◽  
Significant Relationship ◽  
Piezoelectric Materials ◽  
Structural Characteristics ◽  
Design Methods ◽  
Seismic Events ◽  
Civil Structures ◽  
Comprehensive Review ◽  
The Relationship

Every year, structural flaws or breakdowns cause thousands of people to be harmed and cost billions of dollars owing to the limitations of design methods and materials to withstand extreme earthquakes. Since earthquakes have a significant effect on sustainability factors, there is a contradiction between these constraints and the growing need for more sustainable structures. There has been a significant attempt to circumvent these constraints by developing various techniques and materials. One of these viable possibilities is the application of smart structures and materials such as shape memory and piezoelectric materials. Many scholars have examined the use of these materials and their structural characteristics up to this point, but the relationship between sustainability considerations and the deployment of smart materials has received little attention. Therefore, through a review of previous experimental, numerical, and conceptual studies, this paper attempts to draw a more significant relationship between smart materials and structural sustainability. First, the significant impact of seismic events on structural sustainability and its major aspects are described. It is then followed by an overview of the fundamentals of smart material’s behaviour and properties. Finally, after a comprehensive review of the most recent applications of smart materials in structures, the influence of their deployment on sustainability issues is discussed. The findings of this study are intended to assist researchers in properly addressing sustainability considerations in any research and implementation of smart materials by establishing a more explicit relationship between these two concepts.

scholarly journals Designing dolls according to Youkai stories and Shinto beliefs in Eastern culture

2021 ◽  
Author(s):  
◽  
Yanxiao Liu
Keyword(s):  
Modern Society ◽  
Design Methods ◽  
Eastern Culture ◽  
Participant Engagement ◽  
True Value ◽  
Spirit World ◽  
New Vision ◽  
Meaningful Relationships ◽  
The Relationship

<p>Contrary to the contemporary views on the function and complex mastery skills of an object, the Eastern world puts more emphasis on the value of the object is in its inner spirit. This view is based on Shinto beliefs, where everything is spiritual and valuable. My project undertakes a case study of the relationship between humans and things. This is done by building on the uses of Shinto beliefs to design an object that initiates a narrative. More specifically dolls. Thus, invites a relationship and engages the belief that objects have souls.  The dolls which I designed are an intersection of the spirit world and reality. By providing a process that facilitates the traditional Youkai story base on Shinto beliefs and how it has developed in modern society. In promoting participant engagement through design methods and processes, this project discovered a new vision of forming meaningful relationships between humans and objects empowers the true value of an object. This project visualizes participant experiences created an exploration of a narrative that contains the spirit.</p>

scholarly journals Relationship between tolerance factor and temperature coefficient of permittivity of temperature-stable high permittivity BaTiO3–Bi(Me)O3 compounds

2016 ◽  
Vol 06 (01) ◽  
pp. 1650002 ◽  
Author(s):  
Natthaphon Raengthon ◽  
Connor McCue ◽  
David P. Cann
Keyword(s):  
Temperature Coefficient ◽  
Solid Solutions ◽  
Temperature Stability ◽  
Past Research ◽  
Tolerance Factor ◽  
Microwave Dielectrics ◽  
High Permittivity ◽  
The Relationship

The temperature coefficient of permittivity ([Formula: see text]) of BaTiO3–Bi(Me)O3 solid solutions were investigated. It was determined that as the tolerance factor was decreased with the addition of Bi(Me)O3, the [Formula: see text] shifted from large negative values to [Formula: see text] values approaching zero. It is proposed that the different bonding nature of the dopant cation affects the magnitude and temperature stability of the permittivity. This study suggests that the relationship between tolerance factor and [Formula: see text] can be used as a guide to design new dielectric compounds exhibiting temperature-stable high permittivity characteristics, which is similar to past research on perovskite and pyrochlore-based microwave dielectrics.

Study on Design Method of the Microstructure for Layered and Ring-Shaped Acoustic Cloaking Based on Bimode Metamaterial

2014 ◽  
Vol 684 ◽  
pp. 219-227
Author(s):  
Qian Jin Xiao ◽  
Xiang Dong Zhang ◽  
Jia Chang Qian ◽  
Hong Chen
Keyword(s):  
Theoretical Basis ◽  
Design Method ◽  
Design Methods ◽  
Design Parameters ◽  
Physical Parameters ◽  
Theoretical Design ◽  
Microstructure Model ◽  
Analytic Expression ◽  
Layered Design ◽  
The Relationship

The paper proposes a design method for the layered and ring-shaped acoustic cloaking based on BM. According to the theory of PM cloaking, physical parameters of the ring-shaped acoustic cloaking are given by theoretical design. Further, based on the features of microstructure of BM, the relationship between the parameters of each layer of microstructure of BM and the analytic expression of the physical parameters of acoustic cloaking made of BM is determined, and the design methods for microstructure of layered and ring-shaped acoustic cloaking are discussed, namely, radial equidistant layered design and radial non-equidistant layered design (i.e. equal sectorial angle layered design). At last, according to the radial non-equidistant layered design parameters of the ring-shaped acoustic cloaking, the microstructure model of the layered and ring-shaped acoustic cloaking is designed. The results of the study can serve as theoretical basis for actual production and application of acoustic cloaking.

scholarly journals subway advertising, service system, travel purpose, precise placement

2021 ◽  
Vol 2 (4) ◽  
Author(s):  
Yuxiao Tu ◽  
Zheng Li
Keyword(s):  
Social Influence ◽  
Service System ◽  
Economic Benefits ◽  
Design Methods ◽  
Interactive Design ◽  
Allocation Of Resources ◽  
Passenger Travel ◽  
Advertising Strategies ◽  
Optimized Allocation ◽  
The Relationship

From the perspective of the establishment of the subway media service system, the corresponding relationship between passenger travel purpose and advertising location is studied. The characteristics of convenient and efficient advertising in subway media to serve the crowd are used to form an optimized allocation of resources to maximize the effectiveness of advertising. Study the constituent factors of the subway media service system, and expound the relationship among the three areas of media, station cars, and crowds. Among them, it focuses on analyzing the occupations of passengers, economic income, viewing advertisements and travel purposes, etc., Using new interactive design methods to implement subway advertising strategies. Increasing the economic benefits and social influence of subway advertising.

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