英语作文数据分析报告范文.docx

1、英语作文数据分析报告范文英语作文数据分析报告范文1. 写篇英语作文 调查报告 A Report on Childrens Gratitude to Their Parents Childrens lives are given by their parents and originally,children should be grateful to them.Hower,not all the children can do so.A report made recently suggests that one-fourth of the people think that to raise

2、 children is the duty of their parents and so children neednt express any gratitude to them.Another one-fourth of the people suppose that there is a big gap between them and their parents.They dont know how to communicate with their parents,let alone to say gratitude.Others say that they hate to exp

3、ress any gratitude.It is boring. To respect parents and express our gratitude to them is a good tradition of Chinese people.As far as I am concerned,to we should show our respect and gratitude to our parents.They give birth to us,and undoubtedly we are supposed to be grateful to them in return. 2. 有

4、关数据采集的英文文章5000字左右 Data acquisition is the sampling of the real world to generate data that can be manipulated by a computer.Sometimes abbreviated DAQ or DAS,data acquisition typically involves acquisition of signals and waveforms and processing the signals to obtain desired information.The component

5、s of data acquisition systems include appropriate sensors that convert any measurement parameter to an electrical signal,then conditioning the electrical signal which can then be acquired by data acquisition hardware.Acquired data are displayed,analyzed,and stored on a computer,either using vendor s

6、upplied software,or custom displays and control can be developed using various general purpose programming languages such as BASIC,C,Fortran,Java,Lisp,Pascal.Specialized programming languages used for data acquisition include EPICS,used to build large scale data acquisition systems,LabVIEW,which off

7、ers a graphical programming environment optimized for data acquisition,and MATLAB which provides a programming language,and also built-in graphical tools and libraries for data acquisition and analysis.How data is acquired Source Data acquisition begins with the physical phenomenon or physical prope

8、rty of an object (under investigation) to be measured.This physical property or phenomenon could be the temperature or temperature change of a room,the intensity or intensity change of a light source,the pressure inside a chamber,the force applied to an object,or many other things.An effective data

9、acquisition system can measure all of these different properties or phenomena.A transducer is a device that converts a physical property or phenomenon into a corresponding measurable electrical signal,such as voltage,current,change in resistance or capacitor values,etc.The ability of a data acquisit

10、ion system to measure different phenomena depends on the transducers to convert the physical phenomena into signals measurable by the data acquisition hardware.Transducers are synonymous with sensors in DAQ systems.There are specific transducers for many different applications,such as measuring temp

11、erature,pressure,or fluid flow.DAQ also deploy various signal conditioning techniques to adequately modify various different electrical signals into voltage that can then be digitized using ADCs.Signals Signals may be digital (also called logic signals sometimes) or analog depending on the transduce

12、r used.Signal conditioning may be necessary if the signal from the transducer is not suitable for the DAQ hardware to be used.The signal may be amplified or deamplified,or may require filtering,or a lock-in amplifier is included to perform demodulation.Various other examples of signal conditioning m

13、ight be bridge completion,providing current or voltage excitation to the sensor,isolation,linearization,etc.Analog signals tolerate almost no cross talk and so are converted to digital data,before coming close to a PC or before traveling along long cables.For analog data to have a high signal to noi

14、se ratio,the signal needs to be very high,and sending +-10 Volts along a fast signal path with a 50 Ohm termination requires powerful drivers.With a slightly mismatched or no termination at all,the voltage along the cable rings multiple time until it is settled in the needed precision.Digital data c

15、an have +-0.5 Volt.The same is true for DACs.Also digital data can be sent over glass fiber for high voltage isolation or by means of Manchester encoding or similar through RF-couplers,which prevent net hum.Also as of 2007 16bit ADCs cost only 20 $ or DAQ hardware DAQ hardware is what usually interf

16、aces between the signal and a PC.It could be in the form of modules that can be connected to the computers ports (parallel,serial,USB,etc。 ) or cards connected to slots (PCI,ISA,PCI-E,etc。) in the mother board.Usually the space on the back of a PCI card is too small for all the connections needed,so an external breakout box is required.The cable between this Box and the PC is expensive due to the many wires and the required shielding and because it is exotic.DAQ-cards o