It's really a little annoying when books are used. Remember to keep this microphone there after I bought it and it was useless for a while. Once I suddenly thought about it, I found my microphone. But who once thought it was actually broken? What should I do? I can't do it, but I can only repair it. I can do it myself, hey. I thought it might be that the line was broken. At that time, there was no Multimeter in the house. It was too troublesome to buy it now. Just use the stupid method. After t
electrical load, so the signal conversion is fast and real device response parameter measurement can be performed.However, to increase the product output, it is best to aging as many devices as possible at the same time. To meet this requirement, multiple devices can be mounted on a large printed circuit board called an aging board. All the devices on the board are connected in parallel. The physical and Electrical Properties of a large aging board cannot be compared with that of a small test b
superimposed on a noise, it is very difficult to calculate the number of pulses. To solve this problem, Rohm used a special infrared removal measure, adding two layers of filter: One is an infrared filter, one is a color filter. Infrared filter can be the outside of the infrared light all filtered out, color filter can be visible in addition to the green light in all of the filter out, only let green light through, so that highlights the green light, to achieve high-precision detection.Another
ObjectiveIf we allow users to control the Web APP in a way that is similar to a desktop browser mouse gesture on the page, there must be a lot of clickable areas on this page, what if the user touches those clickable areas??Mobile devices such as smartphones and tablets typically have a capacitive touchscreen (capacitive touch-sensitive screen) to capture the interaction of the user's finger. With the devel
make communication more interesting. In addition, for female users to prepare a beauty alarm, life alarm clock and other exclusive functions.
Flower only Qingcheng L3 face with a 5.0-inch Super AMOLED display, resolution of 1280x720 pixel HD level, the display effect is more clear. The core is built with a quad core processor and a memory combination of 2GB RAM+16GB ROM to run the Android 4.4 system smoothly. The back of the fuselage also features a 13 million-pixel lens, which contains t
row to promote the transformer between the current limiting resistor in parallel a capacitor and a reverse diode. Usually this capacitor is organic electrolytic capacitor, the capacity from a few to hundreds of, with the increase in the use of time this capacitor will appear loss increases, capacity reduction (when its damage after the use of pointer multimeter is usually not measured out, the general use of digital multimeter capacitive block easier
The HART protocol is an open reference model based on ISO standards. This Protocol also belongs to the scope of communication protocols. Various communication applications and standards have been applied in many fields. HART, or Highway Addressable Remote Transducer, is short for Addressable Remote Sensor highways. It was first developed by Rosemount and supported by more than 80 famous instrumentation companies, it features no interference 4 ~ 20mA a
What is the role of HART communication protocol? Recently, many of my friends have been paying attention to this agreement. So here is a detailed introduction to the content of this agreement. This article describes the basic knowledge of this Protocol and analyzes some of its protocol commands and access processes.
HART (Highway Addressable Remote Transducer), an open communication protocol that can address Remote sensor express connect, it is a comm
. will summarize the HART protocol specifications involved in the software design based on the digestion and understanding of the HART protocol in the research work.
1. HART protocol Overview:
The HARTHighway Addressable Remote Transducer protocol is a Transitional Standard compatible with 4-20mA signal and digital communication technologies. Currently, it already has Rosemount, Smar, ABB, Fuji, Moore, E + H, Honeywell, fisher Controls, Arcom Control
transducers (FST)
A finite state transfer machine, Lucene 4 has an open source implementation and is heavily used
A brief analysis on the principle of 3 FSTLucene data structures that are used extensively since 4 are FST (finite state transducer). FST has two advantages:1) Small footprint. By reusing the word prefixes and suffixes in the dictionary, the storage space is compressed, and2) The query speed is fast. O (len (str)) query ti
The HART protocol may be unfamiliar to everyone. This Protocol is mostly used in industry. However, as the network continues to strengthen, there are also multiple combinations of protocols. Now we usually use sensors. In this case, communication protocols and computer protocols also have a combination.
1. HART (Highway Addressable Remote Transducer), an open communication protocol that can address Remote sensor express connect, it is a communication
The most widely used standard analog signal in industry is the use of 4~20ma DC current to transmit analog quantities.The reason for using the current signal is that it is not susceptible to interference. and the current source of infinite resistance, wire resistance series in the circuit does not affect the accuracy, on the ordinary twisted pair can be transmitted hundreds of meters. The upper limit of 20mA is due to explosion-proof requirements: 20mA of current through the spark energy is not
-independent Named Entity Recognition Method.
3. Overview of Information Extraction (click to download)Wang Jianhui automatically abstractsAlgorithmResearch on Improvement
4. Overview of Information Extraction (click to download)This is a report about information extraction, including muc and web extraction.
5. fastus: A Cascaded finite-state transducer for extracting information from natural-language text (click to download)This document introdu
measuring tube has the large penetration rate, usually may use in the small pouring pile, in the large-scale pouring pile application should be cautious, because the big diameter pile needs to pour the massive concrete, the cement's hydration heat is not easy to diverge: In view of plastic thermal expansion coefficient and concrete difference, After the solidification of the concrete tube due to the temperature drop of the radial and longitudinal contraction, it is possible to make it with the
measure process pressure and are relatively short in relative measurement time.The pressure measurement object is mainly liquid, gas, the measured variable is the corresponding medium pressure, and through the pressure measurement method indirectly obtained other parameters, such as liquid level and fluid flow. Its parameter expression is divided into absolute pressure, table pressure and differential pressure, wherein the pressure of the pipe is expressed as gauge pressure or absolute pressure
Dissolved oxygen electrode is based on the polarographic principle of the determination of dissolved in the liquid oxygen of the current-type electrode, the common dissolved oxygen analyzer used diaphragm electrode as a transducer, the dissolved oxygen concentration (actually oxygen pressure) converted into electrical signals, and then amplified, adjusted (including salinity, temperature compensation), by the analog-to-digital conversion display.1. Th
. The HAL implementor may need to being aware of these, but not the end user. See these Wikipedia articles:
GPIO
I²C
I²S
McASP
SLIMbus
Spi
Audio Signal PathThese terms is related to the signal path, which audio data follows from a application to the transducer, or VICE-VERSA.
Adc
Analog to Digital Converter, a module this converts an Analog signal (continuous in both time and amplitude) to a digital Signal
object lookup is actually an annotation, which is marked by gazetteer PR in Annie. gazetteer PR mainly performs a dictionary search operation. The lookup mark indicates that the word is found in the dictionary, its Attribute (feature) majortype is the category of the word defined in the dictionary. Another important object used by LHS is token, which is marked by the English tokeniser PR in Annie, indicating the text information of each word and the word represented by token. String.
RHS can al
Passive-passive element
├-Semicondudevice Semiconductor Device
Opamp
├ ── Voltage comparator Voltage Comparator
├ ── Voltage Regulator
├-PWM control: PWM Controller
Graphic-Graphical Modeling
├ ── Analog Model Synthesis Simulation System Model (from plotfile)
├ ── Electrical modeling Circuit System Model
├ ── Control Modeling Control Model (s domain, frequency domain)
├ ── Z Domain Modeling: Z domain model
Technical physical quantity
├ ── Interface, micro-controller data interface
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