itouch pulse

measurement distance is actually the time difference between the emission pulse and the echo pulse. Because the electromagnetic wave is transmitted at the speed of light, it can be converted into the precise distance of the target. The measurement target orientation is measured using the sharp azimuth beam of the antenna. Measuring the elevation angle is measured by a narrow elevation angle beam. The tar

masked image and the filling image of the contrast agent. (1) subtraction of time Time Subtraction is a common method of DSA. One or more frames of images are stored as mask images before the injected contrast agent enters the area of interest, and subtract from the image creation in chronological order. In this way, the same image part in the two frames is eliminated, and the high-density part formed when the contrast agent passes through the vascular is highlighted. This method is called time

The difference between TVs diodes and Zener diodesWhen the TVs tube exceeds its withstand voltage, it will momentarily short-circuit the reaction speed at the NS level,And the regulator is the regulator, more than its voltage regulator value, as long as the power does not exceed its tolerance value, it will be stable in its regulated value range.TVS is a transient suppression diode that is mainly used to suppress instantaneous voltage spikes and reduce the loss of the component by the spike volt

Excerpt from: http://group.chinaaet.com/273/4100029440VGA interface timing, field synchronization signal VSync at the beginning of each frame (that is, send a full screen image) to produce a fixed-width high pulse, the line synchronization signal HSync at the beginning of each line to produce a fixed-width high pulse, color data at some fixed row and column interchange valid.As mentioned earlier, we typical

Traditional communication systems are usually fixed-frequency communication systems. The information to be transmitted uses a fixed bandwidth, and the signal is modulated to a fixed frequency band and then transmitted over a channel (wireless or wired. Any other signal in this channel will interfere with useful signals. Therefore, a communication system with such characteristics is called a fixed-frequency communication system with an exclusive Channel. In contrast, the wireless signals sent by

1. Ask modulation : "Amplitude shift keying" is also known as "amplitude keying", or "open key Control" (on-off keying), so it is also recorded as Ook signal. Ask is a relatively simple method of modulation. The amplitude shift keying (ASK) is equivalent to the amplitude modulation in the analog signal, except that the binary digital is multiplied by the carrier signal. Amplitude shift is the frequency, phase as a constant, and the amplitude as a variable, the information bit is transmitted by t

converted value type is an interface type, the packing operation will occur, resulting in performance loss. 5. implementation of explicit interfaces (EIMI: explicit interface method implementation) Public interface ITouch {void Too ();} public class Dosome: ITouch {public void Too () {Console. writeLine ("public Too");} void ITouch. too () // explicit interface

along the radar, either toward the radar or from the radar. Note: ① radial velocity is always less than or equal to the actual target speed; ② measured by wsr-88d is just the movement of the target toward or out of the radar. ③ when the target motion is perpendicular to the radar radial or stationary, the radial velocity is zero. The relationship between the actual velocity of the target and the radial velocity described by wsr-88d can be described as a radial velocity equation by mathemat

/differential mode protection, RF coupling/IC drive receive protection, motor electromagnetic interference suppression, audio/video input, sensor/transmission, Industrial circuit, relay, contactor noise suppression and other fields. The following three major characteristics: 1, the TVs diode is added to the signal and the power line, can prevent microprocessor or microcontroller due to instantaneous pulse, such as electrostatic discharge effect, the s

basically consistent with the influence of the coherent bandwidth. How coherent bandwidth is obtained. As can be seen from our experiments, the receiving signal is the superposition of 2 radio waves with a frequency of F, the phase difference between the 2 waves is: From this formula, we can see that for a fixed r, if f changes, then the synthesized signal from the peak to reach the trough, and exactly is the reflection diameter and the direct path of the propagation delay difference. If the f

IOS devices are developed by size into phone/touch and pad, each with the following resolution:1 Size and resolutionIphone/ipod Touch Device Name Resolution Screen type IPhone 1/3g/3gs,ITouch 1/2/3 320x480 Normal screen IPhone 4/4s,ITouch 4 640x960 3:2 Retina Screen IPhone 5/5s,IT