The perfect choice of one-stop service for diversification of architecture.

The Supply of Medium and High-end Series Rtx30 Series New Products Is Currently Out of Stock

On November 18, bobantang juxunmen released the ranking list of shipments of various brands of graphics cards in mainland China in October 2020.

According to the data, the total shipment data of all brand graphics card sell in in China in October 2020 decreased by about 6% month on month compared with September, and increased by about 13% year-on-year compared with October last year.

In October, the in shipment of various brands of graphics cards was not very poor, because there was one less National Day holiday, but at the same time, there was another double 11 online preparation period in advance. The medium and high-end series continued to be in short supply, the supply was less than the demand, and the proportion of low-end series increased.

In October 2020, the main performances of various brands of graphics cards are as follows:

Qicaihong still ranks first, ASUS surpasses Yingchi to rank second, MSI's shipment growth is large, ranking fourth, and the ranking of other brands has not changed much. For details, please refer to the data chart directly.

The Supply of Medium and High-end Series Rtx30 Series New Products Is Currently Out of Stock 1

get in touch with us
مقالات مقترحة
Problems of Phased Array Ground Penetrating Radar Detection System
Although GPR has been widely used in hydrology, engineering, environment and other fields, many basic theoretical and technical problems have not been fundamentally solved, so the real advantages of GPR have not been brought into full play.The main problems existing in GPR technology include:1) The detection depth is shallow, and the contradiction between detection depth and resolution cannot be overcome. Increasing detection depth means sacrificing detection resolution;2) Multiple spread and other clutter jamming are serious, and there has been no good elimination method, which exists in radars at home and abroad;3) The influence of medium unevenness is great and can not be eliminated, resulting in difficulty in obtaining necessary velocity data;4) The data collection method of single sending and single receiving can provide limited information for post-processing and interpretation.The above problems are fatal defects for GPR. Although many geophysicists, electromagnetic experts and geophysical workers have done a lot of research and improvement on radar antenna design, signal processing and underground target imaging, these works are only partial modifications to the existing GPR system. In order to develop GPR technology, we must update our ideas and solve the problems from the fundamental principle.In view of this situation, experts proposed to develop a new GPR system - phased array GPR detection system in 1999.The basic research idea is to replace the current monopole radar antenna with the phased array radar antenna by using the relatively mature military phased array radar technology. Its purpose is to gather the electromagnetic wave into a narrow beam to transmit underground (or detection object) through the phased array technology, and receive the radar echo signal reflected by the target by using the multi-channel acquisition technology, The advanced data processing is carried out, and finally the three-dimensional image of the internal structure of the detection object is given.Development prospect of ground penetrating radar technologyIt is worth noting that at present, similar products have appeared in the market, such as RIS antenna array series of a company, but these products simply combine multiple monopole antennas into array antennas, which is essentially different from the idea of phased array ground penetrating radar.Because the phased array radar converges the electromagnetic wave into a narrow beam by controlling the phase delay of each channel, the energy is concentrated and the wave front diffusion is small. Therefore, the detection depth of the phased array radar is much larger under the condition of the same frequency and transmission power; On the contrary, under the same detection depth, phased array radar can improve the transmission power, so its resolution is much higher than the existing radar. In addition, since the spherical wave transmission is changed to beam transmission, the influence of medium heterogeneity is much smaller.Secondly, the phased array radar works in a continuous scanning mode and can scan in multiple directions. Therefore, the amount of information is much larger than that of the existing ground penetrating radar. For some special detection work, such as the quality detection of embankment cut-off wall, its role is unmatched by the existing ground penetrating radar (monopole antenna radar can not detect the joints, forks and other defects of embankment cut-off wall at all).Because phased array radar is a multi-channel received signal, multi-channel superposition can be carried out, just like the multiple coverage technology of reflection seismic exploration. Therefore, multiple interference can be greatly eliminated, which is difficult for existing radars. The antenna of high frequency (600mhz-1ghz) phased array ground penetrating radar can be made smaller, and its advantages are unmatched by the existing ground penetrating radar in shallow detection.At present, the system prototype has been completed. The carrier free pulse working system with center frequency of 900MHz is adopted, and the transmitting and receiving antennas are separated. 16 (4 × 4) Transmit channel forming, beam aggregation and scanning 16 (4) × 4) The channel receives the echo, and the optional scanning angles are - 36 °, - 24 °, - 12 °, 0 °, 12 °, 24 ° and 36 °.The software part of the system has rich data processing functions. The main conventional processing includes filtering, gain adjustment, static and dynamic correction, deconvolution, complex signal analysis, time-frequency analysis, etc., and multi-channel data processing, such as velocity analysis, superposition technology, coherence analysis technology, array signal processing, etc. And weak signal extraction, target automatic recognition and inversion interpretation under various clutter interference. A large number of field experiments on concrete detection in Yichang Three Gorges dam are carried out. The experimental results show that the spotlight scanning function of phased array radar has been realized, the penetration depth is greater than 1.5m and the resolution is higher than that of ordinary radar.Editing: hfy
Suggestions for Journaling, Bullet Notes, Activity, Wiki Like Application
How Many NCAA Football Bowls Are There?
What Is the Name of a Horror Movie with an Eye Falling in a Cocktail Glass?
Automotive Backup Camera Systems, Backup Hub
Blockchain Technology Explained: Powering Bitcoin
PLEASE HELP ME CHOOSE a VIDEO CAMERA!?
The National Key R & D Plan Launched the Key Project of "key Technologies and Demonstration of Inter
Alibaba Goes to War! Smart Home Battlefield Adds Another Giant
Looking for Software to Monitor Installations
عمليات البحث ذات الصلة
Problems of Phased Array Ground Penetrating Radar Detection System
Suggestions for Journaling, Bullet Notes, Activity, Wiki Like Application
How Many NCAA Football Bowls Are There?
What Is the Name of a Horror Movie with an Eye Falling in a Cocktail Glass?
Automotive Backup Camera Systems, Backup Hub
Blockchain Technology Explained: Powering Bitcoin
PLEASE HELP ME CHOOSE a VIDEO CAMERA!?
The National Key R & D Plan Launched the Key Project of "key Technologies and Demonstration of Inter
Alibaba Goes to War! Smart Home Battlefield Adds Another Giant
Guangzhou
House Empire Construction&Furnishing Co.,Ltd
لايوجد بيانات
Sign Up For The Newsletterus
Copyright © 2018 Guangzhou House Empire Construction&Furnishing Co.,Ltd. | All Rights Reserved Design by www.digahousing.com |Sitemap