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Channels can be compared to RJ45 network cables, a total of 11 available channels. Considering that there are overlapping regions between the adjacent two wireless APs, in order to ensure that the signal channel used in this part of the region can not be covered by each other, the wireless AP with the specific signal covering each other must use different channels, otherwise it is easy to cause the signal of each wireless AP to interfere with each other, thus causing the overall performance of t

that the data rate is higher, the security is better and the quality of service is more and more guaranteed. And from the wireless LAN standards of the supporters and the geographical scope of use, wireless LAN can be said to have three camps: IEEE 802.11 series of standards, European hiperlan1/hiperlan2 and Japan's MMAC series standards. 802.11 series Standard In the 802.11 series, there are 4 standards involving the physical layer: 802.11, 802.11b, 802.11a, 802.11g. According to different

usedDP ( Data Segmentation) Mechanism, then A piece is a nalu, A nalu is also a piece. Otherwise, A piece consists of three nalu(That is, the nal_unit_type value in the standard "Table 7-1" is 2, 3, and 4 ThreeNALU is a piece ); 2 encoding strip data split Block A slice_data_partition_a_layer_rbsp ()3 encoding strip data split block bslice_data_partition_ B _layer_rbsp ()4. Encoding band data split block cslice_data_partition_c_layer_rbsp ()(5) The r

coverage problem is first considered in network planning. However, with the continuous expansion and coverage of the network, we found that the capacity problem has become a bottleneck restricting the further development of the network. Due to frequency band restrictions, the GSM network used in China is becoming more and more obvious after so many years of rapid resizing. For Network resizing, we can usually use the following methods: cell splitting

surface along the north and south poles of the bus is cut and flattened, that is, a Gaussian grid projection plane. After Gaussian kerlenge projection, except the central meridian line and the equator are straight lines, other meridian lines are symmetric in the central meridian line curve. Gaussian-gram projection has no angle deformation, and the deformation on the length and area is also small. The central meridian line has no deformation, and the deformation increases gradually from the cen

report makes us confused. If we want to conduct wireless network activities in the future, we can only turn off the lights to watch videos, play games, and browse webpages? Is it because of electric lights that make our network unstable and reduce the transmission rate of wireless networks? Does the electric light affect the speed of the network? After carefully reading this report, we can find that the lights in this Article refer to halogen lamps and light boxes. Because their transformer, r

Previously I wrote an article titled gdal rasterio instructions. Before entering the topic, we should first understand the basic storage method of the first image. The so-called image first uses a single-band image to describe that the image is a large two-dimensional matrix. The width and height of this matrix is the width and height of the image, the element value in the matrix is the image metadata value (for more information, for DEM data, many pe

Gdal is a very good GIS data Operation Library, recently in and intern introduction Gdal simple use, write down the recordThis article records the raster data, the code environment is C #In Gdal, the raster data is roughly a raster data file (. tif/geotiff format) in a dataset, and the various information in this raster is included as attributes in the dataset's object.Basically, a raster is stored in the Gdal data model based on the band, typically a

inaccurate. Port and jasperstudio are actually auxiliary visual design tools of jasper. You can design jasper reports without using them and write more XML white data. Before June 5.5, this tool was called ireport. After June 5.5, with the birth of the third brother jasperstudio, ireport was completely replaced. In fact, these two tools are basically the same. Specific workflow: ① First, Jasper will obtain the xml file of the format information to be output, and then compile and translate it fr

1, Beam IntroductionIn order to serialize HDF files in Hadoop, after a variety of searches, inadvertently discovered a powerful Java open source software, it is beam.For researchers engaged in remote sensing, it can be used as a powerful open source remote sensing processing software by installing beam. Although not envi so easy to use, but also perfunctory passable. Install beam at least, without authorization files to crack ~For remote sensing software developers, Beam's library is a great too

At present, many new wireless routers have dual-frequency to do the selling point, the popular Route 2, millet routers are supported dual-frequency, where the dual-frequency refers to the 2.4GHz and 5GHz, then 2.4GHz and 5GHz routers What is the difference? What are the advantages and disadvantages of 2.4GHz and 5GHz routers? 　　2.4GHz and 5GHz are two bands without affecting transmission speed. Many netizens may ask the wireless router in the 5GHz is faster than 2.4GHz? Just like m

Here is the Bean Assembly collection, spring's supported collection elements , and its basic use as a collection of Java, so if the collection of Java is not too familiar with the first to find a post a good study, the time relationship here will not say. ~~List of examplespublicinterface Instrument { void play();}public class guitar implements instrument { @Override public void play () {//TODO auto-generate D Method Stub System.out.println ( "Dang Dang Dang" ); }}public clas

transmission speed and MAC layer efficiency are improved, so the network capacity will also increase; however, only by correctly planning the distribution of network customers can the increased capacity be fully utilized. Background The Background Environment for deploying a wireless LAN is very important. Neighboring access points or other wireless transmitters that use the same frequency band may interfere with the network. This type of wireless co

In February 11, 2013, NASA successfully launched the Landsat 8 satellite, re-injecting fresh blood into the Landsat program, which has taken over the past 40 years. Landsat-8 carries two major loads: Oli and TIRS. Among them, Oli (full name: operational land imager, land imager) was developed by Bauer Aerospace Technology Corporation in karaddo; TIRS (full name: thermal infrared sensor, thermal infrared sensor ), developed by NASA's godad Space Flight Center. Figure: Oli land imager Structure

Introduction to Western wind instruments This article was first published on the Tsinghua BBS site and some other domestic BBS sites about a year ago. At that time, my signature was Andante. thank you for the excellent performance of the Tsinghua BBS classical music edition. This article is included in the essence area. for various reasons, the original text is no longer in the BBS classical music edition, and my original account has been canceled. this article will be revised again, enrich par

refractive index distribution of optical fiber is designed to produce a waveguide dispersion which is comparable to material dispersion, so that the dispersion of the material and the dispersion of the waveguide are added, and the 0 dispersion wavelength of the DSF is moved to the vicinity of 1550nm. The 1550nm wavelength is the most widely used wavelength in the current communication network. In the submarine optical cable transmission system, the dispersion management is composed of two kinds

The focus and specific usage of each project on GitHub, including features, UI, database, automated testing, programming tools, and more, read it and call yourself "proficient in iOS development"? The Https://github.com/syedhali/EZAudio is based on core audio and facilitates real-time, low-latency audio processing and visualization of iOS and OSX audio visualization frameworks. Https://github.com/bang590/JSPatch Jspatch uses objective-c run-time bridging objective-c and JavaScript. You can

The Https://github.com/syedhali/EZAudio is based on core audio and facilitates real-time, low-latency audio processing and visualization of iOS and OSX audio visualization frameworks.The Https://github.com/bang590/JSPatchJSPatch uses objective-c run-time bridging objective-c and JavaScript. You can include only one of these libraries, and you can call any of the classes and methods in Objective-c through JavaScript. Jspatch is typically used to dynamically fix iOS apps.Https://github.com/

hot data analysts are doing the job of gathering information, structuring it, and finally, the magic power of big data we can see. But the problem is that the amount of data that is being processed is too large. According to interviews and expert estimates, the data analyst's 50%~80% time is spent on processing data.Monica Rogati, who is responsible for data work at the Smart bracelet company Jawbone, says: Processing data is a huge part of

intelligent machines and developed more advanced animated avatars, and through HealthKit,Fitbit, Jawbone, and Moves to get the activity data,as shown in 1.2 . Figure 1.2 Wokamon3.On Campusthe University of North Carolina has started using the student health application to cope with the high-birth-weight surge ( Freshman) problem. The app can create recipes for students and sync on HealthKit . It can also display menus in each area of the university's