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Guide to Buy Other Audio & Video Equipments in Digah House Company

Guide to Buy Other Audio & Video Equipments in Digah House Company

2021-11-21
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The Development of Intelligent Security Is Accelerating, and the Scale of Video Surveillance Market
The Development of Intelligent Security Is Accelerating, and the Scale of Video Surveillance Market
Intelligent security is a three-dimensional defense system composed of various security detectors in the security system, such as smoke detection, mobile detection, glass breakage detection, door magnetic access control, visual intercom and video monitoring, which intelligently applies and processes the video, picture, sound, signal and other information obtained in the security system, Use intelligent technology to automatically analyze and identify the information, and finally achieve the purpose of pre judgment and early warning, safety and protection in advance.In recent years, the total output value of global security equipment accounts for about 25% of the whole security industry. Among them, video security accounts for 54%, access control system accounts for 22.5%, and anti-theft alarm system accounts for 23.5%. It is estimated that by 2017, the security market is expected to reach US $170 billion. According to the data released by IHS, a market research organization, in the global security market, the growth rate in the field of entrance and exit control reached 8%, the growth rate in the field of anti-theft alarm was 5.1%, the growth rate in the field of explosion-proof security inspection was 5.7%, and the growth rate of other physical security products reached 7%. At present, the fastest growth rate is video monitoring equipment, with an average annual growth rate of 12.4%. It is estimated that by 2018, the video surveillance market will reach US $26 billion.The United States and the United Kingdom have the highest camera coverage in the world. The data show that the United States is equipped with about 96 surveillance cameras per 1000 people, and the United Kingdom is equipped with about 75 surveillance cameras per 1000 people. In cities with high camera density in China, the number of cameras per 1000 people is less than 40. In addition, at present, the global penetration rate of civil security equipment is about 10%, the penetration rate of civil security equipment in the United States has reached 50%, while China's civil security equipment accounts for about 11% of the overall security market, which has great room for improvement in the future.Data show that last year, the total output value of China's security equipment industry reached 486 billion yuan, and the growth rate of the security industry remained at about 13%. In China's security equipment market, the market share of video surveillance products has reached more than 50%, becoming the core product of building security equipment system. The annual compound growth rate of video surveillance products has exceeded 12%.From the perspective of industrial chain, China's security equipment industry is composed of upstream parts suppliers, midstream software and hardware suppliers, downstream dealers, integrators, general contractors and top-level designers. Among them, the upstream suppliers are mainly electronic components and semiconductor chip suppliers; The midstream is mainly equipment manufacturing; Downstream are designers and general contractors, mainly composed of telecom operators or system integrators.With the rapid development of Internet of things, artificial intelligence, cloud computing, big data and other technologies, intelligence will become the mainstream configuration of security products. In the future, security applications will be extended to government, public utilities, education, community and financial industry, with broad development space.
Fingerprint Humidity Control Mechanism Is Conducive to the Development of Better Robots and Other Eq
Fingerprint Humidity Control Mechanism Is Conducive to the Development of Better Robots and Other Eq
Primates, including humans, monkeys and apes, have evolved epidermal ridges on their hands and feet, and the density of sweat glands here is higher than elsewhere in the body. This allows them to accurately adjust skin moisture and provide greater grip when manipulating objects. A new study conducted by the University of Birmingham in the UK in cooperation with researchers from research institutions such as Seoul National University and Yonsei University in South Korea shows that the water regulation mechanism of fingerprint can not only help people better grasp objects, but also help scientists develop better prosthetics, robot human equipment and virtual reality environment. Relevant research results were published in the Journal of the National Academy of Sciences.Fingerprints help to increase the friction when contacting with smooth surfaces and enhance the grip and tactile sensitivity to rough surfaces. The moisture regulation mechanism of fingerprint ensures the optimal hydration state of skin cuticle, so as to maximize friction."Primates have evolved epidermal ridges on their hands and feet. Fingerprint ridges are very important for grasping and accurately manipulating solid objects. They can adjust the water released from external sources or sweat glands, so as to maximize friction, avoid 'catastrophic' sliding, and enable us to hold smartphones." the co-author of the research paper Mike Adams, a professor of product engineering and manufacturing at the University of Birmingham, said that understanding the impact of finger fingerprint ridge friction will help researchers develop more realistic tactile sensors. For example, sensors applied to robots and prosthetics, and tactile feedback systems in touch screens and virtual reality environments.Ultrasonic lubrication is usually used for touch screen displays that provide sensory "tactile" feedback, but compared with wet fingerprint ridges, the effect of ultrasonic lubrication will be reduced when the user is in a dry environment. In addition, the identification of fine structured surfaces such as fabrics by touch depends on the induction of lateral vibration, so the lack of sliding friction will hinder the identification of what is actually in contact.Fingerprint is unique to primates and koalas. It seems to have a dual role. It not only promotes the evaporation of excess water, but also provides a water reservoir at the bottom to maximize grip strength.The researchers found that when the finger contacts the impermeable surface, the sweat in the pores of the fingerprint ridge will make the skin softer, which significantly increases the friction. The increased compliance of ridge sweat will eventually lead to pore blockage, prevent the release of too much water, and reduce the ability to grasp objects.Using high-tech laser imaging technology, scientists found that water regulation consists of two parts, namely, the above sweat hole blocking process and the accelerated evaporation of external excess water caused by the change of specific cross-sectional shape of epidermal ridge when contacting objects.Whether the finger belly is wet or dry at first, the above two processes keep the fingerprint ridge at the best humidity, so as to maximize the friction."This dual mechanism of water regulation provides primates with evolutionary advantages in dry and wet environments, giving them the ability to manipulate and move objects, which other animals, such as bears and large cats, do not have," Adams added.
Wireless Video Communication Scheme Based on MIMO Technology and H.264 Code
Wireless Video Communication Scheme Based on MIMO Technology and H.264 Code
Aiming at the problem of low reconstructed image quality in traditional video transmission, a new scheme of H.264 bitstream transmission is proposed. At the source end, according to the importance difference of H.264 code stream, it is divided into two parts. MIMO channel is used to transmit video signal. Under the condition of keeping the total transmission power constant, the transmission power is dynamically distributed on two antennas. Simulation results show that the proposed scheme effectively improves the reconstructed image quality at the receiver under the same channel conditions.0 IntroductionIn recent years, with the development and application of high-speed broadband wireless technology, wireless video communication is becoming a field of widespread concern. How to significantly improve the spectrum efficiency in wireless communication system to meet the increasing demand of communication capacity has become a widespread concern and urgent problem to be solved all over the world. Multiple input multiple output (MIMO) technology can effectively alleviate the above contradiction by increasing the number of antennas at the transmitter and receiver. The system uses multiple antenna arrays at the transmitter and receiver to obtain spatial multiplexing and diversity gain, and space-time code (STC) fully exploits the MIMO system capacity, which is an effective means to improve the bit error performance of the whole system. On the other hand, as a new generation of video compression coding standard, h.264/avc has high coding efficiency and good network performanceComplex affinity has been widely valued by scholars at home and abroad. The combination of MIMO technology and h.264/avc will greatly improve the reliability of wireless video communication.1. Bitstream segmentation of H.264H. The code stream of 264 is encapsulated by network abstraction layer (NAL unit). Each nal unit has a specific data type. It contains a byte nal unit header and an original byte sequence load. The importance of the current nal unit is indicated by the NRI in the nal unit header information. The higher its value, the more important the nal unit is. In the semantics of H.264 nal layer, nal is used_ ref_ IDC to indicate the priority of the current nal.Based on this idea, for the H.264 code stream in annexb data format, the nal of I frame or IDR frame (immediate refresh frame), SPS (sequence parameter set) and PPS (image parameter set) in the sequence_ ref_ The IDE value of 3 indicates that the nal unit in which it is located has a high importance level. Once this kind of data is lost, it will have a fatal impact on video reconstruction. Because I frame is the intra coding mode and it is used as the reference frame of P frame, only its accurate transmission can ensure the complete decoding of the image. SPS and PPS are necessary parameters for decoding, and its loss is bound to have a fatal impact on the image. Based on the above considerations, the bitstream segmentation method in this paper is as follows: the data of I frame (or IDR frame), SPS and PPS which play an important role in video image reconstruction are regarded as a kind of data, and the high-level protection is adopted for this kind of data; The rest is class II data, which adopts low-level protection, and on this basis, unequal error protection scheme is designed to improve the quality of reconstructed image.2 space time block coding (STBC)Space-time code is a high reliability channel coding proposed to realize the channel capacity of MIMO system. According to the channel characteristics, it effectively integrates the technologies of transmit diversity, receive diversity, error correction coding and modulation. It can achieve high spectral efficiency communication with low transmission power and approach the performance of MIMO channel capacity. Compared with the system without space-time coding, space-time code can obtain better anti error performance under the same spectrum resources.Space-time coding system not only provides full diversity gain, but also provides coding gain, and has linear detection complexity. For simplicity and generality, this paper adopts a STBC system with two transmitters and one receiver. This system is also the most classical space-time code at present. It not only provides full diversity gain, but also provides coding gain, and has linear detection complexity. This scheme is also the most classical space-time code, and its coding structure isThe received signal corresponding to two consecutive time slots on the receiving antenna can be expressed asWhere H1 and H2 are the channel fading coefficients from the two transmitting antennas to the receiving antenna respectively, W1 and W2 are the complex Gaussian white noise added to the receiving antenna, the mean value is 0 and the variance is N0. The detection can be completed by the maximum likelihood decoding criterion.3 H.264 space-time coding scheme based on power allocation3.1 power allocation strategyAssuming that the total transmission power of the system is p, there are n transmission antennas, and the transmission power on each antenna is P0, so there isIn order to realize unequal error protection, for the STBC system with two transmitters and one receiver, it is assumed that antenna 1 transmits a high priority code stream and allocates a large transmission power to it, and the allocation coefficient is K1, (K1 > 1); Antenna 2 transmits low priority code stream and allocates small transmission power to it. Set the allocation coefficient as K2, (K2
Fast facts about Customized Different Designs of Aluminium Frame Windows
Fast facts about Customized Different Designs of Aluminium Frame Windows
With reasonable price and premium quality, Customized Different Designs of Aluminium Frame Windows enjoys popularity globally. Unequaled Solid wood is the main material for producing Customized Different Designs of Aluminium Frame Windows.It comes with various structures.The measured data indicates that Customized Different Designs of Aluminium Frame Windows meets the market requirements.The application of high-end sliders with soft closing system perfects the function of Customized Different Designs of Aluminium Frame Windows.On the strength of good sealing performance,it embodies characteristics such as sound insulation.It finds application in various fields such as villas, residential, offices, hotels.It has obtained ISO.This product's warranty period is year(s) from the purchase date.Customization service is offered to meet different demands.For more detailed information on Customized Different Designs of Aluminium Frame Windows, you may find it at http://www.digahousing.com/aluminium-window-seriesEmpery has become a recognized leader in the kitchen cabinets,wardrobes,door and windows manufacturing industry industry with its high-quality product and excellent service.Empery has engaged itself in the kitchen cabinets,wardrobes,door and windows manufacturing industry industry for 15 years.So far our company has been a popular choice in worldwide.We can supply a variety of products, including Aluminium Window Series.Kitchen cabinets are designed with beautiful appearance and various functions. OEM and ODM service can be provided by Digah. UV cabinet door panel is smooth and wear-resistant.Empery always upholds the 'Listen and learn from other people.' business idea.If you are interested in us, you may click http://www.digahousing.com/
Non-canonical PoS and SoP Forms
Non-canonical PoS and SoP Forms
Non-canonical PoS and SoP formsIt is often the case that the canonical minterm form can be simplified to an equivalent SoP form. This simplified form would still consist of a sum of product terms. However, in the simplified form, it is possible to have fewer product terms and/or product terms that contain fewer variables. For example, the following 3-variable function: has the canonical minterm representation: f = a ′ b c a b c displaystyle f=a'bcabc , but it has an equivalent simplified form: f = b c displaystyle f=bc . In this trivial example, it is obvious that b c = a ′ b c a b c displaystyle bc=a'bcabc , but the simplified form has both fewer product terms, and the term has fewer variables. The most simplified SoP representation of a function is referred to as a minimal SoP form. In a similar manner, a canonical maxterm form can have a simplified PoS form. While this example was easily simplified by applying normal algebraic methods [ f = ( a ′ a ) b c displaystyle f=(a'a)bc ], in less obvious cases a convenient method for finding the minimal PoS/SoP form of a function with up to four variables is using a Karnaugh map. The minimal PoS and SoP forms are very important for finding optimal implementations of boolean functions and minimizing logic circuits.— — — — — —Approved forms of identificationSection 1 of Act 23 specifies that only the following forms of photo identification are acceptable: A Wisconsin driver's license An nondriver identification card issued by the Wisconsin Department of Transportation Photo identification issued by the United States military A United States passport or passport card A United States naturalization certificate, issued not more than two years prior to the election An unexpired receipt for a Wisconsin driver's license or nondriver identification card (this is given at the Department of Motor Vehicles, as Wisconsin's licenses and identification cards are printed and mailed from an outstate provider in California) A tribal identification card issued by a recognized Wisconsin Native American tribe An unexpired identification card issued by an accredited Wisconsin college or university with a date of issuance, a date of expiration not later than two years after the date of issuance, the voter's signature, and further provided that the student also present proof of enrollment in said college or university— — — — — —Related art formsMany tribes throughout North America, besides those on the Plains, also painted hides, following different aesthetic traditions. Subarctic tribes are known for their painted caribou hides. On the Plains, when buffalo herds were being slaughtered in the late 19th century, other painting surfaces became available, such as muslin, paper, and canvas, giving birth to Ledger art. Contemporary Plains beadwork and jewelry used designs from hide painting.— — — — — —FormsCD-RISC2An abbreviated, two-item version of the CD-RISC, the CD-RISC2, was created in 2005 to reduce administration time. It assessed resilience in members of the general population as well as patients with Post-traumatic Stress Disorder, depression, and anxiety. The two items used for this scale are item 1 ("Able to adapt to change") and item 8 ("Tend to bounce back after illness or hardship"). These items were chosen because Connor and Davidson deemed them capable of "etymologically capturing the essence of resilience." After analysis of test-retest reliability, convergent validity, and divergent validity, the CD-RISC2 demonstrated "significant correlation" with both the CD-RISC as a whole and with the individual items of the CD-RISC. The authors argue that since the CD-RISC2 sufficiently represents the original measure, the 2-item CD-RISC2 can be utilized in place of the 25-item CD-RISC. 10-item CD-RISCCampbell-Sills and Stein (2007) refined the original 25-item CD-RISC and validated a 10-item version of the measure, called the CD-RISC-10. The authors recognized the 25-item version's acceptable demonstration of reliability and validity but were concerned about the measure's 5-factor structure. They were confused about the conceptual relationships between items that appeared in the same factors (e.g., positive acceptance and secure relationships) and questioned the statistical analyses used to reach the conclusions. In light of these concerns, the authors worked to establish the factor structure of the CD-RISC using a more systematic approach. Additionally, they hoped to analyze the measure's construct validity to further validate it. Using factor analysis and three independent samples, the authors concluded that modifying the original scale to only include 10-items would improve the validity of the scale. They deleted items that, theoretically, would make sense to include in a measure of resilience but that did not carry enough statistical weight to still be included (e.g. measures of social support). They used exploratory factor analysis and confirmatory factor analysis to justify these deletions. The 10 items included in this abridged scale assess one's ability to endure difficult experiences, including "change, personal problems, illness, pressure, failure, and painful feelings." The authors found that scores on the 10-item CD-RISC correlated highly with score on the original 25-item CD-RISC. There were limitations to this analysis. For example, the samples used in this study to evaluate the psychometric properties of the 10-item CD-RISC did not include a clinical sample or a sample of individuals who had experienced high levels of trauma. Because of this, the conclusions drawn cannot be applied to these populations. The authors recognize that this could be considered an issue since the concept of resilience is often only considered relevant when related to the experience of trauma. However, the authors explain that resilience can be applied to more moderate levels of stress. Therefore, the concept of resilience and the 10-item CD-RISC measure can be applied to the general population, not just those who have experienced trauma. The authors also cite problems with using retrospective self-report to collect data (which, in this case, was unavoidable) and suggest that a resilience measure that does not rely on self-report should be created.
Mandatory Palestine National Football Team
Mandatory Palestine National Football Team
Mandatory Palestine national football teamThe Mandatory Palestine national football team, also known as the Eretz Israel national football team (Hebrew: ×בחרת ארץ ישראל בכדורגל‎, romanized: Nivheret Eretz Yisrael Bekhadurgel, lit. 'Land of Israel national football team'), represented the British Mandate of Palestine in international football competitions, and was managed by the Palestine Football Association (Hebrew: התאחדות ארץ ישראלית למשחק כדור-רגל‎, romanized: Hitachduth Eretz Yisraelit Lekhadur Regel, lit. 'The Land of Israel Association of Football').[a] Founded in 1928, the Palestine Football Association became a member of FIFA in 1929. The team used to play in the Maccabiah Stadium and Hapoel Ground, both located in Tel Aviv. Mandatory Palestine played five official games (four FIFA World Cup qualifiers, and one friendly), before it officially became the national team of Israel in 1948.— — — — — —Mali women's national football teamMali women's national football team represents Mali in women's international football and is overseen by the Malian Football Federation, the governing body for football in Mali. They play their home matches at the Stade Modibo Kta, a multi-purpose stadium located in the city of Bamako. Currently, Mali is ranked 85th in FIFA Women's World Rankings. They have never qualified for a FIFA Women's World Cup, but made a total of six appearances in the Africa Women Cup of Nations since the 2002 edition.— — — — — —Iran national football team results (2010–19)This is a list of official football games played by Iran national football team between 2010 and 2019.— — — — — —South Korea national football team all-time recordThe list shown below shows the South Korea national football team all-time international record against opposing nations. The stats are composed of FIFA World Cup, AFC Asian Cup, FIFA Confederations Cup, and Summer Olympics matches, as well as numerous international friendly tournaments and matches— — — — — —2016 Indonesia national football team resultsThe following article is a summary of the 2016 Indonesia national football team results— — — — — —Argentina national football team 1920–39 resultsThis page details the match results and statistics of the Argentina national football team from 1920 to 1939— — — — — —History of the Lebanon national football teamThe history of the Lebanon national football team dates back to 1934, when Lebanon played its first game against Romanian side CA Timioara (T.A.C.) in Beirut. The national team, also referred to as "the Cedars", represents the nation of Lebanon in international football. It is fielded by the Lebanon Football Association and competes as a member of AFC. Lebanon participated twice in the Asian Cup: in 2000, when they hosted the event, and in 2019. The national team has also competed in other continental and regional competitions, such as the WAFF Championship, the Arab Nations Cup, the Pan Arab Games, the Asian Games and the Mediterranean Games.— — — — — —Republic of Ireland national football team – record in major tournamentsThis page covers the record of the Republic of Ireland national football team in the FIFA World Cup, European Football Championship and UEFA Nations League. In the "Results" section, home results are written before away results. Where the Republic of Ireland only played a team once, (h), (a) and (n) indicate home, away or neutral respectively.— — — — — —Turkey women's national football team resultsThis article lists the results for the Turkey women's national football team. . Win Draw Loss— — — — — —Chile national football team results (1990–99)This is a list of the Chile national football team results from 1990 to 1999— — — — — —Spain national football team results (1970–79)These are all the matches played by the Spain national football team between 1970 and 1979:— — — — — —China women's national football team results and fixturesThis article lists the results and fixtures for the China women's national football team.— — — — — —Wales national football team results 1876–1899The Wales national football team represents Wales in international association football and is governed by the Football Association of Wales. The team are the third oldest in international football, behind only Scotland and England and played their first match on 18 March 1876, a 4-0 defeat to Scotland at Hamilton Crescent in Glasgow. Wales played their first home fixture the following year, which Scotland won 2-0 at the Racecourse Ground in Wrexham.[a] Wales met England for the first time in 1879 and recorded their first victory against the them two years later, winning 1-0 at Alexandra Meadows following a goal from John Vaughan. In 1882, Wales played Ireland for the first time, defeating them 7-1 at the Racecourse. With all four Home Nations playing annual friendly matches, the decision was taken to organise the fixtures into a competition. The British Home Championship, a round-robin tournament, was subsequently formed and the inaugural season was held in 1884. Wales won their opening fixture 6-0 against Ireland but defeats against England and Scotland in their remaining matches led to a third place finish. In 1888, Wales recorded the largest victory in the team's history by defeating Ireland 11-0; Jack Doughty scored four of his side's goals. It was not until 1895 that Wales finished higher than third in the Championship, claiming a second place finish after drawing all three fixtures. From the nation's first fixture in 1876 to the end of the century Wales played 63 fixtures, winning 11, drawing 8 and losing the remaining 44. Of the side's victories, 9 were secured over Ireland and 2 over England, while they failed to defeat Scotland in 24 attempts during this period. The team's struggles were exacerbated by the reluctance of clubs in the Football League to release Welsh players for international fixtures, which often clashed with league matches. In the 1890s, Wales finished bottom of the British Home Championship in six of the ten tournaments held and lost nine of their final ten matches in the decade.
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