... 1983 to distinguish between near-field andfar-field dispersion problems They defined the “near-wake” region as x/H < 5, where x is Trang 3the distance of the receptor from the source and H is ... building.Similarly, Wilson et al., 1998 defined near-field to be the distance within the“recirculation region” from the source which is estimated from the dimensions of thebuilding perpendicular ... of the effects of upstream buildings on near-field pollutant dispersion Theeffect of downstream buildings of different geometries on effluent dispersion fromrooftop emissions was performed by
Ngày tải lên: 19/10/2022, 02:48
... loop antenna, the magnetic field dominates in the near-field zone For a dipole antenna, the electric field dominates the near field zone The dominant field in the near-field zone is used as the ... desirable in the near-field UHF RFID system 2.5 Near-field UHF RFID Reader Antenna 2.5.1 Design Considerations of Near-field UHF RFID Reader Antenna Close detection range The near-field reader ... the reactive near-field boundary is given by: where D is the largest dimension of the antenna 2.1.2 Radiating Near-field Region In the radiating near-field region, the angular field distribution
Ngày tải lên: 16/10/2015, 15:37
Tìm hiểu về công nghệ truyền thông tầm ngắn NFC (near field communication) và ứng dụng công nghệ này ở việt nam
... LUẬN NHÓM THỰC HIỆN NHÓM 2 Trang 2ĐỀ TÀI: TÌM HIỂU VỀ CÔNG NGHỆ TRUYỀN THÔNG TẦM NGẮN NFC (NEAR FIELD COMMUNICATION) VÀ ỨNG DỤNG CÔNG NGHỆ NÀY Ở VIỆT NAM Trang 3I Tìm hiểu về công nghệ truyền ... Trang 4I Tìm hiểu về công nghệ truyền thông tầm ngắn NFC Trang 51.1 Khái niệm công nghệ NFCNFC (Near-Field Communications) là công nghệ kết nối không dây phạm vi tầm ngắn trong khoảng cách 4 cm,
Ngày tải lên: 05/12/2016, 15:15
Tìm hiểu công nghệ truyền thông tầm ngắn NFC ( Near Field Communication) và ứng dụng công nghệ hiện nay trên Thế Giới và Việt Nam
... lớp học phần 1557PCOM0111 Đề tài : Tìm hiểu công nghệ truyền thông tầm ngắn NFC ( Near Field Communication) và ứng dụng công nghệ hiện nay trên Thế Giới và Việt Nam Trang ... phạm vi ới công nghệ RFID được cấp cho Charles Walton Trang 82 So sánh NFC và RFID"NFC (Near Field Communication) là t p h p các chu n đ thi t l p liên l c vô ập hợp các chuẩn để thiết lập
Ngày tải lên: 04/05/2017, 22:09
Tìm hiểu về công nghệ truyền thông tầm ngắn NFC ( Near Field Communication) và ứng dụng công nghệ này hiện nay trên thế giới và Việt Nam
... Mụn: Thương mại điện tử căn bản Đề tài : Tỡm hiểu về cụng nghệ truyền thụng tầm ngắn NFC ( Near Field Communication) và ứng dụng cụng nghệ này hiện nay trờn thế giới và Việt Nam Lớp tớn ... cũng như trong những chiếc điện thoại smartphone, mọi người đã và đang sử dụng công nghệ NFC ( Near Field Communication) Nhưng chắc chắn rất nhiều người trong số đó vẫn còn rất mơ hồ về khái niệm ... công nghệ đang là tâm điểm của sự chú ý trên điện thoại gần đây là NFC NFC là tên viết tắt của Near Field Communication, tạm dịch là công nghệ giao tiếp tầm ngắn Tuy nhiên, không ít người trong
Ngày tải lên: 18/05/2018, 20:15
Tìm hiểu về công nghệ truyền thông tầm ngắn NFC ( Near Field Communication) và ứng dụng công nghệ này hiện nay trên thế giới và Việt Nam
... Mụn: Thương mại điện tử căn bản Đề tài : Tỡm hiểu về cụng nghệ truyền thụng tầm ngắn NFC ( Near Field Communication) và ứng dụng cụng nghệ này hiện nay trờn thế giới và Việt Nam Lớp tớn ... cũng như trong những chiếc điện thoại smartphone, mọi người đã và đang sử dụng công nghệ NFC ( Near Field Communication) Nhưng chắc chắn rất nhiều người trong số đó vẫn còn rất mơ hồ về khái niệm ... công nghệ đang là tâm điểm của sự chú ý trên điện thoại gần đây là NFC NFC là tên viết tắt của Near Field Communication, tạm dịch là công nghệ giao tiếp tầm ngắn Tuy nhiên, không ít người trong
Ngày tải lên: 01/07/2018, 16:59
ĐIỆN tử VIỄN THÔNG near field communication khotailieu
... over other available wireless technologies The design includes a near-field transmitter and receiver to send data from one computer to another Trang 3Benefits & Featurescommunicate ... input from 3.7V to 4.2V from the PC interface Outputs a signal whose frequency varies according to the input voltage level Trang 13VCO OutputTrang 14Power Amplifier Accepts an input from the ... Trang 26 Strengths No interference due to decaying fields Within FCC regulation FCC requires max E-field of 334uV/m at 30m Our max E-field at 30m is 180uV/m Weaknesses Very small range
Ngày tải lên: 12/11/2019, 13:48
Điện tử viễn thông near field communication in cell phones khotailieu
... Trang 7un-2 Standards and CompatibilityNear Field Communication is an open platform technology, developed by Philipsand Sony NFC, described by NFCIP-1 (Near Field Communication Interfaceand Protocol ... NFC and RFID and confronts NFC with Bluetooth and infrared Chap-ter 5 observes the Near Field Communication from the security point of view,considering different types of attack In Chapter 6 ... Trang 51 IntroductionNear Field Communication (NFC) is a technology for contactless short-rangecommunication Based on the Radio Frequency Identification (RFID), it usesmagnetic field induction to
Ngày tải lên: 12/11/2019, 19:54
Security for near field communication systems in E-payment application
... field of NXP Keywords: NFC; E-payment; Mifare DESfire; EV2; RF; Hardware security; Digital channel 1 OVERVIEW AND SECURITY ISSUES OF NEAR FIELD COMMUNICATION SYSTEMS 1.1 Overview of near field ... FOR NEAR FIELD COMMUNICATION SYSTEMS IN E-PAYMENT APPLICATION Pham Thanh Cong1*, Trinh Quang Kien2, Nguyen Ngoc Thai1, Le Hai Nam2 Abstract: The paper presents an overview of the near field ... Dennis Giese, “Security Analysis of Near-Field Communication (NFC) Payments”, 2018 [9] "https://www.grandviewresearch.com/press-release/global near field communication nfc market,"
Ngày tải lên: 05/11/2020, 08:30
Estimation of above ground biomass and carbon stocks of mangrove forests from remote sensing and field data in mong cai city quang ninh province during 2016 2019
... for field GIS environment sector Here, the subject will introduce one of GIS tools that vegetation index separated from the near-infrared band, infrared and red strip intermediate parameters from ... in Vietnam Stemming from this reality our group choose the project name is “Estimation of above-ground biomass and carbon stocks of mangrove forests from remote sensing and field data in Mong ... between field measurements and RS data and then extrapolating these relationships over large areas is very useful (Fu, et al., 2011) To determine the relationship between above-ground field biomass
Ngày tải lên: 23/06/2021, 17:05
Estimation of above ground carbon stocks of mangrove forests from remote sensing and field data in hai ha district quang ninh province during 2016 2019
... mangrove areas have not been different from the general trend of the world From 1943 to 2000, the total area of mangrove forest was significantly reduced from 400,000 ha (Hong et al, 1997) to ... sub-plot were obtained automatically from NDVI map of mangrove forest Step 4: Regression model development NDVI and AGB value of each sub-plot from field survey were acquired to develop ... biomass/carbon increased from 2016 to 2019 “change” = 0: amount of biomass/carbon unchanged from 2016 to 2019 “change” < 0: amount of biomass/carbon decreased from 2016 to 2019 Step
Ngày tải lên: 23/06/2021, 17:05
Ubiquitous computing developing and evaluating near field communication applications
... technology. (2) Near-field RFID: Near-field RFID uses magnetic induction between a reader and a tag Near-field induction is illustrated in Fig 10, where an RFID reader generates a magnetic field by ... increases, the effective range of near-field coupling decreases, and energy constraints further limit applications requiring higher power.Near Field Communication (NFC)Near Field Communication (NFC) ... transmission (Want 2006) A distinction is made between the (1) far-field RFID and the (2) near-field RFID: (1) Far-field RFID: Tags using far-field principles operate above 100 MHz, typically in the Backscatter
Ngày tải lên: 17/09/2021, 15:49
USE-ATTAINABILITY ANALYSIS, LOWER FRENCH GULCH AND THE BLUE RIVER DOWNSTREAM FROM FRENCH GULCH NEAR BRECKENRIDGE, SUMMIT COUNTY, COLORADO
... Trang 1USE-ATTAINABILITY ANALYSIS, LOWER FRENCH GULCH AND THE BLUE RIVER DOWNSTREAM FROM FRENCH GULCH NEAR BRECKENRIDGE, SUMMIT COUNTY, COLORADO Prepared on Behalf of Summit Water Quality Committee ... Component Trang 6USE-ATTAINABILITY ANALYSIS, LOWER FRENCH GULCH AND THE BLUE RIVER DOWNSTREAM FROM FRENCH GULCH NEAR BRECKENRIDGE, SUMMIT COUNTY, COLORADO Executive Summary The Blue River Use-Attainability ... and input from the Colorado Division of Wildlife In addition, data the EPA Ambient Water Quality Criteria documents were also review The UAA evaluated both acute and chronic toxicity from D-Zn,
Ngày tải lên: 18/10/2022, 01:33
active thermal extraction and temperature sensing of near field thermal radiation
... placed in the near-field of a substrate The external pump photons excite the rare-earth emitter and result in blue-shifted fluorescence due to coupling to the near-field thermal radiation from the ... with the thermal near-field With external pumping, the near-field energy absorbed by the emitter can combine with the pump to be remitted as blue-shifted light into the far-field18 We model the ... Kim, K et al Radiative heat transfer in the extreme near field Nature 528, 387–391 (2015). 12 St-Gelais, R., Zhu, L., Fan, S & Lipson, M Near-field radiative heat transfer between parallel structures
Ngày tải lên: 08/11/2022, 15:04
Estimation of above ground biomass and carbon stocks of mangrove forests from remote sensing and field data in mong cai city, quang ninh province during 2016 – 2019
... for field GIS environment sector Here, the subject will introduce one of GIS tools that vegetation index separated from the near-infrared band, infrared and red strip intermediate parameters from ... in Vietnam Stemming from this reality our group choose the project name is “Estimation of above-ground biomass and carbon stocks of mangrove forests from remote sensing and field data in Mong ... between field measurements and RS data and then extrapolating these relationships over large areas is very useful (Fu, et al., 2011) To determine the relationship between above-ground field biomass
Ngày tải lên: 09/08/2023, 13:00
Estimation of above ground carbon stocks of mangrove forests from remote sensing and field data in hai ha district, quang ninh province during 2016 2019
... corresponding NDVI value NDVI values of sub-plot were obtained automatically from NDVI map of mangrove forest NDVI and AGB values from field surveys were collected to develop a regression model, with AGB ... of biomass/carbon increased from 2016 to 2019 “change” = 0: amount of biomass/carbon unchanged from 2016 to 2019 “change” < 0: amount of biomass/carbon decreased from 2016 to 2019 Step 3: ... predominantly coming from the east and south, while winter waves are mainly from the north and northeast The average wave height is approximately 0.5 meters, with a typical wavelength ranging from 30 to
Ngày tải lên: 09/08/2023, 13:00
Near field coherent anti stokes raman scattering (CARS) microscopy for bioimaging
... Schematic of near- field LP-CARS or RP-CARS field generation 47 Comparison of near- field CARS intensity distributions between RP- and LP-CARS generated from pure water .48 Near- field intensity ... numerical study of CARS microscopy in the near- field region, including near- field CARS generation from two adjacent scatterers and the effects of scatterers’ sizes on near- field CARS under tightly ... near- field effects of CARS microscopy, including near- field CARS generation from two adjacent scatterers as well as the effects of scatterers’ sizes and the excitation polarizations on CARS microscopy...
Ngày tải lên: 09/09/2015, 18:54
Scanning near field photon emission microscopy
... implementation Photon Emission Microscopy for technology nodes beyond 50 nm Chapter Near- field Approach For resolution below 100 nm 2.1 Near- field optical detection Near- field condition 2.3,2.4 2.2 ... a nanometric probe placed into the near- field of the emission source The near- field is scattered by the probe and collected in the far -field Different near- field probe designs are available but ... of near- field optical detection as a means to enhance the optical lateral resolution below 100 nm The origin of the near- field optical interaction and the critical parameters of the near- field...
Ngày tải lên: 14/09/2015, 08:26
BEST PRACTICES IN SOCIAL MARKETING SAFE WATER SOLUTION FOR HOUSEHOLD WATER TREATMENT: LESSONS LEARNED FROM POPULATION SERVICES INTERNATIONAL FIELD PROGRAMS ppt
... learned from PSI’s eight years of field experience implementing safe water programs in 20 countries In the 1990s, the U.S Centers for Disease Control and Prevention (CDC), based on a series of field ... Bolivia, and PSI fielded the first commercial application Controlled trials confirmed that use of the SWS reduces the incidence of diarrhea under field conditions In Bolivia, a five-month field test ... chlorine solution (made by the chlorine gas injection method) from their neighbors (Mozambique and Malawi from South Africa, Nepal from India) More remote countries tend to dilute the more concentrated,...
Ngày tải lên: 23/03/2014, 04:21
Antibiotic resistant enterococci and staphylococci isolated from flies collected near confined poultry feeding operations potx
... isolates from poultry litter and two isolates from fly samples The nearly homologous staphylococcal gene, msr(A/B), was observed in four isolates from poultry litter and one isolate from fly ... litter samples were collected from three conventional poultry farms that raised the birds under contract for two major producers Litter samples were collected from three conventional broiler chicken ... Tn1545/916, were recovered from four enterococcal isolates from poultry litter and six from fly isolates, all of which also contained the erm(B) gene (Table 4) Two fly isolates from traps and placed...
Ngày tải lên: 23/03/2014, 21:20