Applications of the DFT
... present In other words, the length of the signal limits the frequency resolution This is distinct from the first factor, because the length of the input signal does not have to be the same as the length ... displacement of the water, and so on The shape of the time domain waveform is not important in these signals; the key information is in the frequency, phase and amplitude of the component sinusoids The DFT ... jargon, windows provide a trade-off between resolution (the width of the peak) and spectral leakage (the amplitude of the tails) To explore the theoretical aspects of this in more detail, imagine...
Ngày tải lên: 13/09/2012, 09:49
... the fundamentals of the wavelet theory: We discuss the time–frequency resolution of the wavelet transform and compare it to the common short–time Fourier transform The multiscaleproperty of the ... Its Applications 2001 [Sch01d] A historic overview of the development of the wavelet theory precedes the introduction of the (one–dimensional) continuous wavelet transform Here, the definition of ... in the expectation that a well–suited transformation will facilitate the reading, i.e., the analysis of the relevant information. Of course, the choice of the transform depends on the nature of...
Ngày tải lên: 25/12/2013, 05:17
... using punched cards There was a card per term, with the accession numbers of the documents containing the term punched on it; at the right hand side of the card were the numbers of * This document ... given at the Linguistic Research Center of the University of Texas, and elsewhere in the United States, in the spring of 1963 It is intended as a general reference work on the Theory of Clumps, ... the moment the first four rows of the sample matrix, we found that our previous cluster definitions were not satisfied for the first four objects if there was a 0 in the left half of any of the...
Ngày tải lên: 19/02/2014, 19:20
clinical applications of capillary electrophoresis
... not bake the tops 8 If the amplitude of the protein peaks becomes small, it may be because the inside of the inlet of the capillary has a buildup that is not letting the correct amount ofsample ... Visual inspection of the electrophoresis pattern is usually sufficient to decide onthe type of the monoclonal protein If the protein is of the same type as the anti- body, then the band will disappear ... becauseaddition of calcium lactate gave increased resolution of the β components Withthis buffer, workers then set about finding the balance of the correct dilution ofsample and injection time of the capillary,...
Ngày tải lên: 10/04/2014, 22:16
4 clinical applications of basic x ray physics principes
... on the image The amount of blur in Bf = F x (OlD/SOD), where F = focal spot size, OlD = object-image compare the focal spot blur to the size of the object itself, we calculate the blur in the ... as the anode angle The effective focal spot size is the length and width of the x-ray beam pro-jected down the central axis a larger area, but the rate of heat dissipation is spot track In clinical ... that reach the receptor Two of these meth-oils are the use of grids or an air gap Collima-tion to limit the volume of irradiated tissue also Grids level of scattered radiation reaching the image...
Ngày tải lên: 27/05/2014, 17:27
Báo cáo hóa học: " Phase I clinical trial of the vaccination for the patients with metastatic melanoma using gp100derived epitope peptide " pot
... throughout the body during the 1st course of vaccination in P2 and P3 Representative finding of vitiligo was observed in the posterior portion of the neck in P2 (A) and the anterior tibial portion of the ... expressed by the non-cancerous mel-anocytes The Fig 1A shows vitiligo at the posterior portion of the neck in P2, and Fig 1B showed vitiligo at the anterior tibial portion of the left leg in P3 The serial ... ELISPOT assay (Table 3), the responses of the patients were evaluated as ++ (strongly positive) if the numbers of IFN-g positive spots after the Table 1 Clinical profiles of enrolled patients Patients...
Ngày tải lên: 18/06/2014, 16:20
báo cáo hóa học: " Clinical usefulness of the screen for cognitive impairment in psychiatry (SCIP-S) scale in patients with type I bipolar disorder" doc
... each spoken presentation of the list The primary dependent variable is the sum of the number of words correctly recalled over the three trials The WMT is a variant of the Brown-Peterson Consonant ... limita-tion of the present study refers to the sample size, which is in the usual range of this sort of studies and provides a first step towards future investigations of the clinical applications of ... tolerance of the pro-cedures, and the time required to complete the SCIP The reliability of the SCIP was assessed by examination of alternate form equivalence, the test-retest reliability, the internal...
Ngày tải lên: 18/06/2014, 19:20
Novel Applications of the UWB Technologies Part 1 pdf
... Sn is the reference signal for one of the four constellation points Then the soft value of Ymk and Ysk is used after deciding the Euclidean distance, as the following: Soft( b2 ... the right to republish it, in whole or part, in any publication of which they are the author, and to make other personal use of the work. Any republication, referencing or personal use of the ... taken, the more reliable the CSI estimation is in the presence of thermal noise offering better decoding result The LS algorithm having low complexity to implement is one of the popular...
Ngày tải lên: 19/06/2014, 14:20
Novel Applications of the UWB Technologies Part 2 ppt
... maximum θ is required to retain the sign of the soft bit value; otherwise using a larger θ can make the sign of the soft bit value inverted, which causes errors for the soft bit decoding θ is set ... is used where m is the index of the numbers of soft bit value depending on the modulation scheme; k is the index into the 100 data subcarriers in an OFDM symbol Demapper Soft Bit ChannelEstimator ... allocation for TFC=1, BG=1 To avoid the cost of this CSI aided Viterbi decoder, the soft input of the decoding chain is obtained from the multiplication of the demodulation soft output R m and its corresponding...
Ngày tải lên: 19/06/2014, 14:20
Novel Applications of the UWB Technologies Part 3 potx
... the FCC spectral mask shown in Fig.11 The dynamic range of the amplitude of discrete components of OPPM scheme isabout 8 dB which is very high The power of the signal is calculated based on the ... suppress the noise from LPF(Low Pass Filter) But in that case, the linearity of the receiver will get worse In order to improve the linearity of the receiver, the conversion gain of the RF front-end ... for the off-chip antenna It should provide a maximum gain of 18 dB to suppress noise from mixer and baseband circuits As LNA sets the baseline for the noise figure of the receiver, the NF of the...
Ngày tải lên: 19/06/2014, 14:20
Novel Applications of the UWB Technologies Part 4 ppt
... single block of the receiver Trang 6Therefore, the complete development of the DC/PMU must be faced at the end of the designbut it shall not be considered less important than the others.It is ... included in the architecture The importance of this phase regards the identification of the non-ideal effects that impact on system-levelperformance, or, if the system leads the state-of-the-art, ... development of a new system, intendednot being reported in the state of the art, implies only the partial knowledge of the exactnon-ideality that may compromise performance The ADC quantization, the...
Ngày tải lên: 19/06/2014, 14:20
Novel Applications of the UWB Technologies Part 5 pot
... and the number of cross-auto-correlation values are equal to N NL u( 1) , respectively Then, the number of all correlation function values 2 u u According to the proof of Theorem 1, the sum of ... then their multiplication ( )( ) ( )( ) j i As a result, the binary TH correlation function in the equation (22) refers to the number of collisions The smaller C ij (l) gets, the smaller the ... (26), the first part is the signal that we desire The second part represents the MAI that the other users make to user 1, and the last part is the interference made by noise We are interested in the...
Ngày tải lên: 19/06/2014, 14:20
Novel Applications of the UWB Technologies Part 6 ppt
... independently of the other band Here, emphasis given on the low band of UWB (3.244-4.742 GHz) that is based on spread spectrum technique for WSN applications The main feature of the system ... estimation of the frame beginning. The performance improvement is enabled at the price of fine synchronization approach introduced in second floor which can further improve the timing offset found ... battery life The TransferJet Consortium was established in July 2008 by a group of international companies The main duties of the consortium include the development of the specification...
Ngày tải lên: 19/06/2014, 14:20
Novel Applications of the UWB Technologies Part 7 pot
... boost the performance... xOFDM , k (t kTOFDM )exp j 2 f( k mod 6)t k 0 Where, xOFDM , k (t ) is kth the OFDM symbol of duration TOFDM , N is the number of transmitted ... [...]... for the direct E/O conversion of the W-CDMA signal into radioover-fiber (ROF) signal The ROF UMTS signal propagated through a standard MMF (type OM3) of the length of 30m, and ... by a PIN diode Then, the detected signal was onward transmitted through the tested channel to the W-CDMA receiver The purpose of this experiment was the study of the wired channel...
Ngày tải lên: 19/06/2014, 14:20
Novel Applications of the UWB Technologies Part 8 doc
... across the gaps in the posts The antenna is fed at the upper plane A using the inner core (0.51 mm) of a 50Ω rigid coax cable with a total diameter of 2.16mm and 62mm length The outer shield of the ... between a referenced transmitter and the UWB RoF full-duplex system is observed Fig 6 The system Bit Error Rate (BER) The results show the feasibility of the RoF system; this would allow extending ... reciprocally with each other To predict the maximum achievable data rate at the allowed BER, packets of certain known length were sent over the in-car channel from the AP to the ME when the vehicle was...
Ngày tải lên: 19/06/2014, 14:20
Novel Applications of the UWB Technologies Part 9 potx
... radio nodes to the primary users and other secondary users The interferenceactually depends on the geographical positioning of the radio nodes (that is the distancebetween the nodes), the transmit ... networkthe node belongs to, what services the node offers, the regulatory and policy details of thenodes, and the nodes historical behavior etc Getting and maintaining all the informationabout the ... of each other and 2 2 WM u P SNR denotes the SNR of the primary WM signals received by the ith CR user where P WM is the total power of P WM signals In this chapter, we consider that there...
Ngày tải lên: 19/06/2014, 15:20
Novel Applications of the UWB Technologies Part 10 potx
... traffic of system A is one On the other hand, the airtime of system B becomes zero and interference time becomes 0.5 if the departure rate of system A is zero Therefore, the occupancy time of channels ... of system A cannot exceed 0.1 On the other hand, offered traffic of system A also increases interference time, of which maximal value is about 0.2 Therefore, if the system A requires more offered ... 10 As seen, the pulse consists of two parts: The real part (on the top) is even, and the imaginary (on the bottom) is odd Trang 2The autocorrelation function, as given by Eq (32), of the DAA pulse...
Ngày tải lên: 19/06/2014, 15:20
TRÌNH BÀY QUÁ TRÌNH CHỈ ĐẠO CHIẾN LƯỢC CÁCH MẠNG CỦA ĐẢNG TRONG THỜI KỲ 1930 - 1945. Ý NGHĨA CỦA SỰ ĐIỀU CHỈNH ĐÓ
... cấp nông dân lực lượng cách mạng Tư sản mại , tư sản dân tộc đứng phía đế quốc Tiểu tư sản theo không theo cách mạng Tiểu thương không tán thành cách mạng Tiểu trí thức hăng hái chống đế quốc ... phủ cộng hoà Hội nghị định thành lập mặt trận dân tộc phản đế Đông Dương với giai cấp trừ bọn Trofskytvà báo cải lương Lựclượng cách mạng công nhân, nông dân ,trí thức ;đoàn kết với tiểu tư sản ... mối quan hệ chống đế quốc phong kiến , hoàn chỉnh việc chuyển hướng chiến lược cách mạng nước ta theo tư tưởng Hồ Chí Minh giải phóng dân tộc ,nhằm giải mục tiêu số cách mạng độc lập dân tộc Để...
Ngày tải lên: 02/08/2013, 08:35
Tài liệu Giáo trình kỹ thuật điện: Mạch tự động điều chỉnh độ lợi AGC AUTOMATIC GAIN CONTROL pptx
... lại theo chiều dọc hình ảnh giản theo chiều dọc Vậy chỉnh R5 hình ảnh bị giản hay co lại theo chiều dọc R5: V.SIZE f Công dụng R6C4 R6C4 có tác dụng làm dòng quét dọc Iqd thay đổi tuyến tính theo ... hình ảnh đứng yên theo chiều dọc Nếu không hình ảnh trôi theo chiều dọc + Tín hiệu đồng ngang đồng hoá cho mạch quét ngang chạy tần số 15750Hz (hoặc 15625Hz) để hình ảnh đứng yên theo chiều ngang ... ảnh tuyến tính theo chiều dọc hình hình hình vẽ mô tả quan hệ độ tuyến tính dòng Iqdọc cuộn dây làm lệch tia điện tử (VDY) độ tuyến tính hình ảnh theo chiều dọc + Dòng quét Iqd theo đường thẳng...
Ngày tải lên: 15/12/2013, 16:15
thiết kế mạch điều chỉnh độ sáng đèn
... tượng Undo công cụ để di chuyển lại Khi di chuyển linh kiện theo sơ đồ nguyên lý, linh kiện xếp sau: Tiến hành nối chân linh kiện theo sơ đồ nguyên lý Nhấp chọn Place > Wire công cụ Con trỏ chuột ... kiện cần nối di chuyển trỏ đến chân linh kiện cần nối với nhấp chuột Cứ tiếp tục tất linh kiện nối theo sơ đồ nguyên lý sau: ĐẠI HỌC SƯ PHẠM KỸ THUẬT – KHOA ĐIỆN 214 BIÊN SOẠN : PHẠM QUANG HUY -...
Ngày tải lên: 30/12/2013, 08:41