Báo cáo hóa học: " Robust time delay estimation for speech signals using information theory: A comparison study" pot

... RESEARCH Open Access Robust time delay estimation for speech signals using information theory: A comparison studyFei Wen*and Qun WanAbstract Time delay estimation (TDE) is a fundamental subsystem ... is an information- theoretic measure of the information that one random variable contains aboutanother random variable. If we consider two variables x1Wen and Wan EURASIP Journal on Audio, Speech, ... twomeasures are presented for both Gaussian and Laplacian models. We show that, for stationary signals, the twomeasures are equivalent for TDE. However, for non-stationary signals (e.g., noisy speech...

Báo cáo hóa học: " Noninvasive positive pressure ventilation for acute respiratory failure in children: a concise review" potx

... pressureventilation for bilateral diaphragm paralysis after pediatric cardiacsurgery. Interact Cardiovasc Thorac Surg 2009, 8:171-172.30. Chin K, Uemoto S, Takahashi K, Egawa H, Kasahara M, Fujimoto Y, ... [29]case reports (cardiacsurgery)Bilateral diaphragmparalysisPICU, 2 0.9-3.5cBIPAPFacial mask,Nasopharyngealtube100 Improved RR, gas exchangeMajor complication: 100%(respiratory tract ... the application of NPPV as a means of“facilita ting” ventilation weaning, and as “curative” treat-ment for postextubation respiratory failure was asso-ciated with success rates of 81-86% and...

Báo cáo hóa học: " Real-time stereo matching architecture based on 2D MRF model: a memory-efficient systolic array" doc

... (53%)FBPChipFPGAImagePreprocessFPGA✲✛RightCamera✲LeftCamera✲✛Disparity Outto Grabber board (a) Overall system (b) Hardware boardFigure 17 The overall hardware system. (a) Overall system. (b) Hardware ... systolic arrayprocessorsFigure 1 Alternative architectures for parallel algorithms. (a) Parallel processors with a global memory. (b) Massive systolic array processors.Park et al. EURASIP Journal ... operations andmemory, making it the popular approach in real -time DSP systems [2,3] and parallel VLSI chips [4-7]. Thelocal method can be easily realized in the massive paral-lel structure as...

Báo cáo hóa học: " Research Article Channel Estimation for Two-Way Relay OFDM Networks" pot

... Both amplify-and-forward (AF) anddecode-and-forward (DF) protocols developed for one-wayrelay channels are extended to the half-duplex additive whiteGaussian noise (AWGN) two-way relay channel ... are assumed to be static over 50 time slots. Theﬁrst time slot is used to estimate the channel information and the remaining are used for data transmission. For datatransmission, BPSK modulation ... oftransmit receive ﬁlters, physical multipath, and relative delaysamong antennas. Each element of h1or h2is modeled as a zero-mean complex Gaussian random variable with varianceσ2i,l, i = 1, 2,...

Báo cáo hóa học: " Research Article Clock Estimation for Long-Term Synchronization in Wireless Sensor Networks with Exponential Delays" docx

... model rather than a linearmodel used in previous research. A detailed analysis of clock offset estimation assuming a symmetric exponential delay model was presented in [7]. For a known fixed delay, ... to another, for example, thesum of transmission time, propagation delay, reception time, Xrand Yrdenote the variable portion of delay and are as-sumed to be independent and exponentially ... estimate the clock offset was mathematically proved by[8] as the ML estimator under the exponential delay model.This confirms that the exponential delay assumption for therandom delays matches...

Báo cáo hóa học: " Research Article Perceptual Coding of Audio Signals Using Adaptive Time-Frequency Transform" pot

... provide a true evaluation of the coder performance. A second comparison was also performed by comparing theHE-AAC proﬁle of the MPEG-4 audio at the same bitrates tothat was achieved by the ATFT ... bit allocations were made. In arriving atthe ﬁnal bit allocations informal MOS tests were conductedto compare the quality of the 8 audio samples before and af-ter quantization stage.In total, ... sequentially. This isneeded to account for the nonstationarity associated with theaudio signals and also to maintain a low-signal delay in en-coding and decoding.In the proposed technique for a...

Báo cáo hóa học: " Space-Time Water-Filling for Composite MIMO Fading Channels" doc

... [1]. Channel state informa-tion is assumed to be available at the transmitter and poweradaption is performed with a total power constraint for eachchannel realization. T he capacity maximization ... spatial water-filling achieves al-most the same capacity as space -time water-filling. However, for Rayleigh channels with shadowing variance ρ= 8, thespace -time water-filling algorithm achieves approximately0.15 ... Monte Carlo simulations very well.We also compare the main advantages and disadvan-tages of space -time water-filling versus spatial water-fillingin Tabl e 3. For space -time water-filling, only...

Báo cáo hóa học: " Real-Time Signal Processing for Multiantenna Systems: Algorithms, Optimization, and Implementation on an Experimental Test-Bed" potx

... is performed automatically on alldata streams based on a comparison of the separated anddemodulated signals at the Rx and the data coming fromthe PRBS-data gener ator are also programmed inside ... 5TxFPGAtransmitter withparallel M-PAMdata sourcesends trainingpiolts, adaptsmodulation;preprocesses data for SVD-MIMO oradaptive channelinversionD/AD/AD /A Data 1Data 2Data k− 1Data k..................I/Q-modI/Q-modI/Q-modMIMOchannelI/Q-demodI/Q-demodI/Q-demodI1Q1IMQM A/ DA/DA/DRxFPGAperforms ... the FPGA islimited, then an I/Q preequalization at the Tx antennas andan I/Q equalization at the Rx antennas is a reasonable alter-native, but careful calibration is needed in advance. For lowsignal...

Báo cáo hóa học: " Robust Transmission of H.264/AVC Streams Using Adaptive Group Slicing and Unequal Error Protection" pptx

... 3(c) and 3(d),aframeofthe Foreman sequence and its macroblock allocation map(MBAmap) for three classes, according to the above rules,are presented. The area regarded as being of high-importancemainly ... optimal classification ofmacroblocks and the optimal channel rate allocation are achieved by iterating two interdependent steps. Dynamic programmingtechniques are used for the channel rate allocation ... algorithm for the efficient channel rate allocation. This ispresented in the ensuing section.3. CHANNEL RATE ALLOCATIONIn the preceding analysis for an optimal classification, it wasassumed that the...

Báo cáo hóa học: " Space-Time Chip Equalization for Maximum Diversity Space-Time Block Coded DS-CDMA Downlink " doc

... the pilot. The performance results are again averagedover 1000 random channel realizations, where for each chan-nel realization, we consider 10 random data and noise re-alizations corresponding ... Performance comparison for U = 15. for U = 1, U = 15, and U = 31 users, respectively. Theperformance results are averaged over 1000 random chan-nel realizations, where for each channel realization, ... with a spreadingfactor of N = 32, J = 2 transmit antennas at the base station,and M = 2 receive antennas at each mobile station. We as-sume that all channels are independent. We further assumethat...

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Từ khóa: Nghiên cứu tổ chức pha chế, đánh giá chất lượng thuốc tiêm truyền trong điều kiện dã ngoại Giáo án Sinh học 11 bài 13: Thực hành phát hiện diệp lục và carôtenôit Giáo án Sinh học 11 bài 13: Thực hành phát hiện diệp lục và carôtenôit ĐỒ ÁN NGHIÊN CỨU CÔNG NGHỆ KẾT NỐI VÔ TUYẾN CỰ LY XA, CÔNG SUẤT THẤP LPWAN NGHIÊN CỨU CÔNG NGHỆ KẾT NỐI VÔ TUYẾN CỰ LY XA, CÔNG SUẤT THẤP LPWAN SLIDE Phát triển mạng lưới kinh doanh nước sạch tại công ty TNHH một thành viên kinh doanh nước sạch quảng ninh Phát triển du lịch bền vững trên cơ sở bảo vệ môi trường tự nhiên vịnh hạ long Phát hiện xâm nhập dựa trên thuật toán k means Nghiên cứu tổng hợp các oxit hỗn hợp kích thƣớc nanomet ce 0 75 zr0 25o2 , ce 0 5 zr0 5o2 và khảo sát hoạt tính quang xúc tác của chúng Tìm hiểu công cụ đánh giá hệ thống đảm bảo an toàn hệ thống thông tin Thơ nôm tứ tuyệt trào phúng hồ xuân hương BT Tieng anh 6 UNIT 2 Tăng trưởng tín dụng hộ sản xuất nông nghiệp tại Ngân hàng Nông nghiệp và Phát triển nông thôn Việt Nam chi nhánh tỉnh Bắc Giang (Luận văn thạc sĩ)Tranh tụng tại phiên tòa hình sự sơ thẩm theo pháp luật tố tụng hình sự Việt Nam từ thực tiễn xét xử của các Tòa án quân sự Quân khu (Luận văn thạc sĩ)Giáo án Sinh học 11 bài 15: Tiêu hóa ở động vật Nguyên tắc phân hóa trách nhiệm hình sự đối với người dưới 18 tuổi phạm tội trong pháp luật hình sự Việt Nam (Luận văn thạc sĩ)Giáo án Sinh học 11 bài 14: Thực hành phát hiện hô hấp ở thực vật BÀI HOÀN CHỈNH TỔNG QUAN VỀ MẠNG XÃ HỘI HIỆU QUẢ CỦA MÔ HÌNH XỬ LÝ BÙN HOẠT TÍNH BẰNG KIỀM TÁI CHẾ NHỰA VÀ QUẢN LÝ CHẤT THẢI Ở HOA KỲ