properties of the discrete time fourier transform
Các phương pháp xử lý tín hiệu dùng bộ lọc, phương pháp Fourier Transform, STFT( Short Time Fourier Transform)
... Trong miền tần số: phương pháp Fourier Transform. - Trong miền thời gian và tần số: STFT( Short Time Fourier Transform) . 2.4.1. Phương pháp Fourier: 2.4.1.1. Biến đổi Fourier: Cho một hàm f(t) ... được một biến đổi Fourier cục bộ, chúng ta có thể định nghĩa một biến đổi Fourier cửa sổ. Tín hiệu đầu vào được nhân với một hàm cửa sổ W(t - τ) và sau đó lấy biến đổi Fourier của nó. Kết ... đổi Fourier của nó được định nghĩa: () () ()tfedtetfFtitj,ωωω ==∫∞∞−− (2.14) Biến đổi Fourier ngược là: () ()∫∞∞−= ωωπωdeFtftj21 (2.15) Giả sử rằng biến đổi Fourier...
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Tài liệu Psychometric properties of the quality of life scale Child Health and Illness Profile-Child Edition in a combined analysis of five atomoxetine trials pdf
... changes over time impossible. The objectives of the present combined analysis were toevaluate the psychometric properties of the CHIP-CE atbaseline and over time and to assess the correlationbetween ... touse the sub-domains rather than the domains of the CHIP-CE when evaluating ADHD patients. This is supported by the factor analysis based on the sub-domains and the correlation analysis of the ... and the core symptoms. The influ-ence of the QoL of the parents or the parents’ diseases(such as ADHD) could not be assessed because these datawere not obtained.Conclusions The strength of...
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Tài liệu Báo cáo khoa học: Toggle switches, pulses and oscillations are intrinsic properties of the Src activation/deactivation cycle doc
... presenting the pulse of Src activity in the plane of the inactive and active fractions, siand s1. If the duration of the stimulus exceeds the critical value, the trajectory in the (si, ... 2009 The Authors Journal compilation ê 2009 FEBS parameters and, for clarity of exposition, we present the analysis of the Src cycle in terms of Eqns (6–8).Intrinsic regulatory properties of the ... steady states of the Src cycle. When there are threeintersections, the steady state O1at the lower branch of the Z-shaped curve (i.e. low Src activity) and the stateO3at the upper branch...
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Tài liệu Báo cáo khoa học: Properties of the recombinant glucose⁄galactose dehydrogenase from the extreme thermoacidophile, Picrophilus torridus ppt
... cleft, the putative catalytic zinc being at the bottom of the cleftand a lobe containing the structural zinc at the mouth of the cleft and thus exposed to the solvent [8]. Grad-ual depletion of the ... However, the addition of ZnCl2to the incubationbuffers showed a marked effect on the stability of the enzyme at both high temperature and acidity. Thiseffect was the same across the range of ZnCl2concen-trations ... Novagen.Expression of Pt-gdh under the control of araB promoterwas induced for 4 h at 30 °C by the addition of 0.2% ara-binose when the A600 of the growing culture reached 0.5. The cells from...
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Tài liệu Báo cáo Y học: Electrochemical, FT-IR and UV/VIS spectroscopic properties of the caa3 oxidase from T. thermophilus docx
... to the different environ-ment of the heme centers. The difference signals observed at442 nm and 603 nm can be assigned to the contributions of the hemes a and a3, with the position of the ... modes on the basis of the datapresented here, in spite of the fact that bands in the difference spectra are observed in the region where the modes were attributed. The vibrational modes of bound ... particular problem of the assignment in the differencespectra is the superposition of signals from differentconstituents of the oxidase, which can lead to the possibility of multi component...
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Tài liệu Báo cáo Y học: Short peptides are not reliable models of thermodynamic and kinetic properties of the N-terminal metal binding site in serum albumin doc
... solution by the rest of the protein. There is no correlation between the complex stability and the rate of its formation. The Ni(II) for Cu(II) exchange rates f or peptides are o f the order of 10)6s)1in ... albumins. On the other hand, the directthermodynamic and kinetic characterization of Ni(II)binding at site I in HSA and BSA was obtained. Thesedata can be very useful in further studies of the toxicolo-gically ... values of *K, the equilibrium constant of the actual complexformation reaction:M ỵ HnL ẳ MHjL ỵnỵjịHỵThis constant represents the overall ability of ligand L toform a given complex. The other...
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Tài liệu MECHANICAL PROPERTIES OF THE HEART AND ITS INTERACTION WITH THE VASCULAR SYSTEM ppt
... characterize the time course of change in ventricular mechanical properties by plotting the time course of change in the slope of the instantaneous PVR. Above, we referred to the slope of the ESPVR ... interaction between the ongoing contraction process of the cardiac muscles and the properties of the arterial system and is beyond the scope of this lecture. As the contraction process of the cardiac ... contraction there is a period of time during which the mechanical properties of the heart are characterized by the EDPVR; knowledge of the EDPVR allows one to specify, for the end of diastole,...
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Báo cáo khoa học: Structure analysis of the flavoredoxin from Desulfovibrio vulgaris Miyazaki F reveals key residues that discriminate the functions and properties of the flavin reductase family pdf
... reverse-phase HPLC on a C8column,and the retention time of the obtained prosthetic groupwas compared with those of flavin derivatives. The retention time of the prosthetic group bound to recom-binant ... of the structure of NADP+-bound FeRrevealed that the nicotinamide moiety of NADP+faces the re-side of the isoalloxazine ring, and that the 2Â-P-AMP moiety is held in the groove between the ... direction along the b10 of the other mono-mer, forming an anti-parallel intermolecular b sheet(Fig. 2A). The subsequent residues of the loop (Ala7–Pro13) turn into the interior of the dimer interface,and...
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Báo cáo khoa học: Effect of oculopharyngeal muscular dystrophy-associated extension of seven alanines on the fibrillation properties of the N-terminal domain of PABPN1 pot
... alanines are likely. The manner in which the number of alanines determines the atomic structure of the fibril and the b-strandarrangements remains to be determined.Yet, knowledge of the structure and ... using the nanoscope analysis software.Chemical stability of fibrils The chemical stability of fibrils was tested after the fibrilla-tion process was completed (no further rise of ANS sig-nals). The ... consisting primar-ily of PABPN1. Poly l-alanine-dependent fibril formation was studied using the recombinant N-terminal domain of PABPN1. In the case of the proteinfragment with the expanded poly...
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Báo cáo khóa học: Structural properties of the protein SV-IV potx
... identified by the massincrease of 42 mass units. The relative level of acetylation of a peptide was estimated on the basis of the intensity ratio of the native and acetylated species. From the data ... a-helix in the whole protein, and the 1–70region is poorly structured.SDS increases the a-helix content of proteins revealing the helical potential. The a-helix content of the monomericform of SV-IV ... Lys80,showed partial acetylation at one of the three residues,because the signal of the triacetylated species was lessintense than that of the diacetylated species. The MS/MSFig. 2. Secondary-structure...
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Báo cáo khoa học: Spectroscopic and kinetic properties of the horseradish peroxidase mutant T171S Evidence for selective effects on the reduced state of the enzyme potx
... the ferrous state of the mutant may contribute to anincrease in the disorder and hence entropy of the reduced state of the mutant compared to that of the wild-type protein.In contrast to the ... disposition of the proximal His and Asp residues, affecting the imidazo-late character of the His, but also by the formation of a LS species. The latter indicating the probable bind-ing of His42 to the ... impacton the properties of His170. The strength of the hydro-gen bond between the proximal His and Asp residues,and thus the imidazolate character of the His is expec-ted to modulate not only the...
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Báo cáo Y học: Properties of the Na+/H+ exchanger protein Detergent-resistant aggregation and membrane microdistribution potx
... [1,4]. The protein is known to exist as a dimer and the NHE1 isoform specifically dimerizes to itself and not toother isoforms of the Na+/H+exchanger [5].Although the NHE1 isoform of the Na+/H+exchangeris ... concentrations of the fractions, together with the relative amount of Na+/H+exchanger present in the supernatant and the pellet [19], it was found that over 80% of the Na+/H+exchanger remained in the ... that couldeither alter the distribution of the Na+/H+exchanger or the constituency of the lipid rafts, we used an establisheddetergent-free lipid raft isolation procedure for some of ourstudies...
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Báo cáo Y học: Electrostatic properties of the structure of the docking and dimerization domain of protein kinase A IIa doc
... the site of interaction with AKAP proteins [5,6]. The symmetry axis of the dimer is along the y-axis shown in the Figure. Figure 4Bshows the van der Waals model of the top face of the beststructure ... A further rotation of the orientation of RIIaD/D of Fig. 4B by 180° about the x-axis shows the bottomface of RIIa D/D (Fig. 4C). There is some hydrophobiccharacter in the bottom face of RIIa ... bar at the C-terminus of eachhelix corresponds to the variable helical range within the ensemble of the 24 structures. There is no variation at amino terminus of each helix. The sequence of ionizable...
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Báo cáo khoa học: Biochemical properties of the human guanylate binding protein 5 and a tumor-specific truncated splice variant Mark Wehner and Christian Herrmann doc
... con-served in the primary structure of the GTPase domain of hGBP5, so the formation of GMP must be impairedin an as yet unknown manner. Sequence alignments of the large GTP-binding domains of hGBP1, ... for the lack of GMP formation(see Fig. S2). The similar hydrolytic activities of the a ⁄ b and C-terminally truncated forms of hGBP5 are incontrast to that of the analogous deletion mutant of hGBP1 ... account). The size of the protein complex is onlyslightly increased when nucleotide-free or in the presence of GTP. As with hGBP5ta, the complex isincreased to the size of a tetramer after binding of GppNHp,...
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Báo cáo khóa học: Functional properties of the protein disulfide oxidoreductase from the archaeon Pyrococcus furiosus A member of a novel protein family related to protein disulfide-isomerase doc
... of the PDI [42], and t hat this site is far away from the redox active sites in the sequ ence. Furthermore, the measurements of the rates of PDI-catalysed refolding of scrambled RNase A, in the ... (225 mM)9:1(25 mM). At the end of the incubation, 40 lL of the mixturewas added to each of the five solutions; these were then leftto react on ice for 5 min. The reaction mixtures w ereanalysed ... of the active site in the N-unit. As regards the oxidative activity, the two units alsodisplay differences in their functional properties, with the site at the C-termus always predominant, the...
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Tìm thêm: xác định các mục tiêu của chương trình khảo sát các chuẩn giảng dạy tiếng nhật từ góc độ lí thuyết và thực tiễn khảo sát chương trình đào tạo của các đơn vị đào tạo tại nhật bản khảo sát chương trình đào tạo gắn với các giáo trình cụ thể xác định thời lượng học về mặt lí thuyết và thực tế tiến hành xây dựng chương trình đào tạo dành cho đối tượng không chuyên ngữ tại việt nam điều tra đối với đối tượng giảng viên và đối tượng quản lí điều tra với đối tượng sinh viên học tiếng nhật không chuyên ngữ1 khảo sát các chương trình đào tạo theo những bộ giáo trình tiêu biểu xác định mức độ đáp ứng về văn hoá và chuyên môn trong ct phát huy những thành tựu công nghệ mới nhất được áp dụng vào công tác dạy và học ngoại ngữ các đặc tính của động cơ điện không đồng bộ hệ số công suất cosp fi p2 đặc tuyến hiệu suất h fi p2 đặc tuyến mômen quay m fi p2 đặc tuyến dòng điện stato i1 fi p2 động cơ điện không đồng bộ một pha phần 3 giới thiệu nguyên liệu từ bảng 3 1 ta thấy ngoài hai thành phần chủ yếu và chiếm tỷ lệ cao nhất là tinh bột và cacbonhydrat trong hạt gạo tẻ còn chứa đường cellulose hemicellulose chỉ tiêu chất lượng theo chất lượng phẩm chất sản phẩm khô từ gạo của bộ y tế năm 2008