design+operation+and+testing+of+synchronous+machines

... microphone signal and RMS values of the low-frequency (MMG) and high-frequency filtered signals during contrac- tion and movement. Alves and Chau Journal of NeuroEngineering and Rehabilitation ... by the unfused mechani- cal activities of motor units. The bulk movement of the muscle and asynchronous activation of fibers at the initi- ation and end of contraction creates a high-amplitude transient ... signals were band-pass filtered with a 5 th order Butterworth filter with a cut-off frequency range of 5-100 Hz. The low cut-off attenuates the effects of move- ment [30], while the high cut-off attenuates...

Ngày tải lên: 19/06/2014, 08:20

Ngày tải lên: 22/12/2013, 08:58

... ASYNCHRONOUS AND UNBALANCED OPERATION OF SYNCHRONOUS MACHINES The analysis of unbalanced operation of synchronous machines is quite involved, requiring manipulation of a large number of equations to ... K s = − ⎡ ⎣ ⎢ ⎤ ⎦ ⎥ cos sin sin cos θθ θθ (9.8-4) ASYNCHRONOUS AND UNBALANCED OPERATION OF SYNCHRONOUS MACHINES 369 Motor Starting The free acceleration characteristics of a synchronous motor with the fi eld ... reaches steady-state operation. On the other hand, the analysis of steady-state perfor- mance of a synchronous machine during asynchronous operation (pole slipping) is of importance. Over...

Ngày tải lên: 16/02/2014, 18:48

... advantages and disadvantages, and it is the designers task to find a suitable compromise that best fits the task at hand. Table 2.5 sum- marizes the frequency- and time-domain characteristics of these ... nearly flat in the passband and rolls off smoothly and monotonically. In addition, it has virtually no ripple in either the passband or the stopband. For these reasons, many designers regard the ... amplitudes and must therefore be amplified before their processing and display can be accomplished. The specifications and lists of characteristics of biopotential amplifiers can be as long and con- fusing...

Ngày tải lên: 29/03/2014, 11:20

... ‘shaftless’ and ribbon screws, ‘plug seals’, and a host of design variants offer scope for innovative and specialized functions. There are also a number of limitations and disadvantages of helical ... understanding grew of their advantages and limitations, the ingenuity of engineers produced a plethora of applications in all industries, from food and pharmaceuticals to waste and sewage handling. ... theory of flow in hoppers, in the late 1960s, that a sufficient understanding of the mechanics of solids was gained to facilitate a more scientific basis for the design of screw feeders and their...

Ngày tải lên: 01/04/2014, 11:52

... the Instron™ tensile testing instru- ment, courtesy of the University of Bath, England, showed that the stress-strain profile of the unadulterated PU foam sample and that of the PPy-coated PU ... durable and washa- ble over an indefinite period of time. In a garment-inte- grated context, washability of components is important to the preservation of normal user patterns of care and main- tenance ... sensor foams are composites of PPy and PU and so the absolute resistance of the foam will be affected by each of these components. Firstly the absolute resistance of the PPy may vary with time...

Ngày tải lên: 19/06/2014, 10:20

... assume that the signal bandwidth of V(t)andH(t) (hence the bandwidth of  V(t )and  H(t)) is B S , and that the bandwidth of n V (t)andn H (t)isB n (equal to the receive antenna bandwidth). Usually, ... in (25), and the results are shown in Figures 5 and 6. In the simulation, both the SNR V and the SNR H terms are equal, and the bandwidth of the antenna is 10 MHz wider than the bandwidth of the ... avoid truncation of the wider spectrum caused by the modulation. The bandpass filter has a bandwidth of 100 MHz and is centered at 3 GHz. In Figure 5, a low-pass filter bandwidth of 10 MHz is used...

Ngày tải lên: 21/06/2014, 23:20

... in Figure 9, the crystal structures of two Cd(II)-based MOFs (i.e., Cd MOF-1 and Cd MOF-2) and three Cu(II)-based MOFs (i.e., Cu MOF-1, Cu MOF-2 and Cu MOF-3) we have prepared all feature non-cubic ... the case of Cd MOF-1 and Cd MOF-2, they exhibit smaller channels then designed while remaining some degree of porosity. Figure 34 Adamentine view of a single fold of framework of Cd MOF-2, which ... 4-(imidazolyl) benzoic acid ligands: Cu MOF-3N, Cu MOF-4, Cu MOF-5 and Cd MOF-3. Cu MOF-5 and Cd MOF- 3 exhibit saturated octahedral coordination, showing square planer and tetrahedral distribution...

Ngày tải lên: 02/07/2014, 12:59

... techniques and requirements of PV/S inspection and testing and certified by the PSM may witness pressure relief valve set tests and hydrostatic tests of nonwelded tubing and flex hoses in place of ... Category A PV/S. a. Applicable Codes and Standards Design Category A PV/S to the applicable sections of the codes and standards listed below; other codes and standards may be used if approved by ... applicable code or standard being used. The PSMO maintains a copy of all codes and standards listed below and can provide organizations with technical guidance in the design of Category A PV/S....

Ngày tải lên: 31/07/2014, 23:21

... Estimation of between family (or genotype) components of (co)variance among environments, testing of homogeneity of genetic correlations between environ- ments, and testing of homogeneity ... set and raising the issue of estimation and testing genetic parameters in experiments of this kind. REFERENCES Callanan TP (1985) Restricted maximum likelihood estimation of ... expressed as the sum of a quadratic form and the trace of parts of the inverse coefficient matrix of the mixed model equations (as described in Foulley and Quaas, 1994)....

Ngày tải lên: 09/08/2014, 18:21

... conceived of the study. REK, FPH, US, WW, and JCL participated in the design and analyses. REK and JCL led the writing, and all authors read and commented on drafts and approved the final manuscript. Competing ... the orientation of each author [20] . Two of the authors (FPHandJCL)wereinvolvedintheimplementation and evaluation of the intervention, one of the authors (US, a physician) provided clinical expertise, and ... rates, hospital admissions, length of stay, and hospital costs and improve patient functional status, quality of life, and compliance with care recommendations [8-11]. However, most of these studies were...

Ngày tải lên: 10/08/2014, 10:23

... those of humans, and have metabolic and physiologic similarities with humans. They are an appropriate animal model [34] for study of the pathogenicity [20,35] and transmissibility [36,37] of influ- enza ... contributions RST helped design and assemble the NBIES, established and protocols for inha- lation exposure studies, helped with calculations, led efforts on the testing and validation of the NBIES, assisted ... interpretation, and co-wrote the manuscript; WAS assisted with the assembly, testing, and validation of the sys- tem, and oversaw animal work; DED assisted with program management, in- vitro virus work, and...

Ngày tải lên: 12/08/2014, 04:20

... version of this manuscript. Authors are also grateful to Laurent Espinat and Nicolas Collanges f or the d aily care of the fish and sampling, Marc Vandeputte for his great help in data analyses, Sandrine ... Guillou for selection and management of the clone breeders, Amandine Launay for verifying the homozygous status of each breeder, and Marie Aurenche for her h elp during the planning of the experimental ... as replicates of the same animal. The genetic and phenotypic components of CI, RFI, and indirect criteria were assessed with Asreml, using a model including clone as random effect and tank as fixed...

Ngày tải lên: 14/08/2014, 13:21

Ngày tải lên: 24/08/2014, 11:27

Ngày tải lên: 28/09/2014, 23:27

Ngày tải lên: 28/09/2014, 23:27

Ngày tải lên: 24/10/2014, 17:26

Ngày tải lên: 24/10/2014, 21:59

Ngày tải lên: 13/11/2014, 09:31

Ngày tải lên: 13/11/2014, 10:54