Generalized Solution of One-Dimensional Radial Fin by Frobenius Method with Application on Finned Electric Motor

2022 ◽  
pp. 9-21
Author(s):  
Elcio Nogueira
Keyword(s):  
Electric Motor ◽  
Generalized Solution ◽  
Frobenius Method ◽  
One Dimensional

Derivation of the Torque—Speed Characteristic of a Reaction Turbine

1993 ◽  
Vol 207 (3) ◽  
pp. 165-172 ◽  
Author(s):  
D Levy
Keyword(s):  
Electric Motor ◽  
Control Engineer ◽  
Optimal Operation ◽  
Dimensional Vector ◽  
Variable Flow ◽  
One Dimensional ◽  
Smooth Flow ◽  
Flow Situation ◽  
Starting Torque ◽  
Speed Characteristic

When a reaction turbine is coupled to a generator or when an electric motor is coupled to a pump, the torque–speed characteristic of the runner needs to be known so that the control engineer can analyse the system for stability and optimal operation. The currently used one-dimensional vector analysis applies only where there is smooth flow in the inlet of the machine. This paper modifies and extends this analysis to apply to a variable flow situation which occurs when the load on the machine is not equal to the optimal specified load. Runaway speed and starting torque of the machine can also be calculated using this analysis.

scholarly journals TASK ON LONGITUDINAL VIBRATIONS OF A ROD WITH DYNAMIC BOUNDARY CONDITIONS

2017 ◽  
Vol 20 (3) ◽  
pp. 9-19
Author(s):  
A.B. Beylin ◽  
L.S. Pulkina
Keyword(s):  
Mathematical Model ◽  
Boundary Conditions ◽  
Existence And Uniqueness ◽  
Longitudinal Vibration ◽  
Generalized Solution ◽  
Dynamic Boundary Conditions ◽  
Longitudinal Vibrations ◽  
One Dimensional ◽  
Dynamic Boundary

In this paper, one-dimensional longitudinal vibration of a solid rod fixed at the ends by means of local masses and springs is studied. As a mathematical model we use Rayleigh rod. The existence and uniqueness of a generalized solution are proved.

scholarly journals ON A BOUNDARY VALUE PROBLEM WITH NONLOCAL IN TIME CONDITIONS FOR A ONE-DIMENSIONAL HYPERBOLIC EQUATION

2017 ◽  
Vol 19 (6) ◽  
pp. 31-39
Author(s):  
S.V. Kirichenko
Keyword(s):  
Initial Data ◽  
Boundary Value Problem ◽  
Hyperbolic Equation ◽  
Existence And Uniqueness ◽  
Boundary Value ◽  
Integral Form ◽  
Generalized Solution ◽  
One Dimensional

In this article, the boundary value problem for hyperbolic equation with nonlocal initial data in integral form is considered. Existence and uniqueness of generalized solution are proved.

A one-dimensional self-gravitating stellar gas

1966 ◽  
Vol 25 ◽  
pp. 46-48 ◽  
Author(s):  
M. Lecar
Keyword(s):  
Gravitational Field ◽  
Phase Space ◽  
Motion Picture ◽  
Space Distribution ◽  
Two Dimensional ◽  
One Dimensional ◽  
Phase Space Distribution ◽  
Dimensional Phase Space ◽  
The Mean

“Dynamical mixing”, i.e. relaxation of a stellar phase space distribution through interaction with the mean gravitational field, is numerically investigated for a one-dimensional self-gravitating stellar gas. Qualitative results are presented in the form of a motion picture of the flow of phase points (representing homogeneous slabs of stars) in two-dimensional phase space.

Electron-Mirror Microscopic Aspects of Ferroelectric Domains of BaTiO3 And Ca2Sr (C2H5CO2)6

1970 ◽  
Vol 28 ◽  
pp. 478-479
Author(s):  
Teruo Someya ◽  
Jinzo Kobayashi
Keyword(s):  
Surface Layer ◽  
Electric Fields ◽  
Quantitative Study ◽  
Recent Progress ◽  
Ferroelectric Domain ◽  
Resolving Power ◽  
Surface Pattern ◽  
Crystal Surfaces ◽  
One Dimensional ◽  
Ferroelectric Domains

Recent progress in the electron-mirror microscopy (EMM), e.g., an improvement of its resolving power together with an increase of the magnification makes it useful for investigating the ferroelectric domain physics. English has recently observed the domain texture in the surface layer of BaTiO3. The present authors ) have developed a theory by which one can evaluate small one-dimensional electric fields and/or topographic step heights in the crystal surfaces from their EMM pictures. This theory was applied to a quantitative study of the surface pattern of BaTiO3).

Structure and function of neural networks in the retina

1988 ◽  
Vol 46 ◽  
pp. 26-27
Author(s):  
Peter Sterling
Keyword(s):  
Ganglion Cells ◽  
Three Dimensional ◽  
Structure And Function ◽  
Synaptic Connections ◽  
Visual Axis ◽  
One Dimensional ◽  
Cat Retina ◽  
Ultrathin Sections ◽  
And Function ◽  
Insight Into

The synaptic connections in cat retina that link photoreceptors to ganglion cells have been analyzed quantitatively. Our approach has been to prepare serial, ultrathin sections and photograph en montage at low magnification (˜2000X) in the electron microscope. Six series, 100-300 sections long, have been prepared over the last decade. They derive from different cats but always from the same region of retina, about one degree from the center of the visual axis. The material has been analyzed by reconstructing adjacent neurons in each array and then identifying systematically the synaptic connections between arrays. Most reconstructions were done manually by tracing the outlines of processes in successive sections onto acetate sheets aligned on a cartoonist's jig. The tracings were then digitized, stacked by computer, and printed with the hidden lines removed. The results have provided rather than the usual one-dimensional account of pathways, a three-dimensional account of circuits. From this has emerged insight into the functional architecture.

Intergrowth of modulated structures in high Tc Bi-Sr-Ca-Cu-O superconductors

1990 ◽  
Vol 48 (4) ◽  
pp. 76-77
Author(s):  
A.Q. He ◽  
G.W. Qiao ◽  
J. Zhu ◽  
H.Q. Ye
Keyword(s):  
Twin Structure ◽  
Modulated Structure ◽  
High Tc ◽  
One Dimensional ◽  
Lattice Constants ◽  
Superconducting Phases ◽  
Modulated Structures ◽  
Layer Structures

Since the first discovery of high Tc Bi-Sr-Ca-Cu-O superconductor by Maeda et al, many EM works have been done on it. The results show that the superconducting phases have a type of ordered layer structures similar to that in Y-Ba-Cu-O system formulated in Bi2Sr2Can−1CunO2n+4 (n=1,2,3) (simply called 22(n-1) phase) with lattice constants of a=0.358, b=0.382nm but the length of c being different according to the different value of n in the formulate. Unlike the twin structure observed in the Y-Ba-Cu-O system, there is an incommensurate modulated structure in the superconducting phases of Bi system superconductors. Modulated wavelengths of both 1.3 and 2.7 nm have been observed in the 2212 phase. This communication mainly presents the intergrowth of these two kinds of one-dimensional modulated structures in 2212 phase.

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