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Questions related from Viktor Vladimir Chistyakov
In other words, the excitons formed by a hole with an energy below the bottom of the valence band and an electron with an energy above the ceiling of the conduction band. No matter direct or not...
09 December 2024 1,368 1 View
There was observed a temperature hysteresis of a resistance of gas sensing thin PdO films received by thermal oxidation and used in regime of long time (5 min) harmonic temperature modulation...
16 November 2024 5,907 1 View
Well known is te relation between Young and shear moduli within region of proportional ity G=E/(2+v), v -a Poisson ratio. The formula implies that axial strain and shear angle are little enough...
11 September 2024 7,211 1 View
As for perpendicular axis of maximal moment it is well studied. In the actual case of buckling of I-beam I didn't find the plot of tangent stresses in a section when the tangent load Q is...
28 August 2024 3,154 0 View
The theory says that been compressed a column beam buckles from trivial rectilinear shape to the arc at axial load F>F1, then the shape becomes of S-type at F>F2, then with 3 halfperiods at F>F3...
04 July 2024 7,686 0 View
The dopant concentration is Nd(x) in transiton domain 0
21 February 2024 7,466 1 View
This problem is relatively easy solved when stiffeners are identical and obeying rotational Hooke's law, i.e., are linear. The case of different but comparable with each other stiffeness...
01 October 2023 5,310 1 View
I have derived the relationship between an arbitrary compressive strain-stress diagram and critical buckling stress for the console of a given slendernes 'lamda'. Now I need to verify the plots...
02 September 2023 7,873 0 View
To diagonalize a covariance matrix 500+x500+ is extremely difficult, almost impossible. To maximize a mean squared projection of the vectors on some direction a=(a1,a2,.....a500+) You are to solve...
12 March 2022 4,053 4 View
I use StatSoft Statistica 12 for Data Processing and developing the algorithm of building of confidence interval. And I need test arrays of pseudo random numbers to check the algorithm efficiency.
13 November 2019 692 2 View
Spherical symmetry doesn't permit the field configuration different from radial one. From the other side the circulation theorem implies tangent field with non zero rotor. The solution of...
27 March 2019 1,390 4 View
The magnetic induction of round curl with current J depends on radial variable r as B := (R*J/(2*Pi))*mu0*ln((sqrt(r)+sqrt(R))/(-sqrt(r)+sqrt(R)))/((R+r)*sqrt(R*r)) where R is the ring radius. The...
11 December 2018 1,877 1 View
These two values should be interconnected throufg integral of collisions. But I can not find a clear formula.
03 November 2018 3,819 1 View
Let's consider 1D conductor, say, quantum wire (QW) with smooth walls and therefore negligible carriers' scattering on them and other centers. (This is possible in QW in which the drift mobility...
25 October 2017 606 0 View
This is dz(x,t)/dt+(dz/dx)*Acos(t+phi)=-Bcos(t+phi)*x*(t-i),z(x,0)=1,i^2=-1
07 January 2016 4,884 7 View
In Newtons II law the force F acting on a body may depend on time, position and velocity but not acceleration. Otherwise the parallelogram principle doesn't operate for partial accelerations. And...
11 August 2014 2,279 8 View
When minimizing by real number q a value of lost function L=(A-qB)^2/A^2 with the A as the reference vector we receive Lmin=(1-(AB)^2/A2*B^2) where X^2=X1^2+...Xn^2, XY=X1Y1+...XnYn. Physical...
01 January 1970 1,205 3 View
For example tunneling effect or over-barrier reflection of particle, both have no classical analogues i.e. adequate description of the particle behavior in frames of classical physics.On the...
01 January 1970 2,859 0 View
The four conducting spheres of equal radii r were charged and arranged and interconnected firmly by 2 linear rigid wires with common switcher S according to the Pic.(see attach.). At what...
01 January 1970 1,485 6 View
