In this paper, a constant of motion of charged particle motion in
homogeneous electromagnetic field is derived from Newton's equations and the
characteristics of partial differential equation, the related
Lagrangian is also given by means of the obtained constant of motion. By
discussing the Lie symmetry for this classical system, this paper
obtains the general
expression of the conserved quantity. It is shown that the conserved
quantity is the same as the constant of motion in essence.

A direct method to find the first integral for two-dimensional autonomous
system in polar coordinates is suggested. It is shown that if the equation
of motion expressed by differential 1-forms for a given autonomous
Hamiltonian system is multiplied by a set of multiplicative functions, then
the general expression of the first integral can be obtained. An example is
given to illustrate the application of the results.

This paper is intended to apply a potential method of integration
to solving
the equations of holonomic and nonholonomic systems. For a holonomic
system, the differential
equations of motion can be written as a system of differential equations
of first order and its fundamental partial
differential equation is solved by using the potential method of
integration. For a nonholonomic system,
the equations of the corresponding holonomic system are solved by using
the method and then the restriction of
the nonholonomic constraints on the initial conditions of motion is
added.

Based on the total time
derivative along the trajectory of the system
the definition and the criterion for a unified symmetry of nonholonomic
mechanical system with variable mass are presented in this paper. A new
conserved quantity, as
well as the Noether conserved quantity and the Hojman conserved quantity,
deduced from the unified symmetry, are also obtained. An example is given to
illustrate the application of the results.

A conclusive teleportation protocol of a d-dimensional two-particle
unknown quantum state using three d-dimensional particles in an arbitrary
pure state is proposed. A sender teleports the unknown state conclusively to
a receiver by using the positive operator valued measure(POVM) and
introducing an ancillary qudit to perform the generalized Bell basis
measurement. We calculate the optimal teleportation fidelity. We also
discuss and analyse the reason why the information on the teleported state
is lost in the course of the protocol.

In this paper, we investigate the Berry phase of two coupled arbitrary spins
driven by a time-varying magnetic field where the Hamiltonian is explicitly
time-dependent. Using a technique of time-dependent gauge transform the
Berry phase and time-evolution operator are found explicitly in the
adiabatic approximation. The general solutions for arbitrary spins are
applied to the spin-1/2\ system as an example of explanation.

In this paper a new scheme for teleporting an unknown entangled state of two
particles is proposed. To weaken the requirement for the quantum
channel, without loss of generality, two communicators only share a
non-maximally entangled two-particle state. Teleportation can be
probabilistically realized if sender performs Bell-state
measurements and Hadamard transformation and receiver introduces two
auxiliary particles, operates C-not operation, single-qubit
measurements and appropriate unitary transformations. The
probability of successful teleportation is determined by the smaller
one among the coefficients' absolute values of the quantum
channel.

In this paper a semiclassical propagator in a mixed position--momentum
space is derived in
the formalism of Maslov's multi-dimensional semiclassical theory. The
corresponding mixed van Vleck determinant is also given explicitly. The
propagator can be used to locally fix semiclassical divergences in singular
regions of configuration space. It is shown that when a semiclassical
propagator is transformed from one representation to another, its form is
invariant.

We propose two schemes for concentrating unknown
nonmaximally tripartite GHZ entangled states via cavity quantum
electrodynamics (QED) techniques. The
finial pure states obtained from the two schemes are shared by two or three
parties. Our schemes only require large-detuned interaction between two
driven atoms and the quantized cavity mode, which is insensitive to both the
cavity decay and thermal field, thus the schemes are well within current
experimental technology.

Some properties related to the NUT--Taub-like spacetime,
such as the surface of infinite red-shift, horizon, singularity
and the area of the NUT--Taub-like black hole are discussed.
Furthermore, the geodesics in the NUT--Taub-like spacetime are
obtained in some special cases. Specifically, the circular orbits
for a massive particle are derived, which can reduce to the cases
of the Schwarzschild spacetime and the NUT--Taub spacetime when
m^{*}=0 and m^{*}\ll M, respectively.

This paper investigates the quantum Dirac field in n+1-dimensional flat
spacetime and derives a lower bound in the form of quantum
inequality on the energy density averaged
against spacetime sampling functions. The state-independent quantum inequality
derived in the present paper is
similar to the temporal quantum energy inequality and
it is stronger for massive
field than for massless one. It also
presents the concrete results of the quantum inequality in 2 and
4-dimensional spacetimes.

This paper theoretically studies the free energy and conformational entropy of a long
polymer threading a long nanopore (n_{0}/N \ge 0.1) on external electric
field. The polymer expanded model is built in this paper, that is, a
single long polymer chain with N monomers (each of size a) threading
a pore
with n_{0} monomers can be regarded as polymer with N+n_{0} monomers
translocating a 2-dimension hole embedded in membrane. A theoretical
approach is presented which explicitly takes into account the nucleation
theory. Our calculations imply that, the structure of polymer changes
more acutely than other situation, while its leading monomer reaches the second
vacuum and its end monomer escapes the first vacuum. And it is also shown
that the length scale of polymer and pore play a very important role for
polymer translocation dynamics. The present model predicts that the
translocation time depends on the chemical potential gradient and the
property of the solvent on sides of pore to some extent.

In this paper, the stochastic resonance in a bias linear system
subjected multiplicative
and additive dichotomous noise is investigated. Using the linear-response
theory and the properties of the dichotomous noise, this paper finds
the exact expressions
for the first two moments and the signal-to-noise ratio
(SNR). It is shown that the SNR is a non-monotonic function of the
correlation time of the multiplicative and additive noise, and it varies
non-monotonously with the intensity and asymmetry of the multiplicative
noise as well as the external field frequency. Moreover, the SNR depends on
the system bias, the intensity of the cross noise between the multiplicative
and additive noise, and the strength and asymmetry of the additive noise.

The synchronization of Chua's system, whose inputs include an
unknown constant parameter, is studied in this paper. A constructive
method is applied to designing an adaptive controller, in which only
one variable information of the master system is needed. With the
action of control signals, the parameter of the slave system will
approach the corresponding unknown parameter in the master system.
At the same time, the synchronization errors will also converge to
zero asymptotically. Numerical simulations
show that the proposed theoretical approach is very effective.

In this paper a controller of pulse coupling feedback (PCF) is designed to control chaotic
systems. Control principles and the technique to select the feedback
coefficients are introduced. This controller is theoretically studied with a
three dimensional (3D) chaotic system. The artificial simulation results
show that the chaotic system can be stabilized to different periodic orbits
by using the PCF method, and the number of the periodic orbits are
2^{n}× 3^{m}p (n and m are integers). Therefore, this control method is
effective and practical.

This paper introduces a new hyperchaotic system by adding an additional
state into the third-order Liu chaotic system. Some of its basic dynamical
properties, such as the hyperchaotic attractor, Lyapunov exponent, fractal
dimension and the hyperchaotic attractor evolving into chaotic, periodic,
quasi-periodic dynamical behaviours by varying parameter d are studied
briefly. Various attractors are illustrated not only by computer simulation
but also by conducting an electronic circuit experiment.

The spatial distributions of the electron density and the mean electron
energy of argon radio frequency (rf) glow discharge plasma in a
plasma-enhanced chemical vapour deposition (PECVD) system have been
investigated using an established movable Langmuir probe. The results
indicate that in the axial direction the electron density tends to peak at
midway between the two electrodes while the axial variation trend of
mean electron energy is different from that of the electron density, the
mean electron energy is high near the electrodes. And the mean electron
energy near the cathode is much higher than that near the anode. This
article focuses on the radial distribution of electron density and mean
electron energy. A proposed theoretical model distribution agrees well with
the experimental one: the electron density and the mean electron energy both
increase from the centre of the glow to the edge of electrodes. This is
useful for better understanding the discharge mechanism and searching for a
better deposition condition to improve thin film quality.

A sapphire fibre thermal probe with Cr^{3+} ion-doped end is developed by
using the laser heated pedestal growth method. The fluorescence thermal
probe offers advantages of compact structure, high performance and ability
to withstand high temperature in a detection range from room temperature to
450℃. Based on the fast Fourier transform (FFT), the fluorescence
lifetime is obtained from the tangent function of phase angle of the
non-zeroth terms in the FFT result. This method has advantages such as quick
calculation, high accuracy and immunity to the background noise. This FFT
method is compared with other traditional fitting methods, indicating that
the standard deviation of the FFT method is about half of that of the Prony
method and about 1/6 of that of the log-fit method. And the FFT method is immune
to the background noise involved in a signal. So,
the FFT method is an excellent way of processing signals. In addition,
a phase-lock amplifier can effectively suppress the noise.

This paper used optical emission spectroscopy (OES) to study the gas
phase in high
power DC arc plasma jet chemical vapour deposition (CVD) during diamond films growth processes. The
results show that all the deposition parameters (methane concentration,
substrate temperature, gas flow rate and ratio of H_{2}/Ar) could strongly
influence the gas phase. C_{2} is found to be the most sensitive radical
to deposition parameters among the radicals in gas phase. Spatially resolved
OES implies that a relative high concentration of atomic H exists near the
substrate surface, which is beneficial for diamond film growth. The
relatively high concentrations of C_{2} and CH are correlated with high
deposition rate of diamond. In our high deposition rate system, C_{2} is
presumed to be the main growth radical, and CH is also believed to
contribute the diamond deposition.

The coefficient of selective reflection at oblique incidence from two-level
atoms confined between two dielectric walls is calculated in this paper.
It is found to
be related to the transient behaviour of atoms after colliding with the wall
and the distribution of the field inside the vapour corresponds to L /
\lambda , with L the thickness of the film and \lambda the incident
wavelength. We find that the sub-Doppler structure is manifest both for
normal incidence and small angle oblique incidence. It is feasible to detect
the real part of selective reflection in several cases that have not been
achieved before.

An analytic configuration interaction method based on variationally
optimized internally orthogonalized modified Laguerre orbitals is presented.
We have developed the corresponding computer code. For application, we study
the 1s2s ^{1}S isoelectronic sequence from helium to neon, and compare
with other methods. By taking into account the Eckart upper-bound theorem,
we obtained more accurate and more intuitively understandable results than
Hartree--Fock and multi-configuration Hartree--Fock reported results.

The splitting of potential energy curves for the states
$X^{2}\Pi _{3/2}$, $^{2}\Pi _{1/2}$ and $A^{2}\Sigma ^{ +}$ of
hydroxyl OH under spin--orbit coupling (SOC) has been calculated by
using the SO multi-configuration quasi-degenerate perturbation theory
(SO-MCQDPT). Their Murrell--Sorbie (M--S) potential functions have been
derived, then, the spectroscopic constants for $X^{2}\Pi _{3/2}$,$^{
2}\Pi _{1/2}$ and $A^{2}\Sigma ^{ + }$ have been derived from the
M--S function. The calculated dissociation energies for the three states are
$D_{0}$[OH($X^{2}\Pi _{3/2})$]=34966.632cm$^{-1}$,
$D_{0}$[OH($^{2}\Pi _{1/2})$]=34922.802cm$^{-1}$, and
$D_{0}$[OH($A^{2}\Sigma ^{ + })$]=17469.794cm$^{-1}$, respectively. The
vertical excitation energy $\nu [ {{ }^2\Pi _{1/2} ( {\nu = 0}
) \to {X}{ }^2\Pi _{3/2} ( {\nu = 0} )} ] =
139.6{\rm cm}^{-{\rm 1}}$. All the spectroscopic data for the
$X^{2}\Pi _{3/2}$ and $^{2}\Pi _{1/2 }$ are given for the
first time except the dissociation energy of $X^{2}\Pi _{3/2}$.

The foil-excited the spectrum of highly stripped titanium ions between
12--40~nm has been studied. Titanium ions of 80 and 120~MeV
were provided by the
HI-13 tandem accelerator at the China Institute of Atomic Energy. GIM-957
XUV-VUV monochromator was refocused to get highly-resolved spectra. Our
experimental results and the published spectral data of laser-produced
plasma show agreement in nearly all cases within \pm 0.03nm.
The spectra contained some weak or strong lines previously
unclassified. These spectral lines mainly belong to 2s2p^{2 } for TiXVIII,
2p^{3} for TiXVIII, 2s2p^{3} for TiXVII, 2p^{6}4p for Ti XII
and 2p^{6}3d for Ti XII transitions.

A mechanical model of liquid crystals (LCs) is applied to
study the polymorphism of homologous series of terphenyl compounds. With
a semi-experimental molecular orbit method, we calculate the moment of inertia
which represents the rotation state to describe the phase transition
temperature obtained from experimental data. We propose a novel
explanation of the phase sequence or polymorphism of LC materials using
the two key
parameters, the moment of inertia and critical rotational velocity. The effect
of molecular polarity on the appearance of liquid crystalline is also discussed.

The reasonable dissociation limit of the A^{1}∑^{+} state
$^{7}$LiH molecule is obtained. The accurate dissociation energy and the
equilibrium geometry of this state are calculated using a
symmetry-adapted-cluster configuration-interaction method in complete active space
for the first time. The whole potential energy curve and the dipole moment
function for theA^{1}∑^{+} state are calculated over a wide
internuclear separation range from about 0.1 to 1.4\,nm. The calculated
equilibrium geometry and dissociation energy of this potential energy curve
are of R_{\e}=0.2487\,nm and D_{\e}=1.064\,eV, respectively. The unusual negative
values of the anharmonicity constant and the vibration-rotational coupling
constant are of \textit{\omega }_{\e}\textit{\chi
}_{\e}=--4.7158cm^{ - 1} and \textit{\alpha
}_{\e}=--0.08649cm^{ -1}, respectively. The vertical excitation
energy from the ground to the
A^{1}∑^{+} state is calculated and the value is of 3.613\,eV at
0.15875nm (the equilibrium position of the ground state). The highly
anomalous shape of this potential energy curve, which is exceptionally flat
over a wide radial range around the equilibrium position, is discussed in
detail. The harmonic frequency value of 502.47cm^{1} about this state
is approximately estimated. Careful comparison of the theoretical
determinations with those obtained by previous theories about the
A^{1}∑^{+} state dissociation energy clearly shows that the present
calculations are much closer to the experiments than previous theories, thus
represents an improvement.

The basic physical characteristics of electrons accelerated by two linearly
polarized and circularly symmetric crossed Laguerre--Gaussian (LG) laser
beams with equal frequency and amplitude in vacuum are studied in detail.
The condition, under which electrons can be accelerated effectively, and the
energy gain are discussed.

PHYSICS OF GASES, PLASMAS, AND ELECTRIC DISCHARGES

Thomson scattering off a pair (electron--positron) plasma is
theoretically investigated in the collisionless and collisional
limits respectively. Our calculations show that the power spectrum of the
Thomson scattering off a collisionless pair plasma is just
proportional to the velocity distribution function of the
particles in the plasma. Collective modes in the plasma do not
have any effects on the Thomson scattering spectrum because of the
correlation between the negatively- and positively-charged particles.
In the collisional limit, the power spectrum of the Thomson
scattering presents three spikes: two peaks correspond to two
contra-propagating sound waves and one peak corresponds to an entropy
wave.

The transport of runaway electrons in a high-temperature plasma is
relatively easy to measure in a steady state experiment and a perturbation
experiment, which provides runaway electron diffusion coefficient
D_{r}. This diffusion coefficient is
determined by internal magnetic fluctuations, so it can be
interpreted in terms of a magnetic fluctuation level. The internal magnetic
fluctuation level ($\tilde {b}_{r}/B_{T} is estimated
to be about (2--4)×^{-4} in the HL-1M plasma. The
results presented here demonstrate the effectiveness of using runaway
electron transport techniques to determine internal magnetic
fluctuations. A profile of magnetic fluctuation level in the
HL-1M plasma can be estimated from D_{r}.

CONDENSED MATTER: STRUCTURAL, MECHANICAL, AND THERMAL PROPERTIES

On the basis of two-parameter formula of weak surface coupling anchoring
energy of nematic liquid crystals proposed by Zhao et al recently, the general
torque equilibrium equation and boundary conditions of the director have
been obtained and the threshold field as well as the saturation field of the
field-induced twist cell have been analysed for three kinds of
configurations, i.e. homogeneous, splay and Pi cells formed by
different rubbing conditions and pretilt angles. The results
indicated that the polar anchoring has no effect on the threshold field. It
is determined only by the twist anchoring and pretilt angle. But, the polar
anchoring and twist anchoring are coupling with each other and have a great
influence on the saturation field. The formulae for calculating the
threshold field and saturation field are given. These results will be very
useful in understanding surface physics and the design of liquid crystal
cells.

In order to compare with annealed Al--4%Cu alloys, the influence of solute concentration
on the serrated flow is investigated by solution treatment. In this paper,
some dynamic parameters, such as critical time and the ultimate tensile
strength are obtained. Moreover, the change of the strain rate range for
serrated flow in Al--4%Cu alloys prepared by annealing and quenching
heat treatments is reported too. The difference between them is attributed
to the increasing solute concentration in the bulk of the solution treated
materials.

CONDENSED MATTER: ELECTRONIC STRUCTURE, ELECTRICAL, MAGNETIC, AND OPTICAL PROPERTIES

Spectral sensitization micromechanism of cyanine dyes J-aggregate adsorbed
on the tabular and cubic AgBr microcrystals with different dye
concentrations
is studied by using picosecond time-resolved fluorescence spectroscopy, and
the dependences of electron transfer and spectral efficiency sensitization
on different conditions are analysed in detail. With the steady
spectroscopy, the wavelengths of absorption and fluorescence of J-aggregate
adsorbed on AgBr microcrystals are found to shift to red relative to dye
monomer. The spectrum of fluorescence has a red shift relative to the
absorption peak. With the time-resolved fluorescence spectroscopy, the
fluorescence decay curves of cyanine dyes J-aggregate adsorbed on the
tabular and cubic AgBr grains are found to be fitted well by a
double-exponential decay function. The fitting curves consist of a fast and
a slow component. Because of the large amplitude of the fast component, this
fast decay should be attributable mainly to the electron transfer from
J-aggregate of dye to a conduction band of AgBr.

It was reported by Shen et al that the
two-dimensional electron gas (2DEG) in an AlGaN/AlN/GaN structure showed high
density and improved mobility compared with an AlGaN/GaN structure, but the
potential of the AlGaN/AlN/GaN structure needs further exploration. By the
self-consistent solving of one-dimensional Schr\"{o}dinger--Poisson
equations, theoretical investigation is carried out about the effects of
donor density (0--1\times 10^{19}cm^{-3} and temperature
(50--500K) on the electron systems in the AlGaN/AlN/GaN and AlGaN/GaN
structures. It is found that in the former structure, since the effective
\Delta E_{c} is larger, the efficiency with which the 2DEG absorbs the
electrons originating
from donor ionization is higher, the resistance to parallel conduction is
stronger, and the deterioration of 2DEG mobility is slower as the donor
density rises. When temperature rises, the three-dimensional properties of
the whole electron system become prominent for both of the structures, but the
stability of 2DEG is higher in the former structure, which is also ascribed
to the larger effective \Delta E_{c}. The Capacitance--Voltage
(C-V) carrier density
profiles at different temperatures are measured for two Schottky diodes on
the considered heterostructure samples separately, showing obviously
different 2DEG densities. And the temperature-dependent tendency of the
experimental curves agrees well with our calculations.

The semiconductor CdSeS quantum dots (QDs) embedded in glass are analysed by
means of absorption spectra, photoluminescence (PL) spectra and
photoluminescence excitation (PLE) spectra. The peaks of absorption spectra
shift to lower energies with the size of QD increasing, which obviously
shows a quantum-size effect. Using the PLE spectra, the physical origin of
the lowest absorption peak is analysed. In PLE spectra, the lowest
absorption peak can be deconvoluted into two peaks that stem from the
transitions of 1S_{3/2}--1S_{e} and 2S_{3/2}--1S_{e} respectively.
The measured energy difference between the two peaks is found to decrease
with the size of QD increasing, which agrees well with the theoretical
calculation for the two transitions. The luminescence peak of defect states
is also analysed by PLE spectra. Two transitions are present in the PLE,
which indicates that the transitions of 1S_{3/2}--1S_{e} and 2S_{3/2}--1S_{e} are responsible for the defect states luminescence.

Single-walled carbon nanotubes (SWNTs) were synthesized by pyrolyzing
methane (CH_{4}) at a temperature of 900℃ on SiO_{2} substrates
pre-coated with iron nano-particles. Electrical contacts were fabricated
onto one of the SWNTs by using an electron beam lithography process. Coulomb
blockade and single-electron tunnelling characters were found at low
temperatures, indicating that the SWNT in-between the electrodes forms a
quantum dot. It is found that the Coulomb gap of the quantum dot is about
8.57 meV, and the factor \alpha , which converts the gate voltage to the
true electrostatic potential shift, is around 200 for this device.

We have observed the thermodynamic properties of metallic
superconductive nano-particles in the grand canonical ensemble; and the
level distribution and the level correlation between the discrete electronic
energy levels are considered in the calculation of the electronic spin
susceptibility of the ensemble numerically. The quantum effect, even--odd
effect and other special effects existing in the metallic nano-particles are
also studied in this article.

Using Monte Carlo simulations, we have investigated the classical $XY$
model on triangular lattices of ultra-thin film structures with
middle ferromagnetic layers sandwiched between two antiferromagnetic
layers. The internal energy, the specific heat, the chirality and the chiral susceptibility are
calculated in order to clarify phase transitions and critical
phenomena. From the finite-size scaling analyses, the values of critical exponents are determined.
In a range of interaction parameters, we find that
the chirality steeply goes up as temperature increases
in a temperature range; correspondingly the value of a critical exponent for this
change is estimated.

The Al film reflectors can yield a high-reflectance over a broad wavelength
region, and have been widely used in the spacecraft optical instruments for
high quality optical applications. Under the irradiation of charged
particles in the Earth radiation belt, the reflectors could be deteriorated.
In order to reveal the deterioration mechanism, the change in optical
constants of Al film reflector induced by proton radiation with 60\,keV was
studied in an environment of vacuum with heat sink. Experimental results
showed that when the radiation damage primarily occurs in the Al reflecting
film, the extinction coefficient k will gradually decrease with increasing
radiation fluence, which results in the decrease of the energies of
reflective light. Therefore, the proton radiation induced an obvious
degradation of spectral reflectance in the wavelength region from 200 to
800\,nm on the Al film reflector.

Near-normal incident infrared reflectivity spectra of (100) MgAl_{2}O_{4} spinel single crystal have been measured at different temperatures in the
frequency region between 50 and 6000cm^{-1}. Eight infrared-active
phonon modes are identified, which are fitted with the factorized form of
the dielectric function. The dielectric property and optical conductivity of
the MgAl_{2}O_{4} crystal are analysed. From TO/LO splitting, the
effective Szigeti charges and Born effective charges at different
temperatures are calculated for studying the ionicity and the effect of
polarization. Based on the relationship between the (LO--TO)_{1} splitting,
which represents the transverse and longitudinal frequencies splitting of
the highest energy phonon band in the reflectivity spectrum, and the
ionic-covalent parameter, the four main phonon modes are assigned.
MgAl_{2}O_{4}can be considered as a pure ionic crystal and its optical
characters do not change with decreasing temperature, so it may be used as a
suitable substrate for high-T_{c} superconducting thin films.

The Er^{3+}/Yb^{3+} co-doped TeO_{2}--Nb_{2}O_{5}--Li_{2}O
glass is prepared by conventional melting method, and its upconversion
spectra are measured. The intense green upconversion luminescence upon
excitation with a 976nm laser diode is observed with the naked eyes. The
dependence of luminescence intensity on the ratio of Yb^{3+}/Er^{3+}
is discussed in detail, and the relationship between the ratio of green
luminescence intensity to red luminescence intensity and the ratio of Yb^{3+}/Er^{3+} is also studied. The luminescence intensity increases with
the ratio of Yb^{3+}/Er^{3+} increasing. The ratio of Yb^{3+}/Er^{3+} plays a more important role than the concentration of Er^{3+} in determining the upconversion luminescence intensity. The ratio of
green luminescence intensity to red luminescence intensity reaches a maximum
when ratio of Yb^{3+}/Er^{3+} is 3. Thus the glass could be one of
the potential candidates for LD pumping solid-state lasers.

The polar interface optical (IO) and surface optical (SO) phonon modes and
the corresponding Fr\"{o}hlich electron--phonon--interaction Hamiltonian in a
freestanding multi-layer wurtzite cylindrical quantum wire (QWR) are derived
and studied by employing the transfer matrix method in the dielectric
continuum approximation and Loudon's uniaxial crystal model. A numerical
calculation of a freestanding wurtzite GaN/AlN QWR is performed. The results
reveal that for a relatively large azimuthal quantum number m or wave-number
k_{z} in the free z-direction, there exist two branches of IO phonon modes
localized at the interface, and only one branch of SO mode localized at the
surface in the system. The degenerating behaviours of the IO and SO phonon
modes in the wurtzite QWR have also been clearly observed for a small
k_{z} or m. The limiting frequency properties of the IO and SO modes for
large k_{z} and m have been explained reasonably from the mathematical and
physical viewpoints. The calculations of electron--phonon coupling functions
show that the high-frequency IO phonon branch and SO mode play a more
important role in the electron--phonon interaction.

8000 CROSSDISCIPLINARY PHYSICS AND RELATED AREAS OF SCIENCE AND TECHNOLOGY

In this paper the repulsive effects in the Kerr and Kerr--Newman fields are
discussed. The contributions made by all parameters of the fields and test
particles to the repulsive effects are also discussed, and the accretive
effect on interstellar dust, i.e. the distribution of dust is calculated.
The discussion is also carried out on the slow rotation of the Kerr field in
which the effect is related to the positions and velocities of the particles
and the orientations of their trajectories as well.

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