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排序方式: 共有103条查询结果,搜索用时 15 毫秒
1.
Manfred Goebel 《Monatshefte für Mathematik》1992,113(2):107-119
The paper is devoted to superposition operators acting between Hölder spaces, for which we prove continuity properties and Fréchet-differentiability under assumptions being weaker than those so far known in the literature. 相似文献
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Chen K Li CM Zhang Q Chen YA Goebel A Chen S Mair A Pan JW 《Physical review letters》2007,99(12):120503
We report an experimental realization of one-way quantum computing on a two-photon four-qubit cluster state. This is accomplished by developing a two-photon cluster state source entangled both in polarization and spatial modes. With this special source, we implemented a highly efficient Grover's search algorithm and high-fidelity two-qubit quantum gates. Our experiment demonstrates that such cluster states could serve as an ideal source and a building block for rapid and precise optical quantum computation. 相似文献
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A. Lugstein W. Brezna M. Stockinger B. Goebel L. Palmetshofer E. Bertagnolli 《Applied Physics A: Materials Science & Processing》2003,76(7):1035-1039
This paper presents a novel technology of lateral profile engineering addressing nonuniform-channel MOS devices. For the first
time MOS devices with highly nonuniform 2-D doping profiles are achieved by post-processing implantation of channel doping
peaks. By reducing the thermal budget to a single anneal/activation step, any unintentional broadening or washout of the doping
profiles is avoided. We demonstrate the feasibility of this scheme in terms of trap generation and damage, and the appropriateness
of this approach to explore nonuniform-channel MOS devices. As predicted by simulations, the Ion/Ioff ratio of MOS devices is greatly improved by the introduction of peaking channel dopings. These devices are much less prone
to hot-carrier degradation due to reduced electric fields, are less affected by drain induced barrier lowering (DIBL) and
exhibit improved resistance to punch through, thus being easier to scale into the ultra-deep-submicron regime.
Received: 21 August 2002 / Accepted: 21 August 2002 / Published online: 12 February 2003
RID="*"
ID="*"Corresponding author. Fax: +43-1/58801-36291, E-mail: alois.lugstein@tuwien.ac.at 相似文献
9.
The behavior of supersonic mixing layers under three conditions has been examined by schlieren photography and laser Doppler velocimetry. In the schlieren photographs, some large-scale, repetitive patterns were observed within the mixing layer; however, these structures do not appear to dominate the mixing layer character under the present flow conditions. It was found that higher levels of secondary freestream turbulence did not increase the peak turbulence intensity observed within the mixing layer, but slightly increased the growth rate. Higher levels of freestream turbulence also reduced the axial distance required for development of the mean velocity. At higher convective Mach numbers, the mixing layer growth rate was found to be smaller than that of an incompressible mixing layer at the same velocity and freestream density ratio. The increase in convective Mach number also caused a decrease in the turbulence intensity (
u/U).List of symbols
a
speed of sound
-
b
total mixing layer thickness between U
1 – 0.1 U and U
2 + 0.1 U
-
f
normalized third moment of u-velocity, f u3/(U)3
-
g
normalized triple product of u2
, g u2/(U)3
-
h
normalized triple product of u
2, h u
2/(U)3
-
l
u
axial distance for similarity in the mean velocity
-
l
u
axial distance for similarity in the turbulence intensity
-
M
Mach number
-
M
c
convective Mach number (for
1 =
2), M
c (U
1 – U
2)/(a
1 + a
2)
-
P
static pressure
-
r
freestream velocity ratio, r U
2/U
1
-
Re
unit Reynolds number, Re U/
-
s
freestream density ratio, s 2/1
-
T
t
total temperature
-
u
instantaneous streamwise velocity
-
u
deviation of u-velocity, uu – U
-
U
local mean streamwise velocity
-
U
1
primary freestream velocity
-
U
2
secondary freestream velocity
-
average of freestream velocities, (U
1 + U
2)/2
-
U
freestream velocity difference, U U
1 – U
2
-
instantaneous transverse velocity
-
v
deviation of -velocity, – V
-
V
local mean transverse velocity
-
x
streamwise coordinate
-
y
transverse coordinate
-
y
0
transverse location of the mixing layer centerline
-
ensemble average
-
ratio of specific heats
-
boundary layer thickness (y-location at 99.5% of free-stream velocity)
-
similarity coordinate, (y – y
0)/b
-
compressible boundary layer momentum thickness
-
viscosity
-
density
-
standard deviation
-
dimensionless velocity, (U – U
2)/U
- 1
primary stream
- 2
secondary stream
A version of this paper was presented at the 11th Symposium on Turbulence, October 17–19, 1988, University of Missouri-Rolla 相似文献
10.