搜索结果: 136-150 共查到“理学 efficient”相关记录220条 . 查询时间(0.109 秒)
In 2007, MIT researchers announced that they had discovered a novel way of transmitting electricity without the use of wires. Now, the researchers have demonstrated that the system’s efficiency at tra...
Efficient creation of maximally entangled states by modulation of tunneling rates
entangled states modulation of tunneling rates
2010/4/16
For systems described by the two-site Bose-Hubbard Hamiltonian, we show that a sinusoidal modulation of the tunneling matrix element assists higher-order co-tunneling processes. Using this mechanism, ...
I prove that if markets are weak-form efficient, meaning current prices fully reflect all information available in past prices, then P = NP, meaning every computational problem whose solution can be v...
We give a test that can distinguish efficiently between product states of n quantum systems and states which are far from product. If applied to a state psi whose maximum overlap with a product state ...
Efficient numerical method to calculate three-tangle of mixed states
calculate three-tangle of mixed states energy function quantum information theory
2010/3/10
We demonstrate an efficient numerical method to calculate three-tangle of general mixed states. We construct a "energy function" (target function) for the three-tangle of the mixed state under certain...
Stability of RTS of efficient DMUs in DEA with fuzzy u_0 under fuzzy data
Data Envelopment Analysis Fuzzy mathematical programming
2010/9/15
An important property of production functions is the concept return to scale (RTS) as found in the literature. There are two common variations RTS in data envelopment analysis (DEA) used, constant ret...
An efficient one pot synthesis of 1,4-dihydropyridines using alumina sulfuric acid (ASA) catalyst
Hantzsch 1 4-dihydropyridines ASA catalyst one pot conversion
2010/4/8
An efficient synthetic method for 1,4-dihydropyridines has been developed using 3 or 4 component condensation reactions of aldehydes, 1,3-dicarbonyl compounds, and ammonium acetate in the presence of ...
A simple and efficient one-pot multicomponent synthesis of b-acetamido carbonyl compounds with Zn(HSO4)2 and Co(HSO4)2 as catalysts
Darking-West reaction metal catalysis acatamido carbonyl compounds
2010/4/8
Zn(HSO4)2 and Co(HSO4)2 has been used as efficient catalysts for the preparation of b-acetamido carbonyl compounds by Dakin-West reaction.
Efficient techniques for the diffusion equation subject to the specification of energy
Diffusion equation nonlocal boundary condition
2010/9/17
An efficient numerical technique is developed for the solution of the diffusion equation: ut = uxx + s(x, t), 0 < x < X, 0 < t ≤ T, subject to u(x, 0) = f(x), 0 < x < X,u(1, t) = g(t), 0 < t ≤ T and t...
Efficient implementation of inverse approach for forecasting hydrological time series using micro GA
Efficient implementation inverse approach hydrological time series micro GA
2009/12/4
This paper implements the inverse approach for forecasting hydrological time series in an efficient way using a micro-GA (mGA) search engine. The inverse approach is based on chaos theory and it invol...
Derivation of effective and efficient data set with subtractive clustering method and genetic algorithm
Derivation effective and efficient data set subtractive clustering method genetic algorithm
2009/12/4
Success of any forecasting model depends heavily on reliable historical data, among others. Data are needed to calibrate, fine tune and verify any simulation model. However, data are very often contam...
An efficient nonlinear cardinal B-spline model for high tide forecasts at the Venice Lagoon
nonlinear cardinal B-spline model high tide forecasts Venice Lagoon
2009/11/9
An efficient class of nonlinear models, constructed using cardinal B-spline (CBS) basis functions, are proposed for high tide forecasts at the Venice lagoon. Accurate short term predictions of high ti...
Efficient estimation of time-mean states of ocean models using 4D-Var and implicit time-stepping
Efficient estimation time-mean states ocean models 4D-Var implicit time-stepping
2009/11/3
We propose an efficient method for estimating a time-mean state of an ocean model subject to given observations using implicit time-stepping. The new method uses (i) an implicit implementation of the ...
The research on the highly efficient calculation method of 3-D frequency-domain Green function
frequency-domain Green function numerical approximation Gaussian integral
2011/9/13
The traditional calculation method of frequency-domain Green function mainly utilizes series or asymptotic expansion to carry out numerical approximation, however, this method requires very careful zo...
Efficient Synthesis of (S)-1-(2-chlorophenyl)ethanol in the Submerged Culture of Alternaria alternata Isolate
Alternaria alternata bioconversion biocatalysis 2-chloroacetophenone fermentation optimization
2009/9/15
99%. Under the optimum conditions, after 54 h reaction time, 24 mmol/L 2 from 30 mmol/L 1 could be produced. As a result, the submerged fer-mentation of A. alternata EBK-8 was found to be suitable for...