搜索结果: 1-12 共查到“理学 sieve”相关记录12条 . 查询时间(0.296 秒)
The perfect atomic-scale sieve
perfect atomic-scale sieve
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2019/10/8
Graphene is perfectly selective to protons and blocks even smallest ions like chlorine, University of Manchester research shows. This result will be important for the development of graphene-based mem...
The perfect atomic-scale sieve
perfect atomic-scale sieve
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2019/10/8
Graphene is perfectly selective to protons and blocks even smallest ions like chlorine, University of Manchester research shows. This result will be important for the development of graphene-based mem...
HILBERT’S IRREDUCIBILITY THEOREM AND THE LARGER SIEVE
HILBERT IRREDUCIBILITY THEOREM LARGER SIEVE
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2015/8/26
We describe an explicit version of Hilbert’s irreducibility theorem using a generalization of Gallagher’s larger sieve. We give applications to the Galois theory of random polynomials, and to the imag...
When the sieve works
sieve works Number Theory Combinatorics
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2012/5/25
We are interested in classifying those sets of primes P such that when we sieve out the integers up to x by the primes in P^c we are left with roughly the expected number of unsieved integers. In part...
A new two-dimension sieve method and the proof of the Goldbach's conjecture
sieve Goldbach conjecture
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2011/9/21
This paper advanced a new two-dimension sieve method of using some deleted lines to sum formulae with some odd composites in formula columns for every even number >6, and proved a stronger Goldbach\&#...
Sieve methods in group theory I: Powers in Linear groups
Sieve Property-T Powers Linear groups Finite groups of Lie type
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2011/9/14
Abstract: A general sieve method for groups is formulated. It enables one to "measure" subsets of a finitely generated group. As an application we show that if $\Gamma$ is a finitely generated non vir...
Hollow cone sieve for top
Hollow cone sieve for top Higgs field
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2011/4/7
Hollow cone sieve for top 。
Sieve in expansion
Sieve expansion
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2011/1/21
This report presents recent works extending sieve methods, from their classical setting, to
new situations characterized by the targeting of sets with exponential growth, arising often
from discrete...
Sifting Limits for the \Lambda^2\Lambda^- Sieve
Sifting Limits \Lambda^2\Lambda^- Sieve
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2011/2/22
Sifting limits for the 2 sieve, Selberg's lower bound sieve, are computed for integral dimensions 1 < 10. The evidence strongly suggests that for all 3 the 2 sieve is s...
Ⅰ型区间删失情形下部分线性模型Sieve极大似然估计渐近性质
部分线性模型 区间删失 Sieve 渐近有效性
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2007/12/10
本文在响应变量的观测值为Ⅰ型区间删失数据的情形下，讨论部分线性模型Ｓｉｅｖｅ极大似然估计的渐近性质．在一定条件下证明了该估计具有强相合性；参数分量的估计具有渐近正态性，并且是渐近有效的；非参数分量估计达到了最优弱收敛速度．
KIT-1介孔分子筛的化学修饰及吸附性能（Chemical Modification and Adsorption of the Pure Silica Mesoporous Molecular Sieve KIT-1 ）
介孔分子筛 KIT-1 化学修饰 吸附容量 水热稳定性
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2010/8/25
The pure silica mesoporous molecular sieve (KIT-1) was chemically modified using both organic and inorganic precursors and characterized using FTIR, XRD, MAS NMR, TG-DSC and physical adsorption-desorp...
DNA Sieve: Nanoscale Pores Can Be Tiny Analysis Labs(图)
biological molecules DNA toxins
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2007/5/14
May 10, 2007，Imagine being able to rapidly identify tiny biological molecules such as DNA and toxins using less than a drop of salt water in a system that can fit on a microchip. It’s closer than you ...