Results 221 to 230 of about 122,616 (284)
ON SIEVE METHODS AND SOME OF THEIR APPLICATIONS
, 2005 Let \(v_k\) be a positive number such that between \(x - x^{1/v_k}\) and \(x\) for sufficiently large \(x\) there exists an integer with at most \(k\) prime factors. The author proves that \(k = v + w\) where \(v\) \((= v_k)\) is an integer and \(w\) is the least integer satisfying \[ \log [(5v-w)/(w+5)] \leq 1,3259 (w - 0,1665).
YUAN WANG
+12 more sources
Journal of Plant Biology, 2021 Vascular system plays an important role in plant growth and survival under dynamic environmental conditions. As part of vascular tissues, the phloem consists of phloem sieve elements (SEs) and companion cells (CCs). In the root apical meristem of Arabidopsis thaliana, CCs are generated by the asymmetric cell divisions (ACDs) of procambial cells ...
Hyoujin Kim, Ji-Young Lee
openaire +2 more sources
ChemInform, 2001 AbstractChemInform is a weekly Abstracting Service, delivering concise information at a glance that was extracted from about 100 leading journals. To access a ChemInform Abstract of an article which was published elsewhere, please select a “Full Text” option. The original article is trackable via the “References” option.
J. Sterte +7 more
openaire +2 more sources
THE 'LARGE SIEVE' METHOD AND ITS APPLICATIONS IN THE THEORY OF NUMBERS
Russian Mathematical Surveys, 1966 CONTENTSNotationIntroduction § 1. The essence of the method. First applications § 2. The probabilistic interpretation of the 'large sieve' § 3. Composite moduli. Application to binary additive problems § 4. The non-vanishing of L-functions near the line σ = 1 § 5.
M. B. Barban
openaire +3 more sources
The Method of Sieves. A Survey of Recent Applications.
, 1985 Abstract : The method of sieves is a technique of nonparametric estimation in which estimators are restricted by an increasing sequence of subsets of the parameter space with the subsets indexed by the sample size. The need for this technique arises in situations where the parameter space is too large for the existence or consistency of unconstrained ...
Ian W. McKeague
openaire +2 more sources
Application of the seed-film method for the preparation of structured molecular sieve catalysts
Catalysis Today, 2001 Abstract The seed-film method has been applied for the preparation of various materials of potential interest as structured molecular sieve catalysts. The method has proven to be very flexible and allows for the reproducible preparation of a number of molecular sieve–substrate combinations as well as the control of the materials’ properties of ...
Johan Sterte +7 more
openaire +2 more sources
Journal of Chemical Information and Computer Sciences, 1997 A pattern inventory is developed for the enumeration of stable stereo and position isomers of any series of deoxycyclitols with the formula (CH2)p(CHOH)q where p(CH2) and q(CHOH) groups form a ring system of size n = (p + q). The counting method consists of two steps: firstly the application of POLYA's counting theorem gives the number of permutation ...
Robert Martin Nemba, Maurice Fah
openaire +2 more sources
Journal of Porous Materials, 2002 AlPO4-5 and AlPO4-11 were synthesized by dry-gel conversion (DGC) method. Steam-assisted conversion (SAC) and vapor-phase transport (VPT) techniques were applied for this purpose. The synthesis was successful in presence of a certain minimum amount of external bulk water, without which the crystallization failed.
Rajib Bandyopadhyay +3 more
openaire +2 more sources
Journal of Membrane Science, 1991 Abstract A technique for the determination of the pore size distribution of molecular sieve materials is described. This method is based on the determination of the microporous volume accessible to molecular probes of different sizes. The method is used to follow the molecular sieve structure which develops during the pyrolysis of polysilastyrene ...
Eric J. Grosgogeat +3 more
openaire +2 more sources