排序方式: 共有47条查询结果,搜索用时 15 毫秒
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E. Cattelain L. Bliecq C. H. Troy P. Fr. Sharp A. Schneck W. Strack und G. Roeder 《Fresenius' Journal of Analytical Chemistry》1931,83(5-6):236-238
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Optimization of enzymatic biochemical logic for noise reduction and scalability: how many biocomputing gates can be interconnected in a circuit? 总被引:2,自引:0,他引:2
Privman V Strack G Solenov D Pita M Katz E 《The journal of physical chemistry. B》2008,112(37):11777-11784
We report an experimental evaluation of the "input-output surface" for a biochemical AND gate. The obtained data are modeled within the rate-equation approach, with the aim to map out the gate function and cast it in the language of logic variables appropriate for analysis of Boolean logic for scalability. In order to minimize "analog" noise, we consider a theoretical approach for determining an optimal set for the process parameters to minimize "analog" noise amplification for gate concatenation. We establish that under optimized conditions, presently studied biochemical gates can be concatenated for up to order 10 processing steps. Beyond that, new paradigms for avoiding noise buildup will have to be developed. We offer a general discussion of the ideas and possible future challenges for both experimental and theoretical research for advancing scalable biochemical computing. 相似文献
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Luminescence and thermoluminescence properties of nominally pure LiF and CaWO4 crystals are compared with those of the crystalline system LiF/CaWO4. Evidence is found which clearly indicates that from the various emission bands of CaWO4 crystals only the blue one is of intrinsic nature. Luminescence decay measurements are reported. Within the spectral range of the blue tungstate band in LiF/CaWO4 four different decay times are obtained. This result is interpreted as arising from WO2-4 luminescence centres with different environments in the LiF host. 相似文献
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Discontinuous changes of the lattice parameters at the Mott metal-insulator transition are detected by high-resolution dilatometry on deuterated crystals of the layered organic conductor kappa-(BEDT-TTF)(2)Cu[N(CN)(2)]Br. The uniaxial expansivities uncover a striking and unexpected anisotropy, notably a zero effect along the in-plane c axis along which the electronic interactions are relatively strong. A huge thermal expansion anomaly is observed near the end point of the first-order transition line enabling us to explore the critical behavior with very high sensitivity. The analysis yields critical fluctuations with an exponent alpha approximately 0.8+/-0.15 at odds with the novel criticality recently proposed for these materials [Kagawa et al., Nature (London) 436, 534 (2005)]. Our data suggest an intricate role of the lattice degrees of freedom in the Mott transition for the present materials. 相似文献
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Berger R Cheng Y Förch R Gotsmann B Gutmann JS Pakula T Rietzler U Schärtl W Schmidt M Strack A Windeln J Butt HJ 《Langmuir : the ACS journal of surfaces and colloids》2007,23(6):3150-3156
In this paper, we describe atomic force microscope (AFM) friction experiments on different polymers. The aim was to analyze the influence of the physical architecture of the polymer on the degree and mode of wear and on the wear mode. Experiments were carried out with (1) linear polystyrene (PS) and cycloolefinic copolymers of ethylene and norbornene, which are stabilized by entanglements, (2) mechanically stretched PS, (3) polyisoprene-b-polystyrene diblock copolymers, with varying composition, (4) brush polymers consisting of a poly(methyl methacrylate) (PMMA) backbone and PS side chains, (5) PMMA and PS brushes grafted from a silicon wafer, (6) plasma-polymerized PS, and (7) chemically cross-linked polycarbonate. For linear polymers, wear depends critically on the orientation of the chains with respect to the scan direction. With increasing cross-link density, wear was reduced and ripple formation was suppressed. The cross-linking density was the dominating material parameter characterizing wear. 相似文献
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W. Scheele O. Wo H. Reihlen Strack F. H. Müller E. Rimann Hans H. Pfeiffer Wojahn Haupt R. E. Liesegang 《Colloid and polymer science》1943,104(1):125-129
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Klaus-Günther Strack 《Numerische Mathematik》1986,48(2):221-237
Summary In this paper we give bounds for the error constants of certain classes of stable implicit finite difference methods for first order hyperbolic equations in one space dimension. We consider classes of methods that user downwind ands upwind points in the explicit part andR downwind andS upwind points in the implicit part, respectively, and that are of optimal orderp=min (r+R+s+S, 2(r+R+1), 2(s+S)).In some cases the error constant of interpolatory methods [5] can be improved. The results are proved via the order star technique. They are further used to determine methods of optimal order that are stable. 相似文献
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