Fabric thickness dynamic measurement during a classic uniaxial tensile test

An understanding of fabric tensile behavior is essential for the development of new technical textile applications and for realistic simulations. Indeed, mechanical fabric properties, such as thickness evolution, are very important in classic uniaxial tensile tests. The authors have developed a very lightweight inductive sensor to measure the thickness evolution during such a tensile test. The main difficulty of this study had been to find out the most suitable sensor for the specific conditions of textile tensile tests. Three different plainwoven fabrics have been tested and results are discussed.     

熔盐电解LiCl-KCl-AlCl3-La2O3共析出制备Al-Li-La合金

研究了LiCl-KCl-AlCl3-La2O3熔盐体系中共析出制备Al-Li-La合金的可行性。研究表明,在LiCl-KCl熔盐中,AlCl3将La2O3氯化为LaCl3,使电解制备Al-Li-La合金顺利进行。借助循环伏安法对熔盐体系的电化学行为进行分析发现,对质量比为45∶45∶5∶2的LiCl-KCl-AlCl3-La2O3熔盐,当阴极电流密度大于0.25 A/cm2,可以实现Al、Li和La的共析出。通过研究电解温度、阴极电流密度和电解时间对合金组成的影响,得到了较佳的电解参数:电解温度650℃,在LiCl-KCl混合熔盐中加入质量分数为5%的AlCl3和2%的La2O3,阴极电流密度12.5 A/cm2,电解时间1 h。X射线衍射对合金分析测试表明,合金主要由Al2La和βLi组成。     

Development of Stimulus‐Responsive Degradable Film via Codeposition of Dopamine and Cystamine

Herein, we report a degradable film that can be coated on various substrates by the codeposition of dopamine and cystamine. The thickness of the resulting film (pDC) varies depending on the initial ratio of dopamine/cystamine dissolved in a solution; the thickest film (ca. 60 nm) is obtained under optimized codeposition conditions. Selective degradation of pDC occurs in the presence of tris(2‐carboxyethyl)phosphine (TCEP), the reaction kinetics of which are highly dependent on the TCEP concentration. For further application as a drug‐delivery platform, doxorubicin can be loaded within the pDC film, which is released actively under film degradation in response to TCEP. We expect that the developed pDC film will be a useful tool for developing drug delivery cargo, antibacterial surface, and cell surface coating for various biomedical applications.     

A variety of poly(m-benzamide)s with low polydispersities from inductive effect-assisted chain-growth polycondensation

Chain-growth polycondensation of 3-(alkylamino)benzoic acid alkyl esters 1 was investigated for obtaining poly(m-benzamide)s with defined molecular weights and low polydispersities. Polymerization conditions were first studied to find that ethyl 3-(octylamino)benzoate ( 1b ) polymerized in a chain polymerization manner in the presence of lithium 1,1,1,3,3,3-hexamethyldisilazide (LiHMDS) as a base and phenyl 4-methylbenzoate ( 2b ) as an initiator in THF at 0 °C. The molecular weight of the polymer was controlled by the feed ratio of monomer to initiator. The polymerization of 1c – i with a variety of N-alkyl groups was then carried out under the established conditions to yield well-defined poly(m-benzamide)s, which showed higher solubility than those of the corresponding poly(p-benzamide)s. Furthermore, the 4-octyloxybenzyl group on the amide nitrogen in poly 1i was removed by treatment with trifluoroacetic acid (TFA) to give N-unsubstituted poly(m-benzamide) (poly 1j ) with a low polydispersity, which is soluble in DMAc and DMSO, contrary to the para-substituted counterpart. © 2006 Wiley Periodicals, Inc. J Polym Sci Part A: Polym Chem 44: 4990–5003, 2006     

On Quantum Stochastic Differential Equations as Dirac Boundary-Value Problems

We prove that a single-jump unitary quantum stochastic evolution is unitarily equivalent to the Dirac boundary-value problem on the half-line in an extended space. It is shown that this solvable model can be derived from the Schrödinger boundary-value problem for a positive relativistic Hamiltonian on the half-line as the inductive ultrarelativistic limit corresponding to the input flow of Dirac particles with asymptotically infinite momenta. Thus the problem of stochastic approximation can be reduced to a quantum mechanical boundary-value problem in the extended space. The problem of microscopic time reversibility is also discussed in the paper.     

诱导极限中的弱紧集

本文研究了诱导极限中的弱集与紧集，我们给出了诱导极限ｉｎｄｉｍ Ｅｎ中每个弱紧集含于且弱紧于某Ｅｎ的一些条件。     

Sequential completeness and regularity of inductive limits of webbed spaces

Any inductive limit of bornivorously webbed spaces is sequentially complete iff it is regular.     

用连续归纳法证明实数系中的定理

引入实数的连续归纳法,并利用实数连续归纳法证明了实数系中的C auchy收敛准则;给出并证明了实数连续归纳法的另一种形式,利用新形式的连续归纳法证明单调有界定理.     

FEATURES OF BIOECONOMICS MODELS FOR THE OPTIMAL MANAGEMENT OF A FISHERY EXPLOITED BY TWO DIFFERENT FLEETS

ABSTRACT. After the extension of the Exclusive Economic Zone, in 1977, to 200 miles, most fish stocks came under jurisdiction of the adjacent coastal states. This development opened prospects of effective management of the open sea fisheries. Coastal states have the right to plan out the operation of so-called by Clarke and Munro “distant water fishing nations” from their Exclusive Economic Zone. Under some arrangements, a foreign fleet is allowed to harvest the resource in the Exclusive Economic Zone area. Clarke and Munro, in [1987] and [1991], focus on the issue of optimum terms and conditions of access and, in doing so, built a multiobjective model. The main goal of the present work is the development of a more general model including more variables and parameters related to the presence of a domestic fleet as well as a distant water fishing nation. The main difficulty resides in sharing the harvesting between the two fleets. The study responds to the realistic problemof coastal states who own enough resource stocks to allow harvesting by several kinds of fleets. Two optimal scenarios are developed, in each of them a solution is given.     

Electro-Acoustic Effect in Organic Structure Based on Star-Shaped Carbazole Derivatives

We have found that the structures based on ITO/tri(9-hexylcarbazol-3-yl)amine/Ca/Al fabricated by means of vacuum deposition generate acoustic oscillations when pulse voltage is applied. Impedance spectroscopy study indicates the presence of significant inductive response, which is the result of significant energy barriers at the semiconductor-metal interface. We assume that a very heterogeneous spatial distribution of the electric field at the organic/metal interface and the noncoplanarity of the molecules cause the electrostriction effect in the structures.