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排序方式: 共有169条查询结果,搜索用时 15 毫秒
31.
Attia Mohammed El Hadi Karthick A. Manokar A. Muthu Driss Zied Kabeel Abd Elnaby Sathyamurthy Ravishankar Sharifpur Mohsen 《Journal of Thermal Analysis and Calorimetry》2021,145(3):1215-1225
Journal of Thermal Analysis and Calorimetry - The Algeria Sahara suffers from the scarcity of drinking water. Solar distillation is one of the simplest and generally inexpensive techniques to solve... 相似文献
32.
N. Bennis A. Spadło R. Dąbrowski E. Martinelli G. Galli X. Quintana J. M. Otón M. A. Geday 《Opto-Electronics Review》2006,14(4):281-285
Asymmetric antiferroelectric liquid crystal displays (AAFLCD) are attractive since they show a very well defined off state
and fast switching time. Moreover, they can be driven by a simple biasless DC compensated waveform. The electrooptical response
of an AAFLCD allows for new addressing modes, including quasi-static intermediate greyscales maintained without applying a
field and passively addressed multiplexed high-frequency displays and spatial light modulators. A new kind of asymmetric cells
have been obtained by using fluorinated block copolymer (FBC) alignment, which enhances surface segregation and provides a
low energy surface. In this work we combine FBC alignment with antiferroelectric liquid crystal mixtures containing strongly
electronegative fluorinated components. Threshold voltages for the antiferroelectric-ferroelectric phase transition as low
as 3 volts are observed. We report the time evolution of the shift of the electro-optical response. 相似文献
33.
Combellas C Ghilane J Kanoufi F Mazouzi D 《The journal of physical chemistry. B》2004,108(20):6391-6397
Fluoropolymers have been reduced locally by the radical anion of a redox mediator electrogenerated at a microelectrode operating in the configuration of a scanning electrochemical microscope. Approach curves with different redox mediators were used to investigate the reduction mechanism of the fluoropolymer. Different factors are discussed, such as the monomer reduction mechanism, the kinetic control by the surface modification growth, and the conductivity of the modified surface. The fluoropolymers' reduction parallels the trends observed in organic electrochemistry in solution within the haloalkane series. 相似文献
34.
We study the concepts of the 𝒫C-projective and the ?C-injective dimensions of a module in the noncommutative case, weakening the condition of C being semidualizing. We give the relations between these dimensions and the C-relative Gorenstein dimensions (GC-projective and GC-injective dimensions) of the module. Finally, we compare, in some circumstances, the global 𝒫C-projective dimension of a ring and the global dimension of the endomorphisms ring of C. 相似文献
35.
The influence of six antiferroelectric compounds on the helical pitch of mixture W-1000, which was reported as long pitch orthoconic antiferroelectric liquid crystalline mixture, was checked by spectrophotometry and polarimetry methods. The electro-optical properties for the mixture with the longest pitch were measured. An improvement in electro-optical response due to the long pitch is reported. The novelty in electro-optical properties is the good symmetry response. 相似文献
36.
37.
Computational Management Science - Motivated by a model introduced by Moiseev, we consider a problem of optimal investment into agricultural infrastructure (irrigation, storage) under uncertainty... 相似文献
38.
In this paper, we prove some fixed point results for multivalued mappings in bounded metric spaces via symmetric spaces. Moreover an application to an integral inclusion is given.
相似文献39.
Sergio Amat Concepción Bermúdez Sonia Busquier Driss Mestiri 《Journal of Computational and Applied Mathematics》2009
A modification of some classical third order methods is studied. The main advantage of these methods is that they do not need evaluate any Fréchet derivative. A convergence theorem in Banach spaces, just assuming that the second divided difference is bounded by a nondecreasing function and a punctual condition, is presented. Fréchet differentiability is not required. Finally, a particular example is analyzed where our conditions are fulfilled and the classical ones fail. 相似文献
40.
Stanisław Boryczka Kinga Suwińska Georges Le Guillanton Quang Tho Do Driss Elothmani 《Journal of chemical crystallography》1998,28(7):555-560
The title compound (C14H11NO2) is monoclinic with a = 13.579(2), b = 5.297(1), c = 16.455(2) Å, = 98.11(2)°, Z = 4, and space group P21/n. The significant structural features lie in the two carbonyl groups of the glyoxamide which are oriented antiperiplanar to each other [–163.6(3)°]. The central bond C(1)–C(2) is 1.545(4) Å. The observed conformation is stabilized by intramolecular hydrogen bonds. 相似文献