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排序方式: 共有293条查询结果,搜索用时 15 毫秒
251.
Artur Mȩski Wojciech Penczek Maciej Szreter Bożena Woźna-Szcześniak Andrzej Zbrzezny 《Autonomous Agents and Multi-Agent Systems》2014,28(4):558-604
The paper deals with symbolic approaches to bounded model checking (BMC) for the existential fragment of linear temporal logic extended with the epistemic component (ELTLK), interpreted over interleaved interpreted systems. Two translations of BMC for ELTLK to SAT and to operations on BDDs are presented. The translations have been implemented, tested, and compared with each other as well as with another tool on several benchmarks for MAS. Our experimental results reveal advantages and disadvantages of SAT- versus BDD-based BMC for ELTLK. 相似文献
252.
G. Moskal L. Swadźba M. Hetmańczyk B. Witala B. Mendala J. Mendala P. Sosnowy 《Journal of the European Ceramic Society》2012,32(9):2025-2034
We present herein a characterization of the microstructure and thermal properties of thermal barrier coatings (TBCs), which we obtained via plasma spraying of powder Gd2Zr2O7. By using X-ray diffraction (XRD) and electron backscatter diffraction (EBSD), we evaluated the phase composition of a ceramic layer and estimated the ceramic-layer stress state by the sin2ψ method. The tests revealed that the TBC layer consisted of a single-phase structure of Gd2Zr2O7, namely, an Fd3m lattice. The thermal diffusivity of the outer ceramic layer was determined based on a bilayer model and corrected with a factor to account for the presence of pores. The results reveal that the use of the standard parameters in a standard spraying process gives good-quality Gd2Zr2O7 TBCs with a thermal conductivity considerably lower than 8YSZ-type TBCs. 相似文献
253.
Tomek Kopczyński Marek Loźynski Krystyna Prochaska Artur Burdzy Ryszard Cierpiszewski Jan Szymanowski 《溶剂提取与离子交换》2013,31(4):701-725
ABSTRACT Composition, structure and interfacial activity of alkanal oximes and kinetics of copper extraction from chloride solutions are discussed. Semiempirical self-consistent field calculations are used to study the structure of alkanal oximes and their mono- and dihydrates. These calculations are in a qualitative agreement with the ratio of alkanal (Z)-and (E)-isomers, interfacial activity and kinetics data. 相似文献
254.
The effect of sterically hindered carbosilane moieties, situated as end groups in telechelic oligodimethylsiloxanes, was investigated
with respect to the mobility of silicon atoms in the main chain. The relaxation phenomena in such crowded systems were studied
by DSC and NMR methods. Spin–lattice relaxation times T
1 (29Si NMR) of silicon atoms in the oligomer chain were estimated and related to the distance between a given siloxane unit and
the carbosilane moiety. It was found that the mobility of terminal siloxane units has been substantially affected. However,
in the long range, the effect does not to seem to outweigh the intrinsic flexibility of the siloxane bonds. 相似文献
255.
Aneta Araźna Grażyna Kozioł Kamil Janeczek Konrad Futera Wojciech Stęplewski 《Journal of Materials Science: Materials in Electronics》2013,24(1):267-271
In this work, a study of the surface properties of treated indium tin oxide (ITO) substrates is reported. We used three different cleaning treatments among others: washing in an ultrasonic bath of acetone and ethyl alcohol or isopropyl alcohol in room temperature as well as dipping into solution (prepared from NH4OH (25 %), H2O2 (30 %) and distilled water) at 60 °C. The relation between ITO morphology and surface properties has been studied by contact angle, and surface energy measurements as well as the surface roughness of ITO samples evaluation by atomic force microscopy (AFM). Experimental results show that the ITO surface properties are closely related to the treatment methods. The ultrasonic degreasing in acetone and ethyl alcohol yields the highest surface energy (38.5 mJ/m2), brings about the maximum reduction in contact angles and causes the smallest increasing the surface roughness of ITO substrates. 相似文献
256.
Wu Y.H. Chen W.J. Chang S.L. Chin A. Gwo S. Tsai C. 《Electron Device Letters, IEEE》1999,20(5):200-202
We have developed a simple process to form epitaxial CoSi2 for shallow junctions. Prior to metal deposition, the patterned wafers were treated with HF-vapor passivation. As observed by scanning tunneling microscopy (STM), this HF treatment drastically improves the native oxide-induced surface roughness. The epitaxial behavior was confirmed by cross-sectional transmission electron microscopy (TEM). Decreased sheet resistance and leakage current, and improved thermal stability are displayed by the HF treated samples, which is consistent with STM and TEM results 相似文献
257.
258.
Antimicrobial and Cytotoxic Properties of Bisquaternary Ammonium Bromides of Different Spacer Length 下载免费PDF全文
Katarzyna Łudzik Kinga Kustrzepa Magdalena Kowalewicz‐Kulbat Renata Kontek Bogdan Kontek Aneta Wróblewska Małgorzata Jóźwiak Daria Lulo 《Journal of surfactants and detergents》2018,21(1):91-99
A group of cationic gemini surfactants (bisquaternary ammonium bromides) with different spacer chain lengths (8–6–8, 8–7–8, 8–8–8, 8–9–8) was investigated, paying special attention to antimicrobial and the cytotoxic properties as well as their antimicrobial activity during long‐term storage. It was shown that the compounds investigated exhibit excellent antimicrobial activity against Gram‐positive bacteria (Staphylococcus aureus) and Gram‐negative bacteria (Pseudomonas aeruginosa) as well as antifungal properties (Candida albicans). The gemini surfactants tested had the differential level of cytotoxicity against normal lymphocytes. It was shown that the spacer chain length plays an important role in antibacterial activity and influences the cytotoxicity. The gemini surfactants with shorter spacer chain length, that had higher critical micelle concentration, showed generally weaker antibacterial properties, but on the other hand, these exhibited lower level of cytotoxicity. Furthermore, the aqueous solution of gemini surfactants exhibited the same antimicrobial activity even after 3 months. 相似文献
259.
The effect of copper oxides on the curing behaviors of the bismaleimide triazine (BT) prepreg is studied with infrared spectroscopy (IR), attenuated total reflection infrared spectroscopy (ATR), and X‐ray photoelectron spectroscopy (XPS). The result of IR analyses indicates that there is a concentration distribution present in the prepreg surface layer and the outer surface layer contains less cyanate, imide, and epoxide but more triazine groups than the inner layer. From ATR, it is concluded that the cuprous oxide attracts more cyanate ester resins but less bismaleimide resins from the prepreg to its surface than the cupric oxide. The copper surface affects the curing extent of the BT resin in contact and the cupric oxide has a more pronounced effect than the cuprous oxide, and this surface effect can extend to at least two microns deep into the BT prepreg from the contacted interface. The XPS results confirm that the BT/CuO interface contains more thermally stable and polar functional groups than the BT/Cu2O interface, and both two copper oxides attract only a small amount of brominated epoxy resin onto their surfaces. These results are attributed to the difference in preferential adsorptions and catalytic curing effects of two copper oxides on the BT prepreg in contact.
260.
Lech Jóźwiak 《Artificial Intelligence Review》2003,20(3-4):269-318
Progress in microelectronic technology is extremely fast and it is outstripping the designers' abilities to make use of the created opportunities. Development and application of new more suitable design methods and tools is therefore very important for the modern system industry. This paper shows the importance of the AI search techniques for the circuits and systems design space exploration, explains what sorts of search techniques are useful for this aim, and discusses the place, role and way of use of these techniques in circuit and system design. In particular, the paper explains the importance and usage of the heuristic search techniques for the automatic construction and selection of the most promising solutions to the circuit synthesis problems. The discussion and conclusions of the paper are illustrated with examples of three effective and efficient search algorithms, and experimental results from their application to two important circuit synthesis problems. The knowledge presented in the paper combines numerous valuable concepts of modern system engineering and artificial intelligence, and forms a base for further research and application of the AI search techniques to design of complex circuits and systems. 相似文献