Parallel framework for dense disparity map estimation using Hamming distance

A novel framework for sparse and dense disparity estimation was designed, and the proposed framework has been implemented in CPU and GPU for a parallel processing capability. The Census transform is applied in the first stage, and then, the Hamming distance is later used as similarity measure in the stereo matching stage followed by a matching consistency check. Next, a disparity refinement is performed on the sparse disparity map via weighted median filtering and color K-means segmentation, in addition to clustered median filtering to obtain the dense disparity map. The results are compared with state-of-the-art frameworks, demonstrating this process to be competitive and robust. The quality criteria used are structural similarity index measure and percentage of bad pixels (B) for objective results and subjective perception via human visual system demonstrating better performance in maintaining fine features in disparity maps. The comparisons include processing times and running environments, to place each process into context.     

Creep-rupture behaviour of notched oxide/oxide ceramic matrix composite in combustion environment

ABSTRACT

Creep-rupture tests were performed in the combustion environment on double-edge notch and centre hole oxide/oxide ceramic matrix composite specimens. The specimens were exposed to the maximum temperature of 1250?±?50°C in the notch region where the combustion flame directly impinged. Specimens were loaded to the desired creep load levels and the loads were sustained till either the specimens ruptured or a run-out time of 25?h was achieved. Optical and scanning electron microscopes were used to characterise specimen damage. The test results were compared to its counterparts in 1200°C (isothermal) laboratory air environment. At a given creep life, the applied creep stress for both the notch types was generally lower in the combustion environment than the laboratory air environment. Finite element simulations attributed lower applied creep stress in the combustion environment to the presence of thermal gradient stresses, which were not present in the isothermal laboratory air environment.     

Certain aspects of shock-wave motion of a medium caused by phase transitions and failure

The article presents the results of a numerical solution of the problem of explosion in silicate rock taking into account melting, polymorphic phase transition, and various kinds of brittle failure. We show that phase transition provides an effective increase in the stability of a medium to explosive effect, while cracking processes lead to the formation of a stable two-wave structure. A relationship between the destruction parameters and the structure of shock-wave elastic motion is established. We estimate the effect of phase transitions and failure on the spectrum of acoustic emission initiated by explosion.Academic Scientific Complex A. V. Luikov Heat and Mass Transfer Institute of the Academy of Sciences of Belarus, Institute of the Solid-State and Semiconductor Physics, Academy of Sciences of Belarus, Minsk. Translated from Inzhenerno-Fizicheskii Zhurnal, Vol. 68, No. 6, pp. 897–904, November–December, 1995.     

A library of organic landscapes on filamentous phage

A billion-clone library of filamentous phage with differentsurface structures (‘landscapes’) was generatedby fusing random octapeptides to the N-terminus of all 4000copies of the major coat protein. Such a ‘landscape library’might include clones exhibiting emergent properties that inherein the entire surface architecture, not in the peptides by themselves.Because the diverse surface landscapes are displayed on viablephage, they can be surveyed for exceedingly rare functions usingmicrobiological selection methods. Clones with several emergentproperties of the sort envisioned were successfully selected,suggesting that landscape libraries have promise as a novelsource of nanomaterials with exploitable surface properties.     

热障涂层后处理技术研究进展

热障涂层是一种降低航空发动机热端部件表面温度、提高发动机推力和效率的热防护技术,但其服役于高温、高压、高交变应力等恶劣环境而易脱落失效．对热障涂层的后处理技术进行了阐述,论述了真空热处理、热等静压处理、激光重熔、激光上釉、激光熔覆等后处理技术的方法和原理,并对比了不同工艺的优缺点．最后,展望了激光表面改性技术的应用前景和未来发展趋势．     

The Effect of the Polarization Characteristics of Probe Light on the Signal of Optically Detected Magnetic Resonance in Magnetometric and Gyroscopic Quantum Sensors

Technical Physics Letters - We consider the effect of the polarization characteristics of probe light on the signal of optically detected magnetic resonance in quantum sensors, including quantum...