An optimal dynamic threat evaluation and weapon scheduling technique

Real time scheduling problems demand high level of flexibility and robustness under complex dynamic scenarios. Threat Evaluation (TE) and Weapon Assignment (WA), together TEWA is one such complex dynamic system that has optimal or near optimal utilization of scarce defensive resources, a supreme priority. Several static solutions of TEWA have been proposed. This paper discusses an optimal dynamic multi-air threat evaluation and weapon allocation algorithm using a variant of Stable Marriage Algorithm (SMA). WA uses a new dynamic weapon scheduling algorithm, allowing multiple engagements using shoot-look-shoot strategy, to compute near-optimal solution. For optimality different types of constraints are identified and defined. Testing part of this paper shows feasibility of this approach for a range of scenarios.     

Augmenting training data with syntactic phrasal-segments in low-resource neural machine translation

Machine Translation - Neural machine translation (NMT) has emerged as a preferred alternative to the previous mainstream statistical machine translation (SMT) approaches largely due to its ability...     

Nano-Scale Indentation Creep Testing at Non-Ambient Temperature

Depth sensing nanoindentation can be used to study the time-dependent deformation of very small volumes of materials, contacts, and thin films. Force modulation provides a continuous measure of the contact stiffness during an indentation, and minimises the adverse effect of thermal drift which is particularly important for sub-micron samples. Most of the nanoindentation experimental work so far has been carried out at room temperature. In this paper we describe a solid-state thermoelectric heating and cooling system which gives a straightforward way to vary the temperature of both sample and tip. The capabilities of the technique are demonstrated by observing the time and temperature dependent creep properties of high purity Indium. Hardness, its strain rate dependence, the stress exponent, and the activation energy for the creep process can all be directly measured from nanometre scale contacts, and the values obtained are similar to those from bulk conventional creep testing. The technique is likely to be of particular value for polymer thin films.     

TOCOPHEROLS AND PHOSPHOLIPIDS ENHANCE THE OXIDATIVE STABILITY OF BORAGE AND EVENING PRIMROSE TRIACYLGLYCEROLS

The effect of individual phospholipids and tocopherols as well as their combinations on the oxidative stability of borage and evening primrose triacylglycerols (TAG) was investigated. Based on conjugated dienes (CD) and 2-thiobarbituric acid reactive substances (TBARS) formed in borage and evening primrose TAG, the antioxidant effectiveness of phosphatidylcholine (PC), was higher than that of phosphotidylethanolamine (PE) in borage TAG while the reverse was observed for evening primrose TAG. Meanwhile, a synergistic effect between tocopherols and phospholipids in both borage and evening primrose TAG was noted. The most effective combination in borage TAG was that of PC and α-tocopherol, while PE with α-tocopherol exerted the best effects in evening primrose TAG. Therefore, the antioxidant effectiveness of phospholipids may vary depending on their fatty acid composition, nature of the functional groups and the chemical composition of the lipid system in which they are examined. The results also demonstrate the importance of minor components of vegetable oils on their oxidative stability.     

Computational Fluid Dynamics in Turbomachinery: A Review of State of the Art

Computational fluid dynamics (CFD) plays an essential role to analyze fluid flows and heat transfer situations by using numerical methods. Turbomachines involve internal and external fluid flow problems in compressors and turbines. CFD at present is one of the most important tools to design and analyze all types of turbomachinery. The main purpose of this paper is to review the state of the art work carried out in the field of turbomachinery using CFD. Literature review of research work pertaining to CFD analysis in turbines, compressors and centrifugal pumps are described. Various issues of CFD codes used in turbomachinery and its parallelization strategy adopted are highlighted. Furthermore, the prevailing merits and demerits of CFD in turbomachinery are provided. Open areas pertinent to CFD investigation in turbomachinery and CFD code parallelization are also described.     

相机模块组装与测试的挑战

相机模块的组装和测试工艺需要面对同标准封装工艺不同的独特挑战。这些挑战来在于杂质颗粒控制和材料选择两方面的特殊要求。