Leveraging Blur Information for Plenoptic Camera Calibration

International Journal of Computer Vision - This paper presents a novel calibration algorithm for plenoptic cameras, especially the multi-focus configuration, where several types of micro-lenses are...     

Reliability analysis of roadway departure risk using stochastic processes

The work presented here aims to develop a warning device to prevent roadway departure while cornering. Given the random variability arising from the driver, the vehicle and the infrastructure at the entrance of the curve, a probabilistic strategy is adopted to assess the roadway departure risk. Random variables and processes are introduced in a specifically developed vehicle dynamics model. The driver's behaviours are deduced from real traffic measurements. Structural reliability methods are employed to compute a roadway departure risk index, used to take the decision of an alarm triggering. Particular care is brought to the reduction of the computational cost. Refinements made on the standard reliability methods to handle with the model non-linearities and the stochastic dimension are presented.     

Ecotoxicological analysis of glasses obtained from industrial residues using E. coli and S. aureus as bioindicators

This work deals with the study of the effect of coal ashes and industrial residues in the inertness of glasses designed for industrial uses. Five formulations with four factors (residues) and constraints were used according a mixture design. The residues were dried, sieved and mixed according to the design. The formulations were melted at 1450 °C during 2 h for stabilization using 10% wt of Na₂CO₃ (fluxing agent). The melts were cast into a refrigerated water mold and annealed at 600 °C, and thus, the glasses were analyzed regarding their ecotoxicological effect using the Agar Diffusion Test for Escherichia coli and Staphylococcus aureus as bioindicators, comparing the results with the Artemia sp. Acute Toxicity Test. The results were studied by analysis of variance in order to determine the individual influence of each residue in the inertness of the glass system. As a final result, the ecotoxicological analysis showed that the galvanic residue makes a non-inert glass due to the high iron and zinc content of this waste. The Agar Diffusion Test is a fast and accurate technique to determine the toxicity of glass systems only for high concentration samples.     

咸水含水层中CO_2地质封存井口压力的确定及应用

CO2地质封存是减少二氧化碳排放的有效途径之一,井口压力的大小直接关系到封存项目的有效性和安全性。本文总结了井口压力求取的常规方法和漂移流模型解析法,并在实际封存场地进行了比较应用分析,结果发现漂移流模型解析法对井中流体运动刻画的更为准确,所得的结果与实际值更接近,而且井径大小对井口压力有一定程度的影响,其结果可为实际CO2地质封存项目的实施提供技术支持。     

一种抗凝血药物新型Xa因子抑制剂的合成

血栓栓塞性疾病是威胁人类生命健康的最常见的疾病之一,具有高发病率、高致残率、高死亡率的特点。目前Xa因子是凝血级联反应中研究较多的靶点。有研究表明某类含苯甲磺酰基和苯脒基的多肽小分子有较高的抗凝活性,其对凝血级联反应中Xa因子有较高的选择抑制性。本研究选用液相合成法合成该类化合物。     

Executive functions in multiple sclerosis: An analysis of temporal ordering, semantic encoding, and planning abilities.

Previous studies have consistently demonstrated impairments in conceptual reasoning and set-shifting abilities in patients with multiple sclerosis (MS). Other executive functions have been less frequently examined. We compared 44 MS patients and 48 demographically matched controls on a temporal-ordering and semantic-encoding task and on a test of planning (Tower of Hanoi). Compared with controls, MS patients experienced deficient semantic encoding and planning but unimpaired temporal-order memory. For both tasks, post hoc analyses indicated that chronic-progressive MS patients contributed most to the group differences. A combination of poor planning and slowed information-processing speed was hypothesized to have contributed to MS patients' impaired Tower of Hanoi performance. Further research is needed to explore the possible relationship between semantic-encoding and planning deficits in MS and social and occupational disabilities. (PsycINFO Database Record (c) 2010 APA, all rights reserved)     

Perturbation of an elementary logic system submitted to the effects induced by a perturbing sine wave

Data transmission networks and systems are often subject to perturbations due to the fact that (low level) data signals are surrounded by perturbing electromagnetic fields. This paper presents and analyses information perturbing mechanisms. The authors examine data streams transmitted by an elementary system which represents the basis of any electronic device. We show the influence of technological families of cmos circuits and present a test method and bench to investigate the sensitivity of devices under test by means of statistical parameters.     

Cognitive complexity and appraisal effectiveness: Back to the drawing board?

Tested C. E. Schneier's (see record 1978-11450-001) cognitive compatibility theory. In Exps I and II, 100 undergraduates rated college instructors and professor vignettes, respectively. Results show that rater cognitive complexity was unrelated to rating accuracy, halo error, acceptability of rating format, or confidence in ratings. In Exp III, 31 police sergeants rated patrol officers, and the results show that halo error and acceptability of formats were unrelated to cognitive complexity. In Exp IV, 95 undergraduates' ratings of managerial performance and instructor effectiveness showed no support for the cognitive compatibility theory. However, the data showed that raters' ability to generate dimensions was significantly related to halo error in instructors' ratings. Implications for cognitive compatibility theory and future research with the method of generating performance dimensions are discussed. (30 ref) (PsycINFO Database Record (c) 2010 APA, all rights reserved)     

Consistent and stable meshfree Galerkin methods using the virtual element decomposition

Over the past two decades, meshfree methods have undergone significant development as a numerical tool to solve partial differential equations (PDEs). In contrast to finite elements, the basis functions in meshfree methods are smooth (nonpolynomial functions), and they do not rely on an underlying mesh structure for their construction. These features render meshfree methods to be particularly appealing for higher‐order PDEs and for large deformation simulations of solid continua. However, a deficiency that still persists in meshfree Galerkin methods is the inaccuracies in numerical integration, which affects the consistency and stability of the method. Several previous contributions have tackled the issue of integration errors with an eye on consistency, but without explicitly ensuring stability. In this paper, we draw on the recently proposed virtual element method, to present a formulation that guarantees both the consistency and stability of the approximate bilinear form. We adopt maximum‐entropy meshfree basis functions, but other meshfree basis functions can also be used within this framework. Numerical results for several two‐dimensional and three‐dimensional elliptic (Poisson and linear elastostatic) boundary‐value problems that demonstrate the effectiveness of the proposed formulation are presented. Copyright © 2017 John Wiley & Sons, Ltd.