可变R-L-C元件的SPICE模拟行为建模

一些仿真器没有包含LRC元件的ABM方程,采用本文所述的简单子电路,可以根据复杂的分析表达式（包括逻辑表达式）创建无源元件,比如建立非线性电容、时变电阻等.     

Nonlinear fluid–structure interaction problem. Part I: implicit partitioned algorithm,nonlinear stability proof and validation examples

In this work we consider the fluid-structure interaction in fully nonlinear setting, where different space discretization can be used. The model problem considers finite elements for structure and finite volume for fluid. The computations for such interaction problem are performed by implicit schemes, and the partitioned algorithm separating fluid from structural iterations. The formal proof is given to find the condition for convergence of this iterative procedure in the fully nonlinear setting. Several validation examples are shown to confirm the proposed convergence criteria of partitioned algorithm. The proposed strategy provides a very suitable basics for code-coupling implementation as discussed in Part II.     

Real-time structured light coding for adaptive patterns

Coded structured light is a technique that allows the 3D reconstruction of poorly or non-textured scene areas. With the codes uniquely associated with visual primitives of the projected pattern, the correspondence problem is quickly solved by means of local information only, with robustness against disturbances like high surface curvatures, partial occlusions, out-of-field of view or out-of-focus. Real-time 3D reconstruction with one shot is possible with pseudo-random arrays, where the encoding is done in a single pattern using spatial neighbourhood. To correct more mismatched visual primitives and to get patterns globally more robust, a higher Hamming distance between all the used codewords should be suited. Recent works in the structured light field have shown a growing interest for adaptive patterns. These can account for geometrical or spectral specificities of the scene to provide better features matching and reconstructions. Up till today, such patterns cannot benefit from the robustness offered by spatial neighbourhood coding with a minimal Hamming distance constraint, because the existing algorithms for such a class of coding are designed with an offline coding only. In this article, we show that due to two new contributions, a mixed exploration/exploitation search behaviour and a O(n ²) to ～O(n) complexity reduction using the epipolar constraint, the real-time coding of patterns having similar properties than those coded offline can be achieved. This allows to design a complete closed-loop processing pipeline for adaptive patterns.     

Structure of β-lactoglobulin microgels formed during heating as revealed by small-angle X-ray scattering and light scattering

We have investigated the structure of microgels formed during heating of demineralized β-lactoglobulin (βlg) solutions at pH 5.9 by small-angle X-ray scattering (SAXS) and light scattering. First, unheated βlg solutions were characterized at different pH values between 2.0 and 7.0. At pH 5.9, βlg solutions contain mainly dimers (with a radius of approx. 2 nm), which coexist with a small number of larger oligomers (approx. 4 nm). Afterwards, βlg microgels, which form upon heating, were studied. They exhibit an average hydrodynamic radius around 130 ± 20 nm and an average molar mass around 7 × 10⁸ g mol⁻¹. We followed the temporal evolution of the various structures that form after different heating times using subsequent SAXS measurements of the entire sample, the soluble fraction where the βlg microgels were removed, and the solvent. After an hour of heating at 85 °C the maximum yield of the βlg microgels (ca. 70%) is almost reached. Interestingly, the SAXS data show a correlation peak corresponding to a characteristic distance of about 9 nm, indicating an internal organization of the microgels. During the heating procedure the pH increases from pH 5.9 to approximately 6.6, which is induced by the partial conversion of βlg into βlg microgels that exhibit less buffering capacity than native protein. The remaining soluble fraction consists of native βlg and some small aggregates, whose number increases on the cost of native βlg as heating time proceeds. We propose that the formation of these lower molecular mass aggregates is triggered by the increased pH.     

Modelling and analysis of multi-stage systems of mistuned bladed disks

A stochastic reduced-order modelling technique for multi-stage mistuned bladed disks assemblies is proposed. In a perturbation framework, the base-line reduced-order model is built using multi-stage cyclic symmetry modelling approach. Uncertainties are introduced in the modal space at the component level and further propagated in the global modal space. This results in a compact model suitable for statistical analyses based on Monte-Carlo simulations.Applications highlight the numerically efficiency of the proposed approach which features good correlation and convergence both from deterministic and probabilistic points of view. Statistical investigations on the forced response amplification show effects of multi-stage coupling on mistuning sensitivity.     

Antenna design and channel modeling in the BAN context—part I: antennas

The first results achieved in the French ANR (National Research Agency) project BANET (Body Area NEtwork and Technologies) are presented (Part I). This project mainly deals with the antenna design in the context of Body Area Networks applications and channel characterization. General conclusions are drawn on the body impact on the antenna performance for on–on and in–on communications (Medical Implant Communication Systems). Narrow-band and ultra-wideband contexts are addressed both numerically and experimentally, and it is shown that design questions are significantly different for each case, leading to different constraints and guidelines. For narrow-band antennas, an alternative and original approach of desensitization using ferrite sheets is proposed and compared to classical techniques based on ground-plane screening. The characterization of numerical phantoms is also analyzed with narrow-band canonical antennas. For the specific on–on scenario, morphologies and electrical properties of the human tissues are also included in the topics of interest. For ultra-wideband antennas, focus is put on planar balanced designs, notably to reduce harmful “cable effects” occurring during the antenna characterization or the channel sounding. For both types of antennas, the main parameter under study is the distance to the body, which has a significant influence.     

Application of EC regulation no. 2073/2005 regarding Listeria monocytogenes in ready-to-eat foods in retail and catering sectors in Europe

This paper covers the key elements regarding the risks factors for Listeria monocytogenes causing listeriosis in food prepared in the retail and catering sectors in Europe. This article specifically considers the application of EC Regulation No. 2073/2005 L. monocytogenes criteria in ready-to-eat foods to these sectors, and presents guarantee prevention measures applicable to these sectors. The current approach will have to be integrated in to the 2009 Codex international standard for L. monocytogenes in RTE foods.     

Fukushima Daiichi fuel debris retrieval: results of aerosol characterization during laser cutting of non-radioactive corium simulants

ABSTRACT

The production and dispersion of contaminated aerosols during the laser cutting of corium can potentially provide useful insights into the dispersion of contamination during the evacuation of damaged reactors during decommissioning. Quantitative assessments of contamination dispersion are fundamental to the development of a safety case for the decommissioning of the Fukushima Daiichi plant. This collaborative work between IRSN, ONET Technologies and CEA, managed by the Mitsubishi Research Institute on behalf of the Japanese Ministry of Economy, Trade and Industry, presents the characterization of aerosols generated during laser cutting of corium simulants both in air and under water.

The objective is to obtain quantitative data for risk assessment related to the contamination released and disseminated when implementing this technique, over the next few years, in the process of decommissioning the damaged reactors. This paper presents a part of the results stemming from this project, focused on the characterization of aerosols produced during laser cutting of two representative corium simulants in air and underwater conditions. The experimental configuration also enabled investigation of the production of other material residues such as particle dross and water purity on the particulate composition of the aerosols. Ultimately, the radioisotope concentration distribution in the aerosols are transposed to radioactivity in order to assess the risk to radiation workers during decommissioning.     

Flaxseed proteins: food uses and health benefits

Flaxseed proteins are potent multi‐functional ingredients for food formulation owing to their techno‐functionalities, food preservation capacity, and health benefits. A possible synergistic effect with mucilage on their functionalities could be valuable even though this co‐product in flaxseed may limit the protein yield during their production processes. Their techno‐functional properties could also be considered in mixture with other flax bioactive components such as lignans and fibre to enhance the value of the flaxseed meal. The present paper reviews flaxseed protein uses in food and their health benefits. New perspectives according to consumers’ demand for products with health promoting bioactive components are also suggested.