基于网络科学的团队协作模型及网络模式的识别

网络科学的出现为研究和解决团队系统中的问题提供了新的方法和思路,在其框架下可以将团队的整体表现看作参与者之间的互动结果。文章将网络科学应用于足球运动中,为足球球员组成的团队构建了一个传控网络模型,并对模型的网络模式进行了进一步的分析。     

导弹综合试验与评估方法研究

科学合理的导弹试验与评估方法能够有效缩短研制周期,提高试验效益。导弹综合试验与评估方法旨在总体规划和设计导弹试验过程和内容,依据导弹模型验证技术提高建模与仿真在导弹试验与评估中的地位和作用,采用多源信息融合技术和Bayes评估技术提高导弹试验与评估结果的可信性。详细阐述了基于ST&E的导弹试验设计方法,并就综合试验设计的关键问题提出解决思路和方法。     

矿山生产调度计算机多目标决策模型的研究

由于采矿工艺自身的特殊性,致使矿山企业的生产调度决策采用一般单目标规划模型很难满足要求,因此,必须采用多目标决策模型才能合理地解决这一问题。多目标规划方法是单目标方法的新发展,它将单目标规划下的绝对约束改变成非绝对函数目标,并按优先等级,不同程度地予以满足,因而它总能找到一个最优解。矿山生产调度模型的建立,除了必须遵循一般的步骤以外,还必须充分了解和掌握不同采矿方法的工艺要求,以便从中提取工艺要求控制变量,并确定其优先级别,建立指标偏离函数。     

Fast accessing Web3D contents using lightweight progressive meshes

Accessing Web3D contents is relatively slow through Internet under limited bandwidth. Preprocessing of 3D models can certainly alleviate the problem, such as 3D compression and progressive meshes (PM). But none of them considers the similarity between components of a 3D model, so that we could take advantage of this to further improve the efficiency. This paper proposes a similarity‐aware data reduction method together with PM, called lightweight progressive meshes (LPM). LPM aims to excavate similar components in a 3D model, generates PM representation of each component left after removing redundant components, and organizes all the processed data using a structure called lightweight scene graph. The proposed LPM possesses four significant advantages. First, it can minimize the file size of 3D model dramatically without almost any precision loss. Because of this, minimal data is delivered. Second, PM enables the delivery to be progressive, so called streaming. Third, when rendering at client side, due to lightweight scene graph, decompression is not necessary and instanced rendering is fully exerted. Fourth, it is extremely efficient and effective under very limited bandwidth, especially when delivering large 3D scenes. Performance on real data justifies the effectiveness of our LPM, which improves the state‐of‐the‐art in accessing Web3D contents. Copyright © 2015 John Wiley & Sons, Ltd.     

一种高效过滤亚微米级细颗粒的新液固过滤技术——表层过滤

论述一种新的可高效过滤液体中亚微米级细颗粒的表层过滤技术,分析了表层过滤技术的特点、过滤模式、表层过滤基本条件和设计计算中所必需的数学模型。介绍了表层过滤技术在我国工业生产上推广应用的概况。     

三维地质建模质量控制方法及应用

从地质建模的流程入手,总结了建模过程中质量控制方法,主要从基础数据准备和质量控制,构造模型质量控制,相模型的质量控制,属性模型的质量控制,模型验证五个方面加以质量控制。在多个项目中的应用表明能够显著地提高地质模型的质量。     

Recursive State-space Model Identification of Non-uniformly Sampled Systems Using Singular Value Decomposition☆

In this paper a recursive state-space model identification method is proposed for non-uniformly sampled systems in industrial applications. Two cases for measuring all states and only output(s) of such...     

The HLD Study of Surfactant Partitioning for Oilfield Corrosion Inhibitors

The partitioning of corrosion inhibitor (CI) products is a measure of their potential to protect oilfield pipelines. In this paper the hydrophilic–lipophilic deviation (HLD) model is first used to quantify their partitioning in terms of the characteristic curvature (C _c,act) of a series of anionic (alkoxylated phosphate esters) and cationic (alkoxylated amines, aromatic amines, imidazoline acetates and quaternary amines) actives. This parameter is expressed over a range of pHs within which pipeline corrosion occurs. The HLD model is next used to predict the partitioning of each active from water into toluene at increased salinities. Linear mixing rules are lastly used to predict the characteristic curvature of Product A (C _c,mix) as a function of the C _c,act of a subset of actives.     

On the association between poly(vinyl alcohol) and sodium dodecyl sulfate and its effect on liquid–liquid interfacial tension: A mathematical model

Association between poly(vinyl alcohol-co-vinyl acetate) copolymer (PVA) and sodium dodecyl sulfate (SDS) was studied experimentally and theoretically. It was found that, for the ethyl acetate-aqueous phase interface in which PVA was previously adsorbed, the interfacial tension (γ) increases abruptly to a maximum and then exhibits a relatively mild decay with the addition of SDS to the aqueous phase. The theoretical results indicate that vinyl acetate (VAc) segments determine γ. However, for relatively low concentrations of SDS (C_SDS), this latter plays a major role because through its association with the VAc segments it modulates the extent to which PVA is adsorbed at the interface, indirectly determining the value of γ. As C_SDS approaches to the CMC value for SDS, its influence on γ decreases because SDS tends to self-assembly rather than associates with VAc. These model predictions are consistent with experimental findings reported in the literature.     

Tunnelling-induced response of a jointed pipeline and its equivalence to a continuous structure

The response of a jointed pipeline to tunnelling-induced ground settlement relies largely on the soil-pipe interaction. An analytical solution incorporating the Pasternak model is formulated here to estimate a jointed pipeline's deflection and bending moment. Subsequently, a procedure is proposed to transform the jointed pipeline to an equivalent continuous structure for a deflection evaluation. Case studies are conducted to verify the analytical solution, followed by parametric studies to assess the effects of the Pasternak model's parameters and the pipe joints. The analytical solution is validated by the experimental results in the literature. The parametric studies show that the number and distribution of the joints have a mild effect on the pipe deflection, whereas their influence on the pipe bending moment is significant. Similarly, the pipe bending moment is more sensitive than the pipe deflection to subgrade shear stiffness.