新时代民众心态与网络舆论引导模式的构建

民众心态可以全方位反映社会发展过程中产生的情绪、共识和价值取向,它是舆情危机事件频发的潜在动因。新时代民众心态的负面成分直接反映为舆论场生态,导致舆情危机的无序、失控状加剧。运用社会心理学研究理论,通过大量案例事实分析新时代民众心态的负面呈现,概括网络舆情危机爆发的"新常态",在把握舆论引导的导向原则、遵循舆论自身系统规律、进行多元协同治理等基础上,建构网络舆论引导立体化模式,从舆论、民众心态、社会问题中寻求逻辑,力图最大化发挥网络舆论的社会善治功能。     

淮海经济区国家高新区发展水平综合评价

构建了由经济规模、经济效益、创新能力3个一级指标以及18个二级指标构成的综合评价指标体系,运用熵值法对淮海经济区的5个国家级高新区的发展水平进行了综合评价.结果发现:5个国家级高新区发展水平存在差距,济宁高新区的发展水平最高,其次是徐州高新区,临沂高新区的发展水平最低.工业经济基础、研发投入、经济规模、结构效益等是影响高新区发展水平差异的主要因素.     

Flow and heat transfer behaviour of nanofluids in microchannels

Flow and heat transfer of aqueous based silica and alumina nanofluids in microchannels were experimentally investigated. The measured friction factors were higher than conventional model predictions at low Reynolds numbers particularly with high nanoparticle concentrations. A decrease in the friction factor was observed with increasing Reynolds number, possibly due to the augmentation of nanoparticle aggregate shape arising from fluid shear and alteration of local nanoparticle concentration and nanofluid viscosity. Augmentation of the silica nanoparticle morphology by fluid shear may also have affected the friction factor due to possible formation of a core/shell structure of the particles. Measured thermal conductivities of the silica nanofluids were in approximate agreement with the Maxwell-Crosser model, whereas the alumina nanofluids only showed slight enhancements. Enhanced convective heat transfer was observed for both nanofluids, relative to their base fluids (water), at low particle concentrations. Heat transfer enhancement increased with increasing Reynolds number and microchannel hydraulic diameter. However, the majority of experiments showed a larger increase in pumping power requirements relative to heat transfer enhancements, which may hinder the industrial uptake of the nanofluids, particularly in confined environments, such as Micro Electro-Mechanical Systems (MEMS).     

以木聚糖为抗菌剂的木质地板抗菌性能

随着生活水平的提高,人们越来越重视室内家居环境的健康、环保问题.因此,研究、开发抗菌实木地板具有现实意义.采用贴膜法检测抗菌地板的抗菌性能:以木聚糖为抗菌剂,用8%浓度溶液浸泡杨木单板,接种一定数量的大肠杆菌和金色葡萄球菌.经过一段时间培养后,检测地板细菌数量.结果表明:经过木聚糖溶液处理的地板对大肠杆菌和金色葡萄球菌的抗菌率为73.58%和90.09%,抗菌等级达到Ⅱ级.     

颈型颈椎病功能锻炼的研究概述

近年来,颈型颈椎病的发病率不断增高,对人们的工作、生活造成严重影响。研究表明,功能锻炼对颈型颈椎病的康复有重要作用,功能锻炼的方法分为传统中医气功锻炼法、肌力锻炼和保健操3类,这些方法实用、有效、方便,在颈型颈椎病的治疗中可以综合运用这些方法,从而在更短的时间里收到比以往更好的疗效。     

The Convergence of Least-Squares Progressive Iterative Approximation for Singular Least-Squares Fitting System

Data fitting is an extensively employed modeling tool in geometric design. With the advent of the big data era, the data sets to be fitted are made larger and larger, leading to more and more leastsquares fitting systems with singular coefficient matrices. LSPIA (least-squares progressive iterative approximation) is an efficient iterative method for the least-squares fitting. However, the convergence of LSPIA for the singular least-squares fitting systems remains as an open problem. In this paper, the authors showed that LSPIA for the singular least-squares fitting systems is convergent. Moreover, in a special case, LSPIA converges to the Moore-Penrose (M-P) pseudo-inverse solution to the leastsquares fitting result of the data set. This property makes LSPIA, an iterative method with clear geometric meanings, robust in geometric modeling applications. In addition, the authors discussed some implementation detail of LSPIA, and presented an example to validate the convergence of LSPIA for the singular least-squares fitting systems.     

贵州省印江县革底滑坡基本特征及其稳定性评价

贵州所处的特殊地理环境和脆弱的地质条件,极端气候的影响,使得滑坡地质灾害频发,如何预防和治理滑坡地质灾害仍是目前面临的难题。本文通过对贵州省印江县革底滑坡基本特征的分析认为:该滑坡为一特大型旋转牵引式顺层岩土体滑坡,并形成"堰塞湖",具有滑坡边界清楚、多级滑面、滑动时间长、多次滑动、滑向转向的特点,滑面发育在奥陶系下统大湾组泥灰岩间夹泥质条带,滑床为泥灰岩、滑带土为泥质条带。通过滑坡稳定性计算,该滑坡体目前处于整体稳定状态,但"堰塞湖"仍有可能产生次生泥石流地质灾害的灾害链,威胁下游村庄和公路,最后提出了该滑坡的综合治理措施。     

模拟海水环境下MICP固化滨海粉细砂的试验研究

在模拟海水环境下采用微生物固化法来加固滨海粉细砂,并通过无侧限抗压强度试验、碳酸钙含量试验和微观结构分析,研究了尿素浓度对MICP固化滨海粉细砂砂柱的影响,同时对比分析了淡水环境下MICP固化粉细砂的效果.研究结果表明:在海水环境下MICP技术固化滨海粉细砂是有效的,砂柱试件的无侧限抗压强度与碳酸钙含量随着尿素浓度的增加先增大后减小,并且1 mol·L-1尿素处理试件的加固效果最好;海水的弱碱性环境可促进巴氏芽孢杆菌的生长和繁殖,进而可形成大量的高活性脲酶,从而大大提高了微生物诱导碳酸钙沉积的效率.