基于性别视角的社交媒体用户造谣传谣和举报谣言行为研究

研究男性与女性用户在社交媒体中造谣（传谣）和举报谣言行为上的差异性,有助于制定针对性的谣言消解措施。以新浪微博中已被证实为谣言的微博内容为数据源。采用列联卡方检验（Chi-squared test）检验了男性和女性用户在造谣（传谣）和举报谣言行为上的差异,同时通过隐含狄利克雷分布（Latent Dirichlet Allocation）对男女用户生成和举报的谣言内容进行了主题分类。结合列联卡方检验结果和主题分类结果,对社交媒体男女用户在造谣传谣和举报谣言行为上的差异进行了讨论。主要研究发现如下：造谣（传谣）行为方面,女性用户中造谣（传谣）的比率显著高于男性用户;举报谣言行为方面,男性用户中举报谣言的比率显著高于女性用户（x²=169.426,P<0.001）。两性用户均关注国际关系话题,但也存在差异性：男性用户造谣传谣的内容重点聚焦于国际关系方面,而女性造谣传谣的内容还体现在社会安全、食药安全和突发事件方面。在研究结果基础上,为社交媒体运营商提出了谣言消解措施。     

企业社会责任对财务绩效的影响研究——以交通运输行业为例

本文以交通运输行业企业社会责任履行对企业财务绩效的影响为立足点,采用利益相关者理论进行多维度社会责任指标划分,通过静态回归分析、动态滞后模型对2011-2015年期间在沪深证券交易所上市的37家交通运输行业公司进行实证研究并提出对策建议。研究结果表明：交通运输行业企业社会责任的履行及企业的成长性均对当期财务绩效指标存在明显的正向作用,而公司的规模对当期财务绩效有明显的负向影响。财务绩效将同时受到滞后一期及滞后两期企业社会责任的正向影响,且时间越长,当期社会责任对后期财务绩效的影响越弱。无论对于当期或后期财务绩效指标而言,企业社会责任均对会计指标衡量的财务绩效产生较市场指标衡量更为显著的正向作用。     

影响高职院校专业设置与调整的因素分析

专业是高职院校的核心平台,专业设置与调整是教学管理工作的首要环节,是关系到学校建设与发展的重大问题.从商品经济和市场的角度,对影响专业设置与调整的因素进行分析与评判,可以为高职院校教学管理工作提供有益的参考.     

对外和平与对内认同——当代中国民族主义发展流变与理性塑造

改革开放以来,中国迎来全面转型,社会思潮一日千里。民族主义思潮——一种近代以来就影响了中国历史发展的社会思潮被赋予了更多的时代色彩。揆诸近代中国历史发展史实可知,民族主义是一把"双刃剑",既曾激励过民族自强和解放,亦曾激发国人盲目排外与自大。在检视改革开放以来民族主义思潮发展流变及其主要特征后,本文认为:无论是学界还是政府都应当着力培植民众的理性民族主义,即在超越历史、超越党派信仰的基础上,对外追求世界和平,对内追求民族认同,这是理性民族主义所追求的两大价值目标,也是人类文明保持健康发展和多样性不可或缺的两大前提条件。     

Molecularly imprinted polymers as the extracted sorbents of clenbuterol ahead of liquid chromatographic determination

A pre-treatment methodology for clenbuterol hydrochloride (CLEN) isolation and enrichment in a complex matrix environment was developed through exploiting molecularly imprinted polymers (MIPs). CLEN-imprinted polymers were synthesized by the combined use of ally-β-cyclodextrin (ally-β-CD) and methacrylic acid (MAA), allyl-β-CD and acrylonitrile (AN), and allyl-β-CD and methyl methacrylate (MMA) as the binary functional monomers. MAA-linked allyl-β-CD MIPs (M-MAA) were characterized by Fourier transform-infrared (FT-IR) spectroscopy and a scanning electron microscope (SEM). Based upon the results, M-MAA polymers generally proved to be an excellent selective extraction compared to its references: AN-linked allyl-β-CD MIPs (M-AN) and MMA-linked allyl-β-CD MIPs (M-MMA). M-MAA polymers were eventually chosen to run through a molecularly imprinted solid-phase extraction (MISPE) micro-column to enrich CLEN residues spiked in pig livers. A high recovery was achieved, ranging from 91.03% to 96.76% with relative standard deviation (RSD) ≤4.45%.     

上海市中小学生创新素养培养调查研究

本研究以上海市四所重点中学创新实验班、两个创新教育实验区为调研对象,对上海市中小学及校外教育机构、教育行政管理部门等单位在中小学生创新素养培养方面的工作进展和教育现状进行了调查研究,在现状描述的基础上,分析了当前上海创新教育的开展特点和存在问题,并提出了相应的政策建议.     

浅谈《政府工作报告》中词汇英译的几点注意事项

中文政治文献翻译要高度忠实,但为了达到对外宣传的目的,中国《政府工作报告》的英译本总体词汇特征应接近于本族语中同体裁的文本特征,被目的语者接受。本文浅谈了《政府工作报告》词汇英译的几点注意事项。     

RIA:数字图书馆发展的新契机

文章从介绍一种新兴技术RIA(Rich Internet Applications)入手,阐述了RIA概况,探讨了RIA在数字图书馆的应用及其对数字图书馆发展的促进作用,为新技术在图书馆领域的运用开启新的思路。     

Single lithium-ion channel polymer binder for stabilizing sulfur cathodes

Lithium–sulfur batteries have great potential for high-performance energy-storage devices, yet the severe diffusion of soluble polysulfide to electrolyte greatly limits their practical applications. To address the above issues, herein we design and synthesize a novel polymer binder with single lithium-ion channels allowing fast lithium-ion transport while blocking the shuttle of unnecessary polysulfide anions. In situ UV–vis spectroscopy measurements reveal that the prepared polymer binder has effective immobilization to polysulfide intermediates. As expected, the resultant sulfur cathode achieves an excellent specific capacity of 1310 mAh g⁻¹ at 0.2 C, high Coulombic efficiency of 99.5% at 0.5 C after 100 cycles and stable cycling performance for 300 cycles at 1 C (1 C = 1675 mA g⁻¹). This study reports a new avenue to assemble a polymer binder with a single lithium-ion channel for solving the serious problem of energy attenuation of lithium–sulfur batteries.     

Centralized security-guaranteed filtering in multirate-sensor fusion under deception attacks

In this paper, the centralized security-guaranteed filtering problem is studied for linear time-invariant stochastic systems with multirate-sensor fusion under deception attacks. The underlying system includes a number of sensor nodes with a centralized filter, where each sensor is allowed to be sampled at different rate. A new measurement output model is proposed to characterize both the multiple rates and the deception attacks. By exploiting the lifting technique, the multi-rate sensor system is cast into a single-rate discrete-time system. With a new concept of security level, the aim of this paper is to design a filter such that the filtering error dynamics achieves the prescribed level of the security under deception attacks. By using the stochastic analysis techniques, sufficient conditions are first derived such that the filtering error system is guaranteed to have the desired security level, and then the filter gain is parameterized by using the semi-definite programme method with certain nonlinear constraints. Finally, a numerical simulation example is provided to demonstrate the feasibility of the proposed filtering scheme.