基于Aging theory社交网络用户关注点交互影响演化模型

【目的/意义】研究社交网络平台用户关注点演化对掌握舆情，制定管理决策具有重要作用。【方法/过程】本 文提出一种基于 Aging theory的关注点交互影响演化模型。该模型将每阶段营养素重新设计为外部来源与其他关 注点转移两类，使用关注点间的相似性作为第二类营养素度量演化过程中关注点交互影响效应，并根据两类营养 素不同比例将关注点划分为突发型与渐变型两种。【结果/结论】通过“厦门 BRT爆炸”的新浪微博数据集验证，该模 型能够刻画上述两种关注点的演化趋势，并对演化原因进行解释。     

Subspace predictive control with the data-driven event-triggered law for linear time-invariant systems

In this paper, a subspace predictive control (SPC) method with a novel data-driven event-triggered law is proposed for linear time-invariant systems with unknown model parameters. Based on the conventional SPC method, the event-triggered law is introduced to substitute the typical receding horizon optimization, which reduces the data computation load of the traditional SPC method. The key parameters of the event-triggered law are derived by the Q-learning method via system data and the input-to-state stability of the system can be ensured with the designed event-triggered law. The simulation results illustrate the effect and merits of the proposed method with comparisons.     

融入隐私关注的社交网络服务与用户间关系的 演化博弈模型研究

【目的/意义】近年来,社交网络服务的隐私关注变得日益严重。先前关于隐私关注的研究大多集中在无差 别节点上（仅针对用户行为）,但却忽略了用户在社交网络环境中有着长期的社交行为。【方法/过程】创新性地研究 了基于隐私关注和社交网络服务与用户双方利益的长期演化博弈,并首次将隐私关注作为一个因素引入到博弈 中,通过建立收益矩阵来构建双方利益的演化博弈,最后使用算法进行仿真验算。【结果/结论】实验结果显示：社交 网络服务商泄露用户隐私的比例与用户披露隐私信息的比例密切相关;用户的安全收益会提升其对隐私信息披露 比例;隐私披露成本有利于提升用户警惕性、减缓隐私信息的泄露,但这种正面影响只在一定范围内有效;加大隐 私泄露惩罚力度有利于缓解隐私泄露。     

沈约文学观辨析

在文学活动中,沈约对文学的认识和理解是沿着陆机"诗缘情而绮靡,赋体物而浏亮"这一诗学思路的,他把情感和审美形式看作文学的本质属性而又更侧重于情感表现形式上的审美要求.在沈约的文学观念里,其所强调的"情"是作家内心丰富的自然真切的各类情感、意绪、志趣,是反映作家独特才性的情感、思想,是凭借文采、音韵等审美要素审美化了的情感.而词采、音律等审美要素则又应当是本于情感之自然抒发的词采、音律.     

火焰原子吸收光谱法测定两种奶茶粉中锰

将微波消解技术与火焰原子吸收光谱（FAAS）法相结合,对奶茶粉样品中的Mn含量进行了测定。在选定的仪器工作条件下,测定Mn的特征浓度为0.059μg/mL/1%;回收率为89.1%—110.4%;RSD小于1.36%;方法简便、快速,测定结果令人满意。     

Factors influencing university teachers’ use of a mobile technology-enhanced teaching (MTT) platform

Educational technology research and development - The main purpose of this study was to examine the critical factors influencing university teachers’ use of a mobile technology-enhanced...     

Multimodal channel cancer chemotherapy by 2D functional gadolinium metal–organic framework

2D nanomaterials generally exhibit enhanced physiochemical and biological functions in biomedical applications due to their high surface-to-volume ratio and surface charge. Conventional cancer chemotherapy based on nanomaterials has been hindered by their low drug loading and poor penetration in tumor tissue. To overcome these difficulties, novel materials systems are urgently needed. Hereby, the lanthanide-based porphyrin metal–organic framework (MOF) nanosheets (NSs) with promising cancer imaging/chemotherapy capacities are fabricated, which display superior performance in the drug loading and tumor tissue penetration. The biodegradable PPF-Gd NSs deliver an ultrahigh drug loading (>1500%) and demonstrate the stable and highly sensitive stimuli-responsive degradation/release for multimodal tumor imaging and cancer chemotherapy. Meanwhile, PPF-Gd NSs also exhibit excellent fluorescence and magnetic resonance imaging capability in vitro and in vivo. Compared to the traditional doxorubicin (DOX) chemotherapy, the in vivo results confirm the evident suppression of the tumor growth by the PPF-Gd/DOX drug delivery system with negligible side effects. This work further supports the potential of lanthanide-based MOF nanomaterials as biodegradable systems to promote the cancer theranostics technology development in the future.     

光包交换城域网的系统仿真

This paper introduces architectures of two types optical packet-switched metropolitan area networks and their media access control protocols.We have designed ralated network simulation systems.With these simulation systems,the characteristics and performanceof the two MANs can be achieved.     

网络时代图书馆读者服务工作研究

本文从网络环境下图书馆的读者服务工作入手，对其所涉及的信息资源，读者及读者服务工作进行一剖析，具体探讨了网络环境下图书馆的读者服务工作面临的机遇与挑战，并对怎样开展网络时代的图书馆读者服务工作提出了建议。     

融入改进SIR模型的移动社交网络谣言传播用户 群体动态演化仿真研究

【目的/意义】近年来移动社交网络的高速发展推动了学术界对网络舆情的关注,网络谣言作为其中的重要 组成部分越来越受到监管部门的关注。本文通过建模仿真对谣言传播群体动态演化特征进行分析,以期为有关部 门有效应对和控制移动社交网络谣言提供借鉴。【方法/过程】本文以经典SIR模型为基础,加入移动社交网络用户 数量等影响因子进行优化,并结合传播动力学理论构建了移动社交网络谣言传播的参与群体动态演化模型,最后 使用MATLAB等软件实现模型和数值仿真。【结果/结论】实验结果显示：谣言在前期发展阶段的传播速度最快,杀 伤力也最大;移动社交网络环境对谣言传播有促进作用;网络容量越大,谣言传播的范围越大;本文模型通过仿真 验算,证明可以用于对移动社交网络环境下的谣言传播进行仿真。