Research on the Dissemination Mechanism and Guiding Tactics of Public Opinion in Catastrophic Event Network

This paper conducts the analysis on the dissemination mechanism and guiding tactics of public opinion in catastrophic event network. Opinion evolution mechanism can be roughly divided into two classes. One is the belief of people based on their neighbors, on the basis of the public opinion is in the social network of acquaintances. Such networks are mostly using cellular automata model for data simulation, the results of numerical simulation are speci？ c to stabilize near the critical value show that the system will reach a critical stable state. The network information collection is the source of network public opinion monitoring its breadth and depth determine the monitoring results for the clear theme of public opinion information collection. Under this basis, this paper proposes the novel idea of making the dissemination mechanism easier. The proposed idea is novel and necessary, the effectiveness is proved via the theoretical analysis.

CAE Supported Ornamental Flame Product Design-Vortex Flow Guiding with Fuel Lift Mechanism

The vortex flame design process was investigated. Combine qualitative and CAE （computer-aided engineering） simulation proposed to fulfill the functional requirement. Guidance channel can produce an ornamental flame with acceptable height. The lift mechanism comprises a supporting member and bearing and allows moving to the predetermined height. It allows a user to add fuel and cleaning base parts safely. Rigid body linkage and flow field simulated enables fine tune of geometric parameters. Functional test and measurement are carried out to confirm the product features. The measured average temperature of the metal chassis is 37.25℃, and that of glass is 141℃.

Formation Mechanisms and Geomorphic Evolution of the Erlian Mudflow Fans, Eastern Guide Basin of the Upper Reaches of Yellow River

Several argillaceous platforms lie along the Yellow River（YR） of the eastern Guide Basin, northeastern Tibetan Plateau, and their compositions, formation processes, and geomorphic evolution remain debated. Using field survey data, sample testing, and high-resolution remote sensing images, the evolution of the Erlian mudflow fans are analyzed. The data show significant differences between fans on either side of the YR. On the right bank, fans are dilute debris flows consisting of sand and gravel. On the left bank, fans are viscosity mudflows consisting of red clay. The composition and formation processes of the left bank platforms indicate a rainfall-induced pluvial landscape. Fan evolution can be divided into two stages： early-stage fans pre-date 16 ka B.P., and formed during the last deglaciation; late-stage fans post-date 8 ka B.P.. Both stages were induced by climate change. The data indicate that during the Last Glacial Maximum, the northeastern Tibetan Plateau experienced a cold and humid climate characterized by high rainfall. From 16–8 ka, the YR cut through the Erlian early mudflow fan, resulting in extensive erosion. Since 8 ka, the river channel has migrated south by at least 1.25 km, and late stage mudflow fan formation has occurred.

PERFORMANCE ANALYSIS AND KINEMATIC DESIGN OF PURE TRANSLATIONAL PARALLEL MECHANISM WITH VERTICAL GUIDE-WAYS

Performance analysis and kinematic design of the 3-PUU pure translational parallel mechanism with vertical guide-ways are investigated. Two novel performance indices, the critical slider stroke and the main section area of workspace, are defined; The expressions of two other indices, i.e. the global dexterity and global force transfer ratio are revised based on the main section of workspace. Using these indices, performance changes versus the varieties of dimensional parameters of mechanism are investigated in detail and the graphic descriptions of change tendencies of the performance indices are illustrated. By means of these obtained graphic descriptions, kinematic parameters for the 3-PUU pure translational parallel mechanism with better characteristics can be directly acquired.

A New Thread Guide Mechanism of Rubbed Roving Frame

A new thread guide mechanism of a rubbed roving frame is developed, which consists mainly of a plate cam, a linkage and an air bag spring. Characteristics and design parameters of the air spring are explored in this study. Based on analyses of winding technology for this kind of package, the kinetic laws of the thread guide is put forward. General design equations of the cam profile are derived, and common kinetic laws of II linkage group which is used for such mechanism design is proposed. It proves theoretically that it is practicable. The experimental results indicate that it can meet the needs of technological demands, and the new thread guide mechanism has been used successfully on textile machines.

Non-Perturbative Guiding Center and Stochastic Gyrocenter Transformations:Gyro-Phase Is the Kaluza-Klein 5^(th) Dimension also for Reconciling General Relativity with Quantum Mechanics

The non perturbative guiding center transformation is extended to the relativistic regime and takes into account electromagnetic fluctuations. The main solutions are obtained in covariant form: the gyrating particle and the guiding particle solutions, both in gyro-kinetic as in MHD orderings. Moreover, the presence of a gravitational field is also considered. The way to introduce the gravitational field is original and based on the Einstein conjecture on the feasibility to extend the general relativity theory to include electromagnetism by geometry, if applied to the extended phase space. In gyro-kinetic theory, some interesting novelties appear in a natural way, such as the exactness of the conservation of a magnetic moment, or the fact that the gyro-phase is treated as the non observable fifth dimension of the Kaluza-Klein model. Electrodynamics becomes non local, without the inconsistency of self-energy. Finally, the gyrocenter transformation is considered in the presence of stochastic e.m. fluctuations for explaining quantum behaviors via Nelson’s approach. The gyrocenter law of motion is the Schrödinger equation.

Determining of Optimal Dimensions of Compliant Spring Guiding Systems

Compliant mechanisms transfer an input force or displacement to another point through elastic body deformation. The field of compliant mechanisms is expected to continue to grow as materials with superior properties are developed. The paper takes into consideration some typical spring guiding systems, being able to realize translating planar displacement of the link. Some types of compound spring guiding systems, such as S-shaped guiding spring system, U-shaped guiding spring system and four spring guiding system with additional rigid-body link have been considered and analyzed as compliant structures. The mobility as well as guiding accuracy of the developed compliant mechanisms, that is, their capability to realize translating planar displacement of the link, have been researched, and the optimal dimensions of the mechanism have been determined in order to provide minimal guiding inaccuracy.

新时代我国行政区划的制度设计、目标指向与优化策略

新时代在完善优化行政区划制度设计过程中,坚持发展与治理并重的新理念是认识前提,加强党对行政区划工作的集中统一领导是根本保障,持续推动法治建设是关键支撑,健全论证评估机制与方法是基本路径。在目标导向方面,应重点关注三项新课题:以优化基层行政区划为主要着力点,提升超大特大城市的资源承载能力;通过优化乡镇行政区划设置,推动以县城为重要载体的新型城镇化;通过优化收缩型城市和“小县”的行政区划设置,助推区域协同高质量发展。作为完成上述目标的保障机制,要在充分发挥党的全面领导、协调各方作用基础上强化党政部门协同,在明确价值导向前提下健全论证与评估体系,系统总结我国行政区划设置的历史经验,提升调整方案的明确性,减少调整的“后遗症”。

埋头弹步枪导轨曲线槽的设计分析

为研究不同导轨曲线槽形状对埋头弹步枪导轨-弹膛机构运动特性以及弹膛突耳与导轨曲线槽接触力的影响,以某中口径埋头弹步枪为对象,基于一次函数、二次函数、三次函数和五次多项式函数设计了4种导轨曲线槽,建立了相应的导轨-弹膛机构的三维模型,采用Adams建立了导轨-弹膛机构的虚拟样机模型,利用Abaqus建立了导轨-弹膛机构有限元模型,并进行了仿真研究与分析。仿真结果表明:选用不同导轨曲线槽时,活动弹膛升降速度、导轨曲线槽与突耳间的接触力、以及导轨曲线槽的接触应力明显不同,最大接触应力主要分布在导轨曲线槽起始位置和终止位置;选择五次多项式函数作为导轨轮廓曲线时,导轨曲线槽起始位置和终止位置的接触应力较其他导轨曲线槽的接触应力小。

指导性案例制度的运行思路再定位

指导性案例制度旨在通过各级法院参照适用前案的方式,推进法律适用的统一。但该制度的运行存在效力不明确、供给量不足、适用范围不广等诸多问题。鉴于遵循先例以实现同案同判的运行机制与指导性案例以确保法律适用统一的运行机制具有相似性,通过分析判例法上遵循先例的运行条件,融入指导性案例的运行环境观察其运行效果,发现由于两者的法律适用逻辑存在根本性差异,指导性案例制度实现法律适用统一的效率性、稳定性、权威性和发展性等方面皆不尽如人意。指导性案例应当回归其指导示范价值而非硬性拘束,并围绕覆盖司法分歧和增加案例竞争,完善相应的遴选与退出机制。

联合线性引导与网格优化的混凝土裂缝分割

针对混凝土表面裂缝分割过程中分割精度低、细微裂缝漏分和背景干扰等问题,提出一种联合线性引导和网格优化的裂缝分割模型。首先,在主干网络中引入多分支线性引导模块,通过自适应单维度池化增强网络对裂缝线性结构的表达能力,让不同区域的裂缝建立联系,增强全局上下文信息感知能力,提高网络分割精度;然后,提出网格细节优化模块,通过分区-优化-合并三步骤,将整个空间域划分为若干个空间网格,提取空间网格中的细微裂缝信息,防止细微裂缝漏分;最后,在主干网络的跳跃连接处嵌入混合注意力模块,在空间和通道双维度突出裂缝特征,减少背景干扰。在Deepcrack537,Crack500和CFD裂缝数据集上,所提模型的IoU值分别达到77.07%,58.96%和56.55%,F1-score值分别达到87.05%,74.19%和72.24%,明显优于大多数现有方法,具有更高的分割精度。

双重信息引导的蚁群算法求解绿色多舱车辆路径问题

针对当前实际运输中广泛存在的绿色多舱车辆路径问题(GMCVRP),文章提出一种双重信息引导的蚁群优化算法(DIACO)进行求解.首先,在DIACO的全局搜索阶段,重新构建传统蚁群优化算法(TACO)中的信息素浓度矩阵(PCM),使其同时包含客户块信息和客户序列信息,即建立具有双重信息的PCM(DIPCM),从而更全面学习和累积优质解的信息;采用3种启发式方法生成较高质量个体,用于初始化DIPCM,可快速引导算法朝向解空间中优质区域进行搜索.其次,在DIACO的局部搜索阶段,设计结合自适应策略的多种变邻域操作,用于对解空间的优质区域执行深入搜索.再次,提出信息素浓度平衡机制,以防止搜索陷入停滞.最后,使用不同规模的算例进行仿真测试和算法对比,结果验证了DIACO是求解GMCVRP的有效算法.

全旋转指向式导向钻井工具结构设计与仿真

为了提高全旋转指向式导向钻井工具的设计效率,缩短研发周期,笔者首先设计了该钻井工具的导向执行机构,简化导向执行机构的空间机构模型,通过自由度的计算,得出了该机构具有确定的运动。再对该钻井工具的结构组成和导向原理进行分析,得到了其导向控制方法是通过控制全旋转指向式导向钻井工具的双偏心环和旋转外套的角位移关系,调节其工具角和工具面角,实现导向钻井。最后利用SolidWorks和ADAMS软件对钻井工具虚拟样机进行三维实体建模及运动仿真,仿真结果表明该钻井工具可以实现工具面角(0~360)°和工具角(0~5)°的无级调节,验证了所设计的全旋转指向式导向钻井工具结构和导向原理的可行性,为原理样机的加工奠定了基础。

关于医院建筑机电工程创新的思考

现今医院建筑机电工程模式与当今快速发展的时代背景不协调,妨碍了机电工程实现功能需求和“双碳”目标的要求,需要创新。分析了现今医院建筑机电工程模式的弊病;提出了在完成机电系统综合的基础上,与建筑工程剥离,作为完整独立的工程项目单独实施,在整个过程中以运维作引导,充分发挥设计龙头作用;基于医院建筑电气化、电力需求响应,探讨了医院建筑机电工程实现功能目标且经济低碳的运维策略;最后指出医院建筑机电工程创新的直接受益者和主导者是医院。

课程思政运行机制的构建研究

课程思政建设是新时代落实立德树人根本任务的重要举措,构建健全的机制是推动课程思政建设的关键。课程思政运行机制的功能主要体现在评价作用、导向作用、调节作用、保障作用四个方面。尽管课程思政在运行机制建设方面取得了一定成绩,但仍然存在目标未完全确立、控制力较弱、保障不到位等问题。为此,必须构建课程思政建设的动力机制、导向与组织机制、协同育人机制,以推动课程思政的建设。

美日欧产业链安全保障机制的逻辑解构与比较分析

国际局势急剧变化导致全球产业链重构,以美日欧为代表的发达国家出台了一系列产业链安全保障措施,显著影响国际分工体系。以“指导思想—政策工具”为分析框架,可以相对全面而有效地解构其产业链安全保障机制的逻辑。在指导思想方面,美国旨在追求“美国优先”的绝对安全与霸权地位,日本总体继续坚持“综合安全保障”的理念,欧洲国家则主要强调“战略自主”。政策工具设计分三个层面实施:在国家层面,美日欧都强调重塑制造业生产能力,但侧重领域不同;在区域层面,美日欧更强调近岸外包与友岸外包并行,并辅之以基础设施投资合作;在全球层面,构建高标准国际经贸规则和强化国际技术标准制定权是其关键诉求。展望未来,一定时期内美日欧的产业链安全保障机制的实施将对中国产业链安全造成较大挑战,以区域合作为关键机制的多链并行或将成为重要趋势。

表面织构对高速插针机构导轨的表面摩擦性能影响

以插针机中具有表面织构的导轨摩擦副为研究对象,考虑表面粗糙度、载荷波动、速度变化、时变油膜挤压效应等因素,分析表面织构对其摩擦性能的影响。应用计算机模拟生成具有自相关函数的粗糙表面,将Greenwood和Tipp建立的粗糙度接触模型以及Patir和Cheng修正后的平均油膜流体润滑模型耦合构建混合摩擦模型,通过MATLAB软件计算出凸轮的1个转动周期内的每个时刻的油膜压力、微凸体压力、油膜厚度。分析了混合润滑阶段摩擦副的油膜压力分布特点,以及织构数量、表面粗糙度、表面织构尺寸参数对摩擦副润滑特性的影响。结果表明:当底座摩擦副粗糙度方差增大时,油膜压力随之减小;微型凹坑半径取60μm,面积占有比取40%,微型凹坑深度取5μm时摩擦副取得最优润滑效果。

丘陵山地桑叶采收机转运装置设计与试验

针对丘陵山地桑叶采收机械缺乏、桑叶采摘收集困难、手工采摘劳动强度大等问题,研制一种丘陵山地桑叶采收机,并着重对转运装置进行设计与试验。首先分析桑叶采收机工作环境与桑叶采收流程,完成转运装置接料机构、导料机构、送袋机构的工作原理分析与结构设计计算。其次根据设计参数制作出桑叶采收机样机,在丘陵山地桑园进行转运装置试验。最后根据试验得到结论:桑叶采收机转运装置拨料器转速为80 r/min,自动脱钩长度尺寸b1=25 mm、宽度尺寸b2=25 mm、深度尺寸b3=15 mm,挂钩厚度h3=8 mm时,接料机构转运过程桑叶平均转运率为95.78%,导料机构桑叶平均入袋率为97.88%,送袋机构掉袋率为1.25%,自动脱袋成功率为98.75%,桑园田间试验表明桑叶采收机转运装置可以满足桑叶采收的功能需求,验证设计的正确性及可行性。

数智赋能研究生“导学思政”的内在机理和行动逻辑

深入推进数智赋能研究生“导学思政”建设是提升研究生思想政治教育的内在要求、遵循研究生人才培养规律的现实需求、落实立德树人根本任务的必然选择。厘清数智化和研究生导学思政两个基本概念的内涵,通过对研究生“导学思政”的教育对象、教育内容和教育过程数智化赋能变化的阐释,明确数智化赋能研究生“导学思政”的本质,分析其实践困境,科学提出“核心圈层—关键圈层—辐射圈层”逐级递进的行动逻辑。

基于语义引导神经网络的人体动作识别算法

近年来,采用深度前馈神经网络对骨骼关节的三维坐标建模成为了一种趋势。但网络识别准确率低、巨大的参数量以及实时性差仍然是基于骨骼数据动作识别领域中急需解决的问题。为此,提出一种基于语义引导神经网络(SGN)改进的网络模型。首先,在原网络中引入了非局部特征提取模块用于增强其在高级语义指导模型训练和预测的表现,降低了其在自然语言处理任务中的计算复杂性和推理时间;其次,引入注意力机制学习每个图卷积网络层的通道权重并减少通道间的冗余信息,进一步提高模型的计算效率和识别准确率;此外,以可变形卷积模块动态学习不同图卷积网络(GCN)层通道的权重,并有效地聚合不同通道中的关节特征用于网络最后的分类识别,从而提高特征信息的利用率。最后,在NTU RGB+D和NTU RGB+D 120公开数据集上进行人体动作识别实验。实验结果表明,所提出的网络比大多数网络小一个数量级,并且在识别准确率上明显优于原网络和其他一些先进的算法。