A new local-world evolving network model

In some real complex networks, only a few nodes can obtain the global information about the entire networks, but most of the nodes own only local connections therefore own only local information of the networks. A new local-world evolving network model is proposed in this paper. In the model, not all the nodes obtain local network information, which is different from the local world network model proposed by Li and Chen （LC model）. In the LC model, each node has only the local connections therefore owns only local information about the entire networks. Theoretical analysis and numerical simulation show that adjusting the ratio of the number of nodes obtaining the global information of the network to the total number of nodes can effectively control the valuing range for the power-law exponent of the new network. Therefore, if the topological structure of a complex network, especially its exponent of power-law degree distribution, needs controlling, we just add or take away a few nodes which own the global information of the network.

Epidemic propagation on adaptive coevolutionary networks with preferential local-world reconnecting strategy

In the propagation of an epidemic in a population, individuals adaptively adjust their behavior to avoid the risk of an epidemic. Differently from existing studies where new links are established randomly, a local link is established preferentially in this paper. We propose a new preferentially reconnecting edge strategy depending on spatial distance （PR- SD）. For the PR-SD strategy, the new link is established at random with probability p and in a shortest distance with the probability 1 p. We establish the epidemic model on an adaptive network using Cellular Automata, and demonstrate the effectiveness of the proposed model by numerical simulations. The results show that the smaller the value of parameter p, the more difficult the epidemic spread is. The PR-SD strategy breaks long-range links and establishes as many short-range links as possible, which causes the network efficiency to decrease quickly and the propagation of the epidemic is restrained effectively.

A local-world evolving hypernetwork model

Complex hypernetworks are ubiquitous in the real system. It is very important to investigate the evolution mecha- nisms. In this paper, we present a local-world evolving hypernetwork model by taking into account the hyperedge growth and local-world hyperedge preferential attachment mechanisms. At each time step, a newly added hyperedge encircles a new coming node and a number of nodes from a randomly selected local world. The number of the selected nodes from the local world obeys the uniform distribution and its mean value is m. The analytical and simulation results show that the hyperdegree approximately obeys the power-law form and the exponent of hyperdegree distribution is 7 = 2 ＋ 1/m. Furthermore, we numerically investigate the node degree, hyperedge degree, clustering coefficient, as well as the average distance, and find that the hypemetwork model shares the scale-flee and small-world properties, which shed some light for deeply understanding the evolution mechanism of the real systems.

乡土世界中人的生存困境——论王鲁彦乡土小说

王鲁彦在20世纪20年代到40年代期间创作了许多体现当时乡土世界生活的乡土小说,其作品体现了浙东乡土世界中独特的民风、民俗、民情,更描摹出了当时民风、民俗、民情下的世情冷暖与人生困境。用文本细读的方式对王鲁彦的《黄金》《一个危险的人物》《菊英的出嫁》《阿卓呆子》等短篇小说中的乡土世界进行分析,进而阐释作品中所呈现的人的生存困境,并从中探寻乡土小说在当今世界的现实意义。

无线传感器网络容错低功耗自适应分簇算法

针对成簇阶段因缺少容错性而无法保证数据可靠性的问题,提出基于局域世界的无线传感器网络容错分簇算法。以局域世界的社团理论和符号网络结构平衡理论为根本,构建由多个簇组成的局域世界下无线传感器网络拓扑结构。融入势博弈和最优刚性子图的概念,根据集聚系数较小边的所在位置,优化网络拓扑结构。以优先级理念与带宽预留技术为支撑,设计容错机制。将节点与簇的剩余能量作为簇头选择依据,采用低功耗自适应集簇分层型协议获取容错分簇簇头,实现无线传感器网络容错分簇。经实验检验,所提算法能够有效解决节点失效过早、失效速率过快等问题,容错分簇后减少死亡节点与节点能耗,增加运行周期,加强吞吐能力。

Evolution model for scientific collaboration network with local-world information

In order to reveal the intrinsic properties of scientific collaboration networks, a new local-world evolution model on a scientific collaboration network is proposed by analysing the network growth mechanism. The act degree as the measurement of preferential attachment is taken, and the local-world information of nodes is taken into account. Analysis and simulation show that the node degree and the node strength obey the power-law distribution. Low average path length and high clustering coefficient are approved. Experiment indicates that the model can depict efficiently the topological structure and statistical characteristics of real-life scientific collaboration networks.

改进位姿估计环节的ORB-SLAM稠密建图算法

为提高ORB-SLAM2 (oriented fast and rotated brief, and simultaneous localization and mapping)系统的位姿估计精度并解决仅能生成稀疏地图的问题,提出了融合迭代最近点拟合(iterative closest point, ICP)算法与曼哈顿世界假说的位姿估计策略并在系统中加入稠密建图线程。首先通过ORB(oriented fast and rotated brief)特征点法、最小显著性差异(least-significant difference, LSD)算法和聚集层次聚类(agglomerative hierarchical clustering, AHC)方法提取点、线、面特征,其中点、线特征与上一帧匹配,面特征在全局地图匹配。然后采用基于surfel的稠密建图策略将图像划分为非平面与平面区域,非平面采用ICP算法计算位姿,平面则通过面与面的正交关系确定曼哈顿世界从而使用不同估计策略,其中曼哈顿世界场景通过位姿解耦实现基于曼哈顿帧观测的无漂移旋转估计,而该场景的平移以及非曼哈顿世界场景的位姿采用追踪的点、线、面特征进行估计和优化;最后根据关键帧和相应位姿实现稠密建图。采用慕尼黑工业大学(technische universit?t münchen, TUM)数据集验证所提建图方法,经过与ORB-SLAM2算法比较,均方根误差平均减少0.24 cm,平均定位精度提高7.17%,验证了所提方法进行稠密建图的可行性和有效性。

基于未知类别少样本学习的开放世界目标定位

开放世界目标识别中未知类别样本难以获取,这些样本无法有效参与训练,针对这个问题,提出基于未知类别少样本学习的开放世界目标定位方法。首先,利用伪标签生成模型,将背景区域中高目标性得分的目标区域标记为伪标签,为模型学习未知类提供少量样本,增强模型对未知类别的泛化能力;其次,设计两个分支共同学习目标特征,其一为目标性分支,其二为定位质量分支。前者专注于确定目标框内是否存在目标,后者则集中于评估目标框的质量,从目标存在性和目标定位质量两个维度提取和理解目标特征。同时,目标性分支联合训练真实标签与伪标签样本增强对未知类别的识别能力,定位质量分支通过学习高质量的真实标签样本并排除伪标签样本,以减少噪声干扰。最后在COCO数据集上对该方法进行有效性评估,结果显示,与其他方法相比,所提方法具有较为出色的检测性能。

马克思主义本土化的争论、推进原因与现实成就——基于国外共产党的视角

苏东剧变以后,国外共产党就如何坚持马克思主义,在本土化与“国际主义”问题上产生了分歧。虽然有少数国外共产党对马克思主义本土化持质疑与否定的态度,但是绝大多数共产党依然从历史、现实、认识、实践的角度,明确了结合具体国情推进马克思主义本土化,探索适合本国特色的社会主义发展道路的重要性,并在理论创新与实践探索上取得了丰硕成果,开创了马克思主义在21世纪发展的新图景,对推动世界社会主义振兴具有重要意义。21世纪国外共产党对马克思主义本土化的探索,是当代马克思主义研究的重要内容,对这一问题的研究也是准确把握世界社会主义发展动向及前景的必然要求。

Epidemic spreading behavior with time delay on local-world evolving networks

An improved susceptible-infected-susceptible(SIS)model in the local-world evolving network model is presented to study the epidemic spreading behavior with time delay,which is added into the infected phase.The local-world evolving model displays a transition from the exponential network to the scale-free network with respect to the degree distribution.Two typical delay regimes,i.e.,uniform and degree-dependent delays are incorporated into the SIS epidemic model to investigate the epidemic infection processes in the local-world net-work model.The results indicate that the infection delay will promote the epidemic outbreaks,increase the prevalence and reduce the critical threshold of epidemic spreading.It is also found that local-world size M will considerably influence the epidemic spreading behavior with time delay in the local-world network through large-scale numerical simulations.Simulation results are also of relevance to fight epidemic outbreaks.

Real-World Evidence in Localized Pancreatic: Coping with Uncertainty in Unselected Populations

Background: Localized pancreatic cancer, including resectable (R), borderline resectable (BR) and locally advanced unresectable disease (LAU), is considered in clinical guidelines for diverse treatment options based on clinical trials in selected populations. Hence, exploring with real world evidence (RWE) clinicians’ preferences for treatment options and their results seems pertinent. Methods: In a set of consecutive patients with localized pancreatic cancer assisted in a third level hospital from January 2013 to December 2022, medical records, symptoms, diagnostic process, distribution between subtypes, and treatment plans, with safety and efficacy results, were assessed. Results: A total of 152 patients with localized disease were included (43.4% R, 21.0% BR, 33.6% LAU). The population characteristics exemplified differences between daily practice and clinical trials. Tumor location and symptoms were as expected. Treatment plan was conditioned by PS or comorbidities in 23.0% of patients. In patients with R disease, surgery followed by different adjuvant chemotherapy (CT) regimes was the antineoplastic treatment of choice (64.8%) with efficacy results (OS 37.5 months;95% CI 18.4 - 56.7), in the range of contemporary standards. The common use of neoadjuvant CT for BR disease (94.4%), with surgery in 50% of them, and its results (OS 30.8 months;95% CI 10.5 - 51.2) reflected current controversies of treatment recommendations and evolution in this scenario. Paliative CT with or without radiotherapy was the standard specific treatment in LAU disease (95.1%) with survival results (PFS: 10.8 months;95% CI 8.8 - 12.7. OS: 20.3 months;95% CI 13.5 - 27.2) that justify the distinct character and the specific study of this entity. Conclusion: RWE for localized pancreatic cancer aroused from the analysis of this population confirms the distinct nature of patients assisted in daily practice, as well as mirrors the complexity of decision making in clinical assumptions in which achieving stronger evidence should be paramount.

新工科背景下“服务地方,面向国际”的《汽车电器与电子技术》课程建设实践研究

《汽车电器与电子技术》课程的特点是具有理论多且难,而且实践性要求高。文章立足本省汽车产业快速发展的实际情况,结合本校办学条件,以《汽车电器与电子技术》课程建设为例,探讨在新工科背景下如何开展以“服务地方,面向国际”人才培养路径的实践研究。通过对本地汽车产业实际需求和国际汽车技术发展趋势的分析,基于当前《汽车电器与电子技术》课程的教学痛点分析,提出了一系列教学改革策略,包括课程内容更新、实践教学设计、行业合作和国际化视野培养、考核方式改革等。研究结果表明,这些策略对于提升学生能力和课程质量具有重要意义。同时,文章的研究对于推动新工科建设和促进产学合作也具有一定的借鉴价值。

粮食安全中国化的使命、任务、现实挑战及政策建议

在全球粮食供需矛盾愈益突出的背景下,唯有准确把握粮食安全中国化的使命、任务,深入剖析农业资源配置效率不高和增值增效空间受限及农业发展缺乏内在动力的体制机制原因,有效借鉴发达国家建设农业强国及发展现代农业的成功经验做法,始终把改革创新作为农业发展持续向好、农民生活不断改善、农村社会和谐稳定的根本动力,按照“藏粮于地、藏粮于技”战略和“不与粮争地、不与人争粮”原则,坚持走中国特色农业现代化道路,瞄准国家粮食安全战略要求,在化解深层次矛盾上狠下功夫,持续强化农业科技和体制机制集成综合创新,加快推动以生产要素重组和优化升级为核心的农业产业革命,充分释放各类要素的合作潜能及发展潜力,并通过全方位夯实中国特色粮食安全保障体系,才能确保农业稳产增产、农民稳步增收、农村稳定安宁。

世界文化遗产保护地方立法研究

《保护世界文化和自然遗产公约》要求世界遗产所在国应通过适当的法律措施对世界遗产进行保护管理。目前,我国共有39项世界文化遗产和4项世界文化与自然双遗产。各项遗产在遗产分布、遗产形态、遗产管理区域等方面具有特殊性。随着新时代文物工作方针的出台,以及国际世界文化遗产保护理念的发展,地方世界遗产保护条例需要在现有法律框架的基础上,结合新理念和新要求,突出地方特色,完善世界遗产保护法律体系。

宋代监察权威的生成机理及价值意蕴

宋代自上而下形成了中央台谏、外台监司、州级通判的集中统一、权威高效的垂直领导监察体制。宋代监察权在运作中呈现出能够有效制衡行政、司法权的权威性特质。宋代监察权威首先源自监察官自身所具备的优秀监察品质;其次,其内生于作为皇帝的“耳目之官”所担负的维护封建“纲纪”的庄严使命;再次,宋代监察官铨选、回避制,从制度上保障了监察权威;最后,宋代监察官是“天下公议”化身的政治话语,从舆论上强化了监察权威的合理性、正当性。宋代监察权威在彰善瘅恶、澄清吏治、整肃“纲纪”、关注民瘼、保持政治清明等方面均起着扛鼎作用,其不仅能够为当代监察权威的构建提供丰富的镜鉴和启迪,甚或可以进行创造性转化与创新性发展。

我国世界文化遗产地方立法的检视与完善

为规范和加强世界文化遗产保护管理,越来越多地方针对其辖区内世界文化遗产制定了专项保护管理法规。但由于立法权限受限、上位法制度滞后,以及立法时限与配套资源制约等原因,当前此类地方立法部分条款存在法律概念冲突、重复立法、抵触上位法、超越立法权限等问题,立法的体系性有待提升。解决上述问题不仅要求完善地方立法理念与技术,并适时加强协同立法,还要求完善世界遗产保护管理上位法,不断健全我国文化遗产法制体系。

景观人类学视角下的福建洪坑土楼遗产地栖居景观保护与再创生研究

后遗产时代,遗产地普遍面临着地方性衰退、真实性破坏、社群分化和空间同质等诸多问题,反观也创生出一种全新的遗产地方社会关系和复杂多变的地方栖居景观面貌。本文以世界文化遗产福建洪坑土楼为例,结合景观人类学研究视角,通对人居住屋形式、区域生计模式、族群社会关系和遗产保护治理等的梳理分析,探讨地方社会主体能动和外部社群客位介入对洪坑土楼遗产地栖居景观进行的场所建构和空间生产机制。研究表明,洪坑土楼遗产地栖居景观实践不但是一个地方社会空间化的自我建构过程,也是一个乡土空间社会化的扩散生产过程,渗透着不同文化体验对土楼遗产地栖居景观现代性的催化和塑造。景观人类学视角揭示的洪坑土楼遗产地栖居景观形态塑造过程及其彰显出来的地方机制,对于推动福建土楼遗产地现代适应和可持续发展具有特殊意义和时代价值。

“大成若缺,其用不弊”——论黎紫书《流俗地》的叙事特征

作为马华文坛上独树一帜的作家,黎紫书的小说向来不落窠臼,其新作《流俗地》以盲女银霞看不见的“视域”为辐辏点,折射出南洋华人底层众生相,娓娓道来小人物俗世中的沉浮悲欢。“大成若缺,其用不弊”,“盲”作为一种方法论,成为黎紫书践行其小说实践的有效途径。黎紫书运用在地化经验深情回望故乡,写出马来华人隐秘的爱与痛。与此同时,《流俗地》的“写实”倾向也标志着黎紫书的创作新变,显示出马华文学崭新的特质与可能性。

山的文化逻辑:苍山与山地人群互构的精神世界

在大理苍山上下,山地人群与苍山不断互构,逐渐在当地文化中形成一个依山而筑的精神世界。人们依其与先辈世代联结、与同代交互往来;“苍山之灵”,通过“生死路”在各村落中的山神庙中得以具象化,带给山地人群永恒的丰产与福泽,构成人与山互动的既定秩序,维系地方社会的安定与和谐。经由“文明下山”的实践,山地人群建构了与精神世界相契合的文化逻辑。概言之,人们通过对生死观念、山神信仰的实践与苍山不断互动,最终使得山与盆地在人们的精神层面合为一个完整的“他界”。由此,山既可视为连接天地、构造整体空间之轴,也可视为地方社会的秩序之轴。

百年中国乡土文学的叙事结构分析——以格雷马斯矩阵理论为介质

百年中国乡土文学研究,层层累积,论著多多,但也存在大量研究成果陈陈相因,理论视角单一,研究思路僵化,许多结论属于同义反复的重复性研究。面对新世纪中国乡土文学的新动态、新格局,今人应该有新的思路,新的突破。借鉴普罗普、格雷马斯、海登·怀特诸家方法和恩格斯的历史合力理论,对乡土小说“乡村故事的视角、立场与态度”“示众、‘看与被看’和复仇”“还乡、入乡与进城”“乡村政治伦理与权力结构分殊”等叙事结构进行考察,意在建构中国乡土小说的叙事模型,把中国乡土小说的创生、变革经验研究和乡土小说理论建设推向新的高度,彰显百年中国乡土文学的丰富多彩、廓大境界和中国经验,凸现其对世界文学的卓越贡献。