佤族盟誓文化形成的历史原因及其属性构成

佤族盟誓文化是在特殊的历史条件下产生、发展并保留至今,文中阐述了佤族盟誓文化产生的历史原因、佤族文化的属性、佤族盟誓文化的构成要素。

以汉语为例谈第二语言教学活动的经济原则

第二语言教学应当脱离经验型和随意性的状态 ,成为一种现代化的知识生产和创造过程。深入理解经济原则 ,从学科交叉和知识综合的角度出发 ,可以对第二语言教学活动的本质特点和教学模式有新的发现和更高的认识。

中国城市化进程中的人口社会重构——以上海为例的研究

城市人口郊区化扩散流、郊区农村人口城市化集聚流以及外来人口流,高强度辐合汇集于市郊新建城区或城乡结合部,是中国城市化进程中人口再分布的一大重要特点,由此导致城市近郊社区人口社会重构问题悄然凸现。近郊社区人口社会重构反映于人口来源、人户关系、受教育程度、经济活动构成等方面。人口社会重构问题产生的根源在于二元结构和城市化滞后。对城市人口郊区化、农村城市化、外来流动人口等诸多问题,都不能孤立地看待,而是亟需从社会重构的角度做综合性的深入研究。

关于中小学研学旅行的建议

中小学研学旅行是体验式教育理念和旅游业跨界结合的产物,是近年来出现的素质教育新形式,在践行社会主义核心价值观,全面推进立德树人工作,提升中小学生综合素质方面发挥重要的作用。就如何科学有效地开展研学旅行工作,以使研究性学习和旅行体验有机结合这一问题,文章从顶层设计、形式构成、课程设计、效果评价四个方面提出了一些意见和建议。

关于《文学理论教程》中几个问题的商榷

童庆炳先生主编的《文学理论教程》作为国家精品教材,享誉很高,但问题颇多。采取定点法,即在其全部五编中各选一节,仅就该节的问题就教于主编及相关同仁,也可于一斑而窥全豹。

Coal forming environments and their relationship to tectonic activity in the Cévennes Stephanian coal basin

Coal forming environments in the tectonically controlled intermontane Stephanian Cévennes coal basin (Massif central, France) show a complex interelationship between structural and sedimentological features. The study of the general structural features and the geometry of the coal beds developed during the different stages in the evolution of the basin, and the spatial relation of the lithofacial units to the early tectonic activities, lead the authors to suggest the following model. The synsedimentary faults that occurred as both intrabasinal and marginal faults controlled not only the spatial distribution, shape and thickness of the detrital rock units and coal seams, but also caused the inversion of the tectonic style. The marginal faults exercised important controls on the geometry of the basin and the distribution of lithofacial units. However due to the subsidence of the central part of the basin and the depocenter, and the to differences in the timing and intensity of the displacement the coal enrichment zones shifted both vertically and laterally. This eventually resulted in the inversion of the whole tectonic framework from semi graben through graben to a new semi graben. The style and rate of the tectonic movement and basin filling that occurred in the Stephanian Cévennes coal basin were in turn closely linked with the tectonic movement in the surrounding area. Therefore the authors propose that the environment and processes of coal formation in this basin are closely linked to its tectonic evolution.

Animal Production Systems in Algeria： Transformation and Tendencies in the Setif Area

Algeria registers only 0.25 ha of agricultural surface per capita. This indicates very low agricultural capacities. Otherwise agricultural activities are concentrated in a narrow fringe of the Northern part of the country where the dominant climate is semi-arid with very irregular rainfalls. A majority of farms produces its main part of income from cereal crops--livestock association system. However, the diversity of the climate and the physical environment, on one hand, and the agricultural policies on the other hand, induce major transformations in this system. Transformations are also the result of a significant demographic growth in rural area. In this context, significant issues appear in term of resource＇s uses and systems＇ sustainability. To shed light in the actual situation, this study, based on a survey of 90 owners, shows that： the intensification can constitute a threat on the pastoral resources; the weakness of the farms encourages the generalization of practices characterised by a weak feed autonomy and a bad management of stock fodders; the animal interspecific integration and partial intensification are positive if they follow models which ensure autonomy, performance and optimal pastoral resource management.

Abnormal activity detection for surveillance video synopsis

Video synopsis is an effective and innovative way to produce short video abstraction for huge video archives,while keeping the dynamic characteristic of activities in the original video.Abnormal activity,as the critical event,is always the main concern in video surveillance context.However,in traditional video synopsis,all the normal and abnormal activities are condensed together equally,which can make the synopsis video confused and worthless.In addition,the traditional video synopsis methods always neglect redundancy in the content domain.To solve the above-mentioned issues,a novel video synopsis method is proposed based on abnormal activity detection and key observation selection.In the proposed algorithm,activities are classified into normal and abnormal ones based on the sparse reconstruction cost from an atomically learned activity dictionary.And key observation selection using the minimum description length principle is conducted for eliminating content redundancy in normal activity.Experiments conducted in publicly available datasets demonstrate that the proposed approach can effectively generate satisfying synopsis videos.

民航客舱文化建设体系构建研究

本文根据系统工程理论和民航客舱文化内容及建设的具体要求,设计了客舱文化建设的三维结构体系——客舱文化构成内容维、建设业务活动阶段维、组织维,同时建立了构成内容-组织矩阵、构成内容-业务活动阶段矩阵和组织-业务活动阶段矩阵。通过三维结构和矩阵,实现客舱文化建设工作系统化、制度化、实效化。

Glyconanomaterials： Emerging applications in biomedical research

Carbohydrates constitute the most abundant organic matter in nature, serving as structural components and energy sources, and mediating a wide range of cellular activities. The emergence of nanomaterials with distinct optical, magnetic, and electronic properties has witnessed a rapid adoption of these materials for biomedical research and applications. Nanomaterials of various shapes and sizes having large specific surface areas can be used as multivalent scaffolds to present carbohydrate ligands. The resulting glyconanomaterials effectively amplify the glycan-mediated interactions, making it possible to use these materials for sensing, imaging, diagnosis, and therapy. In this review, we summarize the synthetic strategies for the preparation of various glyconanomaterials. Examples are given where these glyconanomaterials have been used in sensing and differentiation of proteins and cells, as well as in imaging glycan-medicated cellular responses.

Upper crustal P-wave velocity structure beneath two volcanic areas in northern Iran

Detailed information about the crustal structure is essential for better understanding the occurrence and mechanisms of earthquakes and volcanoes.Here we present a study of the upper crustal P-wave velocity structure of two seismically and volcanically active areas in northern Iran using the two-dimensional Pg travel time tomography method.The imaging results suggest low velocities in the upper crust beneath the Damavand and Sahand-Sabalan volcanic areas in the central and western parts of northern Iran,respectively.The upper crustal low velocities in these two areas roughly coincide with previously imaged low Pn velocity anomalies,suggesting that the Late Cenozoic volcanic activity was probably caused by the upwelling of hot materials from the mantle.The image feature of the Pg velocity structure beneath the Sahand-Sabalan volcanic area further indicates that the hot materials stored in the upper crust beneath Sahand may be larger in size than those stored beneath Sabalan.Comparison of the Pg velocity images with the earthquake distribution in north Iran suggests that earthquakes mainly occur at moderately low velocity or low to high velocity boundary areas instead of significantly low or high velocity regions.The anisotropy results show that the Pg wave fast direction is consistent with the GPS direction at high Pg velocity areas and the fast direction is inconsistent with the GPS direction but consistent with the strike direction of faults at low velocity areas.Our new upper crustal structural images provide the basic observation for better understanding of the regional seismicity and volcanism,and link the surface geological phenomena to deep crustal and mantle processes associated with the active tectonics in northern Iran.