浅析城市文化景观的环境基础及其核心特质——以东北地区为例

该文借用文化生态学的观点,认为城市像自然界的生物一样,其生存环境对它的产生、发展有很大的影响和决定作用.因此针对东北城市文化景观,该文从研究其文化生态环境八手,着重分析了对城市产生、发展影响较大的自然环境、社会环境和经济环境.通过对城市文化景观环境的分析,总结了东北地区城市文化景观的核心特质,并指出城市设计师要合理利用...     

Some results on fuzzy (digital) convexity

The definition of fuzzy convexity is reviewed and some results on projections of convex and fuzzy convex sets are established. Digital fuzzy convexity is defined and relationships among alternative definitions are investigated.     

国产重氮盐感光胶SF性能的分析与研究

国产重氮盐感光胶SF的性质是影响花版质量的一个方面,而网丝的规格、品种、前处理条件等均会影响花版上胶膜强度。本文通过系统测试研究,提出了可靠数据,旨在对工厂实际生产有所帮助。     

急性、分次及慢性γ线照射诱发猕猴生物效应的比较研究

本文就高剂量率急性一次(223mGy/min)、分次累积(223mGy/min,每周照射一次,0.25Gy/次)及低剂量率慢性连续(每周照射5天,50mGy/d)γ射线照射时,在0—2Gy 累积剂量范围内,对猕猴造血、免疫及细胞遗传学方面某些生物效应进行了比较研究。不同方式照射时机体损伤程度和特性不一,急性照射组各类效应均比其它受照组明显;而分次和慢性照射组的剂量-效应规律则比较相似。在低剂量率慢性照射情况下,PHA 激活淋巴细胞微核、淋巴细胞染色体无着丝点断片及总断裂数在累积剂量为0.25Gy 时就出现了明显增高(p<0.05),且与受照剂量呈线性正相关。它们的剂量-效应曲线尾部(在1—2Gy 区)均呈现有“坪”的现象。停照后一年中动态观察的结果表明,各照射组动物受照时所诱发的效应,绝大多数是可恢复的。急性组恢复至正常所需时间较其它组长,其中免疫和造血机能的恢复呈显著波动性,而细胞遗传学效应随停照后时间的延长逐步恢复。     

辽宁五女山山城高句丽遗址博物馆工程记录

文章以辽宁五女山山城高句丽遗址博物馆工程的项目背景设计和施工过程的简略但完整的介绍为解剖实例,对于国内目前小型遗址博物馆这一特殊博物馆类型的设计现状和各种制约条件进行了简要分析,希望引起关于影响建筑作品完成度的外部因素的探讨。     

Mesoscopic particulate system assembled from three-dimensional irregular particles

Particles around us are generally in the form of irregular characteristics in shape and size. Establishing rational mesoscale models that are suitable for different types of particles is of great significance to comprehensively evaluate the mechanical properties of particulate systems assembled from irregular particles. The preponderances of previous works are mainly focused on particle simulations using regular-shaped geometries or simple polyhedrons, and little is known about quantitative characterization for the particles with complex shape characteristics. In this paper, a series of novel and efficient algorithms are presented to generate three-dimensional particulate systems assembled from particles with irregular characteristics in shape and size. According to the developed particle generation algorithm and vector-growth algorithm, the convex- and concave particles with different shape- and size configurations are obtained. Parametric analysis of corresponding algorithm parameters on the shape- and size configurations of particles are quantitatively investigated in terms of different indexes, such as sphericity, angularity and size, which provides an important guidance for the shape- and size control of irregular particles. Based on the generated irregular particles, a series of algorithms are proposed to generate the particulate systems with random spatial characteristics as well. Employing the developed compaction algorithm, mesoscopic particulate systems with different particle gradations and compactness are generated precisely. To sum up, the present particle model provides insights into capturing and studying the meso-structure characteristics and macroscopic mechanical properties of particulate systems.     

论合同的解除

合同解除的法律意义在于合同有效成立之后,因当事人一方或双方的意思表示,使特定的合同法律关系即特定的合同当事人之间的权利义务关系归于消灭的法律行为。合同解除在经济生活中经常发生,法律制度尚需完善,实践中容易将合同解除与合同终止、合同撤销相互混用、混为一谈,不易区分。合同解除是以有效成立的合同为前提,合同解除具有一定的条件、程序和法律责任。     

怎样做好信访接待工作

做好信访接待工作,必须做到“四要”:要耐心倾听,善于沟通;要优化环境,文明接待;要加强学习,掌握政策;要注重实效,解决问题,只有这样才能提高接访质量,切实解决信访问题.     

订立施工合同应注意示范文本的新修订

我国借鉴了FIDIC土木施工合同条件有关规定 ,于 1999年 12月 2 4日重新修订了《建设施工合同 (示范文本 )》。新文本的内容和一些规定有所变动。建设施工的相关主体在订立施工合同时要充分注意示范文本的变动。     

化学振荡的应用

本文系统地阐述了化学振荡的应用及对化学振荡条件的争议,并指出了进一步研究的方向。对用于成分分析的方法提出了改进意见。