融合盘扣工艺的文创饰品设计创新研究与实践

盘扣是中国特色传统服饰的点睛之笔,但盘扣及其文创饰品的市场现状却不容乐观。分析近年来盘扣文创饰品的研究现状并进行市场调研,根据分析结果从载体功能拓展、艺术语言重塑、色彩传承创新和材质多样创新这4个方面深入研究,提出融合盘扣工艺的文创饰品设计方法,并应用于设计实践,设计出一系列功能性与审美性兼具的盘扣饰品,进一步完善盘扣创新设计和应用体系的系统性和完整性,以推动盘扣工艺的传承发展。

潍坊海盐文化和旅游的融合发展

基于丰富的海盐文化遗址、遗存及其他海盐资源,潍坊海盐文化和旅游的融合局面已经初步呈现,这既反映在理念和职能层面,也在实践中有明显表达。但二者在融合中,存在低层次规划和现代旅游需求之间的矛盾、海盐文化旅游产品急需创新、海盐文化旅游人才缺乏等问题。为此,需要在坚持政府主导、保护优先且保护利用相结合、可持续发展等原则的指引下,深入挖掘和整理海盐文化资源,克服资源较为分散、地面以上可视性资源较少的劣势,把握好文化和旅游的“最大公约数”,创新开发海盐文化旅游产品和旅游纪念品,倾力打造海盐盐区的“会”“节”和会节旅游,开发盐文化特色饮食等,促进潍坊海盐文化和旅游的深度融合。

莱州湾南岸盐业的阶段性发展及其特征

莱州湾南岸海盐业在中国数千年的盐业开发过程中,形成了自己独有的特色,并呈现出阶段性发展的特征。自海盐业起源至东汉时期,是莱州湾南岸作为全国性海盐生产中心存在的阶段;自魏晋南北朝至宋元时期,莱州湾南岸海盐业地位有所下降,沦为区域性海盐生产中心;自明清至当代,随着晒盐法的出现,为莱州湾南岸海盐生产注入了强大的活力。但由于明清时期销盐区制度的限制,这一优势并未体现出来,直至新中国建立后,莱州湾南岸重新成为全国性海盐生产中心。

PET image reconstruction with rotationally symmetric polygonal pixel grid based highly compressible system matrix

To achieve a maximum compression of system matrix in positron emission tomography (PET) image reconstruction, we proposed a polygonal image pixel division strategy in accordance with rotationally symmetric PET geometry. Geometrical definition and indexing rule for polygonal pixels were established. Image conversion from polygonal pixel structure to conventional rectangular pixel structure was implemented using a conversion matrix. A set of test images were analytically defined in polygonal pixel structure, converted to conventional rectangular pixel based images, and correctly displayed which verified the correctness of the image definition, conversion description and conversion of polygonal pixel structure. A compressed system matrix for PET image recon was generated by tap model and tested by forward-projecting three different distributions of radioactive sources to the sinogram domain and comparing them with theoretical predictions. On a practical small animal PET scanner, a compress ratio of 12.6:1 of the system matrix size was achieved with the polygonal pixel structure, comparing with the conventional rectangular pixel based tap-mode one. OS-EM iterative image reconstruction algorithms with the polygonal and conventional Cartesian pixel grid were developed. A hot rod phantom was detected and reconstructed based on these two grids with reasonable time cost. Image resolution of reconstructed images was both 1.35 mm. We conclude that it is feasible to reconstruct and display images in a polygonal image pixel structure based on a compressed system matrix in PET image reconstruction.

沟道堆积体失稳破坏引发泥石流的起动机理研究进展

地震引发的崩塌、滑坡等次生灾害在沟道中形成的松散堆积体,在强降雨作用下发生失稳破坏,引发规模庞大的泥石流。对该类泥石流进行系统地研究并揭示其起动机理和破坏规律,能够为我国西南地区泥石流防治工程提供一定的理论参考。因此,基于现阶段的国内外研究现状,重点分析了沟道堆积体稳定性影响因素,梳理了4种失稳破坏模式,凝练出了2种沟道堆积体的起动机理,并以水力类泥石流的观点归纳总结了三类沟道堆积体失稳破坏引发泥石流的临界起动模型。最后,由于沟道堆积体失稳破坏引发的泥石流起动过程本身的复杂性,基于对现有成果的不足分析,提出了该类泥石流涉及的3个重难点科学问题。