Image inpainting based on nonlinear anisotropic diffusions

Following the features of curvature and gradient at image edges,an image inpainting method based on nonlinear anisotropic diffusion is proposed.The diffusion can be conducted with different directions and different intensities according to the geometric features of the inpainted images.An adaptive factor is introduced based on the curvature and gradient of the image local geometric information,which can control the diffusion direction and diffusion intensity.At the edges in images,the diffusion coefficients are large for the horizontal directions,while the diffusion coefficients are small for the vertical directions.At the smooth regions,the diffusion coefficients are the same for different directions and they are usually large.Compared with the typical total variation method,the curvature derivation diffusion method,and P-laplace constant variation method,the experimental results show that the proposed method can improve the qualities of the inpainted images     

关于射影Ricci曲率的比较定理与共形不变性

主要研究了芬斯勒度量的射影Ricci曲率.首先,在一个完备的芬斯勒流形上,证明了关于芬斯勒度量的射影Ricci曲率的一个比较定理.其次,刻画了两个共形相关的芬斯勒度量的射影Ricci曲率的关系.在此基础上,证明了两个位似相关的芬斯勒度量的射影Ricci曲率是相等的.     

荒漠草原不同饮水半径和放牧距离对山羊生产性能的影响

测定了典型荒漠草原,天然放牧状态下的阿尔巴斯白绒山羊,在不同饮水半径,不同放牧距离时的饮水量,蒸发量及体重,产绒量,羔羊成活率,全群死亡率,经济效益等生产性能。试验结果表明,饮水半径在２．６ｋｍ,放牧距离在８．２～１４ｋｍ范围内,隔日饮水对山羊的生产性能无不良影响,各种生产指标与每日饮水的对照组相同或接近。但隔日饮水羊只每日平均饮水量比对照组增加１９．８％～２３．８％。在放牧条件下,饮水半径和放牧距离是影响生产力的主要因素之一。为了饮水,增加徒走距离,使羊只体内营养物质损失加大,对山羊生产性能产生持续、积累、缓慢的消耗性影响,并且随着时间的延长,其作用程度不断增加。在饮水半径为７ｋｍ,放牧距离为２４ｋｍ时,山羊群的各种生产性能明显降低。比有饮水点的对照组两个月平均多减重３．５ｋｇ;产绒量下降５．７１％;流产母羊增加４．１７％;羔羊成活率下降８．２％;每只羊肉、绒年经济效益减少１１．８３元。     

自动挡车型冰雪路面制动问题分析方法

描述了某自动挡车型冰雪路面制动问题的分析过程及解决方案.通过采用减小发动机行车怠速和增加制动器有效半径的方式来解决冰雪路面制动问题,最后通过试验验证了该解决方案的有效性,为后续制动系统性能匹配设计提供经验.     

桥梁无粘结预应力钢筋的极限应力分析

根据无粘结部分预应力混凝土梁的受力特点，采用弯矩-曲率法计算无粘结预应力钢筋的极限应力，计算结果与现有的试验数据符合得较好。建立了系统的无粘结部分预应力混凝土简支空心板梁桥设计理论和方法，有助于UPPC梁桥设计理论的完善及发展，并为“公桥规”的修订和完善提供有益的参考。     

400m^3液化石油气球罐盘梯的制作

结合施工实际，介绍了液化石油气罐盘梯的结构，它是由柱盘梯与球盘梯两部分组成的，因此，在计算盘梯的弯曲半径时应分别进行，给出了利用实地放样求盘梯侧板展开下料实长的具体计算步骤，并论述了求盘梯侧板展开下料实长的理论推导过程，通过对此，发现两者数值非常接近，叙述了盘梯的制作方法，指出用该方法制作的盘梯，基本上满足工程的需要，并可实现现场预制整体吊装，减少空中作用，提高了生产效率。     

Repair of radial fractures in toy breed dogs with self-reinforced biodegradable bone plates, metal screws, and light-weight external coaptation

OBJECTIVE: To describe a surgical technique for, and outcome after, treatment of radial fractures with biodegradable self-reinforced polylactide plates and metal screws, and external coaptation. STUDY DESIGN: Prospective clinical study. SAMPLE POPULATION: Eleven Toy breed dogs. METHODS: Radial fractures were repaired by application of a single or 2 stacked biodegradable self-reinforced polylactide plates (poly-L/D, L-lactide, stereocopolymer [LL-and DL-lactide ratio 70/30]; SR-PLA (70/30) implants) secured with metal screws, and light-weight external coaptation. Healing was evaluated clinically and by radiography at 2, 4, 6, 8, 9, 12, 24-26 weeks, and at 1 and 2 years. Owners were interviewed 3 years after surgery. RESULTS: Radial fracture lines disappeared within 4-14 weeks in 10 dogs; an implant failed in 1 dog. Ambulation was excellent for healed fractures. Excessive skin tension led to removal of implants in 1 dog and suture repair in another dog. No foreign body reaction from implant degradation was observed and the plate was usually no longer palpable at 2 years. One dog had a fracture through a screw hole at 1 year. CONCLUSION: Healing and complication rates after repair of radial fractures with SR-PLA (70/30) plates were considered similar or better than reported after repair with metallic plates or external fixation in Toy breed dogs. No radiographic signs of osteopenia were identified under the plate during follow-up. CLINICAL RELEVANCE: Biodegradable polylactide plates could be considered as an alternative to metal plates for radial fracture repair in Toy breed dogs, however available plates are likely not strong enough when used as a single plate. Implant removal is usually not needed.     

流速仪比较与林边溪流量量测

该研究于屏东县来义乡林边溪上游,采用电磁式流速仪、旋杯式流速仪及超声波数位流速仪,进行河川流速量测,并比较三种仪器所实际量测获得数据差别及其实用性,在枯水期进行河川流量量测时水位较低,可利用一点法或两点法量测其流速,并以平均断面法计算出流量,在低水位时,旋杯式流速仪会因为水流速度太小使旋杯无法转动,因此在低水位时,可以电磁式流速仪或超声波数位流速仪进行流量量测。量测结果显示林边溪α值(R/D)约在0.911～1之间,而流量Q<10cm/s时,α值非常趋近于1,当流量Q>10cm/s时,α值大约在0.91～0.96,流量Q>10cm/s时,水面宽度T及水力深度D的改变量较大。     

基于RS与GIS的包头市城市公园绿地休闲游憩服务半径研究

城市公园绿地是城市"社会-经济-自然"复合生态系统的重要组成部分,其休闲游憩服务半径是反映城市公园布局合理性的指标之一。以包头市建成区为典型的研究区,使用缓冲区分析法、引力模型法、费用加权距离法等结合调查问卷,分析了包头市公园绿地服务半径。结果表明:包头市公园绿地服务分布较合理,但布局仍有不足;问卷调查表明,包头市居民选择公园是为了锻炼身体和休闲游憩,距离因素是影响居民游园的主要因素。该研究为未来包头市城市规划提供了一个可供决策参考的依据。