基于SVD和SAE的医学图像多功能零水印算法

针对医学图像的版权保护和篡改定位问题,提出了一种多功能零水印算法。获取构造零顽健水印和半脆弱水印的信息矩阵,并分别与原始顽健和半脆弱水印进行异或运算,构造零顽健和零半脆弱水印图像。实验结果证明,提取的水印效果较好,算法能很好地抵抗常见攻击,特别是抵抗强度较大的攻击的效果较好。     

网络媒体技术在医学影像教学领域的运用分析

现阶段,网络、计算机以及信息技术快速发展,为医学影像学提供了技术支持,使得医学影像教学进入了全新 的阶段。医学影像教学过程具有一定的特殊性,我们可以根据具体的特点,在其实践教学中巧妙地应用网络媒体技术,大大提 升教学质量和水平。本文首先介绍了医学影像教学以及网络媒体技术,进而详细分析了教学过程中合理地应用网路媒体技术 的积极作用,它可以极大地提升教学水准,推动教学的进一步改革。     

谈红透山铜锌矿窄脉贫化管理初见成效

红透山铜锌矿经过多年的开采,目前矿山面临着边、远、窄等恶劣的开采作业环境.窄脉采矿场贫化指标一直居高不下,一度高于30％,甚至达到40％.给选矿厂的选别工序带来很多困难,同时也影响了有用金属的回收率.本文论述了针对红透山铜锌矿窄脉开采中贫化指标的超标,在确保采矿效率、作业安全的同时,采取有效措施,降低贫化率指标,并取得一定效果.     

石煤提钒工艺中的新型焙烧装置

简单介绍了几种适合焙烧石煤的装置,详细介绍了一种利用流态化沸腾焙烧技术的新型石煤焙烧装置,与传统的流态化焙烧炉相比,具有结构简单的优点。     

从某低品位石煤钒矿中浸出钒的工艺研究

研究了从某低品位石煤钒矿中浸出钒,主要考察了硫酸直接浸出、氧化焙烧—酸浸、氧化焙烧—碱浸和钙化焙烧—碳酸钠浸出等工艺对钒浸出率的影响。结果表明:造球氧化焙烧—酸浸流程工艺指标较好;在焙烧温度850℃、焙烧时间2h、酸用量为矿石质量60%条件下浸出6h,五氧化二钒浸出率达62.5%。     

基于人眼光学模型的角膜模型的研究

位于眼球最前端的角膜是人眼光学系统的主要屈光元件之一,建立角膜模型具有重要的研究和临床意义。基于角膜面型的非球面特性,应用光学设计软件Zemax,从光学成像角度,提出了结合人眼光学模型的角膜双二次曲面模型的建立,并结合国人正视眼和近视眼的有关实测数据和分析结果,以人眼的波像差为评价函数,通过对初始模型眼的优化,给出了符合我国人眼特点的正视眼和近视眼模型中的角膜模型,讨论了矫正近视的矫正眼模型中的角膜理想模型和可用于角膜屈光手术中的切削模型。基于人眼光学模型的角膜双二次曲面模型也可为波像差引导的个性化角膜切削方案提供一个更适于实际应用的数字化模型。     

Die neue Landecker Eisenbahnbrücke über den Inn

Eisenbahntragwerke aus Stahl, wie die alte Landecker Fachwerkbrücke über den Inn, hatten Tradition und sind nur mehr selten anzutreffen. Die vor 105 Jahren errichtete Landecker Innbrücke der Arlbergstrecke war für einen modernen Eisenbahnbetrieb mit den höheren Lasten und Geschwindigkeiten nicht mehr geeignet und aus der Sicht der Erhaltung zu erneuern. Der Brückenneubau und die Revitalisierung des alten Steinviaduktes stellten für die Österreichischen Bundesbahnen (ÖBB) als Bauherr eine besondere Herausforderung dar, da die Brücke mit dem Viadukt an zentraler Stelle in der Stadt steht und damit ein regionales Wahrzeichen ist. Durch die intensive und gute Zusammenarbeit der Bürger mit der Projektleitung der Bahn, den Planern mit den ausführenden Firmen sowie den Architekten mit den Fachleuten der ÖBB Brückenbau ist dennoch ein neues Wahrzeichen für die Stadt Landeck entstanden. The new Landecker railway bridge across the Inn. Railway structures of steel had been tradition like the old Landecker Innbrücke – a lattic bridge across the Austrian river Inn. Nowadays these bridges are still rarely to found. The Landecker Bridge of the Arlberg Passage has been erected 105 years ago. Today the bridge is no longer suitable for modern railway traffic with higher loads and higher speeds and has to be rehabilitated. The new building of the bridge and the restoration of the old stone viaduct is an exceptional challenge for the ÖBB (Österreichische Bundesbahnen) group how is the building owner. Because the bridge with its viaduct is centrally located in the city of Landeck and thus it represents a regional landmark. As a result of the intensive and good cooperation between the inhabitants and the project management of the railway corporation, between the planners and the building contractors as well as the cooperation between architects and experts of the ÖBB Brückenbau, a new landmark of the city of Landeck is still created.     

Lean manufacturing as a high-performance work system: the case of Cochlear

This paper addresses the Special Issue call for Australian examples of innovative management systems that enable the production of successful products by drawing on a single case study: medical device manufacturer Cochlear. Through qualitative case study methodology, we examine the human resource management practices that complemented the implementation of lean manufacturing principles. We argue that in their implementation, Cochlear’s management team enriched the traditional understanding of lean and its focus on waste reduction, low cost and quality assurance by adopting people management practices as an integrated component of the overall management capability which allowed their people to grow and develop. The combination of lean and HR practices transformed Cochlear to a high-performance work system and positively impacted production processes and output. By examining a medical device manufacturer, an under-researched sector, our paper expands existing literature on lean manufacturing and provides implications for practitioners.     

徽州抱鼓石中儒家礼制文化的表现形式

徽州抱鼓石作为摆放在徽州地区传统宅门前的建筑装饰构件,不仅是主人社会地位的外在标志,而且是儒家礼制文化的直观反映。徽州抱鼓石在造型上体现了天圆地方的礼制规矩,在排列顺序上表达了成双成对的文化寓意,在装饰程度上表现出简约淡雅的装饰特征,这些都是儒家礼制文化在徽州抱鼓石中的表现形式。     

Beam Hole Configuration and Analysis of Medical Reactor for Boron Neutron Capture Therapy

This report presents an investigation of beam holes to be provided in a medical reactor for Boron Neutron Capture Therapy. The principal requirement for the beam holes is to deliver the therapeutic doses of thermal and epithermal neutrons in a modest time (30 to 60min) with minimal fast neutron and γ-contaminants. Characteristics of the beam holes have been evaluated by 2-dim. n-γ coupling S _N transport calculations. Reexaminations and revisions of the beam hole design have brought improvements of the characteristics, especially an increase of the thermal neutron flux at the horizontal thermal neutron beam port and a decrease of the fast neutron flux at the vertical epithermal neutron beam port. The design objectives for the beam holes set up in this study may be achievable even if the thermal power of the reactor is reduced from 2 to 1MW.