Retargeting of Heterogeneous Document to Improve Reading Experience

人们越来越多的依赖于移动终端设备阅读各种数字内容。这些设备在屏幕分辨率、长宽比等参数上的差异对数字内容的处理提出了新的挑战,图像适配成了近年的研; 究热点。各种内容敏感的方法被提出以解决如何在图像缩放时减少重要物体的严重扭曲。然而,对于以图像形式存在的、包含不同元素的异构文档,由于其分辨率一; 般比较高,在小尺寸的移动设备上只能部分显示以保证可读性,用户不得不频繁地进行缩放、平移以阅读整个文档,极大的影响了阅读效率。为此提出了一种针对异; 构文档的适配方法,通过对文档布局的局部分析,自动抽取得到用户拟阅读的矩形区域,并适配到屏幕上,避免了繁琐的缩放、平移操作,极大地提高了阅读的效率; 。People rely more and more on mobile devices to read various digital; contents. The variation on parameters such as screen resolution, aspect; ratio of these devices presents new challenges on digital content; processing. Image retargeting has become popular in the past decade.; Various content-aware methods are presented to reduce the distortion of; important object when the image is scaled. However, for those bitmap; represented heterogeneous documents which contains various elements, due; to the high resolution, it can only be partially displayed on devices; with small screen region. Frequently switch between scale and translate; are required to read the whole document, which obviously affect user's; reading experience. We propose a retargeting method for heterogeneous; document. We firstly analysis the layout of document in a local manner,; and then extract the appropriate rectangular reading area and resize it; to match the screen. Our method avoids the tedious scale and translation; operations, and thus improves the reading experience greatly.国家自然科学基金项目; 国家科技支撑计划项目; 福建省经济和信息化委员会2013年技术创新专项资

对流扩散方程三角形有限元解的一致估计

利用三角形线性元的积分恒等式,给出了二维非定常对流扩散方程的半离散有限元解和真解的一致最优误差估计,即误差与ε无关,而仅与右端f和初值u_0有关

Effect of the Construction of Green Belts on the Attenuation of Traffic Noise along the Urban Trunk Roads in Xiamen City

通过对厦门市主干道绿化带种类结构调查以及噪声测定等,分析了厦门市主干道绿化带结构及其减噪效果。结果表明,厦门市主干道绿化带可分为4种结构:单一乔木型、乔木+疏灌木/绿篱型、乔木+密灌木型以及乔木+小乔木+灌木/绿篱型,带宽多在4~10M。厦门市主干道绿化带总体减噪能力为0.93~12.96db,绿化带对交通噪声超标治理率达70%。绿化带减噪能力y(db)与带宽X(M)呈显著的线性关系:y=1.2251X+0.2416(r2=0.8603);绿化带的附加衰减与总衰减亦呈显著正相关:y=0.4535X+0.2698(r2=0.9242),噪声的附加衰减主要受绿化带结构的影响,上述四种结构对噪声附加衰减平均值分别达0.93、2.25、4.43和6.72db。绿化带的宽度和结构均是影响其减噪效果的关键因素。Through site investigation and noise monitoring, the effects of the construction of green belts along the urban trunk roads in Xiamen Island on the attenuation of noise has been studied.The results show that the construction of green belts along the trunk road can be divided into four kinds of types as bellows: type I, single arbor; type II, arbor + shrub; type III, arbor + sub-arbor and type Ⅳ, arbor + sub-arbor + shrub.Their width varied among 4--10 m.The noise-reducing ability (y, dB) of the green belts varied from 0.93 to 12.96 dB with various belt widths (x, m), and can be expressed as following: y=1.2251x+0.2416.Meanwhile the additive attenuation of traffic noise (y, dB) presents a closely linear relationship with the total noise-reducing ability (x, dB) as following: y=0.4535x+0.2698 (R2=0.9242).Meanwhile, the additive attenuation of traffic noise is main affected by the constructions of green belts, which reached 0.93, 2.25, 4.43 and 6.72 dB, respectively for the above four kinds of construction types.It shows that the width and construction of green belts play the same important role to reduce the traffic noise

Separation and identification of auraptene from grapefruit peel oil

橙油素是广泛存在于柑橘类果实中的天然抗癌活性成分。选用SP70大孔吸附树脂分离纯化葡萄柚精油中的橙油素,该树脂对于橙油素的吸附容量和解吸率分别达到14.53 Mg/g和83.32%,并成功地从树脂床层的洗脱液中结晶分离出橙油素晶体。对所得晶体分别采用差示扫描量热仪(dSC)、紫外吸收光谱(uV)、红外吸收光谱(Ir)、电喷雾质谱(ESI-MS)进行定性分析,分析结果与橙油素标准品相符合。进一步采用高效液相色谱(HPlC)对所得晶体进行定量分析,结果表明所得晶体中橙油素的质量分数可达85%。Auraptene exists widely in the peels and juice sacs of citrus species and is reported to be an effective inhibitor of chemical carcinogenesis in some rodent models.The separation and purification of auraptene from the grapefruit peel oil was performed by SP70 macroporous resin adsorption.The amount adsorbed and the recovery of auraptene were 14.53 mg/g and 83.32% respectively.Auraptene was crystallized out from the concentrated eluate of macroporous resin bed successfully.Differential scanning calorimetric(DSC),ultraviolet spectrum(UV),infrared spectroscopy(IR) and electrospray ionization mass spectroscopy(ESI-MS) were all used to analyze the obtained crystals qualitatively.The analytical results are in accordance with that of auraptene standard.Furthermore,high performance liquid chromatography(HPLC) was utilized to quantify auraptene of the crystals obtained.The mass fraction of auraptene in the obtained crystals can reach 85%.福建省新世纪人才支持项目(0000-X04157

荆门罗坡岗战国墓出土料珠的初步考察

20世纪50年代后，我国许多古代遗址和墓葬都出土过一些料器，始见于黄河流域，之后长江流域也有人量出十，年代最早为两周。为探讨我国古代玻璃技术的起源，包括本文作者后德俊在内的许多人都曾对料器进行过一些科学考察，获得了不少宝贵的资料；但从总的情况看，这项研究目前还是很不够的，许多问题还没有完全解决。最近我们又对湖北荆门罗坡岗战国墓出十的一件料珠残片进行了科学分析，现将有关情况介绍如后

Direct calculation of critical depth of horseshoe section tunnel

马蹄形过水断面是无压隧洞较常采用的断面形式之一,水力计算中临界水深的求解无显函数公式,传统的试算法或查图法不仅计算过程繁琐复杂,而且计算精度不高。该文通过对马蹄形断面临界流方程的数学变换,并对本文引入的无量纲参数与相对临界水深的关系分析及数值计算,应用逐步优化拟合原理,得到标准Ⅰ、Ⅱ型马蹄形断面临界水深的直接计算式。实例计算及误差分析表明:在工程实用范围内该公式最大相对误差仅为0.8%,且该式物理概念清晰明确、公式形式简捷,为工程设计及水工设计手册的编制提供有益的参考

氧化铝导模共振效应滤波器的分析研究

根据等效介质理论和严格耦合波理论,提出了可见光波段下基于氧化铝材料的亚波长导模共振光栅滤波器的理论设计与仿真方法。利用Rsoft软件分别仿真分析强调制和弱调制下的氧化铝光栅反射光谱,并探讨了光栅周期（400～420nm）、占空比（0.2～0.8）和光栅厚度（117～367nm）等结构参数的改变对光栅光谱特性的影响。仿真结果表明,氧化铝光栅在610nm波长处具有优秀的滤波效果:旁带<3%,半高宽（FWHM）<0.3nm,高反射率（接近100%）。最后采用快速原子束刻蚀技术制备出了可见光波段下的氧化铝材料导模共振滤波器

高熵合金的低温塑性变形机制及强韧化研究进展

高熵合金是由多种主要元素组成的新型金属材料，固有的多主元和构型熵高等特点，使其具备诸多优异的力学及物理化学性能，从而引起了研究人员的广泛关注。在低温工程应用方面，高熵合金优异的强塑性、良好的韧性和抗冲击能力、较高的相稳定性等特点使其在深空探测、低温超导、气体工业等领域极具应用前景。本文综述了高熵合金的低温研究进展，详细总结了高熵合金在低温环境的变形机制及强韧化机理，并结合传统低温工程材料的性能对比，展望了高熵合金未来低温工程应用的主要方向

三江南段-中南半岛特提斯蛇绿岩大地构造与成矿

The research about Tethys along the eastern boundary of the Qinghai-Tebit plateau arouses great interests of geologists from all over the world. However, geological jobs keep relatively inadequate and decentralized in the Sanjiang-Indo-China multinational area. Therefore, under the Tethyan tectonic background, it is significant to determine rules of tectonic geography and mineralization of the Tethyan ophiolite complex belt, and to discover the direct evidence of ocean plates based on the former research including its stratigraphy, petrology, structural geology and paleontology. Our study covers the following aspects: (1) The suture location and the subduction direction of different periods are concluded by connecting the tectonic magma belts with the orogenic belt. A geometric pattern of a more fragmentary ophiolite geography of the paleo-Tethys contrasting to that of meso-neo-Tethys can be found easily from the paleogeography. (2) The initial location of sutures greatly changed by events of Indo-Chinese epoch, Yanshanian epoch, and Himalayan epoch can be concluded from our research of the typical ophiolite outcrop area. (3) The formation and distribution of some important mineral resources are obviously controlled by the ophiolite complex belt. The ultra basic rock belts provide the ore material resources of magmatic cobalt and nickel metallogenic belt. The large area of acid magma formed during the course of the close and collision of plates, parallel to the ophiolite belt, is the important material resource of the hydrothermal wolfram and tin deposit belts. The formation of the regional hydrothermal deposits was improved by the transition of tectonic system around the Miocene