基于ARCGIS的太平湖可视化研究

数字高程模型（DEM）是地理信息系统的一种基础数据。本文在ArcGIS环境下,将测绘部门的AutoCAD数据通过格式转换提取等高线数据,生成DEM、坡度图、坡向图等,并将遥感图像叠置上进行显示。最后通过VC#．net和ArcEngine配置了太平湖显示系统。     

用航空航天影像更新地形图地物要素的栅格化方法

文章针对当前我国1:5和1:1万地形图更新的大规模生产的迫切需求,提出在原有地形图栅格式数字化的基础上,叠加经过精密纠正配准的航空或卫星遥感影像,以栅格方式更新地物要素的全过程方法。文中特别阐述了：1）地形图栅格数字化不同于矢量数字化的扫描采样分辨率问题;2）区别于传统的"针孔式"控制点概念的图像图形阵列控制点技术;3）由于DEM（数字高程模型）数据缺乏或精度不足引起的航空航天影像与地形图图形配准误差的局部纠正方法;4）定性指导定量的影像判读方法;5）从遥感影像提取地物结构信息的半自动化方法。文章最后列出     

新型X型射线影像增强系统分辨率数学模型

课题组设计了新型的X射线影像增强系统。由于它是由多个光电器件级联而成的链状成像系统,在组成器件之间存在着一定的分辨率函数关系,并且这种函数关系会随着成像视野的变化而变化．鉴于此种关系,建立了系统的分辨率数学模型,对多种器件组合效果进行理论分析。结果表明分辨率理论计算值和实验测量值比较吻合,所以分辨率数学模型节省了系统的设计时间和费用,对提高系统分辨率起着理论指导作用。     

图像信息量的变化对自动对焦评价函数的影响

阐述了基于小波变换、拉普拉斯算子以及SPSMD（差分平方和函数）的三种自动对焦评价函数，采用数字仿真技术对不同特性的几组序列图进行了实验，分析了在图像信息量变化的情况下三种评价函数的特性。通过函数曲线图形能够清楚地发现，基于小波变换的自动对焦评价函数在图像信息量很少的情况下仍有很好的判断能力，有着最好的适应性和稳定性。     

测量检验中的误收、误废和损失函数分析

在对产品进行测量检验时,误差总是不可避免的,因此经常会发生误收和误废。误收会对产品的质量产生不良影响;误废则造成经济损失。合理控制误收和误废,对于产品质量的可靠性和制造的经济性是很重要的。通过对损失函数泰勒展开式的分析,可知由测量误差所造成的质量或成本损失Ｌ（ｘ）是方差α＾２的函数。本文针对田口玄一先生在公式Ｌ（ｘ）= ｋα＾２中求解ｋ值方法,提出了探讨意见,并采用损失函数的计算及成本的核算对不同的测量方法进行了优劣比较。     

测量检验中的误收、误废和损失函数分析

 在对产品进行测量检验时,误差总是不可避免的,因此经常会发生误收和误废。误收会对产品的质量产生不良影响;误废则造成经济损失。合理控制误收和误废,对于产品质量的可靠性和制造的经济性是很重要的。通过对损失函数泰勒展开式的分析,可知由测量误差所造成的质量或成本损失Ｌ（ｘ）是方差α＾２的函数。本文针对田口玄一先生在公式Ｌ（ｘ）= ｋα＾２中求解ｋ值方法,提出了探讨意见,并采用损失函数的计算及成本的核算对不同的测量方法进行了优劣比较。     

基于边缘感知的图像复原神经网络损失函数

像素级损失是图像复原任务中最基本、最常用的损失函数。然而,像素级损失无法区分图像中的边缘部分是否模糊,对所有像素点的处理一致,这与人类视觉系统对边缘部分的感知不同。通过对图像边缘部分的分析,本研究发现当输出图像模糊时,其与真实图像对应像素的误差方向与真实图像中该像素的二阶梯度方向相同。基于此本文提出了一种基于边缘感知的结构保留损失函数(SPLoss)。本研究设计了模糊因子图来检测模糊像素,然后通过增加模糊位置像素误差的权重来惩罚模糊像素。SPLoss可以检测到输出图像中的模糊像素,并在优化网络时对其进行惩罚。对于包括图像超分辨率和图像去模糊在内的图像复原任务,本文在多个网络结构上进行了实验。实验结果表明,使用本文提出的损失函数训练的网络可以恢复拥有更好的感知质量的图像,在感知相关客观指标和视觉效果方面均超越原有像素级损失。     

基于遥感专家分类系统的土壤信息提取与识别

论文在遥感信息提取与识别理论与方法的支持下，以黑龙江省富裕县为试验区，采用MODIS遥感数据和地形数据，利用地表反射率、植被指数以及DEM数据等参数提取特征图像．结合样区土壤分类体系和土壤遥感光谱特征，探讨基于专家分类系统的土壤信息提取的可行性，评价其识别的精度。     

利用过采样技术提高ADC测量微弱信号时的分辨率

为了提高现有模数转换器（analog-to-digital converter,ADC）检测微弱信号的能力,简化系统电路和降低生产成本,在充分利用ADC采样速度的条件下,通过过采样技术来提高ADC的分辨率,并且采用叠加成形函数的方法,实现了对微弱信号的检测．理论分析了不同情况下成形函数带来的误差、成形函数的使用条件和减少其带来的误差的方法实验结果表明,用常规中分辨率ADC直接采样,就可以达到与现有高分辨率ADC直接采样才有的高精度;而使用叠加成形函数后的过采样技术,其效果更佳.     

基于Bisquare算法的数字心电图机数据采集方法

医学心电图机数据的样本数量较多，数据在采集过程容易受到噪声干扰，发生偏移，导致采集误差，造成数据难以拟合的现象。为了解决上述问题，基于Bisquare算法提出一种新的数字心电图机数据采集方法。通过空间函数和范围函数计算边缘信息量，确定去噪标准值，检测边缘值，实现边缘去噪。分析不同样本与Bisquare拟合函数的差距，二次分配权重，改进权值。根据线性拟合结果，建立最佳拟合模型，计算样本损失函数，通过得到的浮点计算量提取心电图机数据特征，确定灰度级的平均像素值，实现数据采集。实验结果表明，基于Bisquare算法的数字心电图机数据采集方法与实际结果高度吻合，能够真实地检测出心电图各波段的数据量，为后续医疗工作提供有利基础。     

Integrating X-ray fluorescence and infrared imaging microspectroscopies for comprehensive characterization of an acetaminophen model pharmaceutical

The integration of full spectral images using the complementary microspectroscopic imaging techniques X-ray fluorescence and Fourier transform infrared is demonstrated. This effort surpasses previous work in that a single chemometric software package is used to elicit chemical information from the integrated spectroscopic images. Integrating these two complementary spectroscopic methods provides both elemental and molecular spatial distribution within a specimen. The critical aspect in this work is using full spectral maps from each pixel within the image and subsequent processing with chemometric tools to provide integrated chemical information. This integration enables a powerful approach to more comprehensive materials characterization. Issues addressed include sample registration and beam penetration depth and how each affects post-processing. An inorganic salt and an acetaminophen pharmaceutical model mixture demonstrate the power of integrating these techniques with chemometric software.     

Analytical modeling of the apparent d33 piezoelectric coefficient determined by the direct quasistatic method for different boundary conditions.

The longitudinal piezoelectric coefficient d33 measured by the quasistatic (Berlincourt-type) method is strongly dependent on the sample aspect ratio (thickness/lateral dimension) and the type of contacts used to collect the charge and apply the pressure on the sample. In this study, we present an analytical model in which apparent (measured) d33 is a function of the aspect ratio, the mechanical properties of contacts, and the properties of piezoelectric material. Using derived relations, it is possible to obtain the true value of d33 in the wide range of boundary conditions. The analytical results are compared with simulations using finite element modeling (FEM) and with experimental data; and good correlation is found among them. Effect of the geometry of the contacts on apparent d33 value is specifically addressed.     

An Analytical Determination of the Flexure of the 3·5 m Primary and 1 m Test Mirror of the ESO's New Technology Telescope for Passive Support and Active Control

Abstract

The active optics control concept of the ESOs 3·5 m New Technology Telescope (NTT) is based on the correction of aberrations by pre-calibrated changes of the axial forces that provide passive astatic support of the primary. The corrected aberrations are the basic orders of spherical aberration, ordinary astigmatism, triangular and quadratic astigmatism, and furthermore, coma up to the fifth order. This paper is concerned with the analytical determination of the force changes necessary, in either certain groups or the entirety of the supports, to produce any one of these aberration modes. The calibration is derived for two meniscus-shaped mirrors, the NTT primary of aspect ratio 1 : 15 and a thin test mirror of 1 m diameter and aspect ratio 1 : 56, designed to prove the control principle. The theoretical approaches used are adapted to the different stress distributions resulting from the different mirror shapes. Realized as flexural Fourier modes, the generated aberrations are orthogonal to each other and therefore exclude operative interference. The deviations from the desired radial laws amount to very few percent at most. Preparatory to this analysis, the paper treats both the passive axial supports and the radial edge support of the primary. A novel solution for the latter restricts the unavoidable flexural coma to low orders that are readily correctable by active control. Wherever possible, the analytical results are compared with related finite-element results obtained by other authors.     

Analytical modeling of the apparent d/sub 33/ piezoelectric coefficient determined by the direct quasistatic method for different boundary conditions

The longitudinal piezoelectric coefficient d/sub 33/ measured by the quasistatic (Berlincourt-type) method is strongly dependent on the sample aspect ratio (thickness/lateral dimension) and the type of contacts used to collect the charge and apply the pressure on the sample. In this study, we present an analytical model in which apparent (measured) d/sub 33/ is a function of the aspect ratio, the mechanical properties of contacts, and the properties of piezoelectric material. Using derived relations, it is possible to obtain the true value of d/sub 33/ in the wide range of boundary conditions. The analytical results are compared with simulations using finite element modeling (FEM) and with experimental data; and good correlation is found among them. Effect of the geometry of the contacts on apparent d/sub 33/ value is specifically addressed.     

多向倒塌技术爆破拆除复杂结构楼房

爆破拆除宽为13 m、东西长111 m、高为12 m的复杂砖混结构楼房,在楼房高宽比值不大,整体性较差的情况下,对需要保护周围树木、建筑物等的复杂环境,选择多向倒塌联合爆破拆除方案.合理选择爆破时差、顺序和爆破参数,保证了各部分按设计各自定向或内向倒塌;并采取有效措施,减少爆破个别飞散物、降低爆破震动和爆破粉尘等爆破危害.     

中间相沥青可溶组分的结构表征

用１Ｈ／１３Ｃｎ．ｍ．ｒ．联合解析的方法分析表征了澄清油中间相沥青和乙烯渣油中间相沥青甲苯可溶组分（ＴＳ）和甲苯不溶吡啶可溶组分（ＴＩ－ＰＳ）的平均结构特征,并给出了满足平均结构参数的平均结构模型。为研究中间相沥青的形成机理以及调制合适的纺制高性能炭纤维的原料－中间相沥青提供了结构信息     

热处理温度对M-Ba铁氧体微米纤维结构和磁性能的影响

以柠檬酸和金属盐为原料,采用有机凝胶先驱体转化法成功制备了直径为500～600nm的钡铁氧体(BaFe12O19)微米纤维。通过XRD、SEM和VSM等技术对所制备的目标纤维进行了表征。结果表明,经750℃焙烧2h后,可获得M-Ba铁氧体纯相。随着焙烧温度的升高,晶粒逐渐长大,经850℃焙烧2h后,纤维主要由比较规则的片状晶粒组成。钡铁氧体纤维的磁性能主要受晶粒尺寸和测试温度的影响。经950℃焙烧2h后,组成纤维的晶粒尺寸约为62nm,室温下测得的饱和磁化强度和矫顽力均取得最大值,分别约为67A.m2/kg和328kA/m。在液氮(77K)条件下,纤维的饱和磁化强度有显著提高,最大值约为87A.m2/kg,这主要是由于纳米晶的表面自旋有序程度提高造成的。     

The effect of aspect ratio on toughness in composites

Much information now exists on factors affecting toughness in composites. Theoretical expressions for fracture energy also abound, in response to the many factors that have been identified as contributing to toughness in fibre reinforced materials. This material is reviewed from the point of view of the effect of aspect ratio on toughness. Expressions relating fracture energy to aspect ratio are derived and compared with experimental data. It is shown that in many cases aspect ratio should be as large as possible. There are a few cases, however, where the aspect ratio should be as close to the critical value as possible.     

Dynamical approach to complementarity of interferometers

The complementarity for wave-like and particle-like properties of a quantum mechanical particle in the Mach–Zehnder interferometer is investigated by means of the dynamical approach. Measurement devices are placed on the paths of the interferometer to obtain the information of a propagating particle. The which-path information of the particle and the fringe visibility of the interferometer are derived by considering the dynamics of the particle and devices. When each device consists of a single qubit, the maximum amount of the which-path information is obtained and the complementary relation is examined.     

A Framework for Systematic Classification of Assets for Security Testing

Over the last decade, a significant increase has been observed in the use of web-based Information systems that process sensitive information, e.g., personal, financial, medical. With this increased use, the security of such systems became a crucial aspect to ensure safety, integrity and authenticity of the data. To achieve the objectives of data safety, security testing is performed. However, with growth and diversity of information systems, it is challenging to apply security testing for each and every system. Therefore, it is important to classify the assets based on their required level of security using an appropriate technique. In this paper, we propose an asset security classification technique to classify the System Under Test (SUT) based on various factors such as system exposure, data criticality and security requirements. We perform an extensive evaluation of our technique on a sample of 451 information systems. Further, we use security testing on a sample extracted from the resulting prioritized systems to investigate the presence of vulnerabilities. Our technique achieved promising results of successfully assigning security levels to various assets in the tested environments and also found several vulnerabilities in them.