大理州Rh(D)阴性无偿献血者血清学表型和不规则抗体的调查

目的:了解大理州无偿献血者Rh(D)阴性血型的血清学表现型及不规则抗体存在情况。方法:检测献血者样本136 803例,采用血清学方法确证Rh表现型,使用抗人球蛋白试剂对不规则抗体作筛查。结果:确证Rh(D)阴性献血者209例(0.15%);其中含不规则抗体1例(0.48%),血清学表现型中:ccdee 123例(58.85%),Ccdee 67例(32.06%),CCdee 7例(3.35%),ccdEe 6例(2.87%),CcdEe 5例(2.39%),CCdEe 1例(0.48%)。该阴性献血者ABO血型分布情况AOBAB。结论:对献血者Rh(D)阴性血型的血清学表现型及不规则抗体作检测,将有利于为临床安全及时有效输血提供保障。     

结合旋转求包含多边形的最小正三角形

文[1]对寻找包含平面多边形的最小正三角形问题提出了一种基于遗传算法的求解方法,用此求解方法所求的最小正三角形必须有一边平行于x轴.本文将所给多边形进行旋转,在不同旋转角度下应用遗传算法求一边平行于x轴且包含相应多边形的最小正三角形.比较不同旋转角度下的结果,就可以得出比文[1]更好的选择.本文还以实例验证了以上思路是正确的.     

拉深件毛料外形的计算机辅助模拟与实验验证

汇场法已被证明是一种可行的理论方法。本文进一步研究了它对平面异形拉深零件外形的自动处理,绘出了自动绘制出的异形件毛料外形,用拉深实验检验了汇场法自动确定的几件典型零件毛料外形。在此基础上,提出了汇场法对设置拉深凸埂的指导作用,同时指出汇疡法确定毛料外形的精度可通过汇强的调整来改善。     

无过渡圆角多边形孔的数控铣削方法

针对模具制造工件上有无过渡圆角的盲方孔、多边形孔不能用切削的方法加工的问题，经过对有代表性的方孔铣削工艺所进行的研究提出了在加工中心上采用专用的数控工具铣头，使主轴在作旋转的同时能与Ｘ，Ｙ两方向的伺服电机实现三轴联动来完成无过渡圆角多边形孔的数控铣削方法．     

安徽新昌大厦结构设计

安徽新昌大厦为平面及竖向不规则结构,平面形状为三角光滑圆弧环形,属平面超长结构。文章介绍采用钢筋混凝土少墙‐框架结构体系,既能满足建筑使用功能要求,又解决结构扭转不规则及竖向刚度突变的问题,从而避免超限高层抗震设防专项审查。对于结构超长的问题,采取按计算温度应力配筋,并结合楼板后浇带设置 U 型槽等多种施工措施加以解决。     

Measuring and locating zones of chaos and irregularity

The new measures computed here are the spectral detrended fluctuation anatysls （sDFA） and spectral multi-taper method （sMTM）. sDFA applies the standard detrended fluctuation analysis （DFA） algorithm to power spectra, sMTM exploits the minute increases in the broadband response, typical of chaotic spectra approaching optimal values. The authors chose the Brusselator, Lorenz, and Duffing as the proposed models to measure and locate chaos and severe irregularity. Their series of chaotic parametric responses in short time-series is advantageous. Where cycles have only a limited number of slow oscillations such as for systems biology and medicine. It is difficult to create, locate, or monitor chaos. From 50 linearly increasing starting points applied to the chaos target function （CTF）; the mean percentage increases in Kolmogorov-Sinai entropy （KS-Entropy） for the proposed chosen models; and p-values when the models were compared statistically by Kruskal-Wallis and ANOVA1 test with distributions assumed normal are Duffing （CTF： 31%： p 〈0.03）; Lorenz （CTF： 2%： p 〈0.03）, and I3russelator （CTF： 8%： p 〈0.01）. Principal component analysis （PCA） is applied to assess the significance of the objective functions for tuning the chaotic response. From PCA the conclusion is that CTF is the most beneficial objective function overall delivering the highest increases in mean KS-Entropy.     

PDE-Based Medial Axis Extraction and Shape Manipulation of Arbitrary Meshes

Shape skeletonization （i.e., medial axis extraction） is powerful in many visual computing applications, such as pattern recognition, object segmentation, registration, and animation. In this paper, the authors expand the use of diffusion equations combined with distance field information to approximate medial axes of arbitrary 3D differential properties. It offers an alternative solids represented by polygonal meshes based on their but natural way for medial axis extraction for commonly used 3D polygonal models. By solving the PDE along time axis, this system can not only quickly extract diffusion-based medial axes of input meshes, but also allow users to visualize the extraction process at each time step. In addition, the proposed model provides users a set of manipulation toolkits to sculpt extracted medial axes, then use diffusion-based techniques to recover corresponding deformed shapes according to the original input datasets. This skeleton-based shape manipulation offers a fast and easy way for animation and deformation of complicated mesh objects.     

基于图论的网络文件并行传输问题分析

根据网络文件分配与调度的特点,用图论的方法对文件并行传输问题进行了详细的分析,并且结合具体的实例提出了优化文件并行传输的调度算法。     

结合时间相关特征改进中国区域二氧化碳卫星观测数据的地统计分析

通过卫星从空间观测全球大气二氧化碳(CO2)浓度为全球碳循环研究提供了新的数据源.虽然卫星可以进行高密度点观测,但是由于云和卫星观测模式等影响,卫星观测点数据在空间上呈不规则分布且存在大量无观测值的空白区域.精确填补这些空白区