单页单面汉字纵横切碎片拼接复原算法

对于纵切汉字碎片依汉字的方正特征进行复原,对于纵横切汉字的碎片根据空行和汉字位置对碎片进行分组,并建立边界像素点匹配度进行组内碎片拼接,最后利用边界汉字宽度进行组间拼接。并对两个实际例子进行了拼接试验,试验结果表明该算法是有效的。     

脉冲激光沉积法在多孔硅衬底上制备ZnS薄膜

用电化学阳极氧化法制备了一定孔隙率的多孔硅样品,然后用脉冲激光沉积法以PS为衬底生长一层ZnS薄膜.用X射线衍射仪、扫描电子显微镜和荧光分光光度计分别表征了ZnS薄膜的结构、形貌和ZnS/PS复合膜的光致发光性质.XRD结果表明,制备的ZnS薄膜沿β-ZnS(111)方向择优生长,结晶质量良好,但衍射峰的半峰全宽较大;SEM图像显示,ZnS薄膜表面出现一些凹坑,这是衬底PS的表面粗糙所致.室温下的光致发光谱表明,沉积ZnS薄膜后,PS的发光峰蓝移.把ZnS的蓝绿光与PS的橙红光叠加,在可见光区450~700 nm形成了一个较宽的光致发光谱带,ZnS/PS复合膜呈现较强的白光发射.     

低强度脉冲超声波对兔内侧副韧带愈合的影响

目的探讨低强度脉冲超声波(LIPUS)对兔内侧副韧带断裂愈合的影响。方法成年兔20只,制备双膝关节内侧副韧带(MCL)断裂模型,一侧对照组,另一侧术后24 h给予低强度脉冲超声波治疗。术后6周取2组兔膝关节行大体观察,韧带胶原总含量,I、III型胶原表达及生物力学检测。结果低强度脉冲超声波治疗组极限负荷、刚度检测及韧带I型胶原表达较对照组明显提高(P<0.05),胶原总含量和III型胶原表达也高于对照组,但无显著性差异(P>0.05)。结论 低强度脉冲波对膝关节内侧副韧带断裂修复具有促进作用。     

脉冲涡流无损检测信号滤波方法研究

为了得到高信噪比、低失真度的涡流无损检测信号,以Matlab为仿真工具,对滑动窗口滤波法、频域滤波法、小波滤波法进行模拟仿真,对比滤波效果,确定小波阈值滤波为最终滤波方法,滤波参数为:Coif 3小波基、3层小波分解、启发式阈值,滤波后信号信噪比高、局部特征保留完整。     

浅谈铸铁的炉前检测方法

在铸铁生产中,炉前检测铁水化学成分主要有仪器检测和经验检测两种方法.其中,仪器检测有直读光谱仪测定法和热分析法;经验检测主要指铸造企业凭经验或借助三角试块白口宽度来预测铸铁牌号或成分的方法.分析了如何使用这两种检测方法对铁水进行炉前检测.     

Mathematical model for abrasive suspension jet cutting based on orthogonal test design

This paper describes the application of orthogonal test design coupled with non-linear regression analysis to optimize abrasive suspension jet (AS J) cutting process and construct its cutting model. Orthogonal test design is applied to cutting stainless steel. Through range analysis on experiment results, the optimal process conditions for the cutting depth and the kerf ratio of the bottom width to the top width can be determined. In 'addition, the analysis of ranges and variances are all employed to identify various factors: traverse rate, working pressure, nozzle diameter, standoff distance which denote the importance order of the cutting parameters affecting cutting depth and the kerf ratio of the bottom width to the top width. Furthermore, non-linear regression analysis is used to establish the mathematical models of the cutting parameters based on the cutting depth and the kerf ratio. Finally, the verification experiments of cutting parameters' effect on cutting performance, which show that optimized cutting parameters and cutting model can significantly improve the prediction of the cutting ability and quality of ASJ.     

Firey linear combinations of convex bodies

For convex bodies, the Firey linear combinations were introduced and studied in several papers. In this paper the mean width of the Firey linear combinations of convex bodies is studied, and the lower bound of the mean width of the Firey linear combinations of convex body and its polar body is given.     

浙江省高校学报幅面尺寸的现状调查与分析

对2008年出版的45种公开发行的浙江省高校学报的幅面尺寸进行了调查。在被调查的45种高校学报中,仅9种高校学报的幅面尺寸符合GB／T788-1999《图书和杂志开本及其幅面尺寸》的要求,占20．00％。对浙江省高校学报幅面尺寸存在的问题和幅面尺寸不符合国家标准的原因进行了分析,以期引起广大编辑同仁及期刊出版管理部门的重视。     

概念整合理论与二语词汇习得

二语词汇的习得在认知语言学的指导下出现了新的发展趋势。许多学者将认知语言学中的子理论运用到二语词汇习得的研究当中,取得了斐然的成绩,并且也从另一个侧面验证已有的词汇习得方面的理论。笔者在介绍认知语言学子理论概念整合理论的基础上,探讨基于这一理论的第二语言词汇习得。     

The 600-mm precipitation isoline distinguishes tree-ring-width responses to climate in China

The numerous temperature and precipitation reconstructions in China based on tree-ring-width data have played significant roles in furthering the understanding of past climate changes. However, the geographical variability in the responses of trees to climate variations in China remains largely undetermined. Here, we describe an important spatial boundary in the response of trees to climate variations, namely the 600-mm annual precipitation isoline. We found that, to the north of this line, tree-ring widths are usually positively correlated with precipitation and negatively correlated with growing-season temperature. To the south of this line, the tree-ring widths respond positively to temperature, and winter half-year temperatures are the main reconstructed parameters, especially on the third topographical step of China. We also found that precipitation reconstructions based on tree-ring data and the Palmer Drought Severity Index almost exclusively fall in the region of the 200- to 600-mm annual precipitation isolines, not other regions. Our findings indicate that, when using multiple tree-ring-width chronologies for large-scale past climate reconstructions, the climatic signal of each tree-ring-width series should be carefully considered.