用有限元确定起重机裂纹补强板的参数

采用ANSYS有限元分析软件，对因出现裂纹的起重机主梁而添加的补强板进行系列计算，得出修补后主梁裂纹的应力及应力强度因子的变化规律。结果表明，采用参数适当的补强板，可降低起重机主梁裂纹尖端的应力，从而保证起重机的安全。     

进口与国产高强度耐磨钢板的组织及力学性能

观察了进口、国产高强度耐磨钢板的组织，测试了它们的力学性能及耐磨性能。结果表明，国产准贝氏体钢耐磨板具有良好的强韧性配合，耐磨性能超过进口耐磨钢板，能够替代进口板作为高强度耐磨板。     

水对植物纤维水泥复合板生产的影响

研究了水对植物纤维水泥复合板性能的影响。选择合适的水分可以提高板材静弯曲强度,减小板材变形。     

基于复合顺序形态变换的车牌边缘检测

边缘检测是图像分割的重要环节,边缘提取的好坏直接影响了整个图像处理的效果。数学形态学用具有一定形态结构的“结构元素”去度量图像的形态,以解决图像处理和分析问题。文章通过对多种边缘检测方法的分析比较,结合高速公路路口汽车图像噪声大的特点,提出了基于复合顺序形态变换的车牌边缘检测。该方法不但能有效地改善有噪图像边缘检测的效果,鲁棒性好,而且并行快速,便于硬件实现。     

Dynamic response of a Mindlin elastic rectangular plate under a distributed moving mass

The elastodynamic response of a rectangular Mindlin plate subjected to a distributed moving mass is investigated. The set of governing characteristic partial differential equations that include the effects of shear deformation and rotary inertia is expressed in its dimensionless form. A finite difference algorithm is employed to transform the differential equations into a set of linear algebraic equations. Simply supported edge conditions were used as an illustrative example. The analysis is also valid for other edge conditions. It is found that the maximum shearing forces, bending and twisting moments occur almost the same time. Also, the values of the maximum deflections are higher for Mindlin plates than for non-Mindlin plates.     

型芯与推板双锥面配合脱模机构设计

介绍了一种型芯与推板双锥面配合脱模机构设计，分析了结构特点及制造加工工艺性。     

自由锻锤上冷冲厚板新工艺

介绍了自由锻锤上冷冲厚板工艺的特点和模具主要结构。以及如何解决凸凹模间隙、选用小间隙冲孔时刃口磨损加剧的问题。研制出了降低磨损。提高模具寿命的润滑剂配方。设计了适合自由锻锤上厚板冲孔的模具，对在自由锻锤上厚板冲孔进行了有益的尝试。扩大了自由锻设备的加工范围。解决了不具备大型压力机情形下的生产难题。     

某供用电综合楼地下基础底板堵漏防水技术

结合工程概况，分析了负二层地下基础底板渗漏的原因，介绍了防水堵漏方案的设计与优选以及主要施工工艺，实践证明，该工程堵漏防水技术可靠，效果良好，保证了工程的顺利进行。     

舞钢管线钢的开发与生产

系统介绍了舞钢开发的针状铁素体型X70宽厚板的设计思路、工艺特点和实物水平；采用电炉 炉外精炼 连铸 TMCP工艺生产的X70宽厚板满足西气东输专用技术条件的要求，并批量应用在西气东输主干线工程中。     

Inference for pth‐order random coefficient integer‐valued autoregressive processes

Abstract. A pth‐order random coefficient integer‐valued autoregressive [RCINAR(p)] model is proposed for count data. Stationarity and ergodicity properties are established. Maximum likelihood, conditional least squares, modified quasi‐likelihood and generalized method of moments are used to estimate the model parameters. Asymptotic properties of the estimators are derived. Simulation results on the comparison of the estimators are reported. The models are applied to two real data sets.