Mechanical analysis on deformation of surrounding rock with road-in packing of gob-side entry retaining in fully-mechanized sub-level caving face

Based on the movement regularity of surrounding rock with road-in packing of gob-side entry retaining in fully-mechanized sub-level caving face(RPGERFCF),the me- chanical model of its surrounding rock was established and the calculating formulas of the deformation of the roof,coal wall and filling body were attained.By the mechanical analy- sis to the deformation of the surrounding rock of RPGERFCF,the major factors influencing the deformation of the surrounding rock were found out and the technologic approaches reduced the deformation and enhanced the stability of the surrounding rock were put for- ward.Consequently,the scientific bases were provided for the stability control of the sur- rounding rock of RPGERFCF.

Analysis on distribution law of the abutment pressure of the integrated coal beside the road-in packing for gob-side entry retaining in fully-mechanized caving face

The three-dimensional damage constitutive relationship of coal is established and distribution law of the abutment pressure of the integrated coal beside the road-in packing for gob-side entry retaining in fully-mechanized caving face under the effect of given deformation of the main roof is analyzed by the damage mechanics theory. And the relationship between distribution of the abutment pressure and thickness of coal seam is explored. The presented result is of great theoretical significance and practical value to the study on stability control of the surrounding rock of road-in packing for gob-side entry retaining in fully-mechanized caving face.

高职院校道路与桥梁工程专业的人才培养规格

人才培养规格从属于人才培养目标 ,是将目标具体化为人才质量的标准 ,既包含着人才培养的方向、层次、类型 ,也包含着特定专业的自身特性 .结合当前我国道路与桥梁行业发展的需要 ,对高职院校道路与桥梁工程专业人才培养目标和人才培养规格进行了阐述 .

干扰素治疗多发性骨髓瘤及其他造血器官肿瘤(白血病除外)

近年来 ,干扰素已广泛地应用于各种难治性疾病的治疗 ,而且疗效优异。在恶性肿瘤、难治性病毒性肝炎等的治疗上 ,尤其引人瞩目。为进一步开拓干扰素治疗的适应证、合理地发挥干扰素的治疗优势 ,日本医师会杂志 2 0 0 2年第 12 8卷 ,第 7期 ,刊出特集———インタ フエ ロンの临床 ,全集总结、回顾了近 2 0年来 ,干扰素在多个领域、多种疾病中的治疗成果。

面向越野自主导航的鲁棒GPS/INS融合定位系统

实时可靠的三维定位能力是自主车实现越野自主导航的前提。提出了一种基于全状态空间扩展卡尔曼滤波的GPS/INS融合算法。在考虑传感器误差源的基础上建立了系统观测方程。以连续状态空间为基础并加以离散化后建立了系统状态方程。最后由扩展卡尔曼滤波器实现了系统状态的可靠估计。该算法可以放松以往对INS误差精确建模的要求,并能有效地应对由路面剧烈颠簸导致的INS短时失效和由遮挡等原因导致的GPS失效。实验结果表明该GPS/INS融合定位系统是可靠和成功的。

土壤固化剂在铁路施工道路路基处理中的应用

对道路路基掺入土壤固化剂后固化土混合料的无侧限抗压强度、水稳系数和凝结时间影响系数进行试验研究,并对试验段路基进行回弹弯沉试验和浸水膨胀量检测。试验结果表明:固化土底基层混合料的无侧限抗压强度提高24. 4%,水稳系数提高11. 8%,凝结时间影响系数提高8. 2%;土壤固化剂掺量的提高可进一步增大固化土混合料的无侧限抗压强度,且固化土基层混合料的水稳系数和凝结时间影响系数增长规律与固化土底基层混合料基本一致;道路1 d弯沉值为67. 04×10^(-2)mm,浸水膨胀量为0. 019%,说明土壤固化剂有较好的早强作用,且提高了固化土混合料的抗水浸能力。较高的无侧限抗压强度和良好的水稳定性能保证了临时道路的承载能力。

基于车载SPEEDBOX-INS和车身行驶参数的道路曲线识别方法

利用车载SPEEDBOX-INS采集汽车行驶过程中的行驶车速、路程和车身姿态等参数。在MATLAB中对采集到的特定参数进行小波去噪、曲线拟合和判断筛选等。这可为汽车行驶提供信息支持,可大大提高行驶安全性。

路网辅助的车载INS/GPS组合导航方法

针对车载INS/GPS组合导航系统在GPS无效时精度迅速下降的问题,提出了将车辆行驶的路网约束作为虚拟传感器,采用多传感器数据融合的方式,与INS和GPS组成INS/GPS/路网组合导航系统.当GPS失效时,使用路网辅助INS.仿真结果表明,在GPS无效时间段,该方法能有效减小系统定位误差.