定点测量倾斜偏角计算方法分析

本文研讨用四元数对采用复摆测量钻井和结构物倾斜偏角的计算方法和误差分析     

近距离高瓦斯煤层群倾斜高抽技术的应用研究

分析了沙曲矿14201工作面的瓦斯涌出特点,对倾斜高抽巷治理瓦斯的工艺技术参数进行了优化,观测了高抽巷治理瓦斯的效果.研究表明,在沙曲矿三软条件下近距离高瓦斯煤层群实施倾斜高抽技术治理瓦斯效果明显,能够抽放出大量的高浓度瓦斯,为工作面的安全生产提供了技术保障.     

倾斜侧吹气液射流在熔池中的轨迹

根据动量定理，推导出倾斜侧吹气液射流轴线在熔池中的无因次轨迹方程，对于空气向水中喷吹，计算射流轴线与实测射流轴线基本一致。     

倾斜起吊在锅炉汽包安装中的应用

结合具体事例，就锅炉汽包中倾斜起吊安装施工制定合理的方案，供同行在类似工程施工时参考。     

倾斜管道水力坡度的研究

针对国内倾斜管道水力坡度的研究较少,在工程中,管道输送不可避免地要穿过地势起伏较大的地区的情况,研究了倾斜向下管路中的水力坡度损失.在前人的研究基础上,推导出了向下倾斜管道沉降性浆体的水力坡度计算公式.其次,还利用相关数据对推导出的公式进行了检验,比较了计算值与实测值的差异,结果两者误差很小.最后分析了推导出的公式存在的不足,提出了下一步要做的工作.     

多层重叠薄块和最佳倾斜非饱和激发磁共振血管造影在脑动静脉畸形诊断中的应用

目的：分析脑动静脉畸形(arteriovenous malformations，AVM)的三维时间飞越法磁共振血管造影(3D-Time of Hight Magnetic Resonance Angiography，3D-TOFMRA)结合多层重叠薄块(multiple overlapping thin slab acquisition，MOTSA)和最佳倾斜非饱和激发(tilted optimized nonsaturating excitation，TONE)技术的磁共振成像表现，探讨其应用价值。方法：对150例AVM患分别行SE序列磁共振成像(MRI)，3D-TOF MRA结合MOTSA和TONE检查。结果：MR／及3D-TOF MRA都能显示AVM的瘤巢，AVM的继发改变MRI能很好地显示，MRA能显示AVM的三维解剖结构。结论：MOTSA结合TONE MRA是无创性评价脑AVM的有效方法，结合MRI可提高诊断准确率，为临床治疗方案的选择提供帮助并能对治疗效果进行客观评价。     

Locomotor kinematics of the gecko （Tokay gecko） upon challenge with various inclines

Tokay geckos are skillful climbers and are able to negotiate difficult terrain such as steep slopes and overhanging inclines without losing their foothold. Here, we present data on the changes in locomotor kinematics when geckos are challenged to walk on various inclined surfaces. We trained individual geckos to move along a platform which can be tilted to simulate different slopes. The animals were filmed using a high-speed video camera. The results showed that their speed decreased with increasing slope angle, and their speed on the steep and inverted slopes （sloped angle 〉60~） decreased at a faster rate than on the shallow slopes （sloped angle 〈60~）. The geckos＇ stride length was much greater on the shallow slopes compared to the inverted slopes. The influence of stride length and stride frequency on speed was different when the geckos moved across different slopes. There are significant differences duty factor, which varied from 0.54 when wall climbing （90° slope） to 0.84 when walking on the ceiling （180° slope）. The mechanisms revealed this study will improve our understanding of control strategies in kinematics and inspire the design of robots with greater mobility.