基于非线性形状先验的高分辨率遥感图像目标提取方法

对已知目标形状,利用核主成分分析方法非线性建模,并根据高分辨率遥感图像特点,提出一种新的融入形状先验、图像边缘、颜色以及阴影信息的目标提取方法.该方法构造了基于活动轮廓模型的能量函数,并通过迭代的全局最优化方法最小化,实现对目标的准确分割提取.实验结果表明,该方法不仅能准确高效分割提取目标区域,而且能抵制背景噪声干扰,具有很强的鲁棒性和实用价值.     

中国乒乓球队制胜因素的实证研究

中国乒乓球队之所以能够长胜不衰,雄踞世界乒坛,是与多年来乒乓球队技战术的精彩演绎及强有力的后备人才培养分不开的。中国乒乓球队制胜因素即“三件宝”是指技术组合的多样化、击球点的全面性以及反方向技术的应用能力,这三个方面对取得比赛的胜利起着关键的作用。主要通过观察法和数理统计法对这"三件宝"在优秀运动员比赛过程中的应用情况进行了研究,力求发现其中的规律,为运动员今后的训练提供参考依据。     

解读未注册商标在我国的法律保护——以我国2013新《商标法》为视角

文章从未注册商标在我国商标法中的法律地位谈起,根据现行商标法分析了未注册商标的三重保护机制,对于新商标法中未注册商标的保护加以肯定的同时仍然就其在转让和许可使用方面效力规定的缺失、未注册商标使用和管理的混乱、先用权制度的不足方面提出了自己的建议。     

Effects of changing speed on knee and ankle joint load during walking and running

Joint moments can be used as an indicator of joint loading and have potential application for sports performance and injury prevention. The effects of changing walking and running speeds on joint moments for the different planes of motion still are debatable. Here, we compared knee and ankle moments during walking and running at different speeds. Data were collected from 11 recreational male runners to determine knee and ankle joint moments during different conditions. Conditions include walking at a comfortable speed (self-selected pacing), fast walking (fastest speed possible), slow running (speed corresponding to 30% slower than running) and running (at 4 m · s^?1 ± 10%). A different joint moment pattern was observed between walking and running. We observed a general increase in joint load for sagittal and frontal planes as speed increased, while the effects of speed were not clear in the transverse plane moments. Although differences tend to be more pronounced when gait changed from walking to running, the peak moments, in general, increased when speed increased from comfortable walking to fast walking and from slow running to running mainly in the sagittal and frontal planes. Knee flexion moment was higher in walking than in running due to larger knee extension. Results suggest caution when recommending walking over running in an attempt to reduce knee joint loading. The different effects of speed increments during walking and running should be considered with regard to the prevention of injuries and for rehabilitation purposes.     

中美首位城市与首府城市对比与思考

本文对比了中美两国首府城市(包括首都)与该地区首位城市的重叠比率,并在此基础上讨论其中的社会管理体制和文化传统,这个差异不仅反映了社会发育的不同阶段,尤其反映了不同的历史根基。     

约化弦EKR理论背景方程的二重逆散射方法

文章首先构造了约化弦EKR理论背景方程的二重形式,然后给出了适合于该理论的二重逆散射方法,并利用此方法求取了该理论的二重孤子解族。     

反三角函数是怎样产生的？

三角函数学了正弦、余弦和正切,没学余切、正割和余割;更没学反三角函数了!这就是今年某些大专新生在初等数学方面的薄弱之处;读懂本文后,新生们一定能有所弥补,在进校后的高等数学学习中扎实地迈进一大步。     

3种插值法对重金属空间分布求解与对比分析

运用反距离加权插值法、三角线性插值法、Hermite插值对法同一地区的8种重金属的空间分布进行了插值分析,并对结果进行分析对比,发现该地区除汞适合三角线性插值法以外其他均适合反距离加权插值方法.证明了重金属分布的含量与特点决定了插值方法的选取,进一步丰富了插值法对重金属的空间分布实际应用,并结合区域的功能进行分析,使空间分布更能结合于实际应用.     

Strategic transfer: A tool for academic problem solving

Within the context of classroom learning, strategic transfer can be viewed as a tool for academic problem solving. Strategic transfer is defined as the spontaneous access and retrieval (remembering) of previously learned formal procedures for the successful solution of a problem. The transfer-appropriate processing encoding model (Morris, Bransford, and Franks, 1977), and the transfer-appropriate procedures retrieval model (Roediger, Weldon, and Challis, 1989) are reviewed. An integration of the two models is proposed through the development of a training-for-transfer paradigm (Phye, 1990). By integrating encoding and retrieval processing in a single transfer paradigm the issue of accessing prior knowledge (Bransford, 1990) that is also referred to as the inert knowledge problem (Whitehead, 1929) can directly be addressed.     

预科《基础化学》教学探索

对预科基础化学教学方法进行探讨和研究,并根据在教学实践中的体会,对基础化学教学提出一些意见和看法,建立了“以补带预”的教学模式.