秦岭－黄淮平原交界带热量资源分析

本文推导了秦岭－黄淮平原交界带任意地点平均气温的计算公式，并分析其平均气温的分布特征。揭示了本区全年均比周围同纬度地区有更丰富的热量资源，特别是冬季，交界带平均气温明显高于黄淮平原。同时，区内的低山丘陵普遍存在着坡地暖带，暖带的最暖高度约在海拔３５０—４００ｍ左右。本区的暖温带地区，在北靠较高山地南有河谷平川或水体的冷空气难进易出的向阳坡，广泛存在着“亚热带小区”，小区中有特别丰富的热量资源可供利用。     

不对称品牌联盟对弱势品牌稀释研究:"攀龙附凤"还是"引火烧身"?

本研究借助最小均方联结模型来解释和分析不对称品牌联盟对弱势品牌的稀释作用.同时,利用实验证明了该种稀释作用的存在,而且可以利用业务多元化和品牌互补性来调节或减缓该负面作用.该研究对中国日益盛行的国内和国际品牌联盟提出警示即中国品牌与国际品牌的联合可能由"攀龙附凤"的惊喜落到"引火烧身"的恶果.     

铑催化的1,6-烯炔环异构化反应研究（英文）

对铑催化的1,6-烯炔环异构化反应进行了研究,这类反应具有较广的底物适应范围,在转化过程中,卤素发生了分子内转移。这类反应提供了一条新的立体选择性合成具有α-氯烯基结构的丁内酯、丁内酰胺、四氢呋喃、吡喃以及五元碳环等分子的方法。发展了两种不同的催化剂体系,即阳离子催化剂体系和中性催化剂体系。阳离子催化剂体系仅能催化顺式烯炔底物的环异构化,相反中性催化剂体系不但能催化顺反烯炔底物的环异构化,而且具有更广的底物适应范围。利用各种烯炔异构体,通过合适的控制实验对反应机理进行了研究。提出了涉及π-烯丙基铑中间体的可能机理,并且利用该机理对一些反应现象进行了解释。最后利用Suzuki偶联反应对产物进行了衍生。     

Evidence for diurnal periodicity of earthquakes from midnight to daybreak

Previously, inadequate earthquake catalogs and the lack of method made it challenging, if not impossible, to determine the dominant period of earthquake occurrence. With the advent of densely distributed seismic stations in Japan since 2002, 410 642 M1.0+ earthquakes have been cataloged under the mainland within 30-km depth, which provide a superb dataset to identify the periodicity of earthquakes. We processed this catalog using time-frequency analyses and daily stacking, which are powerful in extracting weak periodical signal from strong random noises. We concentrated on the time sector from 0:00 to 6:00 (i.e. from midnight to daybreak), which is a reliable time window for much higher detectability of weak earthquakes, since it has the lowest affects from cultural noises. We successfully observed two apparent periodicities of 12- and 24-hour, which are much smaller than the fortnightly periodicity presented previously in the literature. Synthetic earth tides, after intentionally ignoring the contribution from the Moon, present similar dominant periods as the earthquakes. This may indicate that the dominant period of earthquakes is statistically associated with the Sun rather than the Moon. The daily stacking number of earthquakes using a 15-minute or 1-hour interval shows a peak around 1:30, rather than usually expected 3:00 to 4:00. In addition, bigger earthquakes show more evident variations in the stacking results, and the trend is very consistent for various lower limits of earthquake magnitude from M1.0 to M4.0. These discoveries settled the disputes on the existence of the periodicity of earthquakes since 1886 and may open a window to unravel the mystery of earthquakes.     

试析中庸之道对中国传统养生体育文化的影响

中庸是儒家倡导的天地大道和人之成仁的道德品质。按照中国哲学"天人合一"的思维方式，遵循中庸之道是人们涵养道德和提升人生境界的必由之路，被后世广泛应用在人类社会生活的各个方面，特别是传统养生体育。运用文献资料、逻辑分析等研究方法探讨中庸之道对传统养生体育文化的影响。研究认为：中庸不等同于折中主义，是适中不偏和恰到好处之道；保持情绪平和、谨和五味、劳逸适度的养生原则体现了中庸之道对传统养生文化的影响；中庸之道对传统养生体育文化的影响主要体现在调身、调息、调心的标准、对练习火候的把握及涵养狭义道德的具体要求。     

Automatic segmentation of bladder in CT images

Segmentation of the bladder in computerized tomography （CT） images is an important step in radiation therapy planning of prostate cancer. We present a new segmentation scheme to automatically delineate the bladder contour in CT images with three major steps. First, we use the mean shift algorithm to obtain a clustered image containing the rough contour of the bladder, which is then extracted in the second step by applying a region-growing algorithm with the initial seed point selected from a line-by-line scanning process. The third step is to refine the bladder contour more accurately using the rolling-ball algorithm. These steps are then extended to segment the bladder volume in a slice-by-slice manner. The obtained results were compared to manual segmentation by radiation oncologists. The average values of sensitivity, specificity, positive predictive value, negative predictive value, and Hausdorffdistance are 86.5%, 96.3%, 90.5%, 96.5%, and 2.8 pixels, respectively. The results show that the bladder can be accurately segmented.     

Embedding ensemble tracking in a stochastic framework for robust object tracking

We propose an algorithm of embedding ensemble tracking in a stochastic framework to achieve robust tracking performance under partial occlusion, illumination changes, and abrupt motion. It operates on likelihood images generated by the ensemble method, and combines mean shift and particle filtering in a principled way, where a better proposal distribution is designed by first propagating particles via a motion model, and then running mean shift to move towards their local peaks in the likelihood image. An observation model in the particle filter incorporates global and local information within a region, and an adaptive motion model is adopted to depict the evolution of the object state. The algorithm needs fewer particles to manage the tracking task compared with the general particle filter, and recaptures the object quickly after occlusion occurs. Experiments on two image sequences demonstrate the effectiveness and robustness of the proposed algorithm.     

Mean Shift算法在彩色图像分割中的应用

Mean Shift算法是目前广泛应用于图像分割和计算机视觉中的方法。论述了该算法应用在彩色图像分割中的原理及过程,并给出实验过程和结果。     

CIPP评价模式在《计算机应用基础》课程中的应用

通过对CIPP评价模式的研究分析,提出以CIPP评价模式进行高校《计算机应用基础》课程教学过程的评价,从而达到促进教学改革、实现教学评价循环反馈的效果.     

试论传统形意拳中“贵和尚中”的民族文化精神

文章从文化哲学的视角,对传统形意拳文化体系进行了深入细致的逻辑分析,透视出传统形意拳理论和技法体系是在“贵和尚中”的思维模式和价值理念制约下所形成的,并在长期而系统的功法、套路、对抗等训练和实战中,将其内化为习者的行为规范和行为模式,最终在日常生活方式上体现出“贵和尚中”的民族文化精神。