资中冬尖的加工技术

本文介绍了在传统生产工艺基础之上进行改进了的资中冬尖生产工艺及产品质量指标。     

The mean and variance of rank and exponential score product moment statistics in the non-circular case

This paper gives a general formula for the first two moments of the non-circular product moment statistic, which is used as a test for the statistical independence of the interarrival times of certain time series data, e.g., neuronal spike discharges. For the special cases of rank and exponential score product moment statistics, the mean and variance are formulated.     

简论欧·亨利作品的艺术表现手法

欧·亨利是美国二十世纪初期最著名的短篇小说家之一。他的作品有趣而又意味深长 ,反映了当时美国的社会现实。作者以其独特的写作方法而在美国史上占有重要的地位     

Cell Proliferation and Formaldehyde-Induced Respiratory Carcinogenesis

Formaldehyde is a nasal carcinogen in the rat but the cancer risk this chemical poses for humans remains to be determined. Formaldehyde induces nonlinear, concentration-dependent increases in nasal epithelial cell proliferation and DNA-protein cross-link formation following short-term exposure. Presented in this review are results from a mechanistically based formaldehyde inhalation study in which an important endpoint was the measurement of cell proliferation indices in target sites for nasal tumor induction. Male Fischer 344 rats were exposed to 0, 0.7, 2, 6, 10, or 15 ppm formaldehyde for up to 2 years (6 hr/day, 5 day/week). Statistically significant increases in cell proliferation were confined to the 10 and 15 ppm groups, which remained elevated throughout the study. The concentration-dependent increases in cell proliferation correlated strongly with the tumor response curve, supporting the proposal that sustained increases in cell proliferation are an important component of formaldehyde carcinogenesis. The nonlinearity observed in formaldehyde-induced rodent nasal cancer is consistent with a high-concentration effect of regenerative cell proliferation of the target organ coupled with the genotoxic effects of formaldehyde. Cell kinetic data from these studies provide important information that may be utilized in the assessment of risk for humans exposed to formaldehyde.     

ROBUST ANALYSIS OF THE BIFURCATING AUTOREGRESSIVE MODEL IN CELL LINEAGE STUDIES

A robust estimation procedure for the bifurcating autoregressive model in cell lineage studies is proposed. The method is illustrated by application to a real data set and is compared with least squares estimates in a small simulation study.     

《欢乐的牧民》中大提琴的双重角色及其表现

《欢乐的牧民》是由作曲家戴天佑为大提琴所创作的曲目,无论从乐曲的风格,艺术氛围、乐器角色及各种演奏技巧方面都表现地恰如其分,独到好处,聆听后令人寻味、为之感叹,现就以上的内容对此曲进行试探,从而对该曲有更进一步的认识和理解,更好地去领略此乐曲的音乐内涵是本文的目的所在.     

清代青藏高原农业技术的地域类型与空间特征

清代青藏高原的农业技术存在着不同的地域类型,而作物种植的垂直差异使技术类型的空间分布更具复杂多样性。该地区的作物结构及其分布,典型地反映出高寒农业的特点。单一的种植制度、粗放的耕作方式、落后的水利技术和低效率的工具组合,亦体现了清代青藏高原的自然与人文社会环境条件对农业技术选择的制约作用。     

论《世说新语》的叙事技巧

《世说新语》是我国古代＂志人小说＂的典范之作,在人物刻画与叙事技巧方面有着突出的贡献,形成了自身独特的风格：记言与记事的巧妙结合,兼顾历史性与文学性;极度的讽刺夸张,对中国传统的叙事文学既有继承,又有突破;运用对比、烘托手法,突出人物状貌及性格,烙上鲜明的时代印记;通过传神的细节描写,于细微处见精神,表现人物的风貌。     

关于细胞生物学本科教学的探索与思考

细胞生物学是高等学校生物类专业的必修课程之一,针对细胞生物学的课程特点,总结几年来教学过程中的实践经验,提出有助于提高教学效果和增强学生学习兴趣的几点体会。     

细胞图像分割的新方法

细胞图像分割是细胞图像识别过程中最困难也是最重要的步骤之一。本文针对临床使用的宫颈巴氏染色涂片细胞图像的特点,提出了二种新方法:自适应窗和去粘连法。在自适应窗内只有单个细胞存在,然后在窗内采用最大方差阀值法对该细胞进行分割;去粘连法避免了通常使用的腐蚀、膨胀次数难以确定的缺点,使粘连的细胞互相分离。经过病理学家对1100个细胞的测试,证明这二个方法对提高分割效果很有效。