鲁藜诗歌的生命意识

鲁藜的诗歌紧扣生命的主题,礼赞生命的奋斗不息,创造生命的壮举,讴歌生命的价值和意义,折射出强烈的生命意识.生命因苦难而"绽放".生命因追求而美丽.生命的升华与超越不仅体现在对个体生命的价值与意义的追问上,还体现在对群体生命、"大我"世界的追求中.向生命的高度攀登,突破"小我"的牢笼,将个体生命投入"大我"的世界,在"大我"的世界里无私地奉献和付出,与群体生命达成一片,最终铸造辉煌的个体生命.     

Assessing Risk‐Based Upper Limits of Melamine Migration from Food Containers

Melamine contamination of food has become a major food safety issue because of incidents of infant disease caused by exposure to this chemical. This study was aimed at establishing a safety limit in Taiwan for the degree of melamine migration from food containers. Health risk assessment was performed for three exposure groups (preschool children, individuals who dine out, and elderly residents of nursing homes). Selected values of tolerable daily intake (TDI) for melamine were used to calculate the reference migration concentration limit (RMCL) or reference specific migration limit (RSML) for melamine food containers. The only existing values of these limits for international standards today are 1.2 mg/L (0.2 mg/dm²) in China and 30 mg/L (5 mg/dm²) in the European Union. The factors used in the calculations included the specific surface area of food containers, daily food consumption rate, body weight, TDI, and the percentile of the population protected at a given migration concentration limit (MCL). The results indicate that children are indeed at higher risk of melamine exposure at toxic levels than are other groups and that the 95th percentile of MCL (specific surface area = 5) for children aged 1–6 years should be the RMCL (0.07 mg/dm²) for protecting the sensitive and general population.     

皖北地区旅游业发展制约因素的个案研究

皖北地区旅游业是安徽省旅游业发展的短板，要实现皖北旅游业快速发展就要深究皖北旅游业发展缓慢的症结所在。本文选取淮北市作为调查点，从主客观方面分析了制约淮北市旅游业发展的因素并提出解决对策，以此为皖北旅游业发展提供借鉴。     

萧寒:一位满族音乐的复兴者

12年前,满族人萧寒第一次知道,自己的祖先是有音乐的. 那时,有21年乐龄的萧寒曾因维持生计在沈阳经营着嬉皮士酒吧.酒吧每周末都组织前卫音乐会、先锋艺术表演、实验戏剧、地下电影展映.在辽沈地区数量不多的文艺青年眼中,“嬉皮士”酒吧就是抱团取暖的篝火,就像它的名字一样,为这座工业城市的刻板生活提供了另一种可能. 萧寒是这团篝火的中心,那年他只有25岁,土生土长在沈阳,个子不高,面目白皙,一头长发,中音浑厚.他从高中时开始迷恋摇滚乐,22岁时组建了乐队“末日毒瘤”,在摇滚乐的震颤中嚣张度日.     

高职英语专业学生听力元认知策略使用情况分析

采用定量分析方法,调查了深圳信息职业技术学院103名英语专业学生的听力元认知策略使用情况。探索性因子分析得出4个影响因子,依使用频率由高到低为:选择注意、猜测联想、方法探索和自我评估。描述性统计分析结果表明,高职英语专业学生听力元认知策略的整体使用频率偏低。     

东方“三月三”民俗浅议

本文结合实地考察,对东方美孚方言区"三月三"民俗文化加以浅议。     

水平井分段多簇压裂缝间干扰研究

水平井分段多簇压裂在现场得到了广泛运用，其压裂过程中普遍存在缝间干扰现象。缝间干扰有助于形成复 杂裂缝网络以提高储层导流能力，但是也会导致起裂困难，甚至形成砂堵。因此有必要对分段多簇压裂的缝间干扰问 题进行研究。对此，基于弹性力学建立了分析多簇裂缝诱导应力的数学模型，从起裂压力、裂缝宽度、簇间距等多方面 研究了缝间干扰对水平井分段多簇压裂施工的影响。模拟结果显示，诱导应力会导致起裂压力升高、裂缝变窄，严重 时将造成压裂施工失败。通过进行分析，给出了起裂过程及延伸过程中缝间干扰的影响关系。分析认为，利用缝间干 扰提高改造体积时应当控制簇间距防止对压裂施工造成负面影响。研究结论对优化水平井分段多簇压裂设计具有指 导意义。     

The empirical Bayes estimators of the parameter of the Poisson distribution with a conjugate gamma prior under Stein's loss function

For the hierarchical Poisson and gamma model, we calculate the Bayes posterior estimator of the parameter of the Poisson distribution under Stein's loss function which penalizes gross overestimation and gross underestimation equally and the corresponding Posterior Expected Stein's Loss (PESL). We also obtain the Bayes posterior estimator of the parameter under the squared error loss and the corresponding PESL. Moreover, we obtain the empirical Bayes estimators of the parameter of the Poisson distribution with a conjugate gamma prior by two methods. In numerical simulations, we have illustrated: The two inequalities of the Bayes posterior estimators and the PESLs; the moment estimators and the Maximum Likelihood Estimators (MLEs) are consistent estimators of the hyperparameters; the goodness-of-fit of the model to the simulated data. The numerical results indicate that the MLEs are better than the moment estimators when estimating the hyperparameters. Finally, we exploit the attendance data on 314 high school juniors from two urban high schools to illustrate our theoretical studies.