0散文诗36-37I227F08353F;F083_53司舜;

上它,我更易混迹其中。没有上帝,谁会瞥见我内心的惊恐?0散文诗38-40I227F08353F;F083_53陈计会;36-38篱笆谷雨;简单的布防,原始的姿态风骨, 深深竖插在罪恶与善良纠缠不清     

生物统计学与流行病学卫生和生物医学专业人员入门（第三版）

本书是由美国Albert Einstein医学院流行病学和群体健康系流行病学室Sylvia Wassertheil Smoller教授编著的。第一版于1990年出版，第二版于1995年出版，现为第三版。本书的特点是根据流行病学和统计学的基本框架，使读者理解流行病学与生物统计学的基本原理，理解“为什么做”和“做什么？”学会“如何做、如何解释”。书中的内容都是临床试验和基础研究中最常用的、或是在文献中经常引用的。     

Positive Solutions of Four-order Dierence Equations with Two Point Boundary Value Problems

Positive solutions of fourth-order dierential equations withtwo point boundary value problems are investigatedin[4,6].Inthis paper we investigate a similar problemfor dierence equations.Wedenote byZthe set of all natural numbers.Fora,b∈Z,a相似文献   

The Analysis and Numerical Simulation of Dynamical Functions of the Transpiration Cooling Control System with Surface Ablation

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Constructing Projection Frequent Pattern Tree for Efficient Mining

Frequent Pattern mining plays an essential role in data mining. Most of the previous studies adopt an Apriori-like candidate set generation-and-test approach. However, candidate set generation is still costly, especially when there exist prolific patterns and/or long patterns.In this study, we introduce a novel frequent pattern growth (FP-growth) method, which is efficient and scalable for mining both long and short frequent patterns without candidate generation. And build a new projection frequent pattern tree (PFP-tree) algorithm on this study, which not only heirs all the advantages in the FP-growth method, but also avoids it's bottleneck in database size dependence when constructing the frequent pattern tree (FP-tree). Efficiency of mining is achieved by introducing the projection technique, which avoid serial scan each frequent item in the database, the cost is mainly related to the depth of the tree, namely the number of frequent items of the longest transaction in the database, not the sum of all     

Clinical Analysis of GPT Alteration of Constructors for Qinghai-Tibetan Railroad at Different Altitude Areas

1Introduction Inhighaltitudeareas,thekeyproblemwas hypoxia.Ininternalorgans,themostsensitiveparttohypoxiawasneuralcells,thesecondwas cardiacmuscle,thethirdwaslivercells.In recentyears,theeffectofhypoxicenvironmenton liverhadgraduallybeenbecomingoneofthe importantresearchsubjectsonhighaltitudemedicine.Accordingtoreferences,inhypoxic environment,thestructureofliverissueand enzymeactivityhadchangedforexperimental animalsindifferentaltitude.Butforpeoplein differentaltitudeandindifferentmigrationp…     

东北大学学报(自然科学版)第23卷(2002年)总目次

第 1期 (总第 1 36期 )信息与控制基于多模型切换的多变量直接自适应控制器王　昕 ,岳　恒 ,柴天佑 ( 1)……………………………………………………一类转库问题流向优化问题的模型与解法高　天 ,王梦光 ,唐立新 ,宋建海 ( 5)……………………………………………钢铁企业产成品发货装船调度的模型与算法宋健海 ,刘士新 ,王梦光 ,唐立新 ( 8)…………………………………………支持复杂应用的工作流并发控制机制宋宝燕 ,于　戈 ,葛　薇 ,王国仁 ( 12 )…………………………………………………基于随机进程代数的软件体系结构建模与性能评价赵…     

NH3-H2O喷射-吸收复合式燃气热水炉系统研究及分析

本文利用喷射器的工作原理构造出具有更高效率的喷射 吸收复合式燃气热水炉系统,选定氨水溶液为工质,建立了所设计系统的物理模型和数学模型,在选定系统合理匹配参数的基础上,计算了各换热器所交换热量的占比。结果表明,高温换热器吸收的烟气热量最多,其吸收的热量约占总换热量的40%以上;而低温换热器吸收的热量最少,一般不超过总换热量的25%。所设计系统在冬季效率也可达到110%以上,而夏季时效率更是可高达120%以上,可真正实现高效节能。     

丁醇-汽油混合燃料应用于汽油机的性能实验研究

本文对不同比例的丁醇 汽油混合燃料在气道电控喷射汽油机台架上进行了性能实验研究。在转速为2 000 r/min和2 500 r/min时,将分别添加体积分数10%、20%丁醇的混合汽油与纯汽油进行了对比。研究结果表明,掺混丁醇后,发动机动力性略有下降,有效燃油消耗率略有增加,在90 N·m时比油耗取得最低值,在实验工况下HC和NOx排放略有下降,对CO影响较小。