分析民间修辞"民以食为天"

修辞,作为一种语言现象,不论是语词符号,还是表达方式、接受方式,都是在社会历史过程中生成、演化的,修辞活动关联着丰富的人文蕴涵。本文从广义修辞学的角度谈谈“民以食为天”的原始意义、文化意义、社会意义以及审美意义。     

风力发电机组旋转Fourier谱物理机制

基于常规的紊流风速功率谱很难准确预测风力发电机组的极值荷载与疲劳荷载。为准确预测风电机组作用荷载,在明确叶片旋转效应物理机制的基础上,推导了样本互相关函数与Fourier互谱之间的关系,进而提出了旋转Fourier风速谱模型。为全面把握旋转Fourier谱的物理本质,探索了影响旋转Fourier谱的主要参数（包括计算半径、叶片旋转速度、平均风速、地面粗糙度等）,并进行了相应的参数分析。研究表明,相比传统紊流风谱而言,旋转Fourier谱更具物理意义及工程价值。     

矿产节约与综合利用技术经济评价方法初探

加强矿产资源节约与综合利用是解决我国资源短缺的重要途径,是加快经济发展方式转变的必然要求,是促进矿山企业可持续发展的必由之路.开展矿产资源节约与综合利用技术经济评价有利于实现资源开发利用效益最大化,有利于提高示范基地建设水平.通过对某石灰石矿技术改造项目技术经济评价案例的分析,指出技术经济评价应为我国矿产资源综合勘查开采提供科学依据,为矿产资源节约与综合利用项目开展时序提供依据.     

小秦岭595~#石英脉地质特征研究

通过对小秦岭595#石英脉地质资料的综合分析研究,概括其地质特征为:主脉体严格受褶皱构造形态控制;主脉体形态为楔状;主脉体埋藏深属隐伏脉体。这些地质特征是特别重要的,是独一无二的。它是一种新类型,具有一定的找矿意义。     

东准噶尔贝勒库都克铝质A型花岗岩微量元素地球化学特征及地质意义

通过对新疆东准噶尔卡拉麦里地区贝勒库都克岩体的岩石地球化学特征的研究,结果表明,在贝勒库都克黑云母花岗岩中Rb、K和Th等大离子亲石元素明显富集,相对富集Zr、Hf等高场强元素,相对亏损Ba、Sr、Nb和Eu等元素,稀土元素含量相对较高,Eu的负异常极强,稀土元素配分模式呈平坦的“V”字型,属于典型的铝质A型花岗岩。该花岗岩在成因上属于A2型,形成于后碰撞的张性环境,其来源可能与洋壳和岛弧建造组成的年轻地壳有关。花岗岩微量元素构造判别图显示它是一种后碰撞花岗岩,标志卡拉麦里地区在晚石炭世造山作用的结束和板内构造演化的开始。该岩体锡质量分数普遍都比较高(15.50×10^-6),为锡的成矿物质来源和锡矿矿床学的深入探索提供重要参考。     

一种新的属性重要性度量及其规则获取

在分析规则知识条件和结论所在等价类包含关系基础上,提出了一个新的属性相对重要性的定义,并给出一种以决策类为基础的逐渐增加条件属性直接获取最简分类规则方法,同时用实例进行了验证。     

全球化的新挑战与科学发展观的世界意义

在全球化深入发展以及深层矛盾日益显现的大背景下,科学发展观的提出为建设一个更美好的全球社会指明了新的方向和思路。它不仅是中国的发展观,也是世界的发展观。科学发展观的世界意义在于：在积极参与全球化中彰显社会主义的价值追求;为广大发展中国家积极参与全球化提供成功范例;为实现全球善治提供理论创新以应对世界性难题;推动以资本主义为主导的全球化向以社会主义为主导的全球化转变。     

The significance of task significance: Job performance effects, relational mechanisms, and boundary conditions.

Does task significance increase job performance? Correlational designs and confounded manipulations have prevented researchers from assessing the causal impact of task significance on job performance. To address this gap, 3 field experiments examined the performance effects, relational mechanisms, and boundary conditions of task significance. In Experiment 1, fundraising callers who received a task significance intervention increased their levels of job performance relative to callers in 2 other conditions and to their own prior performance. In Experiment 2, task significance increased the job dedication and helping behavior of lifeguards, and these effects were mediated by increases in perceptions of social impact and social worth. In Experiment 3, conscientiousness and prosocial values moderated the effects of task significance on the performance of new fundraising callers. The results provide fresh insights into the effects, relational mechanisms, and boundary conditions of task significance, offering noteworthy implications for theory, research, and practice on job design, social information processing, and work motivation and performance. (PsycINFO Database Record (c) 2010 APA, all rights reserved)     

p53在胃肠肿瘤的表达及预后意义的研究

p53蛋白是反映细胞增殖活性的重要指标,与胃肠肿瘤的发生发展密切相关。结合病理形态学观察,检测p53蛋白的表达,能更客观、准确地判断胃肠肿瘤的恶性程度和预后。对胃肠肿瘤的诊断和预后有较高的临床实用价值。     

Mediation in experimental and nonexperimental studies: New procedures and recommendations.

Mediation is said to occur when a causal effect of some variable X on an outcome Y is explained by some intervening variable M. The authors recommend that with small to moderate samples, bootstrap methods (B. Efron & R. Tibshirani, 1993) be used to assess mediation. Bootstrap tests are powerful because they detect that the sampling distribution of the mediated effect is skewed away from 0. They argue that R. M. Baron and D. A. Kenny's (1986) recommendation of first testing the X → Y association for statistical significance should not be a requirement when there is a priori belief that the effect size is small or suppression is a possibility. Empirical examples and computer setups for bootstrap analyses are provided. (PsycINFO Database Record (c) 2010 APA, all rights reserved)