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关键词： 经济波动   国有经济投资   经济稳定  

摘要： 经济稳定、政治稳定与社会稳定共同构成了当代经济社会健康发展的前提条件。传统的宏观经济政策理论和各国的实践一般都把财政货币政策作为稳定宏观经济运行的主要工具,而在中国特色社会主义市场经济体制下,国有经济投资也发挥了一定作用。本文的研究发现:非国有经济投资具有明显的顺周期性,但国有经济投资的波动性较小,且具有一定逆周期性;分省层面的回归结果显示,国有经济投资比重高的省份,宏观经济波动较小;同时,国有经济投资对GDP具有显著的乘数效应。这些结果表明,国有经济投资发挥了稳定宏观经济作用,但这种稳定作用随着国有企业改革不断深化可能会有所减弱。

关键词： 急慢性白血病   血液分析仪   检验  

摘要： 目的分析血液分析仪在急慢性白血病检验中的应用价值。方法选取我院2017年4月-2018年4月收治的40例白血病患者,根据其类型分为急性白血病组和慢性白血病组,再抽取同时期40名健康志愿者为对照组。对所有研究对象采取血液分析仪进行检验,记录健康志愿者与白血病患者的白细胞计数指标、血红蛋白水平以及CRP水平,对比分析血液分析在白血病诊断中的作用效果。结果对照组健康志愿者的血红蛋白水平明显高于两组白血病患者,其白细胞计数以及CRP水平与两组白血病患者进行比较则相对较低,急性白血病和慢性白血病在这三项指标中也存在明显差异。结论对于急慢性白血病患者可以采用血液分析仪进行诊断,可以有效鉴别急、慢性白血病,具有良好的应用价值。

关键词： classification   gene set enrichment analysis   boosting   kernel method  

摘要： The analysis of cancer genomic data has long suffered "the curse of dimensionality." Sample sizes for most cancer genomic studies are a few hundreds at most while there are tens of thousands of genomic features studied. Various methods have been proposed to leverage prior biological knowledge, such as pathways, to more effectively analyze cancer genomic data. Most of the methods focus on testing marginal significance of the associations between pathways and clinical phenotypes. They can identify informative pathways but do not involve predictive modeling. In this article, we propose a Pathway-based Kernel Boosting (PKB) method for integrating gene pathway information for sample classification, where we use kernel functions calculated from each pathway as base learners and learn the weights through iterative optimization of the classification loss function. We apply PKB and several competing methods to three cancer studies with pathological and clinical information, including tumor grade, stage, tumor sites and metastasis status. Our results show that PKB outperforms other methods and identifies pathways relevant to the outcome variables.

关键词： galaxies: general   galaxies: spiral   galaxies: structure  

摘要： This paper is the third which examines galaxy morphology from the point of view of comprehensive de Vaucouleurs revised Hubble-Sandage (CVRHS) classification, a variation on the original de Vaucouleurs classification volume that accounts for finer details of galactic structure, including lenses, nuclear structures, embedded discs, boxy and discy components, and other features. The classification is applied to the AExtraction of the idealized forms of galaxies in images' (EFIGI) sample, a well-defined set of nearby galaxies which were previously examined by Baillard et al. and de Lapparent et al. The survey is focused on statistics of features, and brings attention to exceptional examples of some morphologies, such as skewed bars, blue bar ansae, bar-outer pseudo-ring misalignment, extremely elongated inner SB rings, outer rings and lenses, and other features that are likely relevant to galactic secular evolution and internal dynamics. The possibility of using these classifications as a training set for automated classification algorithms is also discussed.

关键词： Consumer-to-consumer interaction   Service environments   Excitement   Consumer citizenship behaviors   Golf events  

摘要： Scholarly interest in social interaction has led to a consensus that the desire to engage in a high level of interpersonal interactions with other consumers is one of the major motives for attending sporting events. While prior studies have focused on social interaction as a motivational factor, there is a lack of research that explores consumers' experience of interaction during sporting events. The purpose of the study is to identify and test antecedents and consequences of consumer-to-consumer (CCI) interaction in professional golf events. Using a systematic sampling method, a total of 281 golf attendees were surveyed from three Korean Ladies Professional Golf Association (KLPGA) events. Structural equation modeling was conducted, and the findings supported (a) the full mediating effects of excitement between sport service environments (i.e., other consumers' passion and aesthetic scenery) and consumer citizenship behaviors and (b) the partial mediating effects of CCI between excitement and consumer citizenship behaviors.

关键词： 粮食质量   监测检验   粮食安全保障体系  

摘要： 基于对粮食质量监测检验在粮食安全保障体系中地位和作用的研究,首先,阐述粮食质量检测基本内容。然后,分析粮食质量监测检验在粮食安全保障体系中的法律地位和行业地位。最后,给出粮食质量监测检验在粮食安全保障体系中,发挥着为国家法律法规提供技术支持、为依法管粮提供技术保障的重要作用。

关键词： 第三方检验检测机构   农产品质量安全   监管  

摘要： 农产品质量安全事关社会和谐稳定,社会各界极为关注。健全农产品质量安全检验检测体系、组织开展质量安全检验检测是当今各国加强农产品质量安全监管的普遍做法。

关键词： 购买意愿   网络口碑   感知价值   中介作用   调节作用  

摘要： 基于社会关系理论和S-O-R模型,从社会媒体视角深入的分析了网络口碑对消费者购买意愿的作用机制,并在此基础上考察感知价值的中介作用和网络口碑的调节作用。以收集的284份数据为样本,运用结构方程模型对所提假设进行实证检验。结果表明:陌生口碑对消费者感知价值和购买意愿都存在显著正向影响;感知价值在陌生口碑影响购买意愿的关系中起部分中介作用;熟人口碑正向显著地调节了感知价值对消费者购买意愿的影响。最后本文给出了所建模型在理论和实践方面的贡献及未来的研究方向。

关键词： 农作物种子   质量检验   项目   作用   管理  

摘要： 农作物的种子质量是决定作物生长发育质量的关键,只有在保障种子高质量的前提下,才可以更好地实现高产量,对此做好关于农作物种子质量检验工作显得非常重要。针对农作物种子质量检验的项目、作用及管理进行简要分析,希望可以为相关工作者提供一定指导帮助。

关键词： 检验分析   安全生产   作用  

摘要： 化工企业生产过程中涉及到一系列复杂的生产工艺环节,加之材料本身具有的化学性质,因此生产过程中存在着大量的安全风险。检验分析是保障化工安全生产的一个重要举措,只有严格落实检验分析程序,才能最大程度消除可能存在的安全隐患,并为生产过程提供技术保障。文章将深入分析检验分析在化工安全生产中发挥的重要作用,在此基础上探究提高检验分析水平的有效措施。