两种不同类型文化的起源     

汪国风 《山西师大学报(社会科学版)》2006,33(1):38-42

千姿百态的人类文化具有两种基本的类型———农耕型与游牧型。而两种不同类型的文化则主要源于两种不同类型的食物结构———以植物食物为主的植食结构和以动物食物为主的肉食结构———及其生产方式。归根结底,则源于植物与动物的不同特性。抓住了植物性和动物性的差异,便抓住了两种不同类型文化的根本;抓住了两种不同类型的文化,便抓住了文化比较的根本。  相似文献   

瓣结鱼的食谱及食性研究     

谢恩义  何学福 《怀化学院学报》1999,(2)

瓣结鱼为水中垂直取食的温和肉食性鱼类．从140尾鱼（体长9．57-44．2cm）肠内含物分析,其食谱以水生昆虫及其幼、稚虫为主,该类食物出现率为99．29％,其次为螺、蚌等软体动物,出现率为15％．摄食强度有明显的季节性变化,以春季的3、4月最高,分别为93．33％和70．33％,5－7月较低,其它月份较为稳定．冬季以及生殖群体在繁殖季节无停食现象．该鱼的肠长／体长为1．21(N＝341）,其视觉在摄食中起重要作用．  相似文献   

A study of prolonged jaundice screen in healthy term babies     

Mahendra Kumar Banakar  Anbu Subbarayan 《Indian journal of clinical biochemistry : IJCB》2008,23(3):286-289

Prolonged jaundice in most of the term babies is associated with breast milk but in some cases it can be a marker for a range of hepatobiliary, hematological, metabolic, endocrine, infectious and genetic disorders that are associated with significant mortality and morbidity if not diagnosed in time. A diagnosis of conjugated hyperbilirubinaemia warrants urgent investigation. Protocols for investigating prolonged jaundice screen vary in complexity and the yield from screen has not been assessed. In order to address these issues, we carried out a study on healthy term babies referred to our day unit with prolonged jaundice. Infants were examined by pediatrician and investigations done as per unit protocol. Prolonged jaundice screen was found to be helpful in excluding biliary atresia and to support the diagnosis of breast milk jaundice. Present study concluded that negative prolonged jaundice screen is reassuring in healthy term babies and further investigations are unwarranted unless otherwise specified.  相似文献   

上海3-6岁幼儿出生与喂养状况及体质的调查          下载免费PDF全文

熊毛弟  朱健中 《体育科研》2008,29(1):34-37

采用多年龄段整群随机抽样方法,系统了解掌握上海城郊区幼儿营养与健康体质状况、变化趋势,为制订相关的公共健康政策和发展规划提供可靠的信息和依据.研究发现上海市幼儿的出生体重和身长平均分别为3365g和50．2cm。性别差异显著（P〈0.01）,低出生体重儿和巨大儿出生比例以及早产率分别为1．9％、6．0％及10．4％;其中幼儿4个月内采用基本钝母乳喂养的占55．8%,郊区显著高于城区（P〈0.001）,不同喂养方式对幼儿身体形态发育有一定影响。上海幼儿的生长发育及健康状况良好,有较好的新生儿保健水平,但新生儿出生后喂养方式仍存在较多的不合理问题,母乳喂养率有降低的趋势,与需要实现的目标有进一步扩大的差距.  相似文献   

基于机器视觉的养殖鱼摄食行为识别方法          下载免费PDF全文

李济泽  位威  张凯凯 《福建工程学院学报》2022,(4):378-382

利用机器视觉系统获取养殖鱼摄食图像纹理特征来识别养殖鱼群的摄食行为。从养殖鱼摄食图像上直接提取能表征鱼群摄食行为的20维特征,通过归一化、PCA降维和支持向量机训练获得养殖鱼摄食行为识别模型,以实现对养殖鱼摄食行为的识别。结果表明,提出方法的平均精确度为92.3%、假负率7.34%、假正率4.15%,为指导养殖鱼智能投饵提供了参考。  相似文献   

动物饲养学实验教学改革的探讨     

宾石玉  邓建珍 《高教论坛》2007,(2):88-89

本文阐述了以培养学生的综合素质为目标,对动物饲养学实验性教学改革进行了初步探索。  相似文献   

The impact of gastrostomy feeding tubes on the early childhood education and care of young children     

Charlie Swan 《Support for Learning》2021,36(4):555-571

This article explores how gastrostomy feeding tubes can impact the early childhood education and care (ECEC) experiences of children. It presents findings from a small-scale study, which utilised the perspectives of early years educators and parents. The findings indicate that feeding tubes have both an opportunistic and restrictive impact within ECEC. Opportunity was evident through improved nutrition and health, which allowed familial respite and an increased attendance of ECEC. This enabled opportunities for social and explorative interactions. However, the complexities of having and supporting a feeding tube made accessing types of play and exploration challenging. Collaboration between the educators and parents was a crucial tool for success. Educators felt with experience and teamwork they could ensure the needs of children were met innovatively and safely. However, it was concluded clearer advice for attending ECEC settings with a feeding tube would benefit all involved and instil a sense of readiness.  相似文献   

发展蔗渣牛饲料的研究   总被引：1，自引：0，他引：1  

张远平 《广东轻工职业技术学院学报》2003,2(2):19-21

从我国畜牧业（特别是奶牛和肉牛）发展的基本情况出发，论述了我国发展蔗渣糖蜜饲料的必要性、重要性和可行性，并简要介绍了国外利用蔗渣糖蜜作饲料的情况及我国蔗渣糖蜜饲料的研究状况。  相似文献   

浅谈多工位级进模一二     

李钢 《科教文汇》2011,(15):80-80,92

对于加工形状复杂,相关尺寸要求高,且工序多的工件,选用多工位级进摸,可将各道工序有机地结合在一起,使其操作方便、效率提高,从而有效地降低生产成本和劳动强度,增加经济效益。  相似文献   

先天因素、后天因素与幼儿体质相关性研究     

张学兵  乔玉成 《辽宁体育科技》2014,(3):65-68

运用文献资料法、问卷调查法、数理统计法、访谈法等,对幼儿体质与先天因素、后天因素进行相关性分析,深入探索先天因素、后天因素与幼儿体质变化的关系,旨在为提高幼儿体质水平,以及更好地开展幼儿体质研究具有一定的现实和理论意义。  相似文献