共查询到20条相似文献,搜索用时 125 毫秒
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随着我国国民经济的不断进步,建筑行业得到了飞速发展,在促进我国社会进步与发展中发挥了至关重要的作用,对我国城市建设具有重要的现实意义。建筑物沉降观测作为建筑工程项目实施中一个重要的组成部分,是建筑工程质量好坏的关键所在。目前,对于建筑物沉降观测的研究日益增多,使其成为了我国建筑工程项目施工研究中的重要课题。本文将对沉降观测仪器设备、实施程序与步骤进行分析,对提高建筑物沉降观测精度方法进行深入探究。 相似文献
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从草地水土流失监测点的建设及观测的具体操作出发,在实际观测的基础上,对如何建立监测点,提高监测工作质量和监测数据的科学性、准确性,阐述合理建设水土流失监测点和正确进行观测的见解和经验。 相似文献
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在采煤工作面初次放顶期间,通过对各类顶板矿压活动规律的观测,确定初次放顶的各项参数及计算方法。以指导初次放顶工作。采用统计学的方法进行了矿压分析和总结,根据初次放顶顶板情况进行了合理分类。并对矿压观测站的建立、矿压观测和压力显现情况提出了指导性的管理措施。对初次放顶的管理工作提出了具体的技术管理措施,并取得了明显的效果。 相似文献
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食草动物食性研究的主要方法及其评价 总被引:5,自引:0,他引:5
本文对国内外常用的食草动物食性研究方法进行了分析与比较。常见的研究方法主要包括胃分析法、室内饲喂法、粪便显微组织学分析法、直接观察法和利用法。粪便显微分析法分析结果较为精确,并且易于取样,相比较更适用于我国食草动物的食性研究。胃分析法要求研究者必须杀死动物,利用法精确性较差,而观察法多受研究条件的限制, 因此这3种方法多用于食物组成的定性描述,或是作为其它研究方法的补充。 相似文献
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Morphologic changes of corneal epithelium after third eyelid removal were observed in six normal Beagle dogs. The observation was conducted on the 17th, 35th and 72nd week after the removal. Morphologic changes were observed on corneal epithelium layers at 17 and 35 weeks post excision of the third eyelid but they were limited to minor changes including abnormal intercellular adhesion and further exfoliation of superficial cells at 72 weeks. The reduced BUT and evidence of vital positive staining correspond with these morphologic changes. Therefore, these changes are thought to be important findings from a morphologic view point in identifying pathologic symptoms of the cornea using clinical evaluation methods such as BUT and vital staining method. Grossly, no clinical indication of ocular disease was indicated by slit-lamp biomicroscopic observation; however, the BUT shortage and positive finding of vital staining indicated that the corneal epithelium layers after third eyelid removal lacked the essential barrier function. Thus, it would seem appropriate to consider that such a condition of the ocular surface would worsen with excessive exposure of the ocular surface, palpebration disorders and other exogenous factors. 相似文献
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Megaesophagus in two cats 总被引:1,自引:0,他引:1
M Hoenig M B Mahaffey P G Parnell M E Styles 《Journal of the American Veterinary Medical Association》1990,196(5):763-765
Megaesophagus was diagnosed in 2 cats. Both had a history of regurgitation, and one was dyspneic. Radiography of the thorax and abdomen revealed generalized megaesophagus and gastric distention with gas. There was no esophageal motility during fluoroscopic observation. The prognosis for cats with megaesophagus is guarded. Although they may be satisfactory pets, cats with this condition should not be used for breeding because the condition is believed to be inherited through recessive genes. 相似文献
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3种冷季型草坪草混播配方优化组合筛选试验 总被引:3,自引:0,他引:3
在河西走廊中部地区气候条件下,通过对草地早熟禾Poa pratensis、高羊茅Festuca arundinacea、多年生黑麦草Lolium perenne3种冷季型草坪草18种混播配方进行了成坪品质的观察测定,筛选出了适应当地气候条件的优化组合配方10个。 相似文献
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母猪子宫内膜炎的病原分离及药敏试验 总被引:2,自引:0,他引:2
为了解和掌握吉林农业科技学院猪场猪子宫内膜炎的情况,取母猪的子宫内容物分别采用显微镜观察法、鉴别培养法和生化试验方法,鉴定出有葡萄球菌、沙门氏菌、大肠杆菌、链球菌这四种细菌,并将鉴定出来的细菌做药敏试验。结果显示葡萄球菌和链球菌对左氧氟沙星、米诺环素、复方新诺明敏感,对链霉素中度敏感,对青霉素、苯唑青霉素、阿米卡星、头孢噻肟钠耐药;沙门氏菌对左氧氟沙星、米诺环素、复方新诺明、头孢噻肟钠敏感,对链霉素、阿米卡星中度敏感,对青霉素、苯唑青霉素产生耐药性;大肠杆菌对左氧氟沙星、米诺环素、复方新诺明、阿米卡星、头孢塞肟钠敏感,对链霉素中度敏感,对青霉素、苯唑青霉素耐药;中药复方制剂对体外抑菌试验有效果。 相似文献
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Estimates of branched chain amino acid concentrations in plasma and, or, serum, urine, cerebrospinal fluid, formalin-fixed cerebral tissue and the associated formalin, provided evidence for a diagnosis of branched chain keto acid decarboxylase deficiency in five polled Hereford calves. The similarity of the clinical signs of dullness, recumbency and opisthotonos, and the observation of severe status spongiosus within the central nervous system, indicated that this condition had probably affected seven other newborn calves. It is suggested that this condition is analogous to branched chain keto acid decarboxylase deficiency or maple syrup urine disease of children. 相似文献
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内蒙古通辽市年一次暴雨及冰雹天气过程分析 《畜牧与饲料科学》2016,37(12):58-58
利用高空和地面实况、物理量场及雷达资料,对内蒙古通辽市2016年7月28日的暴雨和冰雹天气过程进行了分析,结果表明,该次暴雨和冰雹天气过程是由高空槽、低空急流及地面辐合线共同影响造成的。同时发现,大气层结稳定度、水汽条件、动力条件是造成该次暴雨和冰雹天气发生的主要条件,另外,雷达产品对该次暴雨和冰雹天气预报也有较好的指示意义。 相似文献