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Wang Dongyun 《保鲜与加工》1988,(1)
On the basis of outlining our present situation of city water supply and itsgeological map compilation,this paper suggests a new principle which should befollowed in the compiling work of city water supply hydrogeological maps and themain contents of compilation and the ways of expression as one of the map com-piliing plans to be discussed in this field. 相似文献
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稻谷仓壁材料摩擦系数的实验研究 总被引:1,自引:0,他引:1
利用土工合成材料综合测定仪测定了不同法向压应力(25 kPa、50 kPa、100kPa、150 kPa、200 kPa)下稻谷(水分含量为13.55%、15.14%、17.00%、19.19%w.b)与不同仓壁材料(不锈钢板、混凝土板、木板)的摩擦系数。结果表明:稻谷与不锈钢板摩擦系数较小,与混凝土板和木板的摩擦系数较大;随着法向压应力的增大,稻谷与各仓壁材料的摩擦系数均呈不同幅度的减小;随着水分的增大,稻谷与各仓壁材料的摩擦系数增大。根据实验结果,可拟合出摩擦系数与法向压应力、水分含量的关系方程。 相似文献
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Yang Juan Du Yuqun Zhang Qichao 《保鲜与加工》1991,(1):80-83
The surface quatities of fine iron oxide particles are studied. The pore distribution and surface a area are determined and calculated. The results show that the surface area is 290m/g, 830m/g and the middle-pore(20~50A )is the main part of the fine iron oxide particles prepared by the colloid chemical method. 相似文献
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吸水率是小麦和小麦粉品质的一项重要指标。通过对小麦面筋吸水率的测定过程进行研究(测定方法按GB/T5506.2-2008、GB/T5506.4-2008执行),分析测量结果不确定度的来源并进行评估,提出应用该方法不确定度的评定结果。 相似文献
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Yu Zhuoqun 《保鲜与加工》1993,(1)
The Chinese philosophical dialectical thought was in the period times of the early years. In which, the Ying and Yang was deeply influenced the Chinese culture. Architecture as a body of culture is expressed all round. According to pursure the nature environment of mountains and rivers, the architectural mass height is arranged up and down; the statics and movement is changed; the emotional is osmosed between them and they can incorporate each other. They reflect the nature, order, dynamic state, opening and incorporation of architecture themselves. This paper analyses the system of the Chinese architectural laws for develpment. 相似文献
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Zhong Jingxiao 《保鲜与加工》1989,(4)
This paper introduces the metod of optimal design of municipal water distribution,The main points are the theory,mathematical model,program frame figure and example in practice of the optimal method of hydraulics.The
program is applicable to the design and calculation of the pipe network in a city. It gives a simple and convenient calculation method for multiple-scheme design and scheme cmparison of water supply system. 相似文献
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选择了北京地区储藏小麦、稻谷和玉米3个粮种共5个仓,针对易出问题的粮堆表层,对温度、粮食水分、CO_2气体以及霉菌和害虫生长,开展为期1年的实仓跟踪监测试验,研究实际粮堆中温度、水分、CO_2浓度与虫霉危害的关系。研究结果表明,粮堆表层温度受环境影响较大,无法检测虫霉危害的发生。粮食自身呼吸不会导致开放式粮堆表层CO_2浓度明显升高。当CO_2浓度明显升高时,可以确定粮堆安全出现异常状况,可能出现霉菌或害虫生长,也可能是虫霉协同共生,需采取其它简单快速的检测方法加以区分确认,以便于后续采取措施。由于气体有扩散性,实际仓储过程中,CO_2浓度量值和变化幅度受霉菌或害虫生长速度以及仓房密闭性等多个因素的影响。 相似文献
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在山东区域内选择具有储粮代表性的小麦、玉米、稻谷储备仓,实施了不同水分含量的实仓试验,采集试验粮表层温度、水分、CO_2浓度和真菌孢子计数等数据,探索试验数据与安全储粮的相互关系。试验表明:山东区域的小麦、稻谷、玉米的储藏安全受粮堆温度、水分含量的制约,温度、水分越高储藏安全风险越大,粮食水分含量与反映粮食呼吸状况的CO_2浓度具有较显著的正相关。自然条件下,山东小麦、玉米、稻谷的安全储藏,其水分含量不应高于13.0%、14.0%和14.5%。 相似文献
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对现有房式仓进行局部改造,设计,安装了适当的装置构成既能进行粮堆膜下环流熏蒸,又能进行膜下通风降温降水的“二合一”系统。经实践证明系统设计合理,改造方便,操作简便,投资少,通风,熏蒸效果良好。 相似文献