共查询到20条相似文献，搜索用时 312 毫秒
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本文通过对几种测定玉米水分方法的比较，将微波干燥测水技术用于单个或小批量玉米水分测定中，所得测定结果符合国标要求。 相似文献
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The minimum sizes of specimens that can get effective K_(10) values by 3-point bending, 4-point bending and CT methods are derived on the basis of their notch sensitivity laws and size effect equation of concrete. The results show that the minimum heights of 3-point bending and 4-point bending specimens are very similar to those from Modeer's results, and the minimum height of CT specimen increases as the relative crack length increases. 相似文献
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Generally,a second order spring-damper system is used to represent the model ofweighing sensor in checkweigher. It only represents one part of checkweigher.In this paper,accord-ing to the relationships of individual parts of checkweigher and main disturbance source,a model isproposed for whole checkweigher.It is proved by simulatlon that this model is in a good approxima-tion. 相似文献
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Zhang Shide 《保鲜与加工》1990,(3)
This paper studies several kinds of motion equations of nonlinear nonholonomic constraint systems. On the basis of the motion equations of the first order nonholonomic system and the theory of the zero factor of matrix multiplying from the left, the general equations of the system without undetermined multipliers is derived. By applying the method to arbitrary order nonholonomic systems, the motion equations of the systems are gained. 相似文献
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用异丙醇代替乙醚—乙醇混合溶剂测定植物油脂酸价的研究 总被引：3，自引：0，他引：3
用3种不同溶剂测定植物油脂的酸价,发现用异丙醇作溶剂所测结果与GB5530－85所规定的溶剂测得值非常接近。而异丙醇具有无毒性、安全性高等优点。建议用来取代乙醚—乙醇混合溶剂测定油脂酸价。 相似文献
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Xian Wu Dong Dawei Luo Dali 《保鲜与加工》1989,(1):45-50
The instantaneous center of the cross-spring pivot is studied in this paper. It is also pointed out in this paper that three different kinds of center(the static geometric center the moving geometric center and the instan-tanaous canter), exist when the cross-spring pivot is deflected. Their relationship is calculated, the variation character of the moving geometric center almost condcides with the curve of S.Hildebrand's experiments. 相似文献
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Qiou Xiande Zhuang Qiancheng Wu Gang Xiao Changfu 《保鲜与加工》1992,(3):134-140
The problems that the bump of coal and methame in the mine is contraled by the
stress of longwall and that the coal and methane bump in the mine is affected by the physical properties of the coal are analysed and discussed through some specific bump cases. It is shown that the compressive stress, the content of the methane of the coal, and the bump of coal and methane are directly affected by the content of the ash and the volatile of the coal. 相似文献
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This paper presents the general expressions of computer which include(1) calculation of the coefficient of normal equations;(2) calculation of the reduced coefficient;(3) calculation of[PVV];(4) calculation of the cor-relate;(5) calculation of the weight reciprocal(1/P_F)of the function of adju-sted value.Each calculation contains corresponding program of calculation.As a program block,it may be quoted at any time in the course of surveying computation. 相似文献
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小麦品种品质性状与农艺性状的配合力分析 总被引：18，自引：6，他引：12
本文对7个冬小麦亲本(3个品质亲本作母本,4个农艺亲本作父本)7个性状〔蛋白质含量、沉淀指数(Zeleny)、伯尔辛克指数(pelshenke)、千粒重、抽穗期、株高和收获指数〕按 p×q 交配模式作了一般配合力和特殊配合力分析。方差分析表明,除雄亲蛋白质的一般配合力和沉淀指数、千粒重和株高的特殊配合力外,大多数性状的一般配合力和 相似文献
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Xie Shangfen Shen Hui 《保鲜与加工》1991,(4):93-96
The electrochromism of polyaniline films, which is prepared by electropolymer-ization from aniline in acidic aqueous solution onto platinum,is investigated in 330-700nm through in-situ ellipsometric technique. The results indicate that the ellipsometric peak of the reduced state(-0. 2V) of the film appears at 390-400nm and the oxidized state(0. 55V) at 500-530nm. The elec-trochromic reaction from the reduced "yellow" state to the oxidized "green" state is suggested via intermediate state whose ellipsometric peak appears at 466-470nm. 相似文献
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桐籽饼去毒作饲料的研究 总被引：2，自引：0，他引：2
文章报导了将经去毒处理的桐饼粉,按不同比例添加于饲料中喂养肉鸡、蛋鸡、生长肥育猪,经筛选、小试、中试等规模试验的情况。结果表明：我国现行榨油工艺的机榨桐饼,经去毒处理后,可按10％比例加入肉鸡饲料,按5％比例加入蛋鸡饲料。按5％～7．5％加入肥育猪饲料中;各项生产性能及病理变化均与对照无明显差异．有的还优于对照,文章报导的去毒方法,较发酵法和化学处理法操作工艺简单,成本低,效果好． 相似文献
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Based on general concepts of microcomputer developmentsystem,the design concept and main characteristics of 1802 microcomputerdevelopment system are introduced in this paper.This system is ratio-nally designed,powerful in function and very useful for further develo-pment and application of 1802 host computer in communication. 相似文献