共查询到20条相似文献，搜索用时 109 毫秒
1.
刘爱琴 《洛阳师范学院学报》1998,(5)
本设计方案是采用单片微机8031，实现塑化厂集中供料系统的全自动控制，并可通过键盘更换配方，关闭机器料斗。还设有料仓低限报警、堵塞报警、数字显示料斗号、配方等功能。 相似文献
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针对传统焦化干熄焦装入装置易故障的特点,设计了利用将原装入料斗分为受料斗和布料斗两部分,受料斗及除尘设备进行固定,仅布料斗与台车相连,极大减轻了台车的驱动负荷,可缩小驱动电机,节省电能;并且固定的除尘设施亦可简化设备,提高除尘效果、节省投资、便于维修。具有一定的环保效益和推广价值。 相似文献
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赵建玲 《新课程学习(社会综合)》2009,(10)
通过重料斗闸门中电液推杆在弯管机中的再利用过程,朋友厂原55M3高炉槽下称重料斗闸门都是采用电液推杆,其为整体式结构,一旦出现液压缸磨损漏油就不能再使用,但其电机、液压泵、溢流阀等部分都可以再利用. 相似文献
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姜锐 《温州大学学报(社会科学版)》2001,14(4):72-74
针对TH斗式提升机在工作过程中出现的链轮磨损、驱动装置安装不便、料斗加工复杂、防尘密封困难、链条运动不同步等问题提出了相应的改进措施。 相似文献
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钻斗钻机的优点及其工程实践实例 总被引：1，自引：0，他引：1
赵梢春 《福建工程学院学报》2003,1(3):52-54
钻斗钻机具有孔内直接旋挖取土、快速穿越卵石土层和强风化岩层的功能，配上汽车潜孔锤和全套管跟进，可快速嵌入岩层。若同时采用优质泥浆护壁、气举反循环清渣、履带吊车一次吊放长钢筋笼和大料斗灌注桩身砼等工艺，则完全可实现优质、高速钻孔成桩。 相似文献
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鲁强 《辽宁科技学院学报》2008,10(3):28-29
文章对烧结机大料仓在窄口情况下如何解决排料顺畅问题进行研究。从安全性、料仓寿命、能源节约、维护方便等多方面考虑,通过理论计算对料仓下料斗进行改造及设计。解决了料仓排料困难的问题,为2号机改造大修提供了依据;同时,为与此类似料仓或斗的改造或设计提供了经验。 相似文献
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为实现高固体含量吸收药自动定量加料,以通用定量加料装置为研究对象,提出高固体含量吸收药的定量加料装置的安全性问题．通过对流量脉动动态定量关系的深入分析,根据脉动互补原理,提出了影响安全性问题的物料脉动现象的一种有效抑制方法;针对影响安全的物料打拱现象,提出了应用弹性料斗的设计思路;分析了装置在设计中应考虑的物料摩擦受力与物料摩擦感度的关系以及静电危害防范的参考标准、相应措施． 相似文献
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1 问题回顾及初析
由张大同编的《金牌之路竞赛辅导——高中物理》（2000年6月第2版）141页17题,在配套的《金牌之路竞赛解题指导——高中物理》中的解答笔者对此存在一些疑惑．原题为：如图1所示的传送机,传送速度v=1m／s,位于传送机底部的料斗每分钟向传送机输送2．4×10^3kg,的煤屑,传送机将煤屑送到h=4m高处,求传送机电功率P（不包括传送机空转时所需的电功率）． 相似文献
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周小亮 《初中生世界(初三物理版)》2003,(10)
春风———春天的使者，你饱含深情，悄悄地来到人间，轻快地奔跑着，送来了温暖的阳光，逗笑了冰冻的小河，唤醒了冬眠的小生灵，吹绿了大地，吹艳了各色的花。不信么，请看，田野上，一朵朵花开了，红红的、白白的、黄黄的……像赶趟子似的，姹紫嫣红，争奇斗艳。这时节，可把蜜蜂忙坏了：他呼朋引伴，欢快地歌唱，和彩蝶一起，在花丛中跳集体舞，这朵花上闻闻，那朵花上吻吻。孩子们更是欢天喜地，他们擎着各色各样的风筝，奔跑着，呼喊着，童心随着风筝飞上了蓝天。啊。春风，你不但吹绿了大地，而且吹暖了人们的心。春风$东台市廉贻二… 相似文献
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Two experiments were conducted to determine the conditions under which a shift problem vs. a stay problem would be easier for animals tested on Maier’s three-table task. When animals were given a prior exploratory experience and a partial feeding during the feeding experience, the stay problem was easier. With a prior exploratory experience and a complete feeding experience, the shift solution was easier. In the absence of prior exploration, rats cannot solve either the stay or shift problem, regardless of the amount of feeding during the feeding experience. 相似文献
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Feeding Imprinting: The Extreme Test Case of Premature Infants Born With Very Low Birth Weight 
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下载免费PDF全文 Feeding imprinting, considered a survival‐enabling process, is not well understood. Infants born very preterm, who first feed passively, are an effective model for studying feeding imprinting. Retrospective analysis of neonatal intensive care unit (NICU) records of 255 infants (Mgestational age = 29.98 ± 1.64) enabled exploring the notion that direct breastfeeding (DBF) during NICU stay leads to consumption of more mother's milk and earlier NICU discharge. Results showed that DBF before the first bottle feeding is related to shorter transition into oral feeding, a younger age of full oral feeding accomplishment and earlier discharge. Furthermore, the number of DBF meals before first bottle feeding predicts more maternal milk consumption and improved NICU outcomes. Improved performance in response to initial exposure to DBF at the age of budding feeding abilities supports a feeding imprinting hypothesis. 相似文献
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Restrepo S 《Educational broadcasting international》1981,14(1):30-34
The breast feeding campaign in Colombia is particularly aimed at pregnant and feeding mothers in both urban and rural areas. The objectives are to: 1) encourage breast feeding; 2) lengthen the period of breast feeding; 3) delay the introduction of other foods, and 4) discourage the use of bottle feeding. The pregnant and feeding mothers were reached through doctors, nurses, nutritionists and educational agents. Seminars were organized to train health sector personnel. Curricula of university courses were revised. Printed materials such as handbooks, flipcharts and promotional posters were used. Games such as "Breastfeeding Ladder" were played in health centers. The use of mass media (radio, television, and films) was found to be the most effective method. Promotional advertising was aired on TV and radio. Films were used in 2 ways: short 10-minute films were produced and slide projection was introduced preceding the main feature film. The slide shows informed the mothers of the advantages of breast feeding. Some legal reforms were also made as part of the campaign: the Ministry of Health passed a resolution encouraging breast feeding in all its medical centers; the use of milk substitutes was prohibited; and promotion and packaging of milk substitutes were regulated by a decree. The success of this campaign can be measured by the increase in requests for advice on breast feeding in medical centers; the organizing in hospitals of specific programs for the promotion of breast feeding, and the move by advertising agencies to start promoting simultaneously their products and maternal milk. 相似文献
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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
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Edward P. Sarafino 《Learning & behavior》1978,6(2):235-243
Twenty-four male rats were reared under three feeding conditions. These conditions manipulated the number and variety of exploratory behaviors required to obtain diets of powdered food and water in feeding boxes. One group performed minimal exploratory responses to obtain their diets. Another group shuttled between two feeding stations, thereby executing several exploratory components, primarily locomotor. The third group performed a considerable number and variety of exploratory components in search of their diets, located unsystematically throughout the feeding box. Adult testing occurred without food and water in an apparatus resembling the feeding boxes. The results showed that exploratory behavior was affected by feeding conditions, enhanced with increased dietary deprivation, and reduced across both trials and within-trial intervals. These results indicate that the particular exploratory behavior measured must be selected by reference to the subjects’ prior experience. 相似文献
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Feeding practices are important determinants of growth and development of children. Using infant and young child feeding indicators and complementary feeding guidelines, 7 practices in 28 countries are described, showing substantial variation across countries. Only 25% of 0- to 5-month-olds were exclusively breastfed, and only half of 6- to 8-month-olds received complementary foods the previous day. Median duration of breastfeeding and increase of fluid intake during diarrhea were low among countries with a high Human Development Index (HDI). Living in high-HDI countries may not translate to positive feeding practices. Across countries, there is a need for promotion, protection, and support of optimal breastfeeding and complementary feeding practices as well as better adherence to recommendations for feeding during illness. 相似文献
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重型脑损伤昏迷病人鼻饲并发症护理 总被引：1，自引：0，他引：1
常荷 《泰州职业技术学院学报》2010,10(1):44-46
目的探讨重型脑损伤昏迷病人鼻饲及常见并发症的护理要点。方法对113例重型脑损伤鼻饲患者采取一系列护理干预措施,减少并发症的发生。结果113例鼻饲患者中出现返流14例,误吸3例,腹泻28例,胃潴留13例,脱管9例,堵管4例。结论长期鼻饲过程中并发症虽然是难以完全避免的,但大部分并发症可以通过护患双方的共同干预而减少。 相似文献
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研制了一套药芯焊丝生产线电磁振动送粉机构及其单片机控制系统．通过对电磁振动送粉机构参数的测试，找到了送粉速度ＶＬ和电流Ｉ之间的数学表达式，使控制系统不仅可以根据带宽、药粉密度、轧丝速度和填充率自动计算出送粉量，而且可以根据轧丝速度调节送粉速度，使填充率保持稳定 相似文献