5 research outputs found

    仿鱼鳞微织构电极丝材料及其制备方法与应用

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    本发明涉及仿鱼鳞微织构电极丝材料及其制备方法与应用。具体地,本发明公开了一种电极丝材料,所述电极丝材料表面具有仿鱼鳞微织构层,且所述电极丝材料包括:i)作为内层的合金基体层;ii)作为中间层的互扩散层;和iii)作为外层的镀层;并且,所述电极丝材料对冷却液的接触角为105-150°。本发明还公开了所述电极丝材料的制备方法与应用。本发明的电极丝由于其特殊的表面仿生结构,可明显降低切割阻力,提高冷却速率,进而提高切割速率,有效改善电极丝的使用性能。所述制备方法具有工艺简单、易于工业化生产的特点

    煤巷锚杆支护施工装备现状及发展趋势

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    锚杆支护施工装备是煤巷锚杆支护成套技术的重要组成部分,直接影响锚杆支护速度与质量。经过长期发展,我国煤矿开发出多种形式的锚杆支护施工装备,包括单体锚杆钻机、锚杆钻车、掘锚机、掘锚一体机、锚杆转载机及跨骑式锚杆钻车等。系统分析了6类锚杆支护施工装备的发展历程、技术性能、技术参数、适用条件及最新进展。单体锚杆钻机轻便、灵活、技术成熟,形成系列化产品,得到广泛应用。机载锚杆钻臂可集成于不同平台,形成各种集成化施工装备:锚杆钻车形成了从两臂到九臂的多种机型,可紧跟掘进装备、与掘进装备交替作业,多臂协同、多臂平行作业完成锚杆支护施工;将机载锚杆钻臂配置于悬臂式掘进机上,开发出多种形式的掘锚机,实现了掘进与锚杆支护施工2个功能;掘锚一体机实现了国产化,研制出支护平台前移的掘锚一体机、护盾式掘锚一体机及钻锚一体化掘锚一体机;研制出从两臂到七臂的锚杆转载机、十臂跨骑式锚杆钻车,实现了锚杆支护与掘进、运输分区作业。介绍了钻锚一体化锚杆支护技术与装备,包括钻锚一体化锚杆、泵注锚固剂、钻锚一体化钻臂、钻箱、锚杆仓、锚固剂泵注系统及智能控制系统,将传统锚杆施工6道工序简化为1道连续工序,实现了“一键打锚杆”自动化作业,显著提高了锚杆支护速度和自动化程度。指出了煤巷锚杆支护施工装备发展趋势:数智化锚杆钻臂;锚杆钻臂定位、位姿自主调节及多钻臂协同控制技术;锚杆(索)结构与材料优化、锚注材料升级及施工设备完善;环境动态感知及随掘围岩稳定性判别;锚杆支护施工装备故障诊断技术;巷道围岩变形与支护体受力在线监测;建立大数据平台,实现锚杆支护自动化、智能化

    Does sleep intervention for elementary school students improve self-esteem?

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    小学生の睡眠習慣の改善が自尊感情の向上に影響を及ぼすかを明らかにするため睡眠介入研究を実施した。対象は沖縄県の公立小学校2 校の小学6 年生244 名(介入校149 名、対照校95 名)である。介入校には週1 回の睡眠の授業と毎日の睡眠日誌の記入及び検者によるフィードバックを1 か月間行った。介入の前後に睡眠習慣やその他の生活習慣や自尊感情及び抑うつの質問項目を盛り込んだ質問紙調査を2 度実施した。その結果、事前調査の横断的解析によって、小学生の自尊感情と関連する項目は、睡眠時間、睡眠の質、不眠症、睡眠の満足度、朝食摂取、運動時間であることが明らかとなった。睡眠介入前後の縦断的解析によって、睡眠習慣の改善および自尊感情の向上はみられなかった。しかしながら、抑うつにおいては睡眠介入後有意に改善傾向が見られた。To clarify whether improving sleep habits in elementary school students affects self-esteem, the authors conducted a sleep intervention study. The subjects were 244 sixth grade students (intervention school: 149, control school: 95) at two public elementary schools in Okinawa Prefecture. The intervention school provided weekly sleep lessons, completed daily sleep diaries, and provided weekly examiner’s feedback for one month. Twice questionnaire surveys were conducted before and after the intervention, which included questions about sleep habits, other lifestyles, selfesteem, and depression. As a result, a cross-sectional analysis of the first wave survey revealed that the items related to self-esteem of elementary school students were total sleep time, sleep quality, insomnia, sleep satisfaction, breakfast intake, and exercise duration. Longitudinal analysis before and after sleep intervention did not reveal any improvement in sleep habits or self-esteem. However, there was a significant improvement in depression after sleep intervention

    Study of psychological effect of unbalanced diet of infants : Through interventional study for improving unbalanced diet

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    偏食の改善が幼児の心理面の発達に影響を及ぼすかを明らかにするため、沖縄県の保育園2園の5 歳児とその保護者38 組(介入群26 組、対照群12 組)を対象に偏食改善の介入研究を行った。園児への食育の介入は、約1 か月間に亘り、読み聞かせ、食材体験、調理実習の3 回を行った。保護者には偏食改善に向けたお便りを児童に介入後配布した。介入前後に偏食、食習慣、心理的側面、健康状態などの項目からなる質問紙調査を保護者に2 回実施した。事前調査の横断的解析結果は、偏食と心理的変数には関連がみられず、保護者が食事に気を使うほど児童の情緒が安定し、不安や抑うつが少なく、攻撃性が低いことが明らかとなった。事前事後の縦断的解析結果は、食育の介入による心理面の影響はみられず、ファストフードを摂らないようにするという食行動の改善が有意にみられた。In order to clarify whether the improvement of unbalanced diet affects the psychological development of infants, the authors conducted an intervention study on the improvement of unbalanced diets among 5-year-old children and their parents (38 pairs in the intervention group, 12 pairs in the control group) at two nursery schools in Okinawa Prefecture. There are three dletary education interventions for children: reading a story, experiencing the ingredients, and cooking. Parents were given a letter for improve children’s diet, after the intervention. Before and after the intervention, parents participated two questionnaire surveys, including items such as unbalanced diet, eating habits, psychological aspects, and health status. The results of the cross-sectional analysis of the first wave survey showed that there was no association between unbalanced diet and psychological variables for infants, and that the more parents care about children’s diet, the more stable their emotions are, the less anxiety and depression they have, and the less aggressive they are. As a result of the longitudinal analysis before and after the study, there was no psychological effect due to the intervention of dietary education, and there was a significant improvement in eating behavior as not eating fast food
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