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回复于
化学
内容:长得像三极管一样的元件可以是IC,也可以是温度传感器 用万用表测二极管正反向都不通,可以不是坏的,比如10KV或耐压更高的二极管,要用摇表测 隔壁班一同学做的单片机板不工作,仿真没问题,指示灯亮度不稳定,不断循环液体,等几个小时后就镀好了,课本上说这个操作会产生AgN3,会zha,但是我从来没遇到过会zha,我做过,不同浓度不同电流试了很多次终于成功,但是表面容易氧化变黑,坑爹啊 高中课本还扬言,金是很稳定的金属
磁流体显示屏
黑体辐射
1年6个月前
发表于
电子技术
极客DIY
动手实践: 实验报导
内容:它是由直径为纳米(10nm以下)的磁性固体颗粒,基础载体和界面活性剂组成的稳定的胶体液体。,为了保证系统能够长时间的稳定运行需要在电磁铁外围加上散热模块,在电磁铁周围加上导热硅胶以及导热金属片辅助散热。,并在外部粘贴散热片,等704硅胶凝固后整体结构相当
稳定。
DMSO有毒么?
yy+sy
15年9个月前
回复于
化学
内容:性质稳定,长时间在沸点温度下加热微量分解在碱性状态下可抑制腐蚀或分解。
无线供电电路制作与探讨
两壶居士
12年2个月前
发表于
电气电工
内容:之间的距离拉开后功率和效率都会有些变化),只是还有点美中不足的是:L2和L1之间的距离对U2的影响极大,有时两者间的距离只稍须变动了一点点(不到1毫米),U2就从12V左右一下子跌到6~7V,也就是说U2的稳定性还有待提高,不过,稳定地输出11V左右的电压是不成问题的。,谐振电容一定要用质量好的,要求电容器量稳定,耐压大于Vcc2的3倍以上。
围海储电的设想
sol81
12年10个月前
回复于
极客DIY
内容:甚至围堰本身有600平方千米的土地,有稳定和巨大的经济收入,直接连通烟台沧州秦皇岛大连的交通优势,本身可以成为一个新的行政单位,比如在上面建一个渤海直辖市之类。
EAST
作只海东青
2年9个月前
发表于
核技术与核仪器
严肃内容: 专业科普
内容:年底完成总装; 2006年2月工程调试成功; 2006年9月26日,EAST成功获得等离子体; 2007年1月23日,EAST成功获得聚变堆位形等离子体; 2009年,EAST成功获得稳定重复的,2012年,EAST成功获得超过400秒的两千万度高参数偏滤器等离子体;获得稳定重复超过30秒的高约束等离子体放电。
单片机
leolz002
10年8个月前
回复于
仪器仪表
内容:氧传感器实时检测发动机排气中氧气的含量,以动态反馈修正喷油量,使混合气浓度始终处于理论当量比,保证发动机燃烧性能;自学习功能可以保证发动机即使在不能闭环控制(例如起动后的几分钟内,氧传感器温度不够)时,混合气浓度也处于最佳稳定状态,这个排气泡系统保证了FAI喷射单元在高温大负荷工况的工作稳定,也保证了摩托车的热车再起动性能。,另外ECU程序中还包含了磨合程序以及发动机运行时间修正,保证了发动机的长期稳定性。,闭环系统不仅为催化剂转换器的高效长寿命工作提供了保障,而且可以更为准确、实时让ECU自学习发动机及电喷系统的变化,保证发动机长期稳定工作,另外也使车辆的一致性得到可靠保障。
开启业余卫星通信之旅:它比你想象中更简单
科创喵
3年10个月前
回复于
无线电
内容:JAS-2成功进入轨道后不久,JARL申请了一个OSCAR编号FO-29,其搭载一个反线性器和分组无线电转发器,还包含使卫星稳定在与轨道平面垂直预定姿态的磁转矩系统。,FO-29除了稳定系统还有其他许多电子方面的改进。
地震谣言及其平息对策剖析
1211
18年7个月前
发表于
地理与地质
内容:地震谣言对社会稳定和经济发展起到制约作用,一场范围较大的地震谣言其危害性是相当大的,所造成的损失往往不亚于一次中等强度的地震灾害。,如果对地震谣言的认识不足,识别不力,就会对稳定社会发展经济带来极大影响。,积极协助地震部门开展工作,发生谣传时尽快消除影响,平息谣言,维护当地社会稳定、经济
稳定。
业余火箭活动的基本矛盾是什么?
novakon
9年11个月前
发表于
喷气推进
内容:因此,是不是可以得出结论:业余火箭活动的基本矛盾,是小明对易燃易爆化学品的追求,与祖国对社会和谐稳定的追求之间的矛盾?
【试车成功】全新横向试车台设计及36标准机试车
飞鹰航天
1年11个月前
发表于
喷气推进
动手实践: 实验报导
内容:试车台是火箭动力试验的重要组成部分,试车台的设计与制造不仅影响推力数据的测量精度,更决定着火箭能否稳定燃烧。
关于火箭壳体材料的研究
ksama
13年6个月前
回复于
喷气推进
内容:特点:力学性能,电性能优良,耐酸碱力极强,化学稳定性好,但软化点低.
微小电容测量电路研究系列
Leonard
5年0个月前
回复于
电子技术
仪器仪表
内容:这还不算中美贸易摩擦的影响,我买这个芯片可找了好几家淘宝店,从香港进来的,货源不是那么稳定的,最后找到一个有库存的。
不用子弹的空气枪
laodayu
8年9个月前
回复于
极客DIY
内容:就用了一个大约洗衣机大小(具体多大不要计较)的机器,有炮管,那个东西解说叫“空气炮”,那个东西解说叫“空气炮”,那个东西解说叫“空气炮”,用空气炮对有可能即将发生雪崩的雪山发射空气炮,人为制造雪崩,雪崩过后雪山就比较稳定
我国氢氧液体火箭成功试车!!!
【四方】
9年9个月前
发表于
喷气推进
内容:点火后,火箭芯一级各系统工作稳定,发动机按照预定程序正常关机,达到预期目的。
使用PlutoSDR接收GK-2A气象卫星的云图
该用户不需要名字
2年10个月前
发表于
无线电
极客DIY
动手实践: 实验报导,严肃内容: 教程/课程
内容:目前不知道是不是由于干扰导致数字锁相环不稳定,还是什么其他原因,可能需要深入探索。
开一个人脑潜能开发帖
Gdeestan
1年4个月前
回复于
巫术与玄学
内容:最后总结一下:在平时及睡前应用梦屏,可以培养梦屏知梦扳机;在梦中应用梦屏,可以稳定梦境,转换梦境,施展众多强大神通;在梦醒时分应用梦屏,可以训练知梦反应能力,降低知梦点。
我国人口政策的历史反思与选择
杨小帆
6年4个月前
发表于
经济学
内容:从二十世纪九十年代初开始,中国的生育率水平一直低于保证人口规模在长时间内稳定的更替水平。,过去20多年里,日本经济长期低迷、国内需求不振、物价保持稳定,人口开始陷入负增长。 ,从1995年开始,中国经济结束高速通胀,第一次地产泡沫破灭,特别是亚洲金融危机后,大宗商品价格回落,煤炭钢铁过剩,出现大规模下岗潮,银行坏账问题显现,经济走入通缩,物价长期
稳定。
,韩国1962年推广小家庭鼓励少生来抑制生育,到1996年试图将生育率稳定至替代水平,抑制政策持续34年;9年后的2005年大力鼓励生育。,要达到这个目标,就应该保持每年出生人口的大致稳定,并最终使生育率维持到更替水平附近,这样下一代人口与上一代人口才能基本保持均衡。
新版感应加热驱动电路实测
坚持and突破
12年4个月前
回复于
电子技术
内容:如何保证工作的稳定性?
【转】新型微波炉电源中ZVS高频变换器的设计及实现
冰虹
12年0个月前
发表于
EMP和强微波
内容:启动磁控管需要一定的预热时间,其启动电压要远大于门槛电压,需要5 000V以上,磁控管工作以后,电压会下降成为一定值,这个值要求比门槛电压要高,以保证磁控管的稳定运行。 ,当磁控管开启后,电压下降至4 600V,并保持
稳定。
(转)火箭发动机技术狂想
香皂火箭q
12年5个月前
发表于
喷气推进
内容:但是有高中化学知识的人,都能看出这些东西都是集剧毒、强腐蚀、不稳定于一身的威猛药品,而且价格比传统燃料高出2个数量级,反应产物也大多剧毒,是无论如何也难以实际应用的,除非愿意将发射场做成一次性的。,大推力发动机稳定燃烧是世界级难题,美国人为了解决容易得多的F-1不稳定燃烧问题,花费了巨大的时间和精力财力,苏联人就没能解决大推力发动机不稳定燃烧问题,以至于其至今搞不出大单室发动机。,但是,两级型的火箭,使用的发动机数量较少,结构简单,可靠性和稳定性高,而“质子号”火箭有四级,总共有12台发动机,这可能是“质子号”火箭初期发射总是失败的原因,但是经过40多年的改进,稳定性和可靠性不断提高
【图纸开放下载】LRE5000液体火箭发动机参考设计
卷土而来
9年8个月前
回复于
喷气推进
内容:乍一看似乎此种负反馈能自动稳定燃烧室压力,可以近似认为是比例P控制模型。
调查:有多少人需要Gaussian09W+GaussView5.0量子化学计算软件?
博丽灵梦
10年8个月前
发表于
化学
内容:当基组增大时,这能给出稳定的布居。,⑵用四点差分而不是默认的两点差分计算数值频率,具有更高的精度和数值稳定性。
业余火箭安全标准(草案)
leeqingyang
12年1个月前
发表于
喷气推进
内容:难以控制压药力度,颗粒大小所带来的影响)等,不能通过设计预估到后果的燃料 Ⅲ类:属于低危险性燃料,主要包括具有成熟工艺或在制造过程中不受外界环境干扰或受干扰后对其产品影响很小,存在大量实验数据及文献佐证其安全性,稳定性的燃料,以在传统RNX燃料中添加二茂铁作为催化剂的实验,必须在制造前做好二茂铁与粘合剂,二茂铁与固化剂,二茂铁与添加剂,二茂铁与氧化剂等单相混合实验,期间需要考核混合后物的自身稳定性,高温稳定性等实验以验证在混合后不会导致剧烈的催化分解,8.燃料制造后,必须在试车前进行诸项稳定性实验(光稳定性,高温稳定性,撞击稳定性等),并进行燃料棒开放点燃实验,通过燃烧速度来评估药柱质地的均一性,对于在开放燃烧实验中出现剧烈燃烧变化的燃料棒,严禁进行发动机装机测试
申请科创风行动(科创A基金)用于四轴航拍机的DIY
闪电侠007
10年6个月前
回复于
科创基金
内容:③在飞机调试过程中拍好航拍设备,买好Arduino,待飞机稳定后,航拍设备也就到手,包括云台的 DIY配件。
自制大功率无线数传电台(原创)
ehco
17年7个月前
回复于
电子技术
内容:的输出管MRF464还是老化,额定40W的管子连1.8W都出不来……当然用高频电压表测得31V,虽然说的是1972标准输出15W,但大哥可以亲自一试1971标称输出7.5W我都试过,工作在极限状态下虽不稳定
低压,高效,高保真推挽电路!【原创】
立棍
10年7个月前
回复于
电子技术
内容:稳定性效率都在可接受范围。
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