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拆机鉴赏
内容:引用 hambaby:热设计,没有3801A的那个Pro 也有双炉(即两级温控)的,稳定性指标为1pps.......
开关电源稳压问题
着迷者1
12年4个月前
发表于
电气电工
内容:现在的问题是只能稳压一组电压,当用400V取样时可以得到400V的稳定电压,但别的两组电压不稳定,请问各位大神有没有好的方法可以让每组电压都稳定,开关电源用SG3525电源模块,变压器初级5+5,次级150
Re:回 138楼(紫叶雪竹) 的帖子
紫叶雪竹
13年0个月前
回复于
电动汽车
内容:引用第139楼power_rdx于2012-01-16 20:34发表的 回 138楼(紫叶雪竹) 的帖子 :增强稳定性很简单,我有个自编的700C大刀圈前轮,光是一个轮圈就有1公斤多,稳定性非一般的强,而700C轮径比26寸山地大,装在山地车架上会增加轨迹量,进一步提升龙头的稳定性。,不是这个意思,重了,虽然能稳定,但是还不够,而且重了,耗能也增加了,速度还是不要太快好,危险啊,摩托破百,也发飘
[出售] 简易旋转摇床
zjsx8192
1个月2天前
回复于
跳蚤市场
晶体养成所
内容:这个稳定吗?
中国古代的学校开设数学课程吗?
Gdeestan
10个月20天前
回复于
历史与考古
内容:允许工匠官的似乎也只有元朝令某些人意外的是,中原有名的数学家多在“不稳定”的时代出现如祖冲之(南北朝)、刘徽(魏晋)、李治(金元)、杨辉(南宋)、赵爽(三国)、祖暅(南北朝)、朱世杰(元) 在北宋、清等,"相对稳定”的时代,也有一些数学家,但少,也不出名。
探天一号火箭事故分析
沉默彩虹
3个月11天前
回复于空间文章
探天一号火箭事故分析
内容:完成气动和重心设计后在open rocket里看一下稳定性是否在1.5~2,如果不是就改气动或重心,不然难以保证稳定飞行。
拆松下大型收音机
铅球脑袋
6年1个月前
回复于
电子技术
拆机鉴赏
无线电
内容:之所以这么复杂,完全是为了提高本震的稳定性。,因为LC振荡器在较高频率时,稳定性很差。
东亚DSM-8541四通道超级大电阻/超微电流计拆解
metellan
10年2个月前
回复于
仪器仪表
拆机鉴赏
内容:干簧继电器的信号通道与线圈隔离度更好,管子采用全玻璃结构充氮,接触电阻小而稳定并有足够的分断距离。
制备高氯酸铵
零产率人
1年11个月前
回复于空间文章
制备高氯酸铵
内容:一般不是球ap他不稳定,球ap相对于直接制备出来的ap稳定一些,丙酮的话可以用硫酸溶解三氧化铬然后氧化异丙醇,蒸馏出来产物就是丙酮,副产物是硫酸铬
矢量喷口发动机+遥测地面站测试
无
2年1个月前
发表于
喷气推进
航天技术
动手实践: 实验报导
内容:填装KNSB燃料,药柱长度230,直径34自稳定矢量视频地面站信号接收测试视频信号覆盖距离五公里左右,可以同时对姿态和位置信息实时传输处理
Applent AT825 10KHZ电桥,拆解,非高清无码大图
猎鹰
11年2个月前
发表于
仪器仪表
拆机鉴赏
内容:根据日本人的规则,先脱掉衣服拍几张大图然后再拍某些私处~~~~~~~~ 第一步扒掉外衣 铝片应该是电磁屏蔽罩 唯一感觉设计不当的就是这块电阻式触摸屏,固定有些不稳定
如何获得Visual Studio 2017预览通道版本
acmilan
7年8个月前
发表于
软件综合
内容:Visual Studio 2017目前分为稳定通道、预览通道两个通道。,官网上下载的一般是稳定通道,预览通道藏得很深。,截至目前可用的链接: XXXXXXXXXXXXXXXXXXXXXXXXXXXX/vs/preview/ 目前可用的Visual Studio 2017预览通道在线安装器(2017/4/11): 如果还需要稳定通道
230g 长续航共轴无人机
3DA502
4年10个月前
回复于
航空技术
极客DIY
内容:儿童迷你感应飞行器无人机男孩能飞的小玩具飞机耐摔悬浮直升机这东西sprite整这么复杂都做不成,简单的倾斜盘也不会好多少,工业界没有低垂的果实4轴用电子手段解决气动不稳定换来运动灵活性,共轴本身气动稳定
斑竹同志 能介绍一下卤素含氧酸吗
yy+sy
16年0个月前
回复于
化学
内容:氟:无氯:次氯酸HClO(冷稀溶液稳定),亚氯酸HClO2(极不稳定),氯酸HClO3(温度和浓度在40以下稳定)高氯酸(稳定,挥发性液体)溴:次溴酸HBrO(冷稀溶液稳定),溴酸HBrO3(和氯酸差不多,,氧化性在卤酸中最强),高溴酸HBrO4(氧化性极强,难制,稳定,固体)碘:次碘酸HIO(冷稀溶液稳定,两性,碱性大于酸性),碘酸HIO3(稳定,固体),高碘酸H5IO6(稳定,固体)
脉冲氙灯恒流
maxiaoyan-fa
6年4个月前
发表于
电气电工
内容:脉冲恒流第二个版本氙灯恒流稳定功率部分,CF部分模块设计,MCU控制以及通信进一步
稳定。
DIY 了个简单装置帮助提高晶体生长效率
古法造轮
1年9个月前
回复于
晶体养成所
内容:长晶体需要系统长期稳定,至少几十到几百小时的温度稳定性。,要确定系统是否能稳定在 0.1 度以内传感器分辨率要 0.02 度,之前搜过一些这个级别的测温记录仪,最便宜要 1000+ 😅 而且这只是温度传感部分,控制器部分得更贵。。。
发动机开关机时序,数据采集控制系统介绍
warmonkey
4年7个月前
回复于
喷气推进
航天技术
内容:考虑用plc吧,二手plc配各种变送器采集器稳定好用。
8位半万用表大比拼
mass_lynnxy
15年9个月前
发表于
仪器仪表
内容:在长期稳定性上比8508A稍差,但在短期稳定性,线性度,噪音以及转移特性方面都有最好表现,并提供了极其丰富的数学功能。,3、稳定性(可重复性)我们知道,万用表读数的不稳定性不仅取决于信号源的不稳定性(A),而且取决于万用表自身的不稳定性(B),合成不稳定性的计算方法,是A和B取平方和,再开方,与合成不确定度的计算方法一样,因此,只要读数稳定,就证明信号源和万用表自身都稳定性。,更具体的说,万用表自身的不稳定性不大于其(对任何信号源测量时)读数的不稳定性。,事实上7V内部基准是非常稳定的,但分压电阻就很难稳定,比如标价3万多的Fluke标准电阻742A-10k,其年稳定性才4ppm,那么732A/B内部采用的电阻不太可能超过独立的电阻基准,或者说电阻器件稳定到
梦戴维角膜塑形镜治疗近视的可行性讨论
splmonster
3年8个月前
回复于
医学
内容:我小学时一年稳定70度,上初中了带它,三年长了50度,而且期间身高长了40cm,主要是效果不稳定,一天好、一天不好
KC9531取样峰值射频功率传感器
kcma
5年5个月前
发表于
仪器仪表
无线电
内容:KC9531是取样峰值功率计,适用于稳定或缓慢变化信号的测量,不适合快速变化的信号或脉冲信号测量,对于不稳定信号,请选用KC9531B。,14000MHz功率范围(注1)-5010dBm检波方式取样(峰值、平均、RMS)最小脉冲宽度100μs峰值检波不确定度100~3500MHz,25℃,-40~0dBm0.2dB在已知频率校正后1.5dB长期稳定度,如果需要检测不稳定的功率信号,应使用KC9531B真有效值功率传感器,或使用KC9532四通道同步采样功率计。
【求助】关于火箭的尾翼设计
chemistry02
7年11个月前
发表于
喷气推进
内容:,合理选取具有高升阻比、能产生所需的稳定力矩的稳定翼面。”,而这种满足模型火箭正常飞行所必须的最小气动稳定性,又称为安全稳定性。 ,然而,偶尔也会有意外的情况发生,一些原本不稳定的模型火箭,在消耗掉一部分燃料后,其重心位置会前移,而导致其压力中心与重心的相对位置发生本质性的变化,在经过连续几个翻滚过后,在随机位置和状态下,模型火箭由不稳定转变为稳定,因此,发射不稳定的模型火箭是非常危险的,必须完全禁止。”,然后我在OpenRocket上改尾翼的数据(我的火箭直径定为44mm,所以直角梯形(或直角三角形)稳定翼的高要小于22mm),结果发现:稳定性最高(按OpenRocket的标准,重心在压心前方1倍箭体直径处时稳定性记为
针栓喷注器在液体火箭发动机上的应用
橘喵Meow
11个月3天前
回复于
喷气推进
机械与工具
内容:自行对比在燃烧稳定性方面,针栓喷注器被证明可以在大范围的推力水平和不同种类的推进剂组合上进行应用,且不需要任何稳定装置(如声腔或隔板)and在针栓式火箭发动机的试验中从未遇到到过声学不稳定的现象。
学习单片机和制作一些作品
全桥整流
2年7个月前
发表于
电子技术
科创基金
内容:本次研究主要是为了模仿制造出一个智能窗帘,可实现如:LCD1602显示实时光强,蓝牙控制窗帘自动上升下架,控制室内光强维持在一个稳定的值等功能。 ,或者是模仿制造出一个室内智能控光“系统”,能控制室内(桌面)光强维持在一个稳定的值,蓝牙控制灯的亮度,LCD1602显示实时光强等功能。
如何设计一种制度,来稳定高效地给每一个人都带来匮乏和痛苦?
三水合番
1年10个月前
回复于
管理学
经济学
内容:恐惧指不安全,不稳定,随时可能在上述匮乏的基础上变得山穷水尽,在上述痛苦的基础上痛不欲生。
用户实施KC761x能量订正的方法
KKshell999
15天2时前
回复于空间文章
用户实施KC761x能量订正的方法
内容:请教,温飘多久才能稳定?
HORIBA公司D500型气体质量流量控制器MFC拆解鉴赏
13331077502
1年11个月前
回复于
拆机鉴赏
仪器仪表
内容:带硬弹簧的哪个东西的作用应该是稳定中间细杆的作用。
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