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约找到 5660 条结果,耗时 0.234 秒
令电磁枪子弹旋转简单方法
leeye
12年8个月前
回复于
电磁炮
内容:稳定的内弹道+稳定的外弹道得到稳定的射击效果。,在膛线枪中,有稳定的内弹道是因为适口径,有稳定的外弹道是因为弹形+旋转。,滑膛由于内弹道不如线膛稳定,所以精度不如线膛。
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?
虎哥
1年4个月前
回复于
管理学
经济学
内容:总的来说,一个所有人无一例外都立即受损的制度,是很难稳定的。
事实证明简单的脉冲自吸炉是可行的
Gdeestan
17天14时前
电波长电文
内容: 向半个易拉罐加入塑料袋或零食包装袋加热至塑料熔融点燃即可,所用塑料必须干净不然会有难闻的气体冒出(油)用嘴是吹不灭的,必须用水浇灭(摄像色偏了,实际是比一般燃气灶明亮的多的亮黄色火焰)稳定工作时的声浪工作后炉口的位置因为工作温度过高熔损了一部分,(毕竟是铝)不知道为什么变黄了 几个塑料袋就能稳定的燃烧几分钟,燃料不太多时并没有明显的黑烟冒出
或许是首个太阳能球粉机
傻逼
2年3个月前
回复于
机械与工具
内容:直流电肯定比交流电稳定,当然可能产生的火花也少,而且太阳能供电也比大多数交转直的输出
稳定。
,未必一定静电少,,但肯定
稳定。
在实验乞丐版Fusor时观测到的有趣现象
汉斯喵喵
2年2个月前
回复于
核技术与核仪器
高电压技术
内容:从装置启动一直到装置稳定的视频
氢氧化银相关研究一(制取)
zx-97396
1年8个月前
电波长电文
内容: 氢氧化银(silver hydroxide)是一种无机化合物,化学式为AgOH,具有两性,是一种白色固体,常温下极不稳定,易分解为褐色微溶于水的氧化银。,氢氧化银是不稳定的,在初中阶段的实验中会直接分解成氧化银。,但是氢氧化银仅仅是不稳定,在低温条件下可以保存。,如果该方案可行,那么后续对氢氧化银的研究将会变得更简单,但是尽管将生成物放入干冰桶中保存,但由于氢氧化银太不稳定,所以氢氧化银还有可能直接分解。
【59元套件】 ‘Fulcrum’复用型铝合金固体火箭发动机套件预售中
魏学宁
1年4个月前
回复于
会员海报
喷气推进
内容:推力和是否稳定输出是燃料的问题了
蓝牙音乐特斯拉线圈
科创供销
5年1个月前
发表于
会员海报
内容:在这个版本的微型音乐特斯拉线圈中,我们把散热器升级到大号,散热性能更佳;整个系统的工作更
稳定。
,次级线圈采用化学玻璃作为骨架,比一般塑料水管做的次级更稳定,更耐高温。
Nivel 20 精密倾角计
qiuzheru1
1年2个月前
发表于
拆机鉴赏
内容:光学组件就不敢拆了,从网络上找到一张内部图,供参考这个传感器基本上代表了state-of-the-art的分辨率与稳定性指标,可以分辨到1 um/m = 1 urad = 0.2 arcsec, 零点稳定性指标值,< 5 urad/˚C,并且没有长期稳定性问题,好于大多数servo inclinometer或者MEMS inclinometer。,首先是稳定性与噪声。,这是放在公寓地板上记录大半天的结果,可见有一轴在缓慢但稳定的漂移,而另一轴相对更noisy一点。,因为楼板的不稳定性,长时间稳定性是没法测的,对于较短时间尺度上的稳定性,可以用Allan variance来表征看上去与捡来的SX41210差别不大,在10 s到100 s积分时间左右能接近0.1 urad
昨天在一个很久以前加入的化学Q群里讨论的问题
lily
14年7个月前
发表于
化学
内容:题目是,碘化银和氯化银在酸性环境中哪个更
稳定。
,我的答案是氯化银更
稳定。
一个热成像图像识别的计划
smith
3年9个月前
回复于
电子技术
仪器仪表
内容:层主用的是TVP5150还是TVP5151,需要软件作BT656转RGB吗,稳定的话可以做到多少帧
影响激光切割机精度的有哪些因素?
蒙奇路飞
10年3个月前
发表于
仪器仪表
内容:第二、控制系统不稳定:控制系统不稳定就会导致的切割缓慢。,由于数控系统的CPU和硬盘发热,导致系统不稳定,不能全时工作;或是风扇磨损,硬盘震动或感染病毒损坏,导致生产停滞,还有可能是数控系统的切割控制软件有缺陷,出现故障或切割错误,也会延误切割生产,影响切割质量等问题,第五、电压不稳定:如果电压出现不稳定的情况,激光切割机的质量会受到严重的影响。,所以如果在电源不稳定的地方一定要配备稳压箱。
【水】【KC资助】SORT 射电望远镜控制部分的研发
大仙
5年1个月前
回复于
极客DIY
天文与空间科学
内容:动态域名稳定性极低,正规项目没有用的,阿里云mqtt服务器有免费额度一个月100w条,应该够你用的了
KC908频谱仪内测版软件缺陷收集
bh4ilp
3年10个月前
回复于
仪器仪表
内容:1.2.0 稳定重现 从接收机模式preset之后 回到频谱界面 喇叭依然在响。,不稳定重现 preset 执行后状态不改变。
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4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。
“砲射导弹”系列文章(1):用刚体力学求解一种重力投石机的运动
杂工1544
2年1个月前
回复于
机械与工具
物理
内容:或许可以用尾翼稳定弹药,内置高速转子,发射的瞬间让高速转子刹车停下来,从而起到消除自转的作用?
谈谈人造金刚石技术的新进展-实验室培育钻石
虎哥
5年1个月前
回复于
晶体养成所
内容:微波的稳定性对工艺条件的影响很大。,微波幅度的稍微变化,也会让等离子体变得不
稳定。
,通常,我们要求微波系统的频率稳定度应优于10e-5,幅度波动应不劣于10%。,而对于真空管系统而言,幅度的稳定度稍微容易达到一些,频率的稳定度能做到10e-4就不错了,比要求的指标低一个数量级。,为了改善真空管系统的性能,通常需要高稳定度的电源,另外进口的磁控管(例如日本东芝的6kW管)更容易达到要求的指标。
涡喷为什么不倒喷
坚定的潜水党
13年7个月前
回复于
航空技术
内容:[s:125]个人见解,不对请指出1,和火焰稳定设计有关 燃烧室的内部,一般有一个火焰稳定器,或者一个替代火焰稳定器的燃料蒸发器,其作用是让涡喷能保持火焰的稳定,想象涡喷内部气流流动,火焰燃速一般是小于涡喷内部的气流流动速度的,如果没有火焰稳定器,可以想象燃烧部位会被吹出涡喷导致发动机停车。 ,而火焰稳定器一般是单向工作的,也就是说只有当气流正向流动的时候,火焰才可以保持
稳定。
是谁 设计的这么精准严密的生物链............
acmilan
7年8个月前
回复于
生物学
内容:一些比较不稳定的分子和自由基自发组合起来了,其中某些组合真实起到了一定的效果,于是就出现了生命物质,这些生命物质又有不稳定的,就又自发组合起来了,其中一些组合真实起到了一定的效果,于是就有了最初级的生命
拆【安利MH648A】前置放大器
虎哥
9年6个月前
回复于
仪器仪表
拆机鉴赏
内容:单支管子的mmic现在30dB的稳定增益还是比较难找,这个不大不小的增益,一般还是得用两支管子。
真正改写历史电容,电感混合三点式振荡器
超新星のktjc
11年6个月前
回复于
电气电工
内容:我模拟一般zvs波形的振幅很不稳定,可是模拟这个zvs振幅却非常稳定,这就说明这点路还是有区别的,虽然不是特别大。
基于航模技术的探空火箭姿态自稳定装置
虎哥
3个月19天前
回复于
航空技术
喷气推进
内容:如果有鸭翼很容易静不稳定,靠这个飞控恐怕搞不定。
简谈火箭不稳定运动
hypersonic_m
2年2个月前
回复于
喷气推进
内容:俯仰,偏航,滚转都是飞行器(包括火箭)的基本运动方式,这在任何一本飞行力学书里都可以见到,不是你所说的不稳定运动。,说火箭飞行的稳定性,就要定义稳定性是什么——和其它动力学系统一样,我们说的稳定性都是用的李雅普诺夫定义下的
稳定。
,火箭的稳定性实质上是运动方程解的稳定性:只考虑俯仰力矩的复攻角方程解的稳定性——静稳定;考虑俯仰力矩与陀螺力矩——陀螺稳定;考虑全力矩——动稳定;此外,火箭还有追随稳定,这是根据任务特性来的。
【Caesar】套件发布!!
caesar_king
10年0个月前
发表于
跳蚤市场
内容:周一到周五晚6点到10点,周六周日全天) QQ:490030064(备注科创) 此次发售三款套件: 一、经典ZVS套件 1.电路板材质为双面1.6mm军工板,大面积敷铜走线,大功率运行非常稳定,2.谐振电容采用保真优质丰明电磁炉谐振电容,大厂家好产品,稳定性极高 3.G极输入电阻采用3W 1%精度金属膜电阻,保证稳定性 XXXXS采用大散热片,保证在满负荷工作时电路的极致稳定性 5.所有元件均采用优质高精度元件
登天-4发射成功(图片视频贴)
山氰水溴
4年9个月前
回复于
科创基金
喷气推进
内容:谢谢建议,稳定装置和壳体使用3d打印技术制造,后期我也准备改进壳体,设计使用复合材料制造
双氧水和氢氧化钠能共存吗
焓熵`
13年7个月前
回复于
化学
内容:氢化过氧负离子趋于不稳定的状态!,而过氧负离子更加趋于稳定!,所以,反应方向趋向稳定态,so没有氢化过氧负离子存在,也可以说不可能稳定存在!,所以某童鞋所说的NaHO2是不会稳定存在的!!!
便携式,半自动,10级加速,12J动能,45米/秒,磁阻枪!
yszg268
8年5个月前
回复于
电磁炮
内容:引用 1642223032:弹丸怎么稳定的?,这种弹丸飞出去后不能稳定,威力不到一定级别稳定意义不大。
===扫盲贴: 仪表不太准,怎么才能测准未知量?===
RodTech
10年4个月前
发表于
仪器仪表
内容:1、平均值法 解决的问题与适用范围: 测量仪器噪声大(短稳差),但长期稳定性良好,比如某个电压表,测量1.00000000v电压,显示末尾数字经常在0.99999995-1.00000005,操作方法: 按照噪声大小与仪器实际情况,酌情(有数学依据地酌情)选择合适的测量时长,时间越长,平均值越稳定,测得越准,但是时间过长也不可,过长就无法忽略长期稳定性了。,2.背靠背法(B2B测量) 解决的问题与适用范围: 表的长期稳定性不好,不能单纯采用平均值法,但是在短时间内(比如10秒内)有很好的稳定性,且线性精度优良,又有一个非常稳定的参考基准。,这种方法经常与平均值法联用,事实上很少见到单独使用的情形,除非你的表真是太稳定了,测量时末尾数字一动不动。
求教:超导体在磁场上悬浮起的那一瞬间是否能量守恒?
414984185
10年6个月前
回复于
物理
内容:不违反能量守恒,即使是超导体,一通电后电流也不是立即稳定的,而是有一个过程,磁铁上升的能量,就是在这个稳定的过程中变化的电流对其做的功提供的。
【59元套件】 ‘Fulcrum’复用型铝合金固体火箭发动机套件预售中
CIT
1年4个月前
回复于
会员海报
喷气推进
内容:发动机推力有多少,能够稳定输出吗?
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