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喷气推进
内容:然而直流式喷注器要达到相同规模的喷注效果,需要增加喷注孔的数目,直接影响了喷注面板的大小:例如美国 F-1 ;直接影响了发动机燃烧室的直径,导致更容易出现燃烧不稳定的情况;以及喷注面板需要更额外注意热防护
小猪当心,空气漩涡炮来啦~~
xyin
14年0个月前
回复于
极客DIY
内容:Zabusky,N.)和克鲁斯卡尔(Kruskal,M.D.)等在电子计算机做数值试验后意外地发现,以不同速度运动的两个孤波在相互碰撞后,仍然保持各自原有的能量、动量的集中形态,其波形和速度具有极大的稳定性
关于飞机自动驾驶避障的一些想法
天极航天TASE
6个月0天前
独立文章
内容:一、摘要为了防止鸟类撞击以及其他异物对飞行器的撞击给人民的财产生活带来影响,并且为了保证飞行器的稳定性,我们在飞行器的部分加装了非常小的装置通过大量的数据测试以及减法,使飞行器的处理更小型化,更加安全。
申请A基金 新型含能化合物工艺研发资金(I)
哈哈哈哈哈士奇
7年0个月前
发表于
科创基金
内容:因它们普遍地具有高能量、高密度、较高的热稳定性和较低的感度,又被称为新一代炸药或新世纪炸药。
过剩的风力能储存了
大仙
16年5个月前
发表于
电气电工
内容:挪威能量集团“NorskHydro”公司新能源负责人罗斯特鲁普说:“从多余的电力转化过来的氢能够成为一个巨大的能量载体,可以提供安全稳定的能量供应,与矿物燃料不同,不会带来有害的物质。”
生物燃料大有可为
大仙
16年5个月前
发表于
电气电工
内容:它可以缓解美国的石油供应,并有助于使美国的农业经济保持
稳定。
【电力电子】让我们畅谈电力电子爱好的发展
novakon
9年1个月前
发表于
电气电工
内容:而电力电子领域的主力方向——开关电源,也具有这一特性:我们分析反馈信号的变化,产生相应的控制信号,最终维持输出物理量的
稳定。
我的DR啊,弄死都不出电弧,调压器都调到200V了~!
山猫
9年4个月前
回复于
高电压技术
内容:测试极限并没有问题,只是建议做稳定些罢了。
无机硫氰酸盐手记-非金属篇
gkaf2007
1天4时前
回复于
化学
内容:通过缓慢降解亚硝酰硫氰酸与氟化硼或氯化硼的化合物,也可以得到不稳定的二硫氰氟化硼或二硫氰氯化硼加合物。 ,H₂OAO 氧化合物首先关于KSCN的读法,正确的应该是硫氰化钾,而不是硫氰酸钾,且盐的制备并不可以使用过氧化氢之类的氧化剂进行氧化,那样最后只能得到氰化物,硫酸盐之类的物质AO₁ 次硫氰酸盐 极不稳定,AO₃ 硫氰酸盐 到目前为止产生稳定的硫氰酸盐的尝试均以失败,一种方法是将K[NCSO₂]与SO₃反应,希望产生硫氰酸盐 K[NCSO₂]+SO₃=K[NCSO₃]+SO₂
YT-4发射跟踪全纪实(包括所有细节及技术操作环节)
jrcsh
11年5个月前
回复于
喷气推进
内容:引导伞自个飘走了引导伞被开出来,的话 箭体可能被翻转过了,又可能变成无规则翻转,在到稳定, 主伞又可能因内部负压被吸出,能不能开,,,又涉及如何安放, 会不会开了伞在云层上方票走~~~ 就要看看伞的指标了
【DSA神作】准备啃液机!争取三年入轨!
浪里黑条
5年10个月前
回复于
喷气推进
内容:如果LZ暂不考虑再生冷却等要求燃料有高热稳定性的技术,可以考虑在1688上购买。
[原创]不可迷信传统文化
1211
19年0个月前
发表于
科学技术学
内容:大力推崇传统文化,是保护社会稳定,淡化社会矛盾的一种手段。
怎样设计一组选择题,以高效地判断答题者家庭成分?
novakon
8年6个月前
回复于
科学技术学
内容:当然这和我们目前的事业形态有关——我们寻找的是能稳定地独当一面的技术或者业务合伙人,而不仅仅是拿钱干活的员工。
关于“中华民族是个劣等的民族”的争论
拔刀斋
13年3个月前
回复于
科学技术学
内容:某校接收的复原军人就是群架专家、不稳定因素;我们这里某校民族群架天天打,汉族就极少打架,好不容易鼓起勇气打一下,也是草草收场,自己闹内讧,自己人跑出来劝大家打架没好处,打架不是好学生,不要打了……动摇军心
第一代心电滤波算法测试
warmonkey
14年6个月前
发表于
电子技术
内容:而且要是由2阶部分(section)串联的(默认就是这样,不用特别设置)然后把系数四舍五入(quantize),使系数变为整数,一般选择fixed point ,word length =16,并且确定滤波器稳定
无机硫氰酸盐手记-非金属篇
gkaf2007
13时26分前
回复于
化学
内容:SiCl₄+4NH₄SCN=Si(NCS)₄+4NH₄Cl 新鲜制得的四异硫氰酸硅是稳定的无色晶体,但在放置数天后会变为淡黄色,而如果用银盐反应,则制取出来的就已经是淡黄色的。,当时用硫氰酸汞时可以获得最佳结晶,如果只需要溶液,氯仿或四氯化碳是合适的溶剂,因为他们不溶解汞盐,如果要分离化合物,二硫化碳是所需要的溶剂,二硫代硫氰是无色晶体,在-3度到3度熔化,形成粘稠的黄色无味液体,不稳定
【干货】高压电源制作相关整理
ry7740kptv
7年5个月前
发表于
高电压技术
内容:开关电源开关电源是利用现代电力电子技术,控制开关管开通和关断的时间比率,维持稳定输出电压的一种电源,开关电源一般由脉冲宽度调制(PWM)控制IC和MOSFET构成。,10k电阻为MOS管栅极下拉电阻,稳定栅极波形用。
关于固机最优工作时间的讨论
蜂起4223
13天4时前
发表于
喷气推进
严肃内容: 专著/论述
内容:在实际情况中,固机工作时间往往还会受以下三个因素的影响:1、稳定性:如果发动机工作时间较短,则稳定性相关的考量因素可以减少,即通过减小动力时间减少了火箭姿态变化对偏航的影响。,对于发动机具有长时工作能力且有鸭翼仓等控制飞行稳定结构的火箭,我认为应当适当延长发动机工作时间,可以更加有助于提升火箭的射高。
追逐暗之星辰——星系、暗物质及其它
大仙
16年5个月前
发表于
天文与空间科学
内容:它们能稳定聚集成像普通星系那么大的团块;如果团块太小,引力效果就不足以抓住它们。,例如,有人认为牛顿引力理论在大尺度上应该略有不同,引力在非常的遥远距离上比常规理论预期的要强一些,足以使星系稳定存在。
战斗机的隐身技术
wangyuewo56
17年1个月前
回复于
极客DIY
内容:反常吸收的种类很多,主要有: (1)衰变模及振荡双流不稳定性吸收,即电磁波的能量在临界密度附近能被全部吸收,变成等离子体波和离子声波的能量; (2)双等离子体模不稳定性吸收,即是电磁波的能量在四分之一临界密度处可能被全部吸收,(2)、外部开放式等离子体流场难稳定维持,很难形成大面积均匀等离子体覆盖层。,要在飞行器表面形成长时间稳定的大面积均匀等离子体更非易事。,弹道导弹要飞出大气层,在稀薄空气的条件下如何维持稳定放电?,在复杂大气环境下大气压放电难以稳定控制是限制其实用的最大障碍。
找了点资料 不过全是英文的
硝基丙三醇
9年10个月前
回复于
喷气推进
内容:低频不稳定的固体火箭发动机——马谢的影响效应和几何低频不稳定的固体火箭发动机——马谢效应的影响(出售1科创币, 250年KB,已下载0次)17岁。
自制USB温控炉
北落师门
10年4个月前
回复于
电子技术
内容:后来换了个方式,把烙铁芯做好绝缘和探头一起丢到一杯水里,再控温时温度变得很稳定,波动不超过0.5℃。
6kj三匝增强型轨道炮
Ma3.02的守望
2年4个月前
回复于
电磁炮
内容:2、电枢歪向一侧,大概是电枢尾部强度不够,也许可以用树脂把尾部鳍片间隙填充,形成稳定的矩形结构。
请高手指点一下这个金属探测器的图纸
wxr1
14年0个月前
发表于
电子技术
内容:发射电路如图(b)所示,由多谐振荡器(IC1、R1、R2、C2)、单稳定时器(IC2、R4、C4)组成,且定时器IC2受多谐振荡器IC1输出的脉冲触发。
【PointsMake】嵌入式制作-GPS码表(直播)
pointsmake
11年7个月前
发表于
电子技术
内容:这款模块可以很好地接收卫星发射的信号,在信号好的时候,能收到十余颗卫星的讯号,稳定接收到6-9颗卫星的信号。
康达效应飞碟
大空间
12年5个月前
发表于
航空技术
内容:四个伺服机(舵机)在同一个平面上,并受反扭矩压电陀螺的控制,用来纠正航向偏差 最后,强烈建议增加一个高60mm,直径280mm的围栏圈(如下图) ,固定在外壳上方45mm处——这样可以极为有效地提高升力及稳定性
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