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【MS精工】超级电车“风暴之灵”诞生记
akatsuki
11年7个月前
回复于
电动汽车
内容:如果是在中国市区高速稳定性是跟鸡肋一样的存在。。。
搞了一块有级别的石头,不知往哪儿放
metellan
11年9个月前
回复于
仪器仪表
内容:长期稳定性好应该是最关键的。,大理石是变质岩,经过自然的高低温处理和地质年代的“自然稳定”,内部应力非常小。
回 119楼(akatsuki) 的帖子
power_rdx
11年7个月前
回复于
电动汽车
内容:是的,相比立式车,躺车要更难掌控,但是高速稳定性要更好
火箭重心压心对火箭飞行的影响(鄙见)
hypersonic_m
2年3个月前
回复于
喷气推进
内容:静稳定裕度一般用压心重心距离与弹长之比衡量,20%以上认为是静稳定的,10~20%认为是低静稳定裕度的,这只是一个经验说法,没有统一标准。,燃料一致性属于品质问题,喷管歪斜属于推力偏心,与静稳定性无关。
示波器莫名其妙的噪声求解释
Einstein
9年10个月前
回复于
仪器仪表
内容:那种环氧树脂铸死的电源切断220v输入 电源输出会很快掉下去很可能没有输出滤波或者很小 那就不好说了,输入不稳定输出可能稳定吗
回 50楼(玄明) 的帖子
拔刀斋
11年8个月前
回复于
电动汽车
内容:自行车重心越高倒下来越慢越好控制,倒立摆跟稳定的物体相反
四通道同步采样功率传感器KC9532
kcma
4年3个月前
发表于
仪器仪表
会员海报
内容:如果三个数值基本相同,说明微波幅度
稳定。
,对于幅度不太稳定的微波源(例如磁控管),系统中各个监测点应当同步采样,只有这样获得的数据才能相互比较。,可同时工作同步采样,可用于时变信号测量0.5dB绝对不确定度(典型值)0.2dB相对不确定度(典型值)200ns最小脉冲宽度10MHz最大信号带宽峰值、平均值、均方根值检波脉冲宽度、脉冲周期测量3、适用领域任何稳定信号功率测量某些雷达发射机工业微波系统,技术参数指标名称测试条件最小典型最大单位/备注频率范围14000MHz功率范围-5010dBm不确定度全部功率范围0.51.5dB,25℃-20~+6dBm0.31.0dB,25℃温度漂移-20~85℃0.51.5dB长期稳定度
【求助】特斯拉线圈,磁环反馈无法起振,请大侠帮忙看看
wzg640
6年8个月前
发表于
高电压技术
内容:开始阶段不稳定,顺利起振后,波形
稳定。
,稳定后波形细节如下辐射频率变为415KHz。
[实验]过氧化铬
百死不悔
14年0个月前
发表于
化学
内容:在大学无机化学上发现了这个反应以下为资料(纯手工键入):Cr2O72-+4H2O2+2H+=2CrO5+5H5OCrO5为蓝黑色沉淀,也可写为CrO(O2)2的形式,在乙醚中较稳定此反应用于鉴定H2O2,同时CrO5不稳定,易分解:4CrO5+12H+=4Cr3++7O2↑+6H2O偶然搞到了乙醚,所以就来制取看看 一点重铬酸钾晶体 溶解之 加入过氧化氢以后的现象 一会以后,有气泡冒出......
回 87楼(shao190) 的帖子
小龙
11年5个月前
回复于
计算机电子学
内容:目前27MHz下稳定运行。
生命是什么?E.薛定谔
thallium2012
14年9个月前
发表于
生物学
内容:分子的稳定性有赖于温度 37. 38.,与事实作比较:稳定性的程度;突变的不连续性 48.,自然选择的基因的稳定性 49.,突变体的稳定性有时是较低的 50.,温度对不稳定基因的影响小于对稳定基因的影响 51.
二氯卡宾为什么是单线态稳定?
小白精神
12年4个月前
回复于
化学
内容:普通卡宾因为三线态夹角大,能量低,更加
稳定。
,但是二氯卡宾中,氯有p轨道电子,能与单线态中C的p空轨道形成p-p键,增加稳定性,单线态能量更低,更
稳定。
回 18楼(power_rdx) 的帖子
dr.lc
11年11个月前
回复于
物理
内容:事实上根据能量最低原理,应当是能量越低越稳定吧。。。,反应速率慢→较为稳定→能量较低这与16L提出的能量升高不符合啊。。。
重刚体定点转动的两种可解情况的求解——欧拉-潘索情形与拉格朗日-泊松情形
某倒吊的亚雷斯塔
10个月6天前
回复于
物理
内容:那么,现在讨论一下无力矩的情况下刚体绕主轴自由转动的平衡稳定性:我们先假设刚体绕着转动惯量最大的3轴自由转动,1、2轴角速度为零,由欧拉动力学公式(1.6.3)有\(\dot{\omega_3} = 0,不难看出,对i轴(i= 1,2,3),Ai>0则稳定,其余情况都不
稳定。
,,绕转动惯量中等的那个轴转动不稳定,将迅速变为定点转动。,叫做网球拍定理,名字来源好像是扔网球拍的时候可以观察到这个现象,下面给两张绕轴转动不稳定的动图。,那对于绕2轴的不稳定情况、一开始不绕任何主轴转动的定轴转动和一开始就是定点转动的更加一般的情况呢?
HP8565EC频谱仪的内部图
chicken446
3年2个月前
回复于
拆机鉴赏
仪器仪表
内容:而且RBW可以设置到100HZ以下,有这样的频率稳定度,滤波器有这样的分辨率,当年属于顶级设备了,严格限制出口、转运。
电解获得的高铁酸钾稀溶液
苯萘蒽菲
15年10个月前
回复于
化学
内容:在1mol/L的KOH中重结晶,纯品很稳定,可加入高碘酸盐稳定剂
2012 太阳爆炸了。
yanli12321
12年4个月前
回复于
天文与空间科学
内容:好像银最稳定吧......
2014年化学竞赛初赛的一道题
阡陌け徘徊
10年4个月前
回复于
化学
内容:本帖最后由 阡陌け徘徊 于 2014-9-1 12:59 编辑 我参加过2013的......拱桥式结构为最稳定的构型,正方体型、畸变的拱桥式和正八面体型结构为较稳定构型,带二个双键的七员环构型是最不稳定的构型
硫酸四氨合铜能否加热结晶
消失
15年9个月前
发表于
化学
内容:这东西稳定吗????
求电子管CW收信机电路
立棍
12年5个月前
回复于
无线电
内容:因为现在已经很难找到高稳定的磁芯和骨架了。,本震原件必须稳定,如果关键原件能合格,理论上稳定度大概能接近石英晶体了。
求大神 尾翼这么做可以么?
drinks
9年5个月前
回复于
喷气推进
内容:引用 法式油炸薯条:这个起到的稳定效果很小,建议还是使用传统尾翼 请问传统尾翼是三片稳定还是四片稳定?
关于修改震电气动外形的问题
y5664579
11年8个月前
发表于
航空技术
内容:同时双发提高安全性2,将发动机置于两个机翼根部位置 做两个叶片直径的类似函道的通道(机翼根部在里面) 设想用于提高起飞时的升力3,去掉垂尾 用两个发动机的小推力差控制转向 大推力差用于机体旋转4,为了增加稳定性,在机翼翼尖加上翼尖帆下面为可选项5,去掉主翼襟翼 同时把主翼形状设置成 少量的拉升状 有效的增加低速飞行稳定性6,鸭翼可动 用来弥补襟翼的缺失 同时平飞时维持拉低状态 平衡机身 虽然损失一点能量,不过可以提高整体稳定性设想效果 起飞时主翼升力和鸭翼升力共同作用 降落时 鸭翼运动进行降落 发动机反向旋转 使主翼升力减少 从而维持平衡状态这样的改动 不知道还能不能飞起来。。。。
转:参考放大器SZA263与超级电压基准LTZ1000
metellan
11年4个月前
回复于
仪器仪表
内容:按照399的稳定度,也就够6位半转移或5位半校准用,距离PPM级差太远了。,7V升10V的稳定度真心难做,就不贴出来丢脸了。
求助:mpu6050陀螺仪DMP 获取到的四元数
ksws0263785
10年5个月前
回复于
航天技术
内容:已经可以稳定的得到欧拉角了。
532nm 100mw激光驱动
robinsondong
11年4个月前
发表于
物理
内容:这两个的电流是相同的,为什么亮度差距这么大,并且暗的那个亮度还不稳定,懂得朋友帮看看。
【第二届晶体制作大赛】关于本次比赛规则变动的通知
哈哈哈哈哈士奇
4年4个月前
发表于
晶体养成所
内容:二:变更限定晶体材料稳定性的相关规则 原规则如下: 晶体必须是稳定、可长期保存的,熔点高于60℃,不得具有易潮解、易升华、易降解、与空气反应、易风化、见光死等特点。,采取真空玻封、气体保护玻封、透明树脂灌封等不影响观察和测量的专业手段加以保护并具有长期稳定存储条件的,可以不受易潮解、易风化、与空气反应等禁忌的限制。,为增加比赛挑战性,现不再硬性规定晶体材质必须符合原规则限定,不稳定的晶体,能够采取不影响观察的可靠措施使之长期保存的,可以视为稳定,选手可据此选择参赛晶体材质,但需要注意的是,选手提交参赛作品后,组委会默认该选手可良好保存该作品,含能类晶体必须经过充分精制2:禁止所有有机过氧化物参赛3:猛炸药(非起爆药)应具备以下要求(1)开放燃烧无法DDT(2)在硬纸管中干燥松装的粉末,使用至少0.2g含铝点火药的强点火条件下在纸管中无法DDT并稳定传爆
原子拥有中子的能力超乎想象!!!
theo
15年1个月前
发表于
物理
内容:两个质子之间和两个中子之间结合力的强度较弱(质子由于电性相互排斥),原子核能够稳定存在主要是由于质子—中子对之间的作用。,因此,有理论认为,原子稳定存在的一个条件是原子核中的质子和中子数不能相差太多。,正因如此,核物理学家长期以来热衷于寻找这种稳定性的界限,称为“中子滴线”(neutron drip line)。,美国密歇根州立大学国立超导回旋加速器实验室(NSCL)的Thomas Baumann和同事不仅创造出了拥有更多中子的超重铝、镁同位素,而且发现这些同位素能够比较稳定地存在一定时间。 ,根据现行认识,中子个数是偶数的原子更加稳定,因此拥有29个中子的铝-42同位素理论上是无法稳定存在的。
让电磁枪子弹旋转的办法
mirroryqj
12年6个月前
回复于
电磁炮
内容:其实电磁枪不用旋转稳定,弹道稳定与否主要是看内弹道稳定否,电磁加速炮弹是在线圈中悬浮加速,稳定性很好,内弹道没有火药燃烧不充分,受力不均匀的情况,当出枪口的时候速度已经比较快了,基本不受横风影响,就算安装了尾翼或者旋转出膛
新型集成光学多路光脉冲产生系统
大仙
16年0个月前
发表于
强激光
内容:系统采用光纤光波导技术,使前端系统达到了集成化、模块化的效果,解决了极多路的分光束问题,提高了系统的稳定性和可靠性。,系统具有灵活的时间整形能力、易于分束、系统易于运行及维护、柔性长程传输以及高稳定性、高可靠性等技术特点,同时具有精密功率平衡及精密时间同步调整功能。,采用该项技术研制的光脉冲产生系统已经在“神光”–Ⅲ原型激光装置上应用并稳定运行近两年多时间,状况良好、稳定性优异,达到了预期的目标。,在国内首次将全光纤全固化的新型前端技术路线应用于大型激光装置,满足了“神光”–Ⅲ原型装置对多路种子激光脉冲的要求,并能提供长期稳定地运行,系统所达到的技术指标如表1所示。,第二路 第三路 第四路 5.12 W 5.80 W 4.03 W 5.19 W 4 重复频率 1,10 Hz,1 kHz均可工作 5 脉冲波形 主脉冲宽度1~5 ns(具有较强的整形能力) 6 单束稳定性
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