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power_rdx
15年1个月前
回复于
高电压技术
内容:早就有人用闪光灯电路来
制造
电磁枪了,或者使用闪光灯管作为超大电流的开关元件。
林毓生:五四以后科学主义在中国的兴起
大仙
16年5个月前
发表于
科学技术学
内容:科学主义者认为科学能
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任何东西,包括生命的意义。
[转帖]岂止是审判科学——评《法官审判科学了吗》
1211
18年2个月前
发表于
科学技术学
内容:事实表明,“反伪帮”的大部分结论都是有问题的,他们
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了大量科学冤案,肆意诋毁中国传统文化,丑化宗教信仰,在中国社会早已引起强烈不满。
几种磁阻炮的弹丸稳定方案
Ma3.02的守望
8年9个月前
发表于
电磁炮
严肃内容: 专著/论述
内容:有翼方案的缺陷无疑是
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麻烦,常使用的6mm口径所需要的翼面用FDM的3D打印机也难以胜任,可以尝试使用光固化打印或者硅胶模具中预先放入带螺纹铁柱,真空浇筑树脂,整体取出。
创造性思维模式与DC理论
HMX
19年1个月前
发表于
科学技术学
内容:前者(创造性思维)解决如何形成创新的思想、理论及设计,后者则解决如何把创新的思想、理论及设计转化为实际的精神产品或物质产品(即写成文学作品、谱成乐曲、形成绘画或是
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出各种发明专利产品)。
HAARP “高频有源极光研究计划”
大仙
16年5个月前
发表于
强激光
内容:编辑本段 回目录 HAARP - 电磁辐射 美国国防部的HAARP项目最新成果,科研人员成功地在电离层的极光之中
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出了人造极光-在自然极光的内部,一个个绿色的人造光斑。,利用高频电磁波束对极地地球环境进行大规模试验,将对地球大气的对流层、同温层、中间层和电离层发生直接作用,地球大气的中间层和电离层将受到高频电磁波束的强大影响,使电离层被加热,离子体被人为地
制造
出来,并和地球的对流层相互作用,haarp将是一个人为
制造
的微波手指戳在网上,发出了混乱的信号,如果不拆除孔在线程" , "影响的干扰,这与交响乐的盖亚的地磁竖琴是未知之数,我猜想几乎没有想过,即使想大事,the energy level of charged particles.与此同时,军方在建立自己最大的电离层加热器然而,要刻意
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更多不稳定的一个巨大的等离子层, low frequency electromagnetic waves.他们发表的论文对电子降水量从磁层(外腰带带电粒子流,对地球的磁场杆)所造成的人为
制造
极低频电磁波
传媒扫描:3D彩色X射线扫描仪已经取得很大进展
科创喵
6年4个月前
发表于
核技术与核仪器
内容:菲尔·巴特勒指出:Medipix3芯片在
制造
MARS以及在医学诊断方面带来了很大的优势。
强烈推荐:常用的开源无人飞行器项目分享
拔刀斋
11年4个月前
发表于
电子技术
内容:==========================================================国内爱好者登陆Kickstarter的HeX微型四旋翼项目上次已经发了介绍:中国创客
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的四轴飞行器在
通报:沉默的来信
虎哥
13年4个月前
发表于
喷气推进
内容:6.试验准备、组织和实施过程中的安全注意事项试验准备和组织过程中会涉及到很多火、化工品的
制造
、储存、运输和使用环节,有一定的危险因素,需要加强安全防范意识。
介绍一下我两年来的工作:双平面质谱
Mr.ienore
8年4个月前
发表于
仪器仪表
动手实践: 实验报导,严肃内容: 专业科普
内容:文献中提及树脂的放气率是很低的,于是我当时就打算使用环氧树脂来灌封制作电极,然后通过顶针或者弹簧等方式连接(后来发现还是朴实地直接用导线连接稳定且方便): 然而这一批
制造
出来的电极质量差别很大,有的密封性极好
能够完虐检查老师IQ的充电宝的研发全过程
七公里垃圾站职业技术学院
9年0个月前
发表于
极客DIY
内容:例行前言:由于我是河南应届毕业生,所以家长对这方面的管控很严,而我的火箭项目已经搞到了 发动机试车 航电
制造
两个路口;前者需要搞出大动静,后者我的基础不足。
回 1楼(任某人) 的帖子
qwe
12年9个月前
回复于
电子技术
内容:会员在发言中,推介商品、服务,或探讨商品、服务的品质、性价比、可用性,或就不同商品、服务进行比较,或通过贬低、颂扬某商品、服务及其直接关系人,或诱发(含故意
制造
)争论等,推定能起到宣传商品、服务及其关系人的作用的
手机信号屏避那玩意是啥原理 能DIY不?
托尼史塔克
13年11个月前
回复于
电子技术
内容:如果在这一特定区域内人为地发射频率与该小区BCH下行频率相同的信号,且信号场强大于BCH,则处在该区域内的手机就无法接收BCH信号,从而使该区域的手机无法入网,手机信号屏蔽器就是根据这一原理
制造
的。
CO2 激光束几种聚焦方案的比较
我说要有光
15年9个月前
发表于
强激光
内容:反射聚焦的最大优点是镜子材料可以使用质量稳定,导热率好的紫铜,钼或硅
制造
,并且可以对镜子整体充分冷却。
氢能汽车
大仙
16年5个月前
发表于
极客DIY
内容:1807年Isaac de Rivas
制造
了首辆氢内燃车。,储氢合金在吸氢时放热,在放氢时吸热,利用这种放热-吸热循环,可进行热的储存和传输,
制造
制冷或采暖设备。,发展用储氢合金
制造
的镍氢电池(Ni-MH),也是未来储氢材料应用的另一个重要领域。,Billings
制造
了燃料电池的原型。,其次,
制造
在氢汽车提供电力可靠燃料电池,耗资颇高。
我想种点草莓,发点小财
diy患者
10年9个月前
发表于
农业
内容:我想把其他草莓的一些特性转进栽培品种来,可以转基因,但是鉴于我们对
制造
香味物质了解不多,这个很难,只能杂交,可是染色体倍数不同,杂交难度很大,以后再设计思路吧,比如可以用秋水仙素使染色体加倍,或者细胞融合什么的
楼主的误区,和其他很多同学一样……
hambaby
14年6个月前
回复于
电子技术
内容:试图使用半导体制冷器件DIY小型冷却装置(被冷却对象是密闭空间,或者
制造
冷冻盐水),需要补课掌握一些热工学基础知识。
【图纸开放下载】LRE5000液体火箭发动机参考设计
warmonkey
9年8个月前
发表于
喷气推进
内容:确定燃烧室内径100mm,长度150mm,喷管最窄处37.6mm,扩张比4.84 3.发动机结构设计 采用铜合金制成燃烧室,冷却方法采用燃料再生冷却,冷却流道采用先旋压后焊接方式
制造
燃烧室内壳体采用旋压方式
制造
全世界最炫酷的大学实验室
wsygz08
12年7个月前
发表于
科学技术学
内容:该实验室与汽车
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商以及运输部合作,以确定汽车和路边设施(如路灯杆,栅栏和标志牌)的安全标准。,最近的一个项目找到了一种在厄瓜多尔农村产生电力的方法,利用村民可
制造
及保养的部件。
[转帖]存在廉价发射方式之太空电梯
mass_lynnxy
18年10个月前
发表于
电子技术
内容:甚至因为拉扯而损坏,它的重心必须位于地球同步轨道上(距地面35800千米左右),以使它与地面上的对应点随时保持相同的角速度,而这个对应点,当然也只能在赤道上,至于经度是否也必须正对,倒不见得,只要“太空电梯”的设计
制造
者能够容忍它斜着向高空伸展出去
零排放的环保轿车 试驾奔驰Smart ED
mass_lynnxy
17年6个月前
发表于
极客DIY
内容:目前有些
制造
商已经研制出了适合全天候使用的电动车型,比如奔驰Smart。
爱迪生传
1211
19年2个月前
回复于
科学技术学
内容:爱迪生又与他立下合同,再
制造
3万根。,在纽约克自设
制造
厂。 ,设立发电机,地下电线,电灯零件的
制造
厂。,1914—1915 发明石碳酸综合
制造
法。,设立化学厂,自行
制造
苯、靛油等。
我国大力发展风电的前景分析
creator
19年2个月前
发表于
极客DIY
内容:上世纪80年代中期试制出的国产55千瓦风电机组在福建省东部岛县平潭并入电网成功,是当时国内自行设计
制造
并运行的最大风力发电机组,后来又试制了200千瓦风电机组投入运行,状况良好。,2000年,福建省电力局引进20台西班牙
制造
的MK-IV600千瓦定浆距失速调节型风电发电机组,总容量1.2万千瓦,在平潭长江澳风电场及东山澳仔山风电场各安装10台,目前都已顺利投产。
溴乙酸乙酯
新黑火药
15年9个月前
回复于
化学
内容:沸 点 158.8℃ 溶解性 不溶于水,可混溶于乙醇、乙醚、苯 密 度 相对密度(水=1)1.51;相对密度(空气=1)5.8 稳定性 稳定 危险标记 14(有毒品) 主要用途 用于有机合成,
制造
军用毒气
[原创]人们对创造力的几种误解
坚持01
18年10个月前
发表于
科学技术学
内容:这是上述第四种误解的衍生物,也不排除某些人为了某种需要人为地″
制造
″因素,其目的是要″忽忧″老百性以抬高研究者、专家等的地位。
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