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内容:系统的有序联系保障着系统结构的稳定性,系统有序性的降低意味着系统稳定结构的削弱或瓦解,研究系统的有序性是研究系统运动规律的重要途径。,可以看出,正反馈倾向于系统偏离目标的运动,使系统趋于不
稳定。
,这种结构在一定的条件下保持着一种稳定的结构,系统内部的热运动不能破坏系统整体的有序态,只有在条件激烈变化下,系统才可能由平衡的稳定有序状态变为不稳定的无序的混乱状态。,耗散结构与平衡状态下的稳定结构不同,稳定有序的平衡结构是一种"死"结构,它不需要外界供应物质和能量来维持,稳定有序的非平衡结构则是一种"活"结构,它要求不断地与外界发生物质和能量的交换,才能维持它的有序状态,在远离平衡态时,系统中一个微观随机小扰动就会通过相干作用得到放大,成为整体的宏观"巨涨落",推动系统从一个不稳定态跃迁到一个新的稳定的有序状态,这里涨落成为驱动系统由原来的稳定分支演化到耗散结构分支的原初推动力
能源关键技术发展现状和我国与世界水平的差距
大仙
16年5个月前
发表于
电气电工
内容:(2)灵活的交流输电技术 灵活的交流输电系统(FACTS),是八十年代后期出现的以电力电子和现代控制技术为核心的电网新技术,它可以灵活调节电力系统的参数、潮流,提高线路的输送能力和稳定极限。,超导储能系统由于能量存取响应速度快,现多用于电力系统稳定控制、旋转备用、负载快速调节等。,美国计划兴建1800MJ的超导储能装置,用于调峰和改善系统
稳定。
kasim抢救仪器战果
lizhihong
14年7个月前
回复于
跳蚤市场
内容: 其实很好办的 首先是包装 玻璃仪器 外面纸箱 里面垫泡沫 没有泡沫就把报纸揉了多报几层 纸箱外面贴上“玻璃制品” 这样快递就小心了 再说固体试剂 这个就好办了 直接上纸箱 不稳定的加点泡沫
试车台的搭建
华夏青年
1年3个月前
发表于
喷气推进
内容:款式如下图),共用到40cm*2根20cm*6根8cm *1根(若使用悬臂式传感器可不用)由于考虑到便捷性,我试车台尺寸设计为比较小使用角码固定连接,共使用了 20 个角码,组装方法如下图为了使龙门架更为稳定
KC901K、KC901J、KC901R固件升级指南及固件下载
kcma
1天15时前
专栏文章
科创仪表
内容:0.1.5版本,2024年7月12日发布,约4.83MB(废弃)修复上一版本发布后积累的BUG,增加稳定性。,1.0.5版本,2024年11月8日发布,约4.98MB(废弃)修复了连接KCSDI时必然宕机的问题;加快了连接KCSDI时的扫描速度,并修正了若干错误,提高了稳定性;修复了对KC901R的兼容性问题(,遗留问题包括:全双端口校准算法有错误;切换模式或校准方式时,可能出现输出失效,通过RUN/STOP可恢复;另有一些尚未修复的不稳定和卡顿问题。
自动称重选别系统的研制
liulong84
18年11个月前
回复于
电子技术
内容:平带的接头,采用“齿形啮合”的形式,这比重叠式接头的速度要高,并且平行度高,工作稳定性好。,它具有准确度高,结构合理,偏移误差调整方便和长期稳定性好等优点。?,这里采用并联组秤的方法,并联后传感器的总输出电阻小,信号传输系统的抗干扰能力加强,迟滞重复性指标大大改善,长期稳定性好;并且总的输出电压与被称物品重成线性关系,不受物品在传输带上位置的影响。?,试制系统通过试运行,工作稳定可靠,实现了提出的研制主要技术参数。
RMR的Micro - HFSSTC @2Mhz【class-e】
任某人
11年8个月前
发表于
高电压技术
内容:由于一开始得到的结果会震荡在6mhz左右,于是就准备用24mhz晶振四分频得到6mhz的信号快速起振,随后由天线反馈压过晶振信号上网找了找晶振的振荡器,找到这个,还算很稳定,之后喂给两级d触发器以分频,
【SORT】“星火”一米口径射电望远镜项目完成情况简要报告
154454496
5年1个月前
发表于
天文与空间科学
电子技术
内容:经测试,这一方案工作稳定,性能良好。
如何设计一款适合大范围中继联网的轻量级数字通信协议
虎哥
3年5个月前
发表于
无线电
内容:别说通话,就是能传高清图像的百公里自组网电台也已经快要普及了,背负式散射通信机也能实现稳定的点对点互联网透传,距离几十到几百公里。
KC-R100对数周期天线400~3000MHz宽带印刷天线正式发售
虎哥
11年6个月前
发表于
跳蚤市场
内容:额定增益:5dBi R100在标称频率范围内增益基本稳定,围绕5dBi上下波动。
提问:关于PLASMA状态的一些疑惑
月下孤狼
2年3个月前
回复于
高电压技术
内容:关于电弧分叉,如果电源和环境稳定,那么电弧的最终形态一定是只有一根,电弧所在区域电导率是空间中最高的。
二甲醚的生产方法比较及市场预测
大仙
16年5个月前
发表于
电气电工
内容:(3)反应平和稳定,能耗少,易控制。 ,以二甲醚为基础原料配制的环保制冷剂,具有无毒无害、安全可靠、化学性能稳定,单位容积制冷量大,流动阻力小,在常温和低温范围内压力适中,热效率高等优点,是一种很有前景的氟利昂长期性替代物。
猜想:PH4ClO4作为自制火箭固态燃料如何?
侧卫007
13年2个月前
回复于
喷气推进
内容:而且如果在常温都有分解的话,储存就需要冰箱,而且容易变质性能也不稳定……我倒是觉得某些十分顿感的新型能材可以加入燃料试试(以有文献的为准)。
层流质量流量计在环保行业的应用优势介绍
小德喵喵
2年7个月前
发表于
仪器仪表
内容:另外,在流量控制方面,我们说一说苏玛罐采样器,苏玛罐采样需要在特定时间内采集一定量的空气样品,苏玛罐则是从真空状态慢慢变为常压,这个过程需要流量控制器能够以稳定的流量向罐内填充空气,以保证在24小时或者
620v IGBT半桥式 MCU开环控制 紧密加速线圈炮测试更新:七级已破百
iSee
7年0个月前
发表于
电磁炮
动手实践: 实验报导
内容:准备了两个月时间,期间烧掉了一堆IGBT和驱动芯片还有MCU,终于能够稳定下来了。,最大的好处是4层镀金板,稳定性不错:实际测试情况:发射后剩余电压:252v/358v/362v/335v由图可见在622v的情况下,35mm弹丸通过时间是456us,换算成出口速度是v=35/0.456,94.08m/s,61.08J,ΔE=10.31J,平均加速度24589.38第七级平均速度:101.74m/s,71.43J,ΔE=10.35J,平均加速度24647.33动能继续在平稳增长、加速度继续稳定在
头疼系列三: P90
头疼脑壳昏
2年4个月前
发表于
电磁炮
动手实践: 实验报导
内容:奈何最后两级加上去后越调越慢,越调越慢, 最后17级一起稳定在123.,使用maxwell仿真时序.最终速度稳定在125-127m/s. ,maxwell仿真出来的时序.相对手搓时序略微稳定一些.
长寿基因挑战寿命极限
123123123
14年5个月前
发表于
农业
内容:在普通的酵母菌细胞中,存在着超过100个这样的rDNA重复序列,而且它们相当不
稳定。
,我们对酵母菌的研究显示,母细胞的衰老是由某种形式的rDNA不稳定性所造成的,而Sir蛋白则可削弱这种不稳定性。 ,实际上,我们发现了一种惊人的rDNA不稳定性。
电工电子技术文章汇总——不能错过
yoto17
14年10个月前
回复于
电子技术
内容:示波器的触发部分的作用就是稳定的显示波形,触发释抑也是为了稳定显示波形而设置的功能。,比如图中所示,图中红色的点都可以满足触发条件,如果不用释抑功能,触发点将不固定,造成显示不稳定,使用触发释抑后,每次都在同一个点触发,因此可以稳定显示。,答:对于数字示波器,不论是否触发,示波器实际上都是在不断地采集波形,但是如果只有稳定的触发才能有稳定的显示。,22.关于holdoff,如果在水平时间分辨率不变的前提下,是否百分比设置越大(对应信号显示逐渐稳定)那么就意味着信号的周期越长?
汽车自动升降器
wenjizu
10年4个月前
发表于
极客DIY
内容:升起的高度限制为1米,因为升起越高的话稳定性越不好把握。
自制涡轮喷气机!!!简单易制!!!
迅龙
11年10个月前
发表于
极客DIY
内容:火焰稳定器。。。
准备做个广播级高音质FM,AM,SW,全波段信号发射器。
铅球脑袋
1个月28天前
发表于
极客DIY
内容:这样可以长时间测试这些收音机稳定性。
zt一种太阳能电池充电控制器
1211
17年5个月前
发表于
电气电工
内容:可调三端稳压器LM317提供给LM393稳定的8V工作电压。
DIY一个50V 50A 最大300-500W的恒流电子负载,缓慢更新中
wwwajjlcn
9年9个月前
回复于
电气电工
内容:好了继续更帖,PWM-ADC的调试 最初的ADC算法是 15ms的PWM延时 x 16次对折逼近 ,电压输入端口直接短接为0v,最终读数640多,7个字的读数抖动范围,这稳定性真惨。。。
开关电源简介
longgexu
13年2个月前
回复于
电气电工
内容:调制振荡器的脉冲宽度,从而控制变换器以保持输出电压的
稳定。
(求助)现在哪种有限元软件比较好,求推荐
硝基丙三醇
9年11个月前
回复于
喷气推进
内容:它通过变分方法,使得误差函数达到最小值并产生稳定解。
关于火箭燃烧室.燃料与喷嘴
laser63588
18年4个月前
回复于
喷气推进
内容:(2)再继续打入黑火药,我做的黑火药用铁锤死命也砸不爆,所以我就是尽量的往里面打,一加大装药密度,同时提高燃烧稳定性。
科创航天局将择机发射万户0型二级火箭
power_rdx
13年6个月前
回复于
喷气推进
内容:两级的尾翼在分离前构成一个较大的整体,以保证低速下的稳定性。
新人的第一枚火箭和研发过程中的一下问题
TonyStark
1年11个月前
回复于
喷气推进
内容:做几批次少量KNSB点点看,把技术和燃烧都控制稳定了就能上32内径技术机了(金属机设计还是需要找佬检查一下的)2、火箭设计有较大问题。
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