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麻烦帮我算一下三年利润平均增长率！万分感谢～
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在线时间 小时
& & & & & & & &
三年利润平均增长率=〔（年末利润总额/三年前年末利润总额）-1〕1/3×100%
& && && &年末利润总额=357万元，& &&&三年前年末利润总额=24万
麻烦高手帮我在EXCEL中设一下公式，因为1/3次方我不会算，最好细一些，拜托了！
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在线时间 小时
a2=POWER(((A1/B1)-1),1/3)
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谢谢你，能告诉我得数吗？::L
阅读权限95
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原帖由 btgy5678 于
19:21 发表
谢谢你，能告诉我得数吗？::L
公式输入单元格不就知道了?
玩命加载中，请稍候
玩命加载中，请稍候
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本论坛言论纯属发表者个人意见，任何违反国家相关法律的言论，本站将协助国家相关部门追究发言者责任！ & & 本站特聘法律顾问：徐怀玉律师 李志群律师弹簧重量如何计算给你一个弹簧,如何计算它的质量,请教专业人士谢谢,应该有公式,麻烦详细说明,....M=ρn(D-d)(π^2)[(d/2)^2] 能举例说明吗?谢谢
丶??茸0082
将弹簧竖直放在水平面上,上面压一个质量为M的物块,记录弹簧压缩了多少(长度A),再将弹簧竖直悬挂,下面挂一个质量为M的物块,记录弹簧伸长了多少(长度B),测定了弹簧的弹力指数K,弹簧质量m=K(B-A)/g,g为重力加速度,以上数据要求精确,测定皆在不超出弹簧弹性形变范围的前提下进行.(弹力指数K,K=F/X,数值上等于弹簧伸长1米时弹簧的弹力)...
1、测量弹簧的簧丝直径d；2、测量弹簧外径D；3、数出弹簧圈数n；4、根据弹簧材质，查出弹簧的比重ρ；弹簧的质量M为：M=ρn(D-d)(π^2)[(d/2)^2]在计算时要注意量纲的统一。补充***：我已经在发给你的信息里举了例子。
计算?弹簧都到手了,直接用天平称不就得了.公式,基本上没用.虽然手册上有,但是那是理论上的.实际不可能算的准的.虽然中间工作部分可以很好的套用公式,但2边压紧边,过渡圈什么的很难在公式里处理的好.
为您推荐：
扫描下载二维码感觉有点问题，
会看斯派克李的大神麻烦帮我看下，感谢。
21回复 154浏览
需要补哪里图的麻烦说下，马上补 & &在线等。
@ @ @ @ @ @ @ @ @ @ @ @ @ @ @ @ @ @ @ @ @ @ @ @ @ @ @ @ @ @ @ @ @ @ @ @ @ @@@@@@@ @@ @ @ @ @ @ @ @ @ @ @ @@ @ @ @ @ @ @ @ @ @ @ @ @ @ @ @ @@ @ @ @ @ @ @ @ @ @w9 uhajiang @ @ @ @@@ @@ @ @ @ @ @ @ @ @ @ @ @ @ @ @ @ @ @ @ @@ @ @ @ @ @ @ @ @ @ @ @ @ @ @ @ @ @ @ @ @ @ @ @ @ @ @ @ @ @ @ @ @ @ @ @ @ @ @ @ @ @ @ @ @ @ @ @ @ @ @ @ @ @ @ @ @ @ @ @ @ @ @ @ @ @ @ @ @ @ @ @ @ @ @ @ @ @ @ @ @ @ @ @ @@ @ @ @ @ @ @ @ @ @ @ @ @ @ @ @ @ @ @ @ @ @ @ @ @ @ @ @ @ @ @ @ @ @ @ @ @ @ @ @ @ @ @ @ @ @ @ @ @ @ @ @ @ @ @ @ @ @ @ @ @ @ @ @ @ @ @ @ @ @ @ @ @ @ @ @ @@ @ @ @ @ @ 劳烦各位大神了 @ @ @ @ @ @ @ @ @ @ @ @ @ @ @ @ @ @ @ @ @ @ @ @ @ @ @ @ @ @ @ @ @ @ @ @ @ @ @ @ @ @ @ @ @ @ @ @ @ @ @ @ @ @ @ @ @ @ @ @ @ @ @ @ @ @ @ @ @ @ @ @ @ @ @ @ @ @ @ @ @ @ @ @ @ @ @ @ @ @ @@ @ @ @ @@ @ @ @ @ @ @ @ @ @ @ @@ @ @ @ @ @ @ @ @ @ @ @ @ @ r @ @ @ @ @ @ 神崎-竹影 @ @ @ @ @ @ @ @ @ @ @ @ @ @ @ @ @ @ @ @ @ @ @ @ @ @ @ @ @ @ @ @ @ @ @ @ @ @ @ @@ @ @ @ @ @我爱折@ @ @nigel2009扣鞋 @ @ @ @ @ @ @ @ @ @ @ @ @ @ @ @ @ @ @ @ @ @ @ @ @ @ @ @ @ @ @ @ @ @ @ @ @ @ @ @ @ @ @@@ @ @ @ @ @ @@ @ @ @ @ @ @ @ @ @ @ @ @ @ @ @ @ @ @ @ @ @ @ @ @ @ @ @ @ @ @ @ @ @ @ @ @ @ @ @ @ @ @ @ @ @ @ @ @ @ @ @ @ @ @ @ @ @ @ @ @ @ @ @ @ @ @ @ @ @ @ @ @ @ @ @ @ @ @ @ @ @
@ @ @ @ @ @ @ @ @
@ @ @ @ @ @
@ @ 谢谢各位了！！！很着急
@@@ @ @ @@ @ @ Aaron... @ @ @ @ @ @ @ @ @ @ @ @ @ @ @ @ @ @ @ @ @ @ @ @ @ @ @ @ @ @ @ @ @ @ @ @ @ @ @ @ @ @ @ @ @ @@@@@@@@@@@@@ @ @ @ @ @ @ @ @@ @ @ @ @ @ @ @ @ @ @ @ @ @ @ @ @ @ @ @ @ @ @ @ @ @ @ @ @ @ @ @ @ @ @ @ @ @ @ @ @ @ @ @ @ @ @ @ @ @ @ @ @ @ @ @ @ @ @ @ @ @ @ @ @ @ @ @ @ @ @ @ @ @ @ @ @ @ @ @ @ @ @ @ @ @ @ @ @ @ @ @ @ @@ @ @ @ @ @ @ @ @ @ @ @ @ @ @ @ @ @ @ @ @ @ @ @ @ @ @ @ @ @ @ @ @ @ @ @ @ @ @ @ @ @ @ @ @ @@ @ @ @ @ @ @ @ @ @ @ @ @ @ @ @ @ @ @@ @ @ @ @ @ @ @ @ @ @ @ @ @ @ @@ @ @ @ @ @ @ @ @ @ @ @ @ @ @ r @ @ @ @ @ @ @ @ @ @ @ @ 神崎-竹影 @ @ @ @ @@ @ @ @ @ @ @ @ @ @ @ @ @ @ @ @ @ @ @ @ @ @ @ @ @ @ @ @ @ @ @ @ @ @ @ @ @@ @ @ @ @ @我爱折@ @ @nigel2009扣鞋 @ @ @ @ @ @ @ @ @ @ @ @ @ @ @ @ @ @ @ @ @ @ @ @ @ @ @ @ @ @ @ @ @ @ @
火柴天 (17级)
16:42 亮了(0) 我要赞助 举报 只看此人 修改 引用 2楼
@ @ @ @ @ @ @ @ @ @ @ @ @ @ @ @ @ @ @ @ @ @ @ @ @ @@ @ @ @ @ @ @ @ @ @ @ @ @ @ @ @ @ @ @ @ @ @ @ @ @ @ @ @ @ @ @ @ @ @ @ @ @ @ @ @ @ @ @ @ @ @ @ @ @ @@ @ @ @ @ @ @ @ @ @@ @ @ @ @ @ @ @ @@ @ @ @ @ @ @ @ @ @@ @ @ @ @ @ @ @ @ @ @ @ @ @ @ @ @@ @@ @ @ @ @ @ @ @ @ @ @ @ @ @ @ @ @@ @ @ @ @ @ @ @ @ @ @ @ @ @ @ @@ @ @ @ @ @ @ @ @ @ @ @ @ @ @ r @ @@ @ @ @ @ @ @ @ @ @ 神崎-竹影 @ @ @ @ @@ @ @ @ @ @@ @ @ @ @ @ @ @ @ @ @ @ @ @ @ @ @ @ @ @ @ @ @ @ @ @ @ @ @ @ @@ @ @ @ @ @我爱折@ @ @nigel2009扣鞋 @ @ @ @ @ @ @ @ @@ @ @ @ @ @ @ @ @ @ @ @ @ @ @ @ @ @ @ @ @ @ @ @ @ @ @ @ @@ @ @ @ @ @@ @ @ @@ @ @@ @ @ @ @ @@ @ @ @ @ @ @ @ @@ @ @ @ @ @ @ @ @ @@ @ @ @ @ @ @ @ @ @ @ @
如需补图的话我马上补
假的！！！
急需鉴定加微博 //profile?topnav=1&wvr=6
最近拼图鉴定的很多，请按要求把图上全
假了。。。。。。。
Andrea Pirlo/Tracy McGrady
引用3楼 @ 发表的:
假的！！！
感谢。。
引用4楼 @ 发表的:
假了。。。。。。。
感谢。
为方便鉴定说明如下：
1.基本用IPAD HD客户端，请帖子里@，短信留言板看了回不了帖。
等级不够的可以加【微信;】，验证说清楚来历，批量验货、试货狗 请绕道，不定时登陆回复。
引用7楼 @ 发表的:
假
引用1楼 @ 发表的:@ @ @ @ @ @ @ @ @ @ @ @ @ @ @ @ @ @ @ @ @ @ @ @ @ @ @ @ @ @ @ @ @ @ @ @ @ @@@@@@@ @@ @ @ @ @ @ @ @ @ @ @ @@ @ @ @ @ @ @ @ @ @ @ @ @ @ @ @ @@ @ @ @ @ @ @ @ @ @w9 uhajiang @ @ @ @@@ @@ @ @ @ @ @ @ @ @ @ @ @ @ @ @ @ @ @ @ @@ @ @ @ @ @ @ @ @ @ @ @ @ @ @ @ @ @ @ @ @ @ @ @ @ @ @ @ @ @ @ @ @ @ @ @ @ @ @ @ @ @ @ @ @ @ @ @ @ @ @ @ @ @ @ @ @ @ @ @ @ @ @ @ @ @ @ @ @ @ @ @ @ @ @ @ @ @ @ @ @ @ @ @ @@ @ @ @ @ @ @ @ @ @ @ @ @ @ @ @ @ @ @ @ @ @ @ @ @ @ @ @ @ @ @ @ @ @ @ @ @ @ @ @ @ @ @ @ @ @ @ @ @ @ @ @ @ @ @ @ @ @ @ @ @ @ @ @ @ @ @ @ @ @ @ @ @ @ @ @ @@ @ @ @ @ @ 劳烦各位大神了 @ @ @ @ @ @ @ @ @ @ @ @ @ @ @ @ @ @ @ @ @ @ @ @ @ @ @ @ @ @ @ @ @ @ @ @ @ @ @ @ @ @ @ @ @ @ @ @ @ @ @ @ @ @ @ @ @ @ @ @ @ @ @ @ @ @ @ @ @ @ @ @ @ @ @ @ @ @ @ @ @ @ @ @ @ @ @ @ @ @ @@ @ @ @ @@ @ @ @ @ @ @ @ @ @ @ @@ @ @ @ @ @ @ @ @ @ @ @ @ @ r @ @ @ @ @ @ 神崎-竹影 @ @ @ @ @ @ @ @ @ @ @ @ @ @ @ @ @ @ @ @ @ @ @ @ @ @ @ @ @ @ @ @ @ @ @ @ @ @ @ @@ @ @ @ @ @我爱折@ @ @nigel2009扣鞋 @ @ @ @ @ @ @ @ @ @ @ @ @ @ @ @ @ @ @ @ @ @ @ @ @ @ @ @ @ @ @ @ @ @ @ @ @ @ @ @ @ @ @@@ @ @ @ @ @ @@ @ @ @ @ @ @ @ @ @ @ @ @ @ @ @ @ @ @ @ @ @ @ @ @ @ @ @ @ @ @ @ @ @ @ @ @ @ @ @ @ @ @ @ @ @ @ @ @ @ @ @ @ @ @ @ @ @ @ @ @ @ @ @ @ @ @ @ @ @ @ @ @ @ @ @ @ @ @ @ @ @
@ @ @ @ @ @ @ @ @
@ @ @ @ @ @
@ @ 谢谢各位了！！！很着急
@@@ @ @ @@ @ @ Aaron... @ @ @ @ @ @ @ @ @ @ @ @ @ @ @ @ @ @ @ @ @ @ @ @ @ @ @ @ @ @ @ @ @ @ @ @ @ @ @ @ @ @ @ @ @ @@@@@@@@@@@@@ @ @ @ @ @ @ @ @@ @ @ @ @ @ @ @ @ @ @ @ @ @ @ @ @ @ @ @ @ @ @ @ @ @ @ @ @ @ @ @ @ @ @ @ @ @ @ @ @ @ @ @ @ @ @ @ @ @ @ @ @ @ @ @ @ @ @ @ @ @ @ @ @ @ @ @ @ @ @ @ @ @ @ @ @ @ @ @ @ @ @ @ @ @ @ @ @ @ @ @ @ @@ @ @ @ @ @ @ @ @ @ @ @ @ @ @ @ @ @ @ @ @ @ @ @ @ @ @ @ @ @ @ @ @ @ @ @ @ @ @ @ @ @ @ @ @ @@ @ @ @ @ @ @ @ @ @ @ @ @ @ @ @ @ @ @@ @ @ @ @ @ @ @ @ @ @ @ @ @ @ @@ @ @ @ @ @ @ @ @ @ @ @ @ @ @ r @ @ @ @ @ @ @ @ @ @ @ @ 神崎-竹影 @ @ @ @ @@ @ @ @ @ @ @ @ @ @ @ @ @ @ @ @ @ @ @ @ @ @ @ @ @ @ @ @ @ @ @ @ @ @ @ @ @@ @ @ @ @ @我爱折@ @ @nigel2009扣鞋 @ @ @ @ @ @ @ @ @ @ @ @ @ @ @ @ @ @ @ @ @ @ @ @ @ @ @ @ @ @ @ @ @ @ @
火柴天 (17级)
16:42 亮了(0) 我要赞助 举报 只看此人 修改 引用 2楼
@ @ @ @ @ @ @ @ @ @ @ @ @ @ @ @ @ @ @ @ @ @ @ @ @ @@ @ @ @ @ @ @ @ @ @ @ @ @ @ @ @ @ @ @ @ @ @ @ @ @ @ @ @ @ @ @ @ @ @ @ @ @ @ @ @ @ @ @ @ @ @ @ @ @ @@ @ @ @ @ @ @ @ @ @@ @ @ @ @ @ @ @ @@ @ @ @ @ @ @ @ @ @@ @ @ @ @ @ @ @ @ @ @ @ @ @ @ @ @@ @@ @ @ @ @ @ @ @ @ @ @ @ @ @ @ @ @@ @ @ @ @ @ @ @ @ @ @ @ @ @ @ @@ @ @ @ @ @ @ @ @ @ @ @ @ @ @ r @ @@ @ @ @ @ @ @ @ @ @ 神崎-竹影 @ @ @ @ @@ @ @ @ @ @@ @ @ @ @ @ @ @ @ @ @ @ @ @ @ @ @ @ @ @ @ @ @ @ @ @ @ @ @ @ @@ @ @ @ @ @我爱折@ @ @nigel2009扣鞋 @ @ @ @ @ @ @ @ @@ @ @ @ @ @ @ @ @ @ @ @ @ @ @ @ @ @ @ @ @ @ @ @ @ @ @ @ @@ @ @ @ @ @@ @ @ @@ @ @@ @ @ @ @ @@ @ @ @ @ @ @ @ @@ @ @ @ @ @ @ @ @ @@ @ @ @ @ @ @ @ @ @ @ @
假………………
万物皆空 因果不空
假!!!!!!!!!!!!!!!!!!!!!!!!!
快速鉴定微信：touzai1
引用9楼 @ 发表的:
假………………
谢谢
引用10楼 @ 发表的:
假!!!!!!!!!!!!!!!!!!!!!!!!!
谢谢
每天看贴无数,基本上不回贴. 后来发现这样很傻, 很多比我注册晚的人财产都比我多, 于是我就把这段文字保存在记事本里, 每看一贴就复制粘贴一次. 顺便帮LZ把贴子顶上去发自手机虎扑
假。。。。。。。。。。。
主流球鞋鉴定加 *河蟹*：a
假............
鉴定非职责
无偿无义务
请互相尊重
鉴定直接开贴上高清细节图@
微信：lccthetruth
店铺连接：/
没猛货只保真
全部公司货
旺旺WEIXIN联系均可
引用11楼 @ 发表的:
谢谢
假………………
万物皆空 因果不空
假。。。。
积极备战马拉松。。。
引用17楼 @ 发表的:
假。。。。
谢谢。
记得粉我，做我的粉丝吧
新浪微博：独孤冰颜
假。。。。
需要帮忙看鞋的朋友，补图可参照如下；
鞋盒部分：侧标 合格证 钢印
鞋子部分：鞋标 品牌logo 鞋头 鞋垫背面 中底
（个别款需要另补图，在回复中会尽量说明）
等级不够的朋友可以加微信（wgh）平常出一些鞋子，有兴趣的可以加我微信。
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& 允许多选
128人参加识货团购318.00元166人参加识货团购149.00元75人参加识货团购438.00元38人参加识货团购128.00元251人参加识货团购2329.00元102人参加识货团购198.00元183人参加识货团购218.00元36人参加识货团购469.00元37人参加识货团购398.00元117人参加识货团购199.00元57人参加识货团购639.00元209人参加识货团购649.00元后使用快捷导航没有帐号？
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自力阀弹簧
收到鲜花 朵
阅读权限40
主题好友积分
签到天数: 154 天连续签到: 1 天[LV.4]海川常住居民I&
如图片，阀塞圆圈处弹簧的作用是什么？我知道上面弹簧是设定压力，弹簧力控制阀门开关，那下面的阀簧起什么作用，不明白，求专业人士解答，不胜感激！
本帖子中包含更多资源
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收到鲜花 朵
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主题好友积分
签到天数: 606 天连续签到: 12 天[LV.6]海川常住居民III&
本帖最后由 fengxiaosa 于
21:51 编辑
下方的这个弹簧的主要作用，是减小变差，提高上方执行机构的动作精度。
阀杆的位置是由上方执行机构中介质在膜片上的作用力和弹簧作用力，以及阀芯-阀杆作用力这三者决定的。
MR108的阀芯是套筒结构，下图是一个套筒阀芯示意
这种结构的优点之一是阀杆需要的推力很小。带来的一个问题是静止时阀杆理论上没有径向受力。阀杆在运动中会受到推，拉两个方向的力。
这就造成执行机构平衡位置在两个运动方向上有一个影响因素（阀杆作用力）的方向不同，造成同样介质压力下，阀杆上行和下行的平衡位置不同（变差）。
加上这个弹簧，并使这个弹簧的力大于大于阀杆推，拉两个方向的力。就使得影响执行机构平衡位置中的阀杆力，在上下行时方向一致。而且以弹簧力为主，推，拉个方向的力影响降到最低，达到减小变差，提高调整精度的目的。
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