o******s 发帖数: 1364 | 1 Is there right helical vanes available to go with right helical clamps or is
it just feathers?
I'm trying to refletch some of my arrows with helicals.
Thanks! |
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h**********a 发帖数: 72 | 2 紧急求助,谁知道做helical tomotherapy system要多少钱?哪有网络链接可以查询,
谢谢 |
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h**********a 发帖数: 72 | 3 紧急求助,谁知道做helical tomotherapy system要多少钱?哪有网络链接可以查询,
谢谢 |
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h**********a 发帖数: 72 | 4 紧急求助,谁知道做helical tomotherapy system要多少钱?哪有网络链接可以查询,
谢谢 |
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s******9 发帖数: 283 | 5 NCBI protein database一般都有标注吧。
FEATURES Location/Qualifiers
source 1..503
/organism="Homo sapiens"
/db_xref="taxon:9606"
gene 1..503
/gene="TGFBR1"
/gene_synonym="ALK5"
/gene_synonym="SKR4"
Protein 1..503
/gene="TGFBR1"
/gene_synonym="ALK5"
/gene_synonym="SKR4"
... 阅读全帖 |
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s*******7 发帖数: 399 | 6 这个问题很好,因为这是离子通道voltage-sensing争来争去迄今尚无定论的地方。
先说题外话啊,哈哈。说到电生理,其实就是研究生物体如何把电信号转化为生理反应
。而电压依赖性离子通道(VGIC)是这个领域的研究热点之一,这个热点的核心又是
VGIC通道如何通过电压敏感区域(VSD)感受电压,VSD感受电压后又如何调控通道开放
?一句话,当外面来了电压,VSD在细胞膜间怎么运动?
在钾通道VSD结构没解析出来,有几种模型被提出来。
代表性的有2种:一种就是细胞膜相对静止,VSD的S4直上直下,即helical screw。另
一种VSD的S4相对静止,细胞膜直上直下,叫moving orifice。
这时期代表人物很多,我只记得Isacoff和Horn。Isacoff要提一下,一方面他是Lily
Jan的学生,另一方面他同时也是最早研制出TIRF的前沿人物之一。犹太人,很聪明。
如今研究VSD这一块实验室虽然很多,但基本上就出自几个大家族,诸如Miller C,
Lily,Catterall, Armstrong等。Mackinnon虽然名气大,但他和Yellen都出自Mille... 阅读全帖 |
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c******n 发帖数: 4965 | 7 rangefinder 不准,
就按kiev survival site 上,
先试简单的办法, 不管用,
然后就先拆film plane casting,
然后top casting
然后shutter assembly,
lens helical
lens helical 下来以后, rangefinder 跟lens 就没有couple 了,
找infinity 一对,再把helical 转到infinity, 插回到mount 里,rangefinder
infinity
就好了, 拧死螺丝。然后对0.9米,perfect. 这就完事了。
然后一一装回去-----中间还给各个部分都上了些white lithium grease,
后来发现其实要卸lens helical 很容易, 把面板去掉,然后直接卸掉flange plate
的4个螺钉就可以了。shutter assembly 和top casting 根本不用动。
kiev4 不爽的是, shutter assembly 出来一根flash sync 电线,焊在PC sync
socket 上,
要卸shutter 的话 |
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l**********1 发帖数: 5204 | 8 Continue:
DNA original model might was within
//www.chambord.org/Chambord-fr-idm-98-n-Les_espaces_de_location.html
by Leonardo da Vinci his life last years works.
Leonardo da Vinci at Le Clos Lucé (1516-1519)
In 1515, Francis I won the Milan area in the battle of Marignan, and invited Leonardo to come to France. The
following year, the artist arrived at the Chateau du Clos Lucé after a journey across the Alps on mule-back.
He brought with him three paintings: the Mona Lisa, Saint John the Bapt... 阅读全帖 |
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c*******9 发帖数: 9032 | 9 Summation of Tesla's Dynamic Theory of Gravity
An excerpt from: Occult Ether Physics
by William R. Lyne
From: Don Allen
d**[email protected]
According to Tesla's lecture prepared for the Institute of Immigrant Welfare
(May. 12, 1938), his "Dynamic Theory of Gravity" was one of two far
reaching discoveries, which he "...worked out in all details", in the years
1893 and 1894. The 1938 lecture was less than five years before his death.
More complete statements concerning these discoveries can ... 阅读全帖 |
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r********a 发帖数: 139 | 10 你是对的,我被rx8论坛上的那些讨论误导了。。。>.< 有人说他的rx8用的是
GNK super LSD,是helical的. 如果是helical的,那么肯定是torsen类型的。
在GNK自己的网站上,区分了super LSD和helical LSD,那么前者就只能是cone cluch的了,开发两套torsen-type没有意义。
不过,torque-sensing cluch LSD不意味着会带来understeering, 同样torsen type LSD也不表示可以减小understeering. torque sensing LSD用在前驱车上的目的是为了在加速的时候消除power steering,或者说为了更好的出弯,而不是为了帮助入弯。
其实恰好相反,入弯的时候前驱车反而怕LSD起作用,如果diff被limited了,understeering只会更加严重。有一类比较极端的clutch LSD(通常是aftermarket,给那些玩power drift的人用的)可以在入弯的时候起作用,如果用在FWD车上,会增加understeering,这可能是你说speed |
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z**********e 发帖数: 22064 | 11 Helical Magazines
Helical Magazines Used in Various Firearms.
An ordinary double stack magazine.
The transformation begins.
A closer look at the Calico.
A closer look at the Bizon. |
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V***b 发帖数: 3419 | 12 EVO中差是bevel gear,动力分配50-50,电控离合控制锁定百分比,这个中差叫Active
Center Differential (ACD);前差是helical gear,开放;后差是也是helical gear
,但通过planetary gearset实现torque vectoring,整个后差叫Active Yaw Control
(AYC);而且ACD和AYC还和Active Stability Control (ASC)还有ABS整合,整个系统叫
Super All Wheel Control (S-AWC).
GT-R (R35)的四驱系统叫ATTESA E-TS,全名Advanced Total Traction Engineering
System for All-Terrain Electronic Torque Split. 中差用multi-plate clutches代
替,正常驾驶只有2%动力送到前轴,驾驶感还是后驱;弯道电脑通过yaw sensor/ABS
sensors决定有多少动力送到前面,取决于某瞬间车辆是否需要抵消oversteeri... 阅读全帖 |
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g********d 发帖数: 19244 | 13 ☆─────────────────────────────────────☆
stirling (stirling) 于 (Wed Jun 26 04:07:44 2013, 美东) 提到:
在板上车深度试驾评测的热潮中,本wsn也经不住诱惑yy租了一回正牌车里的正牌车。
做到驾驶座上豪华气质扑面而来。咦,怎么觉得右腿碰到了什么东西,原来座位下面有
个包。不会吧,难道是transmission tunnel 设计小了东西放不下后来又打了补丁?正
牌车真么可能有这种情况,一定是自己的问题,不是腿太长就是腿太短,要不一定要X
型腿才配的上这车。
☆─────────────────────────────────────☆
theislander3 (Peace de Wars) 于 (Wed Jun 26 10:43:12 2013, 美东) 提到:
座椅推到最后面是这样?
☆─────────────────────────────────────☆
AAman (愤怒的生物博士后) 于 (Wed Jun 26 11:50:05 2013, 美东) 提到... 阅读全帖 |
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e*****n 发帖数: 124 | 14 看了不少房子了,眼看着房价在逐渐走高,也没有看到中意的,稍微中意的还没有看到
就有多个offer了。
最近新出来一个房子,价格合理,位置不错,看过了户型结构也满意。只是看到zillow
上咋个房子上半年卖过一次,然后又撤了,过了四个月才又出来卖。让agent帮忙查一
下背景。
Agent动作很快。原来上次有过offer,结果inspection 发现structural的问题,就撤了
。房主这几个月把上次查出的问题进行了structural repair,并由同一个inspector出
具了一个报告,说明上次的问题已经解决,所以又可以上市了。我们自己看不出问题,
报告上的术语也是大概猜测,有懂行的帮忙看一下吧
Construction Observation Report
On x.X 2012, I inspected the structural repairs at the above referenced
property. The purpose of the inspection was to observe the exposed
counterfor, in order... 阅读全帖 |
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t**d 发帖数: 6474 | 15 这两种都不好。pressing pier桩还有可能往下走,除非桩已经达到岩床了。做好的使
用helical piers,大螺旋往地下钻,钻到岩床或者力钻到量达到标准。helical piers
还能把下沉了的地基抬起来。 |
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s**********s 发帖数: 7387 | 16 depending on the helical grease used in the lense. if the grease is too
heavy, tabs are not easy to use.
i find leica/voigtlander tabs are very comfortable to use, while ZM lense
use heavy helical grease and i prefer focusing them with the focusing ring
instead.
给手 |
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T*********r 发帖数: 11175 | 17 这当然是实验如此后来才有理论
实验只观测到了在charged current上有flavor violation
然后才有GIM
根据GIM,gauge basis和mass basis间是个unitary rotation
比如UL UR 分别对左旋和右旋
质量项是flip helicity的,通过UL^\dagger M UR,来做mass diagonalization
规范相互作用是不flip helicity的,所以应该写成 UL^\dagger GL UL,UR^\dagger GR
UR
universal gauge interaction(没有flavor dependent的)
写在horizontal space(flavor basis)里那个GL,GR就是个identity matrix
这样就没有flavor changing
charged current是u d分别对应两个lefthanded rotation,也就得出了ckm
另外对qcd这样的vector interaction来说,左右手是对称的
UL^\dagger I UL+UR^\dagge |
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b***p 发帖数: 1398 | 18 IF this issue would incur some level of risk or complication in the future,
another ASTM with minimum longitudinal resistance requirement might be
needed.
I quickly check their design, the low stress resistance against longitudinal
stretching or collapsing seems to be resulted from short segment design and
two helical connectors. With improved flexibility, they might sacrifice
too much strength (both longitudinal and torsional).
Would three-helical-connectors be possible?
is |
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c*********r 发帖数: 19468 | 19 Evo进入美国市场就是从8代开始的,之前美国没有Evo卖
第一年的美规Evo是彻底阉割的,中差没有ACD,是粘性LSD,没有helical前差,也没有
AYC后差
第二年加上了helical前差,但ACD和AYC还是没有,但美规Evo VIII MR开始加上了ACD
到了9代美规Evo就全部用上了ACD了,只是AYC一直没有,直到Evo X才加上
Evo X之前引擎也和日规差很多……
Subaru也是类似啊,美规技术含量比日规差了不少,很多好东西都没来
大概日本人觉得老美都是大老粗不需要这些fancy的玩意吧…… |
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c*********r 发帖数: 19468 | 20 你可知道Torsen A和Torsen B根本是风马牛不相及吗?前者基于worm gear,后者基于
helical gear……用在驱动轴Torsen B是更合适的,而类似的helical gear LSD本来就
多得是,比如Quaife什么的……所以你的问题本来就no point…… |
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c*********r 发帖数: 19468 | 21 咣当~~~%lock和torque bias ratio是可以相互换算的量,哪怕open diff你也可以
说它是%lock为0
%lock=torque difference/total torque*100%
假如一个Torsen能做到5:1的torque bias ratio,那%lock就是66.7%
任何类型的LSD如果%lock<100%,那么一侧车轮悬空的话和Torsen也是一样,都会实效的
实际上常用的机械LSD,大部分也就是25-45%lock,还不如Torsen了
只不过机械LSD有做到100%的可能性,Torsen没有……
Torsen最大的好处说到底就是它的性质对于不同的扭矩转递方向是完全不同的
对于从车轮传回的扭矩它就是open diff,对于传向车轮的扭矩,它是torque-sensing
的proactive系统
所以它能在防滑的同时却不影响转向
以前也讲过很多次了,类似的torque-biasing机制有很多种,实际上即便是Torsen,
type A和type B/C也完全不同了
基于worm gear的Torsen A其实很少用在驱动桥,用得较多的是... 阅读全帖 |
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D*****i 发帖数: 8922 | 22
我说越远古越详细,就是指远古神话很详细,但伯罗奔尼撒战争却根本没有提。请看最早
的原帖。现在我的观点没变。
看帕罗斯碑全文有啥,给你贴一个。
我 [1]依据各类官方文献和通行的历史著作, 编辑了这份自远古以来的年表,从雅典的
第一位巴西勒斯 (basileus)[2] 凯克罗普斯(Cecrops), 至帕罗斯执政官(阿斯提)安
那克斯(Astyanax )和雅典执政官丢格奈托斯(Diognetos)之年 [3] 。
公元前
264/3
1
距今 1318 年, 凯克罗普斯[4] 为雅典的巴西勒斯, 这地方因之名为凯克罗匹亚(
Cecropia), 此地以前依土著阿克塔攸斯(Actaios)[5] 之名而名为阿克蒂凯(Actice)。
1582/1
2
距今 1310 年, 凯克罗普斯为雅典的巴西勒斯, 丢卡利翁 (Ducalion)[6] 在帕那索斯
山(Parnassos)麓的吕克里亚(Leucoreia)为巴西勒斯。
1574
3
距今 1268 年, 克拉那奥斯(Cranaos)为雅典的巴西勒斯, 阿瑞斯(Ares)[7] 和波赛冬(
Poseidon)[8] 因波赛冬... 阅读全帖 |
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m****s 发帖数: 443 | 23 Franklin is best known for her work on the X-ray diffraction images of DNA,
which led to the discovery of the DNA double helix. According to Francis
Crick, her data and research were key in determining the structure[3] and
formulating Crick and James Watson's 1953 model regarding the structure of
DNA.[4] Franklin's images of X-ray diffraction, confirming the helical
structure of DNA, were shown to Watson without her approval or knowledge.
This image provided valuable insight into the DNA structu... 阅读全帖 |
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c*********d 发帖数: 9770 | 24 【弹匣篇《二》】关于子弹方面的东西你们了解多少?【极限军事科普】
128 回复,共1页,转到页跳页.
极限军事俱乐部
UP主
2017年12月22日 20:45:48
写干货给军迷朋友们看是一个军事原创号最大的使命
为了保证原创质量的稳定性
我们将只能不固定时间更新,还请广大极限朋友谅解哈
很多一直在等子弹篇更新的朋友可能都会觉得奇怪,为什么我们从定装弹开篇聊着聊着
聊出了很多各种各样的周边内容。
原因其实有很多,因为我们重新修改了子弹系列的写作大纲,我们认为子弹系列就应该
像一棵树一样,从根开始慢慢往上,随着躯干的成长,也引发出各种各样的分枝。等最
后讲到树冠的时候,大家就会发现其实前面的所有内容都是有营养和有作用的。
之前在《一》篇已经跟大家聊了弹匣、弹夹、管式弹仓、弹鼓等各种内容,那么大家一
定会很好奇,在《二》、《三》和《四》里我又会给大家介绍些什么呢?
因为是科普类文章,所以在措辞上我会尽量通俗易懂一些,职业军迷们也请多多理解一
下哈。在本篇的结尾我也会和大家多聊几句,我们现在先从今天的正片开始看起吧:
上下滑动可以阅读更多文字内容
弹盘(pan magazine)有时又称为... 阅读全帖 |
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发帖数: 1 | 25 http://theprepared.com/blog/no-the-2019-ncov-genome-doesnt-actually-seem-engineered-from-hiv/
2019-nCoV genome doesn’t really seem engineered from HIV
A group of bioinformaticians at two prestigious universities in Delhi, India
, published a preprint scientific manuscript on the bioRxiv preprint server
Friday has led many to speculate wildly that 2019-nCoV may have been
deliberately engineered using HIV protein sequences.
The paper, entitled “Uncanny similarity of unique inserts in the 2019-nCoV... 阅读全帖 |
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T****r 发帖数: 22092 | 26 U.S. Flights Over Plant Gather Crucial Data
By DAVID E. SANGER and WILLIAM J. BROAD
Published: March 17, 2011
http://www.nytimes.com/2011/03/18/world/asia/18intel.html?_r=1&
WASHINGTON — The first readings from American data-collection flights o
ver the stricken Fukushima nuclear plant in Japan show that the worst of
the contamination has not spewed beyond the 18-mile range of highest co
ncern established by Japanese authorities, but there is also no indicati
on that another day of frantic effor... 阅读全帖 |
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j*******n 发帖数: 10868 | 27 http://legacygt.com/forums/showthread.php/explanation-continuou
There is a lot of confusion about the differences between the various Subaru
AWD systems:
Continuous (for 5MT)
Active (for 4EAT)
VTD (for 5EAT)
availability or non-availability of Rear LSD
So heres an attempt to explain the differences....
1. Continuous AWD System:
The manual transmission’s all-wheel drive is referred to as a continuous
all-wheel drive system. It uses a center differential located inside the
transmission case that i... 阅读全帖 |
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r********r 发帖数: 60 | 28 不是,GT track package是指Brembo brake pkg, TORSEN 3.73 helical differential
rear axle, Boss 302 radiator, engine oil cooler, tire mobility kit. 你都要
了什么option? 能透露一下最后多少拿下的么?多谢了! |
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y*****c 发帖数: 1099 | 29 版上有开12年si的吗 或者其他类似手挡车的
想问问大家都是多少转或者多少速度的时候一档换二档
Shift Up Normal Acceleration RPM (nearest 100)
1st > 2nd 17 mph (27 km/h) 3600
2nd > 3rd 29 mph (46 km/h) 3800
3rd > 4th 37 mph (59 km/h) 3400
4th > 5th 43 mph (69 km/h) 3000
5th > 6th 49 mph (79 km/h) 2600
Here are the RPM shift points based on Honda's recommended MPH shift points
for the 2012 Civic Si
但是如果我按上面这个或者比较高转速换二档 车经常要前后晃两下
开了三个月了 不知道是不是还是练得不够 如果一档起来马上换二档就好很多
你们一般都是什么时候换二档
或者如果转速比较高的话换二档有什么诀窍防止车晃么 我已经很注意在半离合的点停
一下 然后慢慢放离合 同时补一点油 但还是晃 都尼玛把... 阅读全帖 |
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l*x 发帖数: 396 | 30 electromagnetic multi-plate clutches和差速锁各有优势,不能说multi-
plate clutches比传统的差速锁更好。multi-plate clutches做为主动式torque分配,
可以提前预防打滑。但是路面复杂,真出现打滑时,纯机械的中差反应更直接迅速。
所以performance oriented四驱,比如WRX STI,同时装有electromagnetic multi-
plate transfer clutches和planetary type limited slip center differential。
STI还有前后轴(Helical和Torsen)limited slip differential,加torque
vectoring。纯论高性能四驱,sh awd根本算不上是最优秀的。 |
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B*Z 发帖数: 7062 | 31 主要说的是中央差速器。这个是网上一个文章。附件是现在的subaru中央差速器分类。
There is a lot of confusion about the differences between the various Subaru
AWD systems:
? Continuous (for 5MT)
? Active (for 4EAT)
? VTD (for 5EAT)
? availability or non-availability of Rear LSD
So heres an attempt to explain the differences....
1. Continuous AWD System:
The manual transmission’s all-wheel drive is referred to as a continuous al
l-wheel drive system. It uses a center differential located inside the trans
mission... 阅读全帖 |
|
f****y 发帖数: 737 | 32 请大家想一想,英语是谁发明的?英国人呗!
英国人认不认识汉语?不认识!
那么英国人在学英语单词的时候需不需要记住单词的汉语意思?不需要,英国人的英语
课本里根本就没有汉字,何谈记住单词的汉语意思?
那么既然英国人学英语不需要记住(甚至根本就见不到)单词的汉语意思,那么中国人学
英语为什么要去记住单词的汉语意思呢?这种做法大家不觉得奇怪吗?
然而由于中国人学英语时都在背单词的汉语意思,因此大家反而觉不出“背汉字”有什
么奇怪的了。
其实仔细想一想,这个行为真的很奇怪,奇怪的根源不在于行为本身,而在于中国人普
遍不会直接识别英语单词的意思,因而只好靠汉语符号来机械地帮助记忆英语单词的意
思,这样去学英语不仅多此一举,而且必然会陷入苦海无边的符号记忆灾难中。
其实英语单词和汉字一样,存在着很多的“偏旁部首”,知道了偏旁部首你就可以根据
它们直接来猜测单词的意思,虽不说百分之百猜准,但起码可以猜测个大概,至少在别
人告诉过你单词的意思后你可以恍然大悟地领会它,这样就可以大大增强你对英语单词
“见字识意”的能力,做到真正认识一个单词,而把它的汉语意思仅做为一般参考。
举几个例子来说吧:
比如单词... 阅读全帖 |
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a*****0 发帖数: 3319 | 33 多谢。
loan agent真这么说了, buyer agent 还email说只有她这loan agent能这么做。前两
天去sign loan application, loan agent说他没让我们cancel 现住房heloc 申请,我
老公当场就不高兴了,说他真的这么说了, 所以我才cancel 现住房heloc application
. loan agent 说没事, 只是利率会高些, 但他能做到申请要买房的helic。
今天agent 又说是我们之间misunderstanding. 您有什么好主意?我想让他们多修些东
西。appraisal 的comparables 不合理,请问是不是不能改appraisal value了?
多谢。 |
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v*****e 发帖数: 265 | 34 1999年的房子inspection,车库跟主房子attach,车库foundation发现crack,主
房子下面有basement,没有发现异常。图上这个crack位与主房子跟车库交界处下面。
inspector说如果要修理的话插如4跟helical piers就可以。版上有知道吗? |
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o**********e 发帖数: 18403 | 37 来自主题: NextGeneration版 - 谈脐带绕颈 Pregnancy is a scary time, my condolences on the mm who lost her baby at 8
months. So quick wiki:
http://en.wikipedia.org/wiki/Nuchal_cord
Clapp reports that in 60%, or 50 of the 84 fetuses studied, a nuchal cord
was seen on ultrasound at one of the 4 evaluations. He found that the
presence of a nuchal cord linearly increases as the pregnancy continues. See
table below. The presence of nuchal cord rose with advancing gestation.
Larson [8] found this to be true. He found of the 13,895 singleton
... 阅读全帖 |
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s****i 发帖数: 1130 | 38 我也给你一段别人heavily cited的例子,我还把有些不太重要的句子用...隔开,其实
heavily cited多是肯定你的significance或者novality。
Prof. Naik et al.(research leader at Air Force Research Laboratory, Wright-
Patterson Air Force Base, Ohio, USA [Exhibit B.4.2.1]) highlighted and
provided detailed references to my work in their review article (Chem.Rev.).
Furthermore, they dedicated an entirely paragraph to comment my work: "The
triple-helix structure of a recombinant collagen-based protein (F) has also
been explored as a scaffold for the... 阅读全帖 |
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a***o 发帖数: 104 | 39 1. Journal: Materials Science and Engineering C (IF:3.088)
Keywords: liquid crystal; GRGDF modification; osteogenic differentiation.;
cell behavior;
2. Journal: Materials Science and Engineering C (IF:3.088)
Keywords: all ceramics, strain, PMMA;
3. Journal: Materials Science and Engineering C (IF:3.088)
Keywords: Fluorescence; Intercalation; Benzimidazole derivatives;
Antimicrobial activity; DNA helicity.;
请PM你的英文姓名,单位与邮箱以及发表过的相关文章, 我会向编辑推荐,不过不保证
成功率. |
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S*******s 发帖数: 10098 | 40 对!一定找一个看看.
我看见过2次房子地基下陷, 其中一个造成墙面开裂,从天花一直到地板裂成了一个大
“Z”字形,因为房子一头的地下结构是软的, 另一头地下是坚硬的岩层。另一个房子
主人请了结构工程师专门来评估,然后请人在地下室的地基沿着下陷的一面打入
Helical Pier. |
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S*******s 发帖数: 10098 | 41 对!一定找一个看看.
我看见过2次房子地基下陷, 其中一个造成墙面开裂,从天花一直到地板裂成了一个大
“Z”字形,因为房子一头的地下结构是软的, 另一头地下是坚硬的岩层。另一个房子
主人请了结构工程师专门来评估,然后请人在地下室的地基沿着下陷的一面打入
Helical Pier. |
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m*********o 发帖数: 7545 | 42 ☆─────────────────────────────────────☆
liuc (纽约,纽约) 于 (Mon Feb 13 15:35:11 2012, 美东) 提到:
我家一楼地板局部下陷,地下室需要加固。哪位大虾有经验推荐一下? 电话
6464202495,
email: s*********[email protected]
☆─────────────────────────────────────☆
biggorboy (biggorboy) 于 (Mon Feb 13 15:38:33 2012, 美东) 提到:
去home depot 买根柱子就60多, 顶住就好了,是钢的价格,木柱更便宜
☆─────────────────────────────────────☆
liuc (纽约,纽约) 于 (Mon Feb 13 16:23:56 2012, 美东) 提到:
有没有可调高低的钢柱子?像千斤顶那样的?
☆─────────────────────────────────────☆
mrsdonkey (yaya) 于 (Mon F... 阅读全帖 |
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S***A 发帖数: 40 | 43 DATE: Monday, April 7, 2014
TIME:
4:45 PM Registration
5:15 PM Professor Barry M. Trost, Tamaki Professor of Humanities and
Sciences, Stanford University, “The Alkyne Strategy For the Synthesis of
Bioactive Targets”
6:00 PM Networking and light dinner
7:00 PM Dr. Nicholas A. Meanwell, Executive Director, Medicinal
Chemistry, Bristol-Myers Squibb, “The Discovery of HCV NS5A Replication
Complex Inhibitors: Daclatasvir and Synergists”
PLACE: Knobbe ... 阅读全帖 |
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q**u 发帖数: 12289 | 44 "The K31 is a manually operated, straight bull bolt-action rifle. The
rotating bolt has two opposing lugs at the front, which are locking into
the cuts in the receiver ring. The straight pull bolt handle has a large
T-shaped handle and a stud, which enters the helical groove on the bolt
body. When the bolt handle is retracted, the stud first forces the bolt
to rotate and unlock, and then pulls the bolt back for reloading cycle."
其实跟ak的旋转闭锁原理是一样的。你就想像一把ak,减去导气/活塞部分。 |
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f*********n 发帖数: 11154 | 45 Apply coupon "DUT" for $5 Shipping over $125
http://www.brownells.com/rifle-parts/receiver-amp-action-parts/
Complete Top End Includes Barrel, Free-Float Handguard, Bolt & Carrier
Ready to install .308/7.62 NATO upper receiver comes fully assembled with
bolt/carrier, charging handle, free-float handguard, gas block, and barrel.
Lets you change your LR-308 from a sporter to a match rifle or long-range
varminter in just minutes—or build a completely new gun customized to your
exact needs Beefy, th... 阅读全帖 |
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e**********n 发帖数: 359 | 46 螺旋式,helical stroke 或 spin stroke. (I have avoided screwy stroke.) 身体
往顺时针或逆时针方向旋转,自由泳打
腿,自由泳和仰泳划水交替进行,仰泳换气。以前听别人说过,今天自己试了试,想了
想,感觉还是有一定道理的,只是
初学者容易头晕,撞墙,习惯后速度还是挺块的,而且呼吸象仰泳一样轻松而充分。大
家可以讨论讨论。 |
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c******s 发帖数: 5583 | 48
你说的是刚出的时候,04,05出货之后虽然没人搭理这个头,但是卖干净了之后大家才
知道这个头的产量。
转接环早已停产, 现在市价$500-800。 传说中的contax,nikon RF转接环最后还是
没有出来,比较遗憾。 所谓的转接环不过就是个helical, 听说拆多了很容易损伤后
组 |
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g*b 发帖数: 60 | 50 Web of Science 上查得 Fu J and Yan SD 所合作的文章。其中 Yan SD 是大多数文章
的通信作者。
要查真相,为何不向这个通信作者写 email 询问呢?
Title: An intracellular protein that binds amyloid-beta peptide and mediates
neurotoxicity in Alzheimer's disease
Author(s): Yan SD; Fu J; Soto C; et al.
Source: NATURE Volume: 389 Issue: 6652 Pages: 689-695 Published: OCT
16 1997
Times Cited: 246 (from All Databases)
[ View abstract ] [ Hide abstract ]
2. Title: Amyloid-beta peptide-receptor for advanced glycation endproduct
interaction elicit... 阅读全帖 |
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