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全部话题 - 话题: kinetics
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b****n
发帖数: 6896
1
我觉得应该进行“alternative military action"
F*****y
发帖数: 3877
2
你11-12年来的ufl,研究金属离子键光谱相关的,你觉着我把你的反美言论发到下面
这些人,他们能不能记起来你是哪位?
Jason E. Butler
Professor 352-392-2591
[email protected]/* */ Dynamics of Complex Fluids, Suspension and Multiphase
Fluid Mechanics, Polymer Dynamics and Rheology
Anuj Chauhan
Professor 352-392-2592
[email protected]/* */ Microfluidics, Drug Delivery, Biomaterials, Complex
Fluids
Oscar D. Crisalle
Professor 352-392-5120
[email protected]/* */ Process Control Engineering, Manufacture and
Optimization o... 阅读全帖
x****6
发帖数: 4339
3
讨论生物问题怎么能少了千少我。你看看反转录酶和DNA聚合酶的分子大小和复杂性就
能知道,前者在后者面前就是个小不点,简单的很。并且缺少一个校对的domain。后者
保真性是前者的3到4个数量级。而这个保真性是除了有校对结构,还通过一种叫做
kinetic proofreading的分子机制实现的。这些复杂的机制需要更大/复杂的分子来完
成。


: 反转录 retro 至少要精确到能复制反转录病毒自身吧?

: 那退一步说,这 DNA 复制算法还是没经过张老 coding review,否则至少也得
搞个

: CRC 循环校验码之类的容错机制。

t******l
发帖数: 10908
4
所以你的意思是 DNA 高级货关键是校验算法强大。。。这点我同意。。。所以从这个
角度看,100% 的 deterministic 机制,基本是古生物学家的想象。
不过其实 RNA 反转录的保真度也不算太差了。。。这个简单的玩意儿到底搞清楚没有?


: 讨论生物问题怎么能少了千少我。你看看反转录酶和DNA聚合酶的分子大小和复
杂性就

: 能知道,前者在后者面前就是个小不点,简单的很。并且缺少一个校对的domain
。后者

: 保真性是前者的3到4个数量级。而这个保真性是除了有校对结构,还通过一种叫做

: kinetic proofreading的分子机制实现的。这些复杂的机制需要更大/复杂的分
子来完

: 成。

: 搞个

s********y
发帖数: 473
5
和Kinetic区分
C****o
发帖数: 1549
6
Kai Sun, Shengkai Wang, Ritobrata Sur, Xing Chao, Jay B. Jeffries, Ronald K.
Hanson, "Time-resolved in situ detection of CO in a shock tube using cavity
-enhanced absorption spectroscopy with a quantum-cascade laser near 4.6μm,"
Optics Express (2014), 22(20), 24559-24565.
Kai Sun, Shengkai Wang, Ritobrata Sur, Xing Chao, Jay B. Jeffries, Ronald K.
Hanson, "Sensitive and rapid laser diagnostic for shock tube kinetics
studies using cavity-enhanced absorption spectroscopy," Optics Express (2014
), ... 阅读全帖
C****o
发帖数: 1549
7
来自主题: Military版 - 超星念书念了12年 脑子瓦特了
其实就4篇, 杂志都不咋地
Kai Sun, Shengkai Wang, Ritobrata Sur, Xing Chao, Jay B. Jeffries, Ronald K.
Hanson, "Time-resolved in situ detection of CO in a shock tube using cavity
-enhanced absorption spectroscopy with a quantum-cascade laser near 4.6μm,"
Optics Express (2014), 22(20), 24559-24565.
Kai Sun, Shengkai Wang, Ritobrata Sur, Xing Chao, Jay B. Jeffries, Ronald K.
Hanson, "Sensitive and rapid laser diagnostic for shock tube kinetics
studies using cavity-enhanced absorption spectroscopy," Optics Exp... 阅读全帖
x****6
发帖数: 4339
8
来自主题: Military版 - Intel 科学奖 2018 Finalists
看题目,都是学术前沿的工作,屁挨着地水平的。
以马公和千老领域为主。
Picoscale Mechanics of Atomically Engineered Materials
Optical Control of Protein Assembly and Activity in Cell-Like-Compartments
Cell Membrane-Coated Nanodevice for Anti-Virulence Therapy Against
Antibiotic Resistant Bacteria
Artemisinin as a Potential Parkinson's Disease Treatment via Alleviation of
α-Synuclein Mediated Neuronal Damage and Inflammation
Exploring Posterior Growth in D. rerio Using a Live Cell Cycle Biosensor
Modeling the Spatio-Temporal Dynami... 阅读全帖
W*****B
发帖数: 4796
9
来自主题: Military版 - 影评家们高潮连连
影评家们高潮连连。票房会不会破纪录?将军们会去看吗?我对黑人没兴趣,所以不太
可能去看。
The Revolutionary Power of Black Panther
TIME Staff
The RevolutionaryPower of Black Panther
Marvel’s new movie marks a major milestoneBy JAMIL SMITH
The first movie I remember seeing in a theater had a black hero. Lando
Calrissian, played by Billy Dee Williams, didn’t have any superpowers, but
he ran his own city. That movie, the 1980 Star Wars sequel The Empire
Strikes Back, introduced Calrissian as a complicated human being who still
did the right t... 阅读全帖
g**1
发帖数: 10330
10
来自主题: Military版 - 麻痹的,其实美军爱死土鳖了
http://www.thedrive.com/the-war-zone/18489/despite-what-youve-heard-the-navy-isnt-ditching-its-railgun-and-budget-docs-prove-it
Despite What You've Heard, The Navy Isn't Ditching Its Railgun And Budget
Docs Prove It
The service is still moving ahead with the electromagnetic weapon, which
takes on new significance given recent Chinese developments.
On Feb. 12, 2018, the Navy released its proposed budget for the 2019 fiscal
year, which allots almost $45.8 million for research and development into
... 阅读全帖

发帖数: 1
11
来自主题: Military版 - 描述霍金辐射的,看不懂
The formula
S = entropy (a thermodynamic quantity representing the unavailability of a
system’s thermal energy for conversion into mechanical work)
h = Planck constant (the energy of a quantum of electromagnetic radiation
divided by its frequency)
G = Newton’s constant (universal gravitational constant)
A = area of event horizon (a boundary in spacetime beyond which events
cannot affect an outside observer)
c = speed of light
k = Boltzmann’s constant (relates the average kinetic energy of partic... 阅读全帖

发帖数: 1
12
来自主题: Military版 - 描述霍金辐射的,看不懂
The formula
S = entropy (a thermodynamic quantity representing the unavailability of a
system’s thermal energy for conversion into mechanical work)
h = Planck constant (the energy of a quantum of electromagnetic radiation
divided by its frequency)
G = Newton’s constant (universal gravitational constant)
A = area of event horizon (a boundary in spacetime beyond which events
cannot affect an outside observer)
c = speed of light
k = Boltzmann’s constant (relates the average kinetic energy of partic... 阅读全帖
m**c
发帖数: 7349
13
来自主题: Military版 - 描述霍金辐射的,看不懂
So it basically stipulates that entropy is proportional to spacetime
boundary with the coefficient relating to certain constants. Why just put it
as:
S=cK.


: The formula

: S = entropy (a thermodynamic quantity representing the unavailability
of a

: system’s thermal energy for conversion into mechanical work)

: h = Planck constant (the energy of a quantum of electromagnetic
radiation

: divided by its frequency)

: G = Newton’s constant (universal gravitational constant)
阅读全帖
b********n
发帖数: 38600
14
Bannon: We're at an economic war with China from CNBC.
https://www.cnbc.com/video/2018/07/18/bannon-economic-war-china.html?__
source=cnbcembedplayer
Bannon: We're at an economic war with China from CNBC.
Russia is an annoyance. China is our great challenge. Russia's economy is
the size of Texas or New York State? It's got lots of nuclear weapons...but
in today's warfare...nuclear weapons are taking a less important role. Trump
is trying to end the Cold War and the Korean War...and all he is get... 阅读全帖
x****6
发帖数: 4339
15
来自主题: Military版 - 现在各学科最大热点是哪些?
这是UCSF的合成生物学大佬wendell lim的proposal abstract.
请你睁大你的狗眼认真看看,哪怕只是标题也好
http://grantome.com/grant/NIH/R01-CA196277-01
Redesigning the T cell: Using Synthetic Biology to Engineer Therapeutic
Cells
Lim, Wendell A.
University of California San Francisco, San Francisco, CA, United States
Engineered cells have the potential to serve as powerful """"""""smart""""""
"" therapeutic agents, but we lack a systematic framework for engineering
cells to optimize their efficacy and minimize their adverse effect... 阅读全帖
L*****d
发帖数: 5093
16
来自主题: Military版 - 班农谈美中贸易战
前白宫首席战略师史蒂芬·班农在紧紧贴着国会山东面的一所1812年建造的房子里接受
了我的采访。他将这所房子称作“布莱巴特大使馆”。
“安德鲁(布莱巴特新闻网站的创始人)和我在2009年买下了这座房子。当我们来
到华盛顿的时候,觉得共和与民主两党管理国家的方式,让我们觉得这里好像是外国首
都。所以我们戏称这是我们的大使馆。”他兴奋地谈起了当初组织茶党运动的历史。
曾经被媒体称作“白宫大脑”的班农显然不是一个像首都其他政客那样知道如何轻
松地滑翔进入谈话的人。开场的话题就如此严肃。
我在他桌上看到了一本傅高义的《邓小平传》,便说:“傅高义是我在哈佛时的老
师。”
班农的脸上绽出了笑容。
“原来是他要为你所有的……呃……呃……历险负责。”
有那么一秒钟,我还以为他要选择“捣乱”这个词。毕竟是因为我的各种让人头疼
的历史才使得这位在2016年给世界现存秩序捣了个大乱的人同意坐下我和进行长谈。
班农认为,《邓小平传》是每个想了解当代中国的人都应该读的书,尽管傅高义与
他在美中关系的看法上并不见得一致。
往下两个小时中,我们谈到了美中贸易战、两国的历史、当今世界变化等等一系列
话题。在这里我集中介... 阅读全帖

发帖数: 1
17
来自主题: Military版 - 埃尔帕索没啥老中吧?
你看有老中faculty 以前在招聘博士后
药化合成 博士后 - 美国 德克萨斯大学 艾尔帕索分校 化学系
Postdoctoral Research Fellow in Synthetic Medicinal Chemistry
Postdoctoral researcher positions are available in the Zhu group at
Department of Chemistry, University of Texas at El Paso (UTEP), to develop
small molecule drug candidates of novel actions for targeted cancer and
cardiovascular disease therapies. The Zhu Group website is: http://science.utep.edu/zhu/ .
Dr. Yaoqiu Zhu got his Ph.D. with Professor Richard Silverman (inventor of
Pfi... 阅读全帖
w***n
发帖数: 2474
18
来自主题: Military2版 - More About Chinese Laser Weapon Development
A Scientist's Biography discloses China's Strategic Laser Weapon Project
2012-01-14 (China Military News from China Military Power Mashup) -- World
has known China's anti-satellite missile test in 2007. Besides the kinetic
kill vehicles, however, China has been finding directed energy weapons, such
as laser, to play a significant role in outer space competition since 1980s
. But few opened information can be available to evaluate China's Energy
Weapon Development. And some western analysts just ... 阅读全帖
g**1
发帖数: 10330
19
http://www.prnewswire.com/news-releases/us-navy-launches-two-ra
US Navy launches two Raytheon-made SM-3 missiles against single ballistic
missile target
Scenario designed to test ship's ability to launch SM-3s
PACIFIC MISSILE RANGE FACILITY, KAUAI, Hawaii, Sept. 18, 2013
In a Missile Defense Agency test, the U.S. Navy launched two Raytheon
Company (NYSE: RTN)-made Standard Missile-3 Block IBs from the USS Lake Erie
against a complex, separating short-range ballistic missile target. The
first gui... 阅读全帖
a******g
发帖数: 13519
20
来自主题: Military2版 - 嫦娥三成功发射
看这个更有意思,貌似是目前唯一实时播放KEI(Kinetic Energy Interceptors)技术的
视频。
从1:43开始,大家慢慢欣赏。
下面的视频是米帝的科普PPT。
l****z
发帖数: 29846
21
By Monty Pelerin
The number of Obama supporters seems inversely related to his time in office
. Many wonder what happened to "The One We Are Waiting For."
Obama assumed office in difficult economic times. After a couple of years
of excuses -- which included "the problems were worse than we knew" and the
generic, all-purpose "it's Bush's fault" -- Obama now owns the original
problems and new ones of his own doing. An incomplete report card on his "
accomplishments" would include the following:... 阅读全帖
l****z
发帖数: 29846
22
来自主题: USANews版 - Killing Them Softly
By Jed Babbin on 6.4.12 @ 6:08AM
Obama's "kill list" tactic is assuredly doing nothing to win the war on
terror.
Between December 7, 1941, and September 2, 1945, a clarity of thought and
purpose pervaded America. We understood who our enemies were and undertook
as a nation to bring about their utter defeat. After September 1945, that
clarity was dulled in Korea and by the midpoint of the Vietnam War it had
disappeared altogether.
We never had that clarity after the war that was brought to our ho... 阅读全帖
w*****2
发帖数: 1458
23
来自主题: USANews版 - 鳌八开此裁人了
Last night's victory for the President marks the first time since its
inception that Obamacare is no longer a what-if; it is the future of health
care in America.
It also means a near immediate impact on the economy. With 20 or so new or
higher taxes set to be implemented, ranging from a $123 billion surtax on
investment income, through the $20 billion medical device tax, all the way
down to the $600 million executive compensation limit, Obamacare will be a
nearly unbearable tax burden on the ... 阅读全帖
T*********I
发帖数: 10729
24
来自主题: USANews版 - 西雅图Pacific大学发生枪击案
是不让带枪。所以说gun free zone是罪犯的帮凶。
否则可能都不用等罪犯上子弹的间歇。
看看这位英雄都喜欢什么:
GrabAGun.com
Savage Arms
Cheaper Than Dirt
National Rifle Association
Kinetic Concealment
Mossberg & Sons, Inc
Remington Arms Company
24
....
https://www.facebook.com/jon.meis
x********e
发帖数: 35261
25
这里也贴一份,让大家看看lz是怎么得出别人“作假”“谋杀儿童”的。
我来给门外汉解释一下thex纠结的T-25,T-75问题吧。
首先,T-25和T-75是培养细胞(fibroblast)所用的培养瓶,25比75小。要测患者的酶
活,先培养患者上皮细胞,取得足够做实验的蛋白量。因为患者上皮细胞是取的,所
以 用小瓶培养。作为参照的正常上皮细胞是现成的,用大瓶培养。对于提取蛋白的过
程我 虽然不清楚,但做实验的人明确说了,小瓶培养细胞的yield跟大瓶差不多。这是
非常 正常的事。简单比喻就是你在同一块土地上种一亩土豆跟种五亩土豆最后得到的
单位产 量应该是一样的。这里如果不一样,说明患者的病因是无法制造足够多的蛋白
,对应的 是基因缺失。但事实上一样。如果有问题,只能是基因上有点突变,影响了
酶的活性。
接着说测酶活这个实验。只要大学学生物或者pre-med就必修biochemistry,就肯定做
过类似的测酶活实验。thex你要真为娃着想,就把打嘴炮的时间用来学习最基础的生化
吧。建议你认真读enzyme kinetics和metablism两部分。其他人要是有闲也可以自行
学 习分... 阅读全帖
x********e
发帖数: 35261
26
你不要顾左右而言他。你指控医生因为培养瓶大小作假就是无稽之谈。就算实验员加了
三倍的酶量,根据酶促反应kinetics得到的结果也不会是三倍。
x********e
发帖数: 35261
27
我来给门外汉解释一下thex纠结的T-25,T-75问题吧。
首先,T-25和T-75是培养细胞(fibroblast)所用的培养瓶,25比75小。要测患者的酶
活,先培养患者上皮细胞,取得足够做实验的蛋白量。因为患者上皮细胞是取的,所以
用小瓶培养。作为参照的正常上皮细胞是现成的,用大瓶培养。对于提取蛋白的过程我
虽然不清楚,但做实验的人明确说了,小瓶培养细胞的yield跟大瓶差不多。这是非常
正常的事。简单比喻就是你在同一块土地上种一亩土豆跟种五亩土豆最后得到的单位产
量应该是一样的。这里如果不一样,说明患者的病因是无法制造足够多的蛋白,对应的
是基因缺失。但事实上一样。如果有问题,只能是基因上有点突变,影响了酶的活性。
接着说测酶活这个实验。只要大学学生物或者pre-med就必修biochemistry,就肯定做
过类似的测酶活实验。thex你要真为娃着想,就把打嘴炮的时间用来学习最基础的生化
吧。建议你认真读enzyme kinetics和metablism两部分。其他人要是有闲也可以自行学
习分辨,这就是大学一、二年级的知识水平。测酶活是在酶量充足的条件下监测代谢反
应随时间... 阅读全帖
H***u
发帖数: 1091
28
XBOX Action
b********n
发帖数: 38600
29
Trump vs. Kim Jong-Un? What could go wrong?
s*******u
发帖数: 2249
30
https://www.thenation.com/article/a-new-report-raises-big-questions-about-
last-years-dnc-hack/
t is now a year since the Democratic National Committee’s mail system was
compromised—a year since events in the spring and early summer of 2016 were
identified as remote hacks and, in short order, attributed to Russians
acting in behalf of Donald Trump. A great edifice has been erected during
this time. President Trump, members of his family, and numerous people
around him stand accused of various co... 阅读全帖
P******l
发帖数: 1648
31

That's a great question!
It's leaking all the time but very slow. (The current rate of loss is about
three kilograms (3 kg) of hydrogen and 50 grams (50 g) of helium per second.
according to the answer in the link below)
If space is a vacuum then why doesn't it suck in all the air from Earth's
atmosphere?
https://www.quora.com/If-space-is-a-vacuum-then-why-doesnt-it-suck-in-all-
the-air-from-Earths-atmosphere
Well the great vacuum does "pull" earth atmosphere if thats the correct way
to say it.... 阅读全帖
b********n
发帖数: 38600
32
【 以下文字转载自 Military 讨论区 】
发信人: beijingren (to thine own self be true), 信区: Military
标 题: Bannon, 俄罗斯算个屁,中国才是美国的真正敌人
发信站: BBS 未名空间站 (Thu Jul 19 09:35:44 2018, 美东)
Bannon: We're at an economic war with China from CNBC.
https://www.cnbc.com/video/2018/07/18/bannon-economic-war-china.html?__
source=cnbcembedplayer
Bannon: We're at an economic war with China from CNBC.
Russia is an annoyance. China is our great challenge. Russia's economy is
the size of Texas or New York State? It's got lots of nucle... 阅读全帖
w********a
发帖数: 188
33
【 以下文字转载自 Military 讨论区 】
发信人: wangxiaoya (MITBBS第一媒婆), 信区: Military
标 题: 中国出逃富豪仰融在美筹建汽车厂
发信站: BBS 未名空间站 (Tue Oct 6 19:26:46 2009, 美东)
中国汽车传奇人物仰融准备在美国通过吸引投资移民来筹集资金,兴建混合动力汽车制
造工厂,引起轰动。仰融因涉嫌经济犯罪曾被中国司法当局批准逮捕,但是他在得知消
息后于2002年逃到了美国。
仰融曾经担任辽宁华晨集团总裁,被财富杂志评为中国第三大富豪。来美之后,仰融很
少与外界接触。可就在不久之前,仰融再次一鸣惊人。
今年9月底,仰融与阿拉巴马州州长鲍勃.莱利(Bob Riley)联合宣布,仰融领导的HK
Motors(Hybrid Kinetic Motors)公司计划投资20亿美元,在该州鲍德温(Baldwin)县成
立工厂,生产新型混合动力汽车。而且投资的主要来源,是投资移民带来的资金。美国
移民法规定,如果向偏远、失业严重的地区投资50万元,企业在当地雇员超过一定人数
,就可以获得美国绿卡。
*移民投资,开创汽车融资
s**********i
发帖数: 711
34
来自主题: Automobile版 - Re: Honda insight and Toyota prius
the battery is mostly charged during brakes --
when you slow down the car, kinetic energy is converted
to eletricity by the electric motor/generator.
the insight shuts off the engine during stops,
so you can't charge the battery just let the engine
idle.
and you probably can't use all the power, when
the battery power is low, the car doesn't use
it any more. I'm not sure about this though.
b**y
发帖数: 74
35
来自主题: Automobile版 - 小日本撞了你的腰吧
I hit a Benz SUV from the rear on a local road (Speed < 15mph). The outcomes:
1. Very minor damage on the SUV's bumper.
2. My Accord's hood was raised to release the collision impact.
In my case, the most kinetic energy was absorbed by the rear car. The good
thing is that none is hurt in the accident.
w***z
发帖数: 1158
36
来自主题: Automobile版 - Volvo flywheel technology
A light, cheap and very eco-efficient solution that makes a four-cylinder
engine feel like a six at the same time as fuel consumption drops with up to
20 percent. This autumn, Volvo Car Corporation will be one of the world's
first car makers to test the potential of flywheel technology on public
roads. The company has received a grant of 6.57 million Swedish kronor from
the Swedish Energy Agency for developing next-generation technology for
kinetic recovery of braking energy in a joint project t... 阅读全帖
c******n
发帖数: 5697
37
来自主题: Automobile版 - 如果你的刹车失灵BRAKE FAILURE
no relation
emergency brakes are manual wire operated brakes
you are only risking burning the brakes down
but that is the whole point of having brakes, so you can convert kinetic
energy into friction heat

Any
T******n
发帖数: 42
38
来自主题: Automobile版 - 扫盲贴:神奇的变速箱
I'm sorry for your understanding of physics. More power more acceleration.
Think about this problem from energy point of view. Kinetic energy is the
key. I totally agree with what bideyuanli said

“加速能力就是单位时间你能做多少功”对不起,就凭这一句话,你就没必要在这里讨
论了。加速度a是速度的变化a=dv/dt,牛顿第二定律a=F/m,F=轮上扭矩/轮胎半径。因
为车重m........
★ Sent from iPhone App: iReader Mitbbs Lite 7.36
T******n
发帖数: 42
39
来自主题: Automobile版 - 扫盲贴:神奇的变速箱
bideyuanli 说的“柴油机的卖点就是低转速大扭矩”和“加速能力就是单位时间你能
做多少功”并没有错.
一般我们比较车子起步加速快慢.起步的时候就是对应车子转速由低到高的过程。 我举
个例子吧:比较一大一下两个功率为1w和4w,单位时间作用在质量为2kg的车子上面。 做
功分别为1J和4J。 我们比较车子从起步速度为零到1秒以后的速度大小。 车子的动能
由0分别增加到1和4。
kinetic energy = 0.5 * m * v^2 就是说一秒之后速度分别为1和2 m/s。是不是功率
越大加速度也大?
当然你说的车子加速和最高时速与功率的关系也没有错。但是你没有理解bideyuanli对
你的反驳。
T******n
发帖数: 42
40
来自主题: Automobile版 - 什么是“加速能力” (转载)
这个贴不就是神奇变速箱的延伸么,原贴最后争论的不就是“柴油机的卖点就是低转速
大扭矩”和“加速能力就是单位时间你能做多少功”么?
下面我来解释一下为什么“加速能力就是单位时间你能做多少功”:
一般我们比较车子起步加速快慢.起步的时候就是对应车子转速由低到高的过程。 我举
个例子吧:比较一大一下两个功率为1w和4w,单位时间作用在质量为2kg的车子上面。 做
功分别为1J和4J。 我们比较车子从起步速度为零到1秒以后的速度大小。 车子的动能
由0分别增加到1和4。kinetic energy = 0.5 * m * v^2 。 就是说一秒之后速度分别
为1和2 m/s。是不是功率越大加速度也大?
l********7
发帖数: 1077
41
首先你小车的能量损失算错了
让我来描述这个物理问题
Assume:
1. m1=2m, m2=m, V1=V, V2=-V
2. it is a perfectly inelastic collision:
m1V1+m2V2=(m1+m2)v'
=>v'=V/3
3. the kinetic energy loss of the system is exclusively due to the
deformation of small car and the big car is perfect after the collision
find:energy loss of the system:
E_loss=0.5*2m*v^2+0.5*m*v^2-0.5*3m*(1/3v)^2=1.333mv^2
如果小车以2v的速度撞墙
energy loss of the system:
E_loss= 0.5*m*(2v)^2=2mv^2
显然撞大车比撞墙更划算
m*********g
发帖数: 10735
42
A4和CAMRY是不能摆在一起对比的,属于不同的class,具体请参考官方说明
A4车重3,500lbs
CAMRY车重3,100lbs
A4大约是CAMRY的1.13倍
相同速度的情况下,根据最简单的动能=1/2*mv2,重量越大的话动能自然就越大
撞击的过程是本质上是一个能量转化的过程:动能转化为材料的弹性势能
动能越大,转化的势能也就越大
势能是如何体现的呢?正是通过材料的形变
采用相同材料相同结构的情况下,重量越大的话不难预见形变也会更大
所以这也是为什么官方会说:自重越大的车辆,撞击会比较严重。
Frontal crash test results can't be used to compare vehicle performance
across weight classes. That's because the kinetic energy involved in the
moderate overlap and small overlap frontal tests depends on the speed and
weight of the test vehicl... 阅读全帖
g********d
发帖数: 19244
43
☆─────────────────────────────────────☆
felixcat (felixcat) 于 (Thu Mar 7 17:01:19 2013, 美东) 提到:
发现有一些人存在误解:认为碰撞测试成绩能代表有没有用高强度/超高强度/极高强度
钢材来造车身,有没有“不计成本”来给好货给消费者。从而一旦发现碰撞测试看上去
不好,就觉得车厂没有用好钢材省成本。
事实上并非这样,我下面列举一些具体的车型的车体结构,大家就能发现一些碰撞测试
成绩很好的车子,事实上并没有用很高强度的材料;而一些碰撞测试让人觉得成绩一般
的车子,事实上却是用了很不错的钢材。造成这种直觉上“对不上号”的原因在于,碰
撞测试成绩不完全取决于钢材硬度,它还跟车体形状、能量传递的设计意图有关。
首先看Audi A4。在small overlap碰撞测试成绩出来之后,这车子的结构强度在公众心
目中马上从天堂掉到了地狱。A柱拦腰截断,这不像话。
但是实际上A4车身框架用料极其足,车身结构有65%是强度超过300 MPa的高强度钢制造
;在这里面又有占全车身18%的材料是强度在500到1... 阅读全帖
E********t
发帖数: 4091
44
来自主题: Automobile版 - 4runner SR5 和 trail 差在哪里啊?
Overhead console with Multi-terrain Select, Active Traction Control (A-TRAC)
, VSC 19 cutoff, locking rear differential and Crawl Control 20 switches
Not available Standard
Kinetic Dynamic Suspension System (KDSS)
Not available Optional
F***Q
发帖数: 6599
45
来自主题: Automobile版 - Common EV acronyms
for those of you who want to read more about electric cars, here are some
acronyms you may see often:
BEV:
battery electric vehicle - often known as a full electric car,
a car runs exclusively on a rechargeable battery. examples include
Nissan LEAF and Tesla Model S.
PHEV:
plug-in hybrid electric vehicle - a electric-gas hybrid car,
typically with a large capacity rechargeable battery. most of them
can run under a "Serial hybrid" mode, i.e. run on battery first,
when ... 阅读全帖
G*****h
发帖数: 33134
46
来自主题: Automobile版 - XC90 四个 trim level
http://www.guideautoweb.com/en/articles/26654/volvo_xc90_r-desi
R-Design is one of the four trim levels for the XC90, with Kinetic being the
base-model, followed by Momentum and Inscription.
这几个名字不好记,太不通俗了。marketing 水平不行啊
G*****h
发帖数: 33134
47
来自主题: Automobile版 - XC90 欧洲 MSRP
价格是欧元 C
Diesel 版:
D5 AWD Kinetic 59,472
D5 AWD Momentum 64,376
D5 AWD Inscription 70,412
汽油版:
T6 AWD Momentum 70,634
T6 AWD Inscription 76,910
T8 Twin Engine plug-in hybrid Momentum 79,950
T8 Twin Engine plug-in hybrid Inscription 83,459
作为比较:
Volkswagen Touareg 3.0 TSI Hybrid 93,350
Porsche Cayenne S E-Hybrid 85,179
http://www.autoevolution.com/news/2015-volvo-xc90-price-list-fo
G*****h
发帖数: 33134
48
来自主题: Automobile版 - XC90 欧洲 MSRP
价格是欧元 C
Diesel 版:
D5 AWD Kinetic 59,472
D5 AWD Momentum 64,376
D5 AWD Inscription 70,412
汽油版:
T6 AWD Momentum 70,634
T6 AWD Inscription 76,910
T8 Twin Engine plug-in hybrid Momentum 79,950
T8 Twin Engine plug-in hybrid Inscription 83,459
作为比较:
Volkswagen Touareg 3.0 TSI Hybrid 93,350
Porsche Cayenne S E-Hybrid 85,179
http://www.autoevolution.com/news/2015-volvo-xc90-price-list-fo
y****r
发帖数: 38
49
来自主题: Automobile版 - 2015款沃尔沃XC90欧洲市场价格公布
据国外媒体Autoevolution报道,沃尔沃公司近日公布了2015款XC90车型在欧洲市场的
价格。据悉,2015款沃尔沃XC90车型在欧洲市场的起售价为59,472欧元。
在欧洲市场销售的2015款沃尔沃XC90入门版车型的具体型号为D5 AWD Kinetic,其标配
了四轮驱动系统,搭载了2.0升四缸Drive-E涡轮增压柴油引擎,最大功率为224马力,
最大扭矩为470Nm。与这台引擎搭配使用的为八速自动变速器。2015款沃尔沃XC90入门
版车型的百公里油耗为5.8升,最大行李箱容积为671升。
2015款沃尔沃XC90 D5 AWD Momentum版车型的起售价为64,376欧元,2015款沃尔沃XC90
D5 AWD Inscription版车型的起售价为70,412欧元,2015款沃尔沃XC90 T6 AWD
Momentum版车型的起售价为70,634欧元,2015款沃尔沃XC90 T6 AWD Inscription版车
型的起售价为76,190欧元。所有的2015款沃尔沃T6系列车型将搭载2.0升混合增压引擎
,最大功率为321马力,最大扭矩为400Nm,百... 阅读全帖
g*****o
发帖数: 5955
50
来自主题: Automobile版 - XC90 也要出吊丝运动版?
不知道是不是卖到北美来
In some configurators the Base XC90 trim level, called Kinetic, has been
introduced.
Major differences:
- Halogen instead of LED headlights, so no ‘Thor’s Hammer’ running lights
- 18” wheels
- No roof rail
- Black exterior parts
- Textile upholstery
- Small 8” instrument panel
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