w*******y
发帖数: 60932 | 1 Sony Cycle Energy Nickel Metal Hydride (NiMH), 2000 mAh Pre-Charged "AA"
Rechargeable Batteries - 8 Pack:
http://www.adorama.com/BYSOCE2AA8.html?emailprice=t&utm_term=Ot
Features
Charge Time: 7 hour charge time
For Multi-Use Devices: For multi-use devices like remote controls, CD
players
Pre-Charged: Pre-charged 2,000 mAh capacity AA NIMH rechargeable
batteries. Lasts 3x longer than alkaline batteries. 1,000x rechargeable. Low
self discharge rate. Maintains 75% of power after 1 year ... 阅读全帖 |
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w**********6
发帖数: 575 | 2 请问下prius hydrid最低多少钱可以拿下? |
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g****g
发帖数: 1828 | 3 4 PackAA Rechargeable NiMH Battery 1.2V 4Pc-Pack, 2450mAh. MultiLife Nickle
Metal Hydride Battery. Hold a Charge for up to 1 Year When Not in Use.
Philips (R6B4A245/27) (More Details)
Coupon Code :MLCK17127209283AL1 limit 500 uses
Regular Price: $7.99 Final Price: $7.69 Shipped |
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m*****e
发帖数: 85 | 5 http://pubs.acs.org/doi/abs/10.1021/ja904224y
Reductive and Transition-Metal-Free: Oxidation of Secondary Alcohols by Sodium Hydride
Xinbo Wang, Bo Zhang and David Zhigang Wang*
School of Chemical Biology and Biotechnology, Shenzhen Graduate School of Peking University, Shenzhen, China 518055
Abstract
The potential utilities of the simplest hydride reductant sodium hydride (NaH) as an oxidation promoter have long been overlooked. Uncovered here are some unprecedented reactivities of this classic |
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n******n
发帖数: 98 | 6 的确是很有意思的实验结果，只是感觉作者有些急于发文章而对于机理的研究不够充分
。试剂纯度，金属离子，溶剂，反应温度等等都没做足够，或者没提供足够的筛选结果
，所以整个文章读起来感觉怪怪的。
而且根据这个实验结果，电子云密度大的aryloxide看上去都是不错的hydride donor
Sodium Hydride
Peking University, Shenzhen, China 518055
NaH) as an oxidation promoter have long been overlooked. Uncovered here are
some unprecedented reactivities of this classical reagent under very mild
conditions, including alcohol oxidation, tandem allylic alcohol oxidation&#
8722;hydride conjugate reduction, and aldehyde oxidative amidation. Thes |
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T**********r
发帖数: 1223 | 7 http://web.stratfor.com/images/writers/CHINA_RARE_EARTH_ELEMENTS.pdf?fn=9617327557
China and the Future of Rare Earth Elements
October 14, 2010
clip_image002
STRATFOR
PDF Version
* Click here to download a PDF of this report
A recent diplomatic spat between China and Japan has heightened territorial
tensions and called attention to China’s growing forcefulness with foreign
powers. One of the more intriguing aspects of this development was China’s
suspension of the export of “rare ea... 阅读全帖 |
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c******n
发帖数: 5697 | 8 英文烂也不能烂到跟日车黑一样的这种地步啊
prius hydrid车子的engine设计本身就是如果你同时踩下加速和刹车, 车子会停下来
engine会关掉, 你只要开过prius试试就知道了, 要想自动加速最好找个不是hydrid多
容易装啊
这个骗子自己破产欠了70万债, 车子还是欠Toyota没付钱的, 他还想问toyota要辆新车
来, 更搞笑的是车子的刹车皮根本没有多少磨损
看来这个toyota balloon boy 来车板行骗完全是绰绰有余 |
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l******8
发帖数: 9475 | 9 20-60x Zoom Eyepiece
Nikon announced two new EDG fieldscopes with VR technology (world’s first).
They can be attached to a DSLR with an adapter - see this guest post for
more info.
Key features:
The world’s first fieldscopes featuring Nikon’s lens-shift type VR (
Vibration Reduction) system (as of October 2011)
It reduces vibrations to approximately 1/8*2 during observation,
providing the equivalent of a shutter speed approximately two stops*2 faster
in digiscoping
Easy VR operation;... 阅读全帖 |
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c****i
发帖数: 27 | 10 【 以下文字转载自 Chemistry 讨论区 】
发信人: methane (nickname), 信区: Chemistry
标 题: What a ground-breaking discovery!
发信站: BBS 未名空间站 (Tue Jul 21 22:00:38 2009, 美东)
http://pubs.acs.org/doi/abs/10.1021/ja904224y
Reductive and Transition-Metal-Free: Oxidation of Secondary Alcohols by Sodium Hydride
Xinbo Wang, Bo Zhang and David Zhigang Wang*
School of Chemical Biology and Biotechnology, Shenzhen Graduate School of Peking University, Shenzhen, China 518055
Abstract
The potential utilities of the simplest hydrid |
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d**n
发帖数: 5 | 11 同意，作者提了两个机理，感觉都不符合化学常识。
第一个benzylic的H作为hydride给Na
第二个醇羟基的质子作为hydride给Na |
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b**y
发帖数: 86 | 12 俺最好奇的是这个热力学上是可行的吗？
按照作者的说法，整个净反应就是
醇--> 酮 + H2
delta G是正是负？
似乎酮的氢化在催化剂条件下（Pd啊什么）是应该可以发生的；那就
是说相反的过程不自发，在热力学上这个反应就不可能？
哪位大侠分析一下。
Sodium Hydride
Peking University, Shenzhen, China 518055
NaH) as an oxidation promoter have long been overlooked. Uncovered here are
some unprecedented reactivities of this classical reagent under very mild
conditions, including alcohol oxidation, tandem allylic alcohol oxidation&#
8722;hydride conjugate reduction, and aldehyde oxidative amidation. These
readily implem |
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t******t
发帖数: 3045 | 13 不得不说不可思议
Sodium Hydride
Peking University, Shenzhen, China 518055
NaH) as an oxidation promoter have long been overlooked. Uncovered here are
some unprecedented reactivities of this classical reagent under very mild
conditions, including alcohol oxidation, tandem allylic alcohol oxidation&#
8722;hydride conjugate reduction, and aldehyde oxidative amidation. These
readily implementable transition-metal-free processes feature exceptional
material accessibility, operational simplicity, and : envir |
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g*********n
发帖数: 808 | 14 锂电池特辑1:迈向超级电池[物理]
锂离子电池，也许是下一代能源和交通问题解决的方法
1801年，伏打把他的“电堆”装置公开给拿破仑，他不可能想到两个世纪之后，他的发
明可能成为人类生活的中心。由被盐水浸泡的锌和银电极的原始电池使得小型电化学能
源-锂电池成为了现代消费电子市场的中心。
在《瓶瓶装闪电》中，科学记者森斯-费莱彻解释了锂电池的工作原理，并且对致使锂
电池盛行的研究节奏进行了描述。每年数十亿的元件生产和数十亿的美元利润，可见移
动电子市场正在繁荣。在绿色能源中，锂电池也受到了新的挑战。费莱彻描述到发展下
一代锂电池的激烈竞争，但是可能更多的人选择现有的技术。
日益减少的石油资源以及备受关注的气候变化迫使我们使用更多的替代能源，比如太阳
能、风能，也不得不用混合动力车、油电混合车以及最终的全电动汽车来替代污染的内
燃汽车。由于我们的太阳不能按照我们的要求发光，风不能按照我们的意愿吹来，这些
可再生能源的成功应用依赖于我们高效的储电能力。电化学电池，特别是锂电池，成为
了最佳选择，因为它们把化学能转变为电能效率很高并且无有毒物质释放。
玻利维亚和南美国家巨大储量的碳酸锂盐可使汽... 阅读全帖 |
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w*******y
发帖数: 60932 | 15 Shnoop.com has the PowerGenix Fast Charger + 4 AA NiZn 1.6v Rechargeable
Batteries for $7.99 with free shipping.
Here is their blurb:
quote
GO GREEN AND SAVE GREEN! THE HOTTEST SELLING BATTERIES ON THE WEB!
Originally the invention of Thomas Edison, and until recent innovations by
PowerGenix, the Nickel-Zinc battery was considered too expensive to produce.
PowerGenix s recent breakthrough s in engineering have changed this
playing field, producing a high-voltage rechargeable battery that is
de... 阅读全帖 |
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B*********e
发帖数: 86 | 16 【 以下文字转载自 Complain 讨论区 】
发信人: BiggeyIssue (出大事儿了..(可算)出大事儿了...), 信区: Complain
标 题: 【严重投诉20180315】Re: authorship求教，被学生耍了 (转载)
发信站: BBS 未名空间站 (Thu Mar 15 18:51:02 2018, 美东)
///////////////////////////////////////////////////////
http://www.mitbbs.com/article_t/Complain/31350655.html
[回复] [回信给作者] [本篇全文] [本讨论区] [修改] [删除] [转寄] [转贴] [收藏]
[举报] [ 1 ]
发信人: BiggeyIssue (出大事儿了..(可算)出大事儿了...), 信区: Complain
标 题: Re: authorship求教，被学生耍了 (转载)
发信站: BBS 未名空间站 (Thu Mar 15 18:51:02 2018, 美东)
///////////////([em... 阅读全帖 |
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x*********g
发帖数: 11508 | 17 一年前的文章，现在读仍然很有意义。
http://www.bbc.co.uk/blogs/newsnight/paulmason/2009/11/rare_earth_the_new_great_game.html
Rare earth: The New Great Game
Post categories: China, Energy, Technology, Trade
Paul Mason | 14:57 UK time, Wednesday, 18 November 2009
The rare earth story goes to the heart of China's relationship with the West
- not just that, but to the heart of the West's inability to understand
China.
It is a complicated story, involving a whole chunk of the Periodic Table,
high secrecy, patent batt... 阅读全帖 |
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d*b
发帖数: 21830 | 18 现在说是Lithium Aluminium Hydride，电石遇水还不一定爆炸 |
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i******r
发帖数: 1175 | 19 鱉完成的這量子計算模擬落後有10年了吧。量子計算領先梯隊裏沒有中國團隊。沒有一
樣重要研究成果是中國人的。
Timeline[edit]
Main article: Timeline of quantum computing
In 1959 Richard Feynman in his lecture "There's Plenty of Room at the Bottom
" states the possibility of using quantum effects for computation.
In 1980 Paul Benioff described quantum mechanical Hamiltonian models of
computers[57] and the Russian mathematician Yuri Manin motivated the
development of quantum computers.[58]
In 1981, at a conference co-organized by MIT and IBM, physicist ... 阅读全帖 |
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a***e
发帖数: 27968 | 20 fusion hydrid是weak hybrid,和cam, accord hybrid类似
ford得是250才会跟prius比 |
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w**********6
发帖数: 575 | 21 开过几天 空间还行, amazing mpg, all in panel 都还行
想换成这车? 不知道谁最近买过知道价格的 |
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m********c
发帖数: 13337 | 22 好时候已经过去了，我一朋友三月中旬买的新车，才18K，现在涨了快5K了。 |
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l*****x
发帖数: 3431 | 25 这个价格too good to be true |
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D**C
发帖数: 331 | 28 Your "if" is wrong.
There are two batteries found in a Prius. The first is a lead-acid (Pb-A)
12v accessory battery which is commonly found in most vehicles on the road.
The second is the main hybrid driving battery, which is specific to hybrid
electric vehicles (HEV) and electric vehicles (EV).
So far as I know, all prius hybrid battery are made in Japan by this company
. (all their factories are in Japan too, not China)
http://www.peve.jp/e/index.html
The Prius' battery is made in Japan in by ... 阅读全帖 |
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f****t
发帖数: 15913 | 29 For hydrid cars running at low to medium speed, with the help of battery,
the gas engine can either work in most fuel efficient mode or shut down
completely. This is how hybrid cars save gas.
When you cruise at high speed on hwy for long time, the small gas engine has
to work all out (i.e. not most fuel efficient) and is never turned off.
Batteries cannot help in this case, because of its low capacity. |
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p*****n
发帖数: 97 | 30 刚买了一份consumer report关于车的专辑，好像很多大的连锁商店都有卖的。其中
family sedans and wagons的排名：
1. Camry Hydrid xle
2. Prius V three
3. Camry Le
4. Subaru Legacy 2.5i premium
5. Kia Optima Lx 2.4
5. Jetty sport wagen TDI (man)
6. Mazda6 i Sport (4 cyl)
7. Mazda5 grand touring
8. Hyundai Sonata GLS（2.4）
9. Jetta Sportwagen SE 2.5
10 Kia Optima Sx 2.0T
11. Hyundai Sonata Ltd 2.0T
12 Mazda6 sgrand touring v6
13. Subaru Legacy 3.6 R Ltd.
以上都是推荐的。排名从高到低。 |
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X***9
发帖数: 7385 | 33 accord hybrid vs camry hybrid
honda 用的是比较先进的 lithium ion电池，toyota用nickel metal hydride
油耗50/45/47 toyota 40/38/40（base model 高1mpg）
从dynamic 比较角度，从用油还是用电的百分比，toyota百分之七十多都是在用油的发
动机，而honda正好反着，百分之70多都是在用电。 |
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z*****3
发帖数: 1793 | 34 来自主题: Automobile版 - 买车的烦恼 总的来讲你预算不够，3W我估计就够了。另外，我建议你拓宽范围，别太局限，hydrid
的车非常省油。 |
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c**z
发帖数: 1014 | 35 插电混动听起来跟hydrid还不一样? hybrid好像是刹车啊什么的时候就充电吧
你能推荐个插电混动的车嘛，回头研究一下 |
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f****l
发帖数: 8042 | 36 上次帮同学买一个hydrid civic，号称刚换电池，电话联系一说看车的时候带上换电池
的单据，后来就尿遁了。 |
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u****q
发帖数: 24345 | 37 lithium-ion vs. old nickel-metal hydride batteries |
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B*********e
发帖数: 86 | 38 【 以下文字转载自 Complain 讨论区 】
发信人: BiggeyIssue (出大事儿了..(可算)出大事儿了...), 信区: Complain
标 题: 【严重投诉20180315】Re: authorship求教，被学生耍了 (转载)
发信站: BBS 未名空间站 (Thu Mar 15 18:51:02 2018, 美东)
///////////////////////////////////////////////////////
http://www.mitbbs.com/article_t/Complain/31350655.html
[回复] [回信给作者] [本篇全文] [本讨论区] [修改] [删除] [转寄] [转贴] [收藏]
[举报] [ 1 ]
发信人: BiggeyIssue (出大事儿了..(可算)出大事儿了...), 信区: Complain
标 题: Re: authorship求教，被学生耍了 (转载)
发信站: BBS 未名空间站 (Thu Mar 15 18:51:02 2018, 美东)
///////////////([em... 阅读全帖 |
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s******d
发帖数: 323 | 39 ☆─────────────────────────────────────☆
stockdemon (天下大乱·返璞归真) 于 (Sat Jan 20 11:04:50 2007) 提到:
lead-acid ("flooded" and VRLA),
NiCd,
nickel metal hydride (NiMH),
lithium ion,
Li-ion polymer,
zinc-air
molten salt batteries.
我在 Hybrid Car/Bus 这个行业中，但是我不懂电池。我们公司接触过的电池只
有 NiMH 和 Lithium ion (polymer?)，其他的除了 lead-acid 我都没听说过。
所以这两种应该是最有前途的。从最近的几个 project 中，感觉锂电池的性能
是我们 desirable 的，比 NiMH 要好。
☆─────────────────────────────────────☆
KennyD (\/)(\/) 于 (Sat Jan 20 12:22:10 2007) 提到:
I know tha |
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j******u
发帖数: 41683 | 40 呵呵，链接没有，网站没有
我只能看啊
Nickle |
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c**i
发帖数: 6973 | 42 To be sure, Tesla did not consider the motor as the most difficult part of
the project.
A quote of the report:
"From the start, it was clear that the big technological hurdle was to
develop a safe, reliable, reasonably priced battery that can deliver longer
ranges than the nickel-metal hydride units in today's gas-electric hybrids.
That meant lithium-ion technology, such as typically used for laptop
batteries.
"The biggest hurdle, however, has been the transmission. Much time was spent
trying to |
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X***S
发帖数: 14 | 43 我的帖子不是广告， 不是卖东西， 是给几个孩子找一个好老师， 违反了你哪条规定
？？？？？
你为什么删？？？？？
Boston 版成了你个人的后院了？？？？
看看Boston 版上请推荐的帖子， 你删吧
1 Seashores Apr 4 请家长们推荐附近可以骑马的农场
2 virgozxy Apr 7 求推荐报税师或者报税软件……
3 Adeline425 Apr 7 急，请推荐波士顿市内好的绿卡移民律师
4 dillion Apr 7 请推荐NORTH EASTERN UNIV附近的APARTMENT
5 ctrc Apr 11 请推荐去纽约总领馆的不堵车路线，包子谢
6 longwoodwalk Apr 12 麻烦推荐好点的儿童牙医？
7 nessie Apr 13 求助：6月份要搬去boston，求推荐lexington的
apartmen... 阅读全帖 |
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z******n
发帖数: 41 | 44 hydride，你真是太好人了。。。
谢谢你了~
不知道你什么时候电话方便？ |
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z******n
发帖数: 41 | 45 实在不好意思，刚刚跟LD联系，可是他说已经在Ikea定了一些东西，所以很谢谢
Hydride.....你看看还是给其他需要的人吧~ |
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b*****l
发帖数: 298 | 46 http://www.chem.uci.edu/~gemiller/reactor.html
这个东西跟那个电厂啥的不是一个级别的吧.
有看得懂的同学画个可能需要的疏散范围吧
The reactor is a 250 kilowatt steady-state power Mark I TRIGA reactor built
by General Atomics. Pulsing is possible to about 1000 megawatts if needed.
TRIGA reactors are water and zirconium hydride moderated to be especially
safe for training and research purposes. Fuel is uranium enriched to 20% in
U-235. The reactor first became critical in November 1969. The facility
specializes in neutron activation analy... 阅读全帖 |
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m***y
发帖数: 125 | 49 今天和LD说好在钓一个小时，还是到了fishing dock，因为是周日没有人钓，还是老地
方，用的也还是jig,上了两条perch, 全部release, 半小时后，远处看到闪电，准备十
分钟后回家。 LD说道：和我说话，你看挂到石头， 哎，怎么还动。lD的杆弯的角度极
大，看样子鱼个头不小。 LD笑道：人品终于爆发了。由于担心杆会断，我扔下手里的
杆，一个箭步冲过去，开始遛鱼，拉到几ft的距离，看得很清楚，至少在25inch的
stripted Bass或者hydrid，让LD拿出买的抓鱼的手套，换LD持杆， 我戴手套想抓鱼，
还是差一点距离，看来水位又有点降了。我说我沿那个一ft宽的横杆走到岸边，就可以
land了，LD担心会掉下水，坚决不同意。我只好继续用可怜的6磅线遛鱼吧，大家伙扎
了三个猛子都被我化解，一直告诉自己，等会它累了，就好办了。结果它一个大猛子扎
下去，线断了. 然后就是一个劲的后悔，怎么又没带网子啊。 LD相当气愤地说：还不
如我自己来呢。 俺无言，谁让俺两天之内连丢两条大鱼啊
后来又钓了十分钟，仅又上一perch, 放掉，走人 |
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