G***G
发帖数: 16778 | 1 random forest, Support Vector Machine, neural network
prediction and classfication
I have training set and testing set.
the accuracy for the training set is good (almost 100%)
but the accuracy for the testing set is always bad (highest is 60%)
how to improve it? |
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Y******e
发帖数: 20256 | 2 提包也得练几年，把accuracy提上去。虽说这是天生的，但是后天努力也很重要。希望
他能熬过去，过1，2年，把Accuracy提高到55%以上，再搭上独有的power running，就
很不错了，。 |
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s******n
发帖数: 518 | 3 这么长的文章你都仔细读了，下面这段bleacher report 上的一定也看一下
This is pretty ludicrous, slanted reporting. Anyone can report something as
fact and make it sound convincing. Just look at the deadspin article about
Derek Jeter's "gay sexual relationship." The ESPN report fails to mention
that it is completely legal to tape from the booths, it is only illegal from
the sidelines. Filming opposing teams coaches for signals is still legal
today. When Mike Shanahan was coaching the Broncos he said himself "Our guys
keep a... 阅读全帖 |
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ET
发帖数: 10701 | 4 50% driving accuracy?
come to Texas, you get plenty room for your driving accuracy.
lol.. |
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ET
发帖数: 10701 | 5 I didn't see anything he improved in any part of the golf game..
he started the game 2-year earlier than me..
he is not good at anything regarding the technical aspect, saying driving
accuracy/green hit/chipping/putts. For sure, driving accuracy could be the
biggest hit for the score. he hits out of bound several times, hits into
trees/rough/tough lie, the score for the hole definitely would be ugly.
he hit fat all the time after he hits good driver. It seemed I just saw one
up-and-town from his |
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v*****r
发帖数: 2325 | 6 concur, if you surely know the your average shot distance, then you should
have high GIR %, say more than 30, even 40%. that hit 7+ greens each 18 hole round.
i found i shoot shorter on average than I imagine when i measuring each tee shot at
course using GPS. and it also varies so much. we tend to only remember longer shots we made.
sugguest use combined indictor distance + accuracy% or distance * accuracy %
such as PGATOUR "total driving (distance + fairway%). lucas glover leads the
stat ca |
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v*****r
发帖数: 2325 | 7 pick up a 3wood at golfmart today. hit balls in front of launch monitor for
almost one hour.
the reality is how inaccurate my driver ball strike. ET is right, accuracy
and technique is of paramount importance, rather than swing speed training.
have to make sure have accuracy first.
i think median carry is 210, a few 230 carry(close to what i did at range), and only one 250 carry (maybe that's why i almost carry over back fence last time, the number is --- 14*
launch, 146.7mph ball spd, 100.7 clu |
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ET
发帖数: 10701 | 8 我说，california miss 不 miss fairway 没关系。
但很多地方，Miss了还是关系很大的。
这个还真是考验player driver accuracy的指标，他swing的时候power & accuracy的t
rade off..
it |
|
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v***s
发帖数: 4031 | 10 Thank you. I don't drive the ball like that in my weekly's games. My
averaged driver driving distance is about 250 yards.I rarely use hybrid to
tee off a par 4 or 5 because of the accuracy of my hybrid, not very good,
faded at times. For a short par 4, I drive the ball with slightly less
shoulders turn, so I get it 220 or 230 yards. Lately my driving accuracy is
improving, like the Saturday's game, fariway 6 out of 7, the Sunday's, 11
out of 14. My goal of playing is not for an eagle, not even f... 阅读全帖 |
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f******u
发帖数: 767 | 11 来自主题: GunsAndGears版 - 齐了，呵呵 I have not got it myself, but I am sure that is a flawless conversion with
AR-15 based on customer rating here. http://www.cheaperthandirt.com/ARR059-7.html#Reviews
Not many reviewer talking about accuracy but one wrote:” This is a must if
you own an ar-15 and aren't rich. Make sure you shoot 40g ammo or you lose
accuracy!!” That's really make sense.
发信人: zodiac (Pychologically Challenged), 信区: GunsAndGears
标 题: Re: 齐了，呵呵
发信站: BBS 未名空间站 (Fri Feb 27 12:29:56 2009)
.223的管子能打.22LR么？能有准头么？ |
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s*******y
发帖数: 21 | 12 Cartridge straight into the chamber from the magazine
Fixed barrel or accuracy equal to such
All steel for longevity
Very high accuracy and reliability
compact size |
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L*******r
发帖数: 8961 | 13 Strongly recommend SKS 56:
1. Good Power - Can be used for hunting mid-size animals
2. Good Accuracy - Better than AK 47
3. Cheap bullet for target shooting
4. Cheap price
If AK 47 were full auto, I would prefer AK. But we are unable to get a full
auto AK, why pay the extra money and sacrifice the accuracy? |
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L*******r
发帖数: 8961 | 14 Thank you ...
How about the accuracy of the .177 BB CO2 pistols? Do they have hop-up? Do
you have any recommendation on .177 BB CO2 pistol that has satisfactory
accuracy to practise target shooting?
I hate hop-up. It makes you not knowing where to aim to and each shot is not
consistant at all. |
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x****7
发帖数: 387 | 15 Reliability? 当然。不过谁说过M-16没有通过过严格 Reliability Tests? It is a
matter of probality. Back in the 50's and 60's, reliability and accuracy
was not really compatible and at the time. And under US Army's doctrine,
accuracy was still taking as the most important aspect of a rifle. Is
lesser probability of hitting an enemy more important than lesser
reliability under poor maintenance?
过去四五十年以来，特别是六十年代国会有关M-16可靠性的听证以来，美国有很多机会
以更可靠的步枪来替换M-16系统（甚至以AK - 反正苏联又没有这方面的专利。别觉得
陆军不会这样做 - 看看M-14）。我想之所以没有这样做的原因主要是弹药 |
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d******e
发帖数: 2541 | 16 now, just $3k, not too bad lal:
Accuracy International AE Rifle 308 24", Black
Price: $3,199.99
Manufacturer: Accuracy International
Manufacturer Item #: AE308
Impact Item #: AI-AE308-4152 |
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f*********n
发帖数: 11154 | 17 http://handgunsmag.com/ammunition/loads_for_snub_nose_revolvers_111610/index.html
......
However, velocity loss is quite significant with a two-inch barrel, and as
velocity diminishes, bullet expansion decreases and penetration increases.
Therefore, the most important question for the pocket revolver owner is,
Just how good, terminally speaking, is the fodder occupying the cylinder?
......
The test platform was a Crimson Trace laser grip-equipped S&W Model 49
Bodyguard. I engaged one m.o.a. dots... 阅读全帖 |
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C*******d
发帖数: 15836 | 19 Not really. I did barrel crown myself but it didn't help with the key hole
problem
at 50 yards. But as you see the problem only occurs about 20% of the time.
Not long
ago, I tried 100 yards with quite good accuracy but couldn't get the target
early
enough before it is covered by new target paper. So I still can not tell
whether
there are key holes at that distance. I read some material online which says
that
5.45x39 are designed not to have the keyhole problem. Some people
experienced this
probl... 阅读全帖 |
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j***n
发帖数: 3786 | 20 look, here is the thing... im only talking about different ammo comes with
different accuracy. i have 18" Noveske DMR, and i can shoot 1MOA 10 round
group all day long with match ammo. i also have a chinese sks, and i can
shoot it with surplus ammo under 6" all i want.
scar just like any other battle rifles, it shoots 2~3MOA with 62gr ammo most
of the time, and it just cannot be better than a AR as far as accuracy goes
by design!
is
never
iron |
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H******S
发帖数: 6011 | 21 For a simple taste, the first DVD covers holding the grip, 7 fundamentals of
shooting, drawing the pistol, tactical & speed reloads, balance of speed
and accuracy, malfunction solving, accuracy, kneeling & supine positions,
prone & urban prone, etc.. |
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s*******n
发帖数: 12995 | 22 我只能说说我有的。这么说吧，只有500大洋出头的Witness Elite Match 的trigger,
finish,handle（除了塑料grip panel外），accuracy，都不比1500大洋的1911差。
可能是由于重的原因，在我手里，accuracy 略比TM好点，不过由于我糟糕的技术（没
法稳定的在25yard打进3”的散布而这两种枪都是为sub 2" 设计的）,我没法比较二者。
我只打过factory的FBI Lite的10mm ( 180 gr @1200 f/s) from USAAMMO 和 Amerian
Eagle,感觉后座要小过230gr@900f/s的TM.因为只打过几百发，虽然没出过任何问题，
但也没法评价它的可靠性。
其实厂家Tafaglio对CZ做了很多改动，有好有不太好。零件拆卸要比CZ75B容易的多。
但自从决定one size frame fits all 之后，frame要比CZ75 Bulky,也重，主要是为了
10mm.所以CZ的grip Panel不fitWitness.
out of Box,trigger pull在5 lb,... 阅读全帖 |
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C*******d
发帖数: 15836 | 23 http://en.wikipedia.org/wiki/Sako_TRG
The TRG system's purposive design features, reliability in adverse
conditions and consistent accuracy performance (a capable marksman can
expect ≤ 0.5 MOA consistent accuracy with appropriate ammunition) have made
it a popular, though expensive, sniper platform.
http://www.6mmbr.com/gunweek069.html
The .308 delivers about 0.45 MOA groups at 420 yards shot from bipod. The .
338 LM shoots about 0.55 - 0.7 MOA at that distance.
可能有些射手能够正常情况下连续打进1/3MOA。不过不管怎样，TR... 阅读全帖 |
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s*******n
发帖数: 12995 | 24 Here is the more detail of the performance of this rifle:
" I have run every type of round through this firearm from light varmint
loads all the way to NATO rounds. All fire flawlessly and all were high
quality match grade ammo. The gun is a bit heavier than a standard AR-15
platform but due to this the recoil is almost unnoticeable. This gun was
used strictly at the range as well as a few hunting trips in Eastern,
Washington. I carried this gun all day for multiple days and it is really
managea... 阅读全帖 |
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S**********s
发帖数: 4534 | 25 for range shooting, prone and benchrest, this gun is great for the money.
for hunting, the weight is an issue. .308 semi-autos can be much lighter.
For the same design in a different package, Browning BAR ShortTrac Stalker
comes in 6 lbs 10oz. while FNAR (the tactical version) comes in 9 and 10 lbs
empty gun, and 11 lbs for FNAR match.
You DON'T want to hump around a 12 lbs rifle on a hunting trip
As far as the two piece stock and free float is concerned, it can be
problematic (and a few reports... 阅读全帖 |
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h*********r
发帖数: 1943 | 26 European top class sniper rifles use CHF barrel a lot, and the accuracy is
stunning.
For example, Steyr use their 23.6" CHF barrel on SSG08 .308win, and the
accuracy guarantee is 1/4MOA out of box
1/4MOA!!!!!!!!
I can't remember there ever exist another brand that dare to claim this. |
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m*****8
发帖数: 292 | 27 google it.
https://www.google.com/#hl=en&rlz=1C2RNAN_enUS447&tbm=vid&sclient=psy-ab&q=
ak+74+accuracy+test+moa&oq=ak+74+accuracy+test+moa&gs_l=serp.3...17337.18021
.3.18252.4.4.0.0.0.0.100.395.2j2.4.0...0.0...1c.fgpMnHY28P0&pbx=1&bav=on.2,
or.r_gc.r_pw.r_qf.,cf.osb&fp=f030eada7af36c49&biw=1280&bih=607
"1 MOA AK-47 Iron Sights" by Nutnfancy
3 shot groups 1 MOA with AK Yeah Right Nutter ...
ARSENAL SGL21/SGL31: "The AK Gold Standard Pt 1" by Nutnfancy |
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m*****8
发帖数: 292 | 28 Herter's Select Grade Handgun Ammunition
See Select Items on Sale
Regular Price: $12.99 - $31.99
Sale Price: $9.99 - $31.99
Use Coupon Code: 72HOT for $5 flat shipping on orders $150. Free in-store
pickup. Loaded with pride in the USA using high-quality powders, bullets,
primers and brass cases to ensure the performance, reliable feeding and
consistent accuracy that serious shooters demand. Herter’s Select-Grade
Handgun Ammunition offers a large selection of today’s most popular
centerfire handg... 阅读全帖 |
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l******e
发帖数: 956 | 29 其实并不是速度越快越准。弹头的形状决定的。
http://www.pyramydair.com/article/Velocity_and_Pellets_April_20
...Olympic target airguns seldom shoot pellets as fast as 600 f.p.s., yet
they will outshoot almost any other pellet gun at short ranges. The target
air pistols are nearly as fast as the target rifles - ranging from 450 f.p.s
. to 580 f.p.s. Both target rifles and pistols shoot wadcutter pellets with
flat noses that cut perfect holes in target paper. Wadcutters are the least
aerodynamic pellets on the market, b... 阅读全帖 |
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d*****n
发帖数: 908 | 30 HANDGUN AMMUNITION:
SELF DEFENSE
Ammunition manufactured in the United States is among the finest in the
world. For intended defensive uses, the gun owner will not go wrong in
selecting ammunition produced by the most widely recognized manufacturers.
These include CCI/Speer, Cor-Bon, Federal, Remington, and Winchester.
Allow no margin for error in protecting one's life. Avoid potentially
unreliable ammunition that is hand loaded, re-loaded, or of dubious quality
foreign manufacture when ch... 阅读全帖 |
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h*******g
发帖数: 2201 | 31 Believe it or not, the Norinco 7.62 surplus ammo are the best accuracy
milsurplus you could get, they give very good accuracy, maybe as good as the
match grade. The problem in US is, after the Bill Clinton Ban in 94, no
more, no more. All you get is Tula rubbish. |
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k*******n
发帖数: 5546 | 32 赞精神，这么多钟子弹也不少钱了。
1:7缠距就是为打重弹。不过一般买来LW不都是用来突突的吗？
单纯考虑管子精度，我记得杂乱看过一些,比如Mr Noveske指定PacNor用设备按要求做
出blanks,然后再自己完成不锈钢管子的最后成品工序。还有枪机和枪膛的fitting...
这里是LMT：
LMT- Lewis Machine and Tool. I just learned some interesting history about
LMT tonight. Apparently Karl Lewis was one of the founders of Eagle Arms,
which was a retail business run beside LMT until Eagle was sold to Mark
Westrom. Westrom later obtained the rights to the Armalite brand, and
combined the two. This info is from an article by Zak Smith... 阅读全帖 |
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h*********r
发帖数: 1943 | 33 据说枪管不锈钢还有个问题是冷脆，低温环境下强度不是很好
枪管精度我觉得和是否冷锤锻没关系，关键是以什么精度标准做冷锤锻。Steyr、Sako
、FN、PGM、UA等一系列欧洲高精度狙击步枪几乎一水儿的用冷锤锻，Accuracy
International以前用切削，现在不知道是不是还在用，但Accuracy International枪
的精度口碑一般 |
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r*******0
发帖数: 706 | 34 http://www.slickguns.com/product/pmc-223-bulk-ammunition-dry-bo
Description:
Use coupon code "2WINTER" for free shipping on orders over $99. PMC .223
Bulk Ammunition with Dry-Box
Unique rear-tapered boat-tail bullet provides greater accuracy
Free dry-storage box with every bulk purchase
Lead core is surrounded by a full metal jacket
Perfect for high-volume target shooting
Save money on quality .223 rounds and get a free dry-storage box with every
bulk purchase. These 55-grain rounds are great fo... 阅读全帖 |
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d**********g
发帖数: 2014 | 35 这个网站挺好的。
http://www.best9mm.com/compact9mm.html
我感觉先从轻的开始挑。
Compact 9mm Pistols for Concealed Carry
We didn't do a "best list" because your personal requirements for a
concealed carry pistol will not always be the same as ours.
The rules for the 9mm CCW list: Weigh 30 ounces or less, barrel 4.1 inches
or shorter, and cost less than $600 from a dealer. Most confrontations will
be at 7 yards or less, so any choice you make from the below list should be
good for concealed carry. Some of these compa... 阅读全帖 |
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C*******r
发帖数: 10345 | 36 A Texas startup has developed a "smart rifle"that barely needs to be aimed.
The maker of the gun, being shipped to stores this week, brags that "even a
novice shooter can become an elite long-range marksman in minutes."
The company, TrackingPoint, has said its "world's first" long range
Precision Guided Firearms (PGF) integrate precision hardware, digital optics
, and tracking technology to deliver an unmatched shooting experience. The
line of rifles starts at about $22,500 and each comes packag... 阅读全帖 |
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h**********n
发帖数: 394 | 37 背景：2012六月份时我侥幸以很低的价格从Buds Gunshop 拍到了一把当时新上市不久
的FNS-40。本来对这把枪的了解仅限于2012 SHOT Show, 只是当时价格实在太有诱惑力
，所以决定吃一次螃蟹。这篇review 的目的就是在这一年之际将我对FNS-40 的印象整
理出来，并且将FNS-40 与其它几种我使用过的Striker-fired 设计予以横向比较（
Walther PPQ 9mm & .40SW, Glock 19 Gen3 9mm, Caracal F&C 9mm).
I. 人机功效 Ergonomics 4.5/5 分
在我看来，不管一把手枪的性能怎样，一个优秀设计的重要原则之一是它是否舒适。如
果这把枪第一次上手，你就觉得这把枪握着别扭，那么又何必虐待自己去花时间和金钱
去适应一个不属于你的设计？从人机功效的角度来看，FNS-40 的设计是很成功的。FNH
把一个 compact size 的 slide 装到了一个 full size 的 frame 上，使得FNS-40
握在手里有很好的平衡和指向性。
1) 握把角度 & 轮廓： FNS40 采用... 阅读全帖 |
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S**********s
发帖数: 4534 | 38 DDm4 is not know for tack driving accuracy, it doesn't have a stainless
steel match grade barrel like some of the target rifles do, but rumor says
it could shoot around 1 moa with good ammo (as do most decently built ARs)
Pws shouldn't be very far behind on accuracy, the newer mk1 has a wylde
chamber and finally free floating handguard.
With either choice don't think you will be disappointed.
is |
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l*****8
发帖数: 106 | 39 参考大家的意见，又要实惠，定了下列望远瞄准镜。
今天打了五十发.223，又加五十发5.56，靶距25yards, 发发中靶（A4)，但眼睛太费劲
，一定要望远镜。
Bushnell AR223 Rifle Scope 3-12X 40 BDC Matte 1" Tactical design scopes for
your AR or Modern Sporting Rifle, Tactical Turrets Calibrated for .223Rem
AR931240
Product Description
AR Optics 3-12x40mm Riflescope
Versatile optic featuring target turrets, side parallax adjustment and our
Drop Zone 223 BDC reticle to accurately place rounds on target out to 600
yards.
Drop Zone 223 BDC reticle
Second focal plane
Fully m... 阅读全帖 |
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h*d
发帖数: 19309 | 40 LAS VEGAS — The U.S. military has begun testing several so-called smart
rifles made by the applied technology start-up TrackingPoint Inc., company
officials said.
The Army is rumored to have acquired six of the precision-guided firearms,
which cost as much as $27,000 apiece. Oren Schauble, a marketing official
with the Austin, Texas-based company, confirmed the military bought a
handful of them in recent months for evaluation. A spokeswoman for the
service didn’t immediately respond to an e-mail... 阅读全帖 |
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h**********r
发帖数: 2284 | 41 For reliability or durability, I don't have much comment based on personal
experience.
However, in terms of ACCURACY, I personally tried many different models,
back to back. Glock 19 Gen 4 has equal accuracy as many other high priced
pistols including the HK 9mm counter part. There's no doubt about it and
many people I know all have the same/similar opinion. |
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A*******y
发帖数: 181 | 42 候选：
Accuracy International:
1. AWSM, 338, around $6000
2. AXMC 338, around $8000
3. AX50 (价格有点超过预算), 50 BMG, around $10000
Barrett:
1. M99, 50 BMG, around $3500
2. M82, 50 BMG, around $8000
3. MRAD, 338, around $6000
现在纠结点主要有3个，338还是50BMG, 拴动还是半自动(只有Barrett M82是半自动的)
, Accuracy International还是Barrett。 当然，价钱也很重要了。
个人现在倾向于AI AXMC 338, 但是Barrett M82价格差不多而且是半自动的。
请懂的朋友给些建议，多谢。 |
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a******1
发帖数: 1519 | 43 Fight science -MMA
Measure not only how much they dish out, but more importantly how much they
can take.
A display of strategy, anatomy and conditioning
Power and accuracy of punches and kicks
Bas Rutten
Angular acceleration: 6000 radius/s2, close to cause concussion with a
single punch
Hand strike: 941 lbs force
Deflection: 58-67 mm, i.e. 2.7 inches
VC: 2.0, (1.7 is safe)…
Left hook: 291 lbs force to the temple
The secret: power comes not just from muscular strength, technique is
perhaps more i... 阅读全帖 |
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Y******e
发帖数: 20256 | 44 好文。
我来补充一些：
俺老暂时目标不变，还是6-6 bowl game。大十的比赛，我到现在还看不出来RR有什么
方法制胜。防守不改4 man front，死路一条。要是光靠进攻撑着，搞不好剩下的6场也
就能赢2-3场。还得看rp。
本场比赛WR大失水准，不但drop pass，block的也不好。DR的INT除了他自己的问题，
也有教练play call的因素。前两个int主要是accuracy不够，第三个绝对是bad read，
扔到double coverage，但是没看到sideline的stonum, 15 yard半径内没人盯防。DR的
长传还是有待提高accuracy，没有touch, 长传的话DG都比他好。中距离不准，也和他
自己过度兴奋有关。但是这个问题只能等到off season解决。
先说说传攻：
其实RR的play设计得很好，我密上半场有好几个长传WR都wide open，DR传的不准而已
。看了今年的比赛，我密传球好，主要是yard after catch，WR拿球可以创造很多机会
，只要前面的WR/TE能block的好。而且传球play call都是让人捉... 阅读全帖 |
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i***d
发帖数: 1077 | 45 Newton's focus impressive
RB Marcus Lattimore also on the rise; NFL prospect Adrian Clayborn did not
show
By Todd McShay
Week 11 of the college football season saw upsets, shining moments and
stumbles. Here are the teams, units and players trending up and down after a
busy week.
Stock Up
[+] Enlarge
Dale Zanine/US Presswire
Cam Newton's showing against Georgia was more impressive given the questions
swirling around him.
1. Auburn QB Cam Newton
Newton has turned in some jaw-dropping performances ... 阅读全帖 |
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Y******e
发帖数: 20256 | 46 问题肯定很有。主要两个，以前说过了。1) a better RB to carry the load for DR
and make the defenders harder to defense. 2) DR's long throw accuracy. For
this, I'v seen some improvement along the season, but it's still quite
inconsistent. For example, he had great touches in 3rd qrt at UW game, but not so
much for the rest of the game. He tends to have less accuracy/lower
complete % in away game. |
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W********s
发帖数: 2256 | 47 When the presumptive No. 1 overall draft pick opts to go back to school, it
can really alter the draft process. As I detailed here, when Stanford QB
Andrew Luck made that decision, dominos fell. And in over 30 years of
evaluating talent, many of them for ESPN, this year sticks out as one that
could have a lot of movement throughout the process leading to the draft.
But it's time to get going.
As it is every year, the mock draft is a blend of my evaluations, hundreds
of conversations with people ... 阅读全帖 |
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p********y
发帖数: 5141 | 48 GPS positioning accuracy is normally greater than 10 meters at 90% percentile,
i.e. 10% of the time the positioning result for each calculation is more
than 10 meters off the ground truth. Depends on which GPS receiver they use,
what algorithm they use for localisaton etc. (I believe they definitely use
Kalman filter) And the accuracy also depends on what terrian you are in (
urban area with skyscrapers or open land in rural area), and how the weather
is (overcast or a bright day without clouds ... 阅读全帖 |
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