r*****t
发帖数: 286 | 1 ☆─────────────────────────────────────☆
jiahe (JiaHe) 于 (Sat Apr 28 22:15:24 2007) 提到:
发信人: jiahe (JiaHe), 信区: Statistics
标 题: 问个概率题
发信站: BBS 未名空间站 (Sat Apr 28 22:15:05 2007)
不是什么家庭作业，呵呵
My telphone rings 12 times each week, the calls being randomly
distributed among the 7 days. What is the probability that I
get at least on call each day ?
answer provided is: .2285
my answer is .02488
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BulletTooth (DesertEagle.50) 于 (Sat Apr 28 22:17:28 2007) 提到 |
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b**a
发帖数: 61 | 2 hehe, who care?
jiahe is so cute
//nod
//spank jiahe
//addoil jiahe |
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i******r
发帖数: 1175 | 3 Parcel Number 440120-0190
Name WANG HELEN JIAHE+COSTELLO A
Site Address 17444 NE 97TH WAY 98052
Legal LOOKOUT RIDGE
好像是老中的房子，8/2/2007 $829,000.00 KILGORE BENJAMIN F+JUDY A WANG HELEN
JIAHE+COSTELLO ADAM M Statutory Warranty Deed。 |
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B*********h
发帖数: 800 | 4 ☆─────────────────────────────────────☆
jiahe (JiaHe) 于 (Tue May 15 11:43:09 2007) 提到:
以前的讨论不知道有没有O(log(n))的定论。
下面是我的解法，请指正。
robertt的解答大家可以找到，O(m+n)
不过这里是 n*n 的 square matrix
1. $A_{i,i}
2. if $A_{i,i}
3. if $x > A_{i+1,i+1}$, $x\in A\\A_{[i+1,n],[i+1,n]}$
4. if $A_{i,i}
5. searching for $i$ is $O(log(n))$, search in $[i,n]$ is also $O(log(n))$.
3 log(n) in total.
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B*********h
发帖数: 800 | 5 ☆─────────────────────────────────────☆
fololunsia (我心飞扬) 于 (Fri May 18 14:50:36 2007) 提到:
发信人: fololunsia (我心飞扬), 信区: JobHunting
标 题: NxN行列有序的矩阵查找一个数，如何O(N)时间？
发信站: BBS 未名空间站 (Fri May 18 14:50:24 2007)
NxN行列有序的矩阵查找一个数，要O(N)的时间复杂度。如何解？
以前这里有人给过答案的.我忘了。。。
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jiahe (JiaHe) 于 (Fri May 18 16:11:44 2007) 提到:
see my post
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NevSay (不说) 于 (Fri May 18 16:22:50 2007) 提到:
even log_4 (n)?
divide and conquer:
divide t |
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b***k
发帖数: 2673 | 6 ☆─────────────────────────────────────☆
california12 (央视1台) 于 (Mon Jan 28 03:08:42 2008) 提到:
E(x), and x is normal distribution, say Norm(a,b).
另外一个是积分，从０到无穷大，算e^(-x^2)的积分，谢谢了。
版上有牛人的八。
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jiahe (JiaHe) 于 (Mon Jan 28 03:27:38 2008) 提到:
第一个没看懂，求一个正态分布的数的平均值么？
第二个，求它的平方，最后开根号。
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littlebro (littlebro) 于 (Mon Jan 28 04:17:39 2008) 提到:
E[x]=a if you understand what Norm(a,b) notation means.
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p********a
发帖数: 5352 | 7 ☆─────────────────────────────────────☆
jiahe (JiaHe) 于 (Sat Apr 28 22:15:05 2007) 提到:
不是什么家庭作业，呵呵
My telphone rings 12 times each week, the calls being randomly
distributed among the 7 days. What is the probability that I
get at least on call each day ?
answer provided is: .2285
my answer is .02488
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dragoninsea (龙哥) 于 (Sun Apr 29 10:56:07 2007) 提到:
是古典概率问题。
分母是７的１２次方
分子稍微复杂点，由６部分组成
6111111
5211111
4311111
4221111
3321111
2222211
这６部分可由组合公式计算。
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A*********u
发帖数: 8976 | 8 ☆─────────────────────────────────────☆
jiahe (JiaHe) 于 (Tue Jan 29 02:31:20 2008) 提到:
是不是有点混淆了 最大概然数 跟平均数？
能否给个直观的解释？
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geography (地理) 于 (Tue Jan 29 09:55:55 2008) 提到:
Ex=X*P{x
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bdr (spruce) 于 (Tue Jan 29 11:37:54 2008) 提到:
X takes values 2^1, 2^2, 2^3, ....
Each with prob. 1/2, 1/2^2, 1/2^3, ...
You have , P(X< inf) = 1; EX = inf.
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kosine (仰视星辰) 于 (Tue J |
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d**********0
发帖数: 13081 | 9 Ships scuttled in Jiangyin (Kiangyin) on Aug 12:
cruisers (sloops):
Datong/大同
Ziqiang/自强
training ship:
Tongji/通济
seaplane tender:
Weisheng/威胜
Desheng/德胜
gunboat:
Wusheng/武胜
torpedo boat:
Chen/辰
Su/宿
merchant ships:
Jiahe/嘉禾
Xinming/新铭
Tonghua/同华
Yushun/遇顺
Taishun/泰顺
Guangli/广利
Xingshi/醒狮
Huaxin/华新
Huai'an/迴安
Tongli/通利
Ningjing/宁静
Kunxing/鲲兴
Xin Ping'an/新平安
Maoli II/茂利二号
Yuanchang/源长
Muyou/母佑
Huafu/华富
Dalong/大篢
Tonghe/通和
Ruikang/瑞康
Gongping/公平
Wanzai/万宰
Yongji/泳吉
these ships were scuttled togeth... 阅读全帖 |
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s******l
发帖数: 5529 | 10 前两天看了一个印度片不错，《未知死亡》。
既有温馨浪漫的爱情故事，又有冷酷的复仇故事，也有异域风情的歌舞。女主活泼可爱
，表演生动。是个适合娱乐消遣的商业片。
◎译 名 未知死亡/复仇之路/凶心人在宝莱坞
◎类 型 惊悚
◎片 名 Ghajini
◎年 代 2008
◎国 家 印度
◎类 别 动作/剧情/神秘/爱情/惊悚
◎发行公司： Geeta Arts
◎官方网站： Official site
◎语 言 北印度语
◎字 幕 中英双字幕
◎视频尺寸 624 x 256
◎IMDB评分 7.0/10 3,061 votes
◎文件格式 RMVB
◎片 长 3:04:44
◎导 演 A.R. Murugadoss
◎编 剧 Writer：A.R. Murugadoss ....writer
◎主 演 阿米尔·汗 Aamir Khan
阿辛 Asin Kalpana
吉雅·罕 Jiah Khan
制作人 Produced by：
Allu Aravind ....producer
Madhu Mantena Varma ....producer |
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m*****i
发帖数: 1205 | 13 Posting unsolicited messages to NewsGroups is also
called SPAMMING. If you ever read any terms and conditions
of commercial ISPs etc., you certainly would know that.
This applies to Bulletin Boards as well. As for people
sending thousands of articles, it is still up to
the sysop and the existing rules of the place he's doing
that. Jiahe sent 200 articles to Girl board, both
breaking the rule of this BBS and against the warning of the adms,
that is considered as SPAMMING. |
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m*****i
发帖数: 1205 | 14 OK, I personally don't think it is practical to really go to
the FBI. They probably won't even establish a case (not serious
enough). So I don't want to dig into the legal aspect of this.
However, if jiahe kept doing that, this can certainly
be brought up to the computer adms of his university.
One very likely result is that his computer privileges
being (partly or fully) revoked, and it could result in his
being expelled from school as well. |
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