叶夜速写
悼念大地震死难者,国丧日期间保持铅灰
May 19th
谨此诚心悼念地震中的死难者,希望受灾者早日得到救援,早日恢复正常生活。
[[Image:Other/080519b.gif|550|中大校内举办烛光悼念活动,悼念大地震死难者]]
[[Image:Other/080519d.jpg|550|大学城多所高校亦有类似的烛光悼念活动]]
[[Image:Other/080519a.gif|550|除在露天场合举办烛光悼念活动外,亦有宿舍在阳台点烛以示悼念]]
[[Image:Other/080519c.jpg|550|19日14:28,汽笛长鸣,举国上下默哀三分钟]]
[[Image:Other/080520b.jpg|550|中大东校区的默哀地点为工学院广场,默哀开始前十几分钟已经有数百人聚集]]
[[Image:Other/080520a.jpg|550|国殇三日,天下缟素]]
注:以上图片均转载自互联网,版权归原作者所有
从Intel升级AMD的系统保持之道
May 13th
5月10日是个重要的日子!本人斥资采购的电脑新配件在这一天运抵家中,成为本人17年来的第5代电脑。第四代的配件最长已经有近8年的历史,它们在这一天大部分就正式退役了。
第四代主器件:华硕P4P800主板(5年),英特尔奔腾IV 2.0GHz CPU(5年),丽台GeForce 2 Pro显卡(8年)
第五代主器件:微星K9N Neo V3主板,AMD速龙双核2.4GHz CPU,七彩虹GeForce 8500GT显卡
忙碌了一个下午耐心地把新配件装好(不是我手生,而是机箱太脏了需要洗刷刷),结果一开机就蓝屏,上网一搜:一般升级主板都要重装系统,更何况是从Intel到AMD的“大跳跃”了!
怎么办?本机上一次重装系统还是2004年8月的事情了。由于安装了近百个程序,为打造一个舒适的工作网络而设置的诸多设定和环境变量,重装系统基本是等于一场灾难。所以对于我的电脑来说,我总是不厌其烦地天天进行安全检查,确保不会给病毒木马钻空子。于是便发挥每次遇到困难时的精神:不耻下问,四处搜索答案。经过三天的努力,总算在没有重装的前提下将硬件升级完毕,并进行了大半天的测试,未发现大问题。所以在这里简单记一下步骤,共后来人参考。
- 首先是备份系统文件,这是最重要的一步,在无路可走的话也可以退回原地;
- 进入设备管理器,将IDE控制器切换成“标准”,再把“计算机”选项卡下的ACPC更新成Standard PC;
- 关机,把新硬件换上去,注意除了显卡以外的PCI卡先别急着插,等到没问题以后再慢慢装也不迟;
- 如果你是Intel升AMD的话,80%的可能会出现这种情况:安全模式可以入,但正常模式一进去就蓝屏,显示0x07错误,这是因为载入了Intel的驱动引起的。先在安全模式下安装好新的硬件驱动,然后把\system32\drives\intelppm.sys删除或改名再重启,就可以进入正常模式了;
- 把第二步中的Standard PC改回ACPC。
祝各位升级愉快!
参考资料:
http://digi.it.sohu.com/20060104/n241270288_1.shtml
http://hi.baidu.com/zhuo/blog/item/02f8b31c6897048887d6b6a3.html
尝试进步
May 7th
有不少朋友说我的博客事无巨细,以至于他们莅临本站只看照片,因为“文章太长,看着就怕”。
略微有点冤屈。椰子笔谈里的文章,我都修改到自觉得符合思绪以后才发上来,虽然不至于像曹雪芹那样修改几十次稿。
不过好的建议我就要采纳,因为我的读者是你们。
尝试着写小巧精致的文章,以及/或者小巧精致的连载。
大家先给点掌声吧。
OVOR试运行
Apr 9th
两个星期没写blog了,澳洲游记也是几乎没动笔,基本全部时间都奉献给了OVOR—— 新课题所用的重要程序。这个程序从1月中旬就开始开发,断断续续地进行了3个月,总算在4月7日可以总装测试,上线试运行了…… 其中极度令人郁闷的小bugs让我度过了一个烦恼的清明,不过还好,至少现在“可以转了”,虽然小问题还是很多。各位可以来这里看看archival:http://luss.y234.cn/transient/
本来打算前天写这一贴,结果拖到昨天,又拖到今天,老天对我的教训就是—— 昨晚由于程序编写时的疏忽使得程序陷入死冗,然后…… 今天一早起来发现服务器又挂了,不得不写信请Mike过来打圆场。
无论如何,我想OVOR的所有工作可以在4月上旬基本结束,然后就可以开始继续开发万众期待的7Timer!(多用途自动数值天气预测系统)—— 对不起哈各位,的确是我说过在2007年3月前就可以开始运行的,结果现在八字基本还没一撇…… 自从1月25日以来7Timer!就处于完全停工状态,不过我想它应该很快可以继续取得进展了,各位记得给我施压哈!
澳洲札记尚未结束—— 各位!
Mar 26th
有朋友问我是不是澳洲札记就这么多,唔—— 知道我的博客有这么多人关注,还是蛮开心的—— 这里就告诉大家,按照写作计划,还有至少7篇澳洲游记尚未动笔呢,当然随它们而出的还有若干精彩照片啰!另外台湾游记还有1篇未完成,搁了半年了,希望在完成澳洲游记之后能尽快摆平它。
写作计划搁置,自然是因为最近的大型软件工程—— OVOR,我已责令自己在最迟3月31日前将其上线测试。至于这个传说中的OVOR是什么呢?啊啊,暂时卖个关子,有兴趣的各位可以在QQ上适当骚扰我一下,我有空就和各位解释哈。
[zz]庆祝圆周率日
Mar 14th
圆周率的历史
古希腊欧几里得《几何原本》(约公元前3世纪初)中提到圆周率是常数,中国古算书《周髀算经》( 约公元前2世纪)中有“径一而周三”的记载,也认为圆周率是常数。历史上曾采用过圆周率的多种近似值,早期大都是通过实验而得到的结果,如古埃及纸草书(约公元前1700)中取π=(4/3)^4≒3.1604 。第一个用科学方法寻求圆周率数值的人是阿基米德,他在《圆的度量》(公元前3世纪)中用圆内接和外切正多边形的周长确定圆周长的上下界,从正六边形开始,逐次加倍计算到正96边形,得到(3+(10/71))<π<(3+(1/7)) ,开创了圆周率计算的几何方法(亦称古典方法,或阿基米德方法),得出精确到小数点后两位的π值。
中国数学家刘徽在注释《九章算术》(263年)时只用圆内接正多边形就求得π的近似值,也得出精确到两位小数的π值,他的方法被后人称为割圆术。他用割圆术一直算到圆内接正192边形。
南北朝时代数学家祖冲之进一步得出精确到小数点后7位的π值(约5世纪下半叶),给出不足近似值3.1415926和过剩近似值3.1415927,还得到两个近似分数值,密率355/113和约率22/7。其中的密率在西方直到1573才由德国人奥托得到,1625年发表于荷兰工程师安托尼斯的著作中,欧洲称之为安托尼斯率。
阿拉伯数学家卡西在15世纪初求得圆周率17位精确小数值,打破祖冲之保持近千年的纪录。
德国数学家柯伦于1596年将π值算到20位小数值,后投入毕生精力,于1610年算到小数后35位数,该数值被用他的名字称为鲁道夫数。
1579年法国数学家韦达给出π的第一个解析表达式。
此后,无穷乘积式、无穷连分数、无穷级数等各种π值表达式纷纷出现,π值计算精度也迅速增加。1706年英国数学家梅钦计算π值突破100位小数大关。1873 年另一位英国数学家尚可斯将π值计算到小数点后707位,可惜他的结果从528位起是错的。到1948年英国的弗格森和美国的伦奇共同发表了π的808位小数值,成为人工计算圆周率值的最高纪录。
电子计算机的出现使π值计算有了突飞猛进的发展。1949年美国马里兰州阿伯丁的军队弹道研究实验室首次用计算机(ENIAC)计算π值,一下子就算到2037位小数,突破了千位数。1989年美国哥伦比亚大学研究人员用克雷-2型和IBM-VF型巨型电子计算机计算出π值小数点后4.8亿位数,后又继续算到小数点后10.1亿位数,创下新的纪录。至今,最新纪录是小数点后12411亿位。
除π的数值计算外,它的性质探讨也吸引了众多数学家。1761年瑞士数学家兰伯特第一个证明π是无理数。1794年法国数学家勒让德又证明了π^2也是无理数。到1882年德国数学家林德曼首次证明了π是超越数,由此否定了困惑人们两千多年的“化圆为方”尺规作图问题。还有人对π的特征及与其它数字的联系进行研究。如1929年苏联数学家格尔丰德证明了eπ 是超越数等等。
背诵口诀
3 . 1 4 1 5 9 2 6 5 3 5 8 9 7 9 3 2 3 8 4 6 2 6
山巅一寺一壶酒,尔乐。苦煞吾,把酒吃,酒杀尔,杀不死,乐尔乐。
4 3 3 8 3 2 7 9 5 0 2 8 8 4 1 9 7 1 6 9 3 9 9 3 7
死珊珊,霸占二妻。 救我灵儿吧! 不只要救妻, 一路救三舅, 救三妻。
5 1 0 5 8 2 0 9 7 4 9 4 4 5 9 2 3 0 7
我一拎我爸,二拎舅(其实就是撕我舅耳)三拎妻。
8 1 6 4 0 6 2 8 6 2 0 8 9 9 8 6
不要溜!司令溜,儿不溜!儿拎爸,久久不溜!
2 8 0 3 4 8 2 5 3 4 2 1 1 7 0 6 7 9 8
饿不拎,闪死爸,而我真是饿矣!要吃人肉?吃酒吧!
(作者华罗庚)
圆周率前2008位
3.1415926535 8979323846 2643383279 5028841971 6939937510 5820974944 5923078164 0628620899 8628034825 3421170679 8214808651 3282306647 0938446095 5058223172 5359408128 4811174502 8410270193 8521105559 6446229489 5493038196 4428810975 6659334461 2847564823 3786783165 2712019091 4564856692 3460348610 4543266482 1339360726 0249141273 7245870066 0631558817 4881520920 9628292540 9171536436 7892590360 0113305305 4882046652 1384146951 9415116094 3305727036 5759591953 0921861173 8193261179 3105118548 0744623799 6274956735 1885752724 8912279381 8301194912 9833673362 4406566430 8602139494 6395224737 1907021798 6094370277 0539217176 2931767523 8467481846 7669405132 0005681271 4526356082 7785771342 7577896091 7363717872 1468440901 2249534301 4654958537 1050792279 6892589235 4201995611 2129021960 8640344181 5981362977 4771309960 5187072113 4999999837 2978049951 0597317328 1609631859 5024459455 3469083026 4252230825 3344685035 2619311881 7101000313 7838752886 5875332083 8142061717 7669147303 5982534904 2875546873 1159562863 8823537875 9375195778 1857780532 1712268066 1300192787 6611195909 2164201989
----- [1000] -----
3809525720 1065485863 2788659361 5338182796 8230301952 0353018529 6899577362 2599413891 2497217752 8347913151 5574857242 4541506959 5082953311 6861727855 8890750983 8175463746 4939319255 0604009277 0167113900 9848824012 8583616035 6370766010 4710181942 9555961989 4676783744 9448255379 7747268471 0404753464 6208046684 2590694912 9331367702 8989152104 7521620569 6602405803 8150193511 2533824300 3558764024 7496473263 9141992726 0426992279 6782354781 6360093417 2164121992 4586315030 2861829745 5570674983 8505494588 5869269956 9092721079 7509302955 3211653449 8720275596 0236480665 4991198818 3479775356 6369807426 5425278625 5181841757 4672890977 7727938000 8164706001 6145249192 1732172147 7235014144 1973568548 1613611573 5255213347 5741849468 4385233239 0739414333
4547762416 8625189835 6948556209 9219222184 2725502542 5688767179 0494601653 4668049886 2723279178 6085784383 8279679766 8145410095 3883786360 9506800642 2512520511 7392984896 0841284886 2694560424 1965285022 2106611863 0674427862 2039194945 0471237137 8696095636 4371917287 4677646575 7396241389 0865832645 9958133904 7802759009
----- [2000] -----
94657640
按:传说今天是“白色情人节”,叹~ 人们太善于编造让两头动物有理有据地呆在一起的氛围了,难道一个Valentine's Day还不够吗!?看来上帝设计了相当多的诡计,以便使(大部分)人们在一些闭合的圆圈上耗费时间,不能去探寻他那王国的奥秘。正感慨上帝的狡诈,忽然发现今天原来是“圆周率日”!哈哈,对于这个可爱数字的节日,怎可以不庆祝庆祝呢?各位,友情提示:今天是“圆周率日”!以上内容转自http://baike.baidu.com/view/3287.htm
Tour completed
Feb 28th
[[Image:08-Australia/O001.JPG|550]]
When there is a start, there will be an end, so does my tour in Australia.
It's certainly an enjoyable journey, or should say, a out-of-expectation journey. I traveled for more than 5,000 kilometers in just two weeks, visit great places, meet great people, take great photos, all of all are so pleasant. But exciting and remarkable experience needs both good starting and good ending. When I arrive the "truely" home at around midnight on Feburary 29, I can annouce "tour completed!"
Firstly my most grateful thankness goes to my relatives in Australia, my grandpa, uncle John and Bob, my aunties and cousins. I stay in their house and they drove me out to see place of interests. If their helps were not present, a pleasant journey would be impossible for me. The same thankness goes to cousin Sean's cat Claw, she stay with me when I was alone in uncle John's house and we became rather good friends.
Then I would like to thank my dear friend Ashley Chan, and her family -- uncle, auntie, her cousin Karmen and Angela, and their dog, Prince. Thanks them for accommoating and driving me around at Wagga Wagga. For Ashley, I would greatly admire her courage and determination, I would like to pass my best wishes for her in this post as well.
I would like to thank Michael and Angela for the helps they gave during my trip on Melbourne, especially for the b.b.q. kangaroos. Wish them to have a pleasant honeymoon in China.
I would like to thank Simon for showing me around the famours Mt. Stromlo Observatory and the campus of RSAA/ANU.
I would like to thank Robert and Donna, who were so kind to drive for two hours to pick me up from Gunnedah and show me around at Siding Spring. I had also learn a lot from Robert, and extra thanks to him for the poster of Great Comet McNaught, the comet which is his most famous discovery.
I would like to thank Miss. Sue for her great meal.
And thankness also goes to all other people, known or unknown, who have lend me their hands during the great tour.
Although the ending is far from best due to the disappearance of my luggage, I won't let my excitement ruined. Touring diary in Chinese and beautiful photos would be followed after I take time to write and process. Ahh, surely have to wait after I have process all the headache things about the missing luggage with Vivamacau! \_/ and I have to annouce that all the gifts were placed in it...
[[Image:Other/080229a.jpg|550]]
The day at Siding Spring
Feb 25th
Although I sleep at 2 a.m. last night, I woke up at 8 a.m. in the morning. It's already pretty sunshine outside. At 10 a.m. Rob came and guided me to the 3.9-m Anglo-Australian Telescope (AAT). I'm very lucky because today they are going to remove the 16-t mirrow for maintanence, which occurs only once a year. The procedure will take a whole day to complete so we only checks at some important time. By the way -- the 3.9-m AAT is also the largest telescope I have ever seen.
After short checks on the AAT, we went to see the 1.2-m UK Schmidt, visit the observatory shops and have lunch, have a great chat with the assistance (she's not a professional but an astronomer -- it's still pretty nice to me the way she works, although not a professional one). After that we went back to the AAT, and the 16-t, 3.9-m giant had just been removed, and we watch it was put onto the ground floor. After that we still visit the 1.0-m and the 2.3-m AAT telescope (it marked the second biggest I had ever seen), and see the in-built Sky Mapper dome in distance.
The weather became very clear today (last night it wasn't, but Rob still show me the software and facility of Siding Spring Survey). At sunset, quite a number of kangeroos went out and ate grass, and we observed a nice sunset at just outside the dome of the 3.9-m.
[[Image:Other/080225a.jpg|550|In the 3.9-m AAT dome -- the telescope is too large to be include in this photo]]
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