w**d 发帖数: 2334 | 1 没说准确。其实是教的不容易,觉得小孩子的注意力不行。更主要的是小孩的知识点缺
不少,对抽象的东西很难把握。 就像最开始的时候要去证明题目里头定义的算子是
commutative,associative, 小孩子几乎是无可适从,即使讲明白了该怎么去验证。现
在正在教解最简单的方程和不等式,发现讲一两个例子都不够,让他们依葫芦画瓢都有
困难。 不知道是不是我教的不对,还是他们的练习太少?我们一周就一次课,45分钟
。多讲两个例子的话,很容易把进度拉得很慢。
说到底,可能还是每个topic上花得时间不够,练习太少。aops这一系列的书很罗嗦,
后来几乎都有重复。比方说那个prealgebra里头的数论在introduction to number
theory里头又占了5,6章的篇幅。所以我现在也没有指望他们把学得东西都弄的滚瓜乱
熟。 |
|
w**d 发帖数: 2334 | 2 只是让他们随便试了下,发现不行,就没有强求了。AOPS的书里头颇有几道那样的习题
,我都让他们跳过了。
我后来讲解方程和不等式的时候,也是按照逻辑的路子讲的 - 目前的题太简单,不需
要什么技巧。然后发现也有点问题。
吧? |
|
w**d 发帖数: 2334 | 3 具体挑哪些得看教的目的。我是按一般竞赛的想法去教的,如果只有个别孩子跟不上的
话,我不会去放慢进度。如果都只是当作一般的课后补习的话,我说不定后来就不想教
了。目前的想法还是先把aops的introduction这一套全讲完 |
|
h*****m 发帖数: 1034 | 4 最后一段很有启发,有的人学习的知识如果看不到有什么用处,可能兴趣会打折扣。
三角函数对于比较高等的数学物理很有用处,对于低年级学生可能会对有用性理解不了。
或许,这是AOPS把它放在precalculus里的原因。 |
|
h*****m 发帖数: 1034 | 5 理解,其实我也就开始时讲清楚了,后来也没有太花时间。
我甚至都不想让他练习太多的两位数乘法,毕竟不是训练人肉计算器。
对了,你之前提到教小孩子prealgebra有点难。我看大儿子做的5年级beast academy里
面这两天都是在解简单的一元一次方程。我想是不是AOPS默认为开始学prealgebra的孩
子都有一定基础了,所以书里面讲得就比较难了? |
|
x*****1 发帖数: 201 | 6 也觉得beestar的暑假GT题目启发性很强了,我孩子以前没有训练过,所以每题都能学
点东西。暑假就是让孩子多睡觉,休息好,不过说实话,我们学校一年都是放羊的,学
的东西很少
等孩子中学了, 再去试aops |
|
u***************r 发帖数: 11227 | 7 发信人: layin(谎言), 信区: Returnee
标题: 什么人应该从美国滚回去?(转载)
发信站: BBS未名空间站(Mon Oct 23 07:40:33 2017,GMT)
刚才 在独立评论上 Aops 对博讯螺杆说 ”if you don't speak English go home
意思说你不会讲英语, 就从美国滚回去。 这种说法我不同意,语言并不是一门高深学
问,但是与学的年纪有很大关系,生在美国的孩子没有一个英文不好的, 我儿子上高中
来美, 我女儿上小学来美, 女儿的英语比儿子好得多, 到了五十后学英文就非常困难。
我三十多岁开始学英文, 而且在美国取得博士学位, 但是英文也只是半吊子,一般
生活可以,读一般书可以, 但是到了专业领域,譬如到了医院里,很多医药名字就听
不懂,至于用英文写作,写的完全是中国英文,所以我至今不敢翻译自己的作品到英文
去。所以上面的说法对老人是很不公平的。
但是我赞成:
如果入籍时宣过誓, 而待在美国大骂美国,夸中国的人应该滚回去。 为什么呢? 让
我们看看誓言是怎么说的:
“我完全放弃我对以前所属任何外国亲王、君主、国家或主权之公... 阅读全帖 |
|
|
S********y 发帖数: 33 | 9 My group has one contractor position. Let me know if you are interested.
JOB TITLE
* Senior Java Developer with experience in Data Warehouse
SKILL OR EXPERIENCE:
* Should have over 7 years of experience
* J2EE, Design patterns, Spring Framework (Spring core, MVC, Transaction
Management, Annotation, Acegi, AOP), Hibernate 3.x or iBatis
* Ability to develop and understand complex SQL statements
* Working experience with Oracle Data Warehouse. Performance tuning with
SQL and PL/SQL is a plus.
* AJA |
|
s*******l 发帖数: 3691 | 10 我有些问题:
1.我本人是否可以用AP出去再回来?会影响我的H1B身份吗?
2.配偶用AP回来,是否变成AOS,不再是H4了?
3.如果配偶用EAD工作,是否身份就是AOP不是H4了?
4.如果不幸485悲剧,配偶用了EAD工作,是否就要立刻走人,但是本人H1B还在,不用
立刻
滚蛋?
老婆有了EAD和AP,这样回去就不用签证折腾,你们的建议是什么?
是否还是要继续保留H1/H4身份,即使有AP也不用? |
|
y***y 发帖数: 4957 | 11 替朋友问的
NSC center, EAD/AP combo 卡第二次renew,七月中旬主副申请人的材料放在同一个
package里面递交的。
副申请人八月底收到 EAD/AP combo card, 2 years.
主申请人九月底先收到两张AP 纸,一年有效。两周后收到 EAD card, 两年有效,但是
注明不能用来入境,非combo card。
主申请人一直用H1B 工作,收到第一次EAD/AP combo card 后还用H1B 签了一次签证,
去年年底入境用H1B 签证入境。
副申请人去年年底用EAD/AP combo card 入境。
问题一:这是为啥?
问题二:如果接下来一年内主申请人用 AP纸 入境,入境后到底是H1B状态,还是AOP
status? (H1B 两年内都有效) |
|
m*****u 发帖数: 5534 | 12 以下是所有谜语,中间有3个过于生僻被删掉了。一共112个。
1.啄木鸟
打一字
2.喜上眉头
打一字
3.差一点六斤
打一字
4.家中添一口
打一字
5.人说多子为好我说少生为妙
打一字
6.生产必须出正品
打一成语
7.挑嫩的
打作家名一
8.赤橙绿蓝紫
打一成语
9.你一半,我一半同心干,把树砍
打一字
10.自大一点
打一字
11.陕西省,陕西省西安人
各打一字
12.桃花潭水深千尺
打一成语
13.一千零一夜
打一字
14.要一半 扔一半
打一字
15.上气接下气
打一字
16.合二而一
打一字
17.拆去一点
打一金融名词
18.一来再来
打一字
19.有一半,有一半,又有一半
打一常用语
20.晖
打一成语
21.半
打一成语(提示:和“末”比较)
22.一撇一竖一点
打一字
23.鹊巢鸦占
打一成语
24.千里挑一
百里挑一
打一字
25.防空导弹
打一成语
26.爱当跳伞员
打一成语
27.不合理
打一成语
28.黑天吃柿子
打一口语
29.一字十三点
难在如... 阅读全帖 |
|
p**********u 发帖数: 15479 | 13 drei哥啊,我酒量不好。另外酒也不好。别提了,就看见一个product of france,连
个AOP都没看见。我边上的哥们,还笑话我,说这酒大概就相当于我们这里炒菜用的加
饭酒。
对了,drei哥,向明女神年轻未婚时去的那些bar,里面喝的鸡尾酒什么的,都是用什
么档次的酒调的?是不是翻译成国货,就类似说2锅头40v/v%,加饭酒30v/v%,外加
coca cola填满余量? |
|
k***a 发帖数: 2400 | 14 这里小学弄math olympiad, 初中math count, 高中AMC。
Resources
http://www.artofproblemsolving.com/
Offers reasonably-priced online courses, books, and forums on a variety of
math topics. AoPS also runs the USAMTS contest. |
|
a*****0 发帖数: 3319 | 15 多谢。他不厉害,但不笨,self-control极差。是在抓他数学竞赛,可他也是被动的。
数学aops全套书买了,也不看。mathcount书也买了,也不看。只能给他报课,平时报
,暑假也报,至少混在那里。也经常作业不做。但数学的确是他所有课业里最好的。我
的确要tough起来,不能再总是妥协。 |
|
b*****d 发帖数: 184 | 16 Inaccurate statement...I do not think MathCounts "reuse" problems in
official contest.
I specifically asked a renowned MathCounts coach this question about the
national countdown and the coach said THE KIDS HAD TO CALCULATE EVERYTING ON
THE FLY. These kids are just fast. I also asked my son when he shouted
out the answer before I even finished reading the question, was it because
he memorized the answer? He said NO, he just calculated it really fast.
Of course, if you go to practice website ... 阅读全帖 |
|
v******o 发帖数: 3417 | 17 感谢前面有同学推荐的AOPS,昨晚去注册了。跟孩子一起去FTW围观了几组countdown。 |
|
W*******e 发帖数: 1268 | 18 jQuery在27中没提名字,JavaScript framework基本上就是jQuery, Ext JS和Dojo,有
人喜欢YUI,个人不怎么喜欢。
Jboss和JMS在8和15中简单点了一下,glassfish server确实忘写了,还有就是Jetty。
没怎么用过GIT和hudson,确实需要学习。还有个很多人喜欢的jira也是比较头大的。
Java AOP看来没人关心,能用到的地方确实不多。
CMS感觉常用的就是Rhythmix Percussion和Oracle CMS,基本上就是用Velocity做模板
和Oracle Intermedia,Oracle Text和Oracle IDS。
.. |
|
e********e 发帖数: 6961 | 19 具体时间及电视台,请参考
http://www.tvguide.com/special/winter-preview/calendar2.aspx
01.24
HOPE FOR HAITI
Big Love S:4 Ep:3
Family Guy S:8 Ep:10
Hustle S:6 Ep:4
01.25
(HIMYM,AOP,2.5Men,TBBT,Miami停播)
24 S:8 Ep:5
Anthony Bourdain: No Reservations S:6 Ep:13
Castle S:2 Ep:14
Chuck S:3 Ep:5
Good Eats S:13 Ep:15
Greek S:3 Ep:11
Heroes S:4 Ep:1 |
|
t***u 发帖数: 20182 | 20 尼玛,跟这个aop一个德性,回复的帖子要10几秒才发的出来,还特别耗内存,不能不
说好就不给我50啊
[在 mitbbs (未名空间) 的大作中提到:]
:1.活动时间:即日起至美东时间2015年12月31日。
:
:........... |
|
f**********r 发帖数: 18251 | 21 【 以下文字转载自 Military 讨论区 】
发信人: wep (买不到鸡蛋了!), 信区: Military
标 题: Re: 林宝红到底是去上海哪个学校赚卖国钱 (转载)
发信站: BBS 未名空间站 (Tue Dec 3 02:21:21 2013, 美东)
上海交大
http://www.pibb.ac.cn/pibbcn/ch/reader/view_abstract.aspx?file_
中文关键词: 普适酶反应速率方程,动力学模型,系统生物学,酶动力学
英文关键词:generic enzymatic rate equation kinetic model systems biology
enzyme kinetics
基金项目:国家重点基础研究发展计划(973)资助项目(2010CB529200, 2007CB914700)
作者 单位 E-mail
徐岷涓 上海交通大学系统生物医学研究院,系统生物医学教育部重点实验室,上
海 200240 m*******[email protected]
朱晓梅 GenMath, Corp.... 阅读全帖 |
|
|
f**********r 发帖数: 18251 | 23 【 以下文字转载自 Military 讨论区 】
发信人: wep (买不到鸡蛋了!), 信区: Military
标 题: Re: 林宝红到底是去上海哪个学校赚卖国钱 (转载)
发信站: BBS 未名空间站 (Tue Dec 3 02:21:21 2013, 美东)
上海交大
http://www.pibb.ac.cn/pibbcn/ch/reader/view_abstract.aspx?file_
中文关键词: 普适酶反应速率方程,动力学模型,系统生物学,酶动力学
英文关键词:generic enzymatic rate equation kinetic model systems biology
enzyme kinetics
基金项目:国家重点基础研究发展计划(973)资助项目(2010CB529200, 2007CB914700)
作者 单位 E-mail
徐岷涓 上海交通大学系统生物医学研究院,系统生物医学教育部重点实验室,上
海 200240 m*******[email protected]
朱晓梅 GenMath, Corp.... 阅读全帖 |
|
g*****g 发帖数: 34805 | 24 这不是扯谈吗,JEE的那一套东西C/C++根本就不做。比如,IOC跟AOP
这两个基本概念,你问问周围的C++开发者有几个知道怎么回事的。 |
|
|
e***g 发帖数: 158 | 26 i'm a little worried that java language is becoming too complicated.
it's very hard to know what is essential, sun is reluctant to add new things.
generic java had existed for many years, it only goes to standard language
because of microsoft's theat. aspectJ is unlikely to have that chance.
by architects I refer to those senior developers in a project team who does
more infrastructure works than normal chors. |
|
m******t 发帖数: 2416 | 27
That's exactly my impression on JDK 1.5. Java is losing its elegance
as a language - I mean, come on, varargs? it's like hijacking us
back to C... |
|
e***g 发帖数: 158 | 28 I actually like varargs or new for. I do have many new Object[]{}
or for(Iterator..) messing my codes.
but System.out.printf()..... we all come from C era and knows how
to write and read that, but new kids are screwed, hehe |
|
m******t 发帖数: 2416 | 29
Is the whole "String s=(String)iterator.getNext()" business
cumbersome? sure. Is it worth it to make the langauge more
complicated just to deal with that? probably not. |
|
e***g 发帖数: 158 | 30 well you probably don't do coding a lot. i heard ppl worrying about
generics, static imports, but you are the first one opposing the
'enhanced loop'. this is a very trvial and straightforward syntax
sugar, it's so isolated and doesn't incurr wide-spread complexity
(auto-boxing is 10X, enum is 100X complicated, generics 1,000,000X)
and it indeeds simplifies a very commonly used part of language,
and welcomed almost unanimously (minus you:)
but syntax sugar is always a matter of taste, and who kno |
|
c*****a 发帖数: 15 | 31 I don't think those syntax sugar are any real benefits either. how often a
couple of more lines of typing is a serious problem for your productivity? On
the contrary, I would start to worry if programmers code too fast.
However, I will blame Microsoft for this. They always show off those eye
candies and try to prove the C# is better. I think Sun is dragged into this
war of features. |
|
m******t 发帖数: 2416 | 32 uh, embug, want to reconsider your "unanimously" statement? 8-) |
|
f*****g 发帖数: 31 | 33
In that case you can just have your own log filter,
pass the collection object rather than object.toString
to the log system. if(logger.isDebugEnabled()) is ugly
and may break the streamline of your code, should be avoided.
Use your own filter, or AOP. |
|
g****y 发帖数: 15 | 34 呵呵,那天没仔细看。
把没处理的exception都wrap成MyLibException,好像有问题,使用这个method的代码不
知道当MyLibException发生时,究竟是什么具体的exception。当然你在外面的代码里面
可以用myLibExceptin.getOriginalException()得到具体是什么exception,但编译器并
不会强制用户一定要处理这个exception,所以很有可能一些exception本来应该被处理的
,但用户忘了处理。这也是为什么declare method时强调要throw具体的exception class
,而不是throw一个throwable或exception。
exception handler的那个用法是可以的,是dependency injection的一个应用。但它同
样有上面说的那个问题。
用AOP的方法处理exception,也有同样的问题,看到的那些讨论认为这是一个缺陷。 |
|
m******t 发帖数: 2416 | 35 Replace sitemesh with jsf/facelets, and sprinkle some aop
here and there, and you pretty much have the front-end
architecture I'm working with these days.
1. Refactoring: it's a pain indeed - not only when refactoring,
but also when troubleshooting and apprehending.
My feeling though is that the answer lies in better IDE tooling
support and more rigorous testing, instead of moving most of
the stuff back into java code.
2. AJAX: I try to stay away from the "ajax wrappers" these days.
They are bas |
|
|
g*****g 发帖数: 34805 | 37 I would use AOP to log activities. User behaviors trigger certain
functions, you can monitor these functions and log/process them
(parameters, e.g inputs included) And later on you can find a way
to do analysis.
, |
|
g*****g 发帖数: 34805 | 38 It seems self-invocation is the problem for AOP, I have to find a way to
refactor the code and basically make this function in another bean so it's
called on a proxy, or I have to use aspectJ, ft. |
|
m******t 发帖数: 2416 | 39
Yes, that's pretty much it. It's a known limitation of spring aop. |
|
s******e 发帖数: 493 | 40 As magicfat said, it is spring's limitation.
to understand this, I just want to add my two cents.
Basically, there are three types of AOP
1. like aspectj, the aspect will be woven during compilation time
2. like jboss, the aspect will be woven during class loading time.
3. like spring, the aspect will be woven during run time. And remember that
everything(almost true) in spring is singleton.
Put this together, you can see that there is no easy way for spring to solve
this limitation. |
|
t*******e 发帖数: 684 | 41 Internal method calls bypass AOP proxy in Spring as well as Seam. The
keyword "this" is tough to handle in the proxy object.
There is a workaround, using Spring/Seam API to locate a proxied "this" bean, and invoking the internal method on the proxied "this".
In Spring, BeanFactory.getBean("this bean");
In Seam, Component.getInstance("this bean"); |
|
s******e 发帖数: 493 | 42 Even many terms are vague in cs.
But these two are not vague at all when we talk about language. actually
they are one of the criteria to distinguish a type strong langauge and a
dynamic language.
aspectj by nature is just another layer of compilation. actually no aop has
ever brought dynamic variable and dynamic functions to the table.
dynamic variable and fuctions are very useful when you do not know what and
how many things you want your object to carry at compilation time. |
|
g*****g 发帖数: 34805 | 43
This is largely due to that spring does it right first, (IoC, AOP,
POJO oriented, no do one thing with 3 classes), getting mature,
popular and adopted by many open source projects before ejb3 becomes
a spec. ejb3 is pretty much some good practices of spring and
hibernate, and some good features of RoR (convention over configuration),
and I am gonna give it credit for that.
Well, since spring 2.0 and especially after 2.5, you can configure most
spring components using only annotations too. So th |
|
w******n 发帖数: 692 | 44 最近没事在看Spring, 有没有比较好的Spring Demo code推荐一下,
最好是有AOP和Web Flow的。 |
|
t*******e 发帖数: 684 | 45 风马牛
struts I - MVC model 2
spring - AOP, DI
Hibernate - ORM
学学也好,不难学。 |
|
g*****g 发帖数: 34805 | 46 spring mvc和jsf属于竞争关系,不能混在一块用。
spring ioc, aop那些service layer的东西还是可以用的。 |
|
g*****g 发帖数: 34805 | 47 我觉得挺好的,大量的bean可以autowire,AOP相关的东西
简单很多,比如transaction.
等java class都deprecated. 新spring framework推荐使用annotation.没有深刻研究
,不过好像spring取消了很多inheritance.感觉上是比较简化了程序. |
|
F****n 发帖数: 3271 | 48 Actually what you describe does not sound like parent-child relationship in
conventional OOP. It is more like the multi-perspective problems addressed
by Aspect-oriented programming, as they point out sometimes there are needs
of multiple abstraction and OO hierarchies.
For example, in the main abstraction A is parent of B, but in another
abstraction B many be parent of A. Java cannot handle this. In C++ you can
tweak it with "friend" access. AOP is more structured handling of this. What
your de |
|
j********e 发帖数: 16 | 49 我也非常讨厌spring。 它那个AOP,我直接使用工厂模式就够了。
运行时注入,实在是无聊。 |
|