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全部话题 - 话题: solvers
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a*****e
发帖数: 21
1
公司叫MoneyLion ,是一个成长很快的FinTech startup, 个人感觉待遇算是不错,在
纽约和三番都有Office,不过目前在招的Backend engineer和Frontend engineer职位
都在三番。对靠谱Startup和FinTech公司感兴趣的请踊跃尝试,将简历发到ml.
[email protected]。
以下是Backend Engineer的Job description
MoneyLion is looking for a well-rounded developer that is proficient in both
API design and architecting event-driven backend systems. You will play a
critical part in the design, implementation, testing, and deployment of
RESTful API’s that will serve as the backbone to our portfolio ... 阅读全帖
a*****e
发帖数: 21
2
Frontend Engineer的Job description
MoneyLion is looking for a well-rounded front end developer that is
proficient in creating engaging experiences and is familiar with all aspects
of product development from ideation to implementation. You will play a
critical part in the design, implementation, testing, and deployment of our
consumer facing products, you will be instrumental in the architecture and
implementation of products handling millions of dollars' worth of financial
transactions. Our tech... 阅读全帖
b******b
发帖数: 21
3
Hi, all. We are looking for a summer intern, ideally a senior Ph.D student
specializing in Krylov solvers, to assist in an investigation of large
sparse unsymmetric linear systems. Candidates should be proficient in C or C
++. Knowledge of parallel computing and DAE will be a plus.
We are a small R&D group in a large semiconductor company in Dallas, Texas.
Forward your resume to b******[email protected] if interested.
b******b
发帖数: 21
4
【 以下文字转载自 Computation 讨论区 】
发信人: blueclub (侠之大者), 信区: Computation
标 题: R&D Engineer Position in Numerical Methods
发信站: BBS 未名空间站 (Tue Sep 18 00:04:19 2007)
Hi, all. We are looking for a strong numerical guy to help us with linear
solvers. The job description has been attached below. Please contact me at
b******[email protected] if interested. We also have some intern positions.
Regards,
Peter
l*********r
发帖数: 2
5
来自主题: JobMarket版 - Opening in Engineering Mechanics & FEM
Senior Scientist – Global Engineering and Materials Inc. has an immediate
full-time opening for this position in its NJ Office. The ideal Candidate
will have demonstrated in-depth experience in fields of computational
mechanics, mechanics of composite, and advanced structural analysis and
design. Experience in commercial FEM application and customization is
considered a plus. The successful applicant will work on physics-based
modeling, thermal-mechanical analysis, and advanced FEM solver develo
N******r
发帖数: 284
6
来自主题: JobMarket版 - 公司招聘 -嵌入式系统开发
公司招人:
需要具有嵌入式系统开发经验,熟悉系统底层驱动操作,EE/CS背景的技术人员一名。
公司可以办H1B。
地点:新泽西
公司不提供面试差旅费用,最好是新泽西附近几个州。
感兴趣的话发简历至 [email protected].
=======================================
Job Description:
We are looking for qualified and exceptional candidate (preferred
EE or CS Masters) interested in software/technical development in our
embedded
product development. Candidate must have experience of entire product
development cycle from design, development & testing.
If you are independent thinker, problem solver and una
T*****0
发帖数: 22
7
Location: Beijing, China.
Think about impacting one out of every two people online – in innovative
and imaginative ways that are uniquely ***! We do just that each and every
day, and you could too. After all, it's big thinkers like you who will
create the next generation of Internet experiences for consumers and
advertisers across the globe. Now is the time to show the world what you've
got and put your ideas and skills to work for over half a billion people. In
order to maintain our position as... 阅读全帖
e******r
发帖数: 18
8
来自主题: JobMarket版 - Job Opening - Fluid Mechanics
Job Opening
Schlumberger, a Fortune 500 Company, is a world-wide leading supplier of
premium products and services to the oil and gas exploration and production
industry, the petrochemical industry and other industrial markets. We are
seeking to hire a qualified candidate to fill the position of Engineer IV in
our Houston, TX location.
The successful candidate will be responsible for planning, organizing, and
executing design development projects resulting in the definition of new
products and... 阅读全帖
p*********4
发帖数: 9
9
来自主题: JobMarket版 - Need Strong C#, SQL Dev in Seattle
西雅图电脑公司招聘程序员。要求:
Strong C#, SQL, Perl. Good problem solver.
联络:p***[email protected]
电话:425 999 8422
s*******n
发帖数: 347
10
来自主题: JobMarket版 - [z] recruit math solver
post for my friends:
Hi there,
We are recruiting students to solve high school level math problems. Now it
is $0.75/problem.
Here is the link: http://www.slader.com/s/empkaWFtb25k
Enjoy
s*******n
发帖数: 347
11
来自主题: JobMarket版 - [z] recruit math solver
You can get 750 points = $0.75 for each math problem. When your points
exceed 10,000 = $10, you can get payment by your paypal account.
Here is the FAQ and Guide:
http://www.slader.com/contribute/FAQ/
http://www.slader.com/contribute/guide/
Tips: you can find some text books online from Google Books.
E-mail c*********[email protected] if you have any questions, but it's pretty
straightforward and all the information you need is easily accessible on the
website.

it
e******r
发帖数: 18
12
来自主题: JobMarket版 - Schlumberger Job Opening: Fluid Mechanics
Job Opening
Schlumberger, a Fortune 500 Company, is a world-wide leading supplier of
premium products and services to the oil and gas exploration and production
industry, the petrochemical industry and other industrial markets. We are
seeking to hire a qualified candidate to fill the position of Engineer III
in our Houston, TX location.
The successful candidate will be responsible for planning, organizing, and
executing design development projects resulting in the definition of new
products an... 阅读全帖
l**t
发帖数: 318
13
We’re searching some talents for follow positions from MNC R&D Center based
in Beijing China. Please contact l**[email protected] or changlijie-
1**[email protected] (MSN) for details if you are interested in any one of them.
Job Summary:
Job I: Math Review Engineer (Orientation: Math + Programming)
Job II: Senior L3 Support Engineer
Job III: Architect
Job IV: Product Technical Architect I
Job V: Product Technical Architect II
Job VI: Engineering Manager/Senior Manager
JOB VII: Service Engineeri... 阅读全帖
t**********c
发帖数: 331
14
来自主题: JobMarket版 - Customer Care Wanted
Customer Care Representative - 1st Shift position offers a true ground floor
opportunity for experienced, empathetic, dependable, team-oriented customer
service professionals to join our exciting, fast growing company. Using
creative, ‘out of the box’ thinking, this person will do whatever it takes
to exceed customers’ expectations and deliver a truly remarkable service
experience. Only individuals with outstanding work ethics, strong
verifiable references and “customer-first” mindsets need ap... 阅读全帖
T*****0
发帖数: 22
15
Hi, All,
If you have interesting in the following job, please kindly forward your
resume to n************[email protected] or contact 0086-13811923880 for more
details.
---------------------------------------------
Position: Director, Service Engineering
Location: Beijing, China.
Think about impacting one out of every two people online – in innovative
and imaginative ways that are uniquely Yahoo! We do just that each and every
day, and you could too. After all, it's big thinkers like you who will
crea... 阅读全帖
h*********e
发帖数: 247
16
【 以下文字转载自 JobHunting 讨论区 】
发信人: happychoice (快乐公主), 信区: JobHunting
标 题: IT公司招人,找工的兄弟姐妹看过来啦!
发信站: BBS 未名空间站 (Sun Mar 11 20:52:56 2012, 美东)
Location: LA
H1b/Green Card support
1. Critical Thinking Software Engineers (All Levels)
We are not a Java shop. We are not a Ruby shop, We are not a PHP, Perl or
Python shop either. We deploy the technology that best addresses the needs
of our businesses. Casandra, Hadoop, noSQL, MongoDB and Oracle are also all
present in our stacks.
As such we are looking f... 阅读全帖
e*********g
发帖数: 323
17
Post-Doctoral Fellow on Spintronics in the Department of Electrical and
Electronic Engineering, The University of Hong Kong
Applications are invited for appointment as a Post-Doctoral Fellow (PDF) on
spintronics in the Department of Electrical and Electronic Engineering, from
as soon as possible for initially one year with the possibility of renewal.
Candidates should possess a doctoral degree in Physics, Materials Science,
Electrical Engineering, or a related discipline, with background in
theo... 阅读全帖
c*y
发帖数: 137
18
We are a global equities team in a large hedge fund with offices in both
Stamford and NYC, and we are looking to hire an equity portfolio
optimization intern/consultant to work on our new portfolio optimization
platform. The position is located in midtown NYC; compensation depends on
your level of experiences.
Please submit your resume to : c**[email protected] or apply through the
following URL:
https://careers.sac.com/JobDetail.aspx?id=150
Job Title: Portfolio Optimization Specialist Int... 阅读全帖
s******a
发帖数: 12
19
来自主题: JobMarket版 - Software Engineer – FinTech Startup NYC
About Us: We are an early-stage financial technology startup in NYC. Using a
patent pending approach we are changing the way people manage their money
and make financial decisions. The founders have backgrounds that span large
scale system development, trading and portfolio management, quantitative
finance, and economics. We are extremely well-funded with very positive
initial customer feedback. We are currently in private beta but you can
learn more about us at HYPERLINK "http://www.finaspire.... 阅读全帖
l******h
发帖数: 2
20
Highly reputational company with very competitive compensation for all
positions.
Please send in your resume and position/positions you like to apply to my
email address below.
h*******[email protected]
All resumes will be deliver to hiring manager directly. Act fast!
Thanks!
Silicon Engineering Group
Sr. Physical Design Timing Engineer
Timing (STA) Manager
Senior Physical Design Engineer
CAD Manager - Front-End Design and Verification
Sr. CAD Engineer - Place & Route / Physical Design Engineer
Sr. CA... 阅读全帖
r******a
发帖数: 10
21
我们公司需要两位说中文的销售后勤。。。 如果有朋友感兴趣的, 请发email 给HRUS
@renesola.com 求扩散
responsibilities of this position include but not limit to:
1 Back up for regional EPC and distribution sales manager to close emergency
deals and leads qualifications;
2 Run weekly CRM reports to track status of sales leads, accounts activities
, etc.;
3 Validate PO by region and prepare the required documents for operation
team;
4 Assist to credit setup and follow up the application;
5 Support sales manager to retain customer rel... 阅读全帖
n*m
发帖数: 2
22
【 以下文字转载自 NewYork 讨论区 】
发信人: nwm (新世界商城), 信区: NewYork
标 题: NEW WORLD MALL SECURITY/FIRE SAFETY PERSONELLE OPENINGS (QUEENS, FLUSHING)
发信站: BBS 未名空间站 (Mon Aug 19 13:50:39 2013, 美东)
NEW WORLD MALL SECURITY/FIRE SAFETY PERSONELLE OPENINGS (QUEENS, FLUSHING)
Preferred Qualifications:
• Military Veterans strongly encouraged to apply
• Must have impeccable customer service skills and the ability to be a
proactive problem-solver
• 1 year+ security guard experience preferred
• M... 阅读全帖
l*****t
发帖数: 7
23
来自主题: JobMarket版 - Senior C++ Software Engineer
THIS ROLE WHO ARE BASED IN LOS ANGELES, SAN FRANCISCO, AND SEATTLE.
Primary Responsibilities: • Translate business requirements into
technical designs and project plans • Be an ‘end-to-end owner’ of
software services spanning technology boundaries • Write production-
ready code and unit tests that meet both system and business requirements &#
8226; Support operation of services in production • Respond to feature
requests, bug reports, performance issues and ad-hoc questio... 阅读全帖
z***y
发帖数: 79
24
来自主题: JobMarket版 - [Opening] Team lead @ Boston
Contact me with MITBBS mailbox.
Key skills: lead skills, Python, web development.
------
We are looking for an experienced Technical Lead to lead development.
Reporting to the VP Engineering, the Technical Lead will join a distributed
team to implement large scale multi-tenant B2B services.
Essential Functions and Responsibilities include the following. Other
duties may be assigned:
Succeed in a multi-functional team lead role that includes team management,
software architecture and software ... 阅读全帖
x****g
发帖数: 11
25
The Princeton International School of Mathematics and Science is a
distinctively different, transformative learning opportunity for future
generations of international leaders, innovators, researchers, and problem-
solvers. We provide a rigorous, uniquely challenging education through
innovative learning opportunities and applied, personalized learning
experiences that develop the capable, confident, creative, committed
students who successfully pursue advanced education, achieve their highest
... 阅读全帖
x*******6
发帖数: 994
26
来自主题: JobMarket版 - job opening
Please contact recruiter directly.
#1) One of my longest-standing clients has just received a $31 million
round of Venture Capital funding and is aggressively expanding, hiring
multiple positions for world-class CMOS semiconductor engineers. The
company is a leader in the field of next-generation nonvolatile memory and
is now working with a number of major customers, Their innovative memory has
the potential to replace both flash and DRAM. This is a chance to work on
leading-edge, advanced no... 阅读全帖

发帖数: 1
27
Hiring: Quantitative Developer- Akuna Capital –芝加哥
Akuna Capital is a fast-growing trading house that specializes in derivative
market-making and arbitrage. We pair up experienced and talented traders
with industry-leading low latency IT, giving the company a huge advantage in
the dynamic screen-based trading sphere. Founded in 2011, the company
trades on major derivative markets across the US, our offices are in Chicago
, Shanghai, Champaign and Boston.
Our traders and developers work collabor... 阅读全帖

发帖数: 1
28
来自主题: JobMarket版 - Sourcing Associate--Brooklyn, NY
Job Title: Sourcing Associate
Location: Brooklyn, NY
Category: Supply Chain
About us: Art and Cook is the makers of Art and Cook, the 2004 bestseller
that re-imagined the cookbook as a meditation on life, culture and artistry
rather than a mere manual of recipes. Art and Cook is a marriage: of
function to form, style to quality, innovation to inspiration. Come
celebrates that marriage with us.
Responsibilities:
1: Working closely with our factories that are located in China. Maintain a
harmoniou... 阅读全帖

发帖数: 1
29
国内某知名CRO公司招聘高级研发总监,10年合成以上工作经验,有靶点选择经验,有
国外工作或者学习背景,博士,70-80万+bonus 上海, 联系方式:QQ/微信:
2839988624 [email protected]/* */
Responsibility:
Lead Group Leaders and Bench scientists to execute chemistry projects well,
to build and maintain positive relationship with clients by providing on-
time and high quality delivery and proactive communications.
·Set up the scientific and operational goal and SOP for the projects
assigned; manage and coach Group Leaders and bench scientists; manage
resource... 阅读全帖

发帖数: 1
30
来自主题: JobMarket版 - 诚招宿管中心主任
Position: Guardian Center Director
Full-Time Position: 40 hours Per Week, Schedule: Shift Work 24/7, on Call.
On site housing
Compensation: commensurate with qualifications;.
Location: Southeastern Massachusetts
BostonWise is a company that promotes Sino-US cultural and educational
exchanges. We are looking for a proactive, detail-oriented, problem-solver
as our Guardian Center Director. The director is responsible for the
development, implementation, operation, and assessment of the student lif... 阅读全帖

发帖数: 1
31
About the company:
Phoenix Finance is an online financial services and wealth management
platform established by Phoenix Satellite Television Holdings Limited to
provide intelligent financial services for Chinese investors domestically
and abroad.
Specifically, we partner with numerous industry-leading financial
institutions to gain access to high quality assets, and uses proprietary
financial models and algorithms to analyze data in order to provide users
with a dynamic financial portfolio that... 阅读全帖

发帖数: 1
32
Haitou Capital is a global investment platform, helping institutional
investors and high-net-worth individuals deploy capital across all major
markets, particularly the U.S. and China and different asset classes,
including equities,fixed income,and alternatives such as real estate,
energy, private equity, venture capital and hedge funds. We are a global
firm, with offices in New York City and Beijing.
We are now looking for Investment Analysts to join our New York team.
Exceptional candidates wi... 阅读全帖

发帖数: 1
33
来自主题: JobMarket版 - Private Tour Specialist | San Jose, CA
Founded in the heart of the Silicon Valley USA in 2007, the hiring company
is the market leading online travel agency serving Chinese clients worldwide
. As a fun and energetic travel e-commerce company, they are currently
seeking a responsible and committed individual to join their brand new
Product Marketing Private Tour Team.
Job Opening ID: FH1576
City: San Jose
Job Duration: Permanent
Trial Period:3 month (same salary rate, but no PTO)
Salary: Base: $20.67/hr base, Commission: 1% of the rev... 阅读全帖
u****q
发帖数: 24345
34
【 以下文字转载自 Family 讨论区 】
发信人: TeddyGG (TeddyGG), 信区: Family
标 题: 碰到这样的太太怎么办--持续更新
发信站: BBS 未名空间站 (Sun Mar 30 20:53:25 2014, 美东)
本来应该是1+1,这位太太让我感觉是1-1,请教板里的大大们,碰到这样的太太该怎么
办:
家里的金融投资基本都是我在操心,以前也试过给她一些东西管管,可总是不了了
之,例如有一套投资房,2次换房客一开始都给她试过,到后来都不了了之。第二次更
是因为该不该装修的事情吵起来。我的意思是出租屋要装那么好干嘛,能有收入就可以
,她认为交给contractor装花个1.5w能多点租金。和她试图认真讨论过,主要的con是
租金才多100-200不值得,还有对这种小项目contractor很难伺候。由于和我意见不合
,她找了1个月遇到点挫折就不管了,然后我接手过来,找了一个还比较随和的中产单
身女,收入信用合同都是我一手搞定,后来的日常管理沟通她也基本不过问。不管也就
算了,可这位太太事后也不省心啊....
有一次那个房子里的stove坏... 阅读全帖
V*s
发帖数: 2452
35
去掉也不对,我都用上excel solver了,还是不对。
4/10/2013 4/11/2013 ORIENTAL EXPRESS 5.36
4/11/2013 4/12/2013 A1 6.62
4/11/2013 4/12/2013 A1 4.93
4/11/2013 4/12/2013 JOY YEE NOODLE 22.78
4/13/2013 4/14/2013 EL BARCO RESTAURANT 120
4/12/2013 4/14/2013 A1 4.08
4/12/2013 4/14/2013 A1 7.72
4/15/2013 4/16/2013 A1 6.57
4/15/2013 4/16/2013 A1 7.72
4/17/2013 4/18/2013 POPEYE'S #4186 8.61
4/18/2013 4/19/2013 A1 5.29
4/18/201... 阅读全帖
a*****g
发帖数: 19398
36
来自主题: NextGeneration版 - 人脑赛过电脑的5件事情(zz)
人脑赛过电脑的5件事情(zz)
5 things your brain does better than a computer
http://www.mnn.com/health/fitness-well-being/photos/5-things-yo
Brains are better
For as long as computers have been around, they've been doing things better
than humans. The earliest computing devices were designed to calculate
numbers faster than people, and today's computers can do everything from
calculating pi out to a few billion places to rendering the latest Hollywood
blockbuster onto your screen, complete with Dolby surroun... 阅读全帖
l********e
发帖数: 1220
37
来自主题: Parenting版 - 1岁小娃学游泳?
我家附近有个ISR的trainer,我去看了一下他们的理念,好像不是让小孩子觉得enjoy
的,是为了self-rescue的。一节课10分钟,需要上四个礼拜。这样的好吗?
ISR fundamentally differs from most other swim programs. ISR is not simply a
water acclimation program. Our underlying philosophy is "competence before
confidence". We want our students to have the skills to survive an aquatic
emergency. In other words we want them to become aquatic problem solvers.
The goal of ISR lessons is for a student to perform independently by the end
of lessons.
ISR claims a 94-100% re
f*******3
发帖数: 1371
38
俺也说说。 看这个意思,就是好的教育是培养一个problem solver, 而不是一个百科
辞典。学的时候要带着问题学,以解决问题为目标而不是以记住知识为目标来学。
父母对孩子当然还要有指导,但怎样的指导才能既不压抑孩子的探索又有适当的鼓励和
引导呢,就看孩子的个性和场景了。这方面,只有我想只有通用的理论,没有万能的做
法。只要你注意到了这个问题,理解应该let the children do the thinking,应该不
会有太多问题。比如不能说“good job", 为啥?俺娃能干还不能表扬了啊? 这话也不
见得一定不能说啊,所以与其看他的条条框框,不如先理解他这么建议的原因,再针对
自己孩子的个性找出适合他的方法。
俺是相信孩子都天生有求知欲,有明确表达自己思想和看法的愿望的,那些看起来不够
好奇,或者显得没有opinion的孩子,除了可能因为受了压抑或者自身表达水平不高之
外,多半是父母没有能够抓住孩子的“兴趣点”,没看出来他好奇,他也没有问,就这
样过去了。所以我才觉得跟孩子spend time together doing nothing很重要, 只有在
这样的set
a***r
发帖数: 981
39
来自主题: Parenting版 - 我也开个贴
把前两天的私人blog分享一下,既然涉及到occupational socialization 的问题。
******
昨天老大回家说上课做了一个活动,根据心理测试把学生分组,然后让每组的学生列出
将来想从事的职业,说他们组的三个人选的职业是赚钱最多的。我有点好奇,让她把测
试拿给我看。
心理测试有点像乐嘉的色彩性格分析,让学生把五组行为/性格按照对自己描述地贴切
程度1234排序:
1 a. active; variety; sports b. organized, plan, neat c. nice, helpful,
friends d. learning, sience, privacy
2. a. fun, action, contests b. clean, on time, honest c. caring, people,
feelings d. curious, ideas, questions
3. a. playful, quick, adventurous b. helpful, trustworthy, dependable c.
kind, giving,... 阅读全帖
F*****p
发帖数: 206
40
来自主题: Parenting版 - 说说我对学钢琴的一些观点
钢琴老师们,这电钢琴是有Weight的Key, 想问一下用来练琴比真的钢琴差很多吗?
还有,学钢琴和学打球,从培养Problem Solver角度有不同吗?
还有,钢琴评级越往后越晦涩,简直和孔乙己写茴字的异体字一样,真正对小孩子正确
认识音乐有多大帮助? 古典音乐不过是音乐的一个分支而已。
说到郎朗,他弹得再好,在拍子音调上也不可能超过最普通的电脑Digial Midi合成出
的准确度,就好像心算永远超不过计算器。如果他的才艺能多样化一点,可能他自己也
会绝的充实一点。不咬小看了如今的通俗音乐,没有它,很多小朋友根本对音乐没有任
何兴趣。
作为钢琴老师,不能一味强调钢琴万能,否则,最大的失败就是朗朗,高级打字员。码
工至少可以比他还Creative一点。
a*****g
发帖数: 19398
41
来自主题: Parenting版 - 人脑赛过电脑的5件事情(zz)
人脑赛过电脑的5件事情(zz)
5 things your brain does better than a computer
http://www.mnn.com/health/fitness-well-being/photos/5-things-yo
Brains are better
For as long as computers have been around, they've been doing things better
than humans. The earliest computing devices were designed to calculate
numbers faster than people, and today's computers can do everything from
calculating pi out to a few billion places to rendering the latest Hollywood
blockbuster onto your screen, complete with Dolby surroun... 阅读全帖
W******e
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42
1. Introduction
My interest in studying creativity was inspired by the frustrations that I
felt as a student, then as a professor. I wanted to know how I could
encourage creativity in myself, my students, and my colleagues.
Politicians, industrial managers, academic administrators, and other leaders
often say that innovation is critical to the future of civilization, our
country, their company, etc. But in practice, these same people often act as
if innovation is an evil that must be suppressed,... 阅读全帖
X****r
发帖数: 3557
43
来自主题: Parenting版 - 我来说说learning approach
然后good presenter做领导,good problem solver干活…

excellent
problem,
.
t*******r
发帖数: 22634
44
来自主题: Parenting版 - 关于gifted program的小疑问
好吧,那是你们数学家的事。
俺们马工更关心收敛速度,conjugated gradient solver 啥的,反正老板不会让程序
跑无穷多时间。
另外记得 IEEE floating point standard 的 Inf 和 NaN 好像是符合分配率的。。。
t*******r
发帖数: 22634
45
来自主题: Parenting版 - 关于gifted program的小疑问
另外这个两整数的竖式除法,得出一个无限循环小数,该无限循环小数的收敛性,跟实
数连续性公理,有个毛关系嘛。。。这个 solver,每个 iteration 的结果都是一个有
理数,结果逼近的也是一个有理数。无理数都没吱个声。实数连续性公理,没无理数也
没法连续吧。
t*******r
发帖数: 22634
46
来自主题: Parenting版 - 关于gifted program的小疑问
另外回马放一枪,对于下面两个表达式:
1 - 1 + 1 - 1 + 1 ...
vs
(1 - 1) + (1 - 1) + (1 - 1) + (1 - 1) ...
上面那两无限表达式,根本就是在 modelling 两个完全不同
的 iterative solver 嘛。这这这,不是明摆着 iteration
的定义完全不同嘛。(或者从 cosmology 的角度,cosmological
time tick 完全不一样嘛。)。。。就是从形式主义角度看,
两不同的表达式,得出完全不同的结果,这能有啥问题?。。。
两个不同的表达式,得出的两个结果不一样。。。我不知道这么
直白的东东,是不是还需要去请示一下俺家四岁小娃?
当然,有人又要提欧拉。。。俺已经说了一万遍了,欧拉这哥们
会写 Java 么?这哥们会写 Perl 么?。。。那您能指望个啥?
。。。至于现代人也这么整的话,我只能颤颤巍巍哆哆嗦嗦地小声
问一句:“这数学。。。是体育老师教的么?”。。。
// 哈哈,run 了。。。不许追杀!!!!!!
t*******r
发帖数: 22634
47
来自主题: Parenting版 - 关于gifted program的小疑问
差不多是这个意思。。。俺们还是用一个简单的数,不要用我昨晚在
后院随手敲的 12345/99999 了。。。我们用 1/9 吧。。。
0.111111111 ....
凑个 9,竖式除法算 1/9,从 iterative solver 的角度看:
we know final x = 1/9
s1: 0.1 < x < 0.2
s2: 0.11 < x < 0.12
s3: 0.111 < x < 0.112
s4: 0.1111 < x < 0.1112
...
上面这么看起来不清楚的话,干脆完全给整数化,
这么改写:
s1: 9/90 < x < 18/90
s2: 99/900 < x < 108/90
s3: 999/9000 < x < 1008/9000
s4: 9999/90000 < x < 10008/90000
...
而 1/9,也就是:
10/90
100/9000
1000/9000
10000/90000
...
t*******r
发帖数: 22634
48
来自主题: Parenting版 - 一头猪只能有一个脑袋
我擦。。。Newton Solver 也才两阶导数。。。三阶的是天顶星人的干活。。。
t*******r
发帖数: 22634
49
来自主题: Parenting版 - 真的应该为孩子牺牲10几年吗?
谁付我小时数工资?。。。没人付我小时数工资的话,我看我有没有兴趣改进了。。。
否则我不如把小时数投资去学 3SAT solver 理论啥的。。。
t*******r
发帖数: 22634
50
来自主题: Parenting版 - 真的应该为孩子牺牲10几年吗?
代数包括微积分就完备了,基于泰勒展开的牛顿迭代方程求解算法(Iterative
Newton Solver),有多少时间就能精确到多少位,多少次方程都没关系。。。
代数奥数题确实不简单,但代数奥数题,上微积分的道,更容易吧。。。
也就是足球守门员值不值得猛练乒乓球的问题。。。当然,从某一个角度而言,
都是要碰到球。。。
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