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数据挖掘_Standard & Poor's Home Price Index (1991-2009)(标准普尔房价指数(1991-2009))

Standard & Poor's Home Price Index (1991-2009)(标准普尔房价指数(1991-2009))数据摘要：The S&P/Case-Shiller Home Price Index measures the residential housing market, tracking changes in the value of the residential real estate market in about 20 metropolitan regions across the United States. These indices use the repeat sales pricing technique to measure housing markets. First developed by Karl Case and Robert Shiller, this methodology collects data on single-family home re-sales, capturing re-sold sale prices to form sale pairs. This index family consists of 20 regional indices and two composite indices as aggregates of the regions.中文关键词：数据挖掘,美国,标准,普尔房价指数,1991-2009,SOCR,英文关键词：Data mining,USA,Standard,Poor Home PriceIndex,1991-2009,SOCR,数据格式：TEXT数据用途：The data can be used for data mining and analysis.数据详细介绍：Standard & Poor's Home Price Index(1991-2009)∙AbstractThe S&P/Case-Shiller Home Price Index measures the residential housing market, tracking changes in the value of the residential real estate market in about 20 metropolitan regions across the United States.These indices use the repeat sales pricing technique to measure housing markets. First developed by Karl Case and Robert Shiller, this methodology collects data on single-family home re-sales, capturing re-sold sale prices to form sale pairs. This index family consists of 20 regional indices and two composite indices as aggregates of the regions.∙Data DescriptionThe S&P/Case-Shiller Home Price Indices are calculated monthly and published with a two month lag. New index levels are released at 9am Eastern Standard Time on the last Tuesday of every month.In addition, the S&P/Case-Shiller U.S. National Home Price Index is a broader composite of single-family home price indices for the nine U.S.Census divisions and is calculated quarterly.Note: The S&P/Case Shiller Indices are calculated by Fiserv, Inc. In addition, Fiserv also offers indices covering thousands of zip codes and metro areas using the Case-Shiller methodology. For more informationregarding Fiserv’s products, please call Fiserv Customer Support at 877-279-2272.This index is maintained by an Index Committee, whose members include Standard & Poor's, Fiserv and leading industry experts. It follows a set of published guidelines and policies that provide the transparent methodologies used to maintain the index.Definitions: Columns and rows in this table include:Metropolitan Areas: AZ-Phoenix, CA-LosAngeles, CA-SanDiego, CA-SanFrancisco, CO-Denver, DC-Washington, FL-Miami, FL-Tampa, GA-Atlanta, IL-Chicago, MA-Boston, MI-Detroit, MN-Minneapolis, NC-Charlotte, NV-LasVegas, NY-NewYork, OH-Cleveland, OR-Portland, WA-Seattle.Years: 1991-2009 (monthly)Reference数据预览：点此下载完整数据集。

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国外摄影网站网址大全

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英语作文大家庭

In the context of a large family,the dynamics are quite unique and full of life.Heres an insight into what living in a big family might look like through an English composition.Title:The Warmth of a Big FamilyLiving in a big family is like being part of a bustling,everevolving community.Theres a constant hum of activity,laughter,and chatter that fills the air,creating a symphony of life that is both comforting and invigorating.The Structure of the Family:A large family typically consists of multiple generations living under one roof. Grandparents,parents,children,and even cousins often reside together,forming a closeknit unit.This multigenerational setup fosters a deep sense of respect and understanding for different perspectives and experiences.Daily Life:Daily life in a big family is a blend of routine and spontaneity.Mornings are a rush of activity as everyone prepares for the day ahead.The aroma of breakfast wafts through the house,a signal for everyone to gather around the table.Conversations flow freely,and the clatter of dishes creates a rhythm that sets the tone for the day.Education and Learning:In a large family,education is not confined to the classroom.Children learn from their elders,absorbing life lessons and wisdom that is passed down through generations. Storytelling sessions are a treasure trove of knowledge,where history,culture,and values are shared and preserved.Celebrations and Traditions:Festivals and celebrations are grand affairs in a big family.Each event is an opportunity to come together,share food,and partake in rituals that strengthen familial bonds.The preparation for these occasions is a collective effort,with everyone contributing in their own way,whether its cooking,decorating,or organizing events.Challenges and Solutions:Living in a large family also presents its set of challenges.Space can be a luxury,and conflicts may arise due to differing opinions or needs.However,these are often resolved through open communication and a mutual understanding of the importance of harmony within the family unit.The Importance of Togetherness:The essence of a big family lies in its togetherness.Despite the diversity in age,interests, and personalities,there is a common thread of love and support that binds everyone.This sense of unity is what makes a large family not just a home,but a sanctuary where everyone feels valued and heard.Conclusion:A big family is a microcosm of society,reflecting the complexities and the beauty of human relationships.It is a place where one learns the art of compromise,the value of diversity,and the strength that comes from collective support.While it may not be for everyone,for those who are part of such a family,it is a source of endless joy,learning, and growth.。

美国经济指标解读

美国经济指标解读1、国内生产总值（Gross Domestic Product，GDP）★★★★★2、制造业指数（Institute for Supply Management, ISM）★★★3、采购经理人指数（Purchase Management Index，PMI）★★★4、工业生产指数（Industrial Production）★★★5、设备使用率、产能利用率（Capacity Utilization）★★★6、消费者物价指数（Consumer Price Index，CPI）★★★★7、生产者物价指数（Producer Price Index，PPI）★★★★8、就业报告（Employment Report）★★★★★9、领先指针（Leading Indicators）★★★★10、新屋开工数及营建许可数（Housing Starts and Building Permits）★★★11、新屋销售量（New HomeSales）★★12、成屋销售量（Existing Home Sales）★13、零售销售指数（Retail Sales Index）★★★★★14、耐用消费品订单（Durable Domestic Product）★★★15、经常帐（Current Account，CA）★16、预算赤字、政府赤字（Budget Deficit）★★★17、贸易赤字（TradeDeficit）★★18、个人收入与支出（Personal Income and Consumption）★19、消费者信心指数（Consumer Confidence Index）★★★20、工厂订单（FactoryOrders）★★★★21、商业库存（Business Inventories）★★★22、消费信贷（Consumer Credit）★★23、初请失业金人数（Initial Jobless Claims）★★★24、生产力与单位劳动成本★★★★★（Productivity and Unit Labor Cost）25、批发库存（Wholesale Inventories）★★1、国内生产总值（Gross Domestic Product，GDP）定义：用以衡量全国国内财货与服务产值的经济活动总金额。

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Tornado简介

Tornado简介简介Tornado全称Tornado Web Server，是⼀个⽤Python语⾔写成的Web服务器兼Web应⽤框架，由FriendFeed公司在⾃⼰的⽹站FriendFeed 中使⽤，被Facebook收购以后框架在2009年9⽉以开源软件形式开放给⼤众。

Tornado与其他Web框架的区别以Django为代表的python web应⽤部署时采⽤wsgi协议与服务器对接（被服务器托管），⽽这类服务器通常都是基于多线程的，也就是说每⼀个⽹络请求服务器都会有⼀个对应的线程来⽤web应⽤（如Django）进⾏处理。

考虑两类应⽤场景1. ⽤户量⼤，⾼并发如秒杀抢购、双⼗⼀某宝购物、春节抢⽕车票2. ⼤量的HTTP持久连接使⽤同⼀个TCP连接来发送和接收多个HTTP请求/应答，⽽不是为每⼀个新的请求/应答打开新的连接的⽅法。

对于HTTP 1.0，可以在请求的包头（Header）中添加Connection: Keep-Alive。

对于HTTP 1.1，所有的连接默认都是持久连接。

对于这两种场景，通常基于多线程的服务器很难应对。

对于前⾯提出的这种⾼并发问题，我们通常⽤C10K这⼀概念来描述。

C10K—— Concurrently handling ten thousandconnections，即并发10000个连接。

对于单台服务器⽽⾔，根本⽆法承担，⽽采⽤多台服务器分布式⼜意味着⾼昂的成本。

如何解决C10K问题？Tornado在设计之初就考虑到了性能因素，旨在解决C10K问题，这样的设计使得其成为⼀个拥有⾮常⾼性能的解决⽅案（服务器与框架的集合体）。

Hello Word第⼀个py安装Tornado部分略过，我们直接进⼊正题，PyCharm没有新建Tornado项⽬的选项，我们直接新建⼀个py即可。

1 # -*- coding=utf-8 -*-2 import tornado.web3 import tornado.ioloop456 class Index(tornado.web.RequestHandler):7 # 封装⼀个类8 def get(self):9 # get请求进⼊该⽅法10 # 返回字符串11 self.write('Hello World')121314 class Home(tornado.web.RequestHandler):15 def get(self):16 self.write('Home')171819 if __name__ == '__main__':20 app = tornado.web.Application([21 # 相当于路由22 (r'/', Index),23 (r'/home', Home),24 ])25 # 指定端⼝26 app.listen(8000)27 # 开启28 tornado.ioloop.IOLoop.current().start()我们直接启动即可，然后使⽤postman或者浏览器访问（我习惯使⽤postman）http://localhost:8000我们测试⼀下结果当服务器收到请求时会进⼊Application，进⼊路由顺序查找匹配。

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