Predictive Analysis for Airbnb Listing Rating using Scalable Big Data Platform

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KMIS International Conference 2021. This talk aims to provide insights and performance of predictive models for Airbnb Rating using Big Data and distributed parallel computing systems. We have predicted and classified using Two-Class Classification models if a property has a high or a low rating based on the features of the listing. It helps the hosts to know if their property is suitable and how their listing compares to other similar listings. We compare the results and the performance of rating prediction models with accuracy and computing time metrics.

Data & Analytics

Jongwook Woo
BigDAI
CalStateLA
KMIS - Fall 2021
November 12, 2021
Savita Yadav, syadav5@calstatela.edu
Samyuktha Muralidharan, Jongwook Woo
Big Data AI Center (BigDAI)
California State University, Los Angeles
Predictive Analysis
for Airbnb Listing Rating
using Scalable Big Data Platform

Big Data Artificial Intelligence Center (BigDAI)
Jongwook Woo
CalStateLA
Contents
 Why we need to predict Airbnb Listing Rating
Dataset Details
 Hardware Specifications
 Machine Learning algorithms used
Flowchart of the project
Comparison of results of Spark ML algorithms

Big Data Artificial Intelligence Center (BigDAI)
Jongwook Woo
CalStateLA
Need for Predicting Airbnb Listing Rating
The objective is to build a model that classifies a property as highly
rated or low rated based on the features of the listing.
Helps Airbnb hosts to make simple changes to the properties they
are listing in order to boost customer satisfaction and attract
potential bookings.
It can serve as a baseline to understand the factors that contribute
to the popularity and rating of a listing.

Big Data Artificial Intelligence Center (BigDAI)
Jongwook Woo
CalStateLA
Dataset Details
 Dataset: Airbnb Listings
 Total Dataset size: 4 GB, 400 MB
 Dataset Format: CSV
 Dataset URLs:
https://public.opendatasoft.com/explore/dataset/airbnb-
listings/table/?disjunctive.host_verifications&disjunctive.amenities&disjun
ctive.features

Big Data Artificial Intelligence Center (BigDAI)
Jongwook Woo
CalStateLA
Technical Specifications
Spark: Databricks Subscription
Databricks Runtime version: DBR 8.2
ML (Apache Spark 3.1.1, GPU, Scala
2.12)
Instance: g4dn.xlarge
Memory: 64.0 GB
Nodes: 4
CPU Cores: 16
File System: DBFS (Data Bricks File
System)
Python Version 3.8.6

Big Data Artificial Intelligence Center (BigDAI)
Jongwook Woo
CalStateLA
Machine Learning Algorithms Used
Rating Prediction
Spark ML:
–Decision Tree Classifier
–Random Forest Classifier
–Gradient Boosted Tree Classifier
–Logistic Regression
–Support Vector Machine

Big Data Artificial Intelligence Center (BigDAI)
Jongwook Woo
CalStateLA

Big Data Artificial Intelligence Center (BigDAI)
Jongwook Woo
CalStateLA
Airbnb Rating Prediction
Predicting whether the listing has a good rating or not.
Converting the Review Scores Rating column to categorical
Review Scores Rating >= 80 -> High Rating
Review Scores Rating < 80 -> Low Rating
Using two-class classification algorithms to build a model to
classify the listings as high rated and low rated, based on the
features of the listing.

Big Data Artificial Intelligence Center (BigDAI)
Jongwook Woo
CalStateLA
Rating Prediction Measurement with Big
Data cluster on AWS
Accuracy
 We intend to reduce the number of False Positives to gain a higher
Precision value.
The AUC values are another significant factor to determine the accuracy.
Computing Time:
To train models.

Big Data Artificial Intelligence Center (BigDAI)
Jongwook Woo
CalStateLA
Decision Tree
o File Size: 400 MB
o Split Train/Test: 70:30
o Time Taken to run : 1.15
minutes
o AUC : 0.972
o Precision: 0.983
o Recall: 0.984

Big Data Artificial Intelligence Center (BigDAI)
Jongwook Woo
CalStateLA
Random Forest
o File Size: 400 MB
o Split Train/Test: 70:30
o Time Taken to run : 2.13
minutes
o AUC : 0.979
o Precision: 0.985
o Recall: 0.993

Big Data Artificial Intelligence Center (BigDAI)
Jongwook Woo
CalStateLA
Gradient Boosted Tree
o File Size: 400 MB
o Split Train/Test: 70:30
o Time Taken to run : 2.35
minutes
o AUC : 0.977
o Precision: 0.984
o Recall: 0.993

Big Data Artificial Intelligence Center (BigDAI)
Jongwook Woo
CalStateLA
Logistic Regression
o File Size: 400 MB
o Split Train/Test: 70:30
o Time Taken to run : 1.47
minutes
o AUC : 0.959
o Precision: 0.968
o Recall: 0.998

Big Data Artificial Intelligence Center (BigDAI)
Jongwook Woo
CalStateLA
Support Vector Machine
o File Size: 400 MB
o Split Train/Test: 70:30
o Time Taken to run : 4.49
minutes
o AUC : 0.958
o Precision: 0.966
o Recall: 0.998

Big Data Artificial Intelligence Center (BigDAI)
Jongwook Woo
CalStateLA
Comparison of results of Spark ML Algorithms
Models Computing
Time
Precision Recall AUC
Decision Tree 1.15 mins 0.983 0.984 0.972
Random Forest 2.13 mins 0.985 0.993 0.979
GBT Classifier 2.35 mins 0.984 0.993 0.977
Logistic
Regression
1.47 mins 0.968 0.998 0.959
SVM 4.49 mins 0.966 0.998 0.958

Big Data Artificial Intelligence Center (BigDAI)
Jongwook Woo
CalStateLA
Conclusion
 The metric computing time in the Decision Tree is the most
efficient, with 1.15 minutes.
 RF (and GBT) models have performed well to classify listings
in the United States.
RF model is the optimal
Accuracy is more important

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Enhanced Enterprise Intelligence with your personal AI Data Copilot.pdf

GetInData

Recently we have observed the rise of open-source Large Language Models (LLMs) that are community-driven or developed by the AI market leaders, such as Meta (Llama3), Databricks (DBRX) and Snowflake (Arctic). On the other hand, there is a growth in interest in specialized, carefully fine-tuned yet relatively small models that can efficiently assist programmers in day-to-day tasks. Finally, Retrieval-Augmented Generation (RAG) architectures have gained a lot of traction as the preferred approach for LLMs context and prompt augmentation for building conversational SQL data copilots, code copilots and chatbots. In this presentation, we will show how we built upon these three concepts a robust Data Copilot that can help to democratize access to company data assets and boost performance of everyone working with data platforms. Why do we need yet another (open-source ) Copilot? How can we build one? Architecture and evaluation

一比一原版(UniSA毕业证书)南澳大学毕业证如何办理

slg6lamcq

原版定制【微信:41543339】【(UniSA毕业证书)南澳大学毕业证】【微信:41543339】成绩单、外壳、offer、留信学历认证（永久存档真实可查）采用学校原版纸张、特殊工艺完全按照原版一比一制作（包括：隐形水印，阴影底纹，钢印LOGO烫金烫银，LOGO烫金烫银复合重叠，文字图案浮雕，激光镭射，紫外荧光，温感，复印防伪）行业标杆！精益求精，诚心合作，真诚制作！多年品质 ,按需精细制作，24小时接单,全套进口原装设备，十五年致力于帮助留学生解决难题，业务范围有加拿大、英国、澳洲、韩国、美国、新加坡，新西兰等学历材料，包您满意。【我们承诺采用的是学校原版纸张（纸质、底色、纹路），我们拥有全套进口原装设备，特殊工艺都是采用不同机器制作，仿真度基本可以达到100%，所有工艺效果都可提前给客户展示，不满意可以根据客户要求进行调整，直到满意为止！】【业务选择办理准则】一、工作未确定，回国需先给父母、亲戚朋友看下文凭的情况，办理一份就读学校的毕业证【微信41543339】文凭即可二、回国进私企、外企、自己做生意的情况，这些单位是不查询毕业证真伪的，而且国内没有渠道去查询国外文凭的真假，也不需要提供真实教育部认证。鉴于此，办理一份毕业证【微信41543339】即可三、进国企，银行，事业单位，考公务员等等，这些单位是必需要提供真实教育部认证的，办理教育部认证所需资料众多且烦琐，所有材料您都必须提供原件，我们凭借丰富的经验，快捷的绿色通道帮您快速整合材料，让您少走弯路。留信网认证的作用: 1:该专业认证可证明留学生真实身份 2:同时对留学生所学专业登记给予评定 3:国家专业人才认证中心颁发入库证书 4:这个认证书并且可以归档倒地方 5:凡事获得留信网入网的信息将会逐步更新到个人身份内，将在公安局网内查询个人身份证信息后，同步读取人才网入库信息 6:个人职称评审加20分 7:个人信誉贷款加10分 8:在国家人才网主办的国家网络招聘大会中纳入资料，供国家高端企业选择人才留信网服务项目： 1、留学生专业人才库服务（留信分析） 2、国（境）学习人员提供就业推荐信服务 3、留学人员区块链存储服务 → 【关于价格问题（保证一手价格）】我们所定的价格是非常合理的，而且我们现在做得单子大多数都是代理和回头客户介绍的所以一般现在有新的单子我给客户的都是第一手的代理价格，因为我想坦诚对待大家不想跟大家在价格方面浪费时间对于老客户或者被老客户介绍过来的朋友，我们都会适当给一些优惠。选择实体注册公司办理，更放心，更安全！我们的承诺：客户在留信官方认证查询网站查询到认证通过结果后付款，不成功不收费！

Influence of Marketing Strategy and Market Competition on Business Plan

jerlynmaetalle

一比一原版(GWU,GW文凭证书)乔治·华盛顿大学毕业证如何办理

bopyb

毕业原版【微信:176555708】【(GWU,GW毕业证书)乔治·华盛顿大学毕业证】【微信:176555708】成绩单、外壳、offer、留信学历认证（永久存档真实可查）采用学校原版纸张、特殊工艺完全按照原版一比一制作（包括：隐形水印，阴影底纹，钢印LOGO烫金烫银，LOGO烫金烫银复合重叠，文字图案浮雕，激光镭射，紫外荧光，温感，复印防伪）行业标杆！精益求精，诚心合作，真诚制作！多年品质 ,按需精细制作，24小时接单,全套进口原装设备，十五年致力于帮助留学生解决难题，业务范围有加拿大、英国、澳洲、韩国、美国、新加坡，新西兰等学历材料，包您满意。【我们承诺采用的是学校原版纸张（纸质、底色、纹路），我们拥有全套进口原装设备，特殊工艺都是采用不同机器制作，仿真度基本可以达到100%，所有工艺效果都可提前给客户展示，不满意可以根据客户要求进行调整，直到满意为止！】【业务选择办理准则】一、工作未确定，回国需先给父母、亲戚朋友看下文凭的情况，办理一份就读学校的毕业证【微信176555708】文凭即可二、回国进私企、外企、自己做生意的情况，这些单位是不查询毕业证真伪的，而且国内没有渠道去查询国外文凭的真假，也不需要提供真实教育部认证。鉴于此，办理一份毕业证【微信176555708】即可三、进国企，银行，事业单位，考公务员等等，这些单位是必需要提供真实教育部认证的，办理教育部认证所需资料众多且烦琐，所有材料您都必须提供原件，我们凭借丰富的经验，快捷的绿色通道帮您快速整合材料，让您少走弯路。留信网认证的作用: 1:该专业认证可证明留学生真实身份 2:同时对留学生所学专业登记给予评定 3:国家专业人才认证中心颁发入库证书 4:这个认证书并且可以归档倒地方 5:凡事获得留信网入网的信息将会逐步更新到个人身份内，将在公安局网内查询个人身份证信息后，同步读取人才网入库信息 6:个人职称评审加20分 7:个人信誉贷款加10分 8:在国家人才网主办的国家网络招聘大会中纳入资料，供国家高端企业选择人才留信网服务项目： 1、留学生专业人才库服务（留信分析） 2、国（境）学习人员提供就业推荐信服务 3、留学人员区块链存储服务 → 【关于价格问题（保证一手价格）】我们所定的价格是非常合理的，而且我们现在做得单子大多数都是代理和回头客户介绍的所以一般现在有新的单子我给客户的都是第一手的代理价格，因为我想坦诚对待大家不想跟大家在价格方面浪费时间对于老客户或者被老客户介绍过来的朋友，我们都会适当给一些优惠。选择实体注册公司办理，更放心，更安全！我们的承诺：客户在留信官方认证查询网站查询到认证通过结果后付款，不成功不收费！

Global Situational Awareness of A.I. and where its headed

vikram sood

You can see the future first in San Francisco. Over the past year, the talk of the town has shifted from $10 billion compute clusters to $100 billion clusters to trillion-dollar clusters. Every six months another zero is added to the boardroom plans. Behind the scenes, there’s a fierce scramble to secure every power contract still available for the rest of the decade, every voltage transformer that can possibly be procured. American big business is gearing up to pour trillions of dollars into a long-unseen mobilization of American industrial might. By the end of the decade, American electricity production will have grown tens of percent; from the shale fields of Pennsylvania to the solar farms of Nevada, hundreds of millions of GPUs will hum. The AGI race has begun. We are building machines that can think and reason. By 2025/26, these machines will outpace college graduates. By the end of the decade, they will be smarter than you or I; we will have superintelligence, in the true sense of the word. Along the way, national security forces not seen in half a century will be un-leashed, and before long, The Project will be on. If we’re lucky, we’ll be in an all-out race with the CCP; if we’re unlucky, an all-out war. Everyone is now talking about AI, but few have the faintest glimmer of what is about to hit them. Nvidia analysts still think 2024 might be close to the peak. Mainstream pundits are stuck on the wilful blindness of “it’s just predicting the next word”. They see only hype and business-as-usual; at most they entertain another internet-scale technological change. Before long, the world will wake up. But right now, there are perhaps a few hundred people, most of them in San Francisco and the AI labs, that have situational awareness. Through whatever peculiar forces of fate, I have found myself amongst them. A few years ago, these people were derided as crazy—but they trusted the trendlines, which allowed them to correctly predict the AI advances of the past few years. Whether these people are also right about the next few years remains to be seen. But these are very smart people—the smartest people I have ever met—and they are the ones building this technology. Perhaps they will be an odd footnote in history, or perhaps they will go down in history like Szilard and Oppenheimer and Teller. If they are seeing the future even close to correctly, we are in for a wild ride. Let me tell you what we see.

一比一原版(CBU毕业证)卡普顿大学毕业证如何办理

ahzuo

CBU毕业证offer【微信95270640】《卡普顿大学毕业证书》《QQ微信95270640》学位证书电子版：在线制作卡普顿大学毕业证成绩单GPA修改（制作CBU毕业证成绩单CBU文凭证书样本）、卡普顿大学毕业证书与成绩单样本图片、《CBU学历证书学位证书》、卡普顿大学毕业证案例毕业证书制作軟體、在线制作加拿大硕士学历证书真实可查. 如果您是以下情况，我们都能竭诚为您解决实际问题：【公司采用定金+余款的付款流程，以最大化保障您的利益，让您放心无忧】 1、在校期间，因各种原因未能顺利毕业，拿不到官方毕业证+微信95270640 2、面对父母的压力，希望尽快拿到卡普顿大学卡普顿大学毕业证成绩单； 3、不清楚流程以及材料该如何准备卡普顿大学卡普顿大学毕业证成绩单； 4、回国时间很长，忘记办理； 5、回国马上就要找工作，办给用人单位看； 6、企事业单位必须要求办理的；面向美国乔治城大学毕业留学生提供以下服务: 【★卡普顿大学卡普顿大学毕业证成绩单毕业证、成绩单等全套材料，从防伪到印刷，从水印到钢印烫金，与学校100%相同】【★真实使馆认证（留学人员回国证明），使馆存档可通过大使馆查询确认】【★真实教育部认证，教育部存档，教育部留服网站可查】【★真实留信认证，留信网入库存档，可查卡普顿大学卡普顿大学毕业证成绩单】我们从事工作十余年的有着丰富经验的业务顾问，熟悉海外各国大学的学制及教育体系，并且以挂科生解决毕业材料不全问题为基础，为客户量身定制1对1方案，未能毕业的回国留学生成功搭建回国顺利发展所需的桥梁。我们一直努力以高品质的教育为起点，以诚信、专业、高效、创新作为一切的行动宗旨，始终把“诚信为主、质量为本、客户第一”作为我们全部工作的出发点和归宿点。同时为海内外留学生提供大学毕业证购买、补办成绩单及各类分数修改等服务；归国认证方面，提供《留信网入库》申请、《国外学历学位认证》申请以及真实学籍办理等服务，帮助众多莘莘学子实现了一个又一个梦想。专业服务，请勿犹豫联系我如果您真实毕业回国，对于学历认证无从下手，请联系我，我们免费帮您递交诚招代理：本公司诚聘当地代理人员，如果你有业余时间，或者你有同学朋友需要，有兴趣就请联系我你赢我赢，共创双赢你做代理，可以帮助卡普顿大学同学朋友你做代理，可以拯救卡普顿大学失足青年你做代理，可以挽救卡普顿大学一个个人才你做代理，你将是别人人生卡普顿大学的转折点你做代理，可以改变自己，改变他人，给他人和自己一个机会道银边山娃摸索着扯了扯灯绳小屋顿时一片刺眼的亮瞅瞅床头的诺基亚山娃苦笑着摇了摇头连他自己都感到奇怪居然又睡到上午点半掐指算算随父亲进城已一个多星期了山娃几乎天天起得这么迟在乡下老家暑假五点多山娃就醒来在爷爷奶奶嘁嘁喳喳的忙碌声中一骨碌爬起把牛驱到后龙山再从莲塘里采回一蛇皮袋湿漉漉的莲蓬也才点多点半早就吃过早餐玩耍去了山娃的家在闽西山区依山傍水山清水秀门前潺潺流淌的蜿蜒小溪一直都是山娃和小伙伴们盛试

The affect of service quality and online reviews on customer loyalty in the E...

jerlynmaetalle

一比一原版(Bradford毕业证书)布拉德福德大学毕业证如何办理

mbawufebxi

原版定制【微信:41543339】【(Bradford毕业证书)布拉德福德大学毕业证】【微信:41543339】成绩单、外壳、offer、留信学历认证（永久存档真实可查）采用学校原版纸张、特殊工艺完全按照原版一比一制作（包括：隐形水印，阴影底纹，钢印LOGO烫金烫银，LOGO烫金烫银复合重叠，文字图案浮雕，激光镭射，紫外荧光，温感，复印防伪）行业标杆！精益求精，诚心合作，真诚制作！多年品质 ,按需精细制作，24小时接单,全套进口原装设备，十五年致力于帮助留学生解决难题，业务范围有加拿大、英国、澳洲、韩国、美国、新加坡，新西兰等学历材料，包您满意。【我们承诺采用的是学校原版纸张（纸质、底色、纹路），我们拥有全套进口原装设备，特殊工艺都是采用不同机器制作，仿真度基本可以达到100%，所有工艺效果都可提前给客户展示，不满意可以根据客户要求进行调整，直到满意为止！】【业务选择办理准则】一、工作未确定，回国需先给父母、亲戚朋友看下文凭的情况，办理一份就读学校的毕业证【微信41543339】文凭即可二、回国进私企、外企、自己做生意的情况，这些单位是不查询毕业证真伪的，而且国内没有渠道去查询国外文凭的真假，也不需要提供真实教育部认证。鉴于此，办理一份毕业证【微信41543339】即可三、进国企，银行，事业单位，考公务员等等，这些单位是必需要提供真实教育部认证的，办理教育部认证所需资料众多且烦琐，所有材料您都必须提供原件，我们凭借丰富的经验，快捷的绿色通道帮您快速整合材料，让您少走弯路。留信网认证的作用: 1:该专业认证可证明留学生真实身份 2:同时对留学生所学专业登记给予评定 3:国家专业人才认证中心颁发入库证书 4:这个认证书并且可以归档倒地方 5:凡事获得留信网入网的信息将会逐步更新到个人身份内，将在公安局网内查询个人身份证信息后，同步读取人才网入库信息 6:个人职称评审加20分 7:个人信誉贷款加10分 8:在国家人才网主办的国家网络招聘大会中纳入资料，供国家高端企业选择人才留信网服务项目： 1、留学生专业人才库服务（留信分析） 2、国（境）学习人员提供就业推荐信服务 3、留学人员区块链存储服务 → 【关于价格问题（保证一手价格）】我们所定的价格是非常合理的，而且我们现在做得单子大多数都是代理和回头客户介绍的所以一般现在有新的单子我给客户的都是第一手的代理价格，因为我想坦诚对待大家不想跟大家在价格方面浪费时间对于老客户或者被老客户介绍过来的朋友，我们都会适当给一些优惠。选择实体注册公司办理，更放心，更安全！我们的承诺：客户在留信官方认证查询网站查询到认证通过结果后付款，不成功不收费！

4th Modern Marketing Reckoner by MMA Global India & Group M: 60+ experts on W...

Social Samosa

University of New South Wales degree offer diploma Transcript

soxrziqu

Intelligence supported media monitoring in veterinary medicine

AndrzejJarynowski

一比一原版(UCSF文凭证书)旧金山分校毕业证如何办理

nuttdpt

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Timothy Spann

06-04-2024 - NYC Tech Week - Discussion on Vector Databases, Unstructured Data and AI Discussion on Vector Databases, Unstructured Data and AI https://www.meetup.com/unstructured-data-meetup-new-york/ This meetup is for people working in unstructured data. Speakers will come present about related topics such as vector databases, LLMs, and managing data at scale. The intended audience of this group includes roles like machine learning engineers, data scientists, data engineers, software engineers, and PMs.This meetup was formerly Milvus Meetup, and is sponsored by Zilliz maintainers of Milvus.

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g4dpvqap0

毕业原版【微信:41543339】【(Glasgow毕业证书)格拉斯哥大学毕业证】【微信:41543339】成绩单、外壳、offer、留信学历认证（永久存档真实可查）采用学校原版纸张、特殊工艺完全按照原版一比一制作（包括：隐形水印，阴影底纹，钢印LOGO烫金烫银，LOGO烫金烫银复合重叠，文字图案浮雕，激光镭射，紫外荧光，温感，复印防伪）行业标杆！精益求精，诚心合作，真诚制作！多年品质 ,按需精细制作，24小时接单,全套进口原装设备，十五年致力于帮助留学生解决难题，业务范围有加拿大、英国、澳洲、韩国、美国、新加坡，新西兰等学历材料，包您满意。【我们承诺采用的是学校原版纸张（纸质、底色、纹路），我们拥有全套进口原装设备，特殊工艺都是采用不同机器制作，仿真度基本可以达到100%，所有工艺效果都可提前给客户展示，不满意可以根据客户要求进行调整，直到满意为止！】【业务选择办理准则】一、工作未确定，回国需先给父母、亲戚朋友看下文凭的情况，办理一份就读学校的毕业证【微信41543339】文凭即可二、回国进私企、外企、自己做生意的情况，这些单位是不查询毕业证真伪的，而且国内没有渠道去查询国外文凭的真假，也不需要提供真实教育部认证。鉴于此，办理一份毕业证【微信41543339】即可三、进国企，银行，事业单位，考公务员等等，这些单位是必需要提供真实教育部认证的，办理教育部认证所需资料众多且烦琐，所有材料您都必须提供原件，我们凭借丰富的经验，快捷的绿色通道帮您快速整合材料，让您少走弯路。留信网认证的作用: 1:该专业认证可证明留学生真实身份 2:同时对留学生所学专业登记给予评定 3:国家专业人才认证中心颁发入库证书 4:这个认证书并且可以归档倒地方 5:凡事获得留信网入网的信息将会逐步更新到个人身份内，将在公安局网内查询个人身份证信息后，同步读取人才网入库信息 6:个人职称评审加20分 7:个人信誉贷款加10分 8:在国家人才网主办的国家网络招聘大会中纳入资料，供国家高端企业选择人才留信网服务项目： 1、留学生专业人才库服务（留信分析） 2、国（境）学习人员提供就业推荐信服务 3、留学人员区块链存储服务 → 【关于价格问题（保证一手价格）】我们所定的价格是非常合理的，而且我们现在做得单子大多数都是代理和回头客户介绍的所以一般现在有新的单子我给客户的都是第一手的代理价格，因为我想坦诚对待大家不想跟大家在价格方面浪费时间对于老客户或者被老客户介绍过来的朋友，我们都会适当给一些优惠。选择实体注册公司办理，更放心，更安全！我们的承诺：客户在留信官方认证查询网站查询到认证通过结果后付款，不成功不收费！

The Building Blocks of QuestDB, a Time Series Database

javier ramirez

Talk Delivered at Valencia Codes Meetup 2024-06. Traditionally, databases have treated timestamps just as another data type. However, when performing real-time analytics, timestamps should be first class citizens and we need rich time semantics to get the most out of our data. We also need to deal with ever growing datasets while keeping performant, which is as fun as it sounds. It is no wonder time-series databases are now more popular than ever before. Join me in this session to learn about the internal architecture and building blocks of QuestDB, an open source time-series database designed for speed. We will also review a history of some of the changes we have gone over the past two years to deal with late and unordered data, non-blocking writes, read-replicas, or faster batch ingestion.

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一比一原版(UCSB文凭证书)圣芭芭拉分校毕业证如何办理

nuttdpt

毕业原版【微信:176555708】【(UCSB毕业证书)圣芭芭拉分校毕业证】【微信:176555708】成绩单、外壳、offer、留信学历认证（永久存档真实可查）采用学校原版纸张、特殊工艺完全按照原版一比一制作（包括：隐形水印，阴影底纹，钢印LOGO烫金烫银，LOGO烫金烫银复合重叠，文字图案浮雕，激光镭射，紫外荧光，温感，复印防伪）行业标杆！精益求精，诚心合作，真诚制作！多年品质 ,按需精细制作，24小时接单,全套进口原装设备，十五年致力于帮助留学生解决难题，业务范围有加拿大、英国、澳洲、韩国、美国、新加坡，新西兰等学历材料，包您满意。【我们承诺采用的是学校原版纸张（纸质、底色、纹路），我们拥有全套进口原装设备，特殊工艺都是采用不同机器制作，仿真度基本可以达到100%，所有工艺效果都可提前给客户展示，不满意可以根据客户要求进行调整，直到满意为止！】【业务选择办理准则】一、工作未确定，回国需先给父母、亲戚朋友看下文凭的情况，办理一份就读学校的毕业证【微信176555708】文凭即可二、回国进私企、外企、自己做生意的情况，这些单位是不查询毕业证真伪的，而且国内没有渠道去查询国外文凭的真假，也不需要提供真实教育部认证。鉴于此，办理一份毕业证【微信176555708】即可三、进国企，银行，事业单位，考公务员等等，这些单位是必需要提供真实教育部认证的，办理教育部认证所需资料众多且烦琐，所有材料您都必须提供原件，我们凭借丰富的经验，快捷的绿色通道帮您快速整合材料，让您少走弯路。留信网认证的作用: 1:该专业认证可证明留学生真实身份 2:同时对留学生所学专业登记给予评定 3:国家专业人才认证中心颁发入库证书 4:这个认证书并且可以归档倒地方 5:凡事获得留信网入网的信息将会逐步更新到个人身份内，将在公安局网内查询个人身份证信息后，同步读取人才网入库信息 6:个人职称评审加20分 7:个人信誉贷款加10分 8:在国家人才网主办的国家网络招聘大会中纳入资料，供国家高端企业选择人才留信网服务项目： 1、留学生专业人才库服务（留信分析） 2、国（境）学习人员提供就业推荐信服务 3、留学人员区块链存储服务 → 【关于价格问题（保证一手价格）】我们所定的价格是非常合理的，而且我们现在做得单子大多数都是代理和回头客户介绍的所以一般现在有新的单子我给客户的都是第一手的代理价格，因为我想坦诚对待大家不想跟大家在价格方面浪费时间对于老客户或者被老客户介绍过来的朋友，我们都会适当给一些优惠。选择实体注册公司办理，更放心，更安全！我们的承诺：客户在留信官方认证查询网站查询到认证通过结果后付款，不成功不收费！

原版制作(Deakin毕业证书)迪肯大学毕业证学位证一模一样

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学校原件一模一样【微信：741003700 】《(Deakin毕业证书)迪肯大学毕业证学位证》【微信：741003700 】学位证，留信认证（真实可查，永久存档）原件一模一样纸张工艺/offer、雅思、外壳等材料/诚信可靠,可直接看成品样本，帮您解决无法毕业带来的各种难题！外壳，原版制作，诚信可靠，可直接看成品样本。行业标杆！精益求精，诚心合作，真诚制作！多年品质 ,按需精细制作，24小时接单,全套进口原装设备。十五年致力于帮助留学生解决难题，包您满意。本公司拥有海外各大学样板无数，能完美还原。 1:1完美还原海外各大学毕业材料上的工艺：水印，阴影底纹，钢印LOGO烫金烫银，LOGO烫金烫银复合重叠。文字图案浮雕、激光镭射、紫外荧光、温感、复印防伪等防伪工艺。材料咨询办理、认证咨询办理请加学历顾问Q/微741003700 【主营项目】一.毕业证【q微741003700】成绩单、使馆认证、教育部认证、雅思托福成绩单、学生卡等！二.真实使馆公证(即留学回国人员证明,不成功不收费) 三.真实教育部学历学位认证（教育部存档！教育部留服网站永久可查）四.办理各国各大学文凭(一对一专业服务,可全程监控跟踪进度) 如果您处于以下几种情况： ◇在校期间，因各种原因未能顺利毕业……拿不到官方毕业证【q/微741003700】 ◇面对父母的压力，希望尽快拿到； ◇不清楚认证流程以及材料该如何准备； ◇回国时间很长，忘记办理； ◇回国马上就要找工作，办给用人单位看； ◇企事业单位必须要求办理的 ◇需要报考公务员、购买免税车、落转户口 ◇申请留学生创业基金留信网认证的作用: 1:该专业认证可证明留学生真实身份 2:同时对留学生所学专业登记给予评定 3:国家专业人才认证中心颁发入库证书 4:这个认证书并且可以归档倒地方 5:凡事获得留信网入网的信息将会逐步更新到个人身份内，将在公安局网内查询个人身份证信息后，同步读取人才网入库信息 6:个人职称评审加20分 7:个人信誉贷款加10分 8:在国家人才网主办的国家网络招聘大会中纳入资料，供国家高端企业选择人才

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Predictive Analysis for Airbnb Listing Rating using Scalable Big Data Platform

1. Jongwook Woo BigDAI CalStateLA KMIS - Fall 2021 November 12, 2021 Savita Yadav, syadav5@calstatela.edu Samyuktha Muralidharan, Jongwook Woo Big Data AI Center (BigDAI) California State University, Los Angeles Predictive Analysis for Airbnb Listing Rating using Scalable Big Data Platform

2. Big Data Artificial Intelligence Center (BigDAI) Jongwook Woo CalStateLA Contents  Why we need to predict Airbnb Listing Rating Dataset Details  Hardware Specifications  Machine Learning algorithms used Flowchart of the project Comparison of results of Spark ML algorithms

3. Big Data Artificial Intelligence Center (BigDAI) Jongwook Woo CalStateLA Need for Predicting Airbnb Listing Rating The objective is to build a model that classifies a property as highly rated or low rated based on the features of the listing. Helps Airbnb hosts to make simple changes to the properties they are listing in order to boost customer satisfaction and attract potential bookings. It can serve as a baseline to understand the factors that contribute to the popularity and rating of a listing.

4. Big Data Artificial Intelligence Center (BigDAI) Jongwook Woo CalStateLA Dataset Details  Dataset: Airbnb Listings  Total Dataset size: 4 GB, 400 MB  Dataset Format: CSV  Dataset URLs: https://public.opendatasoft.com/explore/dataset/airbnb- listings/table/?disjunctive.host_verifications&disjunctive.amenities&disjun ctive.features

5. Big Data Artificial Intelligence Center (BigDAI) Jongwook Woo CalStateLA Technical Specifications Spark: Databricks Subscription Databricks Runtime version: DBR 8.2 ML (Apache Spark 3.1.1, GPU, Scala 2.12) Instance: g4dn.xlarge Memory: 64.0 GB Nodes: 4 CPU Cores: 16 File System: DBFS (Data Bricks File System) Python Version 3.8.6

6. Big Data Artificial Intelligence Center (BigDAI) Jongwook Woo CalStateLA Machine Learning Algorithms Used Rating Prediction Spark ML: –Decision Tree Classifier –Random Forest Classifier –Gradient Boosted Tree Classifier –Logistic Regression –Support Vector Machine

7. Big Data Artificial Intelligence Center (BigDAI) Jongwook Woo CalStateLA

8. Big Data Artificial Intelligence Center (BigDAI) Jongwook Woo CalStateLA Airbnb Rating Prediction Predicting whether the listing has a good rating or not. Converting the Review Scores Rating column to categorical Review Scores Rating >= 80 -> High Rating Review Scores Rating < 80 -> Low Rating Using two-class classification algorithms to build a model to classify the listings as high rated and low rated, based on the features of the listing.

9. Big Data Artificial Intelligence Center (BigDAI) Jongwook Woo CalStateLA Rating Prediction Measurement with Big Data cluster on AWS Accuracy  We intend to reduce the number of False Positives to gain a higher Precision value. The AUC values are another significant factor to determine the accuracy. Computing Time: To train models.

10. Big Data Artificial Intelligence Center (BigDAI) Jongwook Woo CalStateLA Decision Tree o File Size: 400 MB o Split Train/Test: 70:30 o Time Taken to run : 1.15 minutes o AUC : 0.972 o Precision: 0.983 o Recall: 0.984

11. Big Data Artificial Intelligence Center (BigDAI) Jongwook Woo CalStateLA Random Forest o File Size: 400 MB o Split Train/Test: 70:30 o Time Taken to run : 2.13 minutes o AUC : 0.979 o Precision: 0.985 o Recall: 0.993

12. Big Data Artificial Intelligence Center (BigDAI) Jongwook Woo CalStateLA Gradient Boosted Tree o File Size: 400 MB o Split Train/Test: 70:30 o Time Taken to run : 2.35 minutes o AUC : 0.977 o Precision: 0.984 o Recall: 0.993

13. Big Data Artificial Intelligence Center (BigDAI) Jongwook Woo CalStateLA Logistic Regression o File Size: 400 MB o Split Train/Test: 70:30 o Time Taken to run : 1.47 minutes o AUC : 0.959 o Precision: 0.968 o Recall: 0.998

14. Big Data Artificial Intelligence Center (BigDAI) Jongwook Woo CalStateLA Support Vector Machine o File Size: 400 MB o Split Train/Test: 70:30 o Time Taken to run : 4.49 minutes o AUC : 0.958 o Precision: 0.966 o Recall: 0.998

15. Big Data Artificial Intelligence Center (BigDAI) Jongwook Woo CalStateLA Comparison of results of Spark ML Algorithms Models Computing Time Precision Recall AUC Decision Tree 1.15 mins 0.983 0.984 0.972 Random Forest 2.13 mins 0.985 0.993 0.979 GBT Classifier 2.35 mins 0.984 0.993 0.977 Logistic Regression 1.47 mins 0.968 0.998 0.959 SVM 4.49 mins 0.966 0.998 0.958

16. Big Data Artificial Intelligence Center (BigDAI) Jongwook Woo CalStateLA Conclusion  The metric computing time in the Decision Tree is the most efficient, with 1.15 minutes.  RF (and GBT) models have performed well to classify listings in the United States. RF model is the optimal Accuracy is more important

17. Big Data Artificial Intelligence Center (BigDAI) Jongwook Woo CalStateLA

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Predictive Analysis for Airbnb Listing Rating using Scalable Big Data Platform