CIS 545 Homework 4 : Machine Learning¶ Due April 10th, 10pm EST¶ Worth 100 points in total¶ Hopefully everyone is safe and doing well! We hope to continue to equip your data science toolkit with new skills through out the remainder of the semester. This homework will give you a hands on experience with machine […]
The “for”statement in Python The “for”statement in Python Nick Szirbik Sept. 2020 Week 2 of the DAPOM course (3) A for loop is used for iterating over a collection (that is either a list, a tuple, a dictionary, a set, or a string). Looping through a string: for each_character in “banana”: print(each_character) Looping through a list: fruits = [“apple”,”banana”,”cherry”,”orange”,”kiwi”,”melon”,”mango”] for each_fruit in fruits:
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Dataframe operations¶ In [1]: from pyspark.sql import Row row = Row(name=”Alice”, age=11) print row print row[‘name’], row[‘age’] print row.name, row.age row = Row(name=”Alice”, age=11, count=1) print row.count print row[‘count’] File ““, line 4 print row ^ SyntaxError: Missing parentheses in call to ‘print’. Did you mean print(row)? In [ ]: # Data file at https://www.cse.ust.hk/msbd5003/data/building.csv df = spark.read.csv(‘../data/building.csv’,
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In [1]: # import package # import csv file import pandas as pd remarks = pd.read_csv(‘./Clean_dataset.csv’) df = pd.DataFrame(remarks) In [2]: df Out[2]: Unnamed: 0 class tweet Label clean_tweet tokens 0 0 2 !!! RT @mayasolovely: As a woman you shouldn’t… Neutral woman complain clean hous man alway take trash [‘woman’, ‘complain’, ‘clean’, ‘hous’, ‘man’, … 1
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Comma splices Intro to C CSE 2421 1 C is procedural, not object-oriented C is fully compiled (to machine code), not to byte-code C allows direct manipulation of memory (via pointers) C does not have garbage collection; the software writer has to do explicit memory management when it is required, and failure to do so
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EZW * * Java程序设计作业 —影响力最大化问题 * * 在线社会网络 * * 什么是信息扩散？ 社会媒体的用户处在各种在线社会网络（Facebook的好友网络、微博的关注网络等）中，当接触到其周围用户发布或者传播的信息时，会受到网络中与其邻近的人的影响，或者受到信息本身的影响而继续传播某些信息，导致信息在网络上逐渐扩散，影响越来越多的人。 * * 影响力最大化问题定义 给定一个社会网络、一个扩散模型和一个数值k，任务就是如何在社会网络上获取一个规模为k的节点集合，使得这个节点集合可以达到影响力最大化的效果。 主要应用于病毒式市场营销、谣言控制等实际场景。 单独选择具有较大影响力的节点无法达到最佳效果。 两个关键问题 信息扩散模型 种子节点选择策略 * * 信息扩散模型 初始的激活状态节点集合A。 在时刻t ，新近被激活的节点u对它的邻接节点v产生影响，成功的概率为Pu,v。若v有多个邻居节点都是新近被激活的节点，那么这些节点将以任意顺序尝试激活节点v。如果其中一个成功，其他节点将不再尝试。 如果节点v被激活成功，那么在t+1时刻，节点v转为激活状态，将尝试激活其非激活状态的邻居节点；否则，节点v在t+1时刻状态不发生变化。 该过程不断进行重复，直到网络中不存在有新近激活状态节点时，传播过程结束。 * * 信息扩散模型 影响力：被激活节点的数量。 * * 节点选择策略 * * 从文件读取内容 * * 从文件读取内容 注：修改文件路径 * * 容器类 Vector vec = new Vector(); Node node1 = new
In [1]: from IPython.core.interactiveshell import InteractiveShell InteractiveShell.ast_node_interactivity = “all” %matplotlib inline import pandas as pd import numpy as np import matplotlib.pyplot as plt import seaborn as sns sns.set_style(“whitegrid”) sns.set_context(“notebook”) #sns.set_context(“poster”) In [2]: # XGBoost is not included in the Anaconda distribution (yet… ) # Therefore you need to install it first # ! pip install xgboost #
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PowerPoint Presentation What is the Cloud? 1 1 Cloud Computing in a Nutshell Cloud Computing is the transformation of computer hardware, software and networks into a Utility just like the your Electric Company, Water Company, or Gas Company. 1 instance runs 1000 h = 1000 instances run 1 h 2 2 Defining the Cloud “Cloud
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PowerPoint Presentation Transactions & Concurrency Control 2 R&G 16/17 There are three side effects of acid. Enhanced long term memory, decreased short term memory, and I forget the third. – Timothy Leary 1 TWO PHASE Locking Two Phase Locking (2PL) The most common scheme for enforcing conflict serializability A bit “pessimistic” Sets locks for fear
COSI134 Project 4: Train a neural network parser¶ Due: December 17, 2020 In the fourth and final project, you are asked to train a neural network parser using the Penn TreeBank data. You are asked to use the encoder-decoder framework and experiment with the various attention mechanisms to observe their effect on the performance of
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