Wrapper models use an internal cluster validity criterion in conjunction with a clusteringalgorithm that is applied to an appropriate subset of features. Cluster validity criteria areused to evaluate the quality of clustering and are discussed in detail in Sect. 6.9. The ideais to use a clustering algorithm with a subset of features, and then evaluate the qualityof this clustering with a cluster validity criterion. Therefore, the search space of differentsubsets of features need to be explored to determine the optimum combination of features.As the search space of subsets of features is exponentially related to the dimensionality,a greedy algorithm may be used to successively drop features that result in the greatestimprovement of the cluster validity criterion. The major drawback of this approach is thatit is sensitive to the choice of the validity criterion. As you will learn in this chapter, clustervalidity criteria are far from perfect. Furthermore, the approach can be computationallyexpensive.Another simpler methodology is to select individual features with a feature selection cri-terion that is borrowed from that used in classification algorithms. In this case, the featuresare evaluated individually, rather than collectively, as a subset. The clustering approachartificially creates a set of labels L, corresponding to the cluster identifiers of the individualdata points. A feature selection criterion may be borrowed from the classification literaturewith the use of the labels in L. This criterion is used to identify the most discriminativefeatures:1. Use a clustering algorithm on the current subset of selected features F, in order to fixcluster labels L for the data points.2. Use any supervised criterion to quantify the quality of the individual features withrespect to labels L. Select the top-k features on the basis of this quantification.There is considerable flexibility in the aforementioned framework, where different kinds ofclustering algorithms and feature selection criteria are used in each of the aforementionedsteps. A variety of supervised criteria can be used, such as the class-based entropy or the Create an RPA Bot (Show Code / Commands) in the Automation Anywhere platform. You are the new IT consultant / developer for a small local law enforcement agency. Because of your status as the junior consultant, you were task by the agency’s Detective squad to complete the Two below system request. Part 1 Create a BOT to perform a background check (gather information) on a person of interest within a secured Local (State) Database (Database 1) and a secured Nationwide (Federal) Database (Database 2). Follow the below process. (Show Code / Commands: Refer to example Yahoo Finance attachment for code out lay) 1) Detective / Investigator make an inquiry request to RPA bot. (Search Criteria: Name, DOB, Gender) 2) RPA bot log into secured Local (State) database (Database 1). 3) BOT downloads secured Local (State) data file. 4) RPA bot log into secured Nationwide (Federal) database (Database 2) 5) BOT downloads secured Nationwide (Federal) data file. 6) RPA bot compare data from both secured databases. (Comparing and Compiling) 7) Detailed Background check report emailed to Detective / Investigator. Part 2 Create a BOT to perform a social media check (gather information) on a person of interest (using search criteria) within the given four platforms (Facebook, Instagram, Snapchat, WhatsApp) Follow the below process. (Show Code / Commands: Refer to example Monster.com attachment for code out lay) 1) Detective/Investigator make an inquiry request to RPA bot. (Search Criteria: Name, Gender, Geographical Location) 2) RPA bot launch and log into Facebook. 3) BOT downloads Facebook data file. 4) RPA bot launch and log into Instagram. 5) BOT downloads Instagram data file. 6) RPA bot launch and log into Snapchat. 7) BOT downloads Snapchat data file. 8) RPA bot launch and log into WhatsApp. 9) BOT downloads WhatsApp data file. 10) RPA bot compare data from all four platforms. (Comparing and Compiling) 11) Detailed Social Media report emailed to Detective / Investigator. In the context of virtual memory, what is thrashing? When is an algorithm subject to thrashing? 2) How can you use a TS instruction to implement a binary semaphore (Note: This question does NOT ask how to implement a general semaphore)? 3) In virtual memory, given a page frame allocation of 3 (w=3) and assuming that the primary memory is initially unloaded. Suppose that R = 0 1 2 1 2 1 2 3 0 1 2 3 4. What is the behavior of the working set algorithm using LRU? How many page faults do you have? 4) A certain computer provides its users with a virtual-memory space of 64GB bytes. The computer has 4GB bytes of primary memory. The virtual memory is implemented by paging, and the page size is 1,024 bytes. Please indicate how the virtual address is translated using a paging scheme. Please indicate how many bits are used to represent the page number, frame number, and line number. 5) Process P1 and P2 need to access the following shared information: 1. Array L: L is an array of integer; 2. Integer Length: Length indicates how many integers the array L holds. When P1 is invoked, P1 will insert one integer into array L and increase Length by 1; When P2 is invoked, P2 will remove one integer from array L and decrease Length by 1. Please design one monitor to solve the above problem. 6) Please design a solution to solve the following problem. Please use P and V operations (NOT using monitor). There are two processes P0 and P1. P0 and P1 share a variable balance. Suppose that we enforce the order of the following events: 1. P0 does some computation, and then updates the value of balance; 2. P1 reads the value of balance, and does some computation. That is, P1 can only read the value of balance after P0 updates the value of balance. 7) Please write down the C pseudo-code for the following program. You pseudo-code needs to include the correct name of important APIs. Your pseudo-code needs to have the correct program structure. You do NOT need to write #include statements. One process P first creates an anonymous pipe my_pipe. It then creates two threads t1 and t2. So there are two threads. a.The parent process P does the following: 1. pass the ID of my_pipe to t1 and t2; 2. wait for the termination of t1 and t2; 3. exit b.The thread t1 does the following: 1. Obtain the ID of my_pipe passed from P; 2. Open a data file my_data_file; 3. Read the content from my_data_file line by line, and write the content to t2 through my_pipe; 4. 4. Close file my_data_file c.The thread t2 does the following: 5. Obtain the ID of my_pipe passed from P; 6. Read information from my_pipe 7. Print out the information. 8) In the class project – Shell program: what is the program structure for your Shell program? Please use C or C++ pseudo-code to write down Shell program structure.Image transcription text11.8 A 69-kV transmission line is supplied through a transformer by a 13.2-kV gener-ator. The high-voltage side of the transformer is wye connected with its neutral solidlygrounded, and the generator side is connected in delta. The positive-se… Show more… Show moreImage transcription text4. An abc-positive sequence voltagesupply feeds a balanced three-phase A?A system. The impedanc… Show more… Show moreImage transcription textQuestion 3 1 pts The collegeadministration wants to determine theaverage GPA in a statistic… Show more… Show moreImage transcription textQuestion 03: Part (a): We have 16-bit instruction andfollowing set of opcodes 0110 = Add AC fromMemory 0111 = Load AC from Memory 0… Show more… Show moreEngineering & TechnologyComputer ScienceCOMPUTER S 123
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