... Rear Front Front Rear Airflow Management in the Data Center There are many simple solutions to improve overall airflow ef- Cabinets ficiency in the data center that can be implemented immedi- ... or motion sensors to Another ready means to improve cooling is removing block- dim the lights when no one is in the data center; lights ages under the raised floor The basic cable management ... aisles hot and the cold more cooling dollars in the data center There is probably an aisles cold Aisles designated for cold air situate servers and other active program for cleaning above the raised...
Ngày tải lên: 10/12/2013, 19:15
Creating and Management Data Base
... Cú pháp để chỉnh sửa sở liệu: ALTER DATABASE database_name { | | | MODIFY NAME = new_database_name | COLLATE collation_name ... tạo Cú pháp: CREATE DATABASE database_snapshot_name ON ( NAME = logical_file_name, FILENAME = ‘os_file_name’ ) [ , n ] AS SNAPSHOT OF source_database_name [;] RDBMS and Data Management/ Session ... file liệu file giao dịch RDBMS and Data Management/ Session 7/14 of 25 Nhóm tập tin ghi vết giao dịch Thêm nhóm tập tin tạo CSDL Cú pháp: CREATE DATABASE database_name [ ON [ PRIMARY ] [ ...
Ngày tải lên: 01/09/2012, 09:09
Data Mining Tutorial
... if there’s no relationship Multiple testing α= Pr{ falsely reject hypothesis 2} α= Pr{ falsely reject hypothesis 1} Pr{ falsely reject one or the other} < 2α Desired: 0.05 probabilty or less Solution: ... small dataset, need all observations to estimate parameters of interest • Data mining – loads of data, can afford “holdout sample” • Variation: n-fold cross validation – Randomly divide data into ... as holdout Pruning • Grow bushy tree on the “fit data • Classify holdout data • Likely farthest out branches not improve, possibly hurt fit on holdout data • Prune non-helpful branches • What...
Ngày tải lên: 04/03/2013, 14:32
data-mining-tutorial
... KDnuggets 45 Making the most of the data Once evaluation is complete, all the data can be used to build the final classifier Generally, the larger the training data the better the classifier (but ... predictive is the model we learned? Error on the training data is not a good indicator of performance on future data The new data will probably not be exactly the same as the training data! Overfitting ... Many Names of Data Mining Data Fishing, Data Dredging: 1960 used by statisticians (as bad name) Data Mining :1990 - used in DB community, business Knowledge Discovery in Databases (1989-)...
Ngày tải lên: 04/03/2013, 14:32
Accessing the Right Data Values
... expressionField.Text); This code adds the expression columns to the sample table, passing the column name, the data type from the System namespace, and the field expression Run the program On the Add Expression ... expressionField.Text) This code adds the expression columns to the sample table, passing the column name, the data type from the System namespace, and the field expression Run the program On the Add Expression ... value from the user and then uses it as the primary key lookup value in the application’s sample DataTable Most of the code exists to ensure that the user provides a valid ID Locate the Try Catch...
Ngày tải lên: 03/10/2013, 00:20
... is usually the primary key of the parent entity, because as the primary key uniquely defines the parent, the child must in turn be associated with a unique instance of the parent The foreign ... normalizing a database, you accomplish the following Data consistency maintained " Lead-in Fewer null values The benefits of a normalized database are as follows: " Data consistency maintained Data is ... Designing Data Services and Data Models Module 3: Using a Conceptual Design for Data Requirements Module 4: Deriving a Logical Data Design Module 5: Normalizing the Logical Data Design In the next...
Ngày tải lên: 16/10/2013, 13:15
2 Understanding the Oracle Data Guard Architecture
... standby databases • The operating system and platform architecture for the primary and standby databases must be the same • The operating system releases for the primary and standby databases ... this lesson, you should be able to the following: • Describe the Data Guard architecture • Explain the operational requirements of Data Guard • Describe how Data Guard processes, transports, and ... different • If all databases are on the same system, verify that the OS allows you to mount more than one database with the same name 2-3 Copyright © 2006, Oracle All rights reserved Data Guard Operational...
Ngày tải lên: 26/10/2013, 20:15
Module 9: The Transactional Data Access Layer
... CRM The first step in the operation of the CRM is the client component’s creation of the CRM Worker The client component then begins using the CRM Worker In the case of the XML CRM Worker, the ... satisfy the requirements of the Create Requisition use case In the class, include the necessary methods to obtain the next database ID The class should also cache database IDs from the database ... requests from the business logic layer The transactional DAL then processes the requests by delegating the requests to the data services layer The transactional DAL can return to the business...
Ngày tải lên: 05/11/2013, 12:15
Identifying common errorss in written english of students of english at the intermediate level
... groups, find out the errors in their work and try to correct these ones Then, the teacher asks them to exchange their works to their friends in other pairs or group so that they can see their friends ... of the class It is better for the teacher to hide the name of the author The teacher asks students to find out the errors One or two students come out and write the answer on the board Then, the ... from their performance are the common English written errors that they usually make in their writing Since the students were conscious of the importance of doing well in the tests, they tried their...
Ngày tải lên: 19/12/2013, 10:39
Tài liệu Activity 4.2: Creating a Logical Data Model ppt
... label the line with the relationship verb This is the initial ER diagram for the logical data model Answer in v04_1609a_act42-1.bmp Activity 4.2: Creating a Logical Data Model Exercise 2: Determining ... entities Join the group to which you have been assigned by the instructor Review the entities identified in Activity 4.1 Draw a box for each entity in the space below, and label the box with the entity’s ... diagram, ask the question “Can the child exist if the parent does not exist?” • If the answer is “Yes,” existence is optional Denote the relationship with a dashed (broken) line • If the answer...
Ngày tải lên: 21/12/2013, 06:16
Tài liệu Module 8: The Nontransactional Data Access Layer doc
... of the data Module 8: The Nontransactional Data Access Layer ! 37 Keyset A keyset cursor creates a copy of the keys from the dataset on the server As the client requests records from the dataset, ... Server™ database To create a new order, a system must know the name of the computer running SQL Server, the name of the database, and the names of the tables in which the orders are stored If the ... changes in the business logic and facades A DAL isolates the rest of the system from changes in the data services Using the DAL, the business logic or facades only pass or request the data they need,...
Ngày tải lên: 21/12/2013, 06:17
Tài liệu Module 5: Normalizing the Logical Data Design docx
... is usually the primary key of the parent entity, because as the primary key uniquely defines the parent, the child must in turn be associated with a unique instance of the parent The foreign ... normalizing a database, you accomplish the following Data consistency maintained " Lead-in Fewer null values The benefits of a normalized database are as follows: " Data consistency maintained Data is ... Designing Data Services and Data Models Module 3: Using a Conceptual Design for Data Requirements Module 4: Deriving a Logical Data Design Module 5: Normalizing the Logical Data Design In the next...
Ngày tải lên: 21/12/2013, 06:18
Tài liệu Instructor Notes Module 5: Normalizing the Logical Data Design doc
... ! To prepare for the activity Complete the activity Look at the answers and be able to explain them Activity 5.2: Normalizing Data In this activity, students will normalize the logical design ... Normalize a logical data design to third normal form ! To prepare for the activity Complete the activity Look at the answers and be able to explain them Module Strategy Use the following strategy ... through a new data problem in addition to the ones supplied in the text Your goal is that students be able to almost “sense” whether data is normalized when it is presented to them ...
Ngày tải lên: 17/01/2014, 09:20
Tài liệu Activity 6.1: Translating the Logical Data Design pdf
... findings to the class Table Field Data type 31 32 Activity 6.1: Translating the Logical Data Design Table Field Data type Table Field Data type Table Field Data type Activity 6.1: Translating the Logical ... Translating the Logical Data Design Exercise 1: Deriving a Physical Data Design from a Logical Data Design In this exercise, you will use the logical data design presented below and derive a physical data ... Logical Data Design Table Field Data type Table Field Data type THIS PAGE INTENTIONALLY LEFT BLANK Table Field Data type 33 34 Activity 6.1: Translating the Logical Data Design Table Field Data...
Ngày tải lên: 17/01/2014, 09:20
Tài liệu Module 9: The Transactional Data Access Layer pptx
... CRM The first step in the operation of the CRM is the client component’s creation of the CRM Worker The client component then begins using the CRM Worker In the case of the XML CRM Worker, the ... satisfy the requirements of the Create Requisition use case In the class, include the necessary methods to obtain the next database ID The class should also cache database IDs from the database ... requests from the business logic layer The transactional DAL then processes the requests by delegating the requests to the data services layer The transactional DAL can return to the business...
Ngày tải lên: 17/01/2014, 09:20
Tài liệu cisco migrationn_Integrating Virtual Machines into the Cisco Data ppt
... VMs in the data center, refer to Integrating ESX Hosts into the Cisco Data Center Architecture, page 24 VLAN Tagging Historically, the physical access switches in the data center provide the VLAN ... internal networks of VMs local to the ESX host VMnets use the virtual switch to link VMs on the same VLAN The system bus provides the transport and the CPU manages the traffic VMnets are generally ... modification to the default utilization scheme is made Virtual Memory The memory resources of the ESX host are divided among multiple consumers: the kernel, the service console, and the VMs The ESX virtualization...
Ngày tải lên: 24/01/2014, 10:20
Tài liệu cisco migrationn_This document describes how to deploy VMware ESX Server 2.5 into the Cisco data center architecture. doc
... in the network, the routers in the network consume additional CPU resources The routers consume additional resources with both the control plane of IPmc and the data replication function The ... 17 ms The second test, “IP unicast IPmc”, is the same traffic profile with the addition of an IPmc stream to each of the 1000 branches in the topology The number of VoIP calls remained the same, ... routers and spreading the load of the VPN terminations across more devices allows for the headend routers to “share” CPU load, thus making the solution more scalable Note In the interest of clarity...
Ngày tải lên: 24/01/2014, 10:20
Tài liệu Programming Neural Networks in JavaProgramming Neural Networks in Java will show the intermediate ppt
... a series of chronological data The neural network uses the provided data to train itself, and then attempts to extrapolate the data out beyond the end of the sample data This is often applied ... trained to the individual user Data mining is a process where large volumes of data are “mined” for trends and other statistics that might otherwise be overlooked Very often in data mining the programmer ... exist The embodiment of the Church-Turing thesis is the Turing machine The Turing machine is an abstract computing device that illustrates the Church-Turing thesis The Turing machine is the ancestor...
Ngày tải lên: 14/02/2014, 20:20
Tài liệu The Protein Data Bank: a historical perspective ppt
... accessibility of the data and the growing importance of understanding the data has meant that the PDB’s user community has grown from the community of crystallographers that banded together to form the archive ... respectively When the PDB updates the ftp site each week, most pharmaceutical companies download the new data for inclusion in their own in-house databases These structural data are used to aid the discovery ... While the early users of the PDB were mostly crystallographers who used the resource to store their data and to review other structures for comparison with their own, now more than half of the...
Ngày tải lên: 16/02/2014, 11:20