statistical rethinking

Author: Wu Jun Http://www.google.com.hk/ggblog/googlechinablog/2006/04/blog-post_7327.html After reading the first article, I decided to buy a book. Preface You may not believe that mathematics is the best tool for information retrieval and natural language processing. It can clearly describe the actual problems in these fields and provide beautiful solutions. When people use mathematical tools to solve a language problem, they always lament the beauty of mathematics. We hope to introduce some m

Many Web users know that some statistical charts, such as pie charts, bar charts, trend charts, and stacked charts, are involved in many web systems. Speaking of this, I am very familiar with Web applications. jquery's highcharts can handle all the functions related to statistical charts. highcharts is also frequently used by myself. However, comrades who have used ArcGIS for JavaScript are deeply aware tha

/tomorrowtel Customlog "/www/log/tomorrowtel" combined alias/usage/"/www/log/tomorrowtel/usage/" Note here that each definition has a customlog command that specifies the storage file for the access log, and the alias command is used to allow the report generated by the log analysis to be accessed in a www.secfocus.com/usage/manner. The log file is saved through the configuration above. However, a problem encountered is the rotation of the log file, because the log is alw

Objects | data | database | statistics If Oracle uses cost analysis when executing SQL, all cost analysis sources rely on the system's statistical analysis table (Dba_tables, dba_indexes, dba_tab_columns) data, if the statistical analysis data is inaccurate, That could make the path performed by Oracle's analysis extremely poor, so statistical analysis data is th

Concept:Oracle statistical information: it is stored in the data dictionary and describes the object details in the Oracle database from multiple dimensions. CBO uses these statistics to calculate the cost of each path. Category:Statistical information of tables, indexes, columns, systems, data dictionaries, and internal objects Collect statistics:The analyze command and the dbms_stats package. You can use tables, indexes, columns, and data dictiona

Descriptive statistical analysis is to the data itself, using statistical indicators to describe its characteristics of the analysis method, this description seems simple, in fact, is a lot of advanced analysis of the basic work, many advanced analysis methods for the data have certain assumptions and conditions, which can be judged by descriptive statistical ana

PHP allows you to draw 3D slice statistical charts and image scaling instances ,. PHP to draw a 3D sector statistical chart and image scaling example, 1. use the function of phpgd library to draw a 3D sector statistical chart phpheader (content-type, texthtml; charsetutf-8 ); * The slice statistical chart PHP allows yo

Although Baidu's statistical tool is an official analysis tool released by Baidu, it has never been used by many people. more people are still choosing googleanalytics. Fortunately, compared with the stable googleanalytics, Baidu statistician Although Baidu's statistical tool is an official analysis tool released by Baidu, it has never been used by many people. more people are still choosing google analytic

from rule to statistic and statistical language modelhttp://blog.csdn.net/u012637501I. Natural language processing-from rules to statistics1. Rule-based Natural language processing in the the 1960s, the question before scientists was how to make machines understand natural language. At that time, the common understanding was to do two things first, namely parsing the statement (grammar) and acquiring semantics. As Western linguists have made a very fo

Apply a statistical skin tone model and skin color segmentation relative to the block Origin Energy 1. Skin Color Segmentation Introduction (1) A brief introduction to the statistical skin color modelIn the previous article, we used the training data to successfully calculate the posterior probability P (cs|v) of the training data, that is, the probability that the known pixel value determines the color of

We all know the actual application optimizer for PL/SQL statement execution in Oracle databases, which has cost-based related optimizer CBO) and regular-based optimizer RBO ). The actual Optimization Method of RBO depends on a set of strict syntax rules. As long as the statements written according to the rules, no matter whether the data table or index content changes, the execution plan of PL/SQL statements is not affected ". CBO has been introduced since Oracle version 7. Many new technologie

Optimizer for PL/SQL statement execution in Oracle databases, including cost-based optimizer (CBO) and rule-based optimizer (RBO ). The RBO optimization method depends on a set of strict syntax rules, as long as the statements written according to the rules, regardless of whether the data table and index content change, the execution plan of PL/SQL statements is not affected ". CBO has been introduced since Oracle version 7. Many new technologies adopted by Oracle version 7 are only based on CBO

Android Statistical Chart MPAndroidChart., mpandroidchart Android Statistical Chart MPAndroidChart MPAndroidChart is an open-source third-party Statistical Chart library on the Android platform. It can draw a variety of complex and rich statistical charts, such as common line charts, pie charts, bar charts, scatter cha

The statistical function in the Yii-relations Data Association. Associated query. Yii also supports the so-called statistical query (or aggregate query ). It refers to the retrieval of the aggregated information of associated objects, such as the number of comments for each post and the average level of associated queries for each product. Yii also supports the so-called

variable diagram is described here, do not make the chart too complicated, otherwise you will lose the chart "intuitive" advantages.To show the correlation of 3 variables, it is best to use three-dimensional coordinates of the three-dimensional statistical chart, but because in fact still on the plane to the three-dimensional diagram, the three-dimensional map is not convenient to use.(1) When a variable is a categorical variable, the two-dimensional

How do I count the total number of times when the data volume is large? For example, a table contains 5 million data records, and the traditional method is count (), which is very inefficient. How do I count the total number of times when the data volume is large? For example, a table contains 5 million data records, and the traditional method is count (), which is very inefficient. Someone on the Internet said that mysql triggers were used to insert the

1.1 Statistical learningConcept Statistical learning (statistical learning) is a subject of computer-based probabilistic statistical modeling of data construction and the use of models to predict and analyze data, and statistical learning is also a

Overview of parallel and concurrent collection statisticsIn order to increase the efficiency of statistical information collection, Oracle has introduced a method of parallel and concurrent collection of statistics as application data increases and the amount of the table is increased.This article introduces the relevant knowledge content of parallel and concurrent collection statistics and some cases, and focuses on the collection of concurrency stat

Terms:canonical Ensemble regular ensemble; partition function distribution functionsThe day before the review of statistical mechanics required basic mathematical physics background knowledge, today formally entered the first threshold of statistical mechanics. In the study of physical chemistry/chemical thermodynamics, you will hear the two concepts of "ensemble" and "sub-function" many times, in the absen

several options:A default way, it can also be a full-table scan update, and there is a sampling percentage specified as follows: --Updates all statistics on the table by default update statistics TableName --Sampling the update STATISTICS TableName for the specified statistics using a full table Scan (index _or_statistics__name) with FullScan --Sampling the update STATISTICS TableName in the specified statistics, using the specified sampling percentage (index_or_ STATISTICS__NAME1,INDEX_OR_STA