uptime measurement

Serialization] fourth lecture on measurement accuracy, repeatability, reproducibility and standard deviation Http://www.jlbjb.com/edu/show.asp? Id = 443 Metering lectures: General metering terminology lecturesShi changyan, China Institute of Metrology I. Measurement Accuracy refers to the "consistency between measurement results and the truth value of the oil vo

Content:Master the basic concepts, tasks, and functions of engineering measurement, and understand the geoid, geoid, and geographic coordinate system (Earth and astronomy) concepts of independent plane Cartesian coordinate system, Gaussian plane Cartesian coordinate system, absolute elevation, relative elevation and height difference; understanding the limits of water plane replacing level, organization principles of

Measurement process framework: Measurement and analysis process fields include: Describe in detail the purpose of measurement and analysis so that it is consistent with the identified information and purpose Detailed description of measurement, data collection, storage mechanism, analysis technology, and report and

Define dimension granularity in a measurement value group : Users may need to define fact data table dimensions of different granularities or specificity for different purposes. For example, sales data for distributors or Internet sales can be recorded once a day, while sales quota information may be recorded on a monthly or quarterly basis. In these cases, you may need time dimensions to have different granularities or levels of detail for these dif

For example, the database administrator needs to enable the Oracle database system to perform self-monitoring. When the server's CPU usage reaches, the system automatically sends an alarm to the database administrator. When the tablespace usage reaches 90% of the total capacity, the system automatically notifies the database administrator. These functions are very useful for database administrators. The Enterprise Manager of the Oracle database system provides multiple ways for administrators to

Software Measurement knowledge point 1. What types of measurements are there? What are their differences? What are the phases of measurement as a process? 2. What are the entities of software measurement? How to Use gqm to define a measurement framework? How to describe the target in gqm? 3. What is function analysis?

Introduction to Optical Fiber Temperature Measurement Technology in data centers The data center has high temperature requirements and requires 365 days of constant temperature throughout the year. However, in fact, the temperature in different locations is different within the data center. If the ventilation is not good, the temperature in the same data center may vary by a few degrees, in this way, the temperature at the local location is relativel

Lean software measurement-Practitioner's observation and thinkingAuthor of basic information: Zhang song Press: People's post and telecommunications Press ISBN: 9787115308832 mounting Date: April 2013 publishing date: 16 open pages: 260 versions: 1-1 category: Computer For more information, lean software measurement-Practitioner's observation and thinking introduction computer books software

In software development, the fundamental purpose of software measurement is to manage the needs. Improve the software process by using measurements. People cannot manage things that cannot be measured. In the history of software development, we can realize that the software crisis faced by large software in the late 1960s s reflects the importance of management in software development. For management personnel, the visibility of software processes can

There are many Process metrics or projects in the test phase, including the Software Test Progress, test coverage, test defect appearance/arrival curve, test defect accumulation curve, and test efficiency. During the testing process measurement, the measurement should be based on software scale measurement (such as function points, object points, etc.), complexit

SIGCOMM17SummaryIncludes traffic monitoring, data collection, and prevention of a range of network attacks in existing network measurement tasks. The existing sketch-based measurement algorithms have serious performance loss, large computational overhead, and inadequate measurement accuracy, while the hardware-based optimization method is not suitable for sketch.

Once a business occurs after a material is created in SAP, it is difficult to modify its basic measurement unit. Because the Organization cannot meet business requirements, it is often required to create a new material to replace the old one. In this case, in addition to deleting all the outstanding services on the old materials, you also need to replace the old materials in the process and BOM. In particular, when old materials exist in multiple Bom,

Now, wireless designers are faced with the arduous task of designing world-class products. Many wireless technical standards define the technical indicators of power, but ignore the specific steps of Power Measurement. Therefore, designers often encounter Errors During measurement. Because the ofdm rf waveforms used in IEEE 802.16 are complex, more errors occur when measuring mobile WiMAX signals. This arti

logs/error.log info; #pid logs/nginx.pid; #pid文件, Location specified at compile time events { Use Epoll; #定义I/O model worker_connections 51200; #设定每个工作进程所处理的最大连接数. The worker_processes in main determines the maximum number of connections that can be processed by the Nginx}http{include mime.types; #设定mime类型, the type is defined by the Mime.type file Default_type application/octet-stream; Sendfile on; #sendfile instruction Specifies whether Nginx calls the Sendfile function (z

Relative humidity measurement using IC SensorsXie Changjiang youlihuaSummary: Based on the comparison of various relative humidity measurement methods and sensors, this paper introduces the characteristics and usage of integrated humidity sensor based on examples, and points out the influencing factors and compensation methods of the conditions, the specific implementation line of relative humidity detectio

In the process of data analysis and data mining, we often need to know the differences between individual, and then evaluate the similarity and category of individual. The most common is correlation analysis in data analysis, classification and clustering in data mining.AlgorithmSuch as K-Nearest Neighbor (KNN) and k-means ). Of course, there are many ways to measure individual differences. Recently, I have consulted relevant materials and listed them here. To facilitate the following expla

"In fact, when Hewlett-Packard entered China in 1981, the first to set up is the Technical Services department, which demonstrates our commitment to serve China, demonstrating our determination to take root in China." The value of metrology and calibration services to our customers is increasingly being valued by German technology. "is the German technology maintenance measurement Service Manager Jin Yue Mountain said.From Hewlett-Packard to Agilent t

1 IntroductionIn recent years, with the wide application of the IP network technology, more and more researchers are paying attention to the service quality issues that the IP network can provide, scientific and reliable measurement and evaluation of service quality is a critical issue in Network Measurement and network planning and design. As a pioneer in the Next Generation aggregation Service Network Bas

From a photography perspective, correct exposure depends on many different factors. Some of them are what we usually know and can be confirmed in advance. However, if there are other factors, you must use an appropriate metering table. For example, the film speed, the maximum aperture of the lens, the available shutter speed, and the aperture range are all known factors. Unknown factors are the illumination of light and reflection of objects. Therefore, correct

Programmer measurement: Improving the analytics of a software team original title: codermetrics: Analytics for Improving Software Teams Author: Jonathan Alexander [Translator's profile] Translator: zhang Yu original Zhou Feng Zhang Gang song Lifen series name: O 'Reilly boutique book series Publishing House: Machinery Industry Publishing House ISBN: 9787111401407 Release Date:-3-6 published on: March 2013: 16 open pages: article 1: Classification of v