Principle of mechanical mouse (wheel mouse) Mechanical mouse is also called semi-optical mouse. Its working principle is: at the bottom of mechanical mouse there is a ball that can roll freely. The f...

Generally speaking, the solar collector (30) has a compound parabolic non-image shape. In a preferred embodiment, the position of the collector is not set to rotate around the center of curvature of t...

Reason Optical imaging systems will encounter focusing problems. According to the principle of geometric optics, when the image plane moves along the optical axis near the focal plane position, with...

Application The high-energy focused field-effect ablation system brings new hope for prostate patients to get rid of chronic diseases. The system has been recognized by many domestic medical units s...

Glossary introduction The depth of focus is an important parameter to measure the exposure process window. It marks the relationship between the imaging quality of the exposure system and the positio...

Basic information The parity bit is a binary number that indicates whether the number of 1s in the binary number of a given location number is odd or even. The parity bit is the simplest error detect...

Insufficient memory classification Insufficient DOS memoryIf "Out of memory" appears when running DOS applications ) Failures can be checked and dealt with according to the following methods:1. Chec...

Basic information Synopsis In the eyes of director Sang Hee (Zhu Sang Wook), there is no goal he can’t accomplish, and no woman he can’t get. , As long as we can continuously advance towards success...

Production process In the process of production, this material is mainly formed by high-pressure grain refinement. Composition structure This material is tungsten as the dominant element, combined...

Introduction Basic Concepts90 Symptom Checklist (SymptomChecklist90, SCL-90), also known as Self-reporting Inventory (Self-reportingInventory), sometimes It is called Hopkin's Symptom List (HSCL, c...

ninety-seven type mortarsh2> XiaoGangBaob>p> Japanese Army in the infantry support weapons modeled after the German system to the main infantry gun for use mortars to take reservations....

History of Discovery Since the British chemist and physicist Dalton (J.John Dalton, 1766～1844) founded the atomic theory, for a long time people believed that atoms were It's like a solid glass bal...

Content introduction This book is the third revised color edition. It is a set of very good high school physics knowledge structure diagrams summarized by the author based on decades of teaching expe...

Development History The development of structural physics can be divided into three stages. The first stage (1920～1930): In order to understand the phenomenon of structural deformation, mud, petrol...

Definition The design of the storage structure and access method of the database on the physical device. Including selecting the access method for the relational mode, designing the physical storage...