What knowledge do you need to be an android engineer?

If you have not learned it before, you might as well learn it in advance. You can refer to "C Language Programming" by Tan Haoqiang published by Tsinghua University Press. , the reasons for recommending this book are, firstly, that it has been tested for many years and should be said to be relatively rigorous; secondly, most of the C language textbooks offered by colleges and universities use it as a teaching material, so whether you buy Whether borrowing or borrowing, it is easy to find. In addition, there are also some teaching videos in this area on the Huaqing Vision website that can be viewed together. Secondly, if you are interested in developing games in the future, you'd better have some basic knowledge of data structures and algorithms. This is what I insisted on emphasizing to the students on the podium at Huaqing Vision. Although most of the data structures in modern high-level programming languages ??have been implemented for us in their class libraries, under normal circumstances, we can use them directly. But if you can understand its principles, when you need to choose between these data structures and algorithms, you may have a clearer idea of ??which data structure or algorithm you should choose. In addition, linear algebra plays a very important role in graphics and image processing. If you can master some basic knowledge in this area, you will undoubtedly be more powerful in subsequent studies. For example, in Android, there is a class Matrix used for graphics transformation, which is a little difficult to use. In fact, its theoretical basis is the matrix in linear algebra. If you understand the basic algorithm of matrices, the use of this class can be said to be easy... You can go to the website to see it yourself, there are pictures. . . What knowledge do pre-sales engineers need?

1. Organize and formulate the preparation of technical solutions for system integration projects, the preparation and explanation of tender documents, and the ability to answer questions from users.

2. Ability to cooperate with account managers to complete technical exchanges and technical presentations for users.

3. Cooperate with business departments to improve user communication, data sharing, and technical coordination capabilities.

4. Ability to cooperate with marketing personnel to complete system demonstrations and write product promotional materials.

5. Ability to cooperate with partner manufacturers in technical exchanges.

Mainly responsible for market research, engineering survey, and contract signing. What knowledge do electrical engineers need?

I don’t know what kind of enterprise your company is and what your company operates. The basic requirements for general electrical engineers must be to understand the principles of electrical devices, power lines, and power regulations, etc. A hydraulic engineer needs to have What knowledge?

A hydraulic engineer needs to have knowledge of hydraulic working principles, automation control technology, etc.

The following technologies need to be mastered:

Automatic control technology, computer technology, microelectronics technology, friction and wear technology, reliability technology, etc.

Hydraulic pressure is a type of fluid mechanics. Because hydraulic transmission has a small footprint, large transmission torque, and precise control, hydraulics are increasingly used in modern industry. Hydraulic engineers study how to use the advantages of hydraulic transmission to better serve modern production. Not only theoretical knowledge is required, but also practical experience.

With the development of modernization, hydraulic engineers have become the most important positions in the hydraulic industry. Nowadays, machinery, rubber, papermaking and other industries need a large number of hydraulic engineers. There are many senior hydraulic engineers on the Hydraulic Talent Network Hydraulic engineers are professional engineers who specialize in hydraulic power, hydraulic systems, etc. However, our hydraulic engineers are indeed relatively backward compared to foreign technologies. We hope that our hydraulic engineers can communicate more and develop Chinese hydraulic technology. What knowledge do you need to be a mechanical engineer?

A mechanical engineer needs to have a lot of knowledge, such as mechanical principles, mechanical design, mechanical drawing, machining technology, materials science, thermal surface treatment, etc., to be able to be a mechanical engineer. Qualified Engineer. Be specific about what knowledge a network engineer needs to have.

Familiar with Windows system management, establishment and maintenance of corporate networks, Windows network services, databases, Exchange corporate emails and Windows security applications, what knowledge do Linux system CNC maintenance engineers need to have

2009 CNC Engineer Application Requirements Occupational Level: This professional qualification is divided into five levels: CNC Engineer, Senior CNC Engineer, Assistant CNC Engineer, CNC Engineer, and Senior CNC Engineer. Application conditions: (Meet one of the following conditions) 1. CNC engineer: 1. Fresh graduates from technical secondary school, vocational high school or above, or equivalent; 2. Have relevant practical experience... What knowledge do you need to become a mechanical engineer?

Ⅰ.Basic requirements

1. Proficient in engineering drawing standards and representation methods. Master the selection and labeling of tolerance fits.

2. Be familiar with the performance, test methods and selection of commonly used metal materials. Master the heat treatment principles of steel and be familiar with the heat treatment methods and selection of commonly used metal materials. Understand the types and applications of commonly used engineering plastics, special ceramics, optical fibers and nanomaterials.

3. Master the basic knowledge and skills of mechanical product design, and be able to design parts and components proficiently. Be familiar with the design procedures and basic technical elements of mechanical products, be able to use computers to assist in the design of parts, be familiar with practical design methods, and understand modern design methods.

4． Master the basic knowledge and skills of formulating process processes, be able to skillfully formulate processing processes for typical parts, and be able to analyze and solve general process problems that occur on site. Be familiar with the basic technical content, methods and characteristics of mechanical manufacturing processes such as casting, pressure processing, welding, cutting (grinding) processing, special processing, surface coating treatment, assembly, etc. and master certain key points. Familiar with the design knowledge of process plans and process equipment. Understand the principles and knowledge of production line design and workshop layout.

5. Familiarity with safety regulations, ethics and laws relevant to the profession. Familiar with the basics of economics and management. Understand the concepts and applications of management innovation.

6. Be familiar with quality management and quality assurance systems, master the basic tools and methods of process control, and understand relevant quality inspection technologies.

7. Familiar with basic knowledge of computer applications. Familiar with the composition, function and control programming of computer numerical control (CNC) systems. Understand the basic concepts of computer simulation and the characteristics and applications of commonly used computer software.

8. Understand the relevant knowledge of machinery manufacturing automation.

Ⅱ. Exam content

1. Engineering drawing and tolerance coordination

1. General provisions for engineering drawings

(1) Drawing frame

(2) Drawing line

(3) Scale

(4) Title bar

(5) View representation method

(6) Layout of drawings

(7) Section symbols and drawing methods

2. Required drawing methods for parts and components (system) drawings

(1) Required drawing methods for parts and components drawings of mechanical systems (drawing methods for threads and threaded fasteners gears, racks, worms, worm gears and How to draw sprockets, how to draw splines and how to draw springs with dimensions)

(2) Schematic drawing of mechanical, hydraulic, and pneumatic system diagrams (simplified drawing of mechanical parts and components and Symbols: Simplified drawing methods and symbols for pipelines, interfaces and joints Simplified drawing methods and symbols for commonly used hydraulic components)

3. Schematic diagram

(1) How to draw the schematic diagram of the mechanical system

(2) How to draw the schematic diagram of the hydraulic system

(3) Pneumatic system schematic diagram

4. Schematic diagram

5. Dimension, tolerance, fit and geometric tolerance marking

(1) Dimension marking

(2) Tolerance and fit marking (basic concept tolerance and fit marking method)

(3) Geometric tolerance marking

6. Surface quality description and labeling

(1) Evaluation parameters of surface roughness

(2) Surface quality labeling symbols and codes

(3) Surface quality Notes on labeling

7. Dimensional chain

2. Engineering materials

1. Metal materials

(1) Material properties (mechanical performance, physical performance, chemical performance, process performance)

(2) Crystal structure (characteristics of crystals, crystal structure of metal, crystallization of metal, metal in solid state The structure of the transformation alloy under)

(3) Iron-carbon alloy phase diagram (Typical crystallization process of iron-carbon alloy Analysis of the influence of carbon on the equilibrium structure and performance of iron-carbon alloy Application of iron-carbon alloy phase diagram )

(4) Test methods (tensile test, impact test, hardness test, chemical analysis, metallographic analysis, non-destructive testing)

(5) Material selection (use efficiency, process efficiency and economy)

2． Other engineering materials

(1) Engineering plastics (commonly used thermoplastic engineering plastics, commonly used thermosetting engineering plastics, commonly used plastic molding methods, applications of engineering plastics)

(2) Special ceramics (alumina ceramic nitrogen Silicone ceramics, silicon carbide ceramics, boron nitride ceramics, cermets)

(3) Optical fibers (types of applications)

(4) Nanomaterials (types of applications)

< p> 3. Heat treatment

(1) Heat treatment process (heat treatment of steel, heat treatment of cast iron, heat treatment of non-ferrous metals)

(2) Heat treatment device (fuel furnace, resistance furnace, vacuum furnace, induction heating power supply)

(3) Heat treatment applications (shafts, springs, gears, rolling bearings, molds, tools, cast iron, steel castings, non-ferrous metal parts)

3. Product design

1. New product design and development program

(1) Feasibility analysis (market research product positioning feasibility analysis report)

(2) Conceptual design (design requirement functional analysis plan design design task statement) )

(3) Technical design (work content and requirements mechanical structure design calculation instructions)

(4) Design evaluation and decision-making (evaluation objectives, criteria evaluation methods)

2. Basic technical elements of mechanical design

(1) Strength and stiffness

(2) Structural process design (processability design, assembly design, packaging and transportation design principles and key points)< /p>

(3) Reliability (reliability evaluation index reliability design)

(4) Friction/wear/lubrication (friction law, wear law, factors affecting friction and wear, methods to reduce friction and wear)

(5) Mechanical vibration and noise (basic concepts of vibration and noise generated Root causes and hazards, strategies and measures to prevent and reduce vibration and noise)

(6) Safety (principles of safety design, protection design)

(7) Standardization and generalization

3． Design of mechanical parts and components

(1) Mechanical transmission and its parts and components (functional characteristics and design of gears, functional characteristics and design of calculation shafts, functional characteristics and design of screws, functional characteristics and design of belt transmission Calculate the functional characteristics and design of the reducer and select the functional characteristics and design of the speed regulator)

(2) Connections and fasteners (the functional characteristics of bolted connections and the functional characteristics of design keys and the design calculation pins Functional Characteristics and Design Functional Characteristics and Design of Coupling (Functional Characteristics and Design of Calculation Interference Connection)

(3) Operational adjustment and control parts (Functional Characteristics and Design of Spring, Functional Characteristics and Design of Clutch) Functional characteristics of the brake)

(4) Cabinet/Rack Parts (Design Guidelines for Cabinets and Racks General Requirements for Cabinet and Rack Design Design Steps for Cabinets and Racks)

4． Pneumatic and hydraulic transmission control systems

(1) Commonly used pneumatic and hydraulic components (control valves, pumps and motors)

(2) Pneumatic and hydraulic transmission principles and system design (pneumatic system Basic piping design Basic piping design of hydraulic system)

(3) Common fault diagnosis and maintenance

(4) Seal design

5. Basics of electrical transmission

(1) Electric motor (DC motor, non-synchronous motor, synchronous motor)

(2) Electrical speed regulation (speed regulation of DC motor, speed regulation of non-synchronous motor)< /p>

(3) Electric braking (DC motor braking, non-synchronous motor braking)

(4) Selection of motors

6. Design methods and applications

(1) Computer-aided design (conceptual application)

(2) Practical design methods (industrial shape design optimization design ergonomics reverse technology modular design Finite element analysis, rapid prototyping)

(3) Modern design methods (concurrent design, smart design, life cycle design, green design, innovative design)

4. Manufacturing process

1. Process design

(1) Basic concepts of process (production process, machining process, machining process, machining process regulations)

(2) Basis, procedures and main principles of process design Problems (Main issues in process planning design based on process planning design)

(3) Product structure process review (product structure process review object product structure process review purpose product structure The main factors that should be considered during the process review (product structure, process review content)

(4) Selection of positioning benchmark (concept of benchmark, selection of fine benchmark, selection of rough benchmark)

( 5) Process route design (selection of surface processing method, division of processing stages, arrangement of processing sequence, reasonable combination of processes)

(6) Determination of machining allowance (concept of machining allowance, determination of factors affecting machining allowance) Method of machining allowance)

(7) Process size calculation (basic concept of process size chain, basic process size chain solution, comprehensive process size chain chart calculation algorithm)

(8) Technical and economic analysis of process plans (evaluation principles of process plans, analysis and comparison of process plans)

(9) Examples of typical part process design (processing technology of box parts, spindle processing technology, cylindrical gear processing Process)

2. Design and manufacturing of process equipment

(1) Process equipment and its types (types of process equipment)

(2) Basis for selection of process equipment (process plan process Various procedures, process requirements and equipment, existing process and equipment conditions of the enterprise

Standards, ordering manuals, atlases and operating instructions for process equipment, etc.)

(3) Principles for the selection and design of process equipment

(4) Procedures for selecting process equipment

(5) Process equipment design program

(6) Technical and economic evaluation indicators for process equipment design (or selection)

(7) Process equipment verification (process Purpose of equipment verification Scope of verification Main content of verification Method of verification)

3. Workshop graphic design

(1) Workshop production device layout principles

(2) Product type and production analysis (by product (or assembly line, production line) device layout plan by type of work (or Specialized) device layout plan (group (or unit) device layout plan)

(3) Workshop device layout (cluster layout and assembly line layout)

4. Cutting (grinding) processing

(1) Basic knowledge of cutting (grinding) processing (basic concepts metal cutting rate, cutting force, cutting heat and cutting temperature, tool wear and tool durability, cutting processing methods and characteristics, economic processing Accuracy)

(2) Turning (commonly used turning methods, typical turning processing surface types, lathe types and application range, typical turning processing (non-CNC turning methods), new turning technology)

(3) Milling (commonly used milling methods, typical milling processing surface types, milling machine types and application ranges, typical part surface milling and ultra-precision milling)

(4) Grinding (commonly used grinding methods, typical grinding Types of machined surfaces: Main grinder types and scope of application (Typical part surface grinding)

(5) Factors affecting cutting (grinding) quality and improvement measures (factors in the process system, factors in the process) Principle measures to improve the quality of cutting due to environmental factors)

(6) Selection of cutting amount

(7) Tool fixtures for cutting (machine tool fixture cutting tools)

< p> 5． Special machining

(1) Special machining methods and characteristics

(2) Electrical discharge machining (electrical discharge forming machining) The impact of electrical discharge forming machining machine tools on electrical discharge forming Factors and improvement measures for the quality of machining process)

(3) Wire-cutting EDM (Characteristics of wire-cutting EDM, process of wire-cutting EDM, main process of wire-cutting EDM processing device) Factors and analysis of quality indicators affecting process economy)

(4) Laser processing (laser processing principles, characteristics and classifications of laser processing devices, laser drilling and laser cutting)

(5) Ultrasonic processing (principles and characteristics of ultrasonic processing, ultrasonic processing equipment, ultrasonic processing technology parameters and its influencing factors, application of ultrasonic processing)

6. Casting

(1) Casting and its characteristics (Basic Casting Process Design Casting Process File)

(2) Sand Casting (Shaping Material Casting Iron Casting Casting Steel Casting Casting Copper, Aluminum alloy castings casting)

(3) Metal mold casting (copper alloy castings aluminum alloy castings)

(4) Die casting (structural die casting alloy die casting machine for die castings)

(5) Investment casting (the structure of investment casting, the characteristics and application of investment casting process parameters and model shells)

(6) Casting process equipment (pattern template, core box, sand box)

7. Pressure processing

(1) Pressure processing and its classification (the meaning and characteristics of pressure processing, classification and application of pressure processing)

(2) Forging (free forging and die forging)

(3) Stamping (characteristics of stamping processing, classification of stamping process, application requirements of stamping process)

(4) Factors affecting the quality of forging processing and measures to improve it

(5) Process equipment for pressure processing (stamping die design, hot forging die design, tire mold structure design, rapid and economical molding technology)

8. Welding

(1) Welding methods and characteristics (basics of fusion welding process, arc welding power source and its characteristics, welding process)

(2) Arc welding (hand arc welding and its equipment, submerged arc welding)

(3) Argon arc welding

(4) Gas welding (gas welding and gas cutting devices use gas welding process parameters) Selection of gas welding process parameters)

(5) Welding process equipment (welding fixtures, welding auxiliary processing devices, welding manipulators)

9. Surface treatment

(1) Characteristics and classification of surface treatment (surface treatment characteristics, surface engineering technology classification)

(2) Coating technology (coating materials, coating technology and equipment coating Evaluation of the coating film quality of typical products of film drying)

(3) Thermal spray technology (commonly used thermal spray process classification and thermal spray technology characteristics) Thermal spray process flow Thermal spray process method Thermal spray material Thermal spray technology Quality assessment of applied thermal spray coatings)

(4) Electroplating (implementation of electroplating, process of electroplating, factors affecting coating quality, type of electroplating and quality evaluation of applied electroplating)

10. Assembly

(1) Basic knowledge (assembly, sub-assembly, final assembly assembly unit, reference parts and reference components, reference component assembly accuracy and the main factors affecting assembly quality)

(2) Assembly dimension chain and assembly method (assembly dimension chain assembly method)

(3) Assembly method types and their selection (complete interchange assembly method, partial interchange assembly method (also known as large interchange assembly method) ) Select the assembly method, modify the assembly method, adjust the assembly method)

(4) Typical component assembly (rolling bearing component assembly, cylindrical gear transmission component assembly)

5. Management/Economy

1. Safety/environmental protection

(1) Device maintenance and safe operation (maintenance and safety of devices, safety technology of safety robots for processing and lifting machinery, CNC machine tools and automatic production lines)

(2) Common labor safety and health precautions (fire prevention, explosion protection, electric shock prevention, static electricity prevention and noise prevention)

(3) Environmental protection (industrial waste gas, waste water, solid waste and their treatment technology Environmental laws, regulations and standards Clean production ISO 14000 environmental management series standards introduction)

2. Professional-related moral and legal knowledge

(1) Basic moral standards for citizens

(2) Main contents of citizen moral construction

(3) Mechanical engineers Code of Professional Ethics

(4) Financial and tax system (basic accounting system, three financial tables, tax types, tax rates)

(5) Intellectual Property Law (Basic Knowledge Patent Law, Trademark Law, Copyright Law Anti-Unfair Competition Law)

(6) Laws related to modern enterprise systems (Company Law, Contract Law, Tendering Law, Production Licensing System)

(7) WTO rules and government industrial policies ( History and my country’s commitments; Basic principles of WTO; Four major purposes of WTO; Countervailing and anti-dumping; Impact of joining WTO on Chinese society)

3. Engineering Economics

(1) Basic concepts of economics (demand supply supply and demand balance market market economy command economy and mixed economy)

(2) Cost analysis (classified amounts of costs - The relationship between costs and profits - cost-profit analysis)

(3) Value engineering (the basic concept of value engineering, the basic program of implementing value engineering, product function analysis, product function evaluation, proposing improvement ideas, analysis and evaluation plan Test, inspect, evaluate effects)

4. Management

(1) Basic functions of management (the importance of management and the basic functions of work nature management)

(2) Modern enterprise system (separation of two rights of enterprise ownership, enterprise property organization Form corporate governance structure)

(3) Productivity analysis and improvement (productivity method research time study proficiency curve)

(4) Logistics foundation (basic concepts of logistics and its system manufacturing enterprises Characteristics of commonly used material handling devices in logistics systems and selection of supply chain and supply chain management)

(5) On-site management (5S activity placement management)

5． Management Innovation

(1) Changes in manufacturing models and advanced manufacturing models (manufacturing models start from mass production to group technology, CNC technology and unit manufacturing - solutions to multi-variety batch production to contemporary advanced manufacturing Mode)

(2) MRP/MRPⅡ/ERP (MRP MRPⅡ ERP)

(3) Lean production (just-in-time (JIT) production Kanban management)

(4) Project management (project and project management concepts, the three elements of project management and the process and content of target project management)

(5) Agile manufacturing (the background of the agile manufacturing strategy) Basic Concepts Enterprise Agility Cases)

6. Quality Management/Quality Control

1. Quality Management/Quality Assurance

(1) Quality/Product Quality (Quality defines product quality and quality characteristics, the formation of product quality and quality functions and responsibilities)

(2) Quality Management and Total quality management (the meaning of quality management, the development of quality management, the characteristics of total quality management, the basic work of total quality management)

(3) ISO 9000 family of standards and quality systems (the emergence and development of the ISO 9000 family of standards The composition and content of the ISO 9000 family of standards, quality assurance and quality system establishment)

(4) Quality certification (type of quality certification, product quality certification, quality system certification)

2. Process quality control

(1) Quality control concept

(2) Basic tools for process quality control (statistical analysis table, Pareto chart, cause-and-effect diagram)

(3 )Statistical process control tools (histogram process capability and process capability index Cp control chart)

(4) Correlation analysis (correlation plot (scatter plot) method regression equation method correlation analysis in quality control )

3. Measurement and Inspection

(1) Measurement and Inspection in Product Manufacturing

(2) Geometric Quantity Measurement (Measuring Reference Instruments for Length Measurement Angle Measuring Instruments Shape Measuring Instruments)

(3) Mechanical quantity measurement (measurement of force and weight, measurement of torque, displacement measurement, rotational speed measurement, vibration measurement)

(4) Measurement of other physical quantities (temperature measurement, pressure measurement, noise measurement)

7. Computer Application

1. Basic knowledge of computer applications

(1) The composition and types of microcomputers

(2) The structural performance characteristics of commonly used microcomputers (the structural performance characteristics of sixteen-bit microcomputers (8086/8088CPU) Structural performance characteristics of eight-bit microcomputer (Z80CPU) Structural performance characteristics of microcontroller I/O interface and memory expansion kit Programmable Logic Controller (PLC))

(3) Microcomputer software and hardware Principles of body selection

2. Computer simulation

(1) Basic concepts of simulation

(2) Development and significance of computer simulation

(3) General process of computer simulation

(4) Application of simulation in CAD/CAPP/CAM system

3. Computer Numerical Control (CNC)

(1) Basics of CNC control programming (content and steps of CNC machining programming, common program format and typical program code)

(2) CNC Programming methods (manual engineering design and automatic programming, manual engineering design examples, programming language methods, automatic programming process and APT programming simple examples, ordinary programming format)

(3) Linear interpolation and arc interpolation

4. CAD/CAPP/CAM/CAE

(1) Basic concepts of CAD/CAPP/CAM

(2) Basic functions and workflow of CAD/CAPP/CAM

(3) Computer-aided design (CAD)

(4) Computer-aided process design (CAPP)

(5) Computer

Aided manufacturing (CAM)

(6) Application status of CAD/CAPP/CAM

(7) Computer Aided Engineering-CAE (Computer Aided Engineering-CAE)

8. Machinery manufacturing automation

1. Development of machinery manufacturing automation and its technical content classification

2. Processing operation automation (device automation)

(1) Rigid automated processing device (ordinary automated machine tool combined machine tool rigid automatic line)

(2) Flexible automated processing device (CNC machine tool machining center )

3. Logistics automation

(1) Logistics concepts and functions

(2) Classification of logistics automation devices (loading and unloading/loading and unloading automation devices, transmission/transportation automation devices, storage automation devices)

4. Information flow automation

(1) Information meaning and information flow/information system

(2) Information source

(3) Information collection/input

(4) Information processing

(5) Information transmission and exchange

(6) Information storage

5. Management automation

(1) Management meaning and its automation basis

(2) MRP-II

6. Common flexible automation systems for mechanical manufacturing

(1) DNC system