1 development platform programming tools and operating environment In order to meet the requirements of adapting to various operating environments and the development of software systems occupying less computer resources, the development platform of this system is the Xian 1 plus 66 and 8 Xian 883 under the 10th 598. They have the advantages of rapid development and flexibility, and facilitate the development of the entire software system and the integration of various sub-modules in the system.
Milk provides a variety of browser-side scripting and execution instructions for dynamic, file, and general purpose browsers. Through the built-in Jia 5, it is very convenient to drive the background processing program for data processing, through the constant refresh of this page, to get the latest intermediate results, and return the final result to the user's browser. People 3 supports script commands. Component 13 applet flashing text and so on embedded in 1 page, can create interactive Jia and dynamic running based Jia 61 application.
As an auxiliary tool, Deamweave is also used in this system, which can realize web page visual design and debugging of client-side script.
The debugging and running environment of the system is PesonalWebServer abbreviation 15, which makes the personal computer have the function of evaluating the server.
2 Overall scheme design and implementation Under the guidance of the theory and method of software engineering, the system uses the functional analysis method to design the overall scheme. Workflow of the background processing program of the network workflow 1 optimization module 2 main web pages and functions are as follows.
Page name main function background processing program database parameter input page in the middle of the page page results display page and the result output page number 裾痄, æ´µ æ´µ 齿轮 齿轮 齿轮 粘 粘 æ³æ´µ æ³æ´µ æ³æ´µ æ³æ´µ æ³æ´µ æ³æ´µ 功能 功能 功能 功能 功能 功能 功能 功能 功能 功能 功能 功能 功能 功能The optimal design method adopted by the design module system is a feasible enumeration method. The basic idea is to list all possible combinations of design variables, calculate the combination that satisfies all constraints and its objective function values, and finally obtain the design variable combination of the optimal solution. The system will compare the results of multiple optimizations and obtain better values ​​as optimization results.
The system is used to solve the two major problems in the design of the reducer. It is mainly used to design the special reducer; the latter is mainly used for the existing reducer wheel drive parallel shaft spur gear transmission arc bevel gear + parallel shaft drive 2 planetary gear drive.
in! On the 1st, the system is designed and optimized on the server, and the results are returned to the foreground. Through the automatic refreshing of web pages, users can get the latest optimization results.
In the gear optimization design of the precision retrieval module, the gear precision database needs to be used repeatedly. All the precision retrieval of the system uses the method of directly accessing the database by person 00. It not only meets the requirements of software engineering, but also significantly reduces the size of web files. The accuracy retrieval module can also be used separately.
The help of the help module system is divided into real-time help and centralized help. It also provides functions such as subject search and keyword association. This module is used for parameter input and result evaluation, thus providing expert consultation on the design and manufacture of gears.
The gear strength check module can be used for detailed accounting of optimized design results and can be used in a variety of complex situations. Provides more detailed interface input and detailed result output, with real-time help and centralized help.
4 Back-end management of users and public files On the network, user management is very important. The system takes some special methods for user management, such as 8685.
36,0 as the user logo, the user's input and output results are all in the same directory, etc. These methods have achieved some effects, and now it is specified that the user directory is established at the time of the user directory establishment time is after the user submits the data. The system starts to establish the user's 8633, 1.5655, the location of the user directory where the user's files are placed in their own folders, and the folders are placed in the mandatory directory, which is convenient for server-side management.
Network administrators can use the USer folder to maintain user data, and quickly understand user usage and software usage.
Automatic deletion of expired user directories When a user's directory exists for more than the time set by the system, the system will automatically delete it, which can avoid a large number of user files staying on the server and causing some potential problems of the server.
The deletion is on the server side, the 1.353 file is used in this article. The event triggers the delete event. When a user logs in, it starts to detect whether there is an expired folder. If it expires, it is cleared.
The existence and expiration of public documents. For some public files, the system uses it as a public input file. For public files, it must be deleted after use, and only a few users are allowed to operate during the period. When the file exists, the remaining users are not allowed to operate. When the file is significantly longer, other users will force it to be deleted so that other users can continue to use it.
Limits on the number of users Due to the optimization of calculations and design checks, the load on the server is heavier. If multiple users perform optimization calculations or checks at the same time, the server may be overwhelmed and crash. Therefore, the system allows up to 10 users to perform optimization calculations or checks. If there are more than 10 users, the system will automatically let the user wait until the number of users is less than 10 and then continue to calculate automatically.
5 software development key technology research and implementation of the front-end data check program to determine the number of user input, if it does not meet the conditions, the backup data is triggered when the text box gets the focus, the implementation of the input data receiving backup system first accepts the user data , write the data as a data file, and then use the file object to store it in the user's own folder as a backup.
The driver spooler spooler uses a 15-way 3 method to drive the direct-drive spooler to continuously display intermediate results. The user's folder file is continuously read through the web page, and the user can get the latest results. The continuous reading of the files in the folder is obtained through the automatic refreshing of the webpage, and the automatic reading of the code for the folder is the development of the dynamic design software of the scraper conveyor Wei Xiaohua, Mao Jun Liaoning University of Engineering and Technology, Fuxin 1230001, Liaoning, China Introduction Compared with domestic, foreign advanced scraper conveyor factories constantly develop new technologies and develop new models in order to compete in the market. Although they have not made breakthroughs in major technologies, they have made great progress in structural electronic control testing and reliability. However, in general, at home and abroad, the transmission system of the scraper conveyor as a system to study its dynamic characteristics is rare. This software is developed on this basis.
2 software design ideas Analysis of the characteristics of the scraper conveyor scraper chain and the operating characteristics of the coal in the chute, the establishment of the dynamic model of the scraper chain.
The result can be achieved by clicking on a hyperlink with parameters.
The data received by parameter 3 is slightly different. The specific format is 1681=foot 6ye 631.9. This 1751 system can read this parameter, then use this parameter to read the specified file and read the file content. In the variables, this article outputs the contents of the variable as the content of a text field. This implements a preview of the specified result. The key code is executed, and the end of the file operation object analyzes the influence of the unstable operation of the conveyor, and establishes the differential equation of the scraper chain motion. Determine the displacement velocity acceleration and stress of the scraper chain at different points at different times.
It is necessary to analyze the large-scale scraper conveyor using discrete model and apply computer simulation. The discrete dynamic model of the system is established by the scraper chain of the selected conveyor for digital simulation and shape rendering.
The dynamic simulation of several starting methods of large scraper conveyors and braking at different points is carried out to analyze the influence of starting brake on the tension of the conveyor chain of the conveyor, so as to optimize the starting of the scraper conveyor.
Use the following code in the web page to display the content of the 134,0 involute cylindrical gear bearing capacity calculation method. Beijing 3 Standard Press, 1997.
Sun Yuanxiao, and so on. Cylindrical gear reducer optimized design North Machinery, the industry published a progressive one-wheel planetary transmission design and manufacturing editorial board. The design and manufacture of involute gears is versatile. Beijing Mechanical Industry Press, 1988.
Gear Handbook Editorial Board. The first edition of the gear manual. Beijing Machinery Industry Publishing Wang Guorong. Six 656 technology 808 database 刖. Beijing People's Posts and Telecommunications published Liu Xiaodong. DeamweaverUhraDev's Web Development Guide M. Beijing Hua University Press, 2002.
Director of the teaching and research section, associate professor, graduated from the Taiyuan Heavy Machinery Institute in 1982. He graduated from the Northeast Institute of Technology in 1988 and went to Germany for technical training in 997. Since 1982, he has been engaged in the design and research of New Products and management of heavy-duty gear transmission. Now he is mainly engaged in the design of wheel fault diagnosis gears, 40, and teaching and research related to industrial engineering. Dozens of papers.
Coupling for High Pressure Cleaning Machine with Brass, Stainless Steel, Iron material. Fittings include welding, card sets and flared,
Male Coupling Connector Type:
End through connector, straight connectors, tees, elbows, with live nut joints, Swivel joints, plug, transition joints
Composed of dual ferrule fittings: Before the snap ring, after the snap ring nut
Materials commonly used are stainless steel and carbon steel
NPT, PT, G is the pipe thread.
NPT is National (American) Pipe Thread abbreviation belong American standard tapered pipe thread 60 degree, for North America. National standards can be found GB / T12716-1991
Pipe Thread PT is an abbreviation, is 55 degrees sealing cone pipe thread, is a Whitworth thread family, more for Europe and the Commonwealth countries. Commonly used in water and gas pipe industry, defined as 1:16 taper. National standards can be found GB / T7306-2000
G is 55 degrees non-thread sealing pipe thread, is a Whitworth thread family. G represents a threaded barrel mark. National standards can be found GB / T7307-2001
Also thread 1 / 4,1 / 2,1 / 8 mark refers to the thread diameter in inches.
Insiders usually points to refer to the thread size, one inch equals 8 points, 1/4-inch is 2 points, and so on.
G is the pipe thread collectively (Guan), divided into 55, 60 degrees are functional, commonly known as a round tube. That thread processing is made by a cylindrical surface.
ZG commonly known as the funnel, that thread processing by a conical surface made of pipe joints in general are like this, the old domestic thread standard male thread Rc labeled as R
Male Coupling,Brass Male Fitting,45 Degree Brass Couplers,Stainless Steel Coupling
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