What is called U shaped pipe and blind pipe in connecting water pipes?

U-shaped tube is a commonly used instrument in chemical experiments, generally U-shaped transparent glass tube or plastic tube, there are various sizes and models, can hold liquids or solids. The U-tube can be used in a variety of chemical experiments, for example, solid desiccants such as soda lime and anhydrous calcium chloride can be loaded in the U-tube for drying gases, and in some experiments, the U-tube can also be placed in ice brine for condensing liquefied gases, and the change in gas volume can also be measured.

Drainage blind pipe, also known as drainage blind ditch, is mainly made of synthetic fiber, plastic and synthetic rubber as raw materials, and is made of various types and multi-functional geotechnical products through different process methods. Its material is hydrophobic, has low resistance, and has extremely high surface water permeability and internal water flow capacity; And has excellent compressive ability and the ability to adapt to deformation; It has excellent chemical inertness and can maintain a long life in geotechnical applications; Light weight, easy to cut, easy to construct and install. The main function of the application field is to collect water seepage in the drainage soil to reduce groundwater pressure, remove excess water, and protect the soil and buildings from damage due to seepage deformation.

It is widely used in underground collection and drainage projects of civil engineering, transportation, water conservancy, industrial and civil construction, miners, environmental protection and other construction projects.

One end is the blind tube, and the two ends are the U-shaped tube.

Network operating system: An operating system that provides services to network computers.

The network operation system (NOS) is the heart and soul of the network, and it is a special operating system that can control and manage network resources. Inside it is the same as in general.

The difference between the computer operating system is that it works under the computer operating system, which makes the computer operating system increase the capacity required for network operations.

Network operating system mainly refers to the operating system running on various servers, currently mainly including UNIX, Linux, Windows and Netware systems. Each operating system has its own strengths in terms of network applications, but the actual applications are very different, which has led to a strong effort to provide cross-platform application support.

In general, NOS is designed to optimize network-related features, such as sharing data files, software applications, and sharing hard drives, printers, modems, scanners, and fax machines. The general PC operating system, such as Mac OS X, OS 2, and Windows 9X XP, is designed to allow the user to interact optimally with the system and the various applications running on this operating system.

The network operating system transmits data and various messages to each other through the network, which is divided into server and client. The main function of the server is to manage the sharing of various resources and network devices between the server and the network, and to unify and control the traffic to avoid the possibility of paralysis.

In addition to realizing all the functions of the stand-alone operating system, it also has the functions of managing shared resources in the network, realizing user communication and facilitating users to use the network, which is the heart and soul of the network.

Network operating systems differ from single-user operating systems (e.g., Windows 98, etc.) or multi-user operating systems running on workstations depending on the type of services provided. In general, the purpose of a network operating system is to make the best possible network-related features. Such as sharing data files, software applications, and sharing hard drives, printers, modems, scanners, and fax machines.

The purpose of the operating system of a computer in general, such as DOS and OS 2, is to allow the user to interact optimally with the system and the various applications running on this operating system.

For the network BAI operating system.

For the management of DU network servers, the special point is high security, DAO professionalism such as win2003, win2008 large server dedicated unix;

The personal operation system is to serve the daily life of individuals, with the characteristics of high efficiency and lightness, and easy to use Example winxp win7;

Both a network operating system and a personal operating system belong to operating systems;

I believe LZ is using a personal operating system.

To add:LS said that the former must start the network,No,It's just tailored for network management,You can still use win03 08 as XP 7 if you don't connect to the network,But that's overkill.。

The difference is simple, personal.

Copy the operating system in.

Attack your own computer hard drive, network operating system in other people's computer zha hard drive. The personal DAO operating system can be started without the network, and the network operating system must be enabled to connect to the network. Many Internet cafes do not have hard disks, and they need to be started to read the network operating system from a single computer.

Personal operating systems are for home and individual customers. It is used for office, work and entertainment, among others. The network operating system is generally installed in the server to provide some network services such as:

Web services, FTP services, shared data files, software applications, and shared hard drives, printers, modems, scanners, fax machines, etc.

It's not a professional question... See what special requests you have...

1. Windows series:

A set of operating systems developed by Microsoft in the United States, which came out in 1985, was only a Microsoft-DOS simulation environment at first, and the subsequent system versions are not only easy to use due to Microsoft's continuous updates and upgrades, but also slowly become the choice of many users.

2、linux：

This is a new type of network operating system, and its biggest feature is that the source is open, and many applications can be obtained for free. At present, there are also Chinese versions of Linux, such as Redhat (Red Hat), Hongqi Linux, etc.

It has been fully affirmed by users in China, mainly in terms of its security and stability, and it has many similarities with UNIX. However, at present, this type of operating system is still mainly used in medium and high-end servers.

3、unix：

At present, the commonly used UNIX system versions mainly include: UNIX, SUN, etc. It supports network file system services, provides data and other applications, and is powerful and is launched by AT&T and SCO companies.

This network operating system is very stable and secure, but because it is mostly operated in the form of commands, it is not easy to master, especially for beginner users.

The operating system (OS) is the management of all the hardware resources of a computer system, including software resources and data resources. control program operation; improve the human-machine interface; Provide support for other application software, etc., so that all the resources of the computer system can be used to the maximum extent, and provide users with a convenient, effective and friendly service interface.

The operating system is usually the layer of system software closest to the hardware, which transforms the hardware bare metal into a fully functional virtual machine, making the use and management of the computer system more convenient, the utilization of computer resources is more efficient, and the upper-layer applications can get more support than the functions provided by the hardware.

The operating system is a huge management and control program, which roughly includes five management functions: process and processor management, job management, storage management, device management, and file management. At present, the common operating systems on microcomputers are DOS, OS 2, UNIX, Xenix, Linux, Windows 2000, NetWare, etc.

Computer resources can be divided into two main categories: hardware resources and software resources. Hardware resources refer to the hardware equipment that makes up a computer, such as processors, main storage, tape storage, printers, monitors, keyboard input devices, etc.

Software resources mainly refer to various data and programs stored in a computer. The hardware and software resources of the system are allocated and scheduled by the operating system according to certain policies according to user needs.

The processor management of the operating system alternately assigns processors to programs within the system that are waiting to run according to a certain policy.

The device management of the operating system is responsible for assigning and ** external devices, as well as controlling the operation of external devices as required by the user program.

The file management of the operating system provides users with the ability to create files, undo files, read and write files, open and close files, and so on.

The storage management function of the operating system is to manage memory resources. It mainly realizes memory allocation and storage, storage protection and memory expansion.

The job management function of the operating system is to provide users with a good environment to use the system, so that users can effectively organize their own workflows and make the whole system run efficiently.

Common operating systems are: Win98 WinMe Win2000 WinNT Win2003 There are multiple versions of Win200. The most common ones are the previous ones.

There's also DOS, and there's the Linux operating system. This is a network operating system. There is also windowsce, which are generally not commonly used.

Windows class.

Anyone who has ever used a computer is no stranger to this type of operating system, which is developed by the world's largest software developer, Microsoft (Microsoft). Microsoft's Windows system not only has an absolute advantage in personal operating systems, but it also has a very strong power in network operating systems. This type of operating system configuration is the most common in the entire LAN configuration, but because it has high hardware requirements for the server and the stability performance is not very high, Microsoft's network operating system is generally only used in low-end servers, and high-end servers usually use non-Windows operating systems such as Unix, Linux or Solairs.

In the local area network, Microsoft's network operating systems mainly include: Windows NT Serve, Windows 2000 Server Advance Server, and the latest Windows 2003 Server Advance Server, etc., and the workstation system can use any Windows or non-Windows operating system, including personal operating systems, such as Windows 9X Me XP, etc.

The difference between the two is that they provide different services, with the network operating system (NOS) focusing on optimizing the characteristics related to network activity, i.e., managing resources such as software applications such as shared data files over the network, while the OS focuses on optimizing the interface between the user and the system and the applications running on it.

The operating system is based on the BIOS, a set of software used to run the application software, it mobilizes the functions of the hardware, translates the application software to run, and other software gives orders to the computer through it.

Network operating system generally refers to the network type of operating system, such as Unix, Nevoll, WindowsNT, Windows2000, Windows2003, etc., which requires more stability and security, so the function of entertainment is weakened. It's just that more people use Microsoft's window operating system, and the usual operating system focuses on multi-** and multi-functional, and then after adding networking support, it may make people confused, because Microsoft always wants to integrate the operating system more perfectly, but at the same time, it also comes out of the server-oriented network operating system. The two have different target orientations.

1. Windows series: a set of operating systems developed by Microsoft in the United States, it came out in 1985, at first it was only a Microsoft-DOS simulation environment, and the subsequent system versions are not only easy to use due to Microsoft's continuous updates and upgrades, but also slowly become the choice of many users. The system version is continuously updated from the original Windows to the well-known Windows 95, Windows 98, Windows ME, Windows 2000, Windows 2003, Windows XP, Windows Vista, Windows 7, Windows 8, Windows 10 and Windows Server server enterprise operating systems. Microsoft has been working on the development and improvement of the Windows operating system.

2. UNIX: It is a powerful multi-user, multi-task operating system, supporting a variety of processor architectures, according to the classification of operating systems, it belongs to the time-sharing operating system.

3. Linux: Linux is a set of free-to-use and freely disseminated UNIX-like operating system, which is a multi-user, multi-tasking, multi-threading and multi-CPU operating system based on POSIX and UNIX. It runs major Unix tools, applications, and network protocols.

It supports both 32-bit and 64-bit hardware. Linux inherits UNIX's network-centric design philosophy and is a multi-user network operating system with stable performance.

4. NetWare: The most important feature of NetWare is the open system structure based on the basic module design idea. NetWare is an open web server platform that can be easily extended.

NetWare systems work on different platforms (e.g. DOS, OS 2, Macintosh, etc.).