2. Regarding conductivity, there is a concept of "conductivity" to measure conductivity. This leads to two extreme "superconductors" and "insulators". Superconductors can be understood as objects with almost no resistance and no voltage drop, but with harsh conditions. Insulators can be understood as completely nonconductive, but in fact insulators also have the problem of "leakage current". In other words, there are no absolute conductors and insulators, only relative ones.
3, the conductor becomes an insulator, leaving aside the theoretical test in the laboratory, if the kind of mixed materials is to be insulated, or "theoretical insulation", it is generally "plus insulation".
4, insulation layer, in general, can be divided into four layers. For example, the outermost layer of a conductor, that is, the basic insulation, the first layer. Then several wires are combined to wrap a layer, which is to strengthen insulation and the second layer. Then find a plastic box to put everything together. This is the third floor. For general civil use, it is enough to make three floors. Typical, such as "desk lamp", you can look at the "back" icon on the desk lamp. It is a three-layer insulation protection. Industrially, fences, protective walls and baffles are put on the periphery of the conductor area, that is, the fourth floor.
Good luck,
What are the conditions for compiling mex files? You should be able to compile and run MEX using the L compiler included with matlab.
But it seems that it needs to be configured first.
What are the requirements for learning flight attendants? The requirements of junior stewardess are: unmarried, healthy, good-looking, good eyesight, height not less than 1.60m, loose age: 20 to 26 years old, college degree or above, able to speak standard Mandarin and English. Domestic flight attendants have always been known for their high entry standards. In addition to knowing at least one foreign language, you must also have your own height (164 cm to 172 cm), weight (kilograms after your own height minus 105), age (generally required to be around 23 years old), appearance, temperament and education level (college or above in regular colleges). Airline requirements for flight attendants registration: Regular facial features, handsome appearance and well-proportioned figure. Female height 164- 173cm, male height 173- 183cm. Articulate, standard Mandarin. There are no obvious scars on his body. There is no bad breath, bad breath, skin disease, internal and external personality when walking. Hearing is not less than 5 meters. No history of mental illness or chronic diseases. Education requirements are average, but some airlines don't. Fluent English or basic conversation skills are required, and other small languages are preferred.
What are the requirements for suing for divorce? Hello, sue for divorce. If there is enough evidence to prove that the marriage relationship has broken down, the general court will decide to divorce.
What conditions do economists need to meet?
1, must have a high school education or above. 2. For fresh graduates who have not yet obtained academic certificates, they must have valid certificates (such as student ID cards) that can prove that they can graduate in the examination year and the fresh graduation certificate issued by the school.
Those who sign up for the intermediate qualification examination for economic majors must also meet one of the following conditions:
1. After graduation, the secondary specialized school has been engaged in professional work for a total of 10 years, and obtained the primary qualification of economic specialty (including the qualification of economic engineer obtained through the national examination before the end of 1992 or the primary professional position of economic specialty evaluated and hired according to the unified national regulations before June 6, 1993).
2. Engaged in professional work for 6 years after graduating from university;
3. Engaged in professional work for 4 years after graduating from university.
4, after obtaining the second bachelor's degree or graduate class, engaged in the professional work for 2 years.
5. Engaged in professional work after obtaining a master's degree 1 year;
6. Get a doctorate.
What are the conditions for patent authorization? Patent authorization conditions (invention, utility model, design)
I. Conditions for granting a patent for utility model
1.？ According to the provisions of the Patent Law, inventions and utility models that are granted patent rights must be novel, creative and practical, that is, the so-called "three characteristics" of patents. This is a norm generally adopted by patent laws in various countries, and it is also a norm confirmed by the Agreement on Trade-related Aspects of Intellectual Property Rights (TRIPS) of the World Trade Organization.
Second, the conditions for granting the patent right for appearance
1.？ The design should be novel.
2.？ Design should be creative.
3.？ It shall not conflict with the legal rights previously obtained by others.
Three. Conditions for granting invention patents
1. According to the provisions of Article 22 of this Law on the novelty of inventions and utility models, it is a basic principle that an invention for which a patent is applied will lose its novelty and cannot be patented if it has been made public before the filing date. But this basic principle is not absolute, and there are exceptions. The patent laws of many countries stipulate that inventions can be made public without losing novelty within a certain period before the filing date, that is, the so-called publicity without losing novelty. This article is the disclosure of not losing novelty in China's patent law.
2. The publication period without loss of novelty is within six months before the application date. This period is also called grace period, that is, within six months before the date of application, if the circumstances stipulated in this law occur, the application will not lose its novelty. If you file a patent application after this time limit, it will no longer be novel and should not be granted a patent right.
Three, do not lose novelty, the provisions of this article have three points:
1. was exhibited for the first time in an international exhibition hosted or recognized by China * * *. Including two meanings: First, it must be an international exhibition hosted or recognized by China. Second, it must be an international exhibition, that is, in addition to the products of the host country, there should also be foreign exhibits.
2. First published at a specific academic conference or technical conference. Don't lose the freshness.
3. Other contents are disclosed without the consent of the applicant.
If you want to take the FRM exam, what conditions do you need to meet before you can sign up? FRM is quite relaxed, and there are no restrictions on the qualifications of candidates and the industries in which FRM is engaged.
Determine what conditions suicide needs to meet, the cause of death completely excludes external factors and disease factors, and there are suicidal motives and suicide means.
What are the requirements for joining Sanfu? What conditions need to be met for the college entrance examination in different places? Different regions have different regulations. Take Shandong as an example:
Non-registered candidates must meet several conditions in taking the college entrance examination in Shandong. First, they must be children of migrant workers, second, they must have a high school status in Shandong Province, and third, they must be qualified graduates with complete learning experience.