What does PM mean?

I. Abbreviations in English

Afternoon (morning: morning)

Product market.

Project management.

Project manager.

product manager

Original member

Planned maintenance Planned maintenance

In modern factories, people are often responsible for planning and maintaining equipment systems.

Daily maintenance

Private letter means to send me a message (often used in forums).

PageMaker typesetting software

Polymethyl methacrylate

Power management power management

Princess maker parenting game-DreamWorks, a beautiful girl.

Partition magic partition wizard

PartitionMagic of PowerQuest is an excellent hard disk partition management tool. This tool can repartition, format partitions, copy partitions, move partitions, hide/copy partitions, boot the system from any partition, and convert partitions (such as fat)

property management

Prime minister; initial

Pacific Mail Pacific Mail Company [USA];

Passivate mesa (transistor) Passivate mesa transistor;

Former president and former host of Master of the Past;

Quartermaster, cashier;

Regular maintenance Regular maintenance;

Permanent magnet permanent magnet;

Phase modulation phase modulation;

Photomultiplier tube;

Auxiliary [servo] motor;

Factory management;

Flat panel modulation screen modulation;

A court judge in charge of public security crimes;

Postmaster;

Powder metallurgy powder metallurgy;

Preventive maintenance;

Program manual;

impulse modulation

Pokemon Pokemon

A well-known game developed by Nintendo in Japan, the sales of this series of works exceeded 654.38 billion copies.

phase margin

In industrial control systems, PM usually stands for phase margin, which is an index to describe the relative stability of the control system.

The phase angle margin shows that for a closed-loop stable system, if the open-loop phase-frequency characteristic lags behind by several degrees, the system will become critically stable.

Every minute, every minute.

Can be combined with adjectives of any action to form an abbreviation of XX per minute, such as APM (effective operands per minute).

Picometer picometer is a unit of length, and 1 picometer is equivalent to one trillionth of 1 meter. Sometimes it is called a micron in atomic physics.

transformational relation

0.00 1 nm = 1 picometer

0.000 00 1 micron (? M) = 1 picometer

0.000 000 00 1 mm = 1 picometer.

1 000 picometer = 1 nanometer (nanometer)

1 000 000 picometers = 1 micron (? m)

1 000 000 000 picometers = 1 mm (mm)

Second, the pinyin abbreviation:

Pinyin abbreviation for flattery/auction/despair/cloth, etc.

Third, the elements.

Element symbol: Pm English name: Prometheum Chinese name: Prometheum

Volume elastic modulus: GPa

Estimated 33

Atomization enthalpy: kJ /mol @25℃

3 10

Thermal conductivity: w/(m k)

17.9

Relative atomic mass: 144.9 13 Ordinary valence: +3 Electronegativity: 1. 13.

Peripheral electron configuration: 4f5 6s2 Extranuclear electron configuration: 2,8,18,23,8,2.

Isotope and radiation: pm-143 [265y] pm-144 [360y] pm-145 [17.7y] pm-146 [5.53y]. Pm- 148m[4 1.3d]Pm- 149[2.2 1d]Pm- 15 1[ 1. 18d]

Electron affinity energy and energy: 0 kj mol-1.

The first ionization energy is 535kJ mol- 1, the second ionization energy is 1052kJ mol- 1, and the third ionization energy is 0kJ mol- 1.

Element density: 6.475 g/cm3 Element melting point: 1042.0℃ Element boiling point: 3000.0℃

Atomic radius: 2.62 angstrom ion radius: 1.09(+3) angstrom valence radius: 1.63 angstrom.

Common compounds: unknown

Discoverer: mullins, Kiglan Downing, Corell Time: 1945 Location: USA.

Name source:

Named after Prometheus in Greek mythology.

Element description:

Originally produced in stars, promethium on the earth has many origins.

Element source:

It does not exist in nature, but is produced in the fission products of uranium, thorium and plutonium.

Element usage:

Used as a ray source for thickness gauge.

As a unit of length,

Pimi PM = ( 10) (- 12) m

For example, in methane molecules, the bond lengths of four carbon-hydrogen bonds are all 109.3pm.

PM means a lot. The specific meaning depends on the specific environment.

1. PM in the forum is generally the abbreviation of private message, which means short message in the station.

2. Short for flattery.

3.PM is the abbreviation of polymethyl methacrylate, whose Chinese name is polymethyl methacrylate.

4. Abbreviation for auction.

On the Internet, PM = private letter = means to send you a message.

The full name of PM is Pentium-M, which is a CPU specially developed for notebooks.

5.PM is the abbreviation of project management, and it is the name of the earliest Manhattan project in the United States. Later, it was introduced to China by Chinese education in 1950s (due to historical reasons, it was called overall planning method and optimization method). Now Taiwan Province Province is called an engineering project. Now project management is usually referred to as PM for short.

The definition of "pm" in English-Chinese Dictionary (Source: Baidu Dictionary);

prime minister

Abbreviations.

1.Former President 1.Pastmaster

2.= cashier

3. Magistrate

4. Postmaster General

5. Gendarmerie Commander

Prime minister

The symbol of the rare earth element promethium.

afternoon

Abbreviations.

1. Afternoon

2. Main memory

3. Pulse modulation