- published: 14 Dec 2012
- views: 405305
PID may refer to:
Pelvic inflammatory disease or pelvic inflammatory disorder (PID) is an infection of the upper part of the female reproductive system namely the uterus, fallopian tubes, and ovaries, and inside of the pelvis. Often there may be no symptoms. Signs and symptoms, when present may include lower abdominal pain, vaginal discharge, fever, burning with urination, pain with sex, or irregular menstruation. Untreated PID can result in long term complications including infertility, ectopic pregnancy, chronic pelvic pain, and cancer.
The disease is caused by bacteria that spread from the vagina and cervix. Infections by Neisseria gonorrhoeae or Chlamydia trachomatis are present in 75 to 90 percent of cases. Often multiple different bacteria are involved. Without treatment about 10 percent of those with a chlamydial infection and 40 percent of those with a gonorrhea infection will develop PID. Risk factors are similar to those of sexually transmitted infections generally and include a high number of sexual partners and drug use. Vaginal douching may also increase the risk. The diagnosis is typically based on the presenting signs and symptoms. It is recommended that the disease be considered in all women of childbearing age who have lower abdominal pain. A definitive diagnosis of PID is made by finding pus involving the fallopian tubes during surgery. Ultrasound may also be useful in diagnosis.
A proportional–integral–derivative controller (PID controller) is a control loop feedback mechanism (controller) commonly used in industrial control systems. A PID controller continuously calculates an error value as the difference between a measured process variable and a desired setpoint. The controller attempts to minimize the error over time by adjustment of a control variable, such as the position of a control valve, a damper, or the power supplied to a heating element, to a new value determined by a weighted sum:
where , , and , all non-negative, denote the coefficients for the proportional, integral, and derivative terms, respectively (sometimes denoted P, I, and D). In this model,
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I'm writing a book on the fundamentals of control theory! Find out more here: https://youtu.be/aLlbwk68-tw In this video I introduce the topic of PID control. This is a short introduction design to prepare you for the next few lectures where I will go through several examples of PID control. This video explains why we need feedback control and how PID controller are simple and efficient ways to ensure you have a feed back system that meets your requirements. I will be loading a new video each week and welcome suggestions for new topics. Please leave a comment or question below and I will do my best to address it. Thanks for watching! Don't forget to subscribe! Follow me on Twitter @BrianBDouglas!
In this video I try to explain in simple terms, the black magic and voodoo that happens in a PID system, such as the ones used in our multirotor flight controllers like the Naze32 and CC3D. As usual, I've take a few liberties to make it easier to understand what can otherwise be a very complicated subject.
Pelvic Inflammatory Disease (PID) Instructional Tutorial Videos CanadaQBank.com
Pelvic inflammatory disease, commonly called PID, is an infection of the female reproductive organs. PID is one of the most serious complications of a sexually transmitted disease in women: It can lead to irreversible damage to the uterus, ovaries, fallopian tubes, or other parts of the female reproductive system, and is the primary preventable cause of infertility in women. --------------------------- SUBSCRIBE and LIKE--- http://goo.gl/c8vHHg Best Medical Books Link Below ----- http://goo.gl/XHvpZA Best Medical Instrument Link Below ----- http://goo.gl/pW1PZt ------------------------ Find us on Facebook : https://www.facebook.com/groups/354791764704980/ https://www.facebook.com/Medicalvideosfordoctors https://www.facebook.com/freemedicaltextbooks Join Our Forum: http://www.m...
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A description of the math behind PID control using the example of a car's cruise control.
http://www.feedinco.com http://sites.google.com/site/controlandelectronics/understanding-pid a tutorial on PID to understand better the theory behind the Proportional Integral Derivative control Theory
Find my courses for free on konoz! https://konozlearning.com/#!/invitation/control-system-lectures In this video I continue the topic of PID control. We walk through a simple control system and visualize how each of the three paths, P, I, and D, all address specific problems that arise in a typical system. I try to use very little math in this lecture because I want to show you that at the foundation PID control is very intuitive. Most of it you can reason through. Errata: 11:50 I should have increased theta for just a moment and then had it come back down to the same position at the end of the graph. This is because the pedal position would settle at the same value if the speeds before the chase started and after catching-up are same. I will be loading a new video each week and ...
This video gives an example of a PID controller and explains its parts.
Push up
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Boom!
Here comes the
Boom!
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Here comes the boys from the South
Boom!
Here comes the
Boom!
Ready or not?