Simultaneous perturbation stochastic approximation - Revision history

106.51.241.231: Added external link to a reference

2014-06-18T14:47:42Z

Added external link to a reference

← Older revision		Revision as of 16:47, 18 June 2014
Line 1:		Line 1:
	~~[[Image:Contrast transfer function.jpg\|thumb\|Typical contrast transfer function observed from an electron micrograph]]~~		Emotional eating can be a terrible regarding weight gain, so avoid doing because much as we can. Exercise is often a great technique to get gone sadness. Reports have shown that exercise releases endorphins, giving your mood a good boost while helping you [http://raspberrytrimdiet.net/ Raspberry Trim Reviews] lose pounds.<br><br>If happen to be watching your caloric intake, do not eat jointly friends. Research found that men ate 60 percent more calories when they ate using buddies check it again they ate with a person or partner of attractive Raspberry Trim potential partners. The reason in this is that individuals will often match their food intake to associated with the people they are eating when it comes to.<br><br>Sometimes, additionally you eat after you are not even hungry. This is definitely unpleasant while there is a tendency that there's always something good eat much. Should this circumstance occurs, attempt to avoid eating a lot and usually take natural supplements such as [http://raspberrytrimdiet.net/ Raspberry Trim Reviews] ketone. Likewise, you can head for almost any feel-better hobby involving no food like running, walking, or meditation.<br><br>1- Start off off, require have create a proper plan. This is very important, and surely you can't afford to miss this stride. It is good with regard to as clear and unambiguous as achievable. You must know straight from the 1 as to how much fat you prefer to lose? What is the estimated deadline for the very same?<br><br>3- After you've the food regimen plan, make sure you observe it absolutely. Don't add or subtract something without consulting your doctor or the individual who charted which. Keep in mind, it's in order to follow program plan exactingly. If it says you must drink one glass water at 3 pm, you've no choice, it is essential to drink this. Importantly, drink it on evening.<br><br>There are few things better than realizing in order to are reaching all of one's weight loss goals. Even if you may do not be shedding the pounds as quicly as it seems Raspberry Trim like like, if you're stick with things everything will work out routine in the final.<br><br>2- Talk to a nutritionist or seek the aid of weight loss expert(s). Strain to reach someone who has actually lost a few pounds as well as get tips. Such people can represent great can be helpful.<br><br>Diet is certainly related to body weight, all people who to do is realize how whole process operates. If you make use of [http://raspberrytrimdiet.net/ Raspberry Trim Reviews] food smartly, you is able to reduce a regarding weight. Does not matter what is your age, what exactly is your marital status, simply how much weight you have, this relation is really a proven one and deliver the results under all circumstances provided you stick to it.

	~~The '''contrast transfer function'''<ref name="Spence1982">Spence~~, ~~John C~~. H. ~~(1988 2nd ed) ''Experimental high-resolution electron microscopy'' (Oxford U. Press~~, ~~NY) ISBN 0195054059.</ref><ref name="Reimer97">Ludwig Reimer (1997 4th ed) ''Transmission electron microscopy: Physics of image formation and microanalysis'' (Springer, Berlin)~~ [http://~~books~~.~~google.com~~/~~books?id=3_84SkJXnYkC preview~~].<~~/ref~~><~~ref name="Kirkland1998"~~>~~Earl J. Kirkland (1998) ''Advanced computing in electron microscopy'' (Plenum Press~~, ~~NY)~~.~~</ref> is the equivalent of the [[optical transfer function]] in light~~ that ~~affects images collected in~~ a ~~[[transmission electron microscope]]~~. The ~~contrast transfer function must be corrected~~ in the ~~images in order~~ to ~~obtain high resolution structures in three-dimensional electron microscopy, especially [[cryo-electron microscopy]]~~.

	~~The [[oscillations]] of contrast transfer functions have the form (not including the [[Envelope (mathematics)\|envelope]] function):~~

	~~:<math>~~
	~~\operatorname{CTF}(\vec{s}) \; = \sqrt{1 - A^2 \,} \cdot \sin{ \left( \gamma(\vec{s}) \right)} \, + \, A \cdot \cos{ \left( \gamma(\vec{s}) \right)}~~
	<~~/math~~>

	~~where ''A'' is the amplitude contrast.~~<~~ref name=malick05~~>~~{{cite journal \|last1=Malick \|first1=S~~.P. ~~\|year=2005 \|title=ACE~~: ~~Automated CTF Estimation \|journal=Ultramicroscopy \|volume=104 \|pages=8–29 \|issue=1 \|doi=10~~.~~1016~~/j.~~ultramic.2005.02.004 }}</ref> The amplitude contrast term~~ can ~~be converted into a phase shift, using the [[List of trigonometric identities#Linear combinations\|linear combination trigonometry rule]]:~~

	~~:<math>~~
	~~\operatorname{CTF}(\vec{s}) \; = \sqrt{1~~ - ~~A^2 \~~,~~} \cdot \sin{ \left( \gamma(\vec{s}) \right)} \~~, ~~+ \, A \cdot \cos{ \left( \gamma(\vec{s}) \right)} \; = \; \sin{ \left( \gamma(\vec{s}) + \varphi \right)}~~
	~~</math>~~

	~~where <math>\varphi = \arcsin{(A)}</math>~~. ~~The function~~ <~~math~~>~~\gamma(\vec{s})~~<~~/math~~> ~~is defined as:~~

	~~:<math>~~
	~~\gamma(\vec{s}) = \; \gamma(s, \theta) = \;~~ -~~\frac{\pi}{2} \~~, ~~C_s \~~, ~~\lambda^3 \, s^4 \; + \; \pi \lambda \, z(\theta) \, s^2~~
	~~</math>~~

	~~where ''r'~~' is the ~~radius from~~ the ~~center of~~ the ~~image, ''C~~<~~sub~~>s<~~/sub~~>'' is the ~~[[spherical aberration]]~~, ~~λ is the wavelength of the electron beam (usually converted from the potential difference voltage) and ''z~~'' is ~~the amount of defocus (using the convention that underfocus is negative and overfocus is positive)~~<~~ref name=malick05/~~><~~ref~~>~~{{cite web \|url=http://www.maxsidorov~~.~~com/ctfexplorer/webhelp/background.htm \|title=What Is CTF (Contrast Transfer Function)? \|accessdate=July 29, 2011 \|author=Maxim V. Sidorov \|work=ctfExplorer }}</ref>~~

	~~Furthermore,~~ if the ~~CTF is [[astigmatic]]~~, ~~the defocus becomes a function of the angle~~ '~~'θ'' where~~ the ~~astigmatic angle, ''θ~~<~~sub~~>~~ast~~<~~/sub~~>~~'' given by:<ref>{{Cite pmid\|12781660}}</ref><ref>{{Cite pmid\|8867604}}</ref>~~

	~~:<math>~~
	~~z(\theta) \; = \; z_{\mathrm{avg}} + \frac{z_{\mathrm{diff}}}{2} \cos{\left(~~ 2~~(\theta~~ - ~~\theta_{\mathrm{ast}}) \right)} \;~~
	~~= \; z_1 \!\cdot\! \cos^2{\left~~( ~~\theta - \theta_{\mathrm{ast}} \right~~)~~} \; + \; z_2 \!\cdot\! \sin^2{\left( \theta - \theta_{\mathrm{ast}} \right)}~~
	<~~/math~~>

	~~where~~ <~~math>z_{\mathrm{avg}} = \frac{z_1 + z_2}{2}</math~~> is ~~the average defocus and <math>z_{\mathrm{diff}} = z_1 - z_2</math>~~ is ~~the difference between the maximal and minimal defocus in the CTF~~. ~~Where the defocal difference is defined such that:~~

	~~<math>\left\| z_2 \right\| > \left\| z_1 \right\| \;</math> or~~ ~~<math>\; \frac{z_2}{z_1} > 1</math>~~

	~~== See also ==~~

	* [[Optical transfer function]]
	* [[Point spread function]]
	* [http://~~www.wadsworth~~.~~org/spider_doc/spider/docs~~/~~techs/ctf/ctf.html Contrast transfer function (CTF) correction]~~
	* [[Airy disk]], ~~different but similar phenomena in light~~
	* [http://www.~~youtube.com/watch?v=I3_4HF1ZeIQ Talk on~~ the ~~CTF by Henning Stahlberg]~~
	* [http://em-outreach.ucsd.~~edu/web-course/ref2.html CTF reading list]~~

	~~== References ==~~
	~~<references/>~~

	~~[[Category:Microscopes]]~~
	~~[[Category:Protein structure]]~~

217.109.185.32: /* Sketch of the proof */

2014-01-23T16:07:30Z

Sketch of the proof

← Older revision		Revision as of 18:07, 23 January 2014
Line 1:		Line 1:
	~~Indoor gardeners usually ask how far away their plant develop lights need to be from their plants but the answer depends on what stage of growth they are in~~. ~~It really is crucial to get the appropriate distance as the effectiveness of the lights are drastically reduced by even being just a tiny farther away~~ from ~~the best of the canopy. You can choose the most effective LED grow lights for sale that can be bought for~~ an ~~very affordable price tag~~. ~~It is really significant to get the exact develop lights when you need to have to cultivate a residence garden~~. ~~Even although we can purchase several types of grow lights, we should think about the added benefits of employing LED grow lights~~. ~~Presently~~, ~~gardeners continue to utilize these lights because of providing the exact illumination to any kind of indoor plants~~.<br><br>~~Even even though the upfront item cost~~ of ~~LED lighting is larger than fluorescent~~, ~~the power efficiency and bulb lifespan make LED lighting the most inexpensive~~ [http://~~bestgrowlightsguide~~.com/~~best-grow-lights-spend-wisely-for-your-indoor-gardening/ grow lights~~] ~~to use~~. ~~And surprisingly, I wouldn't even propose buying a red & blue~~ "~~LED grow light~~", ~~because the finest solution seems to be standard white LED lights! Certainly, the list of the viable advantages of grow tents is just endless~~.<br>~~<br>Petiole rot occurs when petioles touch~~ the ~~edge~~ of the ~~pot and create brown, sunken regions at points of get~~ in ~~touch with~~. ~~Petiole rot can~~ be ~~avoided by waxing~~ the ~~pot rim or covering it with aluminum foil. Metal Halide bulbs come~~ in ~~all spectrums~~, ~~from specialized MH bulbs that are made~~ especially ~~for early vegetative development~~, ~~to equally specialized bulbs that target~~ the ~~heart of your plants flowering cycle~~.<br><br>~~For anyone who wants to begin~~ a ~~rather massive garden on~~ the ~~inside~~ of ~~the house~~, ~~the Hydrofarm JSV4~~ 4~~-Foot Jump Begins T5 Develop Light is a great choice.~~ ~~This tends to make it attainable to develop a garden in any room of the home~~, ~~or even a closet~~, as the ~~lighting gear is going to operate anyplace. For anybody who is serious with increasing plants on~~ the ~~inside~~ of the ~~home~~, ~~the Hydrofarm Develop Light is an exceptional alternative to go with.~~<br><br>~~LED grow lamps are effective for~~ the ~~reason that they have~~ the ~~capability to generate blue~~ and ~~red these two colors and hence, lead to minimal wastage~~ of ~~energy. LED plant lights emit very small heat, which indicates~~ that ~~even if they have been left on for numerous days, it will be probable for you to touch them with out burning your hand. These LED develop lights measure 10 inch x two.five inch thick when hanging.~~<br><br>~~I am at present attempting to grow some plants in my cube at perform and have been searching for as substantially info on leds as possible. Cant have [~~http://~~Freeauction~~.tk/~~item~~.~~php~~?id=~~43413&mode~~=~~1 normal sized~~] ~~house plants mainly because they turn~~ the ~~lights off on~~ the ~~weekends and they die a slow death. If anyone here can do reflow soldering~~, ~~then the most economical~~ & ~~possibly superior way to develop grow lights is~~ by ~~mixing spectrums using luxeon rebel lights.~~ ~~If i had my way, i'd just have my personal plot of land~~ and ~~develop all of my needed veggies.~~<br><br>~~The distinction~~ is ~~a metal halide lamp offers off a light with a lot of blue~~ in the ~~spectral output, ideal for~~ the ~~veg stage of any plant growth. There are other lighting selections accessible when it comes to plant lighting~~ such ~~as CFL and LED grow lights which are becoming additional common due to low power usage and low heat output. Web-sites like Develop Blu can supply a wide selection of develop lights for you.~~<br><br>~~Grow light catalogs confront you with five various sorts of lights: fluorescent, compact fluorescent, metal halide, high-pressure sodium, and LEDs.~~ ~~They are glass tubes filled with mercury glass and coated inside with material that fluoresces—that is, lights up when it's excited by ultraviolet light.~~ ~~This makes them~~ [http://~~Gnlao~~.~~com~~/~~gne~~/~~blogs~~/~~post~~/~~4697 capable~~] ~~of giving your indoor plants precisely what they want for every single stage of growth.<br><br>By focusing on the customer~~, ~~Dorm Grow has discovered what folks want and what they are unhappy with~~. ~~Hydro Grow take pride in getting capable to convert even the most technologically averse growers to LED innovations, something that is under no circumstances uncomplicated~~. ~~Sustaining~~ the [http://~~simple~~-~~crafts~~.~~com~~/~~members~~/~~makaybratcher~~/~~activity/128287/ suitable distance~~] ~~with LED lights will substantially increase your grows. Set up your develop lights the identical way you would set up a lamp.~~		[[Image:Contrast transfer function.jpg\|thumb\|Typical contrast transfer function observed from an electron micrograph]]

			The '''contrast transfer function'''<ref name="Spence1982">Spence, John C. H. (1988 2nd ed) ''Experimental high-resolution electron microscopy'' (Oxford U. Press, NY) ISBN 0195054059.</ref><ref name="Reimer97">Ludwig Reimer (1997 4th ed) ''Transmission electron microscopy: Physics of image formation and microanalysis'' (Springer, Berlin) [http://books.google.com/books?id=3_84SkJXnYkC preview].</ref><ref name="Kirkland1998">Earl J. Kirkland (1998) ''Advanced computing in electron microscopy'' (Plenum Press, NY).</ref> is the equivalent of the [[optical transfer function]] in light that affects images collected in a [[transmission electron microscope]]. The contrast transfer function must be corrected in the images in order to obtain high resolution structures in three-dimensional electron microscopy, especially [[cryo-electron microscopy]].

			The [[oscillations]] of contrast transfer functions have the form (not including the [[Envelope (mathematics)\|envelope]] function):

			:<math>
			\operatorname{CTF}(\vec{s}) \; = \sqrt{1 - A^2 \,} \cdot \sin{ \left( \gamma(\vec{s}) \right)} \, + \, A \cdot \cos{ \left( \gamma(\vec{s}) \right)}
			</math>

			where ''A'' is the amplitude contrast.<ref name=malick05>{{cite journal \|last1=Malick \|first1=S.P. \|year=2005 \|title=ACE: Automated CTF Estimation \|journal=Ultramicroscopy \|volume=104 \|pages=8–29 \|issue=1 \|doi=10.1016/j.ultramic.2005.02.004 }}</ref> The amplitude contrast term can be converted into a phase shift, using the [[List of trigonometric identities#Linear combinations\|linear combination trigonometry rule]]:

			:<math>
			\operatorname{CTF}(\vec{s}) \; = \sqrt{1 - A^2 \,} \cdot \sin{ \left( \gamma(\vec{s}) \right)} \, + \, A \cdot \cos{ \left( \gamma(\vec{s}) \right)} \; = \; \sin{ \left( \gamma(\vec{s}) + \varphi \right)}
			</math>

			where <math>\varphi = \arcsin{(A)}</math>. The function <math>\gamma(\vec{s})</math> is defined as:

			:<math>
			\gamma(\vec{s}) = \; \gamma(s, \theta) = \; -\frac{\pi}{2} \, C_s \, \lambda^3 \, s^4 \; + \; \pi \lambda \, z(\theta) \, s^2
			</math>

			where ''r'' is the radius from the center of the image, ''C<sub>s</sub>'' is the [[spherical aberration]], λ is the wavelength of the electron beam (usually converted from the potential difference voltage) and ''z'' is the amount of defocus (using the convention that underfocus is negative and overfocus is positive)<ref name=malick05/><ref>{{cite web \|url=http://www.maxsidorov.com/ctfexplorer/webhelp/background.htm \|title=What Is CTF (Contrast Transfer Function)? \|accessdate=July 29, 2011 \|author=Maxim V. Sidorov \|work=ctfExplorer }}</ref>

			Furthermore, if the CTF is [[astigmatic]], the defocus becomes a function of the angle ''θ'' where the astigmatic angle, ''θ<sub>ast</sub>'' given by:<ref>{{Cite pmid\|12781660}}</ref><ref>{{Cite pmid\|8867604}}</ref>

			:<math>
			z(\theta) \; = \; z_{\mathrm{avg}} + \frac{z_{\mathrm{diff}}}{2} \cos{\left( 2(\theta - \theta_{\mathrm{ast}}) \right)} \;
			= \; z_1 \!\cdot\! \cos^2{\left( \theta - \theta_{\mathrm{ast}} \right)} \; + \; z_2 \!\cdot\! \sin^2{\left( \theta - \theta_{\mathrm{ast}} \right)}
			</math>

			where <math>z_{\mathrm{avg}} = \frac{z_1 + z_2}{2}</math> is the average defocus and <math>z_{\mathrm{diff}} = z_1 - z_2</math> is the difference between the maximal and minimal defocus in the CTF. Where the defocal difference is defined such that:

			<math>\left\| z_2 \right\| > \left\| z_1 \right\| \;</math> or <math>\; \frac{z_2}{z_1} > 1</math>

			== See also ==

			* [[Optical transfer function]]
			* [[Point spread function]]
			* [http://www.wadsworth.org/spider_doc/spider/docs/techs/ctf/ctf.html Contrast transfer function (CTF) correction]
			* [[Airy disk]], different but similar phenomena in light
			* [http://www.youtube.com/watch?v=I3_4HF1ZeIQ Talk on the CTF by Henning Stahlberg]
			* [http://em-outreach.ucsd.edu/web-course/ref2.html CTF reading list]

			== References ==
			<references/>

			[[Category:Microscopes]]
			[[Category:Protein structure]]

en>DexDor: /* New References */ rm unnecessary heading, rm Terminology cat (the title may be a term, but the article is not about language)

2012-06-23T13:14:45Z

New References: rm unnecessary heading, rm Terminology cat (the title may be a term, but the article is not about language)

New page

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