月份：2012年3月

How to calculate the transparency and threshold currents of laser, and the comparisons with LED light (2)

We define photon absorption rate as R12, which means the rate of generating new electrons by reducing the number of photons. Stimulated emission rate R21 represents the rate of generating new photons by recombining EHPs. Rsp is the spontaneous emission rate related to the spontaneous emission. Rst is the rate of density of electrons recombined through stimulated recombination. Thus: Rst = R21 – R12; Although Rst represents the rate of carriers recombination, it does not represents the rate of photons generation in the cavity. Because in a cavity, the EHP recombination only occurs in the active region with the volume of V = d*w*La, while the area of the photons that can be observed in the cavity is Vp = deff*weff*L which is larger than the active region (figure 1). We define Vp as the cavity region and use Γ (confinement factor) to represents the ratio of these two volumes: Γ= V/ Vp. Normally, Γ<1. So the actual photon generation rate is Γ* Rst.

Normally, LED light has the similar semiconductor constructions with laser. Such as: RGB led down light （RGB led down light in the application, significantly diversified than the white LED. White LED clarity and color purity are significantly inferior to RGB led down light. But RGB led down light on the control issues remain to be strengthened. ）, LED MR16 down light, LED street light.

 Figure 1: Active Region and Photons-occupied Region

Figure 1:  Active Region and Photons-occupied Region

Firstly, we analyse equation 1a:

This equation is obtained after the current excesses the threshold current Itr.

This equation is obtained after the current excesses the threshold current Itr. ε is the gain compression coefficient which we can assume to be 0 in the analytical calculation. Thus the last section of this equation (stimulated recombination of EHPs) is equivalent to vg*a(N-Ntr)*Np.

In this equation, ηiI/qV (rate of the injection carrier density) is the source of the carrier which comes from the injected current. ηi is the carrier injection efficiency: the ratio of the number of carriers that injected into the active region and the number of carriers that supplied by the current. The first loss of the carrier density is due to thermal loss, spontaneous emission and non-radiation recombination. We use N/τ to represents these losses, in which τ is the electron lifetime. The second loss is caused by electrons’ recombination: Rst.

We should give the best thing to others-high power led light bulb

“What you do not want done to yourself, do not do to others.” who really knows the meaning of this sentence. This tale is to tell you such information. I always thought he was a generous person, high power led light bulb just like eneltec led streetlight,  because I like to send something to others. When I bought  new clothes, through a few times, or simply naked, do not like to give cousin.Christmas, birthday parties received a lot of toys, jewelry, pick out their favorite, the rest of the hand to give as gifts. Relatives around me, friends, many of them have received my gift, and they will like it and thank me,high power led light bulb, all in good I thought.
The father did not think so. In his view, this ostensibly generous, in fact, is the mean.
In this regard, I think not.
One day, my father took me to visit his boss in the past they have been friends.
The boss enthusiasm a little more reserved. His father and he talked for a while, it got up to leave. He turned to his wife children, said: “the home of Apple to give them an aura.” My father politely declined, but they insisted to give.

Home, high power led light bulb, and his father opened the box and found inside some wrinkled, small apple than a duck circle. I could not help shouting: “What a mess! Throw it away!”

“What a mess! You should always remember these words when you do not like, do not need something to someone else, you get this sentence!” My face “brush” to look red. reminds me of someone else through the clothes, toys and accessories to pick leftover, high power led light bulb, when they returned home to open, they must have said the same.
The father said: “These apples are at least two messages: First, this is a gift, if it is to buy their own would not have put such a long time. Second, this is they pick the going gets left, threw a think Unfortunately, on the way to us and want us to thank them, the result is the opposite. ”
Father looked at me and went on to say: “Remember, do not fool others. He would like you to know the value of this thing or do not send to send to put what they think best, favorite, high power led light bulb, the most reluctant to someone else. ”
His father had said these words, let me a lifetime. Now, I do not casually send something to someone else.What have you learned from this passage, “What you do not want done to yourself, do not do to others.”

Only you know where the future is- halogen downlight led replacement

I can not tell you where in your future. Perhaps this all simplifies down is more clear today, better tomorrow, more willing to review yesterday, perhaps in the dusk of old men when able triumphant big grandson, said: “I was young, when one after another dreams, failed some, but I have are willing to be the goal, I go in this general direction. ”
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I asked ten people, they are not satisfied with the work now. I asked if they selected in known positions, they want to change where only one or two people tell me a vague direction, other people said to me: “I do not know, I am very confused.”

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As if from was born has been in a hurry, our motherland in a hurry Premiership America, we are in hurry to drag, there was not play the game the most annoying childhood only to study the “other child”. Reported all kinds are not interested in “hobby classes”, in particular, is nothing to do from 25 head and 70 feet to determine the number of chickens and rabbits “Mathematical Olympiad” in the cage, I would like to ask you how that lack of a cage, non- take chickens and rabbits kept together. All the way to carrying on primary, secondary, college entrance examination, college, graduate work for teachers and parents to learn English. halogen downlight led replacement.
There is an invisible pole thrust behind us, like the thrust with a group of brain emptying duck.
You want to be what you want to be what kind of, you have not considered. You only see in front of this step and before a duck ass from your three-step, the team is required to go where you never thought of, but also indifferent. Have you ever tried to stop and seriously ask yourself in the end I want to go! ?
This is a bad thing, because we are used to simply say that we grew up with a head duck, deviate from the point you want about the direction will be snapped back to the team, so swim to the eyes closed can swim out of a straight line when duck suddenly head back a grin: “the whole sky, let out fly!” why go back! You shake the degradation of the wings of the three hundred years, and found that he had never learned to fly, especially alone fly.
This is a happy thing, because you will find small to large, to learn how gregarious, you can continue to gregarious, along the existing road, followed behind the others, do not have to worry about the direction of tomorrow – or you have a painful thought, in the end for what to here today, in the end so, after a decade twenty years, New Year’s Eve, in the end is what doing such a job, marry a married , in the end is who? My future is not a dream, then where is the future.
I can not tell you where in your future.
But I can tell you their stories.
He said: The young man thought to have love will be all-powerful, and grow up to know the order reversed, usually omnipotent it be possible to have a love …
He changed several jobs, and opened his own company, doing their own thing. In his efforts, in order to find deep-sea a mermaid, and can easily roll up her hand. halogen downlight led replacement.
She said: I always thought my efforts, in order to raise my price, rather than each passing dare turn to pick the two-dollar store.
She said, in order not to look down on others, we must strive. Access to their own better skills, higher social status.
He said: I was a kid to see the bitch in groups of three on her hips on the road squalling, I feel very afraid. Afraid will have to live together and this has been. I hope to enter into a higher level, at least this level people can be civilized is not unreasonable. Hope that one day, can everyone unreasonable.
From the countryside to study all the way to the best professional in the best universities, and read to Dr.. To stay in a foreign ivory tower.
He said: I am one day suddenly found I want to do is reported as real as possible, as much as possible to show the world a real China, as well as to show a real world. halogen downlight led replacement.
So he finally found what he wanted since the day he worked hard for more than two years, and then to switch to the foreign media that his hope, and do all his efforts to complete his dream.
Maybe they still do not know in order to “what” to fight, perhaps all this simplifies down is clearer today, better tomorrow, more willing to review yesterday, perhaps in the dusk, old men, triumphant big grandson, said: “I was young, when one after another dream realized, the failure of some, but I have a willing to work to be the goal, I go in this general direction.”
You better than my neighbor’s uncle, his 2011 store 100 bags of salt, to death had not been able to finish.

Dream to be a led street light lens

“What’s your dream”, many students may be asked. I want to be a homeless, to travel around the world, riding the luxury of oil tankers under the cabin, leaning against the small glass point of view to the sea in the middle of the poor artists, and dreams of children, forget the hurt, forget a lot of sorrow .

Dream to be a led street light lens

I want to travel around the world, around every corner, and then with a flute, and a dog, led street light lens, so I have a begging tool, and partners in the night lonely. I lit a bonfire, gnawing expired bread, while sitting in the cathedral bell tower, the number of stars in the sky, then slowly fell asleep, and slowly dreaming.
I traveled every corner, and then photographed every smiling face, recording each one tears, happiness and sadness are always complementary, however, led street light lens,I hope that each kind-hearted people can forget the hurt, to enjoy happiness.
Every smiling face I want to be photographed, recorded each one tears, and then kiss every flower, every leaf, because we have too much laughter and pain, even if everyone is so small, but everyone is longing for happiness and struggle the feeling of pain is not as strong.
I want to kiss every flower, every leaf, and then kiss the afternoon sun, because it is true that everyone will experience grief and sorrow, but I am still willing to choose to believe, led street light lens,the world seems to slowly flowing spring water, silent, but no The Department is not.
I want to kiss the afternoon sun, then take my dog ​​to stray, in Salzburg Square, a fountain in Rome, a small street in Paris, the bridge in Venice, stop in front of the small gallery, appreciate every color, every moment of the picture, every trace of inspiration and big dreams of every little artist.
I would like to take my dog ​​to stray, to enjoy every inch of the wind, to the grasslands of Africa to the Caribbean Sea to the Caucasus mountains to the South Pole, to every one I could reach the place to go I can hug every inch of land, to feel the greatness of life, to forget the past and a little sad.
I want to enjoy every inch of the wind, every inch of time to enjoy the rest of life, and ask to go the tears from his eyes, and sew the wounds of the heart, and looked up at the sky at the distant snow-capped mountains, watching the birds flying, I imagine that I a pair of wings to escape from the pain now, but to meet future beautiful, not because of injury and lost confidence in, and just completely put down really have to pay, led streetlight lens, and then the courage to cross to the farther land.
I want to enjoy every inch of time the rest of life, I’m going to enjoy all the good and happiness of the world, to experience, to feel, to sympathize with, go to pity, and then back to my home, open my arms, hugging my favorite friends and loved ones, and then the rest of my life, to love, to strive, to seek and achieve the ideal.
I want to be a homeless, sail Inspired by the waves, the sun is my wings, take me to fly away. Here, I want to say that I want to be a led street light lens, which can help people to illuminate the whole world.

Led street lights-prevension against short sightedness

I incidentally read a book, talk about how the treatment of myopia. Beginning to see, feel weird, the method is so simple that many people do not to wear glasses. I originally thought it is a lie, and no care to this. But then I do the ideological struggle. Two months’ idleness, it is better to try, anyway, do something is not  harmful and no loss.

Led street lights-prevension against short sightedness

There are many ways the Internet these data, we can check, I selected a few methods to try for two months, LED streetlight visual acuity improved significantly. The first said that I have are how to do it.
1, standing somewhere in the past to find a distant tree and a tree, and then observed near the tree for a while, and then observe the distant tree for a while. This method to adjust the eye muscles, relax. Observed as much as possible to see the details of the tree.
Two, rub the palm of your hand, cover the eyes, repeatedly, so relax your eyes, and very comfortable, this action anytime, anywhere can do.
3, sunbathing, fine weather, eyes closed, facing the sun, let the light through the eyelid irritate the eye cells. e40 led street light. Myopia are very sensitive to light, a very bright light will blind the eyes or squint. This is done to improve the acceptance of our eyes to the light.
4, in the evening, the sky the stars when the number of stars to look for the stars with your eyes, but not staring at a star so that the eye fatigue.
Sitting or standing eye first level as the front, then your eyes do the movement up and down,e40 led street light so that the eyes try to stretch toward each direction in each direction, to stay a few seconds. Myopia eyes deformation, this method can be our eyes adjust back to normal shape, but also help to restore the eyes ability to focus.
6, multi-wink, wink can alleviate eye fatigue, this is always going to do.
To take off the glasses, then we’ll try not to wear glasses. May be most of the people and as I have been a wrong perception, is not wearing glasses, myopia will deepen. In fact this is wrong, e40 led street light. do not wear glasses our vision to be resumed, so do not interfere with normal work and study, we can not wear do not wear. By the way, do not wear glasses to see things when we will have habits, that is to look at things, squint your eyes or Deng Yanjing.Attention must not do so, once found their own eyes narrowed, and immediately stopped.This time not see how to do it more than blink.
To make our vision restored, the above method is necessary, very important, be sure to take it easy. A body, eyes relaxed, there is a psychological easy. We want to believe what your eyes will become good, not be anxious.
Everyone’s situation is different, so the recovery time is also different, and some few months, some for more than one year does not matter, the key is to adhere to, the action is simple, but we must do every day.
One time every day, but these methods are combined with each other, practice time is not fixed. Method, there are a lot of books and information we can look up the Internet, their own experience, e40 led street light. and hope that we can remove the glasses, we all work together.
If you practice, please tell your friends so that they also remove the glasses as soon as possible.

How to calculate the transparency and threshold currents of laser, and the comparisons with LED light. (1)

A laser diode is a laser where the active region is a semiconductor. We use this device to emit photons by applying the injected electric current to it to achieve population inverse (N2>N1) and the light with a certain range of frequency to stimulate it. As we all know, only under this circumstance, the laser diode can work as a laser. Otherwise, it will work as a LED light (only spontaneous emission like figure 1).

 How to calculate the transparency and threshold currents of laser, and the comparisons with LED light. (1)

Figure 1: spontaneous emission

When the atom spontaneously decay from a higher level to a lower level without any other stimulate, it can be defined as spontaneous emission. Spontaneous emission is the main emission pattern of LED light. Thus, if you compare a LED light (such as led streetlight, LED light) with the laser, the condensation of light of the former one is much less than the later one. That means the full width half maximum (FWHM) of the optical spectrum of LED light is larger than that of laser.

Here, we define Np as the photon density in the cavity and N as the carrier density in the cavity. The change of photon density with time can be represented as: dNp/dt; similarly, the change of electron density with time can be represented as: dN/dt; In the following steps, we will discuss the critical factor that determine dNp/dt and dN/dt.

A semiconductor has many energy levels. The band gap (Ec-Ev) of a certain semiconductor only depends on the material. Generally, an electron will stay in a lower energy level. It can convert to a higher level by absorbing energy, such as thermal energy, photons etc. It also can convert from a higher level to a lower level by emission energy (thermal or photons). There are three different conversions between electrons and photons in the cavity: spontaneous emission, stimulated emission and absorption. In the first two procedures, EHPs recombine to generate photons. While in the last procedure, a photon is absorbed to generate an EHP.

To have a led street light housing

To have a led street light housing

What is happiness? Different people may have different answers. For our happiness, courage is a very critical, the second is  the wise quality. Of course, we can not give yourself two qualities – the former our purest father, while the latter genetic from the mother – but whether we have the extent of these two qualities, determination and practice can improve them. This an “iron-made dice everything,” the world, led streetlight.we need to iron strong sense of awareness as to withstand fate, and to prevent others armor weapons. This is because human life is a battle. We are taking every step caused by battle. Voltaire said was right. “In this world, we only bulging sword forward in order to succeed; when we die, hands still clasped arms. Therefore, if a person saw the sky – or just on the horizon – appeared in the clouds, depressed discouraged, complaining that this person is timid, cowardly generation. Our motto should be: “the face of evil do not make concessions, ground it should be brave.” (Virgil Language), even if it is led street light housing.dangerous thing, as long as its outcome is still pending, as long as there is a more good outcome may be that we do not be timid, hesitant, and should make efforts to fight, as we also saw a small piece of blue sky, we can not cope with weather despair. Indeed, we should say: “Even if the world collapsed down, one of the ruins will not change his face.”
All sorts of benefits, not to mention life, even if the whole life is not worth it so frightened:led street light housing.
Therefore, his courageous life to bravely face the blows of fate. – Horace
However, this may become too far: the courage will lead to a rash wanton.
Shy and afraid of a certain degree is necessary for our survival in this world, just cowardly fear beyond the limits. Bacon than the preservation of the Plutarch discusses the interpretation of the fear made etymology further, his expression is impressive. Him from the “Pan” – this anthropomorphic nature – in the leads to this.led street light housing.
He said: the nature of things, so that all organisms have the fear, which enable them to escape the scourge, to save lives. Of this nature, however, will not know how to control a degree, it is always the fear of unwanted empty and those beneficial to the fear of mixing with all living things (if we can get a glimpse of his inner), especially in the human heart is full of nature fear. In addition, the nature typical characteristics of the fear is that it is not clearly aware of the basis of to germinal this fear, it is assumed even in understanding.Indeed, as a last resort when the fear itself become afraid of the reasons. As a result, My happiness is to have a led street light housing.

SpiderMan have super high flux led

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SpiderMan have super high flux led

Spider-Man is a Marvel Comics superhero. Created by Stan Lee and Steve Ditko, two of. Spider-Man book called, Peter Benjamin, Parker. Peter is an orphan, he and his Uncle Ben and Aunt May live together. Spider-Man is a purely comic roles, he has a special ability in this regard, on the other hand on weekdays, he has a lot of trouble and problems. In addition to the outside of comics, Spider-Man also appeared on the TV, movies, video games and other media. The Colombia Sony (Columbia Tristar, USA), produced in 2002 the film version of Spider-Man.

Spider-Man debut in August 1962, 15 of the magazine surprised fantasy, then very popular only with his cartoons.
Peter Parker in an extra-curricular activities, accidents a highly radioactive infection of the spider

“Spider-Man” comics (12) after the bite, get has spider general special abilities. Change the life of Peter Parker, decided to become Spider-Man the key lies in the class uncle being hurt, Peter believes that this was his error, and therefore choose to become Spider-Man to save more people in the world.
Comic focus on an adolescent hero who for the first time, which was considered a breakthrough, so that young readers are likely to resonate, and later this caricature took the better animation and drama, including three of the super-successful in recent years. films. Produced a series of “surprise” comic comic book, Spider-Man was growing from a shy high school student to a troubled college student and then end up married teachers, and become the superhero team the Avengers “a.

Thermal profile in the summer is coming, the world’s best-selling superhero comic, one of the hurried onto the big screen. The release of “Spider-Man” also marks the 40th anniversary of the comic available. The film focuses on a man named Peter – Parker (Peter Parker, Tobey – decorated Maguire, Tobey Maguire), students are a genetically modified spider bites, with superhuman strength, and like a spider, can climb up any surface. Peter – Parker vowed to use his super-ability and crime combat.

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Burst on the scene towering
Li Gun, was born in Jiaozuo City, the home of the basketball, my mother was in Henan Province basketball team, and my father in the armed forces often play basketball. Growth in this family, Li Gun, played little basketball sense of intimacy, and 8-year-old began learning to play basketball, basketball became his inseparable partner. Play happy basketball, coupled with hard training, Li Gun is particularly prominent among their peers to learn to play basketball. His good physical condition, the technology is also very comprehensive, especially outside shot, often dart-like precision.
Lee After several years of professional training of the municipal body training classes, the fledgling, he will fly to the blue sky fighting the sky. 2006, Lee in Ningbo, Zhejiang, a university study, and the university called up the school basketball team, began to surf in the college basketball league.

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high powered led lighting is one of led streetlight. Reagan for high powered led lighting should be better future? I’m afraid, high powered led lighting could be more safe in using.
Love in Shanghai
Lee in college basketball league on a small test chopper, a change in his destiny – the basketball coach of the Wuhan Institute of Shan Weiguo. Shan Weiguo, sitting in the stands in an NCAA phase of a lively pitch root, by and discuss Lee root, it will into the Wuhan Institute of basketball team.
Shan Weiguo, “sword”, was the decline of the Shanghai Men’s Basketball reserves “Young Guard”. Wuhan Institute of Shan Weiguo, well-polished piece of diamonds in the rough, Li Gun, promise to his wondering synthesizer. Lee root when you want to practice 500 three-pointers.
After a year of hard work, 2008, by a single Patriotic “matchmaker”, the Shanghai team will be “jack of all trades” root “Soong” Since then, Li Gun, officially became a CBA team. CBA freshman season in 2008 and 2009, Li Gun, the Shanghai team played 55 times, 17 times as a starter, averaging 9.32 points, a total score of 466 points.
Your hand
With the Shanghai Men’s Basketball “marriage” in the 2009-2010 season, the career of Lee root mixed.
Hi, this season men’s basketball have a new boss – Chinese men’s basketball “Big Brother” Yao Ming. Yao entered the Shanghai team, you can resolve the funding dilemma faced by the Shanghai team, and the Shanghai Men’s Basketball to recruit high-level coaches and foreign aid, you can also get the guidance of the world’s most advanced basketball team. Yao Ming, a Shanghai men’s basketball since 2002, for the first time broke into the CBA playoffs. “River water to river full, as one of the basketball team in Shanghai, Li Gun, performance opportunities will increase.
The worry is that the introduction of a high level of foreign aid due to the team, the young Li Gun reduced to the bench, playing fewer opportunities to feel poor. Such as reporters to watch the playoffs, second television, not much chance to play, Li Gun committed serve five-second violation, and bottom line serving opponent steals this low-level errors, so the performance of Shanghai coach not only for he boomed, also lost the chance to play.
Nothing down, how the rainbow? David Beckham is the “Caterpillar” into a “butterfly”. Expect Shangxian Qing astringent Li Genming can have beautiful wings, a better future.
Li Gun transfer to Qingdao Double Star team in 2010.

Raphael Sanzio print high watt led lights

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Raphael Sanzio

Raphael is a distinguished painter in Italy, and Leonardo da Vinci, Michelangelo said Renaissance three heroes, the youngest one is also a three heroes. Rafael die at the age of 37 years old, but because of the diligence of his creation, leaving 300 pieces of precious works of art to the world. His work public gambling house long, formed its own unique style, a representative figure of the practices’, also represents when people advocate the aesthetic taste of a model for future generations classicist unattainable. His masterpiece painting “Sistine Madonna” fresco “The School of Athens.

Raphael’s father was the court’s two painter, so his childhood with his father to study painting. The age of 11, his father died, he was an assistant to a painter. Later, he studied the works of the Florentine artists of the 15th century, and actively absorb the advantages and strengths of the factions painter. Formed its own harmonious and clear, beautiful and elegant artistic style and embarked on the original road. The mother of Raphael’s death in 1491, Raphael was only eight years old, his father remarried in August 1, 1494. Orphaned at eleven, Raphael’s formal guardian became his only uncle. A young age to follow his father to study painting, and later converted to follow Perugino’s studio to study painting in 1500 apprenticeship.
In 1504, the 21-year-old Raphael painting “Our Lady of the wedding. This works even beyond Perugino, is a composition or image building and innovation. Especially the works of the Virgin Mary Fu Yuese dignified, elegant, the balance of the screen and the background description, are rare works.
1504, Rafael residence in Florence, he is by the local Republican politics, the spirit of democracy and humanist thought, also to learn that more than · the composition of Leonardo da Vinci and Michelangelo human performance and style of Leo , the maturing of his style, which quickly and the two par.
His painting the portrait of the Virgin with maternal tenderness as well as young and healthy, reflecting the humanist thought. One of the most famous is the “the Anxi Emperor The Virgin,” the grass of the Virgin “and” Foligno Virgin “. 1513 -1514 mid-large canvas painting of Raphael on the Italian lira, like the triangular composition of the “Sistine Madonna” by the Virgin Mary and the saints, dignified and balanced, the Virgin Mary and Jesus the performance of the great maternal love. In addition, the chair and the Virgin and Child, “Alba Madonna” is a perfect work.
In 1509, he was the Pope Julius II (Pope Zhu) invites drawing Vatican frescoes, of which the most outstanding murals at the Office of the signature. These murals represent four of the human spirit of theology, philosophy, poetry and law, work performance and architectural decoration fully harmonious, solemn and obvious, colorful. During this period, important works include ” was expelled from the Temple” Boer satisfied that the mass of the Boer Ge fire “Niagara Thailand and Asia Triumph. His painting in the age of 23 self-portraits and the “Sistine Madonna”. The masterpiece, depicting a scholar “the Castiglione like” and depicting a girl draped scarf girl. In the spring of 1520, has been seriously ill he is still painting “Christ varactor,” failed to complete the last of his death.