How to make this sentence short?

Question

I have two sentences:The effect of increasing LED zenith angle on the illuminance is analyzed first. The effect of increasing LED zenith angle on the received power will be deduced from the effect of increasing LED zenith angle on the illuminance.Now, I want to make the second sentence short. How can I rewrite it. Something like:-The effect of increasing LED zenith angle on the illuminance is analyzed first. The effect on the received power will be deduced from the one on the illuminance.or-The effect of increasing LED zenith angle on the illuminance is analyzed first. From it, we will deduce the one on the illuminance.Is the meaning of the secend sentence clear, or correct if I express in that way? Or can you suggest me other way to make my second sentence short without loss of its meaning.Thank you!

Sbolton · Accepted Answer

No, the last version of your second sentence changes the meaning. I would suggest something like:

The effect of increasing LED zenith angle on the illuminance is analyzed first. This will then be used to deduce the effect on the received power.

Dimsumexpress · Answer

The effect of increasing LED zenith angle on the illuminance is analyzed first. The effect on the received power will be deduced from the one on the illuminance.

The pink text doesn't sound technically intelligible to me. Do human need to adjust the illuminance or it is self-regulated?

If my perception is correct, this sounds like s type of electronic circuit which should contain a servo circuitry that can self-adjust the illunminance based on the initial powered analysis. If the illuminance is too bright, then subsequent illunimance is reduced and regulated based on analyzed illuminance without human involement. Is is right?

James do · Answer

dimsumexpressThe effect of increasing LED zenith angle on the illuminance is analyzed first. The effect on the received power will be deduced from the one on the illuminance.
The pink text doesn't sound technically intelligible to me. Do human need to adjust the illuminance or it is self-regulated?

If my perception is correct, this sounds like s type of electronic circuit which should contain a servo circuitry that can self-adjust the illunminance based on the initial powered analysis. If the illuminance is too bright, then subsequent illunimance is reduced and regulated based on analyzed illuminance without human involement. Is is right?

. No. It is much simpler.

I'm writing a paper about wireless communication using light radiated from LED. When we change the direction of the LED, the illuminance and power received at the receiver will be changed. And I analyze the effect of the changing of LED direction on the received power and illuminance.

Anyway, can you tell me if my sentence is correct. Is there any better way, like the one suggested by sbolton, to write that sentence?

Dimsumexpress · Answer

It is not clear to me what you meant by "the change of LED direction" and  what exactly this device does. So I can't offer you a better version. I do know that "illuminance" here refers to the intensity of the LED. But change of LED direction buffles me.

James do · Answer

It will be clear if you read my paper. Anyway, changing the LED position, or direction leads to the change in illuminance and power. What if I want to make these sentence short:

The effect of changing LED position on the illuminance is analyzed first. The effect of changing LED position on the received power will be deduced from the effect of changing LED position on the illuminance.

I hope you can understand what I meant by "changing LED position" here.

dimsumexpressIt is not clear to me what you meant by "the change of LED direction" and what exactly this device does. So I can't offer you a better version. I do know that "illuminance" here refers to the intensity of the LED. But change of LED direction buffles me.

Dimsumexpress · Answer

<<<<The effect of changing LED position on the illuminance is analyzed first. The effect of changing LED position on the received power will be deduced from the effect of changing LED position on the illuminance.>>>

No, I still can't fully understand what this means, and I have been working in the tecn industry over 25 years, and I did quite a bit of technical writing. This phrase is not technically intelligible " changing LED position on the illuminance" in my opinion.

Why? LED (light emitting diode) are typically fixed or soldered on a PCB. How do you change the postions of LED"S?

That's why I couldn't help you because I didn't understand the process you described. If I can't understand it, chances are, the person who grades your paper may have the same qusetion. That's why I was baffled.

James do · Answer

thank you!
The horizontal illuminance at a particular point is given by [1]:

where is the center luminous intensity of the LED, is the irradiance angle, is the incidence angle, is the distance between the LED and the PD. Assume that the LED has a Lambertian radiation pattern, the radiant intensity depends on the order of Lambertian emission , which is related to the semi-angle at half power by the equation:

Of course, I have to explain alot about the direction of LED before I write that sentence. "changing LED position" means change the position of LED in the room, far or near the center. By changing LED position, the illuminance at a specific point in the floor will change. It is similar with the LED direction, when the LED face straight down to the flloor, the illluminance will be high at the center of the room, when the LED is tilt towards the room corner, the illuminance at the center of the room will decrease. I cannot explain fully here, but it's something like that.

If you want to understand more, you can read this paper

T. Komine and M. Nakagawa, “Fundamental analysis for visible-light communication system using LED lights,” IEEE Trans. Consumer Electronics, Vol. 50, no. 1, 2004, pp. 100-107.

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