Znn3bq.jpeg
²é¿´: 9498  |  »Ø¸´: 3

cyb20070208

ľ³æ (ÕýʽдÊÖ)

[ÇóÖú] ¹âÏËËðºÄµ¥Î»µÄת»¯£ºdB/m »»Ëã³Écm-1

¹âÏËËðºÄµ¥Î»µÄת»¯£ºdB/m »»Ëã³Écm-1

ÎÒ²âµÄ¹âÏ˵ÄËðºÄΪ0.2db/m,ÏÖÔÚÏëת»¯ÎªÒ»cm-1 Ϊµ¥Î»£¬ÇëÎÊÄÄλ¸ßÈËÖ¸µãÒ»¶þ£¿£¿£¿Ð¡µÜ¸Ð¼¤²»¾¡¡£
»Ø¸´´ËÂ¥

» ²ÂÄãϲ»¶

ÒÑÔÄ   »Ø¸´´ËÂ¥   ¹Ø×¢TA ¸øTA·¢ÏûÏ¢ ËÍTAºì»¨ TAµÄ»ØÌû

Èκ£ÖÐ

Ìú¸Ëľ³æ (ÕýʽдÊÖ)

2Â¥2016-04-12 15:23:33
ÒÑÔÄ   »Ø¸´´ËÂ¥   ¹Ø×¢TA ¸øTA·¢ÏûÏ¢ ËÍTAºì»¨ TAµÄ»ØÌû
ÒýÓûØÌû:
2Â¥: Originally posted by Èκ£ÖÐ at 2016-04-12 15:23:33
0.2dB/m=20dB/cm

3Â¥2017-11-02 17:56:28
ÒÑÔÄ   »Ø¸´´ËÂ¥   ¹Ø×¢TA ¸øTA·¢ÏûÏ¢ ËÍTAºì»¨ TAµÄ»ØÌû

²»ÊǺܵ­¶¨

гæ (³õÈëÎÄ̳)

½áºÏ´«ÊäËðºÄµÄ¹«Ê½ºÍdBµÄת»¯¹«Ê½£º
I0=I*exp£¨a*x£©   x=1cm »òÕß1m   ÍƳöI0/I=exp(a)
dB=10*lg(I0/I)=10lg(exp(a))
4Â¥2018-01-04 22:38:15
ÒÑÔÄ   »Ø¸´´ËÂ¥   ¹Ø×¢TA ¸øTA·¢ÏûÏ¢ ËÍTAºì»¨ TAµÄ»ØÌû
Ïà¹Ø°æ¿éÌø×ª ÎÒÒª¶©ÔÄÂ¥Ö÷ cyb20070208 µÄÖ÷Ìâ¸üÐÂ
×î¾ßÈËÆøÈÈÌûÍÆ¼ö [²é¿´È«²¿] ×÷Õß »Ø/¿´ ×îºó·¢±í
[¿¼ÑÐ] µ÷¼Á »¯Ñ§ 307 +13 73372112 2026-04-09 14/700 2026-04-10 12:16 by grey499
[¿¼ÑÐ] 071000ÉúÎïѧµ÷¼ÁÇóÖú +15 zzzzwww 2026-04-09 18/900 2026-04-10 12:03 by pengliang8036
[¿¼ÑÐ] 0835ѧ˶299Çóµ÷¼Á 08´óÀà¿É½ÓÊÜ +9 useryy 2026-04-03 9/450 2026-04-10 10:09 by 314126402
[¿¼ÑÐ] Ò»Ö¾Ô¸±±Àí¹¤298Ó¢Ò»Êý¶þÇóµ÷¼Á +8 Reframe 2026-04-10 9/450 2026-04-10 09:59 by lbsjt
[¿¼ÑÐ] ²ÄÁÏר˶(0856) 339·ÖÇóµ÷¼Á +11 ¹þ¹þ¹þ¶ì¹þ¹þ¹þ 2026-04-04 11/550 2026-04-10 09:37 by 690616278
[¿¼ÑÐ] 305Çóµ÷¼Á +4 77Qi 2026-04-07 4/200 2026-04-09 17:27 by wp06
[¿¼ÑÐ] Çóµ÷¼Á²ÄÁÏ¿ÆÑ§Ó빤³ÌÒ»Ö¾Ô¸985³õÊÔ365·Ö +5 ²Ä»¯Àî¿É 2026-04-08 5/250 2026-04-09 17:00 by Lilly_Li
[¿¼ÑÐ] Çó»úеר˶297µÚ¶þÅúµ÷¼Á +5 ʰÆâ12¡£ 2026-04-08 5/250 2026-04-09 16:43 by Ôʵ±ÊʶÈ
[¿¼ÑÐ] 349ѧ¿Æ»¯Ñ§045106Çóµ÷¼Á£¬»¯Ñ§Àà¶¼¿ÉÒÔ +8 ±£ºÃ¶®¶® 2026-04-08 8/400 2026-04-09 14:03 by xulei3024
[¿¼ÑÐ] 086004 Çóµ÷¼Á 309 +7 Yin DY 2026-04-08 7/350 2026-04-09 13:59 by Delta2012
[¿¼ÑÐ] Çóµ÷¼Á +3 ÖíÈâ¶Õ·ÛÌõcc 2026-04-08 4/200 2026-04-09 10:05 by ÖíÈâ¶Õ·ÛÌõcc
[¿¼ÑÐ] 285Çóµ÷¼Á +20 ŶßϺôo 2026-04-04 20/1000 2026-04-08 22:23 by yutian743
[¿¼ÑÐ] ÉúÎïѧ328·ÖÇóµ÷¼Á +9 ÉÁµçkkl 2026-04-08 10/500 2026-04-08 21:42 by liuhuiying09
[¿¼ÑÐ] 318Çóµ÷¼Á +13 ykyhsa 2026-04-05 15/750 2026-04-08 21:37 by wj165256
[¿¼ÑÐ] 283·ÖÇóµ÷¼Á +14 ÊÔÊÔ¿´ß 2026-04-04 14/700 2026-04-08 07:03 by lijunpoly
[¿¼ÑÐ] 081700£¬311£¬Çóµ÷¼Á +17 ¶¬Ê®Èý 2026-04-04 18/900 2026-04-07 12:50 by Sammy2
[¿¼ÑÐ] 287·ÖÇóµ÷¼Á ÓÐרÀû¹ú½±Ò»Ö¾Ô¸¹þ¹¤´ó085406 +6 °×Ò׳½ 2026-04-06 7/350 2026-04-06 22:46 by 875465
[¿¼ÑÐ] 319Çóµ÷¼Á +4 ÐÇÐDz»Õ£ÑÛà¶ 2026-04-03 4/200 2026-04-04 16:25 by ÖзÉÔº¿Õ¹ÜѧԺÑ
[¿¼ÑÐ] Ò»Ö¾Ô¸¶«±±´óѧ085901ÍÁľר˶345Çóµ÷¼Á +3 zxt11111 2026-04-04 3/150 2026-04-04 14:21 by ÍÁľ˶ʿÕÐÉú
[¿¼ÑÐ] µ÷¼Á +5 asdasdassda 2026-04-03 6/300 2026-04-03 20:27 by °¶ÉϵÄÒ»ÌõÓã
ÐÅÏ¢Ìáʾ
ÇëÌî´¦ÀíÒâ¼û