24小时热门版块排行榜

>论坛更新日志 (3743)
>导师招生 (632)
>文献求助 (169)
>考博 (167)
>虫友互识 (148)
>博后之家 (107)
>微米和纳米 (91)
>硕博家园 (50)
>论文投稿 (50)
>学术会议 (48)
>休闲灌水 (48)
>公派出国 (43)
>教师之家 (39)
>考研 (32)
>招聘信息布告栏 (21)
>基金申请 (20)

返回列表

yexuqing

木虫之王 (文学泰斗)

太阳系系主任

应助: 11 (小学生)
金币: 203585
散金: 5
红花: 133
沙发: 787
帖子: 170674
在线: 5248.8小时
虫号: 88288
注册: 2005-08-23
专业: 数论

[交流] 溫室用膜與其隔熱性能

????????c????????? 2012/9/7
[ ?? ?? ?? ? | ?? ?] ?? ?? ]

?F?М???????????????N???c????
??|???????????????(Glass)??????????(Acrylic)???????????(PC)????|???????τt??????????(PE)??????????(PVC)?????????????????(EVA)??????N?(PO)?????z????????|?????????|???^???????Y???^??????????^??????M?b?^?M?????????????c?S?o?????????????|?????????|???^?p?????b?????????????O?ó???????????Y???????????^????????z?????????????????????????????Q??

????????????????
????????????????????????????????????????????????????T?l???N???????????????????????m?r?g?L?5 ??????????????????????h????????????????????????_??18 ?????????12 ?????????m?????m??????????????????????????????????m?У??????Y?????a????Cе???|?????????????????????????????????????????0.10~0.15 mm ???????S??(U)С?7 W/m2??K????h??????????????????o?к????w???簱?????????]?l???к????|??????
1. ????????
???????????L??(Photoperiodic)?c???V????????B(Morphogenesis)?c???????(Photosynthesis)??????????L???????????????D??????????????????_???????????????L???λ?280~3,000 nm ????????У?280~380 nm ??????? 380~780 nm ?????? 780~3,000 nm ??t????????????400~700 nm ???L?????????????й??????????(Photosynthesis Active Radiation; PAR)???????~?G??(Chlorophyll)????????????V?????{???(400~480 nm)??t???^(600~680 nm)??????????L????

?D????????V?c??????L???P?D

2. ??????????W???????
(1)???????????
????????????????????????????L??????????????????^???????????????^?????????????????????????90% ????????r??????1??????????????80% ????????2 ???????????????????60% ???????|??????r?????????????????@?N????????L????S????80% ??????r??????????????^????x???????????????c????^????????????麮????^??1.5????????????^????????????????????e?????????????????????K???????L??
(4)?m??????????????
??????^???????????L?????????????????p??????t?????????????????????????????Щ????????L?^???????m???????????^??

?F?и???????g
???????????a????y????R?????????m??????Ч??????N?????????О???????????c??????R僷??u????????????5 ????????u????}??????^????????????^?????????_?l?????????????????T??????u????????????????????Ч???c?y??????????????е??????????????????????????_?l?????????c???????z?u???????ЙC?o?C???T???????ˉT?ωT??????????棬?γ?????????????

???????????????T???????????????r????t????????_????????????Ч?????u??????????W???|?c??????w?????е????????P?????????????????w??????S????60~80% ???t?????^???_78~98% ???c???????????????W???????^???????????????W?????????????????????u????y???z?y?????????????????????y?????????????????????????y???D????????c???????^????y??l????????????????????15??C ??????c?????????????Ч????????? ???σ???????c????????????????

?D???????????????????y?????D?c?y???

??????R???????R???? / ??????????
????????????I?????s?I309??????????Y??????http://www.materialsnet.com.tw/DocView.aspx?id=10574

回复此楼