{"id":8593,"date":"2009-03-24T02:22:43","date_gmt":"2009-03-23T19:22:43","guid":{"rendered":"http:\/\/vafs.gov.vn\/vn\/2009\/03\/xay-dung-mo-hinh-day-chuyen-cong-nghe-san-xuat-do-moc-tu-go-bach-dan-va-keo-la-tram\/"},"modified":"2019-09-25T10:17:51","modified_gmt":"2019-09-25T03:17:51","slug":"xay-dung-mo-hinh-day-chuyen-cong-nghe-san-xuat-do-moc-tu-go-bach-dan-va-keo-la-tram","status":"publish","type":"post","link":"https:\/\/vafs.gov.vn\/vn\/xay-dung-mo-hinh-day-chuyen-cong-nghe-san-xuat-do-moc-tu-go-bach-dan-va-keo-la-tram\/","title":{"rendered":"X\u00e2y d\u1ef1ng m\u00f4 h\u00ecnh d\u00e2y chuy\u1ec1n c\u00f4ng ngh\u1ec7 s\u1ea3n xu\u1ea5t \u0111\u1ed3 m\u1ed9c t\u1eeb g\u1ed7 B\u1ea1ch \u0111\u00e0n v\u00e0 Keo l\u00e1 tr\u00e0m"},"content":{"rendered":"<p><strong><em>Tr\u1ea7n Tu\u1ea5n Ngh\u0129a<\/em><\/strong><\/p>\n<p><em>T.t\u00e2m Th\u1ef1c nghi\u1ec7m &amp; Chuy\u1ec3n gia k\u1ef9 thu\u1eadt CNR<\/em><\/p>\n<p><em>Vi\u1ec7n Khoa h\u1ecdc L\u00e2m nghi\u1ec7p Vi\u1ec7t Nam<\/em><\/p>\n<p>G\u1ed7 t\u1eeb r\u1eebng tr\u1ed3ng ng\u00e0y c\u00e0ng \u0111\u01b0\u1ee3c s\u1eed d\u1ee5ng nhi\u1ec1u \u1edf Vi\u1ec7t Nam. Tuy nhi\u00ean, g\u1ed7 t\u1eeb r\u1eebng tr\u1ed3ng th\u01b0\u1eddng l\u00e0 c\u00e1c lo\u00e0i c\u00e2y ph\u00e1t tri\u1ec3n nhanh n\u00ean c\u00f3 nhi\u1ec1u nh\u01b0\u1ee3c \u0111i\u1ec3m v\u1ec1 t\u00ednh ch\u1ea5t c\u01a1 l\u00fd, c\u00f4ng ngh\u1ec7, kh\u00f4ng thu\u1eadn l\u1ee3i cho vi\u1ec7c s\u1ea3n xu\u1ea5t \u0111\u1ed3 m\u1ed9c t\u1eeb g\u1ed7 nguy\u00ean, \u0111\u1eb7c bi\u1ec7t l\u00e0 m\u1ee9c \u0111\u1ed9 co ng\u00f3t, cong v\u00eanh, n\u1ee9t r\u1ea5t l\u1edbn c\u1ee7a ch\u00fang. Vi\u1ec7c nghi\u00ean c\u1ee9u s\u1eed d\u1ee5ng g\u1ed7 r\u1eebng tr\u1ed3ng \u0111\u1ec3 s\u1ea3n xu\u1ea5t \u0111\u1ed3 m\u1ed9c thay th\u1ebf g\u1ed7 r\u1eebng t\u1ef1 nhi\u00ean nh\u1eb1m n\u00e2ng cao gi\u00e1 tr\u1ecb s\u1eed d\u1ee5ng g\u1ed7 r\u1eebng tr\u1ed3ng l\u00e0 m\u1ed9t y\u00eau c\u1ea7u c\u1ea5p b\u00e1ch.<\/p>\n<p>C\u00e1c k\u1ebft qu\u1ea3 \u0111\u00e3 nghi\u00ean c\u1ee9u cho th\u1ea5y r\u1eb1ng nh\u01b0\u1ee3c \u0111i\u1ec3m c\u1ee7a g\u1ed7 r\u1eebng tr\u1ed3ng (ch\u1ee7 y\u1ebfu l\u00e0 b\u1ea1ch \u0111\u00e0n) v\u00e0 bi\u1ec7n ph\u00e1p kh\u1eafc ph\u1ee5c nh\u01b0 sau:<\/p>\n<p>&#8211; Kh\u1ed1i l\u01b0\u1ee3ng th\u1ec3 t\u00edch trong th\u00e2n c\u00e2y g\u1ed7 b\u1ea1ch \u0111\u00e0n r\u1ea5t thi\u1ebfu \u0111\u1ed3ng nh\u1ea5t (t\u1ee9c l\u00e0 m\u1eadt \u0111\u1ed9 c\u00e1c b\u00f3 m\u1ea1ch gi\u1eefa c\u00e1c v\u00f9ng trong th\u00e2n c\u00e2y ch\u00eanh l\u1ec7ch r\u1ea5t l\u1edbn) v\u00e0 kh\u00f4ng theo qui lu\u1eadt. Ch\u00ednh v\u00ec v\u1eady trong qu\u00e1 tr\u00ecnh kh\u00f4 \u0111i (do s\u1ea5y c\u01b0\u1ee1ng b\u1ee9c ho\u1eb7c hong ph\u01a1i t\u1ef1 nhi\u00ean), kh\u00f4ng nh\u1eefng c\u00f3 s\u1ef1 ch\u00eanh l\u1ec7ch \u0111\u1ed9 \u1ea9m gi\u1eefa l\u1edbp ngo\u00e0i v\u00e0 l\u1edbp trong m\u00e0 c\u00f2n c\u00f3 s\u1ef1 ch\u00eanh l\u1ec7ch \u0111\u1ed9 \u1ea9m gi\u1eefa c\u00e1c v\u00f9ng c\u1ee7a m\u1ed9t l\u1edbp g\u1ed7 s\u1ea5y, t\u1ea1o ra \u1ee9ng su\u1ea5t \u1ea9m r\u1ea5t ph\u1ee9c t\u1ea1p. \u0110\u1ec3 kh\u1eafc ph\u1ee5c n\u00f3, c\u1ea7n ti\u1ebfn h\u00e0nh nghi\u00ean c\u1ee9u m\u00f4 h\u00ecnh ho\u00e1 \u0111\u01b0\u1ee3c qui lu\u1eadt ph\u00e2n b\u1ed1 m\u1eadt \u0111\u1ed9 c\u00e1c b\u00f3 m\u1ea1ch trong th\u00e2n c\u00e2y g\u1ed7, t\u1eeb \u0111\u00f3 x\u00e1c \u0111\u1ecbnh s\u01a1 \u0111\u1ed3 x\u1ebb th\u00edch h\u1ee3p. Tr\u01b0\u1edbc m\u1eaft, \u0111\u1ec3 c\u00f3 th\u1ec3 s\u1eed d\u1ee5ng g\u1ed7 r\u1eebng tr\u1ed3ng s\u1ea3n xu\u1ea5t \u0111\u1ed3 m\u1ed9c ch\u00fang t\u00f4i s\u1ebd ti\u1ebfn h\u00e0nh nghi\u00ean c\u1ee9u x\u00e1c \u0111\u1ecbnh ch\u1ebf \u0111\u1ed9 s\u1ea5y, s\u01a1 \u0111\u1ed3 x\u1ebb g\u1ed7 x\u00fac, x\u1ebb v\u00e1n, x\u1ebb thanh th\u00edch h\u1ee3p.<\/p>\n<p>&#8211; Ngo\u00e0i ra, do g\u1ed7 r\u1eebng tr\u1ed3ng t\u0103ng tr\u01b0\u1edfng nhanh n\u00ean lu\u00f4n t\u1ed3n t\u1ea1i \u1ee9ng su\u1ea5t k\u00e9o &#8211; n\u00e9n r\u1ea5t l\u1edbn c\u1ea3 theo ti\u1ebft di\u1ec7n ngang, c\u1ea3 theo chi\u1ec1u d\u1ecdc th\u00e2n c\u00e2y, ch\u00fang t\u00f4i g\u1ecdi n\u00f3 l\u00e0<strong> \u1ee9ng su\u1ea5t sinh tr\u01b0\u1edfng <\/strong>(\u0111\u1ed1i v\u1edbi g\u1ed7 r\u1eebng t\u1ef1 nhi\u00ean, \u1ee9ng su\u1ea5t n\u00e0y nh\u1ecf, kh\u00f4ng \u1ea3nh h\u01b0\u1edfng t\u1edbi t\u00ednh ch\u1ea5t l\u01b0\u1ee3ng g\u1ed7 x\u1ebb). \u0110\u1ec3 kh\u1eafc ph\u1ee5c nh\u01b0\u1ee3c \u0111i\u1ec3m n\u00e0y, ch\u00fang t\u00f4i s\u1ebd ti\u1ebfn h\u00e0nh x\u00e1c \u0111\u1ecbnh qui tr\u00ecnh c\u1eaft kh\u00fac, x\u1ebb th\u00edch h\u1ee3p v\u00e0 ph\u1ea3i k\u1ebft h\u1ee3p v\u1edbi gi\u1ea3i ph\u00e1p c\u01a1 h\u1ecdc.<\/p>\n<p><strong>I. X\u00e1c \u0111\u1ecbnh s\u01a1 \u0111\u1ed3 x\u1ebb<\/strong><\/p>\n<p><strong><em>1. S\u01a1 \u0111\u1ed3 x\u1ebb g\u1ed7 t\u1ea5m<\/em><\/strong><\/p>\n<p>X\u1ebb h\u1ed9p g\u1ed7 th\u00e0nh 3 t\u1ea5m, t\u1ea5m s\u1ed1 1 \u0111i qua t\u00e2m h\u1ed9p g\u1ed7, sao cho t\u1ea5m s\u1ed1 2 v\u00e0 3 \u0111\u1ed1i x\u1ee9ng qua t\u1ea5m s\u1ed1 1 v\u00e0 \u00e5(ai+ s) = A (s\u01a1 \u0111\u1ed3 1a &#8211; ti\u1ebft di\u1ec7n h\u1ed9p g\u1ed7 l\u00e0 1 h\u00ecnh vu\u00f4ng); \u00e5(ai+ s) = B (S\u01a1 \u0111\u1ed3 1b &#8211; Ti\u1ebft di\u1ec7n h\u1ed9p g\u1ed7 l\u00e0 m\u1ed9t h\u00ecnh ch\u1eef nh\u1eadt), s l\u00e0 chi\u1ec1u d\u00e0y m\u1ea1ch x\u1ebb<\/p>\n<table>\n<tbody>\n<tr>\n<td>1<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<table>\n<tbody>\n<tr>\n<td>2<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<table>\n<tbody>\n<tr>\n<td>3<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<table>\n<tbody>\n<tr>\n<td>A<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<table>\n<tbody>\n<tr>\n<td>a)<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<table>\n<tbody>\n<tr>\n<td>2<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<table>\n<tbody>\n<tr>\n<td>A<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<table>\n<tbody>\n<tr>\n<td>b )<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<table>\n<tbody>\n<tr>\n<td>3<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<table>\n<tbody>\n<tr>\n<td>1<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<p><img \/><img \/><\/p>\n<p><strong>S\u01a1 \u0111\u1ed3 1. S\u01a1 \u0111\u1ed3 x\u1ebb t\u1ea5m<\/strong><\/p>\n<p><strong><em>2. S\u01a1 \u0111\u1ed3 x\u1ebb ph\u00f4i<\/em><\/strong><\/p>\n<p>\u0110\u1ed1i v\u1edbi t\u1ea5m g\u1ed7 \u0111i qua t\u00e2m, l\u1eadp s\u01a1 \u0111\u1ed3 x\u1ebb ph\u00f4i g\u1ed7 c\u00f3 chi\u1ec1u d\u00e0y bi (s\u1ebd l\u00e0 chi\u1ec1u r\u1ed9ng c\u1ee7a thanh sau n\u00e0y), \u0111\u1ed1i x\u1ee9ng v\u1edbi nhau qua ph\u00f4i g\u1ed7 \u0111i qua t\u00e2m (s\u01a1 \u0111\u1ed3 2a) v\u00e0 sao cho \u00e5(b\u00ad<sub>i<\/sub> +s) = A.<\/p>\n<p>\u0110\u1ed1i v\u1edbi t\u1ea5m g\u1ed7 s\u1ed1 2 v\u00e0 3 (s\u01a1 \u0111\u1ed3 2b) l\u1eadp s\u01a1 \u0111\u1ed3 x\u1ebb ph\u00f4i g\u1ed7 c\u00f3 chi\u1ec1u d\u00e0y bi sao cho ch\u00fang \u0111\u1ed1i x\u1ee9ng nhau qua ph\u00f4i g\u1ed7 \u1edf gi\u1eefa v\u00e0 \u00e5(b\u00ad<sub>i<\/sub> +s) = A.<\/p>\n<table>\n<tbody>\n<tr>\n<td>a<sub>i<\/sub><\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<table>\n<tbody>\n<tr>\n<td>a<sub>i<\/sub><\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<table>\n<tbody>\n<tr>\n<td>b)<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<table>\n<tbody>\n<tr>\n<td>a)<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<p><img \/><img \/><\/p>\n<p><strong>S\u01a1 \u0111\u1ed3 2. X\u1ebb ph\u00f4i<\/strong><\/p>\n<p><strong><em>3. X\u1ebb thanh<\/em><\/strong><\/p>\n<p>Nguy\u00ean t\u1eafc l\u00e0 t\u1ea1o ra c\u00e1c thanh theo h\u01b0\u1edbng x\u1ebb xuy\u00ean t\u00e2m v\u00e0 xuy\u00ean t\u00e2m &#8211; ti\u1ebfp tuy\u1ebfn, b\u1eb1ng c\u00e1ch:<\/p>\n<p>T\u1eeb c\u00e1c ph\u00f4i g\u1ed7 c\u00f3 chi\u1ec1u r\u1ed9ng ai chi\u1ec1u d\u00e0y bi (s\u01a1 \u0111\u1ed32), x\u1ebb th\u00e0nh c\u00e1c thanh c\u00f3 chi\u1ec1u d\u00e0y Si, s\u1ebd t\u1ea1o ra c\u00e1c thanh c\u00f3 h\u01b0\u1edbng xuy\u00ean t\u00e2m (s\u01a1 \u0111\u1ed3 3a), v\u00e0 c\u00e1c thanh c\u00f3 h\u01b0\u1edbng xuy\u00ean t\u00e2m &#8211; ti\u1ebfp tuy\u1ebfn (s\u01a1 \u0111\u1ed3 3b).<\/p>\n<table>\n<tbody>\n<tr>\n<td>b<sub>i<\/sub><\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<table>\n<tbody>\n<tr>\n<td>b<sub>i<\/sub><\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<table>\n<tbody>\n<tr>\n<td>b<sub>i<\/sub><\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<table>\n<tbody>\n<tr>\n<td>b<sub>i<\/sub><\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<table>\n<tbody>\n<tr>\n<td>a)<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<table>\n<tbody>\n<tr>\n<td>b)<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<p><img \/><img \/><img \/><img \/><\/p>\n<p><strong>S\u01a1 \u0111\u1ed3 3. S\u01a1 \u0111\u1ed3 x\u1ebb thanh<\/strong><\/p>\n<p><strong>II. Ho\u00e0n thi\u1ec7n ch\u1ebf \u0111\u1ed9 s\u1ea5y g\u1ed7 b\u1ea1ch \u0111\u00e0n v\u00e0 keo l\u00e1 tr\u00e0m<\/strong><\/p>\n<p>\u0110\u1ec3 ho\u00e0n thi\u1ec7n ch\u1ebf \u0111\u1ed9 s\u1ea5y g\u1ed7 b\u1ea1ch \u0111\u00e0n v\u00e0 keo l\u00e1 tr\u00e0m, ch\u00fang t\u00f4i d\u1ef1a tr\u00ean c\u00e1c k\u1ebft qu\u1ea3 nghi\u00ean c\u1ee9u c\u1ee7a \u0111\u1ec1 t\u00e0i nghi\u00ean c\u1ee9u c\u1ea5p Nh\u00e0 n\u01b0\u1edbc, m\u00e3 s\u1ed1 KN 03.04 &#8220;Ch\u1ecdn ch\u1ebf \u0111\u1ed9 s\u1ea5y g\u1ed7 b\u1ea1ch \u0111\u00e0n v\u00e0 keo l\u00e1 tr\u00e0m \u0111\u1ec3 s\u1ea3n xu\u1ea5t v\u00e1n gh\u00e9p thanh v\u00e0 m\u1ed9c x\u00e2y d\u1ef1ng&#8221; v\u00e0 b\u1ed1 tr\u00ed c\u00e1c m\u1ebb s\u1ea5y th\u00ed nghi\u1ec7m theo s\u01a1 \u0111\u1ed3 2<sup>K<\/sup> (trong \u0111\u00f3 s\u1ed1 2 l\u00e0 2 m\u1ee9c t\u0103ng gi\u1ea3m, k l\u00e0 c\u00e1c nh\u00e2n t\u1ed1 c\u1ea7n t\u00e1c \u0111\u1ed9ng).<\/p>\n<p>Ch\u1ebf \u0111\u1ed9 s\u1ea5y g\u1ed7 b\u1ea1ch \u0111\u00e0n v\u00e0 keo l\u00e1 tr\u00e0m g\u1ed3m 4 t\u00e1c nh\u00e2n c\u1ea7n t\u00e1c \u0111\u1ed9ng: Nhi\u1ec7t \u0111\u1ed9 s\u1ea5y, \u0111\u1ed9 \u1ea9m m\u00f4i tr\u01b0\u1eddng s\u1ea5y, th\u1eddi gian x\u1eed l\u00fd nhi\u1ec7t v\u00e0 l\u1ef1c n\u00e9n g\u1ed7. V\u00ec ch\u01b0a c\u00f3 \u0111i\u1ec1u ki\u1ec7n n\u00ean l\u1ef1c n\u00e9n g\u1ed7 ch\u01b0a th\u1ec3 thay \u0111\u1ed5i (ch\u1ecdn const). Nh\u01b0 v\u1eady c\u00e1c t\u00e1c nh\u00e2n c\u1ea7n \u0111i\u1ec1u ch\u1ec9nh ch\u1ec9 g\u1ed3m:<\/p>\n<table>\n<tbody>\n<tr>\n<td>Max<\/td>\n<td>Min<\/td>\n<td>M\u1ee9c 0<\/td>\n<\/tr>\n<tr>\n<td>&#8211; Nhi\u1ec7t \u0111\u1ed9 s\u1ea5y (x<sub>1<\/sub>): <sup>0<\/sup>C<\/td>\n<td>75<\/td>\n<td>60<\/td>\n<td>65<\/td>\n<\/tr>\n<tr>\n<td>&#8211; \u0110\u1ed9 \u1ea9m m\u00f4i tr\u01b0\u1eddng s\u1ea5y (x<sub>2<\/sub>): %<\/td>\n<td>35<\/td>\n<td>28<\/td>\n<td>30<\/td>\n<\/tr>\n<tr>\n<td>&#8211; Th\u1eddi gian s\u1eed l\u00fd nhi\u1ec7t (x<sub>3<\/sub>): h<\/td>\n<td>72<\/td>\n<td>48<\/td>\n<td>60<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<p>Theo b\u1ea3ng ma tr\u1eadn, qui ho\u1ea1ch th\u00ed nghi\u1ec7m 2<sup>k<\/sup>, ch\u00fang t\u00f4i ti\u1ebfn h\u00e0nh 2 seri s\u1ea5y (m\u1ed7i seri 9 m\u1ebb s\u1ea5y) v\u00e0 x\u00e1c \u0111\u1ecbnh \u0111\u01b0\u1ee3c m\u1ebb s\u1ea5y N<sup>0<\/sup> s\u1ed1 kh\u00f4ng, \u0111\u1ea1t \u0111\u01b0\u1ee3c ch\u1ea5t l\u01b0\u1ee3ng g\u1ed7 s\u1ea5y theo ti\u00eau chu\u1ea9n, ti\u1ebfn h\u00e0nh 3 m\u1ebb s\u1ea5y theo ch\u1ebf \u0111\u1ed9 s\u1ea5y n\u00e0y v\u00e0 x\u00e1c \u0111\u1ecbnh \u0111\u01b0\u1ee3c ch\u1ebf \u0111\u1ed9 s\u1ea5y h\u1ee3p l\u00fd<\/p>\n<p><em>B\u1ea3ng 1. Ch\u1ebf \u0111\u1ed9 s\u1ea5y g\u1ed7 b\u1ea1ch \u0111\u00e0n v\u00e0 keo l\u00e1 tr\u00e0m<\/em><\/p>\n<table>\n<tbody>\n<tr>\n<td>STT<\/td>\n<td>Giai \u0111o\u1ea1n s\u1ea5y<\/td>\n<td>t<sup>0<\/sup>C<\/td>\n<td>j%<\/td>\n<td>z(h)<\/td>\n<\/tr>\n<tr>\n<td>1<\/p>\n<p>2<\/p>\n<p>3<\/p>\n<p>4<\/p>\n<p>5<\/p>\n<p>6<\/td>\n<td>X\u1eed l\u00fd nhi\u1ec7t \u0111\u1ed9<\/p>\n<p>W \u00ae30%<\/p>\n<p>W = 30 &#8211; 20%<\/p>\n<p>W = 20 &#8211; 10%<\/p>\n<p>W &lt; 10%<\/p>\n<p>X\u1eed l\u00fd nhi\u1ec7t \u1ea9m<\/td>\n<td>70<\/p>\n<p>60<\/p>\n<p>62<\/p>\n<p>62<\/p>\n<p>65<\/p>\n<p>70<\/td>\n<td>\u00b385<\/p>\n<p>60<\/p>\n<p>50<\/p>\n<p>40<\/p>\n<p>30<\/p>\n<p>\u00b365<\/td>\n<td>72<\/p>\n<p>72<\/p>\n<p>48<\/p>\n<p>48<\/p>\n<p>36<\/p>\n<p>12<\/td>\n<\/tr>\n<tr>\n<td><\/td>\n<td>T\u1ed5ng c\u1ed9ng<\/td>\n<td>288<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<p>Ch\u1ea5t l\u01b0\u1ee3ng g\u1ed7 s\u1ea5y \u0111\u1ea1t theo ti\u00eau chu\u1ea9n GOCT 664 &#8211; 63 (LX) v\u00e0 c\u00f3 th\u1ec3 s\u1eed d\u1ee5ng \u0111\u1ec3 s\u1ea3n xu\u1ea5t \u0111\u1ed3 m\u1ed9c gia d\u1ee5ng, m\u1ed9c ngo\u00e0i tr\u1eddi.<\/p>\n<p><strong>III. X\u00e1c \u0111\u1ecbnh c\u00f4ng ngh\u1ec7 s\u1ea3n xu\u1ea5t v\u00e1n gh\u00e9p thanh t\u1eeb g\u1ed7 b\u1ea1ch \u0111\u00e0n v\u00e0 keo l\u00e1 tr\u00e0m<\/strong><\/p>\n<p>&#8211; C\u00e1c thanh x\u1ebb t\u1eeb ph\u00f4i (s\u01a1 \u0111\u1ed3 3) \u0111\u01b0\u1ee3c gia c\u00f4ng chu\u1ea9n x\u00e1c v\u1ec1 k\u00edch th\u01b0\u1edbc v\u00e0 \u0111\u1ed9 nh\u1eb5n b\u1ec1 m\u1eb7t, \u0111\u01b0\u1ee3c qu\u00e9t keo (UF, d\u00e1n ngu\u1ed9i), gh\u00e9p v\u1edbi nhau kh\u00f4ng c\u00f3 m\u1ed9ng n\u1ed1i, \u0111\u1ec3 t\u1ea1o v\u00e1n gh\u00e9p thanh kh\u1ed5 r\u1ed9ng g\u1ed3m c\u00e1c thanh x\u1ebb theo h\u01b0\u1edbng xuy\u00ean t\u00e2m (s\u01a1 \u0111\u1ed3 4a) v\u00e0 c\u00e1c thanh x\u1ebb theo h\u01b0\u1edbng xuy\u00ean t\u00e2m &#8211; ti\u1ebfp tuy\u1ebfn (s\u01a1 \u0111\u1ed3 4b).<\/p>\n<table>\n<tbody>\n<tr>\n<td>b<sub>i<\/sub><\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<table>\n<tbody>\n<tr>\n<td>b<sub>i<\/sub><\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<table>\n<tbody>\n<tr>\n<td>b<sub>i<\/sub><\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<table>\n<tbody>\n<tr>\n<td>b<sub>i<\/sub><\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<table>\n<tbody>\n<tr>\n<td>b<sub>i<\/sub><\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<table>\n<tbody>\n<tr>\n<td>b<sub>i<\/sub><\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<table>\n<tbody>\n<tr>\n<td>a)<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<table>\n<tbody>\n<tr>\n<td>b)<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<p><img \/><img \/><\/p>\n<p><strong>S\u01a1 \u0111\u1ed3 4. S\u01a1 \u0111\u1ed3 x\u1ebb thanh <\/strong><\/p>\n<p>&#8211; C\u00e1c thanh \u0111\u01b0\u1ee3c gh\u00e9p v\u1edbi nhau t\u1ea1o g\u1ed7 \u00e9p c\u1ea5u ki\u1ec7n l\u1edbn g\u1ed3m c\u00e1c thanh x\u1ebb theo h\u01b0\u1edbng xuy\u00ean t\u00e2m (s\u01a1 \u0111\u1ed3 5a) v\u00e0 c\u00e1c thanh x\u1ebb theo h\u01b0\u1edbng xuy\u00ean t\u00e2m &#8211; ti\u1ebfp tuy\u1ebfn (s\u01a1 \u0111\u1ed3 5b)<\/p>\n<table>\n<tbody>\n<tr>\n<td>b<sub>i<\/sub><\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<table>\n<tbody>\n<tr>\n<td>s<sub>i<\/sub><\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<table>\n<tbody>\n<tr>\n<td>s<sub>i<\/sub><\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<table>\n<tbody>\n<tr>\n<td>s<sub>i<\/sub><\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<table>\n<tbody>\n<tr>\n<td>b<sub>i<\/sub><\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<table>\n<tbody>\n<tr>\n<td>s<sub>i<\/sub><\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<table>\n<tbody>\n<tr>\n<td>s<sub>i<\/sub><\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<table>\n<tbody>\n<tr>\n<td>s<sub>i<\/sub><\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<table>\n<tbody>\n<tr>\n<td>a)<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<table>\n<tbody>\n<tr>\n<td>b)<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<p><img \/><img \/><\/p>\n<p><strong>S\u01a1 \u0111\u1ed3 5. V\u00e1n gh\u00e9p thanh c\u1ea5u ki\u1ec7n l\u1edbn<\/strong><\/p>\n<p>V\u00e1n gh\u00e9p thanh kh\u00f4ng s\u1eed d\u1ee5ng v\u1eadt li\u1ec7u d\u00e1n m\u1eb7t, sau khi ho\u00e0n thi\u1ec7n, b\u1ec1 m\u1eb7t s\u1ebd ph\u1ee7 b\u1eb1ng nh\u1ef1a PU. V\u00e1n gh\u00e9p thanh \u0111\u01b0\u1ee3c t\u1ea1o theo k\u00edch th\u01b0\u1edbc c\u1ee7a s\u1ea3n ph\u1ea9m m\u1ed9c (v\u00e1n gh\u00e9p thanh \u0111\u1ecbnh h\u00ecnh) c\u00f3 khung ho\u1eb7c kh\u00f4ng c\u00f3 khung.<\/p>\n<p>V\u00e1n gh\u00e9p thanh \u0111\u01b0\u1ee3c t\u1ea1o ra t\u1eeb g\u1ed7 b\u1ea1ch \u0111\u00e0n v\u00e0 keo l\u00e1 tr\u00e0m c\u00f3 b\u1ec1 m\u1eb7t \u0111\u1eb9p, m\u1ee9c cong v\u00eanh \u0111\u1ea1t ti\u00eau chu\u1ea9n \u0111\u1ec3 s\u1ea3n xu\u1ea5t \u0111\u1ed3 m\u1ed9c.<\/p>\n<p><strong>IV. K\u1ebft lu\u1eadn v\u00e0 ki\u1ebfn ngh\u1ecb<\/strong><\/p>\n<p>M\u00f4 h\u00ecnh d\u00e2y chuy\u1ec1n thi\u1ebft b\u1ecb s\u1ea3n xu\u1ea5t \u0111\u1ed3 m\u1ed9c t\u1eeb g\u1ed7 b\u1ea1ch \u0111\u00e0n v\u00e0 keo l\u00e1 tr\u00e0m \u0111\u00e3 \u0111\u01b0\u1ee3c thi\u1ebft l\u1eadp. M\u1ed9t s\u1ed1 s\u1ea3n ph\u1ea9m m\u1ed9c gia d\u1ee5ng nh\u01b0 t\u1ee7 h\u1ed3 s\u01a1, b\u00e0n qu\u1ea7y, gi\u01b0\u1eddng, t\u1ee7 t\u01b0\u1eddng, t\u1ee7 b\u1ebfp &#8230; \u0111\u00e3 \u0111\u01b0\u1ee3c ti\u1ebfn h\u00e0nh s\u1ea3n xu\u1ea5t th\u1eed v\u00e0 \u0111\u01b0a v\u00e0o th\u1ecb tr\u01b0\u1eddng ti\u00eau th\u1ee5 th\u0103m d\u00f2 \u0111\u01b0\u1ee3c ng\u01b0\u1eddi ti\u00eau d\u00f9ng \u0111\u00e1nh gi\u00e1 cao v\u1ec1 m\u1eabu m\u00e3 v\u00e0 ch\u1ea5t l\u01b0\u1ee3ng. \u0110\u1eb7c bi\u1ec7t \u0111\u00e3 xu\u1ea5t kh\u1ea9u sang th\u1ecb tr\u01b0\u1eddng B\u1eafc \u00c2u \u0111\u01b0\u1ee3c 25m<sup>3<\/sup> chi ti\u1ebft s\u1ea3n ph\u1ea9m m\u1ed9c ngo\u00e0i tr\u1eddi.<\/p>\n<p>M\u1ed9t s\u1ed1 k\u1ebft qu\u1ea3 c\u1ee7a \u0111\u1ec1 t\u00e0i trong vi\u1ec7c nghi\u00ean c\u1ee9u s\u1eed d\u1ee5ng g\u1ed7 b\u1ea1ch \u0111\u00e0n v\u00e0 keo l\u00e1 tr\u00e0m \u0111\u1ec3 s\u1ea3n xu\u1ea5t \u0111\u1ed3 m\u1ed9c \u0111\u00e3 \u0111\u01b0\u1ee3c c\u00e1c chuy\u00ean gia ch\u1ebf bi\u1ebfn g\u1ed7 r\u1eebng tr\u1ed3ng CSIRO (\u00fac) quan t\u00e2m v\u00e0 nh\u1ea5t tr\u00ed v\u1edbi ch\u00fang t\u00f4i r\u1eb1ng: X\u1ebb v\u00e0 s\u1ea5y l\u00e0 c\u00f4ng vi\u1ec7c c\u1ed1t l\u00f5i \u0111\u1ec3 n\u00e2ng cao gi\u00e1 tr\u1ecb s\u1eed d\u1ee5ng g\u1ed7 r\u1eebng tr\u1ed3ng.<\/p>\n<p>G\u1ed7 b\u1ea1ch \u0111\u00e0n v\u00e0 keo l\u00e1 tr\u00e0m khi \u0111\u01b0\u1ee3c x\u1ebb v\u00e0 s\u1ea5y h\u1ee3p l\u00fd \u0111\u1ea1t \u0111\u01b0\u1ee3c ti\u00eau chu\u1ea9n \u0111\u1ec3 s\u1ea3n xu\u1ea5t \u0111\u1ed3 m\u1ed9c gia d\u1ee5ng, m\u1ed9c ngo\u00e0i tr\u1eddi. K\u1ebft lu\u1eadn n\u00e0y c\u0169ng tr\u00f9ng v\u1edbi c\u00e1c k\u1ebft qu\u1ea3 m\u00e0 c\u00f4ng ty T\u01b0 v\u1ea5n l\u00e2m nghi\u1ec7p SILVINOVA (Thu\u1ef5 \u0110i\u1ec3n) gi\u1edbi thi\u1ec7u sau khi ti\u1ebfn h\u00e0nh x\u00e2y d\u1ef1ng th\u1eed nghi\u1ec7m d\u00e2y chuy\u1ec1n x\u1ebb &#8211; s\u1ea5y g\u1ed7 b\u1ea1ch \u0111\u00e0n t\u1ea1i Vi\u00ean Ch\u0103n (L\u00e0o).<\/p>\n<p>\u0110\u00e2y l\u00e0 m\u1ed9t s\u1ed1 k\u1ebft qu\u1ea3 nghi\u00ean c\u1ee9u b\u01b0\u1edbc \u0111\u1ea7u c\u1ea7n \u0111\u01b0\u1ee3c \u0111\u1ea7u t\u01b0 nghi\u00ean c\u1ee9u m\u1edf r\u1ed9ng \u0111\u1ec3 ho\u00e0n thi\u1ec7n c\u00f4ng ngh\u1ec7, s\u1edbm \u0111\u01b0a v\u00e0o \u00e1p d\u1ee5ng trong s\u1ea3n xu\u1ea5t.<\/p>\n<p><strong>T\u00e0i li\u1ec7u tham kh\u1ea3o<\/strong><\/p>\n<p>1. Nguy\u1ec5n Tr\u1ecdng Nh\u00e2n, 1997. Nghi\u00ean c\u1ee9u x\u00e1c \u0111\u1ecbnh c\u00f4ng ngh\u1ec7 s\u1ea3n xu\u1ea5t v\u00e1n gh\u00e9p thanh t\u1eeb g\u1ed7 keo l\u00e1 tr\u00e0m. \u0110\u1ec1 t\u00e0i c\u1ea5p Ng\u00e0nh &#8211; H\u00e0 N\u1ed9i.<\/p>\n<p>2. Ph\u1ea1m V\u0103n Ch\u01b0\u01a1ng, 2000.Nghi\u00ean c\u1ee9u m\u1ed9t s\u1ed1 y\u1ebfu t\u1ed1 c\u00f4ng ngh\u1ec7 s\u1ea3n xu\u1ea5t v\u00e1n gh\u00e9p thanh t\u1eeb g\u1ed7 keo tai t\u01b0\u1ee3ng. Lu\u1eadn v\u0103n ti\u1ebfn s\u0129 -H\u00e0 N\u1ed9i.<\/p>\n<p>3. Tr\u1ea7n Tu\u1ea5n Ngh\u0129a, 1993.Thi\u1ebft k\u1ebf c\u1ea3i ti\u1ebfn l\u00f2 s\u1ea5y g\u1ed7 \u0111ang s\u1eed d\u1ee5ng qui m\u00f4 nh\u1ecf \u0111\u1ec3 s\u1ea5y m\u1ed9t s\u1ed1 lo\u00e0i g\u1ed7 r\u1eebng tr\u1ed3ng. \u0110\u1ec1 t\u00e0i c\u1ea5p Ng\u00e0nh.<\/p>\n<p>4. Tr\u1ea7n Tu\u1ea5n Ngh\u0129a. Nghi\u00ean c\u1ee9u x\u00e1c \u0111\u1ecbnh s\u01a1 \u0111\u1ed3 c\u1eaft kh\u00fac &#8211; x\u1ebb v\u00e0 ch\u1ebf \u0111\u1ed9 s\u1ea5y h\u1ee3p l\u00fd g\u1ed7 b\u1ea1ch \u0111\u00e0n v\u00e0 keo l\u00e1 tr\u00e0m \u0111\u1ec3 s\u1ea3n xu\u1ea5t \u0111\u1ed3 m\u1ed9c gia d\u1ee5ng v\u00e0 m\u1ed9c x\u00e2y d\u1ef1ng. \u0110\u1ec1 m\u1ee5c c\u1ee7a \u0110\u1ec1 t\u00e0i c\u1ea5p Nh\u00e0 n\u01b0\u1edbc, m\u00e3 s\u1ed1 KNO3-04.<\/p>\n<p><strong><em>Summary:<\/em><\/strong>The research subject deals with the establishment on model of equipment lines and technology for producing furniture from Eucalypts and Acacias. The problems are as follows:<\/p>\n<p>&#8211; To define suitable regular drying &#8211; diagram sawing Eucalypt and Acacia wood and to establish the appropriate technology for making blockboard from Eucalypts and Acacias.<\/p>\n<p>&#8211; To propose the Project of design to improve the equipment lines for producing furniture and outdoor furniture from Eucalypts and Acacias with small scale.<\/p>\n<p>*******************************************<\/p>\n","protected":false},"excerpt":{"rendered":"<p>G\u1ed7 t\u1eeb r\u1eebng tr\u1ed3ng ng&agrave;y c&agrave;ng \u0111\u01b0\u1ee3c s\u1eed d\u1ee5ng nhi\u1ec1u \u1edf Vi\u1ec7t Nam. Tuy nhi&ecirc;n, g\u1ed7 t\u1eeb r\u1eebng tr\u1ed3ng th\u01b0\u1eddng l&agrave; c&aacute;c lo&agrave;i c&acirc;y ph&aacute;t tri\u1ec3n nhanh n&ecirc;n c&oacute; nhi\u1ec1u nh\u01b0\u1ee3c \u0111i\u1ec3m v\u1ec1 t&iacute;nh ch\u1ea5t c\u01a1 l&yacute;, c&ocirc;ng ngh\u1ec7, kh&ocirc;ng thu\u1eadn l\u1ee3i cho vi\u1ec7c s\u1ea3n xu\u1ea5t \u0111\u1ed3 m\u1ed9c t\u1eeb g\u1ed7 nguy&ecirc;n, \u0111\u1eb7c bi\u1ec7t l&agrave; m\u1ee9c \u0111\u1ed9 co ng&oacute;t, cong v&ecirc;nh, n\u1ee9t r\u1ea5t l\u1edbn c\u1ee7a ch&uacute;ng. Vi\u1ec7c nghi&ecirc;n c\u1ee9u s\u1eed d\u1ee5ng g\u1ed7 r\u1eebng tr\u1ed3ng \u0111\u1ec3 s\u1ea3n xu\u1ea5t \u0111\u1ed3 m\u1ed9c thay th\u1ebf g\u1ed7 r\u1eebng t\u1ef1 nhi&ecirc;n nh\u1eb1m n&acirc;ng cao gi&aacute; tr\u1ecb s\u1eed d\u1ee5ng g\u1ed7 r\u1eebng tr\u1ed3ng l&agrave; m\u1ed9t y&ecirc;u c\u1ea7u c\u1ea5p b&aacute;ch. <\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":[],"categories":[18],"tags":[],"_links":{"self":[{"href":"https:\/\/vafs.gov.vn\/vn\/wp-json\/wp\/v2\/posts\/8593"}],"collection":[{"href":"https:\/\/vafs.gov.vn\/vn\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/vafs.gov.vn\/vn\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/vafs.gov.vn\/vn\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/vafs.gov.vn\/vn\/wp-json\/wp\/v2\/comments?post=8593"}],"version-history":[{"count":2,"href":"https:\/\/vafs.gov.vn\/vn\/wp-json\/wp\/v2\/posts\/8593\/revisions"}],"predecessor-version":[{"id":19308,"href":"https:\/\/vafs.gov.vn\/vn\/wp-json\/wp\/v2\/posts\/8593\/revisions\/19308"}],"wp:attachment":[{"href":"https:\/\/vafs.gov.vn\/vn\/wp-json\/wp\/v2\/media?parent=8593"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/vafs.gov.vn\/vn\/wp-json\/wp\/v2\/categories?post=8593"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/vafs.gov.vn\/vn\/wp-json\/wp\/v2\/tags?post=8593"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}