查询词典 trammel net

The number of fishing boat from 1999 to 2002 is 159 , 100 , 107 and 116 , respectively . the number of different fishing boat and the species composition of different fishing gears were calculated also . furthermore , the structure of drift trammel net , set longline of baited hooks and jig and their fishing methods were described

- 2002年各年的作业渔船数分别为159只， 100只， 107只和116只，并统计了各年使用不同渔具的渔船数目以及不同渔具的渔获物种类，另外还对三层流刺网、饵钓和滚钩等主要渔具的结构和渔法进行了描述。

Gymnocranius griseus was the decisive fishing target by trammel net in the adjacent water area of Nansha Islands and reefs. From the view point of food web, it should be strengthened for fishing the enemy fish and competitor of G.griseus , in order to remove the enemies of low class carnivorous commercial fish, thus the biomass of G.griseus may increase.

灰裸顶鲷是南沙岛礁周围水域三重剌网举足轻重的捕捞对象，从食物网的观点出发，应加强灰裸顶鲷幼鱼期敌害鱼和其竞食者的捕捞，为低级肉食性经济鱼类除害，灰裸顶鲷就有可能增加资源量。

Furthermore, the structure of drift trammel net, set longline of baited hooks and jig and their fishing methods were described.(2)The fishing gears in Hejiang section were divided into drift trammel net, set longline and jig according to the fishery status in Hejiang section."Number of fishing boat day" was selected as the unit of fishing effort.

2根据合江江段的渔业现状，将该江段的渔具分为三层流刺网、饵钓、滚钩和其它偶见渔具四类，以"船·天"作为捕捞努力量的单位，用单位捕捞努力量渔获量乘以年捕捞努力量分别得到这四类渔具的年渔获量，并将这四类渔具的年渔获量相加估算出合江江段1999-2002年的渔获量分别为104563.464kg、65564.231kg、123684.966kg和107285.272kg。

Furthermore, the structure of drift trammel net, set longline of baited hooks and jig and their fishing methods were described.(2)The fishing gears in Hejiang section were divided into drift trammel net, set longline and jig according to the fishery status in Hejiang section."Number of fishing boat day" was selected as the unit of fishing effort.

2根据合江江段的渔业现状，将该江段的渔具分为三层流刺网、饵钓、滚钩和其它偶见渔具四类，以&船·天&作为捕捞努力量的单位，用单位捕捞努力量渔获量乘以年捕捞努力量分别得到这四类渔具的年渔获量，并将这四类渔具的年渔获量相加估算出合江江段1999-2002年的渔获量分别为104563.464kg、65564.231kg、123684.966kg和107285.272kg。

The absorption and distribution of chromium were studied in ryeusing nutrient culture technique and pot experiment.

采用不同浓度K2CrO4(0，0.4，0.8和1.2 mmol/L)的Hoagland营养液处理黑麦幼苗，测定铬在黑麦体内的亚细胞分布、铬化学形态及不同部位的积累。

By analyzing theory foundation of mathematical morphology in the digital image processing, researching morphology arithmetic of the binary Image, discussing two basic forms for the least structure element: dilation and erosion.

通过分析数学形态学在图像中的理论基础，研究二值图像的形态分析算法，探讨最小结构元素的两种基本形态：膨胀和腐蚀；分析了数学形态学复杂算法的基本原理，把数学形态学的部分并行处理理念引入到家实际应用中。