Holding temperature and holding thickness are main parameters for two-phase controlled rolling on plate mill. The optimization of holding temperature and holding thickness for pass schedule calculation of two-phase co...Holding temperature and holding thickness are main parameters for two-phase controlled rolling on plate mill. The optimization of holding temperature and holding thickness for pass schedule calculation of two-phase controlled rolling on plate mill was presented and its feature is as follows： （1） Determination of holding thickness can be automatically obtained based on the influence of mill safety limits, tracking zone length and holding time on holding thickness; （2） Determination of holding temperature can be automatically obtained and the holding time can be reduced as much as possible; （3） Algorithm can modify the holding temperature and thickness depending on slab size and product size.展开更多
采用室内测定并结合林间实地调查的方法,研究了新发现的寄生于蛀干害虫白蜡窄吉丁的外寄生蜂——白蜡吉丁肿腿蜂Sclerodermus pupariae Yang et Yao的生物学特性及其人工繁殖技术。结果表明,白蜡吉丁肿腿蜂外寄生于白蜡窄吉丁的幼虫和...采用室内测定并结合林间实地调查的方法,研究了新发现的寄生于蛀干害虫白蜡窄吉丁的外寄生蜂——白蜡吉丁肿腿蜂Sclerodermus pupariae Yang et Yao的生物学特性及其人工繁殖技术。结果表明,白蜡吉丁肿腿蜂外寄生于白蜡窄吉丁的幼虫和蛹及预蛹,是自然控制该害虫的一种重要寄生蜂,自然寄生率为13.9%左右。该蜂在天津1年发生5代,世代重叠明显,寿命长。白蜡吉丁肿腿蜂的卵、幼虫、茧蛹期和全世代的发育起点温度分别为(16.89±0.79)℃,(17.03±1.42)℃,(16.90±1.68)℃和(15.31±0.47)℃。有效积温分别为(33.82±4.13)日.度、(49.11±7.93)日.度、(128.88±27.87)日.度和(277.00±14.15)日.度。雌性成蜂易于低温保存,对寄主有较强的搜索力和攻击力。繁蜂寄主容易大量获得,是生物防治白蜡窄吉丁的重要理想天敌之一。展开更多
Through experiment, the effective accumulated temperature and the threshold temperature for development of \%Chouioia cunea\% Yang (Hymenoptera:Eulophidae), a powerful pupa endoparasitoid of the intruded insect pest-f...Through experiment, the effective accumulated temperature and the threshold temperature for development of \%Chouioia cunea\% Yang (Hymenoptera:Eulophidae), a powerful pupa endoparasitoid of the intruded insect pest-fall webworm, \%Hyphantria cunea\% Drury (Lepidoptera:Arctiidae), are 365.12 degree\|day and 6.14℃, respectively. Meanwhile, the curve diagram of functional relationship between theoretical development duration and temperature is given. These data are important in mass\|rearing the wasp for biological control of the pest.展开更多
白蛾黑棒啮小蜂Tetrastichus septentrionalis Yang是美国白蛾等多种鳞翅目食叶害虫蛹期的重要寄生性天敌,具有很好的利用前景。为了人工大规模繁殖以应用于生物防治,对该小蜂的发育起点温度和有效积温进行了研究,得出白蛾黑棒啮小蜂的...白蛾黑棒啮小蜂Tetrastichus septentrionalis Yang是美国白蛾等多种鳞翅目食叶害虫蛹期的重要寄生性天敌,具有很好的利用前景。为了人工大规模繁殖以应用于生物防治,对该小蜂的发育起点温度和有效积温进行了研究,得出白蛾黑棒啮小蜂的发育起点温度和有效积温分别为8.63℃和334.14日度,为指导室内人工大量繁殖白蛾黑棒啮小蜂打下了基础。展开更多
文摘Holding temperature and holding thickness are main parameters for two-phase controlled rolling on plate mill. The optimization of holding temperature and holding thickness for pass schedule calculation of two-phase controlled rolling on plate mill was presented and its feature is as follows： （1） Determination of holding thickness can be automatically obtained based on the influence of mill safety limits, tracking zone length and holding time on holding thickness; （2） Determination of holding temperature can be automatically obtained and the holding time can be reduced as much as possible; （3） Algorithm can modify the holding temperature and thickness depending on slab size and product size.
文摘采用室内测定并结合林间实地调查的方法,研究了新发现的寄生于蛀干害虫白蜡窄吉丁的外寄生蜂——白蜡吉丁肿腿蜂Sclerodermus pupariae Yang et Yao的生物学特性及其人工繁殖技术。结果表明,白蜡吉丁肿腿蜂外寄生于白蜡窄吉丁的幼虫和蛹及预蛹,是自然控制该害虫的一种重要寄生蜂,自然寄生率为13.9%左右。该蜂在天津1年发生5代,世代重叠明显,寿命长。白蜡吉丁肿腿蜂的卵、幼虫、茧蛹期和全世代的发育起点温度分别为(16.89±0.79)℃,(17.03±1.42)℃,(16.90±1.68)℃和(15.31±0.47)℃。有效积温分别为(33.82±4.13)日.度、(49.11±7.93)日.度、(128.88±27.87)日.度和(277.00±14.15)日.度。雌性成蜂易于低温保存,对寄主有较强的搜索力和攻击力。繁蜂寄主容易大量获得,是生物防治白蜡窄吉丁的重要理想天敌之一。
文摘Through experiment, the effective accumulated temperature and the threshold temperature for development of \%Chouioia cunea\% Yang (Hymenoptera:Eulophidae), a powerful pupa endoparasitoid of the intruded insect pest-fall webworm, \%Hyphantria cunea\% Drury (Lepidoptera:Arctiidae), are 365.12 degree\|day and 6.14℃, respectively. Meanwhile, the curve diagram of functional relationship between theoretical development duration and temperature is given. These data are important in mass\|rearing the wasp for biological control of the pest.
文摘白蛾黑棒啮小蜂Tetrastichus septentrionalis Yang是美国白蛾等多种鳞翅目食叶害虫蛹期的重要寄生性天敌,具有很好的利用前景。为了人工大规模繁殖以应用于生物防治,对该小蜂的发育起点温度和有效积温进行了研究,得出白蛾黑棒啮小蜂的发育起点温度和有效积温分别为8.63℃和334.14日度,为指导室内人工大量繁殖白蛾黑棒啮小蜂打下了基础。
