The feasibility of sewage treatment via combined chemical-biological techniques has been investigated. Two-stages pilot plant were designed for this purpose. The first stage was direct chemicalcoagulation-sedimentatio...The feasibility of sewage treatment via combined chemical-biological techniques has been investigated. Two-stages pilot plant were designed for this purpose. The first stage was direct chemicalcoagulation-sedimentation using ferric chloride in-combination with lime to reduce the organic load and to remove the colloidal and suspended solids. A comparison of two separtion techniques namely chemical coagulation conventional sedimention and chemical coagulation tube settler sedimention were investigated. The second stage was either high rate oxidation pond or biological sand-bed to oxidize ammonia to nitrate. The results obtained showed that the effluent produced from the first stage is amaenable for restricted irrigation purposes. The HIROP proved to be satisfactory second treatment method for removal of pollutant. In addition high algal biomass was obtained. However, the use of sand-bed for nitrification proved to be more efficient, complete removal of ammonia was acheived.Average residual COD and BOD values were 66 and 38 mg O2/L, respectively. Fish toxicity was completely eleminated after the nitrification processes展开更多
为提高水产动物疾病防治事件抽取的准确性,有效解决抽取过程中出现的专有名词边界模糊和事件实体过长等问题,本研究将动态权重思想引入多模型集成的事件抽取方法中。改进后的方法利用百度自然语言理解开放平台(enhanced representation ...为提高水产动物疾病防治事件抽取的准确性,有效解决抽取过程中出现的专有名词边界模糊和事件实体过长等问题,本研究将动态权重思想引入多模型集成的事件抽取方法中。改进后的方法利用百度自然语言理解开放平台(enhanced representation through knowledge integration,ERNIE)和澎湃BERT(MLM as correction BERT,MacBERT)2个预训练模型来学习文本语义信息;采用动态权重的gate模块融合特征;将学习到的语义信息传入双向长短时记忆网络(bi-directional long shortterm memory,BiLSTM)中,并通过条件随机场(conditional random field,CRF)对输出标签序列进行约束。选取ERNIE⊕MacBERT-CRF模型和ERNIE⊕MacBERT-BiLSTM-CRF模型(⊕代表简单相加求平均的融合方法)作为对照模型对提出的方法进行融合性能对比试验验证,结果显示,该方法 F1值达74.15%,比经典模型BiLSTM-CRF提高了20.02个百分点。结果表明,该方法用于水产动物疾病防治事件抽取具有更好的效果。展开更多
Water quality determines the success of inland aquaculture.The factor determining water quality is the concentration of dissolved oxygen(DO).To find effective paddlewheel aerators to enhance DO concentration,nine mode...Water quality determines the success of inland aquaculture.The factor determining water quality is the concentration of dissolved oxygen(DO).To find effective paddlewheel aerators to enhance DO concentration,nine model aerators were examined:aerator 4 blades,6 blades and 8 blades with variations of 12 holes per blade,16 holes per blade and 20 holes per blade.They were rotated at 80 RPM,100 RPM,120 RPM and 140 RPM.The results show the higher the rotation speed is,the bigger the increment of DO concentration is,but their relationship is not linier.There is a condition when increasing rotation does not affect the DO concentration meaningly.The results also indicate the greater number of blades increase more DO concentration.The results also suggest the greater number of holes per blade initially increase DO concentration increment,but after 16 holes the increment tends to reduce.It is predicted owing to that widening surface interaction due to the holes in the blade is taken over by reducing the volume of splashed water.In this research,likely the aerator with 8 blades,16 holes per blade and rotated at 120 RPM is the optimum one to increase DO concentration.However,if the energy consumption is also the concern,the aerator with 6 blades and 16 holes per blade likely is the better choice.展开更多
文摘The feasibility of sewage treatment via combined chemical-biological techniques has been investigated. Two-stages pilot plant were designed for this purpose. The first stage was direct chemicalcoagulation-sedimentation using ferric chloride in-combination with lime to reduce the organic load and to remove the colloidal and suspended solids. A comparison of two separtion techniques namely chemical coagulation conventional sedimention and chemical coagulation tube settler sedimention were investigated. The second stage was either high rate oxidation pond or biological sand-bed to oxidize ammonia to nitrate. The results obtained showed that the effluent produced from the first stage is amaenable for restricted irrigation purposes. The HIROP proved to be satisfactory second treatment method for removal of pollutant. In addition high algal biomass was obtained. However, the use of sand-bed for nitrification proved to be more efficient, complete removal of ammonia was acheived.Average residual COD and BOD values were 66 and 38 mg O2/L, respectively. Fish toxicity was completely eleminated after the nitrification processes
文摘为提高水产动物疾病防治事件抽取的准确性,有效解决抽取过程中出现的专有名词边界模糊和事件实体过长等问题,本研究将动态权重思想引入多模型集成的事件抽取方法中。改进后的方法利用百度自然语言理解开放平台(enhanced representation through knowledge integration,ERNIE)和澎湃BERT(MLM as correction BERT,MacBERT)2个预训练模型来学习文本语义信息;采用动态权重的gate模块融合特征;将学习到的语义信息传入双向长短时记忆网络(bi-directional long shortterm memory,BiLSTM)中,并通过条件随机场(conditional random field,CRF)对输出标签序列进行约束。选取ERNIE⊕MacBERT-CRF模型和ERNIE⊕MacBERT-BiLSTM-CRF模型(⊕代表简单相加求平均的融合方法)作为对照模型对提出的方法进行融合性能对比试验验证,结果显示,该方法 F1值达74.15%,比经典模型BiLSTM-CRF提高了20.02个百分点。结果表明,该方法用于水产动物疾病防治事件抽取具有更好的效果。
基金the financial support provided by the National Key Research and Development(R&D)Program of China(2018YFD0900400 to Gen He)Aoshan Talents Cultivation Program supported by Qingdao National Laboratory for Marine Science and Technology(2017ASTCP-OS12 to Gen He)+1 种基金Key R&D Program in Shandong Province(2020ZLYS03 to Kangsen Mai)China Agriculture Research System(CARS-47-G10 to Kangsen Mai).
基金the Ministry of Education and Culture,Research and Technology,Higher Education of the Republic of Indonesia(grant number 069/E5/PG.02.00.PT/2022).
文摘Water quality determines the success of inland aquaculture.The factor determining water quality is the concentration of dissolved oxygen(DO).To find effective paddlewheel aerators to enhance DO concentration,nine model aerators were examined:aerator 4 blades,6 blades and 8 blades with variations of 12 holes per blade,16 holes per blade and 20 holes per blade.They were rotated at 80 RPM,100 RPM,120 RPM and 140 RPM.The results show the higher the rotation speed is,the bigger the increment of DO concentration is,but their relationship is not linier.There is a condition when increasing rotation does not affect the DO concentration meaningly.The results also indicate the greater number of blades increase more DO concentration.The results also suggest the greater number of holes per blade initially increase DO concentration increment,but after 16 holes the increment tends to reduce.It is predicted owing to that widening surface interaction due to the holes in the blade is taken over by reducing the volume of splashed water.In this research,likely the aerator with 8 blades,16 holes per blade and rotated at 120 RPM is the optimum one to increase DO concentration.However,if the energy consumption is also the concern,the aerator with 6 blades and 16 holes per blade likely is the better choice.
