Dynamic neural network(NN)techniques are increasingly important because they facilitate deep learning techniques with more complex network architectures.However,existing studies,which predominantly optimize the static...Dynamic neural network(NN)techniques are increasingly important because they facilitate deep learning techniques with more complex network architectures.However,existing studies,which predominantly optimize the static computational graphs by static scheduling methods,usually focus on optimizing static neural networks in deep neural network(DNN)accelerators.We analyze the execution process of dynamic neural networks and observe that dynamic features introduce challenges for efficient scheduling and pipelining in existing DNN accelerators.We propose DyPipe,a holistic approach to optimizing dynamic neural network inferences in enhanced DNN accelerators.DyPipe achieves significant performance improvements for dynamic neural networks while it introduces negligible overhead for static neural networks.Our evaluation demonstrates that DyPipe achieves 1.7x speedup on dynamic neural networks and maintains more than 96%performance for static neural networks.展开更多
【目的】通过响应面法优化超声辅助纤维素酶提取扫帚菜多糖的工艺,评价多糖的抗氧化活性。【方法】在单因素试验的基础上,以多糖提取率为响应值,选择酶用量、超声温度、超声时间和液料比进行Box-Behnken试验设计,研究了各工艺条件及其...【目的】通过响应面法优化超声辅助纤维素酶提取扫帚菜多糖的工艺,评价多糖的抗氧化活性。【方法】在单因素试验的基础上,以多糖提取率为响应值,选择酶用量、超声温度、超声时间和液料比进行Box-Behnken试验设计,研究了各工艺条件及其交互作用对扫帚菜多糖提取率的影响,得到了二次多项式回归方程模型,并以猪油的抗氧化性能来评价多糖的抗氧化活性。【结果】扫帚菜多糖的最佳提取工艺条件为:酶用量2.1%、超声温度51℃、超声时间20 min、液料比25 m L/g,该条件下扫帚菜多糖的提取率为65.93 mg/g,与理论预测值的相对误差为0.21%。扫帚菜多糖对猪油有一定的抗氧化能力。【结论】利用响应面法优化超声辅助纤维素酶提取扫帚菜多糖的工艺有效、可靠,扫帚菜多糖能有效提高猪油产品的货架期。展开更多
目的探讨电刺激对大鼠坐骨神经卡压损伤后神经再生和恢复的作用。方法选用健康雄性大鼠,制备经典大鼠坐骨神经慢性卡压模型,3个月后将损伤的坐骨神经外膜切开,置入刺激电极并皮下埋入刺激器,进行电刺激治疗12周,评估电刺激治疗对大鼠坐...目的探讨电刺激对大鼠坐骨神经卡压损伤后神经再生和恢复的作用。方法选用健康雄性大鼠,制备经典大鼠坐骨神经慢性卡压模型,3个月后将损伤的坐骨神经外膜切开,置入刺激电极并皮下埋入刺激器,进行电刺激治疗12周,评估电刺激治疗对大鼠坐骨神经再生和功能恢复情况,以及患肢三头肌萎缩情况;采用神经组织染色法,用光镜和透射电镜,观察坐骨神经髓鞘的再生情况。结果周围神经慢性卡压模型建立后,大鼠坐骨神经明显受损。2组造模成功时坐骨神经功能指数(sciatic function index,SFI)指数明显降低,随电刺激治疗延长,SFI明显升高,治疗后实验组各时点SFI均高于对照组,差异有统计学意义(P<0.05)。造模成功时,2组大鼠肌肉均发生萎缩,重量明显降低;治疗后实验组各时点肌肉重量均大于对照组,差异有统计学意义(P<0.05)。随治疗时间延长,2组神经传导速度明显升高,治疗4,8,12周时实验组大鼠神经传导速度均高于对照组,差异有统计学意义(P<0.05)。治疗12周时2组髓神经纤维数量、神经纤维直径、髓鞘厚度均大于造模成功时,且实验组髓神经纤维数量、神经纤维直径、髓鞘厚度均大于对照组,差异有统计学意义(P<0.05)。结论低频电刺激治疗可促进慢性卡压损伤坐骨神经的再生和功能恢复。展开更多
基金supported by the Beijing Natural Science Foundation under Grant No.JQ18013the National Natural Science Foundation of China under Grant Nos.61925208,61732007,61732002 and 61906179+1 种基金the Strategic Priority Research Program of Chinese Academy of Sciences(CAS)under Grant No.XDB32050200the Youth Innovation Promotion Association CAS,Beijing Academy of Artificial Intelligence(BAAI)and Xplore Prize.
文摘Dynamic neural network(NN)techniques are increasingly important because they facilitate deep learning techniques with more complex network architectures.However,existing studies,which predominantly optimize the static computational graphs by static scheduling methods,usually focus on optimizing static neural networks in deep neural network(DNN)accelerators.We analyze the execution process of dynamic neural networks and observe that dynamic features introduce challenges for efficient scheduling and pipelining in existing DNN accelerators.We propose DyPipe,a holistic approach to optimizing dynamic neural network inferences in enhanced DNN accelerators.DyPipe achieves significant performance improvements for dynamic neural networks while it introduces negligible overhead for static neural networks.Our evaluation demonstrates that DyPipe achieves 1.7x speedup on dynamic neural networks and maintains more than 96%performance for static neural networks.
文摘【目的】通过响应面法优化超声辅助纤维素酶提取扫帚菜多糖的工艺,评价多糖的抗氧化活性。【方法】在单因素试验的基础上,以多糖提取率为响应值,选择酶用量、超声温度、超声时间和液料比进行Box-Behnken试验设计,研究了各工艺条件及其交互作用对扫帚菜多糖提取率的影响,得到了二次多项式回归方程模型,并以猪油的抗氧化性能来评价多糖的抗氧化活性。【结果】扫帚菜多糖的最佳提取工艺条件为:酶用量2.1%、超声温度51℃、超声时间20 min、液料比25 m L/g,该条件下扫帚菜多糖的提取率为65.93 mg/g,与理论预测值的相对误差为0.21%。扫帚菜多糖对猪油有一定的抗氧化能力。【结论】利用响应面法优化超声辅助纤维素酶提取扫帚菜多糖的工艺有效、可靠,扫帚菜多糖能有效提高猪油产品的货架期。
文摘目的探讨电刺激对大鼠坐骨神经卡压损伤后神经再生和恢复的作用。方法选用健康雄性大鼠,制备经典大鼠坐骨神经慢性卡压模型,3个月后将损伤的坐骨神经外膜切开,置入刺激电极并皮下埋入刺激器,进行电刺激治疗12周,评估电刺激治疗对大鼠坐骨神经再生和功能恢复情况,以及患肢三头肌萎缩情况;采用神经组织染色法,用光镜和透射电镜,观察坐骨神经髓鞘的再生情况。结果周围神经慢性卡压模型建立后,大鼠坐骨神经明显受损。2组造模成功时坐骨神经功能指数(sciatic function index,SFI)指数明显降低,随电刺激治疗延长,SFI明显升高,治疗后实验组各时点SFI均高于对照组,差异有统计学意义(P<0.05)。造模成功时,2组大鼠肌肉均发生萎缩,重量明显降低;治疗后实验组各时点肌肉重量均大于对照组,差异有统计学意义(P<0.05)。随治疗时间延长,2组神经传导速度明显升高,治疗4,8,12周时实验组大鼠神经传导速度均高于对照组,差异有统计学意义(P<0.05)。治疗12周时2组髓神经纤维数量、神经纤维直径、髓鞘厚度均大于造模成功时,且实验组髓神经纤维数量、神经纤维直径、髓鞘厚度均大于对照组,差异有统计学意义(P<0.05)。结论低频电刺激治疗可促进慢性卡压损伤坐骨神经的再生和功能恢复。
