Z-curve’s encoding and decoding algorithms are primely important in many Z-curve-based applications.The bit interleaving algorithm is the current state-of-the-art algorithm for encoding and decoding Z-curve.Although ...Z-curve’s encoding and decoding algorithms are primely important in many Z-curve-based applications.The bit interleaving algorithm is the current state-of-the-art algorithm for encoding and decoding Z-curve.Although simple,its efficiency is hindered by the step-by-step coordinate shifting and bitwise operations.To tackle this problem,we first propose the efficient encoding algorithm LTFe and the corresponding decoding algorithm LTFd,which adopt two optimization methods to boost the algorithm’s efficiency:1)we design efficient lookup tables(LT)that convert encoding and decoding operations into table-lookup operations;2)we design a bit detection mechanism that skips partial order of a coordinate or a Z-value with consecutive 0s in the front,avoiding unnecessary iterative computations.We propose order-parallel and point-parallel OpenMP-based algorithms to exploit the modern multi-core hardware.Experimental results on discrete,skewed,and real datasets indicate that our point-parallel algorithms can be up to 12.6×faster than the existing algorithms.展开更多
目的研究意大利牛舌草(Anchusa italica Retz)不同极性溶剂萃取物对大鼠对缺氧/复氧心肌细胞(myocardial cells,MCs)氧化应激损伤保护作用的影响。方法模拟缺血再灌注损伤,建立体外培养心肌细胞缺氧/复氧模型,分为12组,正常对照组,缺氧...目的研究意大利牛舌草(Anchusa italica Retz)不同极性溶剂萃取物对大鼠对缺氧/复氧心肌细胞(myocardial cells,MCs)氧化应激损伤保护作用的影响。方法模拟缺血再灌注损伤,建立体外培养心肌细胞缺氧/复氧模型,分为12组,正常对照组,缺氧/复氧模型组,阳性对照组,处理组包括:高、中、低剂量乙酸乙酯萃取物+缺氧/复氧模型组;高、中、低剂量正丁醇萃取物+缺氧/复氧模型组;高、中、低剂量水萃取物+缺氧/复氧模型组。采用MTT法测定心肌细胞存活率;酶标仪检测细胞培养上清液中乳酸脱氢酶(LDH)水平及细胞内的丙二醛(MDA)含量和细胞内超氧化物歧化酶(SOD)的活力。结果与缺氧/复氧模型组比较,意大利牛舌草乙酸乙酯萃取物高剂量组、正丁醇萃取物高剂量组、水萃取物高剂量组心肌细胞存活率升高,LDH水平及MDA含量降低,SOD活力提高,差异有统计学意义(P<0.01)。结论意大利牛舌草乙酸乙酯萃取物、正丁醇萃取物、水萃取物对缺氧/复氧心肌细胞的损伤具有保护作用,其机制可能与平衡氧化应激产物和抗氧化应激的酶系统有关。展开更多
基金funded by the Key Project of the Open Fund for Computer Technology Applications in Yunnan under Grant no.CB23031D025A.
文摘Z-curve’s encoding and decoding algorithms are primely important in many Z-curve-based applications.The bit interleaving algorithm is the current state-of-the-art algorithm for encoding and decoding Z-curve.Although simple,its efficiency is hindered by the step-by-step coordinate shifting and bitwise operations.To tackle this problem,we first propose the efficient encoding algorithm LTFe and the corresponding decoding algorithm LTFd,which adopt two optimization methods to boost the algorithm’s efficiency:1)we design efficient lookup tables(LT)that convert encoding and decoding operations into table-lookup operations;2)we design a bit detection mechanism that skips partial order of a coordinate or a Z-value with consecutive 0s in the front,avoiding unnecessary iterative computations.We propose order-parallel and point-parallel OpenMP-based algorithms to exploit the modern multi-core hardware.Experimental results on discrete,skewed,and real datasets indicate that our point-parallel algorithms can be up to 12.6×faster than the existing algorithms.
文摘目的研究意大利牛舌草(Anchusa italica Retz)不同极性溶剂萃取物对大鼠对缺氧/复氧心肌细胞(myocardial cells,MCs)氧化应激损伤保护作用的影响。方法模拟缺血再灌注损伤,建立体外培养心肌细胞缺氧/复氧模型,分为12组,正常对照组,缺氧/复氧模型组,阳性对照组,处理组包括:高、中、低剂量乙酸乙酯萃取物+缺氧/复氧模型组;高、中、低剂量正丁醇萃取物+缺氧/复氧模型组;高、中、低剂量水萃取物+缺氧/复氧模型组。采用MTT法测定心肌细胞存活率;酶标仪检测细胞培养上清液中乳酸脱氢酶(LDH)水平及细胞内的丙二醛(MDA)含量和细胞内超氧化物歧化酶(SOD)的活力。结果与缺氧/复氧模型组比较,意大利牛舌草乙酸乙酯萃取物高剂量组、正丁醇萃取物高剂量组、水萃取物高剂量组心肌细胞存活率升高,LDH水平及MDA含量降低,SOD活力提高,差异有统计学意义(P<0.01)。结论意大利牛舌草乙酸乙酯萃取物、正丁醇萃取物、水萃取物对缺氧/复氧心肌细胞的损伤具有保护作用,其机制可能与平衡氧化应激产物和抗氧化应激的酶系统有关。
