随着电力体制改革的不断深入,为争夺市场份额、吸引潜在用户购电并提高自身收益,售电公司愈发重视用户的用电体验。对用户日负荷曲线的聚类分析能够有效挖掘用户的用电行为特性,进而为售电公司提供决策依据。针对FCM算法运行时间较长、...随着电力体制改革的不断深入,为争夺市场份额、吸引潜在用户购电并提高自身收益,售电公司愈发重视用户的用电体验。对用户日负荷曲线的聚类分析能够有效挖掘用户的用电行为特性,进而为售电公司提供决策依据。针对FCM算法运行时间较长、对初始数据敏感、容易陷入局部最优、需要人为给定类簇数以及聚类结果不稳定等问题,提出了一种基于奇异值分解(Singular Value Decomposition,SVD)和改进FCM的日负荷聚类方法。首先对日负荷数据进行奇异值分解降维;然后,利用KNN和DPC算法形成初始类簇中心矩阵,并在FCM算法的迭代寻优过程中通过局部密度和邻近点对隶属度进行修正;最后,以某地区工商业用户日负荷曲线进行算例分析。结果表明,与传统聚类算法相比,该方法的聚类结果更准确、更稳定,运行速度更快。展开更多
Chlortetracycline (CTC) fluorescence patterns were used to study changes in the patterns B and AR of mouse sperm after incubation with reagents that would block the UPP. They were the monoclonal antibody againstubiqui...Chlortetracycline (CTC) fluorescence patterns were used to study changes in the patterns B and AR of mouse sperm after incubation with reagents that would block the UPP. They were the monoclonal antibody againstubiquitinated proteins——UCPi; the polyclonal antibodyagainst ubiquitin-anti-Ub, and a special inhibitor againstproteasome——ALLN. Furthermore, we treated the capaci-tated sperm or the eggs with these reagents separately and tested whether the normal in vitro fertilization was blocked or not. Results illustrate that UCP1, anti-Ub, and ALLN have little effects on sperm capacitation and acrosome reaction, but they do inhibit fusion of mouse sperm with eggs, which suggests that UPP play an important role in mouse in vitro fertilization.展开更多
文摘随着电力体制改革的不断深入,为争夺市场份额、吸引潜在用户购电并提高自身收益,售电公司愈发重视用户的用电体验。对用户日负荷曲线的聚类分析能够有效挖掘用户的用电行为特性,进而为售电公司提供决策依据。针对FCM算法运行时间较长、对初始数据敏感、容易陷入局部最优、需要人为给定类簇数以及聚类结果不稳定等问题,提出了一种基于奇异值分解(Singular Value Decomposition,SVD)和改进FCM的日负荷聚类方法。首先对日负荷数据进行奇异值分解降维;然后,利用KNN和DPC算法形成初始类簇中心矩阵,并在FCM算法的迭代寻优过程中通过局部密度和邻近点对隶属度进行修正;最后,以某地区工商业用户日负荷曲线进行算例分析。结果表明,与传统聚类算法相比,该方法的聚类结果更准确、更稳定,运行速度更快。
基金This work was supported by the Special Funds for Major State Basic Research Projects (Grant No. G1999053901) the National Natural Science Foundation of China (Grant No. 39430080).
文摘Chlortetracycline (CTC) fluorescence patterns were used to study changes in the patterns B and AR of mouse sperm after incubation with reagents that would block the UPP. They were the monoclonal antibody againstubiquitinated proteins——UCPi; the polyclonal antibodyagainst ubiquitin-anti-Ub, and a special inhibitor againstproteasome——ALLN. Furthermore, we treated the capaci-tated sperm or the eggs with these reagents separately and tested whether the normal in vitro fertilization was blocked or not. Results illustrate that UCP1, anti-Ub, and ALLN have little effects on sperm capacitation and acrosome reaction, but they do inhibit fusion of mouse sperm with eggs, which suggests that UPP play an important role in mouse in vitro fertilization.
