基于混沌理论的电力系统谐波检测

在分析了间歇混沌模型-Duffing振子的混沌特性基础上,研究了电力系统谐波的混沌检测原理与方法,基于Matlab/Simulink软件平台,建立了仿真模型,给出了在强噪声下电力系统谐波检测的仿真结果。仿真结果表明,Duffing振子对于与参考信号频差较小的周期信号较为敏感,对频差较大的周期干扰信号具有较强的免疫力,应用于实际电力系统谐波的该振子检测精度高,抗噪性强。     

计及可靠性和经济性的中压配电线路最佳运行效率计算方法

当前中压配电线路运行效率评价过程中采用“N-1”准则难以合理度量在不同负荷结构下线路最佳负载能力,未能充分考虑在不同负荷结构下线路运行经济性的问题,针对以上问题提出了计及可靠性和经济性的中压配电线路最佳运行效率计算方法。首先,结合安全性和经济性两个方面,对中压配电线路的运行效率进行了定义并提出了其计算方法;其次,基于可靠性指标与线路负载率关系解析,提出了不同负荷结构的中压配电线路可靠性评估流程;然后,以经济性最优为目标构建了中压配电线路最佳负载能力优化模型。最后通过算例分析,验证了本文所提方法的有效性和实用性。     

胆汁淤积性肝病治疗药物的临床研究进展

胆汁淤积性肝病是指由各种原因导致胆汁形成、分泌、排泄异常,从而引起肝脏发生病变.目前,治疗胆汁淤积性肝病的药物主要为熊去氧胆酸(UDCA),但近一半的患者对UDCA应答不充分或不耐受.这部分患者仅有奥贝胆酸(OCA)可用.随着近几年胆汁淤积性肝病的发病率明显上升,急需新型有效的治疗药物.临床研究表明,FXR激动剂、PP...     

β-Cypermethrin Alleviated the Inhibitory Effect of Medium from RAW 264.7 Cells on 3T3-L1 Cell Maturation into Adipocytes

Studies have elucidated that pyrethroids induce adipogenesis. It is also known that macrophages can affect the homeostasis of adipose tissue. However, whether and how the β-cypermethrin (β-CYP)-mediated inhibition of the macrophages affects adipogenesis remain unknown. To explore the effects of β-CYP on adipogenesis through modulating the function of macrophages, 3T3-L1 cells, a preadipocyte cell line, were exposed to culture medium from either RAW 264.7 cells, a macrophage cell line (RM), or β-CYP-treated RAW 264.7 cells (CRM). CRM decreased the inhibitory effects of RM treatment on cell proliferation and adipogenesis, as lipid accumulation, the CEBPA content, and Fasn and Acaca expression in 3T3-L1 cells were higher following CRM treatment than following RM treatment through the higher levels of the demethylated CEBPA promoter in 3T3-L1 cells. However, the medium from β-CYP- and N-acetyl-L-cysteine-cotreated RAW 264.7 cells (CNRM) partially restored the inhibitory effects of RAW 264.7 cells on 3T3-L1 cells that had been reduced by CRM, indicating that β-CYP might reduce the cytotoxicity and inhibitory effects of RAW 264.7 cells on the adipogenesis of 3T3-L1 cells through elevating ROS levels in RAW 264.7 cells. Moreover, exposure to β-CYP downregulated the TNF-α secretion in RAW 264.7 cells. In conclusion, these data demonstrated that β-CYP affected the function of RAW 264.7 cells, alleviating their inhibitory effects on adipogenesis and CEBPA demethylation in 3T3-L1 cells. β-CYP might achieve these effects through downregulating the secretion of TNF-α via elevating ROS levels in RAW 264.7 cells. Our experiments provide a new perspective on the obesogenic effect of pyrethroids.     

供热系统分时分区控制节能实测分析

针对特殊用途的公共建筑在无人情况下仍照常供暖而造成能源浪费的现状,采用分时分区控制系统对实例工程供热系统进行了节能改造.测试分析了改造后系统的节能量、整体节能效果、不同控制方案对住户温度的影响.结果表明,采用分时分区控制后供热系统节能率高达25.8％,锅炉房总节能8.7％,节能效果显著.     

基于DEM辅助后向投影模型的InSAR高程反演方法

利用干涉合成孔径雷达(InSAR)技术获取数字高程模型(DEM)时,在地形起伏剧烈区域,干涉条纹十分密集,增加了相位解缠的难度,影响相位展开和高程反演的精度.为了解决该问题,该文提出了一种基于DEM辅助后向投影模型的InSAR高程反演方法.该方法可以在统一的后向投影成像空间中实现成像和InSAR高程反演,并且引入外源D...     

天然气处山涧水净化技术研究

受客观条件限制，油田许多单位独立分布在远离城市地区，因此没有完备的净水处理系统．通过对江汉油田天然气处天然气净化厂冷却水净化技术的研究，提出了一套成本、适应性较强的可移动式的水处理方案，设备投入使用后，达到了设计要求，并有较好的推广前景．     

Logarithm bispectrum-based approach to radar range profile for automatic target recognition

The paper starts by the definition of logarithm bispectrum and the presentation of its properties relative to target recognition. A relationship is established between the logarithm bispectrum feature of a target and that of its high resolution range profile. As a result, the criterion for target recognition, based on the relationship, is induced, and its scheme and pseudocode for implementation are given. Simulation with some acquired outfield data is given to show that the approach is effective and advantageous in both rapid recognition and easy computation.     

MiSuRUTA热轧厂工艺设备简析

对Ｍｉｓｕｒｕｔａ热轧厂的工艺、设备状况及其特点进行了分析。