Impact of sedimentation on groundwater recharge at Sahalanowt Dam,Salalah, Oman

Recharge dams in Oman detain floods to recharge groundwater. The impact of sedimentation on recharge at Wadi Sahalanowt Recharge Dam, in Salalah, Oman, was evaluated using field data and numerical modelling. Analysis of the thickness of sediments after flood events shows that maximum depositions were at the same locations after each event, coinciding with the lowest positions in the wadi. Numerical modelling suggests that the current practice of periodic removal of sediments will restore the storage capacity of the reservoir, but that ploughing or raking of the underlying native sedimentary rocks could be required to significantly improve infiltration rates.     

特高压通道降压运行时安徽500kV西通道建设必要性分析

根据华东1000kV特高压输电通道初期降压运行的统筹安排，结合淮南煤电基地电源、平圩电厂二期及蚌埠电厂等电源的装机进度，通过对各电源接入系统方案的计算分析，最后得出结论：为保证江北地区电力送出，安徽500kV西路过江通道在“十一五”期间建成是有必要的。     

配电网中性点电阻接地方式标准的研究

研究了低阻与高阻接地方式的阻值确定标准。对以电缆为主的城市电网宜采用低阻接地方式，取值标准为10～20n；而高阻接地方式仅适用于电网电容电流在10A以下，以架空线为主的电网，取值标准为。对供电可靠性要求较高的重要用户采用消弧线圈串电阻接地方式是发展的必然趋势。     

用ANN决定电力系统的切负荷控制

将神经网络用于电力系统切负荷实时稳定控制，分析了神经网络输入量的选取问题，并给出了陕西关中电网切负荷稳定控制的算例。     

Computer Solutions in Choosing Automatic Process Regulators

The paper discusses the use of the URA software for choosing automatic regulators and calculating their setting parameters, as it is intended for simulating transient response by computer.     

长三角地区多直流馈入及交直流相互作用特性述评

随着长三角地区电力负荷的增长以及西部水电资源的大力开发,我国中路远距离"西电东送"规模迅速扩大,大容量电力由高压直流输电(HVDC)输送.长三角地区即将成为一个具有多馈入直流系统的负荷中心,直流系统输送容量之大、落点之密集在国际上不多见.对长三角多馈入直流输电系统的概况及其特点进行了介绍.描述了多馈入直流输电系统各种相互作用特性,并对研究不同相互作用的研究方法、分析工具和评估指标进行了评述.在此基础上,针对长三角多馈入直流输电系统的特点,对其交直流系统间相互作用的特性及其研究方法给出了一些思路.     

大型水轮发电机阻尼条数对电磁参数和附加损耗的影响

针对大型水轮发电机稳态运行时阻尼条根数的变化对附加损耗的影响,以五强溪电站水轮发电机为例,结合发电机结构的对称性,给出相应的求解域和数学模型,利用有限元方法,计算水轮发电机在稳态运行时,极靴表面阻尼条分别为6根和8根2种结构下的电磁场.在此基础上,计算稳态运行时极靴表面2种结构的直、交轴同步电抗和直轴瞬态电抗,稳态运行...     

两相混合式换热器瞬态工况热力学模型及应用

换热器是能量系统的重要设备,两相混合式混热器作为换热器内部能量交换比较复杂的设备,研究其能量分布具有重要意义。通过对混合式换热器进行了研究,建立了两相混合式换热器的热力学模型,相对以往的稳态研究加入了瞬态项的影响。运用所建模型,对某除氧器进行模拟,得到了其瞬态工况的能量分布,为了验证瞬态模型的计算结果,采用稳态模型进行了计算,并与瞬态结果进行了对比,差别主要在工质蓄热火用上,并给出了影响蓄热火用的主要因素。     

Venom Peptide Toxins Targeting the Outer Pore Region of Transient Receptor Potential Vanilloid 1 in Pain: Implications for Analgesic Drug Development

The transient receptor potential vanilloid 1 (TRPV1) ion channel plays an important role in the peripheral nociceptive pathway. TRPV1 is a polymodal receptor that can be activated by multiple types of ligands and painful stimuli, such as noxious heat and protons, and contributes to various acute and chronic pain conditions. Therefore, TRPV1 is emerging as a novel therapeutic target for the treatment of various pain conditions. Notably, various peptides isolated from venomous animals potently and selectively control the activation and inhibition of TRPV1 by binding to its outer pore region. This review will focus on the mechanisms by which venom-derived peptides interact with this portion of TRPV1 to control receptor functions and how these mechanisms can drive the development of new types of analgesics.     

压电引信传感器设计技术

本文通过对武器系统使用条件和触发引信技术要求的分析,提出了压电引信方案,并系统地介绍了该引信传感器的工作原理、结构设计及调试方法。通过性能实验,证明这种压电引信传感器瞬发度高,万向性好,满足了技术要求,是种较好的快速响应万向性引信用传感器。该传感器也可用于各种三维冲击,振动测量中。