井下电功率与电度量检测及处理方法的研究

根据煤矿井下电气设备运行状况监测的需要，提出了一种运用霍尔原理对井下电功率和电度量进行检测和处理的新方法，论述了这种检测的基本原理和对被检测信号处理的方法。

几种电度量采集方式的探讨

几种电度量采集方式的探讨安徽淮北发电厂电气运动机房王新华随着现代科学技术的发展和计算机的普及推广，调度自动化系统目前已实现的电网运行数据、信息实时采集处理的功能，在保障电网安全、优质、经济运行中已发挥出举足轻重的作用。伴随着经济的迅猛发展和市场经济的...

具有失电记忆功能的电子式电度量变送仪

文中介绍了一种失电存贮来电恢复原显示数据的电度量变送仪,并给出了原理图。

工厂内分散电度量集中上传的方案与实现

大型工业企业内往往存在大量生产负荷,为了优化生产,集中排产,需要将各负荷配线的电度量上传至调度中心,集中进行电量计算。本文以某大型国有钢铁企业为例,对电量的采集上传进行集中分析,作出具体方案。在原设备的基础上将电度量计量系统嵌入现有的SCADA操作后台中,同时将数据远传至调度中心。结合现有设备,按照电度量计量系统设计理念选择电度表采集器并选择合理的传输通信方式,以每个变电站为单位,将站内每条负荷配线的电能消耗通过电度表上传至电度表采集器,然后再由采集器将电度量分别传送至调度中心和本地监控后台。

电度量采集处理系统

论述了在原有能量管理系统（ＥＭＳ）中开发电度量采集处理子系统。介绍该系统的总体结构、硬软件功能实现，并对其存在的一些问题进行了分析和阐述。

一种电度量记忆装置

随着电网的发展,安徽电网调度自动化工作上了一个新台阶,全省各厂、站、局均配备了微机电网调度自动化设备并已投入正常运行,为电网安全调度及用经济手段管理电网起了积极的作用。但该套系统对电量的远传方面尚存在着不够理想之外电量记忆装置正是为了解决这一点对目前(?)设备进行技术改造——实现设备的完善化而研制的。

智能化电度采集板的设计及与微机远动分站的通讯

设计了一种用于电力变电站的智能抄表装置 .该装置对变电站内所有电度表的输出脉冲进行计数 ,然后通过RS2 32接口传送给站内远动分站 ,并由远动分站上传主站 .该装置采集得到的电度数据准确。

CAN总线在电力远程抄表系统中的应用

设计了一种用于电力系统的远程抄表装置，该装置以CAN作为现场总线，将现场的实时电度量通过CAN总线及RS232／CAN总线转换器实现远程传送。

电表准确性的简易判断

一只电度表,如果疑虑其走不准,可用下面叙述的方法进行判别。 电表上都标明每用1度电圆盘所转动的圈数。如标着2400r/kwh,则表示每消耗1度电,圆盘转2400圈。1度电表示1千瓦小时。

三元正极材料清洗废水资源化回收零排放处理工艺

锂电三元正极材料在清洗过程中产生含有Li^(+)、Al^(3+)、SO_(4)^(2-)、镍钴锰氧化物及少量其他离子的废水,对该三元正极材料清洗废水的资源化回收零排放处理工艺进行了阐述。该废水处理系统涉及的成套工艺包括预处理单元、废水减量化单元、沉锂单元和制纯水单元。重点对Al^(3+)的去除、膜浓缩、沉锂等关键工艺进行了重点描述,最后通过实际与理论对比分析,达到了预期的设计目标——锂资源得到有效回收、废水实现全部回用。通过对实际案例的相关数据的例举和分析,证明了本套废水处理工艺的可行性和可靠性,为锂电三元正极材料清洗废水的治理提供了典型的参考工艺路线。

An Analytical Model of Drain Current for Ultra-Thin Body and Double-Gate Schottky Source/Drain MOSFETs Accounting for Quantum Effects

A compact drain current including the variation of barrier heights and carrier quantization in ultrathin-body and double-gate Schottky barrier MOSFETs （UTBDG SBFETs） is developed. In this model, Schrodinger＇s equation is solved using the triangular potential well approximation. The carrier density thus obtained is included in the space charge density to obtain quantum carrier confinement effects in the modeling of thin-body devices. Due to the quantum effects, the first subband is higher than the conduction band edge, which is equivalent to the band gap widening. Thus, the barrier heights at the source and drain increase and the carrier concentration decreases as the drain current decreases. The drawback of the existing models,which cannot present an accurate prediction of the drain current because they mainly consider the effects of Schottky barrier lowering （SBL） due to image forces,is eliminated. Our research results suggest that for small nonnegative Schottky barrier （SB） heights,even for zero barrier height, the tunneling current also plays a role in the total on-state currents. Verification of the present model was carried out by the device numerical simulator-Silvaco and showed good agreement.

Numerical Study of Optimization of Layer Thickness in Bilayer Organic Light-Emitting Diodes

A numerical model for bilayer organic light-emitting diodes (OLEDs) is developed under the basis of trapped charge limited conduction.The dependences of the current density on the layer thickness,trap properties and carrier mobility of the hole transport layer (HTL) and emission layer (EML) in bilayer OLEDs of the structure anode/HTL/EML/cathode are numerically investigated.It is found that,for given values of the total thickness of organic layers,reduced depth of trap,total density of trap,and carrier mobility of HTL as well as EML,there exists an optimal thickness ratio of HTL to EML,by which a maximal quantum efficiency can be achieved.Through optimization of the thickness ratio,an enhancement of current density and quantum efficiency of as much as two orders of magnitude can be obtained.The dependences of the optimal thickness ratio to the characteristic trap energy,total density of trap and carrier mobility are numerically analyzed.

Skin temperature measurement method

To improve the accuracy of skin temperature measurements in thermal comfort research,a new measurement method based on a new thermometer is proposed.A platinum film resistance（Pt1000）sensor of the thermometer is welded on a printed circuit board to eliminate the heat loss from the leads and avoid the influence of the surrounding thermal environment.In order to determine the suitable thickness of the board,a steady heat conduction model is established.The simulation results reveal that when the thickness of the board is 0.2 mm,the influence of the surrounding air can be effectively prevented and the skin temperature does not obviously increase.The experimental results of verification show that the maximum measurement error of the skin temperature measured by the thermometer is 0.24 ℃,and the average measurement error of the skin temperature is 0.04 ℃.The proposed method provides an effective and reliable option for the skin temperature measurement in thermal comfort research.

Throughput scheduling in cognitive radio networks based on immune optimization

To study the throughput scheduling problem under interference temperature in cognitive radio networks, an immune algorithm-based suboptimal method was proposed based on its NP-hard feature. The problem is modeled as a constrained optimization problem to maximize the total throughput of the secondary users（ SUs）. The mapping between the throughput scheduling problems and the immune algorithm is given. Suitable immune operators are designed such as binary antibody encoding, antibody initialization based on pre-knowledge, a proportional clone to its affinity and an adaptive mutation operator associated with the evolutionary generation. The simulation results showthat the proposed algorithm can obtain about 95% of the optimal throughput and operate with much lower liner computational complexity.

1996年负荷实测和线损理论计算分析

通过每年的负荷实测计算和分析,对大用户及变电站的负荷、电压、无功配置、各类设备的损耗做了进一步的分析。1996年实测时的负荷虽未测到最高点,但理论计算的结果仍具有重要参考价值,变电站和用户的无功管理还需加强,许多变电站2台主变负荷不平衡,远郊长距离、小截面线路损耗大,需加大力度改造,加快调度自动化中电度量的开发工作,此分析作为1997年的降损工作参考。

Fabricating a Micro Electromagnetic Actuator with High Energy Density

This paper introduces a new technology to fabricate a micro electromagnetic actuator with high energy density without an enclosed magnetic circuit. This technology includes fabricating multi-turns planar micro coils and fabricating the thick magnetic （NiFe） core on the silicon wafer. The multi-turns planar micro coils are fabricated by the electroplating method from the surface along the line and by dynamically controlling the current density of the copper electrolytes. In order to fabricate thick NiFe plating,the adhesion properties between the NiFe plating and the silicon substrates are improved by changing the surface roughness of the silicon substrates and increasing the thickness of the seed layer. Furthermore,the micro electromagnetic actuator is tested and the energy density of the actuator is evaluated by force testing. The experiments show that the microactuator is efficient in producing high magnetic energy density and high magnetic force.

基于谱质心迁移的线损优化分摊方法研究

线损优化与分摊是我国电力市场改革中亟待解决的技术问题。提出一种基于谱质心迁移的线损优化分摊方法,以应对工业环境与模拟环境下线损优化分摊模型的领域适应性问题。首先计算各源领域与目标领域之间的电频谱相似度量(PFSSM),并据此将与目标领域最接近的源领域选为初始训练集,其次采用谱质心迁移模型剔除距离训练集谱质心均值较远的样本,并加入同数量的目标领域无标签样本,直至训练集谱质心均值与目标领域一致。最后基于我国某地区电力市场实际数据构造算例,试验结果表明通过计算源领域与目标领域之间的电频谱相似度量值,负载控制对线损优化分摊的影响小于线损分摊计算法则和母线运行方式。