基于物联网TLINK的汽车蓄电池电量手机远程监测系统

基于汽车蓄电池电量监测提出一种TLINK物联网远程监测系统架构,该架构可通过STM32+M202+M3528模块实现对汽车蓄电池电量进行远程、在线、无线、实时监测。经过对汽车蓄电池单独测试与实车连线测试,同时针对汽车蓄电池电量手机远程监测系统进行在线调试,试验结果显示,监测仪指示灯能够正常亮起,且汽车蓄电池实测电压与TLINK物联网云监测结果一致,电流测试值与TLINK监测结果存在0.1A的误差,但该误差符合系统预设误差阈值。调试结果说明该系统监测指标符合实际值,能够充分满足蓄电池监测预警需求。

考虑需求侧电量电价弹性的电力市场交易结算机制研究

由于需求侧电量和电价具有动态相关关系,导致在电力市场运行过程中,需求侧合约电量执行的偏差率相对较高,为此,提出考虑需求侧电量电价弹性的电力市场交易结算机制研究。根据用电量变化幅度与价格变化幅度之间的关系,对电量电价弹性系数进行定义后,结合用户对电价的响应形式,在电量电价弹性系数中引入了自弹性和交叉弹性机制,实现对需求侧电量电价弹性的分析。在交易结算机制构建阶段,根据信息偏差和能量偏差,为结算机制设置了纠偏环节,并结合偏差等级,对惩罚因子进行个性化设置,以此确保结算的合理性。在测试结果中,设计结算机制下需求侧合约电量执行偏差率在6.0%以内的需求侧个数占比达到了58.49%,超出10.0%的需求侧个数占比仅为5.55%,处于较低水平。

再论中小学变压器指标调研

根据近年来中小学工程设计,对现阶段不同类型的中小学校在不同季节、不同时间段、不同类别建筑用电情况进行调查、研究、总结,绘制调研中小学的全年总用电量变化曲线图,不同季节某日变压器负载变化曲线图,教学楼、宿舍、食堂等不同类型建筑不同季节某日用电功率变化曲线图,分析其特点,总结调研学校各类别用电负荷的单位面积用电量指标、用电时段、需要系数,供设计参考。

云内大粒子对闪电活动影响的个例模拟

利用三维云起电放电模式,通过对2008年9月6日北京地区一次雷暴过程的模拟,研究了云内雨滴、冰晶、霰和雹4种粒子对云内闪电活动的直接影响。对比几种主要冰相粒子比质量浓度的分布变化与模拟闪电开始发生高度的关系,并分析几种冰相粒子所带电量变化率的时空变化特征后发现:霰和冰晶是对云内闪电发生作用最为重要的两种粒子;雹粒子对闪电发生作用有限;雨滴则对于主电荷区附近闪电发生没有直接影响。模拟结果表明:在实际观测中出现的雷达强回波达到某个高度之上可以预警闪电发生的现象,主要是由于霰粒子在一定高度之上与冰晶之间发生强烈的电荷分离,从而使云内电场迅速增强,并最终引发闪电而导致的。

跨越中等收入陷阱阶段的区域电力消费问题研究

当前,河南正处于"跨越中等收入陷阱"的关键时期,经济发展方式和电力经济关系呈现出不同于以往的新特征,亟需深入研究经济电力关系的新规律、新趋势,为能源电力科学决策提供支撑。该文对比分析了我国与典型国家在"跨越中等收入陷阱"过程中的经济电力发展特征。

不同规模抽水蓄能下风电-光电-火电联合优化运行研究

抽水蓄能电站具有优良的调峰填谷能力,能有效提高电网消纳风电、光电的能力。文章基于新疆哈密地区风电场和光伏电站实际运行数据,以哈密—郑州±800kV直流外送工程电源规模为研究对象,考虑风、光电能的间歇性和波动性,建立抽水蓄能电站和风、光、火电联合运行的优化模型,研究不同规模抽水蓄能对上述直流外送工程的电量影响,并分析成果规律,为抽水蓄能配套风、光、火电运行规模提供依据。

龙头山前置式拦污栅设计简述

文章简述了前置式拦污栅的结构布置,分析前置式拦污栅与传统拦污栅在水头损失、电量变化及工程造价等方面的差别,阐述了前置式拦污栅的优点及适用范围。

ZTE's Perspective on Applying OFDM-PON in Next Converged Optical and Wireless Networks

Driven by ZTE and other telecom vendors and operators in order to meet the ever increasing bandwidth demand from fixed optical network users and mobile backhaul/fronthaul services, the latest next generation passive optical network （NG- PON2） is being standardized by Full Service Access Network （FSAN） and International Telecommunication Union （ITU-T） which consists of two separated sub-systems, hybrid time- and wavelength-division multiplexing PON （TWDM-PON） and point-to-point wavelength- division multiplex （PtP WDM）. The TWDM-PON will be used for traditional residential, business and wireless backhaul services which are not sensitive to time delay and delay variation, whereas the PtP WDM is mainly used for emerging wireless fronthaul service which is very sensitive to the time delay and time delay variation. However, as a main international standards＇ contributor, ZTE thinks for those operators who offer multiple-level of services to both residential, business and mobile backhaul/fronthaul users, this obviously raises significant economic and power concerns by demanding to deploy two separated systems. Therefore, in this paper, for the first time, ZTE proposes a new converged optical and wireless integrated network architecture and topology by applying orthogonal frequency division multiplexing（OFDM） PON technology, which is able to simultaneously support residential, business and mobile backhaul/fronthaul services in terms of meeting the requirements of both time delay sensitive and non-sensitive services, and also address the economic and power concerns compared with conventional technologies. This architecture is further investigated and analyzed in depth on functional block, Quality-of-service （QoS）, synchronization and deployment considerations. Also ZTE reports in this paper the first 40Gbps OFDM- PON prototype in which eight wavelengths each with 5Gbps Ethernet data via 10G-PON encapsulation method （X-GEM） and 10G-PON transmission convergence （X-GTC） framing are demonstrated.

Two-Quark Condensate Changes with Quark Current Mass

Using the Schwinger Dyson equation and perturbation theory,we calculate the two-quark condensates forthe light quarks u,d,strange quark s and a heavy quark c with their current masses respectively.The results show thatthe two-quark condensate will decrease when the quark mass increases,which hints the chiral symmetry may be restoredfor the heavy quarks.

Effects of Electric and Magnetic Fields on Pure Dephasing of Exciton Qubits

In a two-dimensional quantum dot （QD） with parabolic confinement potential, we investigate pure dephasing due to deformation potential exciton-bulk longitudinal acoustic phonons （LAP） interaction for exciton qubits under the influence of external static electric and magnetic fields by adopting the full quantum-mechanical method of Kunihiro Kojima and Akihisa Tomita. The wave function is found and the dependence of the pure dephasing factor on the confinement length of the QD and time and temperature is discussed. We find the external electric and magnetic fields have important effects on pure dephasing of exciton qubits because exciton-LAP interaction increases, leading to more pure dephasing.

Contribution of Iron and Aluminum Oxides to Electrokinetic Characteristics of Variable Charge Soils in Relation to Surface Charge

The contribution of iron and aluminum oxides to electrokinetic characteristics of variable charge soils was studied through determination of electrophoretic mobilities of the red soils treated with either removal of iron oxides or coating of aluminum oxides, and of those deferrated under natural conditions. After removal of the iron oxides, zeta potentials of the latosol and the red earth decreased obviously with a shift of IEP to a lower pH, from 6.4 to 5.3 and 4.1 to 2.4 for the former and the latter, respectively, and the electrokinetic change for the latosol was greater than for the red earth. Zeta potentials of the kaolinite sample increased markedly after coated with iron oxides. The striking effect of iron oxides on electrokinetic properties of the soils was also demonstrated by the electrokinetic differences between the samples from the red and white zones of a plinthitic horizon formed naturally, and between the samples from the gley and bottom horizons of a paddy soil derived from a red earth. The coatings of aluminum oxides on the latosol and the yellow earth made their zeta potentials rise pronouncedly and their IEPs move toward higher pHs, from 6.2 to 6.8 and 4.3 to 5.3 for the former and the latter, respectively. The samples with different particle sizes also exhibited some electrokinetic variation. The experiment showed that the effects of iron and aluminum oxides were closely related to the pH and type of the soils.

Hierarchically nanostructured porous TiO_2(B) with superior photocatalytic CO_2 reduction activity

Hierarchically nanostructured, porous TiO_2(B) microspheres were synthesized by a microwave-assisted solvothermal method combined with subsequent heat treatment in air. The materials were carefully characterized by scanning and transmission electron microscopy, X-ray diffraction, CO_2 adsorption, and a range of spectroscopies, including Raman, infrared, X-ray photoelectron and UV-Vis spectroscopy. The hierarchical TiO_2(B) particles are constructed by ultrathin nanosheets and possess large specific surface area, which provided many active sites for CO_2 adsorption as well as CO_2 conversion. The TiO_2(B)nanostructures exhibited marked photocatalytic activity for CO_2 reduction to methane and methanol. Anatase TiO_2 and P25 were used as the reference photocatalysts. Transient photocurrent measurement also proved the higher photoactivity of TiO_2(B) than that of anatase TiO_2. In-situ infrared spectrum was measured to identify the intermediates and deduce the conversion process of CO_2 under illumination over TiO_2(B) photocatalyst.

Evaluation on Contribution of Steel Products to Environmental Improvement from Life Cycle Assessment Perspectives

High functionality given to steel products results in incremental environment loads at the steelmaking stage.However,at the stage of utilization,high-functional steel products prove more environment friendly than their conventional counterparts in many cases.Therefore,evaluation on contribution of steel products to environmental improvement requires an integrated approach that considers the product over its entire life cycle - life cycle assessment(LCA).This paper discusses the relationship between the improvement of steel products performance and environmental impact from the entire life cycle perspectives.The LCA method to calculate and assess contribution of high-functional steel products during the life cycle to environmental improvement is explained.Two case studies of Baoshan Iron & Steel Co.,Ltd.(Baosteel for short) are given to show that LCA is a scientific and systematic method for eco-materials evaluation or eco-design:in a power transformer,using silicon steel B30P110 to replace B30G130 can reduce carbon dioxide emissions in the region of 15.1% over the life cycle of the power transformer;tinplate steel of Baosteel for two-piece steel cans experienced six times thickness reduction from 0.280 to 0.225 mm,which results in 14.5% emission reduction over the life cycle of two-piece steel cans.It is a systematic and scientific method for evaluating on products environmental performance from life cycle perspective.