高压动态无功补偿装置运行试验系统的研究

为验证动态无功补偿装置的性能,本文通过分析装置工作原理,提出了一种高压动态无功补偿装置运行试验系统,采用10 kV电源经有载调压器作为试验主电源;通过多组变压器变换满足多种电压等级的高压无功补偿装置的试验需求;设计陪试无功补偿装置与被试品进行互补的工作原理,在达到对试品进行试验考核的同时降低了试验对电网的冲击及实验室进线电源的需求.通过试验验证,该试验系统具有SVC及SVG运行性能的考核能力.     

Local Epidermal Endocrine Estrogen Protects Human Melanocytes against Oxidative Stress,a Novel Insight into Vitiligo Pathology

As the outermost barrier of the body, skin is a major target of oxidative stress. In the brain, estrogen has been reported synthesized locally and protects neurons from oxidative stress. Here, we explored whether estrogen is also locally synthesized in the skin to protect from oxidative stress and whether aberrant local estrogen synthesis is involved in skin disorders. Enzymes and estrogen receptor expression in skin cells were examined first by quantitative real-time PCR and Western blot analyses. Interestingly, the estrogen synthesis enzyme was mainly localized in epidermal keratinocytes and estrogen receptors were mainly expressed in melanocytes among 13 kinds of cultured human skin cells. The most abundant estrogen synthesis enzyme expressed in the epidermis was 17β-hydroxysteroid dehydrogenase 1 (HSD17β1) localized in keratinocytes, and the most dominant estrogen receptor expressed in the epidermis was G protein-coupled estrogen receptor 1 (GPER1) in melanocytes. To investigate whether keratinocyte-derived estradiol could protect melanocytes from oxidative stress, cultured human primary epidermal melanocytes (HEMn-MPs) were treated with H₂O₂ in the presence or absence of 17β estradiol or co-cultured with HSD17β1 siRNA-transfected keratinocytes. Keratinocyte-derived estradiol exhibited protective effects against H₂O₂-induced cell death. Further, reduced expression of HSD17β1 in the epidermis of skin from vitiligo patients was observed compared to the skin from healthy donors or in the normal portions of the skin in vitiligo patients. Our results suggest a possible new target for interventions that may be used in combination with current therapies for patients with vitiligo.     

智慧能源站能效指标评估体系

为能够评价智慧能源站的能效水平,提出了适用于三站合一形式的能效评估体系.首先,分析了各个站的能耗影响因素,建立了智慧能源站指标体系,并给出了各个指标的计算方法;其次,基于提出的能效指标体系,通过主观权重法和关联度分析法的结合确定各指标权重,结合能效分值和权重对智慧能源站进行能效评估,并进行仿真,研究不同运行状态下的能效变化,给出节约能耗的具体建议.     

烷基磺酸蒽醌电解质的合成及其在液流电池中的应用

分别以1,2-二羟基蒽醌、2,6-二羟基蒽醌和1,4-二羟基蒽为原料与丙烷磺内酯反应,合成了3种烷基磺酸基蒽醌[1-羟基-2-氧丙烷磺酸基蒽醌(1,2-AQPSH2)、2,6-二氧丙烷磺酸基蒽醌(2,6-AQDPSH2)和1-羟基-2-氧丙烷磺酸基蒽醌(1,4-AQPSH2)].研究了3种烷基磺酸基蒽醌在1 mol/L NaCl水溶液中的溶解性及其在中性条件下的氧化还原性质.选取溶解性最好的烷基磺酸基蒽醌(1,4-AQPSH2)作为阳极电解质,与2,2,6,6-四甲基哌啶醇(4-OH-TEMPO)阴极电解液搭配使用,以Nafion212作为离子交换膜,组装了中性水系有机氧化还原液流电池单电池,该液流电池的开路电压约为1.0 V,在60 mA/cm2电流密度下进行循环性能测试,电池的能量密度为68％,库仑效率为97％,电压效率为69％,经过75个充放电循环测试后电池的放电容量没有明显的降低,表明1,4-AQPSH2在该体系下运行具有良好的稳定性.这些结果表明1,4-AQPSH2作为中性水系有机氧化还原液流电池阳极电解液具有很好的应用前景.     

熔融织构YBCO块样品的磁特性研究

对MTG区熔生长法,慢冷法,粉末熔融生长法这3种方法制备的熔融织构YBCO块样品进行了交流磁化率和磁阻的测量。根据实验结果计算了样品的钉扎势,并且发现3种方法制备的样品在150 mT外磁场下均显示出基本消除弱连接的特性;粉末融熔生长法所制样品中有较纯净123相和较好织构,质量最好。     

Model of intense pulsed ion beam and simulation study of energy deposited on target

Gaussian type models have been established according to the real detected voltage of magnetically insulated ion diode and intense pulsed ion beam density near the focus of the diode. The energy deposition of Al target irradiated by intense pulsed ion beam has been simulated by Monte Carlo method based on these models. The results of energy depositions of the irradiation of single energy ions and the Gaussian distribution IPIB have been obtained. Especially cases of ion beam irradiating Al target at different angles on one dimension and two dimensions are discussed. The evolution processes of the energy deposition of ions in target have been simulated during a pulse. In addition, incident angles of H⁺ ions and C⁺ ions ranging from 20 to 40° have been researched. We obtained the conclusions that C⁺ ions of the beam affect the physical properties of near surface region, but H⁺ ions affect the deeper layer. The energy of intense pulsed ion beam mainly deposits on target surface, so melting and evaporation begin both from target surface.     

中铝瓷球的应用研究

本文以长石、粘土、矾土等天然矿物原料,采用可塑法成型工艺,研究了配方与烧结温度、瓷球密度、外观颜色的关系,研制成功了成本低、密度大、外观质量较好的中铝瓷球的较佳配方,并解决了瓷球生产中的关键工艺技术问题。     

妊娠相关血浆蛋白A的分离及纯化

采用人胎盘血为原料,利用Sephadex G-200,DEAE-Sephadex A-50层析,Sepharose 4B反相免疫亲和层析技术,获得妊娠相关血浆蛋白A(PAPP-A)纯品,经8.0％聚丙烯酰胺凝胶电泳、免疫电泳、双向免疫扩散证明,所提取的PAPP-A纯品为单一成分。免疫家兔获得抗血清,其效价在1:16以上。     

氟磷灰石-氟金云母微晶玻璃的生物活性研究

通过模拟细胞外液浸泡及动物骨内种植的方法研究了氟磷灰石-氟金云母微晶玻璃的生物活性机理。借助于SEM/EDAX,薄膜XRD,IRRS及原子吸收光谱分析等技术,研究了该微晶玻璃在生理环境中表面羟墓碘灰石层的形成过程。根据微晶玻璃中主晶相种类、显微结构特点及溶液中各离子的浓度等讨沦了羟基碑灰石层的形成机理。认为微晶玻璃中残余玻璃相的Ca~(2+)溶出及溶液相对于羟基磷灰石的过饱和状态,对材料表面羟基碑灰石层的形成具有重要意义。形成的羟基磷灰石层具有较低的结晶度,它是由最初的无定形态含水富CaO,P_2O_5薄层晶化转变而成。     

基于SR-UKF的OFDM频偏迭代估计算法研究

对高速运动环境下多普勒效应引起的大载波频偏引起的载波间干扰进行数学分析,建立带频偏的非时变和时变频偏OFDM动态状态空间模型,提出了基于平方根无迹卡尔曼滤波（square-root unscented Kalman filter , SR-UKF）的频偏估计算法。将非线性状态估计思想引入OFDM频偏估计中,实现了对频偏的有效跟踪和估计。仿真结果表明,在大频偏、高阶调制下,SR-UKF频偏估计算法较自消除算法、最大似然估计算法具有更好的误码率性能;在收敛精度、稳定度和对信噪比敏感度方面,性能较扩展卡尔曼滤波算法均有所提升。