基于深度神经网络-近似线性网络混合模型的电力系统状态估计方法

为提高电力系统实时状态估计的精度和计算效率,解决电网电压波动频发、潮流分布的不确定性剧增等问题,通过提出一种基于深度神经网络和近似线性网络模型的电力系统状态估计方法,研究了其在电网的应用。该方法将混合系统量测数据通过粒子滤波算法得到样本集,利用训练样本训练所提出的混合神经网络模型,最后将测试样本输入已建立的模型中获得系统状态的估计结果。通过IEEE118节点系统进行的负载数据仿真实验表明：基于混合神经网络模型的电力系统状态估计方法不仅能快速进行海量数据训练,还能有效避免过拟合;在实时状态估计的精度和计算效率方面,相较于高斯-牛顿法均有提高。可见所提方法在电力系统实时状态估计方面具有一定的应用价值。     

用变率配点法分析矩形薄板几何非线性问题

从薄板几何非线性问题的Ｖｏｎ Ｋａｍａｎ方程出发，采用变率配点法，分析了矩 薄板在均布荷载作用下的大挠度弯曲问题，并利用连续延拓法对所得的非线性方程组进行解。计算结果表明，本文的解优于一般配点解。     

具有脉冲的时滞Logistic方程的全局吸引性

考虑具有脉冲的时滞Logistic方程其中τ＞0,r(t)∈C([t0,+∞),R+);-1＜bk≤0;且{tk}满足t0＜t1＜t2＜…＜tk＜…,limtk=+∞,给出了(*)的解是全局吸引的充分条件.     

考虑初始投资递减的住宅能源系统的经济性评价

近年来，由于具有较高的能源利用效率和较低的温室气体排放量，燃料电池在住宅中的应用在日本受到了关注．另外，太阳能电池系统也早已被导入住宅的能源利用中．然而，住宅用燃料电池和太阳能电池系统的初始投资成为这类住宅能源系统普及应用的一个主要的障碍．在人类的生产活动中，新的产品会随着技术的提高、产量的增加而降低成本，这两种系统的初始投资也必将降低、但是很少有研究涉及到考虑初始投资递减的这类系统的经济性评价．文中通过应用学习曲线的方法，预测了2005—2030年间以5年为间隔的日本住宅用燃料电池和太阳能发电的初始投资递减，并且试算了日本典型住宅的通用能源系统、燃料电池系统和太阳能电池系统的年间能源费用，由此评价了住宅用燃料电池和太阳能发电的经济性．     

DESIGN OF A SOFTWARE AGENT FOR BUSINESS GAMING SIMULATION

1. Introduction 1.1 Gaming Simulation Gaming Simulation is categorized into the following five fields: Entertainment games, Educational games, Experimental games, Research games, and Operational games (Stahl, 1983). Business game is one of the Educational games. Business game is a tool that focuses on understanding about business and the principle of management through the experience in a virtual world. Through this method the players have roles of managers or presidents of companies (Ter…     

铁电陶瓷PMN－PT在室温附近的退极化致冷效应

本文推导了有序熵变化量及温度变化量与外加电场大小、操作温度和材料居里常数之间的关系，在室温附近，对铁电陶瓷ＰＭＮ－ＰＴ的致冷效应进行了测量验证，与理论推导的结论定性吻合，在１６ｋＶ／ｃｍ电场下再退极化，可产生２Ｋ的温度变化，本文并对此效应作了初步的解释。     

纳米磁性膨润土复合材料表征及降解甲基橙研究

以纯化膨润土为原料,通过铁盐与膨润土浆液反应制备非均相纳米磁改性Fe3O4/膨润土复合材料,研究其对甲基橙的降解性能。结果表明,纳米磁性颗粒以Fe3O4附载于膨润土上形成磁性集合体,其对甲基橙废水等温吸附符合Langmuir等温吸附模型。在pH为7、温度为25℃、纳米磁性膨润土投加量为1g/L、H2O2投加量为2.5mmol/L、降解时间为120min条件下,对模拟甲基橙废水降解率达96%,CODCr去除率为94.7%,色度去除率为88.8%。     

Human ES-cell-derived cardiomyocytes electrically couple and suppress arrhythmias in injured hearts

Transplantation studies in mice and rats have shown that human embryonic-stem-cell-derived cardiomyocytes (hESC-CMs) can improve the function of infarcted hearts, but two critical issues related to their electrophysiological behaviour in vivo remain unresolved. First, the risk of arrhythmias following hESC-CM transplantation in injured hearts has not been determined. Second, the electromechanical integration of hESC-CMs in injured hearts has not been demonstrated, so it is unclear whether these cells improve contractile function directly through addition of new force-generating units. Here we use a guinea-pig model to show that hESC-CM grafts in injured hearts protect against arrhythmias and can contract synchronously with host muscle. Injured hearts with hESC-CM grafts show improved mechanical function and a significantly reduced incidence of both spontaneous and induced ventricular tachycardia. To assess the activity of hESC-CM grafts in vivo, we transplanted hESC-CMs expressing the genetically encoded calcium sensor, GCaMP3 (refs 4, 5). By correlating the GCaMP3 fluorescent signal with the host ECG, we found that grafts in uninjured hearts have consistent 1:1 host–graft coupling. Grafts in injured hearts are more heterogeneous and typically include both coupled and uncoupled regions. Thus, human myocardial grafts meet physiological criteria for true heart regeneration, providing support for the continued development of hESC-based cardiac therapies for both mechanical and electrical repair.     

Klotho converts canonical FGF receptor into a specific receptor for FGF23

FGF23 is a unique member of the fibroblast growth factor (FGF) family because it acts as a hormone that derives from bone and regulates kidney functions, whereas most other family members are thought to regulate various cell functions at a local level. The renotropic activity of circulating FGF23 indicates the possible presence of an FGF23-specific receptor in the kidney. Here we show that a previously undescribed receptor conversion by Klotho, a senescence-related molecule, generates the FGF23 receptor. Using a renal homogenate, we found that Klotho binds to FGF23. Forced expression of Klotho enabled the high-affinity binding of FGF23 to the cell surface and restored the ability of a renal cell line to respond to FGF23 treatment. Moreover, FGF23 incompetence was induced by injecting wild-type mice with an anti-Klotho monoclonal antibody. Thus, Klotho is essential for endogenous FGF23 function. Because Klotho alone seemed to be incapable of intracellular signalling, we searched for other components of the FGF23 receptor and found FGFR1(IIIc), which was directly converted by Klotho into the FGF23 receptor. Thus, the concerted action of Klotho and FGFR1(IIIc) reconstitutes the FGF23 receptor. These findings provide insights into the diversity and specificity of interactions between FGF and FGF receptors.     

Violation of a Bell-like inequality in single-neutron interferometry

Non-local correlations between spatially separated systems have been extensively discussed in the context of the Einstein, Podolsky and Rosen (EPR) paradox and Bell's inequalities. Many proposals and experiments designed to test hidden variable theories and the violation of Bell's inequalities have been reported; usually, these involve correlated photons, although recently an experiment was performed with (9)Be(+) ions. Nevertheless, it is of considerable interest to show that such correlations (arising from quantum mechanical entanglement) are not simply a peculiarity of photons. Here we measure correlations between two degrees of freedom (comprising spatial and spin components) of single neutrons; this removes the need for a source of entangled neutron pairs, which would present a considerable technical challenge. A Bell-like inequality is introduced to clarify the correlations that can arise between observables of otherwise independent degrees of freedom. We demonstrate the violation of this Bell-like inequality: our measured value is 2.051 +/- 0.019, clearly above the value of 2 predicted by classical hidden variable theories.