Periodic orbits: a new language for neuronal dynamics

A new nonlinear dynamical analysis is applied to complex behavior from neuronal systems. The conceptual foundation of this analysis is the abstraction of observed neuronal activities into a dynamical landscape characterized by a hierarchy of "unstable periodic orbits" (UPOs). UPOs are rigorously identified in data sets representative of three different levels of organization in mammalian brain. An analysis based on UPOs affords a novel alternative method of decoding, predicting, and controlling these neuronal systems.     

基于指数神经元的模型感知器的设计

基于神经元感知器结构并采用最速下降自适应算法，针对电导，温度，湿度，水分，浓度，油粘度等测量问题设计一种基于指数神经元的自适应模型感知器，同时在一定意义上实现了信息融合。分析讨论了学习参数对感知器建模工作性能的影响，给出了电导，温度，水分应用实例的仿真曲线。结果表明，所设计的自适应模型感知器应用于传感器及测量系统的自动建模是有效的。该种建模方法和机制也可作为智能单元（硬件或软件）灵活地应用于实际测量或控制系统，从而取代传统的人工曲线拟和方法。     

锆合金的碘致应力腐蚀开裂研究(英文)

研究了不同热处理状态的Zr-2和Zr-4合金在不同浓度的碘介质及实验温度下的应力腐蚀开裂(SCC)行为。并对不同织构取向的试样在350℃下进行了蠕变实验,蠕变实验的载荷值选择与SCC实验相对应的一系列典型载荷。用扫描电子显微镜观察了断口特征,用透射电子显微镜和光学显微镜检查了材料的显微组织,用X-光衍射仪测定了锆合金的织构,分析讨论了材料状态、实验温度、碘浓度以及蠕变对锆合金碘致应力腐蚀行为的影响。     

统一电能质量控制器的一种新型保护方法

提出并分析了统一电能质量控制器UPQC(Unified Power Quality Controller)的一种新型保护方法。配电系统中发生短路故障时，该方法可以很有效地保护统一电能质量控制器串联部分中的辽变电路。保护的核心元件是与电流互感器二次侧并联的压敏电阻器及反并联晶闸管支路，通过对晶闸管门板信号的控制使电流互感器二次侧的电压箝位在逆变电路所允许的范围内，从而实现对UPQC的有效保护。该方法通过Matlab对380V配电线路进行了数字仿真，证明了其有效性。     

Synthesis and optical properties of glass with cadmium sulfide nanoparticles

A new approach to the synthesis of silicate glass with cadmium sulfide (CdS) nanoparticles has been developed. It has been demonstrated that replacement of cadmium sulfide with cadmium oxide and zinc sulfide used as sources of cadmium and sulfur allows a substantial reduction of sulfur volatilization during the melting. The produced samples have been investigated by the methods of spectrophotometry in the ultraviolet and visible ranges of the optical range. Thermal treatment of the samples at temperatures exceeding the glass formation point initiates the growth of CdS nanoparticles, which results in the increase of their average size from 3 to 5.2 nm and a significant shift of the fundamental absorption edge to the longer wavelength range from 380 to 480 nm.     

Carbide and titanium carbonitrides preparation from intermetal alloy scrap

The possibility to prepare metal ceramics based on carbides and titanium carbonitrides from intermetal alloy scrap has been studied. The influence of sintering conditions on phase and structure formation processes in a metal ceramics material and on the composition and properties of the prepared material has been analyzed.     

Optical Design of a Holographic Unit Based on a Two-Lens Common-Path Interferometer

Journal of Communications Technology and Electronics - The problem of fabrication of compact units for digital holography that are compatible with optical microscopes and the features and...     

New Sorption Materials Based on Organosilicon Derivatives of Thiosemicarbazides

The synthesis of organosilicon derivative monomers and polymers characterized with sorption properties has been performed. The synthesized organosilicon polymers have been investigated as sorbents for heavy (Hg(II)) and noble (Ag(I), Au(III), Rh(II), Pd(II), and Pt(IV)) metals. The coefficients of the interphase metal distribution have been estimated.