Wavelet fractal character of overlapping signal

A new method based on the combining of the wavelet theory with the fractal theory and named wavelet fractal peak position method (WFPPM) is introduced to extract the number of the components and the relevant peak positions from overlapping signals in chemistry .The overlapping signal is first transformed into continuous wavelet transform value of time domain in certain dilation range via continuous wavelet transform (CWT),and then changed into capacity dimensions (Dc),The number of the components and the relevant positions of overlapping peaks can be identified easily according to the change of Dc.An investigation concerning the influence of different dilation ranges on the peak positions extracted by WFPPM is also provided .Studies show that the WFPPM is an efficient tool for extracting the peak positions and identifying the number of peaks from unresoloved signals,even when this kind of overlapping is significantly serious,Relative errors of lless than 1.0% in peak positions are found when WFPPM is used in the processing of the cadmium (Ⅱ)-indium(Ⅲ) mixture system .The analytical results demonstrate that the desired peak positions can be extracted conveniently ,accurately and rapidly from an unresoled signal via WFPPM,Tremendous developing and applications based on currently reported WFPPM in extracting overlapping signals would be expected in the near future.     

一种基于地形跟踪的航迹优化算法

以地形跟踪／地形回避为基础,提出了用轨迹的侧向仰角代替航迹的高度作为航迹规划的隐蔽性代价的概念．该方法结合航迹的航程代价和飞行器的各种机动能力约束,可以达到对已有航迹的优化作用,同时也可直接进行简单的控制点航迹规划．仿真研究结果表明,该算法满足飞行器飞行的各种条件,是一种可行方法,该方法速度快、规划出的航迹可以有效提升飞行器在飞行过程中的生存能力,可以在用于任务规划的同时,达到对航迹进行优化的目的．     

工序间在制品库存的优化研究

通过分析车间的设备状态、生产任务的工艺参数等因素对车间在制品库存在的影响，提出了确定工序间在制品库存的数学模型，该模型以满足生产的条件为前提，将车间在制品库存最小化作为目标，同时建立了在制品库存的管理调度算法，以便控制工序间在制品的库存。     

基于微机的边界扫描测试主控系统的设计

分析了边界扫描测试技术的工作机制对测试主控系统的功能需求，提出了一种基于微机PCI总线的低成本边界扫描测试主控系统的硬件设计方案，该系统以PC机为平台，以用CPLD器件实现的JTAG主控器生成满足IEEE1149．1协议的边界扫描测试信号，并用普通的SRAM实现存存器共享，仿真表明，该系统产生的测试信号完全满足IEEE1149．1协议的时序要求，可用于IC和PCB的边界扫描测试，以及改进边界扫描测试的研究和实验。     

Gated regulation of CRAC channel ion selectivity by STIM1

Two defining functional features of ion channels are ion selectivity and channel gating. Ion selectivity is generally considered an immutable property of the open channel structure, whereas gating involves transitions between open and closed channel states, typically without changes in ion selectivity. In store-operated Ca(2+) release-activated Ca(2+) (CRAC) channels, the molecular mechanism of channel gating by the CRAC channel activator, stromal interaction molecule 1 (STIM1), remains unknown. CRAC channels are distinguished by a very high Ca(2+) selectivity and are instrumental in generating sustained intracellular calcium concentration elevations that are necessary for gene expression and effector function in many eukaryotic cells. Here we probe the central features of the STIM1 gating mechanism in the human CRAC channel protein, ORAI1, and identify V102, a residue located in the extracellular region of the pore, as a candidate for the channel gate. Mutations at V102 produce constitutively active CRAC channels that are open even in the absence of STIM1. Unexpectedly, although STIM1-free V102 mutant channels are not Ca(2+)-selective, their Ca(2+) selectivity is dose-dependently boosted by interactions with STIM1. Similar enhancement of Ca(2+) selectivity is also seen in wild-type ORAI1 channels by increasing the number of STIM1 activation domains that are directly tethered to ORAI1 channels, or by increasing the relative expression of full-length STIM1. Thus, exquisite Ca(2+) selectivity is not an intrinsic property of CRAC channels but rather a tuneable feature that is bestowed on otherwise non-selective ORAI1 channels by STIM1. Our results demonstrate that STIM1-mediated gating of CRAC channels occurs through an unusual mechanism in which permeation and gating are closely coupled.     

嵌套式建模支持

阐述了人的建模思维机制。引入等价关系和划分作为问题粒度研究的基础，定义了逆商集，使之与商集一起，构成了对问题不同粒度的完整描述，并讨论了粒度的性质，借助拓扑分析，给出了问题可分解、可细化和粗化、细化等一系列定义，在问题簇和模型簇概念的基础上，提出了嵌套式建模（支持）作为面向复杂系统的建模支持方法论，具体给出了其实施步骤，这是一个人机交互的启发式过程，将嵌套式建模与传统式建模作了比较，此外还作了若干说明。     

基于超声活化的淀粉-丙烯酸高吸水树脂的制备及性能

以经超声活化的木薯淀粉、丙烯酸为原料,N,N＇-亚甲基双丙烯酰胺为交联剂,过硫酸铵一亚硫酸氢钠为氧化还原引发剂,通过水溶液聚合法制备了淀粉一丙烯酸复合高吸水树脂。分别对丙烯酸与淀粉的摩尔比、中和度、引发剂用量、交联剂用量、进行单因素实验和正交实验,并通过极差、方差分析对影响材料吸水率的影响因素进行统计分析。结果表明,最佳的反应工艺条件为：丙烯酸／淀粉摩尔比9、中和度77％、引发剂用量0．5％、交联剂用量0．085％,在此条件下所合成的淀粉一丙烯酸高吸水性树脂吸水率为1554g／g。该树脂具有较强的耐盐性能,在NaCI、MgCl2、FeCl3溶质溶液均能发生吸收,且在60rain左右均可达到饱和,饱和时吸液率分别可达到145、83、35g／g,且树脂具较强的保水性能,在25、50、75℃的恒温水浴条件下放置16h时,树脂的保水率分别为80．1％、61．2％、42．2％。     

一种基于反射镜的2×2机械式光开关

研制出一种基于反射镜的 2× 2机械式光开关 ,介绍了该器件的结构、原理及影响重复性的因素 ,该器件采用两个双光纤准直器对光路进行耦合 ,利用继电器带动反射镜工作 ,能够灵活地改变光路 .该器件主要用于光交叉连接和光路信号上下载中 ,实验和测量结果表明具有插损低、可靠性好的特点 ,应用前景极其广泛 .     

An oscillatory neural network and dynamical associative memory

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Fluid inclusions evidence for differential exhumation of ultrahigh pressure metamorphic rocks in the Sulu terrane

Since the discovery of coesite and diamond inclusions in eclogites from the Dabie-Sulu orogen, east-central China[1―3], this largest ultrahigh pressure (UHP) metamor- phic terrane in the world has attracted extensive scientific interests. A number of hydrous minerals such as zoisite, phengite, magnesite and talc have been found in the UHP rocks, showing that fluids have played an important role in this type of extreme metamorphic evolution[4―8]. Sev-eral techniques have been applied to th…