Taste perception and coding in the periphery

Recent identification of taste receptors and their downstream signaling molecules, expressed in taste receptor cells, led to the understanding of taste coding in the periphery. Ion channels appear to mediate detection of salty and sour taste. The sensations of sweet, umami and bitter taste are initiated by the interaction of sapid molecules with the G-protein-coupled receptors T1Rs and T2Rs. Mice lacking either PLCβ2 or TRPM5 diminish behavioral and nerve responses to sweet, umami and bitter taste stimuli, suggesting that both receptor families converge on a common signaling pathway in the taste receptor cells. Nevertheless, separate populations of taste cells appear to be uniquely tuned to sweet, umami and bitter taste. Since PLCβ2-deficient mice still respond to sour and salty stimuli, sour and salty taste are perceived independent of bitter, umami and sweet taste. In this review, the recent characterization of the cellular mechanisms underlying taste reception and perception, and of taste coding in the periphery will be discussed. Received 5 March 2006; received after revision 2 May 2006; accepted 10 June 2006     

基于DM642的双通道视频采集系统

对基于DM642双通道视频采集系统的组成结构、工作原理进行了分析研究,并利用GEL语言实现双通道的切换控制,最后给出该系统的实验结果.结果表明双通道实时视频采集系统中两个通道协调切换控制性能良好.     

恒模算法与子空间法相结合的分数间隔盲均衡

恒模算法和子空间法是目前广泛应用于通信信号处理中的两种盲算法。将恒模算法和子空间方法相结合，提出一种基于恒模算法与子空间分解法的分数间隔盲均衡算法，仿真结果表明，新算法的收敛特性明显优于传统的恒模算法。     

Density-functional formula for strongly correlated systems

Up to now, computation method dealing withthe many electron systems has been based on single particle approximation. That is to say, the wavefunctions of a system are composed of single particlewave functions (SPWF’s), and all the physical prop erties are determined by the SPWF’s. There havebeen two sophisticate techniques to solve the SPWF’s.One is the well known Hartree Fock self consistent e quations (HFSCE). The other is the Kohn Sham e quations of density funct…     

经络传导的孤立子模型

本文依据孤立子传播的稳定性和不弥散性,提出经络孤立子假说,认为:经络传导是孤立子的传播。其主要方式是:针刺等机械刺激使细胞间组织液内通常处于杂乱无章状态的、类似于液晶的“微小管”沿阻抗最小的方向取向和有序化。这就形成了中医学中沿一定通道传导的经络感传现象。用我们建立的这个经络传导的孤立子模型比较合理的解释了循经感传的一性、带状传导和压力阻滞等现象。     

碱金属掺杂C60超导体的结构与物性

1991年刚发现的碱金属掺杂C_((?)0)超导材料对于理论上研究新的超导机制与进一步开发更高转变温度的超导有机材料都有着重要的意义。本文介绍并讨论了这一材料的结构与电子性质。     

经络概念的文化发生学研究

本文拟开阔视野,超脱“科学主义”的思想藩篱,从文化发生学的角度,对经络进行考察。     

OpenGL与Creator/Vega结合的渠系仿真优化设计

在原宝鸡峡渠系仿真系统的基础上，采用MultiGen Creator建模优化了模型的层次结构，解决了复杂模型的构建与控制问题，采用OpenGL与Vega相结合的视景驱动方法，实现了二维导航图到三维场景的交互控制及镜头光晕、动态水波、跌水效果的模拟，并利用Vega类和数据库技术实现了实时捕捉、三维查询、碰撞检测功能。结果表明，OpenGL与Creator／Vega结合的方法缩短了系统开发周期，优化了模型和驱动模块，真实再现了宝鸡峡渠的景观。     

基于ZMNL经验迭代法的相关非高斯雷达杂波仿真

针对基于零记忆非线性变换(zero memory nonlinearity,ZMNL)的相关非高斯雷达杂波仿真,提出了一种类似神经网络形式的经验迭代法。该方法在对输出频谱估计的基础上,反复修正输入频谱,经过多次迭代运算来确定非线性变换前后相关系数之间的关系。给出了应用该方法进行杂波仿真的具体步骤,仿真结果证明了该方法的有效性。     

The Research on Financing Channels Innovation in Chinese Real Estate Industry

This paper is aimed at designing financing channels in Chinese real estate market. According to the information we grasped, this paper discusses the current and prospective real estate development. Meanwhile, the analysis of the financial channels in this industry and existing problems are made. Finally, this paper referred the successful experiences of some developed countries to conclude that China should cultivate advanced financial market providing as many instruments as possible to disperse current risks in real estate market.