以人为中心的机器人系统的人机交互技术

以人为中心的机器人系统(HCR)强调以人为本、人机合作的思想，主要用于动态、非结构化的环境和必需有人机共同完成的任务。笔者提出了基于穿戴计算的人机接口，使HCR的人机交互不受时间、空间的限制。通过增强现实，机器人的状态、报警等重要信息成为输出通道传输的重点，有效地减少了对信息传输带宽和再现信息的资源占用，减轻操作者的负担，进而提高HCR操作者对本地状态的意识和对远程环境的感知。通过并行、互补的多通道及整合、融合多个输入信息的方法，消除信息的多又性和噪声，从根本上克服当前人机交互的输入瓶颈，实现更加高效、人性化的HCR人机交互。     

生物多样性与生态系统功能:内涵与外延

从不同层次探讨了生物多样性和生态系统功能的内涵与外延，在此基础上提出了进行生物多样性和生态系统功能研究的启示．     

重庆市社区体育网络化管理模式研究

重庆市社区体育网络化管理模式研究@胡健$重庆师范学院体育系!重庆400047 @徐钢$重庆市发展计划委员会!重庆400015 @罗韵$重庆市体育局!重庆400015~~~~     

A complete sequence and comparative analysis of a SARS-associated virus(Isolate BJ01)

Severe Acute Respiratory Syndrome (SARS) is a newly identified infectious disease[1—5]. The global outbreak of SARS has been threatening the health of people worldwide and has killed 353 people and infected more than 5462 in 27 countries, as reported by WHO on April 29, 2003 (http://www.who.int/csr/sarscountry/en). Although it has been recognized that a variant of virus from the family of coronavirus might be the candidate pathogen of SARS[1—5], its identity as the unique pathogen sti…     

松辽盆地南部海坨子地区油气成藏研究

松辽盆地南部海坨子地区扶余油层与萨尔图油层中有机包裹体有较大差异。扶余油层中有机包裹体量多 ,个体大 ,早期和晚期有机包裹体发出强的黄色荧光 ;萨尔图油层有机包裹体丰度不高 ,个体都较小 ,早期和晚期有机包裹体发出弱的浅黄色荧光。这说明萨尔图油层的烃类成熟度比扶余油层的烃类成熟度高。海坨子构造主要发生过两次成藏过程 ,早期在嫩江期末 ,晚期发生在明水期末至第三纪。扶余油层和萨尔图油层的油气来源不同 ,前者油气主要来自海坨子构造青一段烃源岩 ,后者主要来自乾安凹陷青山口组烃源岩。     

会计学专业实践性教学模式的探讨

知识经济时代 ,对会计人员的素质要求越来越高。文章主要探讨如何加强会计专业实践性教学环节 ,寻求有效的实践性教学模式 ,从而培养出具有熟练会计核算能力、利用会计资料进行会计监督、参与企业经营管理预测和决策能力的会计人才     

Abnormal piezoresponse behavior of Pb（Mg1／3Nb2／3）O3-30% PbTiO3 single crystal studied by high vacuum scanning force microscopy

The piezoresponse behavior dependence of the Pb(Mg1/3Nb2/3)O3-30%PbTi03 single crystal on the vacuum degree has been investigated by scanning force microscopy in the piezoresponse mode under high vacuum. Unusual piezoresponse behavior related to the screening charges compensation mechanism is observed on the (111) crystal face. The significant piezoresponse degradation behavior with low piezoresponse signal under high vacuum is attributed to the instability of the polarization state due to the insufficient compensation of the intrinsic screening charges for the polarization charges in PMN-30%PT single crystal. In contrast, the remarkable domain contrast of the sample at ambient pressure is owing to the dominant surface screening charges deriving from surface adsorption, which plays an important role in determining the stability of the domain behavior and in achieving the optimal properties.     

Time-division phase modulated single-photon interference in a Sagnac interferometer

We introduce a stable, long-distance singlephoton Sagnac interferometer, which has a balanced configuration to efficiently compensate phase drift caused by change of the fiber-optic path. By using time-division phase modulation, single-photon interference was realized at 1550nm in a 5-km-long as well as 27-km-long Sagnac fiber loops,with a fringe visibility higher than 90% and long-term stability. The stable performance of the single-photon interference indicated that the time-division phase-modulated Sagnac interferometer might readily lead to practical applications in single-photon routing and quantum cryptography.     

李群G在流形M上左作用的相关性质

本通过李群G在流形M上左作用，构造了M上单参数可微变换群，证明了其诱导向量场与李代数g之间存在同态映射，且诱导向量场是—李代数。     

参数不确定广义系统的鲁棒H∞控制

研究了一类具参数不确定性广义系统的鲁棒H∞ 控制问题 .基于线性矩阵不等式 (LMI)方法 ,给出了控制输入为零时不确定广义系统具H∞ 范数界的稳定性分析 ;在此基础上 ,建立了鲁棒H∞ 状态反馈控制律的设计方法 .在一定条件下 ,该方法使不确定广义系统对所有容许的不确定参数 ,相应的闭环系统是正则、无脉冲且稳定的 ,并具H∞ 范数界 .数值例子验证了该设计方法的有效性