一种基于并联机构的航天器姿态模拟装置的设计开发

航天器发射升空前进行地面测试和试验是航天器研制过程中的重要环节。文中针对一种基于并联机构的姿态模拟装置的设计开发,从位置分析、速度分析和虚拟样机的建造和仿真分析等方面对3UPS-PU并联机构进行研究,完成姿态模拟装置的设计,为航天器装配、试验和测试设备的设计提供一种新的思路。     

基于虚拟实训基地（车间）的工学结合人才培养模式研究

为了寻求适合自身的人才培养模式,分析了当前国内高等职业教育人才培养模式的现状,提出了基于虚拟实训基地（车间）的工学结合人才培养模式;从校内实训基地建设、课程体系与学习领域开发、教学模式和＂双师型＂教师培养等四个方面阐述了该人才培养模式的具体内容和切实可行性。     

A NEW BATO COMPLEX^99mTcCl（4—MCDO）3MeB FOR MYOCARDIAL IMAGING

A new nertral complex,^99mTcCl(4-MCDO)3MEB,((Bis[4-methyl-1,2-cyclohex-anedionedioximato(1-)-O]-[4-methyl-1,2-cyclohexanedione-dioximato(2-)-O] methyl-borato(2-)-N,N‘,N″,N‘‘‘,N‘‘‘‘0-chlorotechnetium,generally called BATO(Boronic acid adducts of technitium dioximes),has been synthesized and evaluated for potential use in myocardial perfusion imaging,It has intrinsic affinity for the blood clearance.The uptake of heart.lung and blood in mice at 2min separately are 1.12,2.48 and 6.66%ID.The complex formation is rapid,simple and highly yielded(≥93%).This process is easy to kit formation.     

复杂系统平均寿命的估计和性质

根据已知的基于最小路径或最小割集复杂系统可靠度函数的解析表达式,给出当子系统寿命分布服从指数分布时,系统平均寿命的表达式.利用这一表达形式,在子系统寿命变量服从指数分布条件下,分别就完全数据和截尾数据两种情况,给出了系统平均寿命的估计,并对估计性质进行了研究.并在完全数据下,给出了估计的渐近分布.     

Mobile Multimodality: A Theoretical Approach to Facilitate Virtual Device Environments

The classical strategy of multimodal interactions is to simultaneously utilise several modalities offered on a ‘single’ device. However, practical restrictions appear, especially in mobile communications, due to the limitations of device’s interfaces and the continuously changing communication conditions. Taking multimodality out of this single-device scenario, this paper introduces a theoretical framework for dynamic Multi User Interfaces-Device Binding (MID-B). MID-B facilitates dynamic adaptation and customisation of physically distributed devices (and their user interfaces) into one ‘virtual’ multimodal environment, thus introducing ambient awareness into user interfaces. In MID-B, one device assumes the role of a “controller” which detects and binds the interfaces and modalities available on devices in the vicinity. After discovery, it binds these modalities to deliver the actual mobile service.

大型复杂技术项目的系统观点与系统工程方法

大型复杂技术项目的管理者面对着两个重要的系统,即被研制的工程系统和项目所处的组织机构系统（包括项目团队）。系统工程是成功实现工程系统的方法和技术,它综合多种专业技术,通过分析、综合、试验和评价的反复迭代过程,开发出一个整体性能优化的系统。社会组织系统是开放的复杂巨系统。组织机构的整体能力对大型复杂技术项目管理和系统工程方法的效能具有决定性的影响。必须在组织机构管理中强调系统的观点和方法,核心问题是如何发挥人的积极性、形成强大的群体创造力。这正是系统复杂性研究中揭示系统微观因素对宏观规律的影响机制问题。     

Synchronization of the fungal and the plant circadian clock by light

Circadian clocks are endogenous time keeping devices that provide temporal control of physiology in accordance with predicted daily changes in the environment. Photoentrainment is the process that synchronizes circadian clocks-and thereby clock-controlled gene expression and physiology-to the environmental day/night cycles. Light is primarily detected by specialized photoreceptors that are coupled--directly or through other signaling components--to the rhythm-generating oscillator. As a consequence, the expression, the activity or the stability of oscillator components are altered, resulting in a change of phase and/or pace of the oscillator. In this review our present knowledge about light absorption/transduction and light-induced modifications of oscillator components in Neurospora crassa and Arabidopsis thaliana is summarized. These systems provide a basis for understanding the molecular mechanisms of entrainment in the fungal and plant circadian systems.     

Generalized system function analysis of resonant behavior of electromagnetic open systems

1 Introduction A severe challenge for the electromagnetic compatibility (EMC) of a complex elec-tromagnetic system has been given with the increasingly complicated electromagnetic environment and dense electric devices. In particular, there are a lot of various antennas and scattering bodies on the large electromagnetic objects, such as airplane, ship, car, etc., and the interaction and mutual coupling between antennas and scatterers become more and more severe, which sometimes gives rise to …     

Intelligent virtual agents keeping watch in the battlefield

One of the first areas where virtual reality found a practical application was military training. Two fairly obvious reasons have driven the military to explore and employ this kind of technique in their training; to reduce exposure to hazards and to increase stealth. Many aspects of combat operations are very hazardous, and they become even more dangerous if the combatant seeks to improve his performance. Some smart weapons are autonomous, while others are remotely controlled after they are launched. This allows the shooter and weapon controller to launch the weapon and immediately seek cover, thus decreasing his exposure to return fire. Before launching a weapon, the person who controls that weapon must acquire/perceive as much information as he can, not only from its environment, but also from the people who inhabits that environment. Intelligent virtual agents (IVAs) are used in a wide variety of simulation environments, especially in order to simulate realistic situations as, for example, high fidelity virtual environment (VE) for military training that allows thousands of agents to interact in battlefield scenarios. In this paper, we propose a perceptual model, which seeks to introduce more coherence between IVA perception and human being perception, increasing the psychological coherence between the real life and the VE experience. Agents lacking this perceptual model could react in a non-realistic way, hearing or seeing things that are too far away or hidden behind other objects. The perceptual model, we propose in this paper introduces human limitations inside the agents perceptual model with the aim of reflecting human perception.