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关键词： 态势感知   装备建设   空间   美军   太空目标   能力建设   传感器技术   太空环境  

摘要： 空间态势感知的主要任务是为太空攻防提供基础和保障,它包括探测跟踪和识别太空目标、监测太空环境、进行太空威胁告警和为太空攻击提供目标信息。为了强化太空控制能力,美国近期高度重视空间态势感知的能力建设,不但将空间态势感知提升为独立的太空任务领域,而且加快装备建设,提升指挥与控制能力,强化国际合作,多条腿走路,快速提升能力。2014年,美军多颗高轨空间态势感知卫星入轨,并继续研发立方体卫星与通用传感器技术,发展一体化指挥与控制能力,普遍加强与盟国的空间态势感知数据共享与能力共建,新型地基太空监视系统建造工作取得了实质性进展。

关键词： 传感器技术   航天装备   太空目标   态势感知   能力建设   国外   太空环境   目标信息  

摘要： 空间态势感知的主要任务是为太空攻防提供基础和保障,它包括探测跟踪和识别太空目标、监测太空环境、进行太空威胁告警和为太空攻击提供目标信息。为了强化太空控制能力,美国近期高度重视空间态势感知的能力建设,不但将空间态势感知提升为独立的太空任务领域,而且加快装备建设,提升指挥与控制能力,强化国际合作,多条腿走路,快速提升能力。2014年,美军多颗高轨空间态势感知卫星入轨,并继续研发立方体卫星与通用传感器技术,发展一体化指挥与控制能力,普遍加强与盟国的空间态势感知数据共享与能力共建,新型地基太空监视系统建造工作取得了实质性进展。

关键词： 传感器   器件   静态特性  

摘要： 传感器是一种常见的却又很重要的器件,它是感受规定的被测量的各种量并按一定规律将其转化为有用信号的器件或装置。传感器的静态特性主要指标有线性度、迟滞、重复性、灵敏度和准确度。本文将从这些方面对物理传感器、光纤传感器、仿生传感器、红外传感器、电磁传感器等传感器件进行对比浅析,让读者对常用的传感器有简单的认识。

关键词： Cognitive Processes   Technology Uses in Education   Reflection   Error Patterns   Error Correction   Manufacturing   Program Effectiveness   Evaluation   Skill Development   Psychomotor Skills   Student Improvement   Logical Thinking  

摘要： This study investigated a Ubiquitous Sensor System (USS) that we developed to assess student thought process during practical lessons on a real-time basis and to provide students with a reflective learning environment. Behavioral curves and data obtained by the USS would help students understand where they had made mistakes during practical lessons and the exact times when incorrect process parameters were observed. This research was conducted during a course on manufacturing. The results indicated that the proposed USS was effective in improving student analysis and evaluation skills in manufacturing thinking, as well as the three psychomotor skills of guided response, mechanism and complex overt response. Student psychomotor skills also gained an overall improvement. Results also showed that improvements in student thought process also helped in the learning of psychomotor skills and that the USS helped improve the clarity of student thought process during practical operations. The improved clarity of thought allowed students to understand the reasons behind their thought process for them to make the necessary logical deductions. Through repeated reflection and practice, students would then be able to create works with personal creative elements.

关键词： p53 Gene   Carbon nanotubes   Magnetic particles   DNA hybridization   Differential pulse voltammetry  

摘要： Electrochemical monitoring of DNA hybridization related to p53 gene sequence was investigated using genomagnetic assay combined with single walled carbon nanotube (SWCNT) modified pencil graphite electrodes (PGEs). The hybridization was performed either at magnetic beads (MB) surface or in solution. The enhanced guanine signal was obtained using SWCNT-PGEs compared to one obtained by unmodified PGEs. The selectivity of genomagnetic assay was tested under optimum conditions. The DLs were calculated as 0.88 mu M and 0.11 mu M for hybridization performed at MB surface and solution, respectively. This selective, practical and cost effective genomagnetic assay combined with SWCNT-PGEs is reported herein for the first time.

关键词： Redox reactions   Sensors   Liquids   Electrodes   Computer simulations  

摘要： The current installations of sensors in the liquid phase in digesters are usually not sufficient for the fast detection of disturbances. Thus, the application of strategies for process control is restricted. In this paper, multiparameter (micro-) sensors as novel process analytical tools are introduced, which are coupled with wireless data transmission and are designed for an easy integration into digesters. Furthermore, the combination with a lance-based sampling 8-system,which enables sampling in the core of the liquid phase, is described. The monitoring and sampling devices allow for the measurement at various positions in the liquid phase for the purpose of the identification of gradients. Three case studies were performed: (i) at an open hydrolysis basin) (ii) a mid-sized biogas plant with a concrete roof, and (iii) a larger biogas plant equipped with a flexible roof. Online Measurements of the redox potential and offline analysis of the dry matter, ammonia, and acetic acid concentrations indicate plant-specific gradients, which appear in the liquid phase. Thus, the concept is not only suitable to improve the monitoring in digestion processes but also to identify the most suitable locations for installing sensors and sampling ports for a fast detection of process disturbances.

关键词： DSP   无位置传感器   控制技术  

摘要： 无位置传感器控制系统是指利用电机绕组中的有关电信号,通过适当方法估计出转子的电气和机械位置以及转速等,从而取代传感器,实现电机的闭环控制。随着控制技术的不断进步以及数字信号处理器等一些新元器件的出现,无位置传感器控制技术在交流伺服系统中获得了广泛应用和发展,尤其DSP 的高速信息处理能力使无位置传感器控制技术的复杂算法能得以实现。

关键词： MSP430单片机   无线传感网络   居家照护   Zigbee  

摘要： 本文主要基于MSP430单片机实验系统及Zigbee传感器与无线局域网设计了一种居家照护系统,该系统以无线通信技术来测量生理指标的传感器为核心,设计了一种可扩展的照护系统体系结构模型。该系统可以应用于家庭以及医院病房,构成远程的家庭、社区以及医院的医疗监护系统。

关键词： 液压技术   控制技术   计算机技术   微电子技术   传感器技术   高科技技术   机械技术   控制性能  

摘要： 它是集计算机技术、微电子技术、传感器技术、机械技术和液压技术为一体的高科技技术，它是液压技术的一次飞跃，为液压技术和控制技术带来了崭新的活力。它优良的控制性能超过了传统液压及控制技术，由于它能广泛的应用到国民经济各领域中，