期刊文献+
共找到5篇文章
< 1 >
每页显示 20 50 100
低学段培智生有效点数能力培养的策略研究
1
作者 王吉燕 《教育界》 2021年第4期43-44,共2页
数学学习是培智生参与社会生活的基础,他们要想知道时间,需要会看钟表;要想坐车出行,需要会购票刷卡;要想购物,需要会使用钱币,等等。这些技能是培智生适应社会生活必须具备的,而点数则是掌握这些技能的基础。本文从材料聚注意、榜样树... 数学学习是培智生参与社会生活的基础,他们要想知道时间,需要会看钟表;要想坐车出行,需要会购票刷卡;要想购物,需要会使用钱币,等等。这些技能是培智生适应社会生活必须具备的,而点数则是掌握这些技能的基础。本文从材料聚注意、榜样树方法、情境重自主、生活激热情四个维度分析提升培智生点数能力的方法,以期促进其更好地适应生活、适应社会。 展开更多
关键词 培智生 点数能力 培养策略
下载PDF
A Secure-Efficient Data Collection Algorithm Based on Self-Adaptive Sensing Model in Mobile Internet of Vehicles 被引量:1
2
作者 LIANG Wei RUAN Zhiqiang +1 位作者 TANG Mingdong LI Peng 《China Communications》 SCIE CSCD 2016年第2期121-129,共9页
Existing research on data collection using wireless mobile vehicle network emphasizes the reliable delivery of information.However,other performance requirements such as life cycle of nodes,stability and security are ... Existing research on data collection using wireless mobile vehicle network emphasizes the reliable delivery of information.However,other performance requirements such as life cycle of nodes,stability and security are not set as primary design objectives.This makes data collection ability of vehicular nodes in real application environment inferior.By considering the features of nodes in wireless IoV,such as large scales of deployment,volatility and low time delay,an efficient data collection algorithm is proposed for mobile vehicle network environment.An adaptive sensing model is designed to establish vehicular data collection protocol.The protocol adopts group management in model communication.The vehicular sensing node in group can adjust network sensing chain according to sensing distance threshold with surrounding nodes.It will dynamically choose a combination of network sensing chains on basis of remaining energy and location characteristics of surrounding nodes.In addition,secure data collection between sensing nodes is undertaken as well.The simulation and experiments show that the vehicular node can realize secure and real-time data collection.Moreover,the proposed algorithm is superior in vehicular network life cycle,power consumption and reliability of data collection by comparing to other algorithms. 展开更多
关键词 wireless vehicle network datacollection protocol network sensing chain self'-adaptive sensing sensing distance threshold.
下载PDF
FPGA Based Wireless Multi-Node Transceiver and Monitoring System
3
作者 Ozkan Akin ilker Basaran +2 位作者 Radosveta Sokullu lrfan Alan Kemal Biiytikkabasakal 《Journal of Mathematics and System Science》 2012年第1期53-57,共5页
In recent years the variety and complexity of Wireless Sensor Network (WSN) applications, the nodes and the functions they are expected to perform have increased immensely. This poses the question of reducing the ti... In recent years the variety and complexity of Wireless Sensor Network (WSN) applications, the nodes and the functions they are expected to perform have increased immensely. This poses the question of reducing the time from initial design of WSN applications to their implementation as a major research topic. RF communication programs for WSN nodes are generally written on microcontroller units (MCUs) for universal asynchronous receiver/transmitter (UART) data communication, however nowadays radio frequency (RF) designs based on field-programmable gate array (FPGA) have emerged as a very powerful alternative, due to their parallel data processing ability and software reconfigurability. In this paper, the authors present a prototype of a flexible multi-node transceiver and monitoring system. The prototype is designed for time-critical applications and can be also reconfigured for other applications like event tracking. The processing power of FPGA is combined with a simple communication protocol. The system consists of three major parts: wireless nodes, the FPGA and display used for visualization of data processing. The transmission protocol is based on preamble and synchronous data transmission, where the receiver adjusts the receiving baud rate in the range from min. 300 to max. 2400 bps. The most important contribution of this work is using the virtual PicoBlaze Soft-Core Processor for controlling the data transmission through the RF modules. The proposed system has been evaluated based on logic utilization, in terms of the number of slice flip flops, the number of 4 input LUTs (Look-Up Tables) and the number of bonded lOBs (Input Output Blocks). The results for capacity usage are very promising as compared to other similar research. 展开更多
关键词 FPGA PICOBLAZE RF MULTI-NODE WIRELESS TRANSCEIVER
下载PDF
Multi-functional stretchable and flexible sensor array to determine the location, shape, and pressure: Application in a smart robot 被引量:10
4
作者 HAN LiBiao DING JianNing +4 位作者 WANG Shuai XU Jiang YUAN NingYi CHENG GuangGui LIU ZunFeng 《Science China(Technological Sciences)》 SCIE EI CAS CSCD 2018年第8期1137-1143,共7页
The rapid increase in the aging population prompts the development of wearable devices and sophisticated robots. With their ability to collect complex information about their surroundings via e-skins, robots could per... The rapid increase in the aging population prompts the development of wearable devices and sophisticated robots. With their ability to collect complex information about their surroundings via e-skins, robots could perform more dynamic and variable tasks such as rescue missions or caring for the elderly. In this paper, we present a new concept of utilizing a very simple, highly flexible and stretchable capacitor sensor array, that can be attached on the surface of a retractable robot hand to realize three functions: determining the location, shape, and pressure of an object. This adaptive sensing system is accomplished using capacitors connected by aligned carbon nanotube(CNT) films constructed on an elastomer dielectric material, which can reduce the requirement on the accuracy of the machine vision system. This study has a very broad application in the manufacture of intelligent software robots. 展开更多
关键词 sensor array STRETCHABLE location shape pressure
原文传递
Nonlinear spectral-like schemes for hybrid schemes 被引量:7
5
作者 HE ZhiWei LI XinLiang LIANG Xian 《Science China(Physics,Mechanics & Astronomy)》 SCIE EI CAS 2014年第4期753-763,共11页
In spectral-like resolution-WENO hybrid schemes,if the switch function takes more grid points as discontinuity points,the WENO scheme is often turned on,and the numerical solutions may be too dissipative.Conversely,if... In spectral-like resolution-WENO hybrid schemes,if the switch function takes more grid points as discontinuity points,the WENO scheme is often turned on,and the numerical solutions may be too dissipative.Conversely,if the switch function takes less grid points as discontinuity points,the hybrid schemes usually are found to produce oscillatory solutions or just to be unstable.Even if the switch function takes less grid points as discontinuity points,the final hybrid scheme is inclined to be more stable,provided the spectral-like resolution scheme in the hybrid scheme has moderate shock-capturing capability.Following this idea,we propose nonlinear spectral-like schemes named weighted group velocity control(WGVC)schemes.These schemes show not only high-resolution for short waves but also moderate shock capturing capability.Then a new class of hybrid schemes is designed in which the WGVC scheme is used in smooth regions and the WENO scheme is used to capture discontinuities.These hybrid schemes show good resolution for small-scales structures and fine shock-capturing capabilities while the switch function takes less grid points as discontinuity points.The seven-order WGVC-WENO scheme has also been applied successfully to the direct numerical simulation of oblique shock wave-turbulent boundary layer interaction. 展开更多
关键词 group velocity control hybrid WENO shockwave-turbulent boundary layer interaction direct numerical simulation
原文传递
上一页 1 下一页 到第
使用帮助 返回顶部