基于物联网技术和Android系统的智能宿舍的设计与实现

在物联网技术和Android系统的基础上,以学生宿舍为研究对象,建立一个对学生宿舍环境实时监测与家电管理的智能化系统。该系统以ZigBee近距离无线传输协议组建宿舍控制监测网络,采用CC2530作为子节点核心控制处理器,实现宿舍的灯光、空调、窗帘、安防、空气监测等智能化控制,并通过增设服务器以及开发Android应用程序,实现手机或笔记本远程对宿舍中的设备进行监测和控制。实践表明,所提出的智能宿舍解决方案,顺应时代与科技的发展方向,在改善学生学习和生活环境的同时,增强用户体验,具有较高的市场前景和实用价值。

Pattern recognition of optimal traffic path based on HMM

In order to alleviate urban traffic congestion and provide fast vehicle paths,a hidden Markov model(HMM)based on multi-feature data of urban regional roads is constructed to solve the problems of low recognition rate and poor instability of traditional model algorithms.At first,the HHM is obtained by training.Then according to dynamic planning principle,the traffic states of intersections are obtained by the Viterbi algorithm.Finally,the optimal path is selected based on the obtained traffic states of intersections.The experiment results show that the proposed method is superior to other algorithms in road unobstruction rate and recognition rate under complex road conditions.

固定化海洋脲酶制备及其在尿素废水处理中的应用

为确定合适的海洋碱性脲酶固定化方案,并对固定化脲酶的尿素废水处理效果进行评估。分别用 3 种材料对脲酶进行包埋,测定其固定化效果及酶学性质,并筛选出最佳方案装柱运行。结果表明:采用海藻酸钠-CaCl2 包埋效果最佳,其固定化率达 61.47%,酶的最适温度从 55℃提高至 70℃,最适 pH 从 8.5 提升至 9.5,在 35-85℃保存 30 min 或在 pH 7-10.5 保持 6 h 后酶活仍能保持在 90%以上,在 4℃保存半衰期超过 3 个月。处理装置在 70℃时,尿素废水流量达 19 mL/min,且初始尿素降解率为 90.25%,连续运转 35 d 效率不变。游离脲酶经海藻酸钠固定化后最适温度、pH 及耐热性、耐碱性提升最显著;运用该固定化海洋脲酶进行尿素废水处理是除化学法外一条有效途径。

Comparison of life cycle performance of distributed energy system and conventional energy system for district heating and cooling in China

The distributed energy system has achieved significant attention in respect of its application for singlebuilding cooling and heating.Researching on the life cycle environmental impact of distributed energy systems(DES)is of great significance to encourage and guide the development of DES in China.However,the environmental performance of distributed energy systems in a building cooling and heating has not yet been carefully analyzed.In this study,based on the standards of ISO14040-2006 and ISO14044-2006,a life-cycle assessment(LCA)of a DES was conducted to quantify its environmental impact and a conventional energy system(CES)was used as the benchmark.GaBi 8 software was used for the LCA.And the Centre of Environmental Science(CML)method and Eco-indicator 99(EI 99)method were used for environmental impact assessment of midpoint and endpoint levels respectively.The results indicated that the DES showed a better life-cycle performance in the usage phase compared to the CES.The life-cycle performance of the DES was better than that of the CES both at the midpoint and endpoint levels in view of the whole lifespan.It is because the CES to DES indicator ratios for acidification potential,eutrophication potential,and global warming potential are 1.5,1.5,and 1.6,respectively at the midpoint level.And about the two types of impact indicators of ecosystem quality and human health at the endpoint level,the CES and DES ratios of the other indicators are greater than1 excepting the carcinogenicity and ozone depletion indicators.The human health threat for the DES was mainly caused by energy consumption during the usage phase.A sensitivity analysis showed that the climate change and inhalable inorganic matter varied by 1.3%and 6.1%as the electricity increased by 10%.When the natural gas increased by 10%,the climate change and inhalable inorganic matter increased by 6.3%and 3.4%,respectively.The human health threat and environmental damage caused by the DES could be significantly reduced by the optimization of natural gas and electricity consumption.

基于GNU Radio和USRP的体域网收发机设计

为实现新兴无线医疗监测技术的普及,提出基于IEEE 802.15.6协议的无线体域网收发系统。该网络具有高速率、高可靠性、可重构和低功耗等特点,很好契合了人体医疗检测技术需求。为缩短产品的设计周期,提出在开源软件定义无线电平台和通用软件无线电外设上实现窄带物理层收发系统设计。实验结果表明,该系统可灵活切换调制方式,信噪比在11 dB时系统误包率低于1%。

New Mine Geological Environment Impact Assessment Method

Building an assessment framework and corresponding index system applicable to geological environment impact assessment(GEIM) for new mines contributes to supervision and protection of the geological environment of mines. Taking GEIM of a limestone mine to be built in Chongzhou as a case, this study, by making use of analytic hierarchy process and subsequent transformation from qualitative to quantitative variables, established the quantitative assessment and the zoning assessment system in terms of the following four aspects, namely geological environment of the mine, geological disaster risks, the influence of mining on groundwater environment, and its impact on land and landscape resources. The current study employed multi-objective linear weighting function to form mathematical model and then worked out environmental quality scores and the zonations, which were expected to reflect the characteristics of the geological environment of the mine. Besides, the assessment results were analyzed so as to provide important reference for predictions on possible environmental impact brought by the mine and for comprehensive treatment of the geological environment.

基于深度学习的股价趋势预测研究

金融市场迅速发展,民众投资意识不断增强,股票成为一个极为广泛的投资手段,股票价格的分析预测对社会发展和民众投资具有重要意义.针对股票价格易受其他因素影响的问题,本文基于ARIMA与GRU建立了一种股票价格预测模型.根据股票价格涨跌变化规律,使用ARIMA模型抓取数据的线性特征,使用GRU模型抓取数据的非线性特征,选取合适的参数以及网络优化算法调整网络以获得更好结果,其后与其他模型的预测结果进行了对比.实验结果表明:文中所采用的预测算法效果好于单一模型预测效果,具有较好的实用性.

演艺装置艺术创意的新思路——机器孔雀在亚洲文化嘉年华演出中的呈现

介绍亚洲文化嘉年华大型综艺晚会中机器孔雀的艺术创意,以及机械运动机构、控制系统,说明艺术与技术融合的新思路。