基于机器人大赛的高校科创平台建设研究

创新创业平台的建设不仅在培养创新人才方面具有很强的现实意义,同时高校思想政治工作者和专业教师能够更好有针对性地对大学生创新创业进行引导和培育。科创竞赛与理论教学的区别是更注重学生多元化的成长,打造一个合适的平台——既能够给学生以专业知识的汲取,同时能够发现每个学生所长。本文研究并梳理总结厦门大学芙蓉隧道4号洞的做法经验。经过多年的探索,该基地在大学生创新创业、学业竞赛方面获得一定经验。福建省高等教育教学改革研究项目“项目导向型的机器人方向的大学生创新创业、学科竞赛全开放平台建设”（JAS151232

Field map-based rectification of susceptibility distortion and signal compensation in diffusion tensor imaging

目的采用基于体素的场图对磁共振弥散张量成像(diffusion-tensor; imaging,DTI)进行几何变形矫正及信号补偿研究,扩大DTI临床研究及应用价值。材料与方法获取29名健康人脑场图,分别对其DTI进行相位反; 卷积计算及信号校准补偿,将结果配准到3D结构图像。选择对磁场敏感的双侧颅底额叶和颞叶作为观察脑区,对磁场不敏感的丘脑作为对照脑区,对部分各向异性; (fractional; anisotropy,FA)值及信号的差异及其与结构像的形态差异进行统计分析。结果在颅底额叶和颞叶,DTI的磁敏感变形得到了矫正,因场不均性导致; 的信号损失得到了补偿。结论高场中DTI的畸变及体素信号丢失可应用场图的校准得到明显矫正,有利于进一步扩大高场DTI在临床中的应用价值。Objective: This study was designed to employ the voxel-based field map; to rectify the geometric deformation and compensate the signal loss of; diffusion tensor imaging (DTI), and thus facilitate the studies and; clinical applications of DTI. Materials and Methods: Brain field maps; from 29 healthy persons were first used to get B1 field heterogeneous; signals, and then the compensation and phase disconsolation of signals; were performed. Finally, the geometry deformations of DTI were rectified; and registered to 3D images. Magnetic sensitive bilateral temporal lobes; and frontal lobes were selected as regions of interesting and meanwhile,; magnetic insensitive thalamus was selected as control area. Results:; Geometry deformations of DTI produced by different susceptibilities; between specific tissues were completely rectified, and thus the signal; loss was compensated and the accuracy of DTI was significantly enhanced.; Conclusion: Signal compensations and deformation rectifications can be; well achieved using field map, which may improve the applications of DTI; in neurosurgery.国家自然科学基金面上项

Measuring the mechanical properties of micro-cantilever sensors

利用一种静态和两种动态的检测技术,对红外辐射探测微悬臂梁式传感器材料的弹性模量进行了测试研究.在静态检测实验中,利用纳米硬度计直接测出传感器材料的弹性模量;在动态实验中,分别利用谱平面光学滤波法和多普勒测振仪得到微悬臂梁传感器结构的固有频率,再结合数值模拟计算求出传感器的等效弹性模量.通过几种检测结果的分析和比较,获得了更加精确的微梁传感器单元的弹性模量值,为微梁的优化设计和评估提供了可靠的参数

Data-driven Health Status Prediction of the Hydraulic Turbine Governing System

水轮机调速系统是水轮发电机组的关键控制系统。运用故障树与专家系统相结合的方法对调速系统可能发生的故障进行诊断,并基于历史数据,挖掘与故障相关的可能因素,对专家系统无法解决的故障进行分析,构建了基于数据驱动的水轮机调速系统健康状态预测系统。The hydraulic turbine governing system is the key control system of the hydro-turbine generator unit. In this paper,the fault tree method and the expert system are combined to predict the potential faults of the governing system.Based on the historical data,a data-driven health status prediction system is developed for the hydraulic turbine governing system to detect the possible factors of the faults and analyze the unsolved faults

The Principle of Electric Hot Milling and Its Experimental Verification

提出了一种通电加热铣削方法,介绍了其基本原理与实验装置。通过试验及分析用小波变换处理采集到的振动信号来证明这种方法能够大幅降低切削过程的振动,提高刀具寿命,降低表面粗糙度,并且成本低、实验装置简单实用。提出了一种基于通电加热的新型高温硬度测量方法,用该方法分析淬火钢在高温下的硬度变化情况,发现常温57HrC的淬火T10A工具钢在300℃左右,硬度就急剧降低至30HrC,这也证明了加热切削的有效性。A new electric hot milling method is proposed firstly,and then this paper has proposed the theory and the experimental device of the new method.It has been proved by experiment and analyzing the vibration signal processed by wavelet transform on the new method that it really can significantly reduce the vibration and increase the tool life in milling process.And it also can reduce the surface roughness of the material.Besides,the device is not only cheap but also simple and practical.A new high-temperature hardness measurement method based on electric hot technology is proposed.The change of hardness at high temperature of the hardened steel has been analyzed.The hardness of T10 A carbon tool steel which has been hardened is nearly 57 HRC in normal atmospheric temperature,but the hardness drastically reduce to hardness 30 HRC when the material is heated to 300 ℃.So the efficiency of the new electric hot milling method has also been proved.国家自然科学基金项目(50875120)资

武夷山市洲庵遗址考古发掘简报

洲庵遗址位于福建省城村汉城遗址西南2公里处,2013年被调查发现。随后对其进行抢救性考古发掘,共发现汉代房址1处,宋代灰坑6个、窑炉3座,出土一批汉代、宋代建筑材料、陶瓷器标本,这为研究..

Kinetics study on decolorization of Reactive Red KN-3B by Citrobacter sp. CK3

采用脱色菌CITrObACTEr SP. Ck3,以活性红kn-3b染料为处理对象,在厌氧批式反应条件下,系统考察了PH值,温度和染料浓度对脱色反应速度的影响;通过动力学模拟及反应过程中染料的uV-VIS扫描图分析,探讨了脱色反应机理。结果表明:CITrObACTEr SP. Ck3对活性红kn-3b的脱色反应的适宜PH为7~9;脱色反应速度在温度为32℃时达到最大。染料初浓度从57 Mg/l逐渐增大到458 Mg/l时脱色率逐渐降低。脱色过程中染料的偶氮键发生断裂,脱色反应符合二级反应动力学。The kinetic modeling and mechanism with which Citrobacter sp.CK3 removed the textile dye,C.I.Reactive Red 180,from aqueous solution was investigated using different parameters,such as initial dye concentration,pH and temperature.In anaerobic batch experiments,the decolorization efficiency decreased with increase in initial dye concentration.The high decolorization rate was observed at pH of 7～9 and temperature of 32℃.The decolorization followed a second order kinetic model.The UV-Vis spectra analysis revealed that the decolorization process was azo bond cleaved reaction.深圳市科技计划项目深港创新应用研发专题资助(08Lh-04);福建省科技计划项目资助(2009Y0048

脑型肝豆状核变性脑皮层及皮层下核团体积的磁共振研究

目的探索脑型肝豆状核变性患者脑灰质的损害。材料与方法采集30例初发且未经治疗的脑型肝豆状核变性患者脑3D T1WI图像,利用FSL软件,运用基于体素的形态学测量(voxel_based morphometry,VBM)对脑皮层...国家自然科学基金项目(编号:81671674、81871519)~

Citrobacter sp. CK3对活性红KN-3B的脱色反应动力学研究

采用脱色菌Citrobacter sp. CK3,以活性红KN-3B染料为处理对象,在厌氧批式反应条件下,系统考察了pH值,温度和染料浓度对脱色反应速度的影响;通过动力学模拟及反应过程中染料的UV-Vis扫描图分析,探讨了脱色反应机理。结果表明:Citrobacter sp. CK3对活性红KN-3B的脱色反应的适宜pH为7～9;脱色反应速度在温度为32℃时达到最大。染料初浓度从57 mg/L逐渐增大到458 mg/L时脱色率逐渐降低。脱色过程中染料的偶氮键发生断裂,脱色反应符合二级反应动力学

三种检测方法对样品中沙门氏菌的检测结果比较

本实验采用VIDAS、API20E和SN0170-92三种不同的检测方法对CNCA举行的食品中常见致病菌能力验证计划中提供的一份盲样进行检验,总结对比了3种不同检验方法对沙门氏菌检测的各自优缺点