13 research outputs found
Analysis of Clearance Information Platform Based on RFID between Guangdong and Hong Kong and Study on Its Key Technologies
RFID技术是一种非接触式、无须人工干预、可识别运动物并可同时识别多个标签的识别技术。RFID标签具有防水、防磁、耐高温、不怕污染,使用寿命长、读取距离远等优点,并且标签上的数据还可以加密、存储数据容量大、存储信息更改自如,RFID的这些优点非常适合应用于物流通关过程中的信息采集。将RFID技术引入到物流通关流程中,通过建设基于RFID的物流通关信息平台,特别是报关、报税、进出口商品检验检疫等系统与企业业务系统的对接,可以简化海关、税务、检验检疫等行政管理部门的工作,提高工作效率,从而提高物流通关效率。本论文对基于RFID的粤港物流通关信息平台进行了分析,并研究了相关的关键技术。在平台的分析过...RFID is an acronym for radio frequency identification, which is a wireless communication technology. RFID tag has many characteristics, for example water-repellent, antimagnetic, fire-resistant, the reserves big,the secrecy good and the secrecy good, which is applicable to information acquisition during the clearance. RFID technology is introduced in the process of clearance, which can simplify th...学位:工学硕士院系专业:管理学院管理科学系_系统工程学号:1772006115137
基于降维动态观测器的一类多项式系统的非线性H_∞控制
针对一类存在外部扰动的多项式系统,研究了基于动态观测器的非线性H_∞控制设计问题.根据该类系统的结构特征,对线性时不变系统中动态观测器形式进行推广,构造出相应的非线性降维动态观测器.借鉴变量替换法研究思路,采用Lyapunov稳定性结合多项式平方和(SOS)凸优化理论,推导出该非线性H_∞控制问题的可解性条件和控制器构造方法.以质量弹簧阻尼系统为数值仿真实例,验证了所得结论的可行性和有效性.国家自然科学基金(61374037,61673325);;福建省自然科学基金(2015J01650,2016J01267);;福建省教育厅中青年教师教育科研项目(JAT170426);;厦门理工学院高层次人才项目(YKJ16024R
一种基于微电极的珊瑚共生体光补偿点测定方法探讨
珊瑚虫与虫黄藻互利共生形成共生体,虫黄藻通过光合作用为珊瑚虫提供重要的能量来源。珊瑚共生体的光补偿点可以较好地指示珊瑚的光适应性,是重要光合特性指标,但其测定方法鲜有报道。利用溶氧微电极结合光强可调节光源,以鹿角杯形珊瑚为实验材料,依据扩散平衡理论,建立了一种造礁石珊瑚的光补偿点的测定方法。实验结果表明珊瑚的扩散边界层溶氧浓度会快速响应光强变化。珊瑚扩散边界层溶氧浓度与光合有效辐射具有较好的相关性,且光强由高降低过程测得的相关系数更高。实验测得鹿角杯形珊瑚的光补偿点较低,为1.52μE/m~2/s,与喜阴植物的光补偿点相当。相对较低的光补偿点利于珊瑚栖居于水深范围更广的区域,有助于扩展珊瑚的生态位。溶氧微电极相关技术和方法在珊瑚光合作用研究中具有广泛的应用前景。中国科学院战略性先导科技专项A(XDA13020300)国家自然科学基金(41676163; 41406191; 41276113; 41276114)国家重点研发计划(2017YFC0506301,2018YFC1406500)广州市珠江科技新星(201806010017
新疆蓝刺头抗肿瘤活性部位的初筛研究
目的通过体外实验从新疆蓝刺头3种提取物中筛选出体外抑瘤作用最佳的提取部位。方法MTT法测定样品对肿瘤细胞生长的抑制作用。结果两批实验均显示新疆蓝刺头乙醚提取物(L1)对HCT-8、BGC823和HeLa细胞的生长有较强的抑制作用,其对3种肿瘤细胞的半数抑制浓度(IC50)平均为763.2、371.8、867.6μg/mL;乙醇提取物(L3)和水提取物(L2)作用较弱。结论新疆蓝刺头乙醚提取部位可能含有其主要的抗肿瘤活性成分
Advantages of double-embedding with agar and paraffin in making light microscope slices of small vessels
预先将固定好的小血管包埋到1.5%琼脂中,调整好其位置和管腔。采用自制的琼脂包埋模子可以方便快捷的获得结构完整大小适中的组织琼脂块。再按照常规的的脱水包埋程序做石蜡包埋,最后切片染色。结果显示,琼脂石蜡双包埋法保持了小血管管腔的完整性和规则性,内膜等组织结构几乎没有损坏和丢失,最终得到较为理想的光镜切片。The fixed small vessels were pre-embedded into 1.5% agar in advance,and its position and lumen were adjusted well.By using self-made agarembedding mould,the agar block in complete structure and right size could be obtained conveniently.Then paraffin embedding was done according to the conventional dehydration and embedding procedure,and staining was the last step.The results indicated that,by using the double embedding method,the integrity of lumen was kept,the intima and other tissues of vessel were not damaged and lost,the ideal light microscope slices were gotten ultimately.国家重点基础研究发展规划项目资助(973计划项目)(编号:2012CBA01303
Prevalent rate of neurological soft signs in patients with depression
目的:探讨抑郁症患者的神经软体征的行为学特征。方法:以68例符合美国精神障碍诊断与统计手册第4版(DSM-IV)诊断标准的门诊或住院抑郁症患者及68名健康对照为研究对象,采用剑桥神经科检查(CNI)软体征测试分量表,从运动协调、感觉整合、抑制功能三方面对两组对象进行神经软体征的行为学测查。并使用汉密顿抑郁量表(HAMD)评估抑郁症患者的病情严重程度。本调查中所有患者均处于抑郁缓解期,且均正在接受抗抑郁药物的治疗。结果:抑郁症组的HAMD平均得分为(18.2±7.8)。抑郁症组与对照组的神经软体征测试总分[(3.2±2.8)vs.(3.5±2.6)]、运动协调分[(0.9±1.3)vs.(1.2±1.6)]、感觉整合分[(1.5±1.5)vs.(1.3±1.0)]、抑制功能分[(0.8±0.9)vs.(0.9±1.0)]差异均无统计学意义(均P>0.05)。结论:本研究显示处于抑郁缓解期并接受抗抑郁药物治疗的抑郁症患者与健康对照的神经软体征整体表现基本一致。Objective: To compare the prevalent rates of neurological soft signs (NSS) in patients with de- pression with those of normals. Methods: Sixty-eight in-and outpatients with depression and 68 demographically matched healthy controls took part in the study. All patients were diagnosed by experienced psychiatrists according to the Diagnostic and Statistical Manual of Mental Disorders-IV, Fourth Edition (DSM-IV) criteria, and the severity of their depression was assessed with the Hamilton Depression Scale (HAMD). In addition, all patients were in the remission stage and were receiving anti-depression treatment. The NSS subscales (motor coordination, sensory inte- gration, and disinhibition) of the Cambridge Neurological Inventory (CNI) were administered to all patients and healthy controls. Results: The mean score of HAMD in patients was ( 18.2 ± 7. 8). No significant group differences were found for the total score of NSS [ (3.2 ± 2. 8) vs. (3.5 ± 2. 6) ] and the subscale scores of motor coordination [ (0. 9 ± 1.3) vs. ( 1.2 ± 1.6) ], sensory integration [ ( 1.5 ± 1.5) vs. ( 1.3 ± 1.0)] and disinhibition [ (0. 8 ± 0. 9) vs. (0. 9 ±1.0)]. Conclusion: It suggests that the prevalent rates of neurological soft signs in patients with remis- sion depression and healthy controls may be similar
Interferometric Projection Fourier Transform Profilometry Based on Cube Beam Splitting Prism
CFSR、ERA-Interim和MERRA降水资料在中亚地区的适用性/Applicability study of CFSR, ERA-Interim and MERRA precipitation estimates in Central Asia[J]
利用中亚1979-2011年间162个观测站点月降水数据(OBS),以平均偏差(MBE)、相关系数(R)、平均绝对误差(MAE)和均方根误差(RMSE)对CFSR、ERA-Interim和MERRA气象再分析降水数据在中亚地区的适用性进行评估.结果表明:(1)3套数据的模拟效果存在明显差异.其中MERRA的模拟精度最高(R=0.71),ERA-Interim次之(R=0.53),CFSR最低(R=0.50);体现出3套数据不同的同化方案和数据源导致模拟效果的不同;(2)降水的年内变化上,3套再分析数据之间具有较好的一致性,但对OBS均表现出高估,并且对强降水月份(3,4月)高估幅度最大;(3)3套数据对海拔500~1 000m地区的降水模拟精度最好,超过1000m后,随海拔升高模拟精度下降.以上规律可为3套数据的订正及其在中亚地区气候变化研究中的应用提供科学依据
Expertadvice on the diagnosis and intervention of Chinese developmental dyslexia
发展性阅读障碍是一种以儿童阅读能力显著落后于年龄和智力应有水平为主的障碍,属于具有遗传基础的神经发育性障碍。目前国内对发展性阅读障碍的评估、诊断与干预多出现在科研场合,临床诊疗和教育性质的应用明显不足。专家意见采用专家书面反馈意见和视频会议讨论的形式,以发展性阅读障碍的病因学基础为指导,对发展性阅读障碍的临床表现、诊断流程及干预原则等形成统一意见,旨在为相关专业领域医师和康复专业人员提供参考和帮助,亦为开展对发展性阅读障碍的教育性干预活动提供参考。</p