Design and Analysis of Meeting Room Information Management System Based on Web

随着信息化技术的快速发展，建立相应的信息化管理系统已是组织内部现代化管理不可或缺的重要标志。会议是现阶段落实决策和解决问题的重要方式，一个单位尤其是具有行政色彩及复杂构建体系的组织，单位与单位之间以及单位内部更加注重会议的质量和效率，因此会议的前提——会议室管理的信息化水平将极大的提高会议管理工作的效率，特别是在频繁使用会议室的单位，这将会对于该单位推进对会议室的科学化管理，以及信息化还有规范化非常有利。 本文结合本单位是实际的工作情况，通过对单位内的会议室信息化管理系统分析了需求分析，采用一些软件工程的方法以及思想，设计并实现了会议室信息管理系统。本系统采用“PHP+MySQL+Tomca...With the rapid development of information technology, the establishment of the corresponding information management system is indispensable to modern management within the organization. Meeting is an important way to carry out the decisions and to solve current problems at the present stage, as a unit especially administrative and complex construct the system of organization will be pay more atten...学位：工程硕士院系专业：软件学院_工程硕士(软件工程)学号：X201223104

Hardware Design for the Lifting Based Wavelet Transform in JPEG2000

离散小波变换是当今许多图像处理和压缩技术的基础 ,并被最新的ISO/IEC静态图像压缩标准JPEG2 0 0 0所采用 .基于提升方法的离散小波变换比传统的基于卷积的运算量小 .我们为JPEG2 0 0 0中的小波提升算法提出一个硬件结构 ,该结构整体运算速度高 ,存储需求低 ,硬件资源耗费少 .我们提出在数据通道之外实现边界扩展 ,以降低数据通道的复杂性 ,提高运算效率 .我们通过采用流水线技术 ,进一步提高了硬件设计的运算效率 .Discrete Wavelet Transform(DWT) has become very popular as the basis of many recent image processing and compression techniques and has been adopted by new image compression standard,i.e.,JPEG2000.The conventional convolution based DWT is computationally intensive.Such drawbacks can be overcome by using the lifting based scheme for the DWT.We presented a novel hardware structure for lifting based wavelet transform in JPEG2000.The hardware structure improves memory/speed tradeoff.Its computation speed is high and memory requirement is low.The complexity of datapath is reduced and the efficency of the system is improved by implementing the function of edge extension outside of data path.In the datapath design,we used pipeline technique to further improve the efficiency of the design.中国人民解放军总装备部预研项目 (No .41 31 60 60 1 ) ;; “十五”国防基础微电子预研项目 (No .41 30 80 1 0 4 0 8

广东湛江红树林自然保护区及附近海岸互花米草入侵与红树林保护

对广东湛江红树林自然保护区范围内和周边区域的外来植物互花米草(Spartina alterniflora)的生长分布进行了实地调查。结果显示,雷州半岛东、西海岸均有互花米草的分布,总面积达12.6 hm~2,徐闻海安新港码头是互花米草在中国大陆分布的最南端。调查发现,互花米草和乡土红树植物的生态位重叠,虽然致密的红树林内未见互花米草的生长分布,但互花米草比乡土红树植物更耐淹水,表现为在光滩前沿低潮位仅有互花米草的分布。鉴于互花米草在雷州半岛分布范围广、生境类型多样、扩散增长迅速的现状,建议对互花米草应采取\"早发现,早清除\"的治理措施,并开展跟踪监测,及时掌握互花米草的扩散动态。国家自然科学基金项目(31770464

Preparation of Crack-free Inverse-opal Films by Template/Matrix Co-assembly

近年来,由于在光学、电学和生化等领域具有广泛的潜在应用,有序多孔反蛋白石结构薄膜的研究引起了人们的广泛关注.但是其在制备过程中常常会形成一些无法; 控制的缺陷,限制了这类材料的普及和实际应用.通过使用两种基质前驱体(正硅酸乙酯或丝素蛋白)与胶体小球混合共组装,探究了二元体系共组装法制备无裂痕; 反蛋白石结构薄膜的可行性.并用扫描电镜和可见光谱对薄膜结构进行了表征.结果表明,对于正硅酸乙酯体系,在不影响胶体小球有序排列的条件下,正硅酸乙酯; 在小球间的空隙中发生溶胶凝胶转变,与微球共同组装成有序致密的整体,去除微球模板后,可以得到大规模(>200; mum)无缺陷有序的反蛋白石结构薄膜.而对于大分子丝素蛋白体系,由于它和胶体小球有较强的相互作用力,会抑制胶体小球的有序组装,导致无法形成有序结; 构薄膜.对两种二元共组装体系进行了实验探索,实验结果不仅有助于人们了解共组装方式的适用范围,而且为设计和制备无缺陷反蛋白石薄膜提供了新的途径.Recently, there has been a significant interest in utilizing well-ordered, porous inverse-opal films for applications in optical, electronic and (bio) chemical fields. However, uncontrolled defects are always formed during their preparation process, which limit their practical applications. In this work, we examine the feasibility of using template/matrix co-assembly strategies to fabricate crack-free inverse opal thin films. Polystyrene spheres (PS) are chosen as a colloidal template, and two matrix precursors [tetraethoxysilane (TEOS) precursor and regenerated silk fibroin solution] are used for the current study. Our scanning electron microscope (SEM) and optical spectrum results show that, for the TEOS-based system, the resulting silica gel due to the sol-gel transition of TEOS can effectively fill the gap between particles, but cannot affect the self-assembly of PS colloidal particles. After selective removal of the PS template, centimeter-scale crack-free and well-ordered inverse opal films can be obtained. In addition, for a constant concentration of TEOS, the film thickness and order degree of structure can be simply tuned by adjusting the concentrations of colloidal spheres. In comparison with indirect approach through template self-assembly and liquid infiltration, such a co-assembly approach can effectively minimize the associated cracking and avoid the need for matrix infiltration into the preassembled colloidal spheres. On the other hand, macro-molecule silk fibroin has a relatively strong interaction with PS colloidal particles, which is demonstrated by SEM and confocal images. Due to their interaction, silk fibroin molecules are preferably adsorbed on the surface of PS spheres, which can restrain the self-assembly of colloidal particles. As a result, it cannot form well-ordered silk film based on such co-assembly strategy. That is to say, the co-assembly approach is not suitable for systems that matrices have strong interactions with templates. These findings pave the way to use the template/matrix co-assembly strategy for rationally designing and developing crack-free inverse opal films and to apply such well-ordered and porous materials in a variety of fields.National Natural Science Foundation of China [21401154, U1405226]; 111; Project [B16029]; Natural Science Foundation of Guangdong Province; [2014A030310005]; Fundamental Research Funds for the Central; Universities of China [20720170011

Design and measurements of the high gradient accelerating structures

The purpose of this thesis was to study on design and measurements of the high gradient accelerating structures. After introducing the main parameters to characterize Linacs we explained the application of the periodic accelerating structure. Then we studied TW accelerating structure operating at K-band frequency in order to linearize longitudinal space phase to increase beam brightness in the framework of the Compact Light XLS project in order to produce hard x-ray. We estimated group velocity as a function of frequency both analytically and numerically. Analytical results have a good agreement with the numerical results. The main parameters such as shunt impedance, quality factor (Geometric factor) and R/Q independently from the operating frequency for the TM010, TM110 and TM011 for a single cylindrical “pill-box” have been determined analytically as they provide accurate model for the accelerating structures. In order to characterize a normal conducting high accelerating structure with maximum gradients operating at X-band with extremely low probability of RF breakdown, an electroformed SW structures has been fabricated and characterized by SLAC and INFN with collaboration of other institute around the world at 11.424 GHz, coated with Au-Ni. We designed a gold plate RF high gradient structure operating at the X- band coated with Au-Ni. Bench measurements have been performed in the Department of SBAI of the University of Rome “La Sapienza”. The Slater method for the SW cavity has been employed in order to quantify the electric field inside the structure. Comparing the results with the results exposed from HFSS we report the features that have been quantified, showing good agreement. We continued working on the perturbation effect due to the aperture coupled between a waveguide and a cavity but for our application in SW multi-cell high gradient accelerating structure we studied on theoretical approach for reflection coefficient calculation in a SW cavity coupled to a waveguide. One method was based on circuit theory in which we found the overall Q of a resonant circuit for a cavity coupled to an external waveguide containing the RF generator. Q calculation led to the determining of the shunt impedance and consequently the reflection coefficient calculation. Comparison of the results shows a good agreement with the numerical results carried out by using the numerical code, HFSS. Another method of reflection coefficient calculation has been accomplished. We applied the modified Bethe’s theory presented by Collin and developed by De santis, Mostacci and L.Palumbo for TM01 mode cavities coupled by a small hole with a thickness size comparable to the wavelength. The amplitudes of forward and backward waves due to polarizabilites have been determined and we found equations for reflection and transmission coefficients. We demonstrated that our equation for reflection coefficient calculation is an analogous of the reflection coefficient obtained by Collin for TE10 using the circuit theory

Attention characteristics of children with different clinical subtypes of attention deficit hyperactivity disorder

目的探讨注意缺陷多动障碍(AdHd)儿童不同亚型的注意力特征,为临床干预提供依据。方法对345例AdHd儿童进行分型,使用整合视听持续性操作测试(IVA-CPT)进行注意力评估,比较不同亚型的视觉和听觉注意力特征。以122例正常儿童作为对照。结果 3种亚型AdHd儿童综合注意力商数和综合控制力商数得分均明显低于正常儿童,差异有统计学意义(P<0.01);在控制力商数上,多动/冲动为主型(AdHd-HI)儿童听觉得分低于视觉,差异有统计学意义(P<0.05);在注意力商数、速度商数上,3亚型AdHd儿童听觉得分高于视觉,差异均有统计学意义(P<0.01);在谨慎商数上,视觉得分高于听觉得分,差异有统计学意义(P<0.01);不同亚型AdHd儿童之间听觉注意力相关商数和视觉注意力相关商数差别无统计学意义。结论 AdHd儿童注意功能低于正常儿童,且视觉注意功能受损重于听觉;不同亚型AdHd儿童在视觉和听觉注意力特征上的功能受损程度无差别。Objective To explore the attention characteristics of children with different clinical subtypes of attention deficit hyperactivity disorder(ADHD) and to provide a basis for clinical intervention.Methods A total of 345 children diagnosed with ADHD were selected and the subtypes were identified.Attention assessment was performed by the intermediate visual and auditory continuous performance test at diagnosis, and the visual and auditory attention characteristics were compared between children with different subtypes.A total of 122 normal children were recruited in the control group and their attention characteristics were compared with those of children with ADHD.Results The scores of full scale attention quotient(AQ) and full scale response control quotient(RCQ) of children with all three subtypes of ADHD were significantly lower than those of normal children(P<0.01).The score of auditory RCQ was significantly lower than that of visual RCQ in children with ADHD-hyperactive/impulsive subtype(P<0.05).The scores of auditory AQ and speed quotient(SQ) were significantly higher than those of visual AQ and SQ in three subtypes of ADHD children(P<0.01), while the score of visual precaution quotient(PQ) was significantly higher than that of auditory PQ(P<0.01).No significant differences in auditory or visual AQ were observed between the three subtypes of ADHD.Conclusions The attention function of children with ADHD is worse than that of normal children, and the impairment of visual attention function is severer than that of auditory attention function.The degree of functional impairment of visual or auditory attention shows no significant differences between three subtypes of ADHD

Distribution and Seasonal Variations of Chromophoric Dissolved Organic Matter （CDOM） in the Bohai Sea and the North Yellow Sea

UV-Vis spectral data and a fluorescence excitation-emission matrix (EEM) was analyzed for the surface, middle, and bottom layer water samples from the Bohai Sea and North Yellow Sea in April, August, and December of 2016 and February of 2017. Distribution characteristics, influencing factors, and seasonal variation of CDOM in the study area were investigated. The results showed that the horizontal distributions of CDOM are similar in different seasons, showing a characteristic of high levels near shore and low levels in the offshore region. Strong correlations were observed between value a (355) and spectral slope S275-295, indicating that CDOM is significantly affected by land input. According to the vertical distribution, the CDOM level is the lowest in surface seawater in summer due to strong photo-degradation. In February, controlled by primary productivity, the lowest level of CDOM was found in the bottom seawater. From April 2016 to February 2017, the content of CDOM first increased and then decreased. Its concentration was highest in December. Seasonal variations are mainly controlled by land input and on-site production. According to analysis of the spectral slope S275-295, the average molecular weight of CDOM in winter was smallest in February, which was mainly related to the drastic reduction of land-based input at that time. The strong photo-degradation in summer resulted in a small average molecular weight of CDOM