Design and Implementation of Digital Library Management System Based on B/S

在数字化、信息化时代下，建立现代的数字图书馆是如今公共图书馆的必然发展趋势。对于一个中型公共图书馆来说，为实现这一转变，实现社会知识的有效储藏和广泛推广，必须将传统的人工管理方式及信息分享方式向数字化、网络化、智能化转换，因此，引入一套完整的数字图书馆管理系统来提高管理和服务的效率十分必要。 本文通过研究数字图书馆的图书管理业务和读者服务需求，设计开发一个适合中型数字图书馆使用的管理系统。本文首先阐述了图书馆管理系统的研究背景和研究意义，并简单介绍了搭建本系统所使用的相关技术，包括B/S模式、Linux操作系统概述、MySQL数据库和Java语言；然后，对中型数字图书馆采编业务、典藏流通业务...In the digital and informative society, it is a trend to build modern public digital libraries. For a medium-sized public library, it is necessary to change the way of management and sharing information from manual to digital, networked and intelligent. Therefore, it is important to introduce a digital public library management system for more efficient public libraries. This thesis analyzes th...学位：工程硕士院系专业：软件学院_工程硕士(软件工程)学号：X201123096

国外生态城市近十年研究回顾——基于Citespace软件的可视化分析

低碳生态转型已成为目前我国城市发展的关键,以生态城市建设落实可持续发展也成为引导城市发展的重要手段。文章回顾了国际生态城市研究的发展历程,从文献时间及领域分布、代表人物及文章、研究前沿、研究趋势和主要研究内容5方面入手,将web of science核心数据库中2008~2017年近10年间关于生态城市的相关研究论文,利用Citespace软件进行可视化分析。研究发现,国外生态城市相关研究趋于向实证及数据分析方向发展,可持续发展、绿地空间及气候应对仍是研究热点。文章系统梳理近10年在\"城市研究\"领域的共2124篇相关文献,详细阐述\"生物多样性及生态系统服务\"\"气候变化应对及城市降温\"\"绿地及绿色基础设施\"\"城市规模与土地利用\"和\"可持续发展下的政府及公众参与\"共5个主要研究内容,以期为我国生态城市相关领域研究和实践提供借鉴。清华大学生态规划与绿色建筑教育部重点实验室基金(编号:2013U-5);;厦门大学中央高校基本科研业务费专项基金(编号:20720150107

Surface morphology and deformation mechanism of single crystal copper treated by laser shock peening

To study the relation between surface morphology and deformation mechanism of the target material under the shock, a flexible boundary loading, in laser shock peening(LSP), the macroscopic and microscopic surface morphology of a single crystal copper treated by LSP was investigated. The optical profilometer shows a 200-μm-deep pit forms on the shocked surface under LSP. The optical microscopy shows a set of parallel slip bands appear at the center of the shocked region and many vertical cross slip bands appear at the edge of shocked region. This indicates a large plastic deformation occurs by means of slip for the single crystal copper under LSP and the distributing features of slip bands correspond to the spatial distribution of the shock pressure. The results confirm that the surface morphology of materials under LSP can reflect the deformation mechanism and it can be a new method of studying the deformation mechanism of materials under LSP. © (2014) Trans Tech Publications, Switzerland

Determination of polycyclic aromatic hydrocarbons(PAHs) in tea using solid phase microextraction coupled gas chromatography mass spectrometry

本文优化了萃取条件,建立了顶空-固相微萃取(HS-SPME)、气相色谱-质谱测定茶叶中4种多环芳烃的方法.茶叶中多环芳烃含量和对应的信号强度在0.3~150mg kg~(-1)范围内呈良好的线性关系,检出限为0.1~0.2mg kg~(-1),回收率在72.6%~102.4%之间;茶汤中含量和对应的信号强度在0.01~10mg kg~(-1)范围内呈良好的线性关系,检出限为0.005~0.01mg kg~(-1),回收率为76.4%~103.6%.In this study, GC-MS coupled head-space solid-phase microextraction(HS-SPME) was applied to detect 4 kinds of PAHs in tea and in tea infusion. After the optimization of the experimental consideration, the linear ranges for the PAH4 signal intensity and their concentrations are found to be 0.3–150 and 0.01–10 mg kg~(-1). The detection limit is 0.1–0.2 and 0.005–0.01 mg kg~(-1), with recovery of 72.6%–102.4% and 76.4%–103.6%, respectively

肝脏管道供血分布及残肝体积的计算

在肝切除、肝移植等手术计划中,精确地计算残肝体积至关重要,它能够直接影响到手术的成败.文中结合临床上肝外科手术的术式,提出了能够实时、准确地计算出基于肝脏管道供血分布的残肝体积的算法.首先基于个体化肝脏CT数据,通过分割和细化2个步骤建立肝实质三维模型及肝内管道的抽象树状模型;在此基础上,通过人机交互灵活地选定肝内管道分支数目和分支起点,并基于多背景距离变换计算肝脏供血分布和各部分所占比例,从而得到准确的残肝体积.实验结果表明,该算法计算速度快,对肝切除结果的模拟和计算精度能满足实际临床需求,可为手术计划提供指导依据.国家自然科学基金(61001144,61102137,61271336

Clinical Observation of Different Regimens for Treatment Early Onset Preeclampsia

目的比较不同方案治疗早发型子痫前期的疗效和安全性。方法选取2013年5月至2016年10月在我院妇产科诊治的早发型子痫前期孕妇200例,根据随机数字表法分成4组,每组各50例:硫酸镁常规治疗组(A组);硫酸镁常规治疗+丹参注射液组(B组);硫酸镁常规治疗+低分子肝素组(C组);硫酸镁常规治疗+丹参注射液+低分子肝素组(D组)。观察各组脐动脉收缩压与舒张压比值(S/D)、平均动脉压、24h蛋白尿、分娩方式、延长孕龄时间、新生儿窒息率、母体并发症和不良反应等指标。结果①各组治疗后平均动脉压均显著降低,差异有统计学意义(均P0.05)。各组治疗后S/D均降低(均P0.05)。②与A组比较,B、C、D组终止妊娠孕周增加(均P0.05)。结论硫酸镁联合低分子肝素和/或丹参治疗早发型子痫前期疗效均优于硫酸镁常规治疗,且安全性不低于硫酸镁常规治疗。ObjectiveTo observe the efficacy and safety of different regimens in treatment early onset preeclampsia.Methods200cases of early onset preeclampsia patients admitted to our hospital were randomly divided into four groups,each group of50cases.group A:magnesium sulfate conventional treatment,group B:magnesium sulfate+salvia miltiorrhiza,group C:magnesium sulfate+low molecular heparin,group D:magnesium sulfate+salvia miltiorrhiza+low molecular heparin.The ratio of systolic and diastolic pressure of fetal umbilical artery(S/D),mean arterial pressure,24h proteinuria,mode of delivery,prolong gestational age,neonatal asphyxia,maternal complications and adverse reactions were compared among the four groups.Results①After treatment,the mean arterial pressure was significantly reduced(P<0.05),but there was no significant difference among groups(all P>0.05).Post treatment S/D decreased significantly(all P<0.05),D group post treatment S/D especially decreased(P<0.05).②Com pared with A group,B,C,D group termination of pregnancy increased gestational weeks(all P<0.05).③B,C,D groups prolonged gestational age and neonatal weight were higher than A group,however the rate of neonatal asphyxia was lower than that of group A(P<0.05).The gestational age of C and D groups were higher than that of group B,and the rate of neonatal asphyxia in group D was lower than that in group B(all P<0.05).④There were no significant difference in the incidence of maternal complications and adverse reactions among four groups(all P>0.05).ConclusionThe efficacy of magnesium sulfate combined with low molecular weight heparin and/or salvia miltiorrhiza in treatment early onset preeclampsia was better than that of magnesium sulfate,and the safety was not lower than that of magnesium sulfate.河南科技攻关项目(152102310086

Study of Mechanism and Design of Oxygen Micro-sensor Based on MEMS

【中文文摘】采用溶胶-凝胶(Sol gel)法制备氧敏感膜,并对其不同的药品配比进行成膜质量与响应时间的测试与比较。设计一系列实验对该传感器的氧敏感机理进行研究。结合MEMS技术,设计MOSFET氧气微传感器结构,在器件中集成了加热元件和测温元件。实验结果表明:该传感器响应时间快,有较高的灵敏度,较好的重复性、选择性和稳定性。该传感器的机理研究与设计为基于MEMS技术的氧气微传感器的深入研究提供一定的参考。 【英文文摘】Based on the theory of Solgel,YSZ sensitive membrane was made.And the quality and response time of solgel membranes with the different zirconia concentration were tested and compared.A series of experiments were designed to study the mechanism of oxygen sensitivity.Based on MEMS fabrication processing,the structure of MOSFET oxygen microsensor was presented.The heater and temperature sensor are integrated into the device.The experimental results indicate that the sensor possesses quick response time,relatively higher sensitivity,better repetition,selectivity and stability. The study of mechanism and the design of this sensor provides some reference for the in-depth study on the oxygen micro-sensor based on MEMSin the futur

基于SDAE的航空发动机燃油流量基线模型构建

为克服传统的基线模型算法(如BP神经网络算法)存在的泛化能力不高、鲁棒性差且容易陷入局部最优解等缺点,构建了基于堆叠降噪自动编码器(SDAE)的航空发动机燃油流量基线模型,利用民航发动机的真实飞行数据对基线模型进行训练与验证,并与基于BP神经网络的基线模型进行对比分析。结果表明:基于SDAE的燃油流量基线模型具有更高的精度和更强的鲁棒性。中央高校基本科研业务项目(20720180120)资

Development of New Coatings for Solid Phase Microextraction

作为一种样品前处理方法的固相微萃取(SOlId PHASE MICrOEXTrACTIOn,SPME)技术,具有操作方便、快速、灵敏和无需大量有机溶剂的优点,因此在分离分析方面得到了广泛的应用。涂层是SPME技术的核心部分,其性能决定了SPME的性能和应用范围,因此发展新型涂层一直是SPME研究和应用工作的重点。近年来随着涂层材料制备技术的发展,出现了一些新型涂层。这些新型涂层的出现进一步拓宽了SPME技术的应用范围。本文综述了近三年来SPME涂层的研究进展,并着重介绍新型涂层的制备方法和性质。As a kind of sampling preparation method,solid phase microextraction (SPME) has many advantages such as simplicity,versatility,sensitivity and solvent free.It has gained widespread acceptance in separation and analysis.As the key factor of the SPME technique,coatings on SPME fiber determine the performance and application of SPME technique.Consequently,developing new coatings is the most important work for SPME.With the development of preparation methods of SPME coatings,many new coatings have appeared in recent years,and these new coatings expand the application fields of SPME technique.This review summaries the development of new SPME coatings in the past three years,and mainly focuses on the preparation methods and properties of new SPME coatings.福建省科技重点项目(No.2007Y0032)资

激光冲击强化对NiTi形状记忆合金热力学性质及微结构的影响

采用多物理场短瞬时同步测量的LSP实验平台,研究了LSP作用后Nri形状记忆合金的马氏体相变行为、表面硬度、LSP影响层深度以及微结构的变化。NiTi合金的马氏体相变行为通过差示扫描热分析仪DSC进行研究,结果发现Nri合金的相变温度没有发生明显的变化,表明LSP后NiTi合金能够保留其优异的形状记忆效应和超弹性性能。LSP后NiTi合金表面硬度则通过显微硬度计进行测量,结果发现LSP后表面硬度得到提高,且随着激光功率密度的增加,表面硬度提高的幅值增大,当到达某