Design and Implementation of Canteen Management Information System for a Vocational College

摘要 随着信息技术的高速发展，各类信息化技术也迅速普及推广到各行各业，成为经济和社会发展的助推剂。食堂管理信息系统作为保证食堂信息管理的重要内容，其信息化建设程度能进一步加强食堂的资源整合，提升高校食堂管理的质量。当前食堂信息管理针对的各类服务事宜具有餐点安全、采购高效、食品色香味俱全、财务统计清晰流畅等需求，由于高校现已经普及了校园一卡通消费和服务，且如二维码点餐等先进的技术应用逐渐普及，因而其资金结算方面流程更加多样、操作更加复杂。鉴于当前通信技术和计算机技术的快速发展，通过为某职业学院实现一种极具安全性、实用性的食堂管理信息系统具有十分重要的意义。 本文针对某职业学院食堂管理信息系统...Abstract With the rapid development of information technology, all kinds of information technology are also quickly spread to all walks of life and become the propellant of economic and social development. Canteen information management system is as the important content of information management, its informationization level can further strengthens resource integration of canteen and improve the...学位：工程硕士院系专业：软件学院_工程硕士(软件工程)学号：X201323191

FABRICATION OF HYDROXYAPATITE/ALUMINUM OXIDE COMPOSITE COATINGS BY THE COMBINATION OF ELECTROPHORETIC DEPOSITION AND REACTION BONDING PROCESS

在金属表面用电泳沉积(electrophoretic deposition,EPD)法制备羟基磷灰石(hydroxyapatite,HA)涂层的主要问题是结合强度较低。为了提高HA涂层与基体的结合强度,先采用EPD在钛表面制得羟基磷灰石/铝(hydroxyapatite/aluminum,HA/Al)复合涂层,然后采用反应结合方法(reaction bonding process)制备羟基磷灰石/氧化铝(hydroxyapatite/aluminum oxide,HA/Al2O3)复合涂层,并与相同条件下制备的HA单一涂层进行比较研究。用扫描电镜表征涂层的表面和横截面形貌。用能量散射X射线衍射(X-ray diffraction,XRD)谱分析HA/Al2O3复合涂层的化学组成。用XRD仪研究涂层的物相组成和热稳定性。通过黏结–拉伸实验测定HA涂层与基体的结合强度。结果表明:通过850℃热处理,HA/Al复合涂层中的Al粉发生氧化反应生成Al2O3,经反应结合得到HA/Al2O3复合涂层;反应结合提高了HA涂层的致密化程度且降低了基底钛表面的氧化程度;与单一HA涂层相比,HA/Al2O3复合涂层与基底间的结合强度得到明显提高。The major problem in fabricating hydroxyapatite (HA) coating on metal substrate by electrophoretic deposition is the low bonding strength between the coating and substrate. In order to improve the bonding strength,hydroxyapatite/aluminum oxide (HA/Al2O3) composite coating was fabricated on titanium substrate using the combination of electrophoretic deposition and reaction bonding process. The HA single coating was prepared in the same conditions for comparison. Scanning electronic microscope was employed to characterize the surface and cross-sectional morphologies of the as-prepared coatings. The chemical compositions of the composite coating were analyzed through energy dispersive X-ray spectroscopy. X-ray diffraction was used to study the phase com-position and thermal stability of the as-prepared coatings. The bonding strength between the coating and substrate was tested by a shear strength testing experiment. The results show that the Al in HA/Al green coating prepared by the EPD was oxidized to Al2O3,and HA/Al2O3 composite coating was obtained using the reaction bonding process by heat treatment at 850 ℃. The reaction bonding process promotes the coating's sintering densification and improves the substrate's oxidation resistance during the heat treatment. In comparison with the HA single coating,the HA/Al2O3 composite coating exhibits much higher bonding strength.国家自然科学基金(20573086);; 国家科技支撑计划(2007BAE05B04);; 厦门市科技计划(3502Z20063005)资助项

EFFECTS OF SUSPENSION POWDER CONTENT ON THE ELECTROPHORETIC DEPOSITION OF HYDROXYAPATITE COATINGS

从不同羟基磷灰石(hydroxyapatite,HA)粉体含量的悬浮液中,在钛表面电泳沉积HA涂层。采用扫描电镜、X射线衍射表征涂层的微观形貌及物相组成,通过黏结-拉伸实验测定涂层与基底的结合强度。结果表明:提高悬浮液的HA粉体含量,有助于提高电泳沉积HA涂层的致密性,改善其烧结性能,提高烧结致密化程度;HA涂层致密性的提高,有效地抑制了钛基底表面氧化反应,改善了涂层与基底的界面结合状态,使HA涂层与钛基底的结合强度从悬浮液HA粉体含量为5 g/L时的4.54 MPa,提高到悬浮液HA粉体含量为20 g/L时的19.92 MPa。Hydroxyapatite(HA) coatings were deposited on titanium substrate by electrophoretic deposition in suspensions with dif-ferent HA powder contents.The surface and cross-sectional morphologies and phase composition of the as-prepared coatings were characterized by scanning electronic microscopy and X-ray diffraction.The bonding strength between the coating and substrate was tested by a shear strength testing experiment.The results show that suspension HA powder content has a significant effect on the mi-crostructure of the deposited coating,and further on its sintering property and the bonding strength between the coating and substrate.The increase in suspension HA powder content is beneficial in producing dense green coating,improving the sintering process of coating and the oxidation resistance of the substrate,and consequently increasing the bonding strength.The bonding strength between the HA coating and titanium substrate can be increased from 4.54 MPa with a suspension HA powder content of 5 g/L to 19.92 MPa with a suspension HA powder content of 20 g/L.国家自然科学基金(20573086);; 国家科技支撑计划(2007BAE051304);; 厦门市科技计划(3502Z20063005)资助项

Research and fabrication of silicon based metal-semiconductor-metal photodetector with U-shape trench interdigitated electrodes

为了提高硅MSM结构光电探测器的光电响应度,制备了U型凹槽电极结构的探测器。5 V偏压下,对650 nm波长入射光的绝对光电响应度测试表明,凹槽电极结构的探测器最大光电响应度值为0.486 A/W,比同样尺寸的平版结构光电探测器提高了约6倍。文中也对比了具有抗反射膜和不具有抗反射膜的器件相对响应光谱的差别,并且比较分析了叉指间隙分别为5μm和10μm器件光电响应的不同。The responsivity of silicon based metal-semiconductor-metal(MSM) photodetector(Si-MSM-PD) was improved by placing the planar interdigitated electrodes with U-shape trench interdigitated electrodes.The performance test indicates that the responsivity of Si-MSM-PD with U-shape trench interdigitated electrodes is 0.486 A/W for 650 nm laser at 5 V applied voltage.This responsivity is about 6 times larger than that of Si-MSM-PD with planar interdigitated electrodes whose responsivity is just 0.084 A/W.Besides,the performance of Si-MSM-PDs with different intergitated space of 5 μm and 10 μm was compared.国家自然科学基金资助项目(60576001,60336010,60676027);; 福建省自然科学基金资助项目(A0410008

Preparation of Co-YSZ/HAp Nano-composite Coating on Ti Substrate by Electrochemical Method

采用复合电沉积和电泳沉积两步法在钛基体上制备了Co-YSZ/HAp纳米复合涂层,与只采用电泳沉积法在钛基体上制备纳米HAp单一涂层进行了比较研究.采用场发射扫描电镜、X射线衍射和能量散射谱对复合涂层的微观形貌,纳米HAp外层表面形貌,晶相,复合涂层的断面形貌及元素组成分布进行分析研究.通过粘结-拉伸实验测定了涂层与基体的结合强度,结果表明,Co-YSZ/HAp纳米复合涂层与钛基体的结合强度明显高于纳米HAp单一涂层与钛基体的结合强度,说明复合涂层具有更好的力学性能.Co-YSZ/HAp nano-composite coating and nano-HAp single coating were deposited on Ti substrate using the combination of electrocodeposition and electrophoretic deposition, and electrophoretic depositions, respectively. Surface and cross section morphologies of the coatings were observed by scanning electron microscope. Element distribution and crystal phase of the coatings were analyzed by energy dispersive spectrum and X-ray diffraction. The adhesive strength of the coating and Ti substrate was determined by shear strength testing. The results indicate that the adhesive strength of Co-YSZ/HAp nano-composite coating and Ti substrate is higher than that of nano-HAp single coating and Ti substrate. It shows that Co-YSZ as an interlayer reduces the mismatch of the thermal expansion coefficients between HAp and titanium and Co-YSZ/HAp nano-composite coating has better mechanical properties.国家自然科学基金(20573086,200273055);; 福建省自然科学基金(E0210004)资助项

Preparation of Co-YSZ/HAp nano-composite coating on Ti substrate by electrochemical method

Co-YSZ/HAp nano-composite coating and nano-HAp single coating were deposited on Ti substrate using the combination of electrocodeposition and electrophoretic deposition, and electrophoretic depositions, respectively. Surface and cross section morphologies of the coatings were observed by scanning electron microscope. Element distribution and crystal phase of the coatings were analyzed by energy dispersive spectrum and X-ray diffraction. The adhesive strength of the coating and Ti substrate was determined by shear strength testing. The results indicate that the adhesive strength of Co-YSZ/HAp nano-composite coating and Ti substrate is higher than that of nano-HAp single coating and Ti substrate. It shows that Co-YSZ as an interlayer reduces the mismatch of the thermal expansion coefficients between HAp and titanium and Co-YSZ/HAp nano-composite coating has better mechanical properties

The Influence of Suspension Properties on Electrophoretic Deposition of Hydroxyapatite Coatings

涂层裂纹控制和沉积速率的研究是设计和优化电泳沉积涂层的基础.悬浮液特性是影响电泳沉积涂层的关键因素之一.通过对不同PH条件下悬浮液的粒径、zETA电位、电导率和稳定性等参数的测定,探讨悬浮液特性参数对电泳沉积羟基磷灰石涂层过程中涂层裂纹控制和沉积速率的影响.结果表明:沉积速率随悬浮液PH的增加先增加后减小,并在PH 2.9附近获得最大值.此外,沉积速率还受陈化时间的影响.悬浮液PH对涂层裂纹控制有重要影响,在PH 2.9附近电泳沉积获得的涂层的裂纹最少.悬浮液在PH 2.9附近(电导率为11--12μS/CM)且陈化1--2 d是电泳沉积针状羟基磷灰石涂层的适宜条件.It is essential to study the crack controlling and deposition rate for the design and optimization of the coatings fabricated by the electrophoretic deposition(EPD) process.The property of the suspension is a key factor in the electrophoretic deposition of coatings.The parameters related to the property of the suspension such as particle size,zeta potential of the particle,conductivity and stability were characterized and then their effects on both the crack controlling and deposition rate in the electrophoretic deposition process of hydroxyapatite(HA) coatings were discussed.Results showed that the deposition rate increases at the first stage as the pH of the suspension increased and then decreased,gaining a maximum at the pH value of about 2.9.In addition,the aging time plays an important role in the deposition rate.Again,the pH of the suspension showed a significant influence on the crack controlling of HA coatings and cracks were minimized in the coating deposited from the suspension with a pH value of about 2.9.The suspension at pH 2.9 approximately with a conductivity of 11 μs/cm to 12 μs/cm and aging for 1 d to 2 d is appropriate for the electrophoretic deposition of needle-like HA coatings.国家自然科学基金(20573086