A MEMS Temperature Sensor of Pt Film

本文针对基于Pt功能薄膜的MEMS温度传感器，对功能材料的制备、传感器的制作、传感器的分析与有限元仿真、虚拟仪器测试平台的建立以及测试系统误差的分析等问题进行研究，其主要内容如下： 首先，阐明了磁控溅射Pt功能薄膜的工作原理，提出并分析影响薄膜性能的各种因素，如溅射功率、真空度、氩气流量和热处理温度等。以Si-SiO2作为沉积薄膜的基底，采用正交实验方法对各磁控溅射工艺参数的组合进行优化设计，并以电阻温度系数（TCR）作为评价薄膜性能的重要指标，最终确定最优的工艺参数组合。基于上述Pt功能膜，进行了该MEMS温度传感器的工艺流程设计。通过版图设计软件获得所需掩膜版，并深入分析与调整光刻与剥离...This paper investigates the preparation of thermosensitive material of platinum（Pt）film, the MEMS fabrication of the sensor, the finite element analysis and simulation for performance evaluation and the establishment of the virtual instrument testing platform for the MEMS temperature sensor of Pt functional film. And we achieve these research progresses: First,the working principal of sputterin...学位：工学硕士院系专业：物理与机电工程学院机电工程系_测试计量技术及仪器学号：1992007115115

A Study on Financial Risk Evaluation for Real Estate Corporation

近年来，我国房地产业的发展突飞猛进。房地产政策的改进，以及金融政策的创新，不断地为房地产企业创造越来越广阔的发展空间。然而，由于房地产属于高投资、高风险、高收益的行业，加上我国的房地产业尚不够规范化，金融体系的不完善，房地产业在高歌猛进的同时，也承受着巨大的财务风险。据有关统计，相当多的房地产企业的资产负债率都在70%以上，有些甚至超过了90%。随着国家对房地产业的宏观调控的加强，企业将面临越来越复杂的环境和日益严峻的挑战，如何识别、评价、防范企业的财务风险成为亟待解决的问题。 本文回顾了国内外对财务风险的相关研究，在分析了房地产企业财务风险的特征及其成因后，指出进行房地产企业的财务风险评价...In recent years, real estate industry in China has developed by leaps and bounds. To improve the real estate policy, as well as the financial policies of innovation, continuously for the real estate business to create more and more broad space for development. However, because the Real Estate Industry is characterized by huge investment, high risks, high returns, coupled with China's real estate i...学位：工商管理硕士院系专业：管理学院工商管理教育中心（MBA中心）_工商管理硕士(MBA)学号：1792006115151

1976 Vol. 24 Number 11

https://engagedscholarship.csuohio.edu/lawpublications_gavel1970s/1100/thumbnail.jp

Calculation of Ultimate Shear Strength of High Strength Concrete Column Reinforced with Concrete Filled Steel Tube

介绍了以圆钢管为钢骨的劲性高强混凝土柱的剪切性能试验的试验概况,在此基础上研究了它的斜截面承载力计算方法。在计算时,采用了将构件分成几个独立的抗力机构,相互叠加构成构件抗力体系的计算方法的计算模型。进而利用剪切性能试验得到的数据结果进行参数回归,得到以圆钢管为钢骨的劲性高强混凝土柱的斜截面承载力计算公式。General situation about shear experiments of high concrete columns reinforced with concrete filled steel tube is presented,and method for calculating ultimate shear strength of the columns is discussed based on the experimental results.Shearing resistant mechanism of the columns can be made up of several simple individual shearing resistant mechanisms,and then the formula for calculating ultimate shear strength can be established by superposing the actions of these shearing resistant mecnanisms.In the further analysis,the unknown parameter in the formula is regressed using the test data of shear experiments

皂术茵陈方治疗非酒精性脂肪性肝炎的临床观察及其对肠道菌群的影响

目的评价皂术茵陈方调节肠道菌群治疗非酒精性脂肪性肝炎(NASH)的临床疗效及其作用机制。方法选取福建中医药大学附属厦门市中医院肝病中心门诊就诊的NASH患者80例,采用随机数字表法分为治疗组(40例)和对照组(40例)。治疗组予中药皂术茵陈方治疗,对照组予以枯草杆菌二联活菌肠溶胶囊治疗,两组疗程均为12周。评价治疗前后两组患者的症状、体征积分以及血清ALT、AST活性;检测两组患者血清内毒素水平以及肠道菌群变化。结果治疗12周后,治疗组的临床总有效率达87.5%(35/40),较之对照组的65%(26/40)有统计学意义(χ~2=7.966,P<0.05);两组患者ALT、AST活性以及血清内毒素水平较治疗前均有明显下降(P<0.05),且以治疗组的ALT、AST活性下降值大于对照组(t=2.254,t=2.325,P<0.05);两组患者肠道菌群中的双歧杆菌、乳酸杆菌、拟杆菌数量较治疗前显著升高,而肠球菌、肠杆菌显著降低(P<0.05)。结论皂术茵陈方具有改善肝功能、治疗NASH的临床疗效,其作用机制与调节肠道菌群紊乱、恢复肠道微生态平衡、减轻肠源性内毒素血症相关。国家自然青年科学基金资助项目(No.81503529);;福建中医药大学临床专项校管课题基金(No.XB2016080

Determination of Chlorpromazine and Promethazine and Their Metabolites in Animal Food Using Ultra Performance Liquid Chromatography with Tandem Mass Spectrometry

建立了动物源食品中吩噻嗪类药物氯丙嗪、异丙嗪及其代谢物氯丙嗪亚砜和异丙嗪亚砜同时测定的固相萃取超高效液相色谱-电喷雾电离串联四极杆质谱(uPlC-ESIMS/MS)方法。样品用乙酸乙酯和氢氧化钠溶液提取,OASIS Hlb柱富集净化,超高效液相色谱-电喷雾串联四极杆质谱仪检测,采用多反应监测正离子模式,可以一次性对动物源性食品中的吩噻嗪类药物氯丙嗪、异丙嗪及其代谢物氯丙嗪亚砜和异丙嗪亚砜进行定性和定量测定。方法在1--100μg/l范围具有良好的线性,回收率为76%--96%,定量下限(S/n>10)为异丙嗪5μg/kg,氯丙嗪、氯丙嗪亚砜、异丙嗪亚砜1μg/kg。检出限(S/n=3)为异丙嗪1.5μg/kg,氯丙嗪、氯丙嗪亚砜、异丙嗪亚砜0.3μg/kg。A method for the simultaneous detection residues of chlorpromazine and promethazine and their metabolites chlorpromazine sulphoxide and promethazine sulphoxide in animal foods was developed by using solid phase extraction(SPE) combination with ultra performance liquid chromatography-electrospray ionization triple-quadruple tandem mass spectrometry(UPLC-ESI MS/MS).The chlorpromazine and promethazine and their metabolites in the test sample was extracted with ethyl acetate and sodium hydroxide solution.The homogenate was centrifuged and the supernatant was collected.The extract was cleaned up and concentrated on an Oasis HLB cartridge,and then analyzed by UPLC-ESI MS/MS under the positive ion mode using multiple reaction monitoring(MRM) mode.Extraction and chromatographic conditions were optimized and the best separation was obtained.The cabalibration curves were linear in the range of 1-100 μg/L.The average recoveries were between 76% and 96%(n=6) in the spiked range of 5-100 μg/kg in pork,fish,dullfrog and milk.The limits of quantification(S/N>10) were in the range of 1-5 μg/kg and the limits of detection(S/N=3) were 0.3-1.5 μg/kg.国家质量监督检验检疫总局科研计划资助项目(2007IK137

NUMERICAL ANALYSIS OF LOAD-MOMENT INTERACTION DIAGRAM FOR HIGH STRENGTH CONCRETE COLUMN REINFORCED WITH CONCRETE FILLED STEEL TUBE

介绍了以圆钢管为钢骨的劲性高强混凝土柱的抗震性能研究的试验概况,在此基础上采用条带有限元法进行了弯矩-轴力相关曲线的数值分析,计算结果与试验结果大致吻合,可以用于确定该类柱在偏压状态下的极限承载力。The general situation of earthquake-resistant behavior experiments of high concrete columns reinforced with concrete filled steel tube is presented.Based on the experimental results,the numerical analysis of load-moment interaction diagram for the columns is completed using strip finite element analysis method.The calculation results are in basic agreement with those of the experimental values,so the numerical analysis method can be used to determine the ultimate bearing capacity of the columns under eccentric compression

Ultimate Strength of High Strength Concrete Columns Reinforced with Concrete Filled Steel Tube Under Axial Compression and their Reliability Analysis

为了探求一个合理的设计公式来计算带圆钢管的劲性高强混凝土柱在轴压下的极限强度,完成了包含13个短柱试件在内的轴心受压试验以研究该类柱在轴压下的破坏模式和极限强度.试验结果表明,在荷载作用下,直到荷载接近极限值时,柱中钢管、纵向钢筋以及混凝土三者之间的纵向应变基本上是协调的,计算结果与试验结果吻合良好,因此可以采用叠加原理来计算带圆钢管的劲性高强混凝土柱在轴压下的极限承载力.此外,分析了该极限承载力计算公式的可靠度水平.分析结果表明,该承载力计算满足GB50068-2001对构件可靠指标的要求.This paper aims at developing a rational design formula to predict the ultimate strength of high strength concrete columns reinforced with concrete filled steel tube (HSCCRST) under axial compression. In order to investigate the failure mode and the ultimate strength of the columns under axial compression, experimental tests of 13 specimens under axial compression were performed. Test results showed that the longitudinal strain of the steel tube, the longitudinal reinforcement, and the concrete in the column were all compatible under loading until the load applied was close to the ultimate load. Therefore, the ultimate strength of HSCCRST could be calculated in the principle of superposition. In addition, the reliability level of the columns under axial compression designed following the proposed formula was investigated. Analysis results indicated that the reliability indexes of the columns designed following the proposed formula satisfied the demand of Unified Standard for Reliability Design of Building Structures (GB 50068-2001), National Standard of the People's Republic of China.国家自然科学基金资助项目(50378034

Experimental Study on Tip-Induced Electrospinning

针尖诱导电纺技术(TIE)利用针尖阵列插入聚合物溶液表面后快速抽离,由于高压强电场和黏性力作用在液面抽离处诱导形成泰勒锥,进而在收集板上得到大量纳米纤维,实现纳米纤维的批量制造.实验结果表明在不同电极间距下,电纺阈值电压随着溶液浓度的增加而增大.当工作电压为63 kV,溶液槽尺寸为142 MMx50 MM时,电纺聚氧化乙烯(PEO)溶液的纤维产量达1.961 2 g/H.当工作电压从45 kV增加到63 kV时,纤维沉积均匀性变化范围为31.08%~43.23%.Tip-induced electrospinning(TIE) is demonstrated to produce nanofibers with high throughput.Probe array was plunged into the plane polymer solution and then withdrawn quickly,and due to the effects of viscous force and the electric force,Taylor cones were generated from the position where the probes left,and then mass nanofibers were obtained on the collector.The experimental results show that the threshold voltage under different electrode distances increases with the increase of the concentration,and the mean throughput of polyethylene oxide(PEO) nanofibers is up to 1.961 2 g / h when the solution tank size is 142 mm × 50 mm and the applied voltage is 63 kV.And the maximum deposition error of nanofibers is within the range of 31.08% —43.23% on the condition that the applied voltage changes from 45 kV to 63 kV.国家自然科学基金重点资助项目(51035002); 国家自然科学基金资助项目(51205334); 福建省自然科学基金资助项目(2011J05139

Continuous Tipless Electrospinning with Rotatory Electrode

连续供液的旋转电极式无针尖静电纺丝采用圆柱滚筒电极代替喷丝头实现了高产量纳米纤维制造.该方法避免了喷丝头的堵塞问题,同时也实现了纳米纤维的连续生产.本文利用扫描电镜(SEM)探讨了该制作过程中的关键参数,如溶液浓度、偏置电压、旋转速度以及溶液厚度等对纳米纤维直径的影响.实验结果表明,纳米纤维的平均直径随溶液浓度、圆柱滚筒电极旋转速度和溶液厚度的增大而增大,但随着偏置电压、圆柱滚筒电极直径的增大而减小.圆柱滚筒电极长度为12 CM、直径为60 MM时制备的纳米纤维产量高达8.7 g/H,且纳米纤维的直径均小于500 nM.Tipless electrospinning with rotatory electrode and continuous supply polymer solution,which uses a cylindrical-shape rotatory electrode to replace syringe spinneret,is a novel method for massive production of nanofibers.It not only avoids the blockage of spinneret but also realizes the continuous production of nanofibers.In this paper,the effects of some key parameters such as solution concentration,applied bias voltage,rotatory speed and thickness of solution on the diameter of nanofibers were discussed via scanning electron microscope( SEM).The results demonstrate that the mean diameter of electrospun nanofibers increases with the increase of solution concentration,rotatory speed of cylindrical-shape rotatory electrode and thickness of solution,but decreases with the increase of applied bias voltage and diameter of cylindrical-shape rotatory electrode.The output of nanofibers achieved 8.7 g / h for a cylindricalshape rotatory electrode( 12 cm in length and 60 mm in diameter),and the diameters of nanofibers were less than 500 nm.supportedbyKeyProgramofNationalNaturalScienceFoundationofChina(51035002);theNationalNaturalScienceFoundationofChina(51205334); theNaturalScienceFoundationofFujianProvinceofChina(2011J05139)~