Research and Fabrication of Opto-mechanical Systems of New UV Spectrophotometer

光谱分析检测技术和光谱仪器经历了近百年的发展，在现代科学实验、生物研究、医学及医药研究、工农业生产、国防、天文观测等领域得到了极其广泛的应用。随着现代科学技术的飞速发展，作为光谱仪中的一种，传统的紫外分光光度计采用光电倍增管作为光电接收器件，并配以波长扫描机构实现波长扫描，该类仪器结构复杂、体积大、光谱扫描时间长，己经不能满足当前发展的需要。许多研究、应用领域对分光光度计提出了微小型化、快速化、使用方便灵活、性能价格比高等更高要求。 本论文研制了一款一次性全光谱测量的新型紫外分光光度计。与传统的紫外可见分光光度计相比，本研制的新型的紫外可见分光光度计具有以下独特的优点： 1)采用CCD为光...Spectrum analysis-detecton and spectrometer has been widely used in many fields, such as modern scientific experiments, biological research, medicine and pharmacy, industrial and agriculture production, national defense and astronomical observation. With the development of the modern techniques, as one of spectrometer, in the traditional UV spectrophotometers PMTs are used as the receiver, and a ...学位：工学硕士院系专业：物理与机电工程学院物理学系_精密仪器及机械学号：1992006115185

Study on spare part controlling system in D company

随着IT产品的同质化,售后服务在IT企业之间的竞争中的地位越来越显得重要,售后服务备件的库存在很大程度上决定了服务成本和总成本，又制约了服务的响应速度和服务承诺的兑现，是IT企业经营管理中十分重要的内容。 备件库存控制是基于企业战略之上，在给定服务目标的条件下，确定所需的最低服务总成本。企业追求的是在给定客户服务水平下使服务总成本最小化。而服务备件成本占服务总成本中较大的比率，它包括存货成本、订货成本、缺货成本、购买成本。 本文内容主要分为五章.第一章综述阐述了本文的研究背景及意义，第二章介绍了服务备件管理的特点及方法，第三章和第四章为本文的中心，第三章介绍了D公司当前备件管理模式所采用的...After-sale service is more important in current market competition, The spare part for service is a key factor of after-sale service’ quality , The spare part inventory influence service cost, service response rate and customer’s satisfaction. What the company pursue is to reduce the cost under certain service goal, Spare part inventory cost take great proportion of total service cost. ...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：20041511

Status of Mud Crabs(Scylla spp.) Farming and Studies on the Population Biology of S. paramamosain

综述了国内外青蟹养殖的基本情况,包括养殖模式、养殖历史、人工育苗的现状,我国青蟹养殖在海水养殖中的地位及其特点,以及我国拟穴青蟹种群生物学研究现状及其在养殖中的重要性.This paper summarized the internationally general situation of mud crabs( Scylla spp.) farming,including cultivation pattern,cultural history,the situation of artificial mass larvae culturing,study progresses of population biology of S. paramamosain and its significance in its farming in China,as well as the status and characteristics of China mud crab farming.国家自然科学基金(31472294

连续硬膜外阻滞对婴幼儿血流动力学的影响

摘　要　探讨硬膜外阻滞麻醉对婴幼儿循环功能的影响: 前瞻性选择2岁以下小儿施行连续硬膜外阻滞麻 醉,定时测定阻滞前后收缩压、舒张压、平均动脉压、心率、每搏输出量、分钟心输出量、射血速率指数、心室射血 时间、肺液指数等9项指标及阻滞平面,其中阻滞平面达胸4 ( T4)和胸6 ( T6 )各10例;结果表明阻滞平面达T4和T6 两组患儿硬膜外阻滞后,除心率减慢之外,其他指标无明显改变, 提示连续硬膜外阻滞麻醉对婴幼儿血流动力 学无明显影响

Studies on the Interactions between Bioactive Peroxovanadium Complexes Bearing Organic Ligands and Histidine

在合成和表征了 4种具有较强生物活性双过氧钒配合物K3 [VO(O2 ) 2 (ox) ]·2H2 O ,Na[VO(O2 ) 2 (bipy) ]·5H2 O ,K[VO(O2 ) 2 (phen) ]·3H2 O和K2 [VO(O2 ) 2 (pic) ]·2H2 O [分别缩写为pV(ox) ,pV(bipy) ,pV(phen)和pV(pic) ,其中ox为草酸根 ,bipy为 2 ,2′ 联吡啶 ,phen为邻菲咯啉 ,pic为 2 羧酸吡啶负离子 ]的基础上 ,利用多种NMR技术和电喷雾质谱 (ESI MS)研究了这 4种含有机配体双过氧钒配合物与组氨酸 (His)在溶液中的相互作用以及反应物浓度、时间、pH等对相互作用体系的影响 .51VNMR跟踪监测的结果表明 :双过氧钒配合物pV(ox)和pV(pic)与His在中性水溶液中存在强配位相互作用 ,而pV(bipy)和pV(phen)与His在中性水溶液中无明显作用 .我们还利用谱学方法确定了pV(ox)和His相互作用后所生成产物是pV(ox)分别与His咪唑基上的 3 N和 1 N配位的一对异构体. 　In order to explore the structure2activity relationship and molecular mechanism of the specific recognition between peroxovanadium (pV) complexes bearing organic ligands and the target enzymes of tyrosine phosphatase , several NMR techniques and ESI2MS were used to study the interactions of four pV complexes {pV(ox) , pV ( bipy) , pV (phen) and pV (pic) , where pV = [VO (O2 ) 2L ] n - , in which L = oxalic acid dianion (ox) , bipyridine (bipy) , 1 ,102phenanthroline (phen) , and pyridine222carboxylic acid (pic) } towards histidine. Strong coordination interactions between imidazole of histidine and vanadium of pV(ox) or pV(pic) were observed in neutral solution , while there are not obvious interactions between histidine and pV(bipy) or pV(phen) . All 13C and 1H NMR signals of 1∶1 stoichiometric mixture of pV(ox) and histidine were assigned. Spectroscopic studies demonstrated that new complexes in the mixture of pV(ox) and histidine are a pair of isomers in which the vanadium in pV(ox) binding to the 32N and 12N of the imidazole ring. Moreover , the results of effective factors on the interaction system indicated that the new isomers were stable under the condition of physiological pH and the structure2activity relationship of these pV complexes may be relevant to their specific recognition towards histidine residues in tyrosine phosphatase.国家自然科学基金 (Nos.2 0 172 0 42 ,2 9832 0 2 0 )资助项

磁共振成像中背景不均匀场去除方法研究

磁敏感加权成像(susceptibility weighted imaging,SWI)是近年来新开发的磁共振成像技术,最早由E.Mack Haacke等于1997发明[1],并最初被称作"高分辨率血氧水平依赖静脉成像"(high resolution blood oxygenation level dependent venographic imaging)。中央高校基本科研业务费专项资金(2010121101);国家自然科学基金(81171331

硅藻对不同生态习性桡足类抗氧化相关基因表达的影响

采用实时荧光定量PCR(qRT-PCR)技术比较3种不同生态习性的桡足类摄食不同浓度的2种硅藻牟氏角毛藻(Chaetoceros muelleri)和小新月菱形藻(Nitzschia closteriumf.minutissima)后,其2种抗氧化相关基因锰超氧化物歧化酶(MnSOD)和谷胱甘肽转移酶(GST)表达水平的变化情况.所用桡足类分别为哲水蚤类的太平洋纺锤水蚤(Acartia pacifica)、安氏伪镖水蚤(Pseudodiaptomus annandalei)和猛水蚤类的日本虎斑猛水蚤(Tigriopus japonicas).结果显示:低浓度的硅藻对太平洋纺锤水蚤和安氏伪镖水蚤中MnSOD和GST基因的表达水平表现出显著的诱导效应,高浓度的硅藻则表现出抑制效应;而不论是低浓度还是高浓度的硅藻均能诱导日本虎斑猛水蚤中MnSOD和GST基因的表达.这表明不同类别的桡足类对硅藻的分子响应存在物种特异性.为评估哲水蚤桡足类对硅藻的影响是否具有适应能力,进而将哲水蚤类的安氏伪镖水蚤在摄食上述2种硅藻条件下连续培养4个世代,并对其每个世代中MnSOD基因的表达水平进行分析.结果显示:牟氏角毛藻饲喂的安氏伪镖水蚤中,第4个世代的MnSOD基因表达水平显著高于第1个世代;而小新月菱形藻饲喂的安氏伪镖水蚤中,后3个世代的MnSOD基因表达水平均显著高于第1个世代.由此推测安氏伪镖水蚤可以对2种硅藻产生遗传适应,并且适应机制可能不同.国家自然科学基金(41276132

Application of Vector Frequency Converters in Tea Baking Time Control

[中文文摘]茶叶的烘焙时间控制存在的问题主要是:茶叶的含水量与烘焙时间没有建立准确的控制模型;各烘焙箱之间的连动不能统一控制;茶叶品种与烘焙时间关系没有进行记录,造成产品质量的重复性差。对传动控制系统进行技术改造;采用矢量变频器对烘焙箱传送带电动机实现无速度传感器控制;采用基于RS485总线的网络对变频器进行控制;建立烘焙箱之间的连动控制模型;建立烘焙时间与变频器给定频率之间的数学模型;工控机把控制参数自动存入数据库并完成报表打印、变频器参数设置和存储。现场应用表明该技术改造有效可行。[英文文摘]Main problems for tea baking time control are that the control model between the moisture content of tea and the baking time was not built; baking boxes were not centralized automatically controlled; the baking time had no tracking record. It is improved upon the gearing: controlled transport electromotors based on vector control frequency converters(VCFC), controlled centralized automatically VCFC based on the RS485 bus, built a control model for baking boxes, built a mathematical model between the bakingtime and the frequency of VCFC The computer saved control parameters to the database and printed reports The results show that the improvement is effective and feasible.福建省产学研究项目(0041-K81035