洪泽湖大型底栖动物群落结构及其与环境因子的关系

洪泽湖是我国第四大淡水湖,然而关于洪泽湖大型底栖动物的报道较少。为了研究洪泽湖大型底栖动物群落结构特征及其影响因子,在洪泽湖设置20个采样点,进行了为期1周年的季度调查(2010年5月-2011年2月)。共采集到大型底栖动物14种,寡毛类、摇蚊科幼虫和软体动物分别有5种(占总物种数的35.7%)、3种(21.4%)和6种(42.9%)。河蚬为第一优势种(优势度Y=0.18),其次分别为苏氏尾鳃蚓(0.09)、羽摇蚊(0.07)、霍甫水丝蚓(0.06)和铜锈环棱螺(0.06)。群落的平均密度和平均生物量分别为(45.45±7.38)个/m2和(52.43±12.04)g/m2,其中软体动物平均密度和平均生物量最高[(24.80±6.20)个/m2和(49.55±11.94)g/m2],摇蚊类次之[(13.76±2.87)个/m2和(2.28±0.71)g/m2],寡毛类最低[(6.96±2.41)个/m2和(0.60±0.18)g/m2]。全湖Shannon-Wiener、Margalef和Pielou指数分别为2.69、1.10和0.71,各指数季节差异不明显。冗余分析(RDA)结果共解释物种数据累计方差的35.0%;MonteCarlo检验表明,洪泽湖水体中硝酸盐氮、总氮和化学耗氧量是影响底栖动物群落分布最关键的环境因子(F=2.181～3.277,P<0.05)

Kartoitus tankotanssijoiden urheiluvammoista : kvantitatiivinen kyselytutkimus

Tässä opinnäytetyössä tutkittiin tankotanssijoiden urheiluvammoja kvantitatiivisin menetelmin. Tutkimustulosten perusteella pystytään jakamaan uutta tietoa lajin urheiluvammoista tankotanssin parissa toimiville henkilöille, kuten valmentajille, harrastajille, kilpailijoille ja lajista kiinnostuneille. Tutkimuksessa selvitettiin, kuinka monelle tankotanssijalle on tullut urheiluvammoja. Vammoista selvitettiin sen kohdealue, laatu ja koetun haitan kesto. Lisäksi selvitettiin iän, sukupuolen, kokemusvuosien ja viikoittaisen harjoittelutuntimäärän yhteydet vammautumisiin. Kysely jaettiin keväällä 2018 ympäri Suomea tankotanssikouluihin ja se oli menetelmältään kvantitatiivinen. Vastauksia tuli yhteensä 262 kappaletta. Kerätty aineisto syötettiin ja analysoitiin MS Excel- ja IBM SPSS Statistics -ohjelmistoilla. Tuloksista kävi ilmi, että yleisimmät urheiluvammat tankotanssissa kohdistuvat yläraajaan olkapään alueelle. Vammat koettiin lihasperäisiksi rasitusvammoiksi ja niiden aiheuttama haitta oli useimmiten 1 – 4 viikkoa. Viikkoharjoittelutuntimäärällä oli selkeästi yhteyttä vammojen esiintyvyyteen (p=0,036), mutta sen riippuvuus oli heikko (C=0,032). Kokemusvuosilla oli selkeästi yhteyttä vammojen esiintyvyyteen (p=0,0065). Vastauksista kävi ilmi, ettei ikä ollut tilastollisesti merkitsevä tekijä vammojen esiintyvyydessä (p=0,095).The aim of this bachelor’s thesis was to carry out a research of sports injuries among pole dancers with quantitative methods. The material was collected with a structured electric questionnaire. The purpose was to innovate new knowledge about sports injuries among pole dancers. The information can be used by coaches, amateurs, professionals, and others who are interested in the sport. This study’s objective was to clarify how many pole dancers has had a sports injury. The other examined matters were the target areas of sports injuries, their quality, and how long was the duration of one’s experienced drawback after injury. Furthermore, the researchers were interested in the possible connection of age, gender, years of experience, and weekly practice hours to sports injuries incidence. The questionnaire was shared to Finnish pole dancing schools in spring 2018 and a total of 262 replies were received. The survey was quantitative, and the gathered material was analyzed with MS Excel, and IBM SPSS Statistics software. According to the results, it appears that the most general sports injuries in pole dancing are directed to the upper limb, more precisely to the shoulder area. The injuries were experienced as mostly repetitive strain injuries. The usual experienced drawback period was 1 to 4 weeks. There was a clear connection with weekly practice hours and the incidence of injuries (p=0,036), but they only had a weak dependence (C=0,032). The years of experience had a clear connection to the incidence of injuries (p=0,0065). Age was not a statistical significant factor in incidence of sports injuries (p=0,095)

干扰素防治草鱼出血病的效果初探

对人工诱导的鲫鱼干扰素防治草鱼出血病的效果进行了初步探讨。结果表明 ,人工诱导的鲫鱼干扰素确能有效防治草鱼出血病 ,腹腔注射和药浴浸泡两种途径均有一定效果。在病毒感染前使用干扰素处理的效果好于在病毒感染后使用干扰素处理。多次使用干扰素处理的效果好于一次性处

Therapeutic effect of a new warm moist air device assisted with eyelid massage on office dry eye

目的：比较眼睑加热联合眼睑按摩与人工泪液对办公室干眼的疗效。方法：本研究纳入办公室工作人员干眼患者60例60眼,并随机分为2组。对照组给予人工泪液治疗,试验组给予蒸汽润眼仪联合眼睑按摩治疗。所有受检者均在治疗前、治疗后2、4wk按照以下顺序进行检查：眼表疾病指数问卷表、泪膜破裂时间、角膜荧光素染色、Schirmer Ⅰ试验与睑板腺分泌功能评估。结果：入选60例60眼干眼患者中,48例48眼患者（对照组23例23眼,试验组25例25眼）患有睑板腺功能障碍。4wk的治疗过程中,眼表疾病指数评分（F分组=41.63,P〈0.01）、泪膜破裂时间（F分组=60.47,P〈0.01）与睑板腺分泌物性质评分（F分组=12.12,P〈0.01）,实验组疗效均优于对照组。角膜荧光素染色（F分组=1.79,P〉0.05）、泪液分泌量（F分组=0.17,P〉0.05）与睑板腺管通畅率评分（F分组=0.68,P〉0.05）,两组间差异无统计学意义。结论：睑板腺功能障碍是我国办公室干眼的重要病因,眼睑加热联合眼睑按摩对办公室工作人员干眼疗效优于人工泪液。AIM: To investigate the therapeutic effect of a new warm moist air device assisted with eyelid massage in the treatment of office dry eye (ODE). METHODS: Sixty ODE patients were recruited, and these patients were randomly divided into two groups. One group received artificial tear treatment, and the other group received a new eyelid warm moist air device combined with eyelid massage treatment. Subjects completed the ocular surface disease index (OSDI), which was followed by fluorescein tear breakup time (BUT), corneal fluorescein staining (CFS), Schirmer I test (SIt) and meibomian gland secretion function evaluation at baseline, and 2 and 4wk after treatment. RESULTS: In these 60 patients, 48 patients (23 in artificial tear treated group and 25 in the new warm moist air device assisted with eyelid massage treated group) were positive for meibomian gland dysfunction (MGD). Compared to artificial tear treatment, the new warm moist air device assisted with eyelid massage treatment showed favorable therapeutic effect on OSDI (FGroup=41.63, P&lt;0.01), BUT (FGroup=60.47, P&lt;0.01) and the grade of meibum quality (FGroup=12.12, P&lt;0.01) during 4wk treatment in this study. No significant difference was found in SIT (FGroup=0.17, P&gt;0.05), CFS (FGroup=1.79, P&gt;0.05) and meibomian gland expressibility (FGroup=0.68, P&gt;0.05) between the two groups during 4wk treatment. CONCLUSION: This new eyelid warm moist air device assisted with eyelid massage has favorable therapeutic effect over artificial tear in ODE treatment. Copyright 2017 by the IJO Press.国家自然科学基金青年科学基金项目（No.81500693

Comparison of fertilizer-effect models on winter wheat response to nitrogen and phosphorus fertilizers in saline soils in the Yellow River Delta

通过大田试验, 研究了黄河三角洲盐碱土地区冬小麦合适的肥料效应模型。在冬小麦生长季设置4种不同的氮磷肥用量, 根据&ldquo;3414&rdquo;试验设计8 种不同的肥效试验处理, 以探讨线性加平台、一元二次、平方根和二元二次4 种不同模型的拟合效果。结果显示, 4 种肥料效应模型的拟合结果经检验都达到极显著水平 (P&lt;0.01)。在一元肥料效应模型中, 氮磷一元二次模型拟合效果最好, 最高收益分别为7 448.3 元&middot;hm-2 和7 357.7 元&middot;hm-2, 最佳经济氮磷用量分别为254.4 kg&middot;hm-2 和98.6 kg&middot;hm-2。对比一元与二元模型, 后者拟合效果较好, 最佳经济氮磷用量分别为244.1 kg&middot;hm-2 和94.2 kg&middot;hm-2, 即氮磷肥配比为2.6∶1, 经济效益为7 432.4 元&middot;hm-2, 氮肥农学利用率为6.2 kg(籽粒)&middot;kg-1(N), 磷肥农学利用率为13.8 kg(籽粒)&middot;kg-1(P2O5)。结合拟合度、最佳经济施肥量、经济收益、肥料农学利用率和一元模型的局限性分析得出, 二元二次肥料效应模型最优, 可作为黄河三角洲地区盐碱土冬小麦氮磷肥效模型的最佳选择。</p

Theoretical Study on the Activation and Hydrogenation of Dinitrogen to Ammonia by Group 4 Metal Atoms and their Dinuclear Complexs

双氮的活化和固定是当今科学前沿的课题，将自然界资源丰富但化学上极其惰性的双氮在温和条件下转化成氨及其他各种氮化物加以利用，是化学工作者长期的目标。配位活化固氮是实现这一目标的合适的选择。而4族金属的某些配合物是有希望的固氮催化剂。本文用密度泛函理论方法较系统地研究了4族金属原子及其双核配合物促进的双氮活化氢化的机理。具体内容分为三个部分：第二章用杂化密度泛函B3LYP方法，对原子Tin(n=1-2)与双氮分子的相互作用的各种构型在三个自旋态下进行优化和能量计算。结果显示，单原子Ti的五重态比三重态与N2有更好的反应性。它与N2反应只能产生弱的Ti-η1-N2型端配物和Ti-η2-N2型侧配物，...The activation and fixation of dinitrogen is the cutting edge in the modern science. The conversion of abound but quite inert dinitrogen to ammonia or othernitrogenous compounds under mild conditions has an interest of long standing forchemists. It is realized today that the dinitrogen activation by transitionmetal-containing complexes may be the proper route to accomplish the nitrogenfixation und...学位：博士后院系专业：化学化工学院化学系_化学学号：BH1700003

Thermal testing and simulation of high power LED

随着发光二极管(LED)芯片发光效率的提高以及功率型LED芯片的制备成功，使得LED半导体固体照明成为现实。由于功率型LED与传统光源相比的突出性能以及其未来的巨大市场前景，各个国家、地区争相投资研发LED照明光源。但是功率型LED同时也存在发光效率低和发热量高的发展瓶颈。本文主要围绕功率型LED的热问题展开研究，包括单芯片和多芯片功率型LED的热测试和热仿真。具体包括以下内容： 1.阐述了LED的发展历史、发光机制以及其特点和应用，并详细说明了结温对LED性能的影响，指出对LED热问题研究的必要性。 2.介绍热传递基本原理以及LED的热学参数与热学模型，还回顾总结了LED热阻的各种测量方...With the increasing luminous efficacy of Light emitting diodes(LEDs) and the successful fabrication of high power LED(HP-LED) chips, white HP-LED based solid-state lighting becomes feasible. Due to the outstanding benefits of LEDs compared with the traditional light sources, as well as the huge promising future markets, governments and industries around the world have put huge investments into th...学位：理学硕士院系专业：物理与机电工程学院物理学系_理论物理学号：1982006115177

The feasibility study on applying tensegrity systems to art and architecture

张拉整体结构是一种新兴的非主流结构型式，也是国际新型空间结构发展的热点。它完全颠覆了传统结构必须保证压力通过有刚度构件连续传递的力学逻辑，在不依赖外部任何条件（包括重力）的情况下，仅由结构内部连续受拉和分离受压的两种结构构件实现自应力自平衡。 本文基于西方学者研究的基础上，首先就张拉整体结构的基本概念、历史起源、结构原理一一进行介绍。其次对张拉整体结构进行分门别类，并在分析类张拉整体——索穹顶的基础上进一步明确了二者的界限。再次通过大量的模型、雕塑和分析图例，以尽可能地展现张拉整体结构独特的美学特征。最后，在分析现今众多称之为或被称之为是张拉整体结构的设计和方案的基础上，提出了一座步行桥梁设...Tensegrity is a rising and atypical kind of structure, and is also an international hot spot of the development of a new type of spatial structure. It completely subverts the conventional structural systems, which requires that compression must be transmitted through stiff components continuously. With no outer factors, such as gravity, this new type of structure, in order to keep self-stress and ...学位：文学硕士院系专业：艺术学院_设计艺术学学号：1862010115341

THE IMPLICATION OF PLC-γ2 IN GASTRIC CANCER MGC80-3 CELLS TREATED BY TPA

目的探讨佛波酯(TPA)处理人胃癌MGC80-3细胞过程中磷酯酶Cγ-2(PLCγ-2)的意义。方法通过DAPI染色,荧光显微镜观察分析TPA对胃癌MGC80-3细胞的影响;借助核浆分离手段获得胃癌细胞核浆蛋白,并通过免疫印迹(Western blotting)检测TPA对PLCγ-2蛋白表达水平影响;通过免疫荧光技术处理,激光扫描共焦显微镜观察胃癌细胞内PLCγ-2蛋白的定位和转运;用PLCγ-2的抑制剂(U73122)预处理细胞,免疫印迹和激光扫描共焦显微镜分别检测其对TPA作用胃癌细胞内PLCγ-2的影响;以及荧光显微镜下观察分析U73122是否影响TPA对胃癌细胞的作用。结果TPA诱导胃癌MGC80-3细胞凋亡;同时TPA提高PLCγ-2蛋白表达水平,并诱导其发生核浆转运;其抑制剂(U73122)可以降低TPA对PLCγ-2蛋白表达水平的作用,但并不能影响TPA诱导胃癌细胞凋亡;而TPA诱导的PLCγ-2核浆转运却没有被PLCγ-2抑制剂(U73122)阻止。结论尽管TPA提高了胃癌MGC80-3细胞中PLCγ-2表达水平,但PLCγ-2表达水平和TPA诱导的胃癌MGC80-3凋亡没有直接关系,而其核... 【英文摘要】 Objective To study the implication of phosphoinositide-specific phospholipase Cγ2(PLC-γ2) in gastric cancer MGC80-3 cells treated by TPA.Methods The effect of 12-O-tetradecanoylphorbol-1,3-acetate(TPA) on gastric cancer MGC80-3 cells was detected and analyzed by DAPI staining under fluorescence microscope.The effect of TPA on the expression level of PLC-γ2 protein was detected by Western blotting,when nuclear and cytoplasmic protein fractions were prepared through lysis of cell and centrifugation.Localizati...福建省自然科学基金计划资助项目(C0310001

3D Finite Volume Scheme for Czochralski Crystal Growth

A general three-dimensional model is developed for simulation of the growth process of silicon single crystals by Czochralski technique. The numerical scheme is based on the curvilinear non-orthogonal finite volume discretization. Numerical solutions show that the flow and temperature fields in the melt are asymmetric and unsteady for 8’’ silicon growth. The effects of rotation of crystal on the flow structure are studied. The rotation of crystal forms the Ekman layer in which the temperature gradient along solid/melt surface is small