Study on the Status Quo and Educational Countermeasures for students’ psychological health in Southern Fujian Region colleges and universities

随着经济、社会的快速发展，高校学生的心理健康问题受到社会各界的广泛关注。为了深入了解闽南地区高校学生心理健康及教育现状，采用文献资料法、问卷调查法、访谈法、数理统计等方法，对闽南地区高校学生心理健康及教育现状进行了调查与研究，结果表明： 闽南地区高校学生SCL-90各因子均分大部分高于国内正常成年人常模但低于全国大学生常模，说明闽南高校学生心理健康状态好于全国大学生但逊于国内成年人；闽南地区高校女生SCL-90各因子均分高于男生，特别是在强迫、人际关系、抑郁、焦虑、恐怖、偏执等方面呈现非常显著差异，说明闽南地区高校女大学生心理健康状态劣于男大学生；闽南地区高校不同年级大学生SCL-90各因子...With the rapid development of the economy and society, the issue of college students’ psychological health has caught wide and public attention. In order to deeply understand the status quo of students’ psychological health and education in Southern Fujian Region colleges and universities, by means of literature, questionnaire, interview and mathematical statistics and so on, this paper conducts i...学位：教育学硕士院系专业：教育研究院_高等教育学学号：X200528000

正态分布近似式的研究

正态分布近似式的研究郑金成蔡淑惠王仁智郑永梅程灿东（厦门大学物理系，361005）正态分布是一种重要的概率分布，在许多情况下，简单的近似解析方程有助于问题的解决。通过将理论计算与数值模拟相结合的方法给出了一个较好的近似式。标准正态分布函数的形式为Φ（..

我国反向抵押贷款金融产品创新研究

作为一种新的金融产品,反向抵押贷款实现“以房养老”为一些西方国家所利用。在我国这样转型社会中,初步具备了实行“以房养老”的社会经济条件,推出反向抵押贷款金融产品要全方位、多层次进行思考

The Dynamic and Kinetic Behavior of InN Growth on In-polar Surface

采用第一性原理模拟计算方法,从原子层面出发,了解Inn的生长动力学行为.通过计算n和In原子于不同覆盖度下In极性表面的TOP、H3以及T4位置上的形成能和扩散势垒,了解沉积原子的相互作用和成核.结果表明,In原子比n原子更容易在干净的In极性表面吸附、粘接,并通过扩散找到稳定位置,形成一个较致密的双In原子层.模拟计算了n和In原子在双In原子层和三In原子层表面的扩散,结果显示,在稳定的双In原子层上,n原子将通过垂直扩散穿过顶部In原子层,并在两In原子层表面之间横向扩散,形成纤锌矿结构的Inn材料;然而,In原子虽然可形成三In原子层或In滴,其上沉积的n原子也仅能垂直扩散穿过顶部In原子层,长成新的Inn分子层,与Inn基底间存在双In原子层或更厚的In薄膜,形成不完整的纤锌矿结构Inn薄膜.在此基础上,我们提出一新的Inn外延两步生长法,以在生长过程中尽量保持表面只存在双In原子层结构,为高质量Inn薄膜的外延提供理论依据.We try to understand the growth kinetic behavior of InN film at the the atomic level,using the first principles simulation method.By calculating the formation energies and barriers of N and In atoms at top,h3,and t4 site under different coverages,the interreaction and nucleation behaviors of the deposition atoms were known.The results showed that In atoms are more favourite to adsorb at a stable site on In polar surface by adhesion and diffusion,and form a compact In bilayer.Furthermore,the diffusion of N and In atoms were simulated on the In bilayer and trilayer.The results revealed that the N atoms will diffuse vertically into the top In layer of the stable In bilayer,and then form a wurtzite InN layer by lateral diffusion inside the In bilayer.Although an In trilayer or droplet can exist during the epitaxy,N atoms also can only penetrate into the top In layer,leading to a In bilayer or thick In film between deposited InN layer and the InN substrate,and an incomplete wurtzite InN film formed.On the basis of above results,we porpose a two-step growth method for InN epitaxy by keeping the In bilayer to achieve high quality InN film.国家重点基础研究发展计划(973)项目(2011CB925600;2012CB619301);国家自然科学基金项目(90921002;60827004;61076084

Aeroacoustic and flow field features of ultrasonic atomizer based on Hartmann resonance tube

采用试验与数值模拟相结合的方法研究了谐振腔孔径、谐振腔深度、谐振腔与射流喷孔距离以及喷嘴压比(NPR)对基于Hartmann谐振腔(HRT)的气动式超声波雾化喷嘴外部流场及声场的影响.结果表明:当喷嘴压比大于2时,喷嘴压比增大对声场频率影响较小;当喷嘴压比小于2时,谐振腔依然能够产生高频声场,但其频率较高喷嘴压比时产生的小.当谐振腔深度小于1倍射流喷孔孔径时,此时高频声场主要由射流的不稳定性引发,声场频率与谐振腔深度经验关系式此时并不适用;当谐振腔孔径大于1.75倍射流喷孔孔径时,声场频率大小有降低趋势.谐振腔与射流喷孔距离与声场频率关系紧密,当谐振腔放置在自由射流压力增大区域时,才可获得理想高频声场.Experimental and numerical studies were carried out to investigate the effects of operation parameters,such as diameter of resonance tube,resonance tube depth,jet nozzle hole to resonance tube spacing and nozzle pressure ratio(NPR),on the flow and acoustic field characteristics of a ultrasonic atomizer based on the Hartmann resonance tube(HRT).The modifications of the geometry of HRT in spectral and flow field characteristics were studied in detail.Result shows that that,when NPR is higher than 2,the increase of NPR has little effect on the frequency,however,when NPR is lower than 2,the lower frequencies of the acoustic field are obtained.The simulation results of flow field suggest that when the length of the resonance tube is smaller than diameter of jet nozzle hole,the reciprocating phenomenon of flow in the cavity is dampened,leading to a decrease of acoustic field frequency compared with cases having longer resonance tube length,and the classical relation between acoustic field frequency and tube resonance length is not appropriate for these situations.Also,the oversized diameter of resonance tube(typically,the diameter of resonance tube more than 1.75 times the diameter of jet nozzle hole)results in a lower oscillation acoustic field frequency for the interaction of the reciprocating and the shock is weakened.Furthermore,resonance occurs when the cavity is put in the regions where pressure arises for free jet.国家自然科学基金(51406171);; 中央高校基本科研业务费(20720150180);; 福建省自然科学基金(2015J05111

Single-Scan Ultrafast Methods and Their Applications in NMR

单扫描快速采样方法利用空间编码技术,只需单次扫描就能获得二维及多维核磁共振(nMr)谱数据,极大地缩短了二维和多维核磁共振谱的采样时间,有望在nMr领域得到广泛的应用.该文以离散编码单扫描快速采样方法为例阐明了单扫描快速采样方法的原理,介绍了连续幅度调制、连续相位调制等各种单扫描快速采样新方法及其在nMr领域中的应用,指出了单扫描快速采样方法的局限性,并对其未来发展进行了展望.Single-scan ultrafast method can be used to obtain two-dimensional and multi-dimensional NMR spectra within a single scan via spatially encoding technique,thus greatly shortening the experimental time.It has found wide applications in the NMR field.In this review,the discrete spatially encoding single-scan ultrafast method was taken as an example to elucidate the underlying principles.Some novel single-scan methods such as continuous amplitude-modulated encoding and continuous phase-modulated encoding were discussed.The applications of the single-scan methods were introduced and their limitations were analyzed.The perspective of this technique was briefly discussed.国家自然科学基金资助项目(10875101);福建省自然科学基金计划资助项目(2008J0028

电动客车双电机章动耦合驱动系统控制策略

为了降低纯电动汽车的能量消耗，提高电动汽车的续驶里程，以一种新型双电机章动耦合动力系统为研究对象，提出了以最小电功率为目标的控制策略。基于整个控制策略框架，将控制策略分为上、中、下3层。上层控制策略为需求转矩计算，根据驾驶员意图、道路信息、电池信息等，准确获取汽车的需求转矩；中层控制策略为驱动模式划分和功率分配，模式划分依据以车速作为逻辑门限值，以最小电功率为目标制定双电机转速转矩分配策略，实现双电机动力系统功率分配；下层控制策略为模式切换过程控制，为减小模式切换的动力落差，在单电机模式切换至双电机模式过程中，采用降功率方法处理。最后，在Matlab/Simulink中建立双电机动力耦合系统仿真模型，验证了该控制策略的可靠性

Study on Approximate Formula to Probability Integral

正态分布近似式的研究＠郑金成＠蔡淑惠＠王仁智＠郑永梅＠程灿东￥厦门大学物理学系正态分布近似式的研究郑金成蔡淑惠王仁智郑永梅程灿东（厦门大学物理学系厦门361005）正态分布是一种重要的概率分布，许多随机变量都精确或近似地服从这一分布规律，而且它是多种概率的...A new approximate formula to probability integral is deduced by using theoretical analysis combining with computer numerical simulation.国家自然科学基金;福建省自然科学基金;厦门光电公司工业部资

贵州丽松鼠亚科动物资源调查

松鼠科丽松鼠亚科动物具有分布广、适应性强的特点,因种群量大而成为影响森林生态平衡的重要动物之一。贵州喀斯特地貌发育典型,植被类型多样,且在兽类区划上位于华中区和华南区的过渡地带,拥有较高的丽松鼠动物资源量,但长期以来缺乏系统的资源调查与数据整理。为此,本研究利用文献资料,结合采样调查与红外相机监测对贵州丽松鼠亚科动物进行了初步调查整理,结果表明:(1)贵州分布的丽松鼠主要包括赤腹松鼠、隐纹花松鼠、红腿长吻松鼠和珀氏长吻松鼠。(2)4种中,赤腹松鼠捕获率为0.64%、隐纹花松鼠为0.15%、红腿长吻松鼠0.089%、珀氏长吻松鼠0.11%。赤腹松鼠分布广泛,遍布全省,为优势种; 红腿长吻松鼠分布相对狭窄,此外,贵州丽松鼠亚科动物集中分布在黔东北低山丘陵州和黔南低山河谷省,黔西西北部高原州物种分布最少。(3)随海拔的上升丽松鼠的分布逐渐减少,4种丽松鼠主要集中分布在900～1500 m之间海拔地带。(4)赤腹松鼠多活动在以马尾松、杉木等为主的针叶林和针阔混交林,红腿长吻松鼠活动在具开阔林窗的阔叶林带,珀氏长吻松鼠则经常出没在农耕地附近和灌丛中,阔叶林、针阔混交林则是隐纹花松鼠最常利用的生境。本文基本摸清贵州丽松鼠动物的分布与资源状况,将对这类动物资源的保护管理与科学研究提供重要的基础资料

Research on the Energy-Storage Characteristics of Super Capacitors

基于超级电容器等效电路模型,本文推导了超级电容器等效阻抗函数,研究了恒流充电时的超级电容器的储能基本特性。并结合实验方法,对超级电容器的端电压波动、容量、循环寿命、漏电流进行了广泛测量。在理论分析与实验对比的基础上,根据超级电容器的内部结构探讨了部分特性变化的理论原因,为高效应用超级电容器的储能研究提供了科学依据。Based on equivalent circuit models of a super-capacitor,this paper has proposed an equivalent-resistance function for super-capacitors and investigated basic characteristics under constant-current charging conditions.By use of experimental testing methodology,termination voltage ripples,capacitance,cycle-lifetime and leakage current have been tested and analyzed.By comparing both theoretical and experimental results,the reason for partial characteristics variation of super-capacitor's internal structure has been investigated and discussed.These chievements are essential for some critical applications of super-capacitors.福建省重大科技项目资助(NO．2006H0092