Design and Implementation of 3D Animation “Journey”

三维动画又称3D动画，是近年来随着计算机软硬件技术的发展应运而生的新兴产物，并被广泛应用于影视、教育、娱乐等诸多领域。 随着时代进步，三维数字动画正逐步取代传统的二维手工动画，进入无纸动画的时代。现今上映的大制作影片中，几乎都应用到大量的三维动画技术。在视觉感受上，运用三维技术完成的动画，要比二维动画来的更加真实而丰富，更符合当代人对影视作品的审美。 本文以三维动画短片《旅途》的创作为项目背景，根据剧本进行原画的设计和创作，并通过对计算机技术实现该角色模型的建立和动作，最终输出画的完整过程讨论了3维技术的实现。论文首先介绍了根据项目背景，简单的讨论了角色设计的基本概论，以及使用计算机三维技...Three dimensional animation, also known as 3D animation, is a new product resulting from development of computer hardware and software technology in recent years. It is widely used in film, television, education, entertainment and many other domains. As time goes by, digital painting is replacing the traditional 2D hand animation gradually. This is a new epoch of paperless animation. In recent ye...学位：工程硕士院系专业：软件学院_工程硕士(软件工程)学号：X201023034

Experimental Investigation of Rayleigh-Ludwig Instability on Aircraft Wake Vortex

飞机尾涡是与升力相关的固有的流动现象，是流体流过有限长机翼在机翼翼尖位置卷起的具有轴向速度和切向速度的三维漩涡，它对后续切入尾流的飞机构成一定的安全威胁。因此，为了保证民航机在机场起飞和降落的安全，国际民航组织（ICAO）规定了前后飞机起降时间间隔的尾流间隔标准。根据该标准，飞机在起降过程需要与前面的飞机保持足够的安全时间间隔，但这样便减小了机场飞机的起降频率，影响了民航运输业的经济效益。为了解决该问题并提高飞机起降过程的安全性，就需要对如何控制并尽快消减机翼尾流进行探究。研究发现，通过主动引入扰动来诱发尾涡不稳定性是一种行之有效的消弱尾涡的方法。诱发尾涡的不稳定性方法多种多样，其中Rayle...Aircraft wake vortex is an inherent phenomenon connecting with the lift- generating mechanism. It exhibits in the form of tri-dimensional vortex generated by limited wings at the wing tip. It would introduce great hazard to following flight and threaten to the flight safety. In order to ensure the aircraft safety at the airport terminal, especially during taking off, approaching and landing, a sep...学位：工学硕士院系专业：物理与机电工程学院_航空宇航制造工程学号：3202010115268

Experimental Study of Spoiler Influence to Delta Wing Detached Vortex

在染色法流动显示实验的基础上,进一步深入研究了扰流片在不同标高攻角和来流速度情况下对70°三角翼脱体涡的影响。PIV测试结果表明,在适当位置,扰流片对三角翼的脱体涡的破裂具有一定的延迟作用,在扰流片的诱导涡与三角翼脱体涡方向一致时,脱体涡破裂延迟越靠后

淡水鱼类狭腹鳋属一新种

<正> 作者于1988年4—5月参加了武陵山区鱼类寄生虫的调查工作,收集到一些寄生桡足类标本,经整理,发现了一种以往文献未记载过的狭腹鳋新种,现报道如下: 模式标本保存于中国科学院水生生物研究所鱼病研究室,文中量度单位为mm

Numerical Simulation of the Nozzle with Self-Oscillating Flow Using the Vof Model

普通喷嘴喷出的水柱是直线型的,在普通喷嘴中加入倒u型和三角形结构,就能够使得喷嘴喷出来的水柱呈现振荡形式。利用多相流VOf(VOluME Of fluId)模型模拟内建振荡结构的喷嘴的喷射流动过程,Cfd仿真结果显示,喷嘴喷射的水柱呈现上下摆动的状态,和真实情况相吻合。The jet water shape of the nozzle will become a self-oscillating shape,if the triangle and U shape models are made into the normal nozzle.Using the Vof model,the jet shape of the nozzle will be simulated through a commercial CFD software FLUENT.The Vof model(Volume of Fluid) is a surface-tracking technique applied to a fixed Eulerian mesh.It is designed for two or more immiscible fluids where the position of the interface between the fluids is of interest.The CFD simulation results shows that the jet shape of the nozzle is oscillate in a fixed period

Control method for aircraft wake vortex based on Rayleigh-Ludwig instability

在飞机飞行的过程中尾涡会伴随着升力产生,威胁后机的飞行安全.在简化机翼模型上添加扰流片,通过一个矩形翼以引入一个与主翼尾涡大小不同、方向相反的小涡,构建尾流自消散四涡系统,以期诱发尾涡的rAylEIgH-ludWIg相交不稳定性.通过改变扰流片的大小形状,调整模型的攻角和拖曳速度,采用粒子图像速度场仪测量系统定量研究在低雷诺数下单主翼尾涡发展特性以及双涡相互作用特性.研究表明:在未添加扰流片时,尾涡环量在45个翼展内相对于初始环量基本保持不变;在添加扰流片的情况下尾涡的环量衰减可以达到35%~55%,而未添加的基本翼型的尾涡的环量则几乎保持不变,这说明添加适当的扰流片能诱发尾涡的rAylEIgH-ludWIg相交不稳定性,加速尾涡的消散,当小涡和主涡的初始环量比为-0.489、初始距离比为0.5时,45个翼展范围内,尾涡环量衰减55.9%.本文系统性的实验结果可以为低尾流机翼的设计提供参考依据.The aircraft wake vortex is an inherent flow phenomenon due to the lift generation mechanism,which has a negative impact on the flight safety.By adding a set of specially designed spoiler,a rectangular wing was designed to generate a pair of weaker vortices,which had different sizes and opposite direction compared to main wing vortices,thereby constructing a self-destructive four-vortex wake system to induce Rayleigh-Ludwig instability.Under different experimental conditions,in terms of changing the size or shape of the spoiler,towing speed and angle of attack,the wake vortex development of the test model,that both with and without spoiler,as well as the circulation analysis,were acquired particle image velocimetry( PIV) measurements under the low Reynolds number.The study demonstrates that the decrease in circulation was 35% to55% in 45 wingspans when spoilers are introduced,whereas the counterpart of the baseline airfoil,without spoilers,is nearly kept steadily,which reveal the application possibility of Rayleigh-Ludwig instability in alleviating the wake vortex.As the initial circulation ratio equals to- 0.489 and the initial distance ratio is0.5,the circulation of the primary vortex reduce most significantly( 55.9%) in 45 wingspans.Results would provide a scheme in the design of airfoils with weaker vortices.国家自然科学基金(11072206

Comparison of uncut Roux-en-Y anastomosis and traditional Roux-en-Y anastomosis in the totally laparoscopic distal gastrectomy for gastric cancer: An analysis of multiple centers' data

目的对比非离断式(Uncut)Roux-en-Y吻合和传统Roux-en-Y吻合应用于全腹腔镜远端胃癌根治术后消化道重建的安全性和短期疗效。方法回顾性分析国内10家单位共60例远端胃癌根治术后全腹腔镜消化道重建的胃癌病人临床资料,根据消化道重建方式不同分为Uncut Roux-en-Y组(Uncut组)34例,传统Roux-enY组(传统组)26例。结果 Uncut Roux-en-Y吻合在消化道重建时间方面用时更短[(51.5±13.3)min vs.(80.4±16.2)min,P=0.000],出血量更少[(60.0±35.6)m L vs.(132.9±65.1)m L,P=0.000],且在进食半流饮食时间方面具有优势[(4.6±1.5)d vs.(7.2±2.3)d,P=0.000]。两组病人在留置胃管时间、术后排气时间、进食流质时间和术后住院时间方面差异无统计学意义。两组病人均无围手术期死亡病例,并发症发生率差异无统计学意义(8.8%vs.7.7%,P=0.875)结论 Uncut Roux-en-Y吻合和传统Roux-en-Y吻合应用于全腹腔镜下消化道重建安全可行,Uncut Roux-en-Y吻合在重建时间和控制出血量方面具有优势。Objective To compare the security and short-term effect of the digestive tract reconstruction during the totally laparoscopic distal gastrectomy for gastric cancer between the Uncut Roux-en-Y anastomosis and the traditional Roux- en- Y anastomosis. Methods The clinical data of 60 gastric cancer patients with digestive reconstruction underwent totally laparoscopic distal gastrectomy between December 2012 and June 2015 in 10 domestic hospital were analyzed retrospectively. According to the difference of digestive reconstruction,it can be divided into the Uncut Rouxen-Y anastomosis group with 34 patients and the traditional Roux-en-Y anastomosis group with 26 patients. Results In uncut Roux-en-Y anastomosis group,the operative time in digestive reconstruction was shorter[(51.5±13.3)min vs.(80.4±16.2)min,P=0.000]; the intraoperative blood loss was less[(60.0±35.6)m L vs.(132.9±65.1)m L,P=0.000];semi-liquid diet time was earlier[(4.6±1.5)d vs.(7.2±2.3)d,P=0.000]. However,there was no difference between the two groups on nasogastric tubegastrointestinaltwo groups on nasogastric tube,gastrointestinal transit,fluid diet and the duration of postoperative hospital stay. Both groups had no death case during the perioperative period and there was no significant statistical difference in the postoperative complication rates(8.8% vs. 7.7%,P=0.875).Conclusion The Uncut Roux- en- Y anastomosis and the traditional Roux-en-Y anastomosis are both safe and feasible for the digestive reconstruction under the totally laparoscopic distal gastrectomy for gastric cancer. Besides,the Uncut Roux- en- Yanastomosis has other advantages such as less reconstruction time and less bleeding.广东省科技计划项目(No.2014A020212591

Distribution pattern of PAHs in Jiulong River Estuary by both measurement and simulation

于2011年12月(冬季)在厦门九龙江河口及西港采集9个表层海水水样,采用固相萃取—气质联用方法(SPE-GC-MS)分析其中16种多环芳烃含量。研究结果表明,总溶解态态∑PAH含量为157.9~858.0 ng/L。在河口区,随着盐度升高,PAHs含量逐渐降低。基于比值法分析,表明厦门九龙江及西港海域海水中的PAHs来源存在多种途径,呈现混合来源的态势。利用LEVEL III逸度模型研究菲,芘和苯并(a)芘在各介质间的分布以及水——气界面的交换通量。模拟结果与本文实测和文献中的实测值相吻合。在16℃时,三种多环芳烃的大气沉降通量分别为17.38,7.86和8.38μg/day/m2。其中菲在大气沉降中占主导地位,约三分之二。三种多环芳烃的大气沉降通量均随温度升高而减少。当温度高于32℃时,苯并(a)芘开始从水体释放。The concentration of 16 polycyclic aromatic hydrocarbons( PAHs) of nine water samples,collected in the Jiulong River Estuary in December,2011,were analyzed using the SPE-GC-MS method. The results showed that the concentration range of total dissolved PAHs( ΣPAHs) was from 157. 9 to 858. 0 ng / L. The horizontal distribution illustrated that the concentration of ΣPAHs decreased as salinity increased. Based on ratio analysis,PAHs have complicated sources. A Level III fugacity model was developed to simulate the multimedia fate of PAHs and to study the air-water exchange fluxes of three PAHs( phenanthrene,pyrene,benzo[a]pyrene) in the Jiulong River Estuary. The calculated concentration of PAHs was similar to that measured in this study or reported in earlier literature. At 16℃,the net atmosphere deposition fluxes of these PAHs were 17. 38,7. 86 and 8. 38 μg / day / m2. Phenanthrene was predominant in the atmospheric deposition. The net atmospheric deposition fluxes of these PAHs all decreased with tem-perature. When the temperature was above 32. 0℃,benzo[a]pyrene was released from the water into the air.国家自然科学基金(40776044);; 福建省自然科学基金(2012J05078);; 福建省杰出青年科学基金(2014J06014);; 中央高校基本科研专项(20720140507

Studies on chemical constituents in ethanolic extract from Acanthus ilicifolius as a pharmaceutic mangrove

目的探讨老鼠簕的化学成分。方法将老鼠簕全株粉碎后,用95%乙醇浸提3次,合并浓缩,浸膏的石油醚部位经反复硅胶柱层析分离,结合波谱学数据鉴定化合物结构。结果从石油醚部位分离得到8个化合物,分别为β-谷甾醇(Ⅰ)、豆甾醇(Ⅱ)、正十六烷酸(Ⅲ)、正二十八烷酸(Ⅳ)、4,22-二烯-3-酮豆甾烷(stig-masta-4,22-dien-3-one)(Ⅴ)、4-烯-3-酮豆甾烷(stigmast-4-en-3-one)(Ⅵ)、5,22-二烯-7-酮-3β-羟基豆甾烷(3β-hydroxystigmasta-5,22-dien-7-one)(Ⅶ)、2-唑啉酮(2-benzoxazolinone)(Ⅷ)。结论其中Ⅴ,Ⅵ,Ⅶ为首次从该植物中分离得到。Objective To study the chemical constituents of Acanthus ilicifolius.Methods The air-dried and powdered plant material was extracted with 95% ethanol.Silica gel and Sephadex LH-20 column chromotography were used in the isolation from the ethanol extracts of the whole plant,the compounds were determined on the basis of various modern spectroscopic analyses and physical constants.Results Eight compounds were isolated from the petroleum ether soluble portion,identified as β-sitosterol(Ⅰ),stigmasterol(Ⅱ),n-hexadecane acid(Ⅲ),n-octacosanic acid(Ⅳ),stigmasta-4,22-dien-3-one(Ⅴ),stigmasta-4-en-3-one(Ⅵ),3β-hydroxystigmasta-5,22-dien-7-one(Ⅶ) and 2-benzoxazolinone(Ⅷ).Conclusion CompoundⅤ,Ⅵ,Ⅶ were obtained from the genus for the first time.国家自然科学基金(30671646);; 福建省科技计划资助项目(2003Y036

重视南方滨海地区城镇园林绿化树种盐害的研究

介绍国内外城镇园林绿化树种耐盐性的研究概况、城市土壤盐分的来源、盐分在土壤中的移动、盐害发生的原因、影响植物耐盐性的因素及盐害的诊断和宜采取的措施等，指出开展南方滨海地区城镇园林绿化树种盐害的研究 ,尤其是筛选耐盐树种是目前面临的紧迫任务