Skin Detection Technology with Fusion Approach

皮肤检测技术发展迅速,并且能够应用于检测和跟踪人体部位、计算机视觉和可视化等多个领域。然而,皮肤检测的主要困难仍然是不同程度的皮肤色调、光照条件和颜色接近肤色的背景等等。本文研究了一种新奇的基于融合策略下的动态皮肤检测,它是由一个平滑动态二维直方图、高斯混合模型和基于脸部皮肤色调颜色计算的实时动态阈值这三种检测方法融合在一起的。本研究通过人脸检测来强化肤色模型,这是因为人脸是不同色调的皮肤颜色的一个突出特征,尤其是在包含不同种族的多个人脸图像中。定性和定量实验结果表明,该方法由于其较低的计算成本和较高的精确度,比目前先进检测技术更稳定有效。The skin detection technology develops rapidly and is capable for a wide range of applications in many fields, such as detect and track the components of human body, computer vision and visualization.However,the principal obstacles faced by skin detection are still the different degrees of skin tone color, illumination conditions and skin color-like backgrounds.This paper proposes a novel skin dynamic detection based on fusion strategy, which fuses a smoothed 2-D histogram, Gaussian model and an online dynamic threshold based on the calculation of face skin tone color.In this research, we adopt face detector to refine the skin model, because face is a prominent indicator of different characteristics of skin tone color, especially in images that include more than one face with different ethnicity.Qualitatively and quantitatively experimental results show that the proposed method is more robust and effective compared to state-of-the-art methods, owing to its low computational costs and high accuracy

Application of Improved SIR Model on Information Diffusion in Microblog

研究微博中信息的传播规律对舆论预测与管控、市场营销等方面具有重要意义。当前的信息传播模型大多忽视了不同信息间、不同用户间的个体差异。为解决这一问题,本文选取了影响用户浏览和转发信息行为的特征,采用集成逻辑回归与SVM的二分类算法预测个体行为。预测多个用户对于同一信息的浏览与转发行为构成了本文中的信息传播模型。结果表明,该模型能较好地预测现实微博网络中的信息传播过程。Studying diffusion rules of information in microblog is significant for public opinion predicting and controlling, marketing and etc.The most current information diffusion models ignore the diversity of different information and different users.In order to solve the problem, this paper, by choosing the characteristics of users' browsing and retweeting behavior, uses binary-class classification algorithm based on logistic and SVM to predict individual behavior.In this paper, the information diffusion model is to predict users' browsing and retweeting behavior for given information.Simulation result shows that this model can better predict the process of information diffusion in real microblog network

Control of two-phase pitch precursor and microstructure of cross-section of carbon fibers

为给高性能碳纤维的结构设计提供理论参考,利用各向同性煤沥青(IPc)与中间相沥青形成二元不相容共混物的相分离结构,并利用筛网装置改变共混沥青的熔; 体流动状态,研究共混两相沥青的相结构对最终碳纤维结构的影响。结果表明:在共混前驱体中,掺杂的15%; IPc不足以抑制劈裂的形成;而使用15层筛网纺丝装置,促进微畴沿径向折叠排列,抑制了轴向劈裂的出现;进一步提高熔体受剪切程度,各向同性相形成贯穿; 的条带结构,纤维截面重新出现劈裂结构。30%的各向同性相抵抗了碳纤维中的裂纹扩展,碳纤维最终形成介于放射状和无规的截面形貌;使用50层筛网装置,; 纤维截面中出现类似的劈裂结构受到抑制一重新出现劈裂结构的演变过程。结果证实了相分离和筛网装置对中间相微畴在纤维中排布方式的协同影响作用。In order to provide academic reference for structure design of; high-performance carbon fibers (CFs),blends of composed isotropic (IPc); and mesophase pitches in various proportions were used as precursors for; CFs. A filter assembly was further used to disturb the melt flow during; the spinning of precursor fibers. The phase structure of; isotropic/mesophase incompatible blends on the microstructure of the; resultant CFs were studied. Results shows that 15% of IPc in the blended; precursor can not prevent the open crack along the carbon fiber axis,; while the split has been completely depressed in the carbon fibers when; spun with 15 layers of plain-weave, in which the IPc component exhibited; disorder oriented strips form to promote the zigzag connection among the; graphitic microcrystallites along the cross-section of CFs. Shear of the; extrusive pitch melt further increasing, the IPc phase exhibits a; perforative structure and the open crack reappears in the cross-section; of CFs. When the content of IPc is 30%,isotropic phase resists the; evolution of the open crack,and an intermediate morphology between; radial and random type is shown in the CFs. The similar evolution of the; open crack is shown in the cross-section of CFs when the 50 layers of; plain-weave is used. The results confirm the synergy effect of the; incompatible phase-separation of the blends and the filter assembly on; the arrangement of the graphitic microcrystallites along the; cross-section of CFs.中央高校基本科研业务费专项资金项

大学生“村官”社交心态探析

在对福建泉州大学生“村官“基层社会关系调研的基础上,文章首先分析了大学生“村官“基层社会关系呈现的社交格局差序化、社交联结功能化、社交互动结构化和社交测量复杂化等特质,随后指出其在基层社会交往中存在的问题,并从大学生“村官“软实力打造和政府层面的制度保障两个角度进行思考

董事会之谜——基于尚德电力的案例研究

本文以尚德电力案例为对象,探讨理论上“完善“的董事会制度是否必然带来理想的治理效果。我们的分析表明,尚德的失败主要与不合理的关联交易、重大错误决策、管理层失察等有关;而尚德又拥有勘称范本的董事会制度:董事会独立性强、董事专业背景好、委员会设置合理且规范。我们的讨论倾向于认为,尚德的董事会没有发挥监督和决策作用。在美上市“中概股“公司董事会制度的进一步比较表明,即便是依据严格监管条例建立起来的董事会制度,亦未能阻止部分公司走向经营失败。在此基础上,本文提出“董事会之谜“,即:董事会是否能够有效发挥监督和决策作用、甚至董事会究竟发挥什么样的作用,就目前的研究文献来看,仍然是一个待解之谜。国家自然科学基金(71272079;71002044); 教育部人文社会科学重点研究基地重大项目(11JJD790032); 福建省财政厅专项基金(会计信息·资源配置·社会效率); 中央高校基本科研业务费教师类基础创新科研基金(2013221015)的支

Breeding high-yield oil-producing strain to use cheap carbon source by UV induced protoplast mutagenesis

【目的】研究并建立利用原生质体紫外诱变技术选育可利用廉价碳源发酵的高产油新菌株的方法。【方法】采用1.5%蜗牛酶和1.0%纤维素酶混合液水解去除细胞壁得到2A00015(近平滑假丝酵母,CAndIdA PArAPSIlOSIS)的原生质体,将其放于紫外灯下诱变及再生壁培养,筛选获得可利用廉价碳源发酵的高产油酵母,并采用气相色谱质谱联用法(gC-MS)测定其脂肪酸组成。【结果】突变效果最好的突变菌株2A00015/25用葡萄糖发酵培养7 d后,其生物量、油脂产率和产油量分别为17.77 g/l、58.12%和10.32 g/l,较原始菌株分别提高了12.45%、23.32%和38.68%;利用废糖蜜发酵培养,其生物量、油脂产率和产油量分别为18.54 g/l、49.44%和9.17 g/l,较原始菌株分别提高了9.09%、21.16%和32.18%。利用废糖蜜培养其产油效率虽低于利用葡萄糖培养,但从环境保护及原材料成本的角度考虑,用废糖蜜作为碳源发酵培养产生油脂更具优势。诱变菌株利用废糖蜜发酵后产生油脂经检测含有8种脂肪酸,其脂肪酸组成与植物油近似,其中不饱和脂肪酸含量占脂肪酸总量的82.4%。【结论】通过利用原生质体紫外诱变技术,成功选育出一株新的可利用廉价碳源的高产油海洋菌株,产油率达到49.4%,提高了21.2%。[Objective] We used UV induced protoplast mutagenesis to study breed a new high-yielding lipid-producing strain which could use cheap carbon source.[Methods] Get the 1.5% glusulase and 1.0% cellulose solution.Hydrolyze to remove the cell wall and obtain the protoplast of 2A00015(Candida parapsilosis).Put it under the ultraviolet lamp for mutagenesis and cultivate regenrated wall.Then screen to get the high oil generated yeast which could be fermented by low-cost carbon source.Determine its fat acid components by gas chromatography with mass spectrometric(GC-MS).[Results] Cultivated the mutant strain with best mutation 2A00015/25 in the glucose.We found that the biomass, oil yield rate and oil production are separately 17.77 g/L, 58.12% and 10.32 g/L, which are separately 12.45%, 23.32% and 38.68% higher than the original strain.We have also cultivated the mutant strain in the waste molasses and found the biomass, oil yield rate and oil production are separately 18.54 g/L, 49.44% and 9.17 g/L, which are separately 9.09%, 21.16% and 32.18% higher than the original strain.The oil yield rate is lower in the waste molasses cultivation than that in glucose cultivation.However, in consideration of environment protection and cost of raw materials, the waste molasses is of much more advantages.It is tested that the fat generated from the waste molasses fermentation consists of eight kinds of fat acid.Its fat acid components are similar to the vegetable oil, in which the content of unsaturated fatty acid comprised 82.4% of the total fatty acid.[Conclusion] Basing on UV induced protoplast mutagenesis, we have successfully bred a new high-yielding oil strain which can make use of the low-cost carbon source, with its oil production rate 49.4% which has increased by 21.2%.深海(微)生物资源勘探与资源潜力评价项目(No.DY125-15-R-01

FICM干预对急性运动大鼠抗氧化能力的影响

目的:探讨远红外陶瓷微珠对大鼠一次性力竭运动后血清SOD、GSH-Px、MDA含量的影响。方法:将88只雄性SD大鼠分为安静对照组(A组)、模型组(B组)、模型+热水组(C组)、(模型+陶瓷微珠组D组)。B、C、D组大鼠利用下坡跑跑台一次性运动至力竭。各组大鼠分别于安静时与运动后即刻、24h、48h、72h取心脏血,分离血清测定SOD、GSH-Px、MDA含量。结果:D组运动后各时相血清SOD、GSH-Px含量均高于B组与C组同时相(P <0. 05),D组运动后各时相血清MDA含量均低于B组与C组同时相(P <0. 05)。结论:陶瓷微珠干预手段具有抑制急性运动后机体氧自由基生成,减少过氧化损伤的作用。福建省科技厅省自然科学基金项目(2016J01404);;莆田学院育苗基金项目(2017014);莆田学院国家基金预研项目(2016076);;国家体育总局科技服务项目(2017HT008

The overview of rapid prototyping technique

【中文文摘】在研究快速原型技术发展历史和现状的基础上,介绍了快速原型制造的基本原理,重点介绍几种发展较成熟的RP技术的基本原理,分析RP技术的特点,并探讨其应用价值和发展前景,提出了目前发展快速成型的基本观点和未来发展趋势。 【英文文摘】Based on the history and development of rapid prototyping technique,the principles of Rapid Protyping(RP),especially several developed techniques,are introduced.The characteristics of RP techniques are analyzed and the opinions about future development tendency and prospect are put forward.福建省自然基金项目(k32014);; 国家留学回国人员基金资助项目(k3003

The Application of PLC in Pneumatic Control Electrode Board Cutting Machine

【中文文摘】本文详细阐述了气动控制系统、光电检测、可编程控制器在气动电极板剪切机中的应用。 【英文文摘】The pneumatic control system,optoelectronic detection system,the application of PLC in pneumatic control electrode board cutting machine was introduced in detail

各向同性沥青改性的中间相沥青纤维预氧化研究

以各向同性沥青改性的中间相沥青为原料,经熔融纺丝、氧化及碳化处理得到沥青基碳纤维,重点研究了原丝的氧化行为.偏光显微镜研究表明,混合沥青为两相不相容共混物,中间相沥青为连续相,各向同性沥青为分散相.氧化过程中,沥青的脂肪氢和芳氢被脱除,主要生成羰基,醚键.随着氧化时间的延长,纤维中含氧量逐渐提高.当氧化时间较短时,纤维氧化不足,碳纤维芯部出现孔洞,微观组织呈现大片层结构.随着氧化程度逐渐提高,截面孔洞逐渐减小并最终消失,同时,碳纤维的强度显著提高;但是当原丝过度氧化时,碳纤维强度反而下降