A Neural Network Recognition Method of Shape Pattern

A new pattern recognition method of shape was presented based on artificial neural network theory.The method avoids the defects of shape pattern recognition with polynomials and it has strong disturbance resistance.It has been proved to be superior in recognizing different shape patterns by identifying many sorts of working sample books which the results are known.

Effect of Quadrat Shape on Spatial Point Pattern Performance of Haloxylon ammodendron

In this study, we investigated the natural growth of Haloxylon ammodendron forest in Moso Bay, southwest of Gurbantunggut Desert. Random sample analysis was used to analyze the spatial point pattern performance of Haloxylon ammodendron population. ArcGIS software was used to summarize and analyze the spatial point pattern response of Haloxylon ammodendron population. The results showed that: 1) There were significant differences in the performance of point pattern analysis among different random quadrants. The paired t-test for variance mean ratio showed that the P values were 0.048, 0.004 and 0.301 respectively, indicating that the influence of quadrat shape on the performance of point pattern analysis was significant under the condition of the same optimal quadrat area. 2) The comparative analysis of square shapes shows that circular square is the best, square and regular hexagonal square are the second, and there is no significant difference between square and regular hexagonal square. 3) The number of samples plays a decisive role in spatial point pattern analysis. Insufficient sample size will lead to unstable results. With the increase of the number of samples to more than 120, the V value and P value curves will eventually stabilize. That is, stable spatial point pattern analysis results are closely related to the increase of the number of samples in random sample square analysis.

The study of the shape anisotropy in patterned permalloy films

In this paper a systematic ferromagnetic resonance study shows that an in-plane magnetic anisotropy in the patterned micron octagon permalloy （Ni80Fe20） elements is mainly determined by the element geometry. The easy-axis is along the edge of the elements, and the hard-axis is along the diagonal. The shape anisotropy of the octagon elements is determined by square and equilateral octagon, and the theoretical calculation was studied on the shape anisotropy. The shape anisotropy of rectangular was calculated by using the same theory.

Comparison of Drags on Fish Cages of Different Shapes

The effects of the direction of current on the drag on fish cages are studied in the present paper. The drags on cages of different shapes, including cylindrical, tnmcated conical, cuboidal and hexagonal, are compared. The drag on the tnmcated conical net is smaller than that on other shapes of the same area. This net shape with a small apex angle is suggested for the design of fish cages.

Behaviour of layered sandstone under Brazilian test conditions:Layer orientation and shape effects

The experimental study in this paper focuses on the effects of the layer orientation and sample shape on failure strength and fracture pattern of samples tested under Brazilian test conditions(i.e.diametrical loading of cylindrical discs)for one particular layered sandstone which is from Modave in the south of Belgium.The variations of the strength in combination with the failure patterns are examined as a function of the inclination angle between the layer plane and the loading direction.The experimental,results clearly show that the induced fracture patterns are a combination of tensile and/or shear fractures.In shape effect experiments the layer thickness and the number of layer boundaries are investigated.Different blocks of Modave sandstone are used to prepare samples.The layer thickness is different among the various blocks,but the layer thickness in each studied rock block can be considered to be constant;hence,the number of layer boundaries changes according to the sample diameter for samples of the same block.The experimental study shows that the layer thickness plays a more important role than the number of layer boundaries per sample.

Fuzzy Jamming Pattern Recognition Based on Statistic Parameters of Signal’s PSD

In order to recognize the jamming pattern in anti-jamming, a novel fuzzy jamming recognition method based on statistic parameters of received signal’s power spectral density (PSD) is proposed. It exploits PSD’s shape factor and skewness of received signal as classified characters of jamming pattern. After the mean center and variance of each jamming pattern are calculated by using some jamming samples, an exponential fuzzy membership function is used to calculate the membership value of the recognized sample. Finally, the jamming pattern of received signal is recognized by the maximum membership principle. The simulation results show that the proposed algorithm can recognize common eight jamming patterns accurately.

基于空间密度聚类和K-shape算法的城市综合体负荷模式聚类方法

城市综合体作为新兴负荷种类,其负荷预测的精度直接影响电网的规划与安全运行。然而城市综合体负荷模式易受外部环境影响而出现异常变化,对其直接进行预测的精度不能满足实际运行的要求,需要对城市综合体负荷进行聚类以提取不同的负荷模式来提高预测的精度,因此提出了一种基于空间密度聚类和K-shape算法的城市综合体负荷模式聚类方法。首先利用自适应空间密度算法(DBSCAN)根据不同区域的密度大小来提取不同季节下综合体负荷的典型日负荷曲线。然后利用K-shape聚类算法在不同季节下对不同综合体的典型日负荷曲线进行聚类分析。最后将仿真结果与K-means、K-medoids的聚类结果进行对比。仿真结果表明,与其他两种方法相比,提出的DBSCAN-K-shape两阶段负荷模式聚类方法对城市综合体负荷进行聚类在不同的聚类指标下均具有较高的精度。

Circular object recognition based on shape parameters

To recognize circular objects rapidly in satellite remote sensing imagery, an approach using their geometry properties is presented. The original image is segmented to be a binary one by one dimension maximum entropy threshold algorithm and the binary image is labeled with an algorithm based on recursion technique. Then, shape parameters of all labeled regions are calculated and those regions with shape parameters satisfying certain conditions are recognized as circular objects. The algorithm is described in detail, and comparison experiments with the randomized Hough transformation （RHT） are also provided. The experimental results on synthetic images and real images show that the proposed method has the merits of fast recognition rate, high recognition efficiency and the ability of anti-noise and anti-jamming. In addition, the method performs well when some circular objects are little deformed and partly misshapen.

Demagnetizing factors in patterned CoNiFe films with rectangular elements

CoNiFe patterned films with rectangular elements, all 600-nm wide but of different lengths, were fabricated and inves- tigated by ferromagnetic resonance experiment and micromagnetic simulation. An in-plane magnetic uniaxial anisotropy was exhibited, and its value increases with the increase of the aspect ratio of the elements, which was fitted by the model, including a quasi-ellipsoid demagnetizing field and a non-uniform demagnetizing field. The relative importance of the non- uniform demagnetizing field decreased from 0.26 to 0.16 with the increase of the length-width aspect ratio of the patterned element from 1.5 to 10. The demagnetizing factors in the three principal axes were determined from the experimental data of ferromagnetic resonance, which agreed reasonably well with the values calculated by micromagnetic simulation. The calculation also indicated that the interaction between elements could be neglected when the edge-to-edge spacing between neighboring elements was larger than 3 μm in our patterned films.

Simulation Studying Effects of Multiple Primary Aberrations on Donut-shaped Gaussian Beam

In this paper, we demonstrate the variation of donut-shaped depletion pattern which influenced by multiple primary aberrations. The simulation is base on a common stimulation emission of depletion (STED) system composed by Gaussian laser and vortex phase plate. The simulation results are helpful guidelines for analyzing the aberration of depletion patterns in real situations.

开挖宽度对异形基坑L形转角区支护结构变形影响研究

为研究不同开挖宽度对基坑L形转角区支护结构变形规律的影响,基于滨州市某异形深基坑工程项目的现场实测数据,分析了基坑开挖过程中L形转角区阴阳角位置处支护结构变形规律的差异性;建立了不同基坑宽深比(B/H,B和H分别为基坑宽度和深度)的L形转角基坑模型,研究了不同宽深比条件下转角位置处阴阳角相互作用条件下支护桩水平变形的空间分布规律,进一步明确基坑L形转角区支护桩不同深度处水平变形受影响范围。结果表明:当B/H<1.0时,阳角侧支护桩浅部水平变形受转角效应影响的范围随B/H的增加呈现出明显减小的趋势,其值近似满足2.4H-B;当B/H>1.0时,阳角侧支护桩浅部水平变形受转角效应影响的范围约为1.5H;坑内底部支护桩水平变形受基坑宽深比影响不明显,受转角效应影响的范围约为0.6H;当B/H<1.0时阴角侧支护桩浅部水平变形受影响范围约为1.6H,当B/H>1.0时其水平变形受影响范围约为0.6H+B;坑内开挖底面位置处阴角侧支护桩水平变形受影响范围约为0.6H+B,受宽深比变化影响不明显。

形状文法审美下的七曲山文昌文化之纹样衍生设计研究

目的为促进七曲山景区文昌文化和景区自然资源的可持续性发展,提高景区文化宣传价值和经济价值,建立景区文化自信,提出一种基于形状文法的纹样衍生设计方案。该方案既包含形状文法的秩序之美,又融合景区的自然特征,可与景区相关产品设计进行有机融合,形成特色文创产品。方法筛选、整理、分析素材,形成感性词汇。结合文昌文化特征元素及关联传统纹样设计图元因子,并运用用户感知评价、层次分析矩阵等进行图元因子排序。随后,运用形状文法设计纹样创新图案,以相关文创产品进行设计验证。结论纹样方案包含七曲山景区特征,拓展了形状文法审美外延,形成秩序与自由的对比之美。该方案可有机融合于景区文创产品设计中,从而有效宣传景区文化,提高旅游和经济价值。

基于可拓语义的传统纹样在食品包装设计中的应用

为了满足消费者将传统文化意蕴与食品包装相结合的需求,提出一种可拓语义下的传统纹样特征提取设计研究方法。通过对唐代金银器纹样加以分析筛选,确立目标纹样基元,构建可拓语义模型;对纹样基元进行语义词汇可拓分析,得到最大设计价值区间。利用图解思维对特征语义进行可视化分析,加以形状文法进行推导演变。以某款月饼包装设计为例,采用该方法设计出数款应用方案,并对其进行模糊综合评价,获得了较高满意度。

基于形状文法的威县土布纹样再生设计应用研究

目的为了威县土布文化传承与发展,提升威县土布文化产业的经济和社会价值,提出基于形状文法的威县土布纹样创新方案。方法首先对采集到的威县土布纹样数据进行了提取、筛选和合并;其次抽取核心纹样,利用形状文法进行基本图形元素的设计;最后通过形状文法演化基本图形元素并进行新的纹样方案设计。结论这一方案设计不仅保留了威县土布的传统民间文化特征;同时紧跟时代的步伐,与当代审美相契合。将创新纹样和设计产品进行有机结合,形成威县土布特色文创产品,宣传威县土布,树立民族自信。

基于形状文法的金秀瑶族服饰纹样在文创女包中的设计应用

为挖掘金秀瑶族服饰纹样在女包设计中的应用与创新,实现民族文化与文创产品的交流融合,结合形状文法对金秀瑶族的服饰纹样进行深入探讨。首先,通过实地考察,并选择具有代表性的金秀瑶族服饰纹样,根据其艺术特征进行归类,并从中提取造型要素,构建出初始纹样的素材库;其次,应用形状文法推演规则,使初始纹样经过演化和转换并生成新纹样,遵循现代设计手段将其应用于女包中;最后,采用模糊综合评价法对设计方案进行评价,选出最佳设计方案。验证了金秀瑶族服饰纹样在文创女包设计中的可行性,同时也为民族风格的文创产品设计提供了更加客观的设计方法,也对传承和创新金秀瑶族传统文化具有意义。

Undrained dynamical behavior of Nanjing flake-shaped fine sand under cyclic loading

A series of dynamic behavior tests on Nanjing flake-shaped fine sand were performed by using the WFI cyclic triaxial apparatus made in England. The dynamic behaviors of Nanjing flake-shaped fine sand under different static deviator stress levels and cyclic stress ratios were studied. Through comparing the effective stress path under cyclic loading with static loading, the processes of liquefaction of saturated Nanjing flake-shaped fine sand with development of dynamic pore-water pressure, including the initial compact state, compression state and dilative state, were investigated. The variation of the shear stiffness with the number of cycles and cyclic strain was investigated by analyzing the secant shear modulus in each unload-reload loop of dynamic stress-strain relationship. And by means of the exponential function, the empirical equations of the relationship between secant shear modulus Gsec, shear modulus ratio Gsec/Gmax and cyclic strain ε were established based on series of test results. The results show that according to different combinations of static deviator stress and cyclic stress, two kinds of failure patterns with deviator stress reversal or no deviator stress reversal are observed in the samples tested in this series, including cyclic mobility and the failure of accumulation residual strain. In addition, the degradation of dynamic shear modulus is due to the development of vibration pore-water pressure and it is observed that the shear modulus reduces with the progressive number of cycles.

重大突发事件冲击下农业企业组织韧性的触发与塑造

农业企业组织韧性的触发与塑造是持续稳固农业基本盘、破局不确定性困境的重要途径,应以追求韧性诱发与生成的共轭为建设农业强国的价值考量。立足“资源-能力-关系”理论框架,运用定性比较分析方法(fsQCA)探讨农业企业组织韧性的多重触发因素及不同因素组态对农业企业组织韧性的塑造机制。研究表明:财务资源、政府补助、企业创新能力、员工薪酬激励和企业社会责任无法单独触发农业企业组织韧性;资源-关系双驱动型、资源-能力-关系共创型及能力-关系协同型是农业企业组织韧性塑造的三种构型。在重大突发事件冲击下,农业企业应“刚柔并济”落实激励机制与风险共担机制,以“人和”为底层逻辑、专项支持政策为破局基石健全保障机制,助推企业逆势成长。

基于参数化设计的金秀瑶绣图案传承创新研究

目的为了促进金秀瑶绣的传承发展,使传统瑶绣更好地融入现代生活,符合现代功能与审美需求,从设计学的角度探讨非遗文化与现代设计的传承创新问题,为瑶绣非遗的保护与发展提供新的思路和策略。方法通过文献分析和田野调查,对金秀瑶绣图案进行梳理分析;借助形状语法,对图案进行纹样基元提取归类;依据镶嵌几何进行二维参数化衍生;结合NURBS曲面,生成三维参数化模型,实现二维向三维参数化的转化。结果构建了金秀瑶绣图案参数化设计路径,阐述了瑶绣非遗文化传承创新的新模式。结论在非遗数字化发展背景之下,技术的进步为传统手工艺的传承与发展提供了更多可能性,将传统瑶绣图案与参数化设计结合,既涵养了设计的内涵,又促进了瑶绣文化的可持续发展,为瑶绣在现代社会的传承创新提供合理参考,对民族文化的保护和继承具有重大价值。

清代服饰云纹探析

针对清代服饰云纹的形态和设计方法,采用文献考据法、实证研究法和比较研究法,梳理清代服饰云纹的形态演变脉络,归纳清代服饰云纹的造型特征、色彩特征和装饰功能。研究表明:清代服饰云纹在承袭明代样式的基础上发展演变,受清代舆服制度等的影响而形成时代风格。清代服饰云纹按造型可归纳为沉稳敦厚型、纤秀流畅型、短圆规则型3大类,这3类云纹有着明显的演变渐进关系;清代服饰云纹按色彩可归纳为五彩云纹、青云纹、金云纹3大类,这3种调式的云纹各自有着较为固定的配色程式;清代服饰云纹在整幅纹样中或充当主纹,或充当辅纹,起着点题、完善情景、丰富寓意等作用。

西安地区3~6岁儿童脚型分类及特征规律分析

针对当前市场童鞋设计不合理和缺乏儿童脚型理论研究参考问题,本研究首先使用三维足部扫描仪获取到3~6岁的52名男童和71名女童三维脚型数据,进行儿童脚型特点和差异的对比分析;其次,采用相关性分析和主成分分析将26组多维指标降维处理至3个主成分:脚长因子、宽围因子和高度因子;然后,以提取的3个主成分作为分类标准进行H-K聚类分析,将儿童脚型分为3类:细瘦足、适中足、肥壮足,其中左脚细瘦足占比最多,右脚适中足占比最多;最后,将脚长尺寸标准化,发现儿童脚型存在显著的性别及左右脚差异.该研究结论可为童鞋设计和鞋楦三维数字化构建提供理论参考.