鉴定古陶瓷的专家系统

本文论述了一个鉴定古陶瓷的专家系统（简称ESAPP）。给出了鉴定古陶瓷的方法-“特征提取法”，研究了各种可信度的计算公式，提出了一种新的不确定性推理方法及其相应算法，该系统不仅可对古陶瓷的真伪进行鉴定，而且能对古陶瓷的具体年代和生产窑址作出正确的推理。     

陶艺灯具的黑白文化

面对竞争日趋激烈的陶艺灯具市场,设计师要善于把握独特的陶艺灯具设计风格,并以此作为重点竞争手段,才能赢得消费者市场。从黑白色韵味的陶艺灯具造型中,归纳总结黑白文化所特有的视觉对于营造独特陶艺灯具造型设计风格的决定意义,分别从明度对比、轻重对比、性格对比、文化对比、空间对比、阴阳对比、词义对比、历史性与未来性对比八个方面分别阐述黑白文化陶艺灯具视觉构成的特有魅力。     

广西钦州坭兴陶文化特征

广西钦州坭兴陶是中国"四大名陶"之一,其制陶工艺历史悠久,坭兴陶的土质洁净细腻、制作工艺精湛,在烧制过程中还可以产生丰富的色彩变化,形成稀有独特的"窑变"效果,这种效果的陶制品非常珍贵,被称作"窑宝"。广西钦州坭兴陶独特的民族文化装饰图案赋予了它独特的地域特征,凝聚了钦州陶艺师们智慧结晶和艺术表现力,为钦州的文化产业做出突出的贡献。     

基于Leap Motion 的虚拟现实陶艺体验系统

针对陶瓷工艺制作条件严苛导致普及受局限的问题，研发一套基于Leap Motion 的虚拟现实陶艺体验系统，使用户得以脱离物理条件限制、以裸手交互的方式，简单直接地进 行陶瓷制作工艺体验。在结构方面，将陶器划分为顶部、侧面、底面3 部分，其中侧面结构基 于简单均匀广义圆柱体，并利用高斯函数进行形变的约束控制；在交互方面，参考真实陶艺场 景，依据陶器结构特性设计用户友好的手势动作和操作范围，并结合动作捕捉和虚拟现实技术， 在保证陶器形变可控性的同时，提升系统体验的真实感和沉浸感。设计对比实验和陶器模型 偏差值计算方法，量化证明系统可控性和体验的优越性。以沉浸感、完成度、操易度、趣味 性4 项作为调查问卷评估指标进行统计分析，验证系统良好的用户体验。     

浅析陶瓷设计

中国的陶瓷艺术历史悠久,各个朝代的陶瓷精品令人流连忘返。可是近百年来,中国的陶瓷艺术是每况愈下,而长期以来小农经济的体制,师徒承传的规律所导致的人们单凭直觉和经验来设计的习惯正是这种情况重要原因之一。到底何为陶瓷设计?陶瓷设计在陶瓷艺术中到底有多重要的价值?该怎样进行陶瓷设计?常见的设计方法有那些?     

A low-power inverter-based Σ△ analog-to-digital converter for audio applications

This paper presents a design for a low-power,high-resolution audio Σ△ analog-to-digital converter(ADC)based on a novel gain-boost class-C inverter.The gain-boost class-C inverter behaves as a sub-threshold amplifier,thereby minimizing power dissipation.The proposed ADC chip is fabricated in a SMIC 65-nm CMOS process with a die area of 0.63 mm2.With 1.2 V of supply voltage,the ADC chip achieves a peak signal-tonoise-plus-distortion-ratio(SNDR)of 92 dB and a dynamic range(DR)of 97 dB over the 20 kHz audio band,consuming only 1.13 mW.These results make the ADC particularly suitable for portable electronics applications.     

史前陶器形状的数字化研究

文物形状研究是考古学的重要内容,传统的手工测量和绘制方法是粗略、不精确的,且易造成文物损伤。随着计算机图形学、图像处理等学科的发展以及二维、三维数据获取设备的普及,传统文物研究手段和方法正在发生深刻的变革。该文以美洲印地安陶器定量化研究为例,描述了文物的三维数字化方法,分析了数字化文物的几何造型中基于球面和柱面组合投影的参数化方法,分析了对称性的定量化研究中实际的对称性计算时应解决问题的方法,讨论了数字化研究在考古学中的重要作用。     

坭兴陶外观设计工艺的独特性

作为驰名中外的四大名陶之一,钦州坭兴陶具有十分悠久的历史。而且其地域特色也十分的显著。坭兴陶具有十分独特的装饰手法、产品种类、独特的工艺流程以及造型．所以受到了人们的普遍喜爱。因此,必须要对坭兴陶设计文化进行充分的挖掘和发展．从而全面的促进这门传统工艺的不断发展。对之进行继承和发扬。文章针对坭兴陶独特的外观设计进行了分析和探讨．供大家参考。     

论当代艺术视角下陶瓷书法对传统书法的借鉴与革新

传统书法与陶瓷书法都是中国传统艺术中的重要门类,融合了我国民族文化的独特内涵和精神面貌。纵观中国美术发展史,陶瓷书法始终没有完全脱离传统书法的影响和渗透,文章分别就其审美、气韵、意趣等角度谈陶瓷书法艺术与传统书法艺术的关联,旨在探索如何在当代艺术视角下创作出无愧于时代的艺术精品。     

Can one see the infinite future of the universe when falling to Kerr and Reissner-Nordstr?m black holes?

We analyze the falling time of massless and massive particles to a black hole, using timelike and null geodesics for spaces described by the Kerr and Reissner-Nordstr?m metrics. It is shown that an observer falling to a black hole horizon will see only a finite future of the external universe. The formula obtained can be used in assessing the difference in arrival time of photons and massive particles from Kerr and Reissner-Nordstr?m black holes to an observer on Earth.     

Short contributions

Studies of ERS-1 synthetic aperture radar (SAR) imagery have shown that fire scars in Alaskan forests are significantly brighter (3–6 dB) than surrounding unburned forest. The signature varies seasonally and changes as vegetation re-establishes on the site over longer time periods (>5years). Additionally, it is known that soil water content typically increases following forest fires due to changes in evapotranspiration rates and melting of the permafrost.

The objective of this study was to understand the relation between soil water content and the ERS-1 SAR signature at fire-disturbed sites. To accomplish this objective, we compared soil water in six burned black spruce (Picea mariana (Mill.) B.S.P.) forest sites in interior Alaska to ERS-1 SAR backscalter measurements. The six sites are of various age since burn. Soil water was periodically measured at each site during the summer of 1992 and at one site in 1993 and 1994 when the ERS-1 imaging radar was scheduled to pass overhead. Results indicate that a positive linear relation exists between soil water content and the SAR backscatter coefficient in young burns ( < ～4years). Older burns do not show this relation, a result of vegetation establishment following the burn. This interaction between soil moisture condition and ERS-1 SAR backscatter shows great potential for measuring soil water content and monitoring seasonal variations in soil water content in black spruce sites recently disturbed by wildfire.     

彩陶纹样装饰手法略探

从中国有彩陶之初,装饰和器物就紧密联系,形成了独特的彩陶文化风格。彩陶运用图案符号进行艺术创作,图案构成的装饰手法具有相当规模的表现力,除了生活中的具体形象以外,一切抽象的形象也都成了彩陶图案造型的基本手段。图案由点、线、面要素构成,运用多样的形式美原则和色彩的视觉心理,结合材料、工艺、技术及功能等方面进行创意,创造出中华民族所特有的彩陶纹样及图案,是我国文化艺术中的瑰宝,民族设计的灵魂。     

Assessing spatial and temporal variations in surface soil moisture in fire-disturbed black spruce forests in Interior Alaska using spaceborne synthetic aperture radar imagery — Implications for post-fire tree recruitment

Recent studies [Bourgeau-Chavez, L.L., Kasischke, E.S., Riordan, K., Brunzell, S.M., Nolan, M., Hyer, E.J., Slawski, J.J., Medvecz, M., Walters, T., and Ames, S. (in press). Remote monitoring of spatial and temporal surface soil moisture in fire disturbed boreal forest ecosystems with ERS SAR imagery. Int. J. Rem. Sens.] demonstrated that ERS SAR imagery can be used to estimate surface soil moisture in recently burned black spruce forests in interior Alaska. We used this relationship to analyze the intra- and inter-annual variations surface soil moisture in two burned black spruce forests in Alaska. The results of this study showed distinct seasonal and longer-term trends in soil moisture in the two sites, with the site that burned in 1994 having higher soil moisture than the site that burned in 1999. The differences in soil moisture between the sites were related to landscape-scale variations in soil drainage and seasonal permafrost thawing. Finally, we found that the 1999 site had dramatically lower levels of tree recruitment (both aspen and black spruce) than the 1994 site as a result of the lower soil moisture levels. These results show that the ERS SAR and similar systems can be used to monitor a site characteristic that is important to understanding changes in the ecosystem community structure that result from variations in climate and the fire regime in the boreal region.     

A gesture-free geometric approach for mid-air expression of design intent in 3D virtual pottery

The advent of depth cameras has enabled mid-air interactions for shape modeling with bare hands. Typically, these interactions employ a finite set of pre-defined hand gestures to allow users to specify modeling operations in virtual space. However, human interactions in real world shaping processes (such as pottery or sculpting) are complex, iterative, and continuous. In this paper, we show that the expression of user intent in shaping processes can be derived from the geometry of contact between the hand and the manipulated object. Specifically, we describe the design and evaluation of a geometric interaction technique for bare-hand mid-air virtual pottery. We model the shaping of a pot as a gradual and progressive convergence of the pot’s profile to the shape of the user’s hand represented as a point-cloud (PCL). Thus, a user does not need to learn, know, or remember any gestures to interact with our system. Our choice of pottery simplifies the geometric representation, allowing us to systematically study how users use their hands and fingers to express the intent of deformation during a shaping process. Our evaluations demonstrate that it is possible to enable users to express their intent for shape deformation without the need for a fixed set of gestures for clutching and deforming a shape.     

Analysis of response‐time compensation for black‐frame insertion

Abstract— An impulsive driving technique has been widely adopted for the elimination of motion blur in LCDs. Although the problem of slow temporal response time is very well known for LCDs, the inherent motion blur of moving objects in hold‐type displays has a more‐serious impact on display performance. It is well known that even very fast LCDs with zero response time still suffer from the motion‐blur artifact due to hold‐type driving effects. However, a fast temporal response is also critical in order to maximize the blur‐reduction effect even in the case of impulsive driving. In this paper, the special behavior of LC molecules in an impulsive driving environment has been analyzed especially for the case of black‐frame insertion, and we propose an effective means to implement optimized response‐time compensation (RTC) for the black‐frame insertion technique.     

A black hole novelty detector for video analysis

A black hole is a region of space that has so much mass concentrated in it that there is no way training data for a nearby object to escape its gravitational pull. In this paper we are inspired by this phenomenon to create a new form of novelty detector. We consider the of a given class as a black hole. For multi-class data we are dealing with multiple black holes. A test point is pulled by the centroids of different black holes as well as its K nearest neighbours. The gravitational pull is modelled as an iterative process, where the forces acting on a point are constantly changing with time as the test point moves in multi-dimensional space corresponding to these forces. Once the algorithm has converged, a thresholding scheme is applied to determine whether the test point has been pulled within the boundary of the black hole or not. Any points that lie outside all known black holes are deemed to be novel. We compare this novelty detector with other well-known models of novelty detection on a video analysis application and show very promising results.     

浅议原始思维在原始装饰图形形式上的体现

文章分别从彩陶发生以及纹样的演变、装饰图形的抽象化和原始装饰图形意蕴的象征性三个方面来阐述原始思维在原始装饰图形形式上的体现,指出原始人类的装饰图形创造过程本身就是一个思维认识的过程,这个过程是在不断的时间和认识的反复循环中发展和丰富起来的。     

基于多源信息融合的架空输电线路覆冰预测模型研究

输电线路严重覆冰可能会导致输电线路的机械和电气性能急剧下降,威胁电力系统安全、稳定运行。线路覆冰预测技术是电网防冰、抗冰领域难点之一。本文以电网输电线路自然覆冰监测大数据为基础,进行数据异常处理、缺失值填补等预处理,提出一种基于覆冰拉力浮动区间的区间准确率评测方法。研究基于新型深度学习的数据驱动输电线路覆冰预测技术,构建了融合历史监测拉力、微气象数据及未来天气预报的拉力时序、一阶差分拉力时序覆冰预测模型,实现覆冰监测终端未来24小时逐小时的拉力准确预测,提前预知输电线路是否覆冰以及覆冰程度,有助于防冰、融冰决策,保证电力系统稳定安全运行。     

ProTEK PSB coating as an alternative polymeric protection mask for KOH bulk etching of silicon

The utilization of a newly developed photosensitive polymeric coating, ProTEK PSB plays a significant role in realizing simple process steps in the fabrication of MEMS devices using bulk micromachining technology. The photosensitive coating which serves as an alternative to the conventional silicon nitride mask of bulk potassium hydroxide (KOH) etching in devising MEMS devices, particularly in suspended microcantilever structure, is reported in this study. Although the polymeric coating ProTEK PSB acts as an excellent outer protective layer from any pinhole issues, the coating’s lateral etching in the KOH solution is dominant, which results in an undercut problem. Therefore, few investigations have been carried out to identify the most suitable condition for the ProTEK PSB deposition on Si substrate. Initial investigation was done on the effect of Si surface modification on the stability of the ProTEK PSB in KOH etching. It was observed that the surface treatment may reduce the undercut ratio for a short period of KOH etching. However, for the extended hours, the surface treatment is not effective enough to improve the stability of the polymeric coating. Therefore, combinations of ProTEK PSB on three substrates were studied in order to obtain a minimum undercut to etch depth ratio of the polymeric coating in KOH bulk etching. The study showed that the combination of ProTEK PSB patterned on thermal oxide results in the most effective etching condition attributed by minimum undercut ratio. Further investigation was carried out on the effect of the KOH etching concentration on the stability of the ProTEK PSB coating over the long hours of bulk etching process. Three concentrations of KOH etchants, KOH 20 wt%, KOH 45 wt% and KOH with isopropyl alcohol (KOH + IPA) were investigated. The results showed that the stability of the polymeric coating was excellent in KOH 20 wt% concentration with a very minimal undercut ratio of 0.05–0.07. In conclusion, the utilization of the polymeric coating ProTEK PSB serves as an alternative etch mask in KOH wet etching which offers simpler and cheaper device fabrication in bulk micromachining technology.     

On particle collisions near rotating black holes

Scattering of particles with different masses and energy in the gravitational field of rotating black holes is considered both outside and inside the black hole. Expressions for scattering energy of particles in the center-of-mass reference frame are obtained. It is shown that the scattering energy of particles in this frame can acquire very large values not only for extremal black holes but also for nonextremal ones if one takes into account multiple scattering. Numerical estimates for the time needed for a particle to get ultrarelativistic energy are given.