时空嵌入式网络用户轨迹序列模式挖掘仿真

时空嵌入式网络用户轨迹序列模式挖掘在数据挖掘领域中具有重要意义,针对当前方法存在用户轨迹序列模式挖掘效率低的问题,提出基于差分隐私的网络用户轨迹序列模式挖掘方法,利用自适应方法分析用户轨迹序列的长度分布情况,计算添加或者删除输入序列时的敏感度,选取最优截断长度。查询用户轨迹数据库中的支持度,并计算其轨迹的全局敏感度,通过对全局敏感度的计算可以得到全局敏感度的上界,并且网络用户轨迹数据的最大长度与全局敏感度成正比,根据序列权重之和来降低时间复杂度,利用降低后的时间复杂度等条件计算截断后的用户轨迹序列,可以得到用户轨迹数据库所记录的条数和序列向量,更新向量能够获得最优截断序列。构建前缀序列,利用等价关系对前缀序列判断,最终实现了时空嵌入式网络用户轨迹序列模式的挖掘。实验结果表明,提出方法在对网络用户轨迹模式挖掘时,不仅运行时间短效率高,挖掘过程中数据的查全率较高,数据的完整性好。

时空交错式剧作结构创作特征研究

电影剧作结构，体现剧作家独特的艺术构思，导演依据表现主题、思想内涵运用电影思维和艺术手法，将一系列素材组合成统一整体，使其既满足观众审美需求，又不失自我艺术追求。时空交错式剧作结构突破传统时空起承转合、前因后果等自然秩序，独具匠心地运用多种叙事方式糅合不同时空情节，将多个独立完整的故事融会贯通，别具一格地表现出导演非凡的艺术追求，渗透出导演对人生深厚的哲理思忖。

并行式时空二维融合路段交通量预测

提出了一种基于支持向量机(SVM)的并行式时空二维融合路段交通量预测方法,对时间SVM和空间SVM分别在两个并行的操作系统模型中进行,以此降低时间成本.并将时间维SVM预测、空间维SVM预测与基于SVM的数据时空二维线性融合预测结果进行了对比,通过对比表明,时空二维线性融合预测的误差很明显比其它两种方法预测的结果误差要小得多,因此本文提出的时空二维融合可大大的提高预测精度.尤其是当有突发因素(如:交通事故发生)时,本文所提出的方法可在很大程度上避免一维时间源数据融合的结构性系统误差.

浅谈时空交错式结构在舞蹈创作中的作用

舞蹈结构的设计在舞蹈作品创作进程中是一个不可避免且非常重要的环节,舞蹈结构相当于作品的“骨架”,它的优劣直接决定着作品的整体质量和效果。其中,作为当下流行的舞蹈结构方式——时空交错式结构,由于其本身诸多的独特之处,而备受广大舞蹈创作者们青睐。本文通过研究时空交错式结构的本质与内涵,以及分析作品《刑场上的婚礼》从内容到形式的创作过程,着重探寻时空交错式结构对舞蹈创作的内容构思和形式表达的具体作用。以此,使舞蹈编导更加清晰的认知时空交错式结构的作用指向,从而不断为促进舞蹈创作的发展,提供切实有效的帮助。

浅谈二十一世纪以来内蒙古蒙古语电影的叙事结构

每种艺术都有其自身的结构形式和相应规律。电影是一种结构形式丰富的艺术,内蒙古蒙古语电影的叙事结构一般为因果式线性结构和时空交替式结构两大类。自二十一世纪以来,蒙古语电影把目光转移到草原牧民的现实生活中,反映民族文化心理,创造了不少符合观众审美需求、风格独特的优秀作品。本文主要分析二十一世纪以来的内蒙古蒙古语电影的叙事结构,并对其特点进行概括。

幼儿园全程立体互动式家长工作实践

家长工作是幼儿园管理的重要内容之一,是目前幼儿教育改革实践中比较受关注的问题。如何改变幼儿园家长工作体系,提升其功能,是幼儿教育的重要内容。

李锐小说叙事结构分析

李锐小说作品的叙事结构极有特色,综合来看,大体可分为四种类型,即钟摆式结构、众星拱月式结构、时空交错式结构和多线并置式结构。通过对李锐小说叙事结构的分析,可以更深刻地理解隐藏在文本结构背后的丰富意蕴和深层内涵。

A Hybrid Neural Network for Spatiotemporal Pattern Recognition

A hybrid network is presented for spatio-temporal feature detecting, which is called TS-LM-SOFM. Its top layer is a novel single layer temporal sequence recognizer called TS which can transform sparse temporal sequential pattern into abstract spatial feature representations. The bottom layer of TS-LM-SOFM, a modified self-organizing feature map, is used as a spatial feature detector. A learning matrix connects the two layers. Experiments show that the hybrid network can well capture the spatio-temporal features of input signals.

The Operation Model of Pig Supply Chain Based on Temporal and Spatial Perspectives

This paper constructed pig supply chain based on theoretical study and practical research, then analyzed the operation model of pig supply chain from tem- poral and spatial perspectives. The results showed that from the spatial perspective, pig supply chain had five models of operation, such as vertical integration pig sup- ply chain, quasi-vertical integration pig supply chain （tightly-knit pig supply chain）, semi-tightly pig supply chain, loosely-organized pig supply chain and market-oriented pig supply chain. In contrast, from temporal aspect, pig supply chain experiences the pure market transaction, contract form, cooperatives, vertical integration and hori- zontal integration model of operation; the future pig supply chain model in China might be the longitudinal transverse group alliance pig supply chain, namely, the upper vertical integration or quasi-vertical integration （leading processing enterprise ＋ farmer） and down horizontal integration （leading processing enterprises ＋ logistics company ＋ sales）, and it would be a kind of competition among interest groups by division of cooperation.

Spatial channel pairing-based maximum ratio combining algorithm for cooperative relay networks

To improve the reliable performance of information transmission in cooperative relay networks, the scheme of the max-rate spatial channel pairing （SCP） based on maximum ratio combining （MRC） is proposed. The scheme includes three steps： channel phase cancellation, MRC, and SCP. Eventually, the solution of the scheme is modeled as convex optimization. The objective function of the optimization problem is to maximize the transmission rate and the optimization variable is the strategy of pairing between the uplink spatial sub-channels of each user and the corresponding downlink spatial ones. The theorem of the arrangement inequalities is adopted to obtain the approximate closed-form solution of the optimal pairing for this convex optimization. Simulation results demonstrate that compared to the existing distributed space-time block coding and coherent combined schemes without SCP, the proposed max-rate SCP plus MRC algorithm achieves appreciable improvements in symbol error rate in medium and high signal-to-noise ratio regimes. The achievable performance gain is due to the use of maxrate SCP.

拍给心灵的浪漫诗——林孝谦电影研究

电影作为一种叙事艺术,其风格的表达不仅在于内容的表述,同时也来自于适合其内容的形式表达。作为20世纪90年代以来台湾新生代导演的代表,林孝谦导演的电影呈现出与1980年代台湾新电影运动的大师们不同的题材与形式选择。在他的作品中,一方面更倾向于对人物心灵的向内叩问,弱化了政治意识与批判意识;另一方面,他擅长以台湾民众所熟悉的日常生活为内容,将本土化与国际化的融合作为电影命题,表达出对于台湾在地文化与大陆文化脉络之间关系的追寻。他的电影影像风格与文化气质独特,丰富了台湾电影乃至华语电影的银幕表达。

怎样让小标题一“名”惊人

运用小标题增设文章亮点这种艺术形式,99年中考还“藏在深闺人未识”,2000年也只是星星点点,2001年枝枝红杏出墙来,到2002年仿佛是一夜春风,已成“千树万树梨花开”之势。翻捡着一张张满分试卷,品味着一个个生动活泼的小标题,使人倍感欣慰。遗憾的是部分考生没注意到小标题与文章内容间的关系,也没有注意到小标题彼此间的联系,仅为拟题而拟题。须知,拟定小标题不仅要讲究标题的艺术技巧,更要注意小标题间的内部关系。

LAND USE/COVER CHANGE AND DRIVING FORCES IN SOUTHERN LIAONING PROVINCE SINCE 1950S

Land use/cover change (LUCC) is a key aspect of global environment change, and in a sense indicates the influence of human activities on natural environment. Regional case study is the core of LUCC research. Taking the southern Liaoning Province, a coastal area facing the Bohai Sea and the Huanghai Sea, as an example, supported by ARCVIEW and ARC/INFO, this paper reconstructed LUCC patterns in three periods of 1954, 1976 and 2000, and analyzed their spatial-temporal changes from 1954 to 2000. On the base of these, it also studied the LUCC’s driving mechanism. The results show that the land transformation mainly occurs among cultivated land, forestland and urban and industrial land. Industrialization and urbanization in rural area are the major driving forces for cultivated land change, and the extension of the built-up area in cities is mainly the result of economic development and tertiary industry development, etc., which is at expense of cultivated land.

Analysis on Temporal and Spatial Variation Characteristics of Potential Evapotranspiration in Guizhou Province

[Objective] The aim was to analyze temporal and spatial variation charac- teristics of potential evapotranspiration in Guizhou Province. [Method] According to information from 19 meteorological stations of Guizhou Province from 1960 to 2007, with the formulas of optimizational Penman-Monteith and SEBAL net radiation mod- el, the reference crop evapotranspiration ETo was calculated. Also with the spatial interpolation method of Arcgis 9.3, climate tendency rate statistics, K-M test, wavelet analysis and so on, the related regional differentiation and spatial and temporal change characteristics between meteorological factors from each monitoring station and ETo were analyzed. [Result] The results show that the correlation of potential evapotranspiration and meteorological factors in Guizhou Province demonstrates re- gional differentiation; there was no direct connection between the correlation of po- tential evapotranspiration and meteorological factors and the amount of meteorologi- cal factors in the year; there were 3 cycles in potential evapotranspiration, namely, 1 year, 5 years and 10 years, with 3 mutation points, respectively, in 1965, 1984 and 1999, mainly affected by air temperature, precipitation and solar radiation. [Conclusion] The research is of great significance in developing irrigation approach- es, adjusting agricultural structure and ecological construction.

Spatiotemporal evolution of high-aspect-ratio filamentary trace in sapphire of picosecond pulse burst-mode for laser lift-off

The influence of the picosecond(ps) pulsed burst with a nanosecond scale of temporal separation(50 ns) on filamentary traces in sapphire substrate is investigated. The spatiotemporal evolution of the filamentary plasma string induced by sub-pulses of the burst-mode is revealed according to the analysis of the instantaneous photoluminescence images. Due to the presence of residual plasma, the energy loss of sub-pulse during the balancing of self-focusing effect is reduced, and thus refreshes the plasma via refocusing. The refreshed plasma peak generated by the subsequent subpulse appears at relatively low density positions in the formed filamentary plasma string, which results in more uniform densities and less spatial overlap among the plasma peaks. The continuity and uniformity of the filamentary trace in sapphire are enhanced by the burst-mode. Besides, the burst filamentary propagation can also remain effective when the sub-pulse energy is below the self-focusing threshold. Based on this uniform and precise energy propagation mode, the feasibility of its use for the laser lift-off(LLO) process is verified.

Re-engineering of the forest stand database:case study of Bilahe Forestry Bureau,Inner Mongolia of China

The forest stand database of Bilahe Forestry Bureau, Inner Mongolia of China was taken as an example to demonstrate the whole process of building a temporal geodatabase by means of reengineering. The process was composed of establishing a conceptual data model from the initial database, constructing a logical database by means of mapping, and building a temporal geodatabase with the help of Computer-Aided Software Engineering （CASE） tool and Unified Markup Language （UML）. The results showed that as the reengineered forest stand geodatabase was dynamic, it could easily store the historical data and answer time related questions by Structured Query Language （SQL）, meanwhile, it maintains the integrity of database and eliminates the redundancy.

时空交错式结构在舞蹈创作内容和形式上的价值

设计舞蹈结构是创作舞蹈作品过程中最基础且最重要的一个环节,可谓是舞蹈作品的“骨架”。因而,舞蹈结构设计的优劣在一定程度上影响舞蹈作品的最终质量与呈现效果。时空交错式结构作为一种流行的舞蹈结构,其具备的独特性与艺术性,受到广大舞蹈创作者青睐。文章从分析舞蹈作品中常见的时空交错式结构入手,结合具体舞蹈作品细述时空交错式结构在舞蹈创作内容以及创作形式上的实质价值。以此使舞蹈编导在时空交错式结构应用上,具有更加清晰的认知与方向,不断助推舞蹈创作进一步发展,为舞蹈创作提供坚实基础。

Single-trial EEG-based emotion recognition using temporally regularized common spatial pattern

This study addresses the problem of classifying emotional words based on recorded electroencephalogram （EEG） signals by the single-trial EEG classification technique. Emotional two-character Chinese words are used as experimental materials. Positive words versus neutral words and negative words versus neutral words are classified, respectively, using the induced EEG signals. The method of temporally regularized common spatial patterns （TRCSP） is chosen to extract features from the EEG trials, and then single-trial EEG classification is achieved by linear discriminant analysis. Classification accuracies are between 55% and 65%. The statistical significance of the classification accuracies is confirmed by permutation tests, which shows the successful identification of emotional words and neutral ones, and also the ability to identify emotional words. In addition, 10 out of 15 subjects obtain significant classification accuracy for negative words versus neutral words while only 4 are significant for positive words versus neutral words, which demonstrate that negative emotions are more easily identified.

The community structure and seasonal dynamics of plankton in Bange Lake, northern Tibet, China

The seasonal variations in biomass, abundance, and species composition of plankton in relation to hydrography were studied in the saline Bange Lake, northern Tibet, China. Sampling was carried out between one to three times per month from May 2001 to July 2002. Salinity ranged from 14 to 146. The air and water temperature exhibited a clear seasonal pattern, and mean annual temperatures were approximately 4.8℃ and 7.3℃, respectively. The lowest water temperature occurred in winter from December to March at-2℃ and the highest in June and July at 17.7℃. Forty-one phytoplankton taxa, 21 zooplankton, and 5 benthic or facultative zooplankton were identifi ed. The predominant phytoplankton species were Gloeothece linearis, Oscillatoria tenuis, Gloeocapsa punctata, Ctenocladus circinnatus, Dunaliella salina, and Spirulina major. The predominant zooplankton species included H olophrya actra, Brachionus plicatilis, Daphniopsis tibetana, Cletocamptus dertersi, and A rctodiaptomus salinus. The mean annual total phytoplankton density and biomass for the entire lake were 4.52×10^7 cells/L and 1.60 mg/L, respectively. The annual mean zooplankton abundance was 52, 162, 322, and 57, 144 ind./L, in the three sublakes. The annual mean total zooplankton biomass in Lakes 1–3 was 1.23, 9.98, and 2.13 mg/L, respectively. The annual mean tychoplankton abundances in Bg1, 2, and 3 were 47, 67, and 654 ind./L. The annual mean tychoplankton biomass was 2.36, 0.16, and 2.03 mg/L, respectively. The zooplankton biomass（including tychoplankton） in the lake was 9.11 mg/L. The total number of plankton species in the salt lake was signifi cantly negatively correlated with salinity.