温州水电调度对策的研究

温州电网网络结构相对薄弱,电网建设长期落后于快速的负荷增长;而温州境内水电站在总装机容量中比重较大,较少的几个有蓄水能力的电站水库库容也不大,调峰能力和调峰容量均很有限,水电调度难度较大。针对温州电网水电调度的实际情况,提出了相应对策。     

足部运动受力分布与鞋楦优化分析研究

利用力学模型构建出足底在平跟和提踵状态下受力情况,并分析了足底曲面的横向和纵向曲线的变化趋势, 为鞋楦的优化研究提供依据.其次,通过压力平台和鞋垫压力系统对双脚脚底压力的分布、运动过程中脚底压力、冲量、脚底受力时间的变化进行验证,获得鞋楦生产的基本参数.最后,在企业中进行鞋楦试制取得了较好的应用效果.     

传统瓯绣融入现代服饰的探析

瓯绣是我国传统名绣之一,由于种种原因,非物质文化遗产的瓯绣面临着人散艺绝的危机。为了保护与发展非物质文化遗产的瓯绣,探求瓯绣新的发展之路,以弘扬地方文化,在继承传统瓯绣文化的基础上,探究现代瓯绣服饰的开发和创新,将传统瓯绣艺术融入现代服饰,使之有机地结合。针对瓯绣服饰的丝线固色、绣图与服饰风格的协调统一、绣图的完整、定型与光泽度的保持等技术难点寻求解决的途径。使瓯绣服饰贴近人们的生活,既提高现代服饰的自身价值,又拓宽瓯绣发展的新天地。     

温州市年降水量的权马尔可夫链预测模型

基于降水过程不确定性的特点,利用资料系列的均方差方法把降水序列分为不同的状态。在此基础上,采用统计方法,建立转移概率矩阵,以规范化的各阶自相关系数为权重,并用加权的马尔可夫模型和模糊集理论中的级别特征值预测降水状态和降水量。根据温州市区1955-2004年连续50a的降水资料,用马尔可夫预测模型预测温州市2005-2007的降水状态及年降水量,预测误差分别为1．44％、0．3％、6．3％,满足预报精度,说明该模型应用于温州市区是成功的。     

低剂量长效促性腺激素释放激素激动剂在体外受精-胚胎移植中的应用

目的: 探讨体外受精－胚胎移植(IVF-ET)中长效促性腺激素释放激素激动剂(GnRH-a)降调节的最低有效剂量。方法: 回顾性分析2009年至2010年行体外受精(IVF)/单精子卵胞浆内注射(ICSI)治疗的长方案周期,根据黄体中期注射GnRH-a剂量分<0.6 mg(A组),≥0.6 mg<0.8 mg(B组),≥0.8 mg(C组),每组随机抽取100个周期,比较治疗效果。结果: 三组的移植周期数分别为92个,80个及85个。三组成熟率、受精率、优质胚胎率、自然流产率及宫外孕率差异均无统计学意义(P>0.05)。A组种植率(37.91%)及每移植周期妊娠率(63.04%)均明显高于B组(25.14%及37.5%)和C组(23.16%及 41.18%) (P<0.01),B组和C组相比差异无统计学意义(P>0.05)。C组Gn用量显著高于A组和B组(P<0.01),而启动日LH值及hCG日LH值均明显低于A组和B组(P<0.05)。结论: 使用极低剂量GnRH-a能获得很好的临床结局。     

Semi-online scheduling with machine cost

For most scheduling problems the set of machines is fixed initially and remains unchanged for the duration of the problem.Recently Imreh and Nogaproposed to add the concept of machine cost to scheduling problems and considered the so-called List Model problem.An online algorthm with a competitive ratio 1.618 was given while the lower boud is 4/3.In this paper,two different semi-onlne versions of this problem are studied‘.In the first case,it is assumed that the processing time of the largest job is known a priori.A semi-online algorithm is presented with the competitive ratio at most 1.5309 while the lower bound is 4/3,In the second case,it is assumed that the total processing time of all jobs is known in advance.A semi-online algorithm is presented with the competitive ratio at most 1.414 while the lower bound is 1.161.It is shown that the additional partial available information about the jobs leads to the possibility of constructing a schedule with a smaller competitive ratio than that of online algorithms.     

GIS在光缆线路监测系统中的应用

分析了光缆维护的现状和建立基于G IS的光缆线路监测系统的必要性,提出一种将G IS技术应用于光缆线路监测系统中的设计和实现方法。     

Preparation,structure and thermomechanical properties of nylon-6 nanocomposites with lamella-type and fiber-type sepiolite

Nylon-6 nanocomposites filled with lamella-type and fiber-type sepiolite were prepared by the simple melt-compounding approach and compared with the common nylon-6/montmorillonite (MMT) nanocomposite. Morphology and dispersion state of fillers were observed by scanning and transmission electron microscopy. Wide-angle X-ray diffraction and differential scanning calorimetry analyses were carried out to investigate the crystallization behaviors of nanocomposites. The results suggested that sepiolite facilitates the formation of α-phase crystals of nylon-6, which is quite different from the case observed in MMT-filled nanocomposites. Thermomechanical tests showed that heat distortion temperature and Young’s modulus of sepiolite-filled nanocomposites are obviously improved compared with neat nylon-6. Interestingly, sepiolite-filled nanocomposites exhibited the highest level of reinforcement on the Young’s modulus, which may stem from the more efficient interfacial stress transfer. In addition, tensile fracture morphologies of nanocomposites filled with sepiolite and MMT are also compared.     

The influence of polyphony on the dynamical modelling of musical timbre

This letter addresses the problem of pattern recognition of polyphonic musical timbre. Frame-level dynamics of audio features are particularly difficult to model, although they have been identified as crucial perceptive dimensions of timbre perception. Recent studies seem to indicate that traditional means to model data dynamics, such as delta-coefficients, texture windows or Markov modelling, do not provide any improvement over the best static models for real-world, complex polyphonic textures of several seconds’ length. This contradicts experimental data on the perception of individual instrument notes. This letter describes an experiment to identify the cause of this contradiction. We propose that the difficulty of modelling the dynamics of full songs results either from the complex structure of the temporal succession of notes, or from the vertical polyphonic nature of individual notes. We discriminate between both hypothesis by comparing the performance of static and dynamical algorithms on several specially designed datasets, namely monophonic individual notes, polyphonic individual notes, and polyphonic multiple-note textures. We conclude that the main cause of the difficulty of modelling dynamics of real-world polyphonic musical textures is the polyphonic nature of the data.