A hierarchical dense deformable model for 3D face reconstruction from skull

3D face reconstruction from skull has been investigated deeply by computer scientists in the past two decades because it is important for identification. The dominant methods construct 3D face from the soft tissue thickness measured at a set of landmarks on skull. The quantity and position of the landmarks are very vital for 3D face reconstruction, but there is no uniform standard for the selection of the landmarks. Additionally, the acquirement of the landmarks on skull is difficult without manual assistance. In this paper, an automatic 3D face reconstruction method based on a hierarchical dense deformable model is proposed. To construct the model, the skull and face samples are acquired by CT scanner and represented as dense triangle mesh. Then a non-rigid dense mesh registration algorithm is presented to align all the samples in point-to-point correspondence. Based on the aligned samples, a global deformable model is constructed, and three local models are constructed from the segmented patches of the eye, nose and mouth. For a given skull, the globe and local deformable models are iteratively matched with it, and the reconstructed facial surface is obtained by fusing the globe and local reconstruction results. To validate the presented method, a measurement in the coefficient domain of a face deformable model is defined. The experimental results indicate that the proposed method has good performance for 3D face reconstruction from skull.     

Effect of enhanced coagulation by KMnO(4) on the fouling of ultrafiltration membranes

Pre-coagulation enhanced by KMnO(4) before ultrafiltration (KCUF) was compared with normal pre-coagulation by alum (CUF) in the ultrafiltration of water from the Songhua River, China. The trans-membrane pressure (TMP) with KCUF was much lower than that when alum alone was used. With KCUF a slower increment of TMP occurred, even under conditions of high river water turbidity. The results also showed that the removal of COD, UV(254) and TOC was appreciably higher after adding 0.5mg/L KMnO(4) compared with CUF. Although assimilable organic carbon (AOC) was increased by permanganate treatment, the AOC of the permeate from KCUF was nearly the same as that from CUF, showing that the cake layer on the surface of KCUF membrane could adsorb small molecules more effectively than that of CUF. This result was confirmed by the apparent molecular weight (MW) distribution measured by size exclusion chromatography (SEC). It was shown that flocs formed by KMnO(4) and alum were larger than those formed only by alum, causing higher removal of flocs and higher permeation flux. Lower NOM was found in the permeate from the KCUF systems because oxidation and adsorption of organic matter on the flocs occurred. The membrane was partly clogged by organic matter or other materials including some small flocs.     

基于模糊决策的风力发电产业评价研究

根据风力发电技术产业的特点,构建改进层次分析与模糊一致矩阵相结合的方案决策数学模型,该模型既可以减少确定判断矩阵的盲目性,又可以避开评价体系中各等级间的隶属度确定问题,使评价结果更加可靠,适合于信息尚不完整、受主观因素影响较强的评价。实例验证了这一模型的合理性、可行性和有效性,具有实用价值。     

淄博市节水灌溉模式调查及效益分析

以淄博市典型的大田喷灌、果树微灌、蔬菜滴灌工程为对象,与传统地面畦灌进行了对比试验。对已建节水灌溉工程经济效益进行了抽样调查,得到了与试验结果类似的结论。山区、丘陵区喷灌工程的节水效果、增产效果及节电效果都明显优于平原区,表明喷灌工程在山区、丘陵区更具有推广价值。     

水利工程管理单位职工队伍建设的思考与对策

2011年中央1号文件的出台为水利事业的发展提供了重大机遇,水利职工队伍的培育、建设和发展是水利事业发展的基本前提和重要保障。通过对江苏省属水利工程管理单位的职工队伍建设存在的问题展开剖析,在查找原因的基础上,提出发挥政策的＂水井效应＂、创新环境＂放水养鱼＂等建议,从体制机制、培养培训等方面提出加强职工队伍建设的对策。     

节水型社会建设与用水效率控制

在综合分析区域水资源特点、水资源承载能力、用水水平与效率及产业结构调整和水价等影响因素的基础上,提出了工业、农业和生活等方面的节水潜力.以提高水资源利用效率和效益为核心,根据我国不同地区的自然特点、水资源条件、经济社会发展和生态环境保护及其对水资源高效利用的要求,研究提出全国节水型社会建设的目标与任务,确定了不同区域用水效率控制红线,制定了全国节水战略与布局,提出了工业、农业和城镇生活等重点领域节水对策措施.按照量水而行、以水定发展的原则,因地制宜确定不同区域节水型社会建设的重点和方向.     

西南干旱地区城市水系规划研究——以昆明高新产业基地为例

针对西南干旱地区干湿分明,雨季单点暴雨强度大,旱季水资源不足,地形坡度大等特点,以昆明高新产业基地开发建设为例,运用斑块-廊道-基质模式理论以及集聚间有离析最优格局理论,对区域现状水系进行梳理及改造,结合水系功能的转变,构建与城市发展相适宜的防洪与景观体系。通过对河道、池塘特征的系统分析研究,确定了水系的生态需水量。根据生态需水量的研究成果,提出了利用上游水库、区域内库塘蓄水及城市再生水等满足生态需水要求的措施,保证旱季生态需水要求,满足水系生态系统在不同时期的完整性。     

不同填料曝气生物滤池启动挂膜试验研究

不同填料曝气生物滤池在相同条件下进行挂膜试验。进水流向为上流式,挂膜方式为复合接种挂膜,即先用活性污泥闷曝接种,然后逐步提高进水流速,直到滤料表面形成稳定的生物膜。结果表明:33 d后挂膜成功,在温度为16～24℃,水力停留时间(HRT)为1 h,DO为6 mg/L的情况下,陶粒BAF对CODMn和NH3—N的去除率分别为23%和80%;沸石BAF的去除率分别为27%和84%;组合填料BAF去除效果最好,去除率分别为32%和92%。     

神经网络模型在预测BAF出水水质中的应用

采用BP神经网络模型对沈阳仙女河污水处理厂曝气生物滤池出水水质进行预测,将运行数据分为训练样本和测试样本,对神经网络模型的预测值和实测值进行t检验发现两者之间无显著差异,结果表明,神经网络模型可以对BAF处理系统的出水水质预测及运行管理提供参考。     

Robust video hashing based on representative-dispersive frames

This study proposes a robust video hashing for video copy detection.The proposed method,which is based on representative-dispersive frames(R-D frames),can reveal the global and local information of a video.In this method,a video is represented as a graph with frames as vertices.A similarity measure is proposed to calculate the weights between edges.To select R-D frames,the adjacency matrix of the generated graph is constructed,and the adjacency number of each vertex is calculated,and then some vertices that represent the R-D frames of the video are selected.To reveal the temporal and spatial information of the video,all R-D frames are scanned to constitute an image called video tomography image,the fourth-order cumulant of which is calculated to generate a hash sequence that can inherently describe the corresponding video.Experimental results show that the proposed video hashing is resistant to geometric attacks on frames and channel impairments on transmission.