设计模式在基于J2EE的分布式ERP系统中的应用

设计模式提供了设计不同系统、不同应用时经常发生的问题的解决方案,向编程人员提供特定问题的可依据的方法。本文描述了几个经典设计模式,MVC、Facade和BusinessDelegate,并在开发某药业公司的基于J2EE的分布式ERP系统中应用这些模式。     

Classic and novel brominated flame retardants (BFRs) in common sole (Solea solea L.) from main nursery zones along the French coasts

Brominated flame retardants (BFRs) were investigated in juvenile common sole from nursery zones situated along the French coast in 2007, 2008 and 2009. Extensive identification was performed with regard to PBDEs, novel BFRs 1,2-bis(2,4,6-tribromophenoxy)ethane (BTBPE) and decabromodiphenylethane (DBDPE), and other non-PBDE BFRs, namely, hexabromobenzene (HBB) and 2,2′,4,4′,5,5′-hexabromobiphenyl (BB-153). Polybrominated diphenyl ether (PBDE) concentrations (Σ 14 congeners) ranged from 0.01 ng/g to 0.16 ng/g wet weight (ww) in muscle, and 0.07 ng/g to 2.8 ng/g ww in liver. Concentrations were in the lower range of those reported in the literature in other European locations. Lower PBDE concentrations, condition indices and lipid contents were observed in the Seine estuary in 2009, possibly in relation to a lower water flow. The PBDE patterns and ratios we observed suggested that juvenile sole have a relative high metabolic degradation capacity. Non-PBDE BFRs were detected at lower levels than PBDEs, i.e., within the < method detection limit - 0.005 ng/g ww range in muscle, and < method detection limit - 0.2 ng/g ww range in liver. The data obtained is of particular interest for the future monitoring of these compounds in the environment.     

发展中的角色转换--上海居住板块变迁及其对城市空间形态演化的影响

居住板块的变迁作为城市居住空间发展的主要表现之一，对城市整体空间形态的演化起到了举足轻重的作用。而上海居住板块的变迁既显示出上海与其它城市共有的特点，而更突出的却是它的个性表现。文中主要回顾了1990年代以来上海居住板块变迁的主要历程及其在城市空间形态演化中的角色转换，并简要分析了促成这一发展和转换过程的动力所在。从中我们可以清楚地看到居住在当前城市发展中扮演着越呆越重要的角色。     

网络化和拼贴:拯救乡土村落生命之顺德马岗案例

在我国快速城市化进程中和新农村建设高潮来临之际,城市边缘村落和中国广袤大地上的众多村落景观,正面临着前所未有的冲击.尽管有为数不多的古老村落被认定为历史文化名村而得到较好的保护,但大量的一般性传统村落则面临毁灭性的冲击.同时,在城市扩张过程中原居民被迁居到全新的社区中.这种对乡土景观和本土居民的忽视,带来众多严重的社会文化和生态问题.马岗正是一个典型案例.本研究提出了城市边缘村落城市化建设的另一个模式.景观规划师将马岗村作为一个具有历史的生命机体.这一有机系统不应该在城市化过程中被彻底铲平,而应该保持其生命的整体性,并融入到新城市规划之中.同时,马岗的乡土文化遗产不应成为城市化过程的障碍,而应该被看作形成新城社区文化归属感和社会认同感的积极因素,为新社区提供社会草根体系,并提供休闲旅游的机会.     

区域空间规划生态分级保护研究 ——以华蓥山东麓为例

生态分级保护是空间规划中重要支 撑性内容,是全面协调生态保护与开发利用 关系,实现各类空间差异化管控,促进区域 可持续发展的重要途径。本文以华蓥山东麓 为例,通过生态功能重要性和生态敏感性评 价,同时结合景观生态安全格局进行分析, 构建生态保护分级指数模型,按保护程度由 高至低将研究区划分为Ⅰ、Ⅱ、Ⅲ、Ⅳ级。其 中,I级保护区为基本生态控制区,实行严格 的生态保护制度;II级保护区为生态缓冲区, 实行生态修复与城乡建设、产业发展负面清 单管理制度;III级保护区为农业生态区,加 强农业生态环境保护,建立健全绿色生态农 业导向机制;IV级保护区主要为城镇村庄生 态区,加强城乡居民点环境保护,推进人居 环境建设。研究结果可为华蓥山东麓生态修 复保护总体规划提供借鉴,对华蓥山自然保 护区与城镇建设区之间生态过渡地带的精细 化、精准化、差别化管理具有重要意义。     

MRI and CT image indexing and retrieval using local mesh peak valley edge patterns

In this paper, a new pattern based feature, local mesh peak valley edge pattern (LMePVEP) is proposed for biomedical image indexing and retrieval. The standard LBP extracts the gray scale relationship between the center pixel and its surrounding neighbors in an image. Whereas the proposed method extracts the gray scale relationship among the neighbors for a given center pixel in an image. The relations among the neighbors are peak/valley edges which are obtained by performing the first-order derivative. The performance of the proposed method (LMePVEP) is tested by conducting two experiments on two benchmark biomedical databases. Further, it is mentioned that the databases used for experiments are OASIS−MRI database which is the magnetic resonance imaging (MRI) database and VIA/I–ELCAP-CT database which includes region of interest computer tomography (CT) images. The results after being investigated show a significant improvement in terms average retrieval precision (ARP) and average retrieval rate (ARR) as compared to LBP and LBP variant features.     

Multilinear Weighted Regression (MWE) with Neural Networks for trend prediction

The ability to define accurate linear models to find patterns or relationships between variables is one of the most challenging fields in Computer Science. In particular, extrapolative applications are widely used to predict values in Biological, Behavioral and Social Sciences. Analysts usually focus on reducing the approximation error in order to ensure fairly reliable predictions. Using pattern detection models such as Multilayer Artificial Neural Networks can offer good results in predicting possible outcomes, however they might not be the optimal fit for predicting evolutionary trends due to their inherent overfitting characteristics. Regression models, on the other hand are more often used to predict trending behaviors and therefore they can be more helpful when studying the evolution of a given instrument, symbol or series. However, a simple regression model can be very inaccurate with an unacceptable prediction error rate. This paper shows an automatic method to find trends in known instruments, by using a massive linear regression technique combined with a conventional machine learning proposal that works on optimizing the weights of the linear regressive structures. In this paper the authors show an application of the model in finance (stocks market instruments), however the proposal is designed to work for to any discipline that studies the trends of any evolutionary object.     

校企合作"互利共赢",搭建轻化类专业人才培养模式新平台

校企合作是高等职业教育培养高素质技能型人才的重要途径,结合轻化类专业教学改革实践,探讨了校企合作互利共赢模式的具体方法和效果,阐述了对校企合作人才培养模式实践的认识和思考.     

多尺度时空PM 2.5 分布特征、影响要素、方法演进的综述及 城市规划展望

精细化治理空气污染正成为改善城 市品质的重点方向,对城市多尺度PM 2.5 时 空格局与影响要素的梳理有助于从研究和 实践层面加强规划设计对公共健康的积极 影响。本文从全国、城市、社区层面较全面 地阐述了不同时空尺度下PM 2.5 的时空格局 特征,总结了土地格局、交通网络、建成环 境、蓝绿空间等不同影响因素与城市空气中 PM 2.5 的相互关联耦合作用。同时,本文分析了不同的研究方法在精细化污染治理中的应用,指出人工智能方法在高精度尺度下的时空复 杂特征融合分析中的优势。最后,结合现有的城市PM 2.5 治理经验,对精细化目标下分时分区 的城市规划提出展望：基于提升精确度的新技术方法,优化城市空间结构,构建精细化分时 分区管理策略。