辽宁省春玉米区主要病虫害综合防治技术体系的建立、发展与展望

综述了辽宁省玉米区主要病虫害综合防治技术体系的发展过程,介绍了不同发展时期玉米病虫害的综合防治策略和模式,评述了各时期综合防治技术体系的特点,认为辽宁省春玉米区的综合防治技术体系经济有效、实用性强,与社会发展环境相协调;并针对当前玉米生产上出现的次要病虫害与原来被控制的病虫害上升为主要病虫害,病虫害加生重,病虫害灾变异常爆发时缺乏有效的应急防治措施等问题,从玉米生产可持续发展的角度,提出了加强主要病虫害长期预警技术研究,增强自然控制力量,监测病原菌生理分化和潜在危险性病虫害发展动态的治理对策。     

SOLIDWORKS 2015:CAD应用模式的探索与创新

正2013年9月23日,达索系统发布了SOLIDWORKS 2014;2014年1月27日,在美国SOLIDWORKS World 2014上,SOLIDWORKS发布了中期软件更新,2014年9月24日,SOLIDWORKS 2015如期在中国正式发布。几乎是去年的同一个时间,2014年9月24日,达索系统在北京正式发布最新版本的SOLIDWORKS 2015。"随着用户的业务发展,他们对设计的需求也日益提高。我们一直都秉     

宁夏南部山区秸秆覆盖对春玉米水分利用及产量的影响

为研究秸秆覆盖在宁南山区对春玉米生长及其土壤水分的影响,在宁夏彭阳县对三种不同秸秆覆盖处理方式进行了试验研究。对比分析了不同覆盖措施下春玉米的生长状况、产量及水分利用效率变化的关系。结果表明:采用秸秆覆盖方式可使春玉米的株高、穗位高、穗长、生物产量及经济产量等指标得到显著提高,土壤的蓄水保墒性能增强,水分利用效率提高,增产增效明显;与传统方式相比,整秸秆覆盖可使春玉米的产量及水分利用效率分别提高3.5%及16.5%。     

砂姜黑土上氮钾配施对粮菜轮作中产量与品质的影响

连续3年在甘蓝套玉米—甘蓝轮作制中进行增施钾肥定位试验,研究结果表明:钾肥对甘蓝玉米产量有显著的增产作用,对甘蓝的品质也有明显的改善,并随年限的增加钾肥对产量、Vc和糖含量效应进一步增大,施钾对春甘蓝的产量影响高于冬甘蓝。在同N水平下,产量有随钾用量的增加而增加趋势。连续2年施钾的后效对玉米产量增长极显著。施用钾肥可大幅度增加的总产值,氮钾配施肥料的产投比达3.27～4.56,其中处理N2K1高达4.56。综合分析表明:钾肥对粮菜轮作制中的产量和品质影响大于氮肥、在实际施肥中以高钾中氮为最佳。     

立足HR——爱克森斯确定中国市场开拓策略

在美国拥有超过十五年软件开发经验的AXESS(爱克森斯国际科技有限公司),在中国却选择从鱼龙混杂的HR市场切入,其目的和优势何在呢?9月下旬,AXESS中国区总经理周宁给出了答案。周宁认为综合来看,中国HR的市场还是有一定的容量,从竞争方面来讲,虽然比较充分,但是没有哪一个厂商已经确立了领导地位。这种市场特点恰恰又是AXESS的优势所在。“HR软件的需求是多样化的,各个企业的需求根据企业的规模和内部管理的流程存在比较大的区别,在这种情况下,客户会有比较多的定制化需求,必然会涉及到二次开发过程,而我们不论在开发能力还是开发速…     

聚焦大数据安全

9月下旬,2014中国互联网安全大会(ISC 2014)在北京召开.本届大会吸引了包括首任美国国土安全部部长汤姆里奇、计算机病毒之父弗雷德科恩,以及中国工程院院士邬贺铨、公安部网络安全保卫局总工程师郭启全等数百位国内外顶级信息安全专家出席. 大会聚焦大数据背景下的信息安全所面临的全新挑战和问题,深入探讨了智慧城市、互联网金融、数字医疗、可穿戴计算等业界关心的问题.邬贺铨院士表示,万物互联将会是未来的趋势.不仅手机、电脑、电视机等传统信息化设备将连入网络,家用电器和工厂设备、基础设施等也将逐步成为互联网的端点.     

松嫩平原玉米带土壤水分利用率研究

通过对自1995-1998年4年的田间及微区试验结果进行总结统计,阐述了松嫩平原春玉米带土壤水分利用率的变化特性及其相应的影响因素,阐述了气候、种植方式、管理水平、土壤肥力及区域与品种类型间对玉米带水分利用率的影响趋势及特性,以期对这一区域的玉米种植提供指导性参考依据。     

华为发布数字轨道2.0解决方案建立更美好的全联接轨道

正德国柏林2014年9月25日电/美通社/--全球领先的信息与通信解决方案供应商华为,9月23日至26日以"A Better Connected Raillway"为主题在柏林参展InnoTrans 2014,重磅发布数字轨道2.0解决方案,致力于以创新的数字轨道ICT解决方案帮助轨道交通行业建立更美好的全联接轨道。创新ICT建立更美好的全联接轨道城市化和全球化趋势下,陆上运输需求剧增。如何基于既有路网基础设施,实现运力最大化,构建差异化竞争     

解读第二代防火墙标准

GA/T1177-2014《信息安全技术第二代防火墙安全技术要求》(以下简称"新标准")是我国首部关于第二代防火墙的标准,由于其内容与国际接轨,并全面考虑了国内用户对第二代防火墙的安全防护需求,它能够为用户提供指导性的选购建议,帮助国内行业用户选择满足自身业务安全需求的防火墙,这对于规范我国的网络安全防护具有重大意义。新标准自2014年9月1日实施以来备受业内关注。为此,在公安部网络安全保卫科局、公安部科技信息化局、公安部第三研究所     

IFA 2014前瞻：互联融合 智能世界

高水平展商需求驱动积极发展;IFA为行业发展提供市场动力;2014全球市场将取得更多成功;创建新的会议模式＂IFA＋峰会＂2014年柏林国际消费电子展（IFA2014）将于9月5-10日在柏林国际展览中心举行,作为全球领先的消费电子和家用电器贸易展览会,展会主办单位——德国消费电子协会（GFU）和柏林国际展览有限公司表示,     

Only connect: teaching, technology and telesis

Abstract This paper describes an approach to the design of interactive multimedia materials being developed in a European Community project. The developmental process is seen as a dialogue between technologists and teachers. This dialogue is often problematic because of the differences in training, experience and culture between them. Conditions needed for fruitful dialogue are described and the generic model for learning design used in the project is explained.     

European Community policy and the market

Abstract This paper starts with some reflections on the policy considerations and priorities which are shaping European Commission (EC) research programmes. Then it attempts to position the current projects which seek to capitalise on information and communications technologies for learning in relation to these priorities and the apparent realities of the marketplace. It concludes that while there are grounds to be optimistic about the contribution EC programmes can make to the efficiency and standard of education and training, they are still too technology driven.     

一种自适应子融合集成多分类器方法

融合集成方法已经广泛应用在模式识别领域,然而一些基分类器实时性能稳定性较差,导致多分类器融合性能差,针对上述问题本文提出了一种新的基于多分类器的子融合集成分类器系统。该方法考虑在度量层融合层次之上通过对各类基多分类器进行动态选择,票数最多的类别作为融合系统中对特征向量识别的类别,构成一种新的自适应子融合集成分类器方法。实验表明,该方法比传统的分类器以及分类融合方法识别准确率明显更高,具有更好的鲁棒性。     

Avoiding semantic and temporal gaps in developing software intensive systems

Development of software intensive systems (systems) in practice involves a series of self-contained phases for the lifecycle of a system. Semantic and temporal gaps, which occur among phases and among developer disciplines within and across phases, hinder the ongoing development of a system because of the interdependencies among phases and among disciplines. Such gaps are magnified among systems that are developed at different times by different development teams, which may limit reuse of artifacts of systems development and interoperability among the systems. This article discusses such gaps and a systems development process for avoiding them.     

Designing economic np control charts: A programmed simulation approach

This paper presents control charts models and the necessary simulation software for the location of economic values of the control parameters. The simulation program is written in FORTRAN, requires only 10K of main storage, and can run on most mini and micro computers. Two models are presented - one describes the process when it is operating at full capacity and the other when the process is operating under capacity. The models allow the product quality to deteriorate to a further level before an existing out-of-control state is detected, and they can also be used in situations where no prior knowledge exists of the out-of-control causes and the resulting proportion defectives.     

The development of robot art

Going through a few examples of robot artists who are recognized worldwide, we try to analyze the deepest meaning of what is called “robot art” and the related art field definition. We also try to highlight its well-marked borders, such as kinetic sculptures, kinetic art, cyber art, and cyberpunk. A brief excursion into the importance of the context, the message, and its semiotics is also provided, case by case, together with a few hints on the history of this discipline in the light of an artistic perspective. Therefore, the aim of this article is to try to summarize the main characteristics that might classify robot art as a unique and innovative discipline, and to track down some of the principles by which a robotic artifact can or cannot be considered an art piece in terms of social, cultural, and strictly artistic interest. This work was presented in part at the 13th International Symposium on Artificial Life and Robotics, Oita, Japan, January 31–February 2, 2008     

Explanation and prediction: an architecture for default and abductive reasoning

Although there are many arguments that logic is an appropriate tool for artificial intelligence, there has been a perceived problem with the monotonicity of classical logic. This paper elaborates on the idea that reasoning should be viewed as theory formation where logic tells us the consequences of our assumptions. The two activities of predicting what is expected to be true and explaining observations are considered in a simple theory formation framework. Properties of each activity are discussed, along with a number of proposals as to what should be predicted or accepted as reasonable explanations. An architecture is proposed to combine explanation and prediction into one coherent framework. Algorithms used to implement the system as well as examples from a running implementation are given.     

Three Process Perspectives: Organizations, Teams, and People

This paper provides the author's personal views and perspectives on software process improvement. Starting with his first work on technology assessment in IBM over 20 years ago, Watts Humphrey describes the process improvement work he has been directly involved in. This includes the development of the early process assessment methods, the original design of the CMM, and the introduction of the Personal Software Process (PSP)^SM and Team Software Process (TSP){^SM}. In addition to describing the original motivation for this work, the author also reviews many of the problems he and his associates encountered and why they solved them the way they did. He also comments on the outstanding issues and likely directions for future work. Finally, this work has built on the experiences and contributions of many people. Mr. Humphrey only describes work that he was personally involved in and he names many of the key contributors. However, so many people have been involved in this work that a full list of the important participants would be impractical.     

基于复小波噪声方差显著修正的SAR图像去噪

提出了一种基于复小波域统计建模与噪声方差估计显著性修正相结合的合成孔径雷达(Synthetic Aperture Radar,SAR)图像斑点噪声滤波方法。该方法首先通过对数变换将乘性噪声模型转化为加性噪声模型,然后对变换后的图像进行双树复小波变换(Dualtree Complex Wavelet Transform,DCWT),并对复数小波系数的统计分布进行建模。在此先验分布的基础上,通过运用贝叶斯估计方法从含噪系数中恢复原始系数,达到滤除噪声的目的。实验结果表明该方法在去除噪声的同时保留了图像的细节信息,取得了很好的降噪效果。     

How do children do mathematics with LOGO?

Abstract  This paper considers some results of a study designed to investigate the kinds of mathematical activity undertaken by children (aged between 8 and 11) as they learned to program in LOGO. A model of learning modes is proposed, which attempts to describe the ways in which children used and acquired understanding of the programming/mathematical concepts involved. The remainder of the paper is concerned with discussing the validity and limitations of the model, and its implications for further research and curriculum development.