图书馆整架工作的自动化实现

随着开架借阅的实行,流通书库错架现象日益严重,这一问题深深困扰着图书管理人员,针对这一情况,本文提出设计一种辅助整架的机器,以减轻管理员整理书架的劳动强度,提高工作效率,并介绍了具体的思路及实现方法。     

Authorware课件的菜单制作

在Authorware中，通常用下拉式菜单响应制作菜单。这种方法直观、简捷，仅限于制作菜单栏上的单级子菜单。调用UCD函数可制作出用户所需的各种菜单，但相关研究甚少。为此，给出一些UCD菜单函数的基本格式、功能及其应用。     

Modeling Large Carnivore and Ranch Attribute Effects on Livestock Predation and Nonlethal Losses

Predator-livestock interactions are a major concern for both agriculture and conservation globally. Using retrospective survey data from 274 ranches in Wyoming, United States, we used information theory to model how ranch attributes and large carnivores influenced the timing, duration, and severity of livestock predation. We then used constrained ordination to understand how 1) landscape, weather, and animal features influence predation and 2) how livestock behavior and nonlethal loss relate to ranch attributes and large carnivores. Timing, duration, and severity of livestock predation were generally not explained by ranch size or number of counties but were explained by livestock type, livestock parturition (either timing or duration), and documented large carnivore loss. Addition of the large carnivore loss variable to global models always improved Akaike information criterion scores. Rangelands characterized as rough, forested, shrubby, or a public grazing allotment reportedly increased predation risk, in part, due to large carnivore exposure. Approximately two-thirds of participants noticed livestock nervousness if a predator was nearby, half of participants noted changes in livestock distribution patterns, and a quarter of participants noted a reduction in livestock grazing time. Nonlethal losses such as lower weight gains, lower conception rates, lower birth rates, and delayed birth season were reported by 27%, 19%, 12%, and 11% of participants, respectively. Ordination revealed separation between behavioral changes and nonlethal losses, attributed to large carnivore exposure. Parturition relative to livestock type was also strongly correlated to timing and duration of predation for cattle-only operations but not for operations with sheep. The predictive cattle predation-parturition model suggests that for each additional month of calving, producers should anticipate 21 additional d of predation. Understanding predator-livestock interactions relative to ranch and rangeland features, parturition, large carnivore exposure, and losses that extend beyond mortalities can assist in developing novel strategies to mitigate lethal and nonlethal losses.     

全过程基于MATLAB的直流电机调速系统快速设计

直流电机调速系统是典型的闭环控制系统，是机电控制的典型课题。本文提出一种基于MATLAB的快速高效的控制系统开发方法，克服传统的控制系统设计周期长、效率低的缺点。将MATLAB多个工具箱巧妙结合应用，实现全过程基于MATLAB的直流电机调速系统的快速设计。应用MATLAB中的System Identification工具箱实现直流电机的数学建模，应用Simulink对控制系统进行仿真，应用Simulink Design Optimization工具箱实现PID参数的自动寻优，应用RTW技术免去繁琐的编程过程，实现代码自动生成，将生成的代码下载至DSP目标板，完成整个控制系统设计。相对传统的设计方法，该方法具有高效、快速和方便调整等特点，对其他控制系统设计具有一定的借鉴意义。     

甘蔗黑穗病流行学参数和病情指数调查与分析系统开发

根据甘蔗黑穗病流行学参数和病情指数调查与分析中遇到的困难,提出了利用条形码自动识别系统来管理调查过程中的数据,并利用专门开发的计算机分析系统来分析这些数据。调查系统主要包括用户登录界面、条码扫描界面、数据输入界面等三大部分;分析系统具有最短潜伏期(LP)、发病持续期(SSD)、最终累计茎感染率(ISmax)、最终累计丛感染率(IPmax)和病害进展曲线下面积(AUDPC)的计算和抗性等级自动划分等功能。实践表明,此系统有效的提高了工作效率,并有助于减少人工记录和分析过程中的失误率。     

基于ArcGIS数据驱动页面与Python脚本语言的专题图批量出图技术研究

针对目前ArcGIS数据驱动页面批量出图格式单一,无法完全满足实际的定制需要等问题,利用ArcGIS中的Python脚本语言中的ArcPy库结合数据驱动页面以生成MXD文档(ArcMap地图文档)的方式,实现了专题图的批量自动化处理,其优势在于能够提供自带坐标信息的JPG、PDF等多种格式的专题图导出,并能根据定制需要灵活设计,文中介绍了该研究方法技术流程和ArcPy.mapping工具,以及批量出图的代码实现和操作流程。     

二维码在植物病虫害标本制作中的应用

随着移动信息技术的发展,二维码技术应用广泛。本文概述了植物病虫害标本的种类、作用与二维码的特点,介绍了植物病虫害标本二维码标签制作的步骤,分析了二维码技术应用于植物病虫害标本制作的优势,以期更简单、便捷地为人们提供详尽的植物病虫害信息。     

Evolution and Development of a Code for Private Native Forestry in New South Wales,Australia

Until recently the focus of forestry regulations in New South Wales (NSW) was on public rather than private lands. This paper describes the process of developing legislation to control where and how private native forestry takes place. To date, the lead agency in attempting to formulate a clear policy has been the Department of Natural Resources. First, through a series of committee meetings of representatives of key stakeholder groups, a draft private native forestry code was devised and was released for public comment. After a period of intense negative reaction from both those in favour of continuing timber production in native forests and those in favour of requiring that private lands be managed as nature reserves, the draft code was withdrawn and a government-appointed committee then began again the process of drawing up a code acceptable to most stakeholders.