从销钉起家的“正业电子”

本文介绍了参观“正业电子有限公司”的概况。     

Bioactive Ca-P scaffolds used for bone reconstruction

1　INTRODUCTIONSkeletalreconstructionorregenerationisre quiredincasesinvolvinglargedefectscreatedbytu morresection ,trauma ,andskeletalabnormalities .Graftsandflapsofautogenoustissuearetwoofthemostsuccessfulmeansofreconstructionbecausetheyallowthetransplantationofbonecontainingbioactivemolecules,livecells ,andfrequently ,avascularsup plythatallowthetransplanttosurviveandremodeleveninhostileradiatedenvironments .However ,onlyaminimalamountoftissuecanbeharvestedforauto grafts,anditisverydiff…     

微波技术提取高脱乙酰度高黏度壳聚糖的实验研究

壳聚糖作为一种具有独特性能的天然高分子生物材料，其应用越来越广泛，并且对壳聚糖品质的要求也越来越高。高脱乙酰度和高黏度是壳聚糖的二个重要质量指标，传统制备工艺中，通过提高反应温度和延长反应时间，能得到高脱乙酰度的壳聚糖产品，但由于过长的反应时间使黏度大大降低。本文采用微波技术和传统工艺相结合，通过正交试验确定了从虾壳中提取高脱乙酰度高黏度壳聚糖的较优工艺条件。     

Digital narrative conventions in heritage trail mobile apps

ABSTRACT

Galleries, libraries, archives and museums (GLAMs) are increasingly using digital technologies for storytelling and creating mobile applications (apps) for cultural heritage content, but how apps are used in practice to communicate information to users has not been widely studied. A team of people from a heritage organisation, a university, and mobile app development group plan to create a bespoke heritage trail app for Ireland, but to date design conventions/recommendations for this genre are lacking. This article applies a systematic approach to digital narrative content analysis to better understand how apps are being used specifically for heritage trails with the aim of identifying what the common features are, which modalities and narrative techniques are used. The selected corpus included 55 apps downloaded from the Google Play Store. The results of this content analysis—based on the App Walkthrough Method (Light, B., Burgess, J., & Duguay, S. (2018). The walkthrough method: An approach to the study of apps. New Media & Society, 20(3), 881–900)—show that there is a gap between academic research themes/trends and how digital narrative is actually being communicated in the current market, and it aims to inform the future development of heritage trail apps by including a list of design and content features common to this genre.     

论程序设计“非结构化→结构化→对象化”技术进步与教育创新

In this paper,the programs' control structures are understood and re-understood,the program-design's “non-structured→structured→objectized(i, e. object-oriented)” are back-looked and known back,the program-design's education is evaluated ,the distinctions and relations of the isomorphic nature and isomorphic representation of both an algorithm and its programs are researched and studied. Then, the creative new education ideas and new teachingreform countermeasures of“ the objectized conformity and isomorphized structured program-design” and “isomorphization of objectized program-design” are advanced.     

面向21世纪的经济实体--网络联盟企业

网络联盟企业是21世纪的崭新的经济实体。文章介绍了网络联盟企业的时代背景、概念、与传统企业间的区别、特点、组建、环境建设以及应用范例。     

扫描器布置方式对智能雷扫描轨迹的影响

为了在不改变智能雷子雷本体结构的情况下扩大其扫描面积,进而增大攻击范围,提出了一种新型扫描器布置方式.先应用高等动力学原理建立所需的坐标系,并为获得飞行扫描轨迹,推导出子雷飞行的六自由度弹道方程.然后通过空间解析几何方法获得子雷扫描器在地面的扫描轨迹方程.采用四阶龙格-库塔算法,将数学模型转换为可仿真的离散模型,并利用Matlab进行计算机仿真.最后将新型扫描器布置方式得到的扫描轨迹与传统的布置方式得到的轨迹进行对比.结果表明,新轨迹扫描圆的横向幅度和对目标的捕获概率更大,新型扫描器布置方式能够增大智能雷攻击范围.     

珠海凤凰山东南角花岗岩孤石空间分布特征及其对步道工程的影响

近年来,珠海市大力发展城市休闲廊道,山地步道沿线花岗岩孤石问题突出,准确探明步道沿线孤石的空间分布规律尤为重要。以凤凰山山地步道沿线区域为例,通过资料收集、地面调查和综合分析,对花岗岩孤石的地表和地下空间分布规律进行研究。结果表明,区内花岗岩孤石较发育,其分布具有一定规律性。在此基础上,进一步分析花岗岩孤石分布对步道工程的影响,提出相应的防治措施,为类似工程建设提供借鉴。     

开展技术创新 推动企业节能

文章介绍了山东铝业公司电解铝厂“九五”期间一方面通过开展技术创新活动,引进,开发和推广节能“四新”技术,一方面走技术改造之路,节能降耗取得了显著成效。     

Estimating urban trail traffic: Methods for existing and proposed trails

The paper presents findings from the most comprehensive, continuous trail monitoring system in the United States, a network of 30 infrared monitors on five multiuse trails in Indianapolis, Indiana operating for periods of one to more than four years. We describe variation in traffic across different trails and segments of individual trails and present traffic ratios that describe variations in traffic by month, day of week, and time of day. We also present regression models for estimating traffic from temporal, weather, socio-demographic, and urban form variables. We propose and validate procedures for use of traffic ratios to extrapolate hourly counts to annual estimates and use of regression models to estimate traffic. Our procedures provide estimates within 20–30% of actual counts. Limitations of the models are noted. Potential applications range from forecasting traffic on proposed new trails to assessing the need for safety improvements such as stop lights at intersections.