浅淡虚拟现实技术在教学中的应用

近些年随着计算机软硬件的迭代更新,虚拟现实技术得到了迅猛发展,并且在教学领域中应用广泛。本文通过分析虚拟现实的现实特征与技术优势,进一步阐述了虚拟现实技术将对未来教学方式带来的革命性变革。     

虚拟现实技术概论

本文概述了虚拟现实技术的概念,技术特征和分类,介绍了虚拟现实技术的应用现状和发展趋势,并做了最后的总结。     

虚拟现实技术在电子商务领域的应用

传统的电商平台只能给人们提供简单的图片和文字信息,却无法给用户提供逼真的视、听、触觉感受;所以把虚拟现实技术引入到电子商务领域有着重要意义。本文着重阐述了相关的理论、主流技术和实际应用,同时论述了网络虚拟现实技术与电子商务相互促进和推动的发展趋势。     

虚拟现实技术应用状况

虚拟现实技术是当今计算机界研究的热点。本文主要从应用的角度对虚拟现实技术进行了综述,介绍了近二十多年来该技术在多个行业典型的应用案例及最近的进展,论述了虚拟现实技术对各行业的影响,最后给出了虚拟现实技术发展的趋势及对我们日常生活的影响。     

谈虚拟现实技术在建筑设计中的应用

虚拟现实或虚拟实境(Virtual Reality),也可简称为VR,也称灵境技术或人工环境,是利用电脑的硬件和软件模拟生成一个三度空间的虚拟世界,给用户提供一个视觉、听觉、触觉等感官的模拟,让用户具有身临其境的效果。本文主要从虚拟现实技术的特点分析入手,列举了国外对虚拟现实技术的应用现状,最后阐述了虚拟技术在建筑设计中的应用效率优势。     

虚拟现实技术在高等农业院校教学方法创新中的应用探索

在信息技术等各种新技术层不出穷的现代社会,高校的教学方法也应该与时俱进,单纯的传统枯燥的板书口述方法已经不能满足学生的需要,为此需要对教学方法进行改革和创新,将现代技术融入其中,以达到更好的教学效果。笔者以此为研究目标,分析了虚拟现实技术在高等农业院校各个研究领域的应用范筹,探讨了在教学中应用虚拟现实技术的具体方法,并根据虚拟现实技术专业性强、使用设备复杂、技术难度高不易被大多数教师掌握使用的特点提出一系列相应的解决方案,为虚拟现实技术在教学方法改革创新的应用中提供了新的思路。     

虚拟现实技术应用于机械设计与制造中的现实意义

随着当前计算机技术及软硬件技术的迅猛发展,经济全球化、设计虚拟化以及交流网络化,已然成为了新世纪人们主要的生活与工作方式。而其中作为计算机尖端应用的虚拟现实技术,不仅为现代化的机械设计与制造带来了全新的技术革命与理念革命,而且也为工业设计师与操作者们提供了更为有效的应用工具。本文结合实际工作经验,从虚拟现实技术的定义与主要内涵出发,并就其应用于机械设计与制造中的现实意义进行了分析与探讨。     

浅谈搭建虚拟现实医疗教育平台的技术思路与实施方案

VR虚拟现实作为一项世界前沿的科学技术,将医疗、教育行业与之结合能够产生巨大的发展空间和社会效益。本文以虚拟现实医疗教育平台为论述载体,着重介绍了平台搭建的技术思路和实施方案,并得出以下结论:利用三维重建技术、眼控交互技术、以及逼真的仪器操作感,以VR眼镜为媒介在医学教育、中小学公益教育等方面的应用,将会产生重大积极影响,既能以一种全新的方式提高医学教育和培训的效率,同时在推广虚拟现实治疗、公益教育项目上具有很大的社会价值和研究意义。     

“虚实结合、系列化功能”的应用电子技术性专业实训基地建设成效分析

按照电子产品设计开发、生产、技术服务流程,采用企业当前主流生产性设备和自主开发的先进虚拟仿真软件,虚拟现实与真实产品生产结合,开发基于真实产品的实训项目教学资源,建成了"虚实结合、系列化功能"的共享型实训基地,满足教学、培训、职业技能鉴定、产品研发与生产四大功能需求。     

虚拟现实技术在军校职业教育中的应用探讨

本文从多媒体技术的深入普及和虚拟现实(Virtual R eality,简称VR)技术的不断发展出发,论述了虚拟现实技术在军校职业教育中的应用,并指出了将来的发展趋势。     

电感耦合等离子-质谱法测定饲料中钠、镁、铬、锰、铁、铜、锌、砷、硒、镉和铅

应用电感耦合等离子-质谱技术(ICP-MS),建立饲料中钠、镁、铬、锰、铁、铜、锌、砷、硒、镉和铅等元素的测定方法。对饲料样品的前处理方法、仪器工作参数和11种元素标准曲线进行优化;并以加标回收、分析方法比对和重复测试说明方法的准确性和精密性。方法在0～1 000 ng/ml范围内线性良好,仪器检出限为0.557 7～5.072 ng/ml,具有良好的精密度,其回收率在88.1%～104.4%之间,相对标准偏差小于5.0%。同时与原子吸收和原子荧光方法进行比对,测定结果相近。所建立的方法简单、快速,可替代原子吸收和原子荧光方法测定饲料中的11种金属元素,为饲料的质量控制提供理想的元素分析方法。     

Supplementation of broodmares with copper, zinc, iron, manganese, cobalt, iodine, and selenium

In experiment 1, 6 pregnant mares received a concentrate that contained a trace mineral premix that provided 14.3 mg Cu, 40 mg Zn, 28 mg Fe, 28 mg Mn, 0.08 mg Co, 0.16 mg I, and 0.16 mg Se/kg concentrate (group A). Seven mares received the same concentrate plus 502 mg Zn and 127 mg Cu once daily (group B). No differences (P > .05) in foal growth data, or Cu, Zn, and Fe concentrations of mare milk, mare serum, or foal serum were observed. In experiment 2, 6 pregnant mares received the same concentrate as group A (group C), and 8 mares received the same concentrate fortified with 4× the trace mineral premix (group D). Group C mares had higher serum Zn concentration at 1 day (P < 0.01) and 56 days (P < 0.04). Group C mares had higher milk Fe concentration at 28 days (P < .01), and group D mares had higher milk Cu concentration at 56 days (P < .01). Group C foals had higher serum Cu concentration at 14 days (P < .03). The results from this study provide no evidence to indicate that supplementing late gestating and lactating mares with higher dietary trace mineral levels than those recommended currently by NRC has any influence on foal growth and development, or on the Cu, Zn, and Fe concentrations of the mare milk, mare serum, or foal serum.     

Comparisons of Angus, Charolais, Galloway, Hereford, Longhorn, Nellore, Piedmontese, Salers, and Shorthorn breeds for weight, weight adjusted for condition score, height, and condition score of cows

Breed differences for weight (CW), height (CH), and condition score (CS) were estimated from records (n = 12,188) of 2- to 6-yr-old cows (n = 744) from Cycle IV of the U.S. Meat Animal Research Center's Germplasm Evaluation (GPE) Program. Cows were produced from mating Angus and Hereford dams to Angus, Hereford, Charolais, Shorthorn, Galloway, Longhorn, Nellore, Piedmontese, and Salers sires. Samples of Angus and Hereford sires were 1) reference sires born from 1962 through 1970 and 2) 1980s sires born in 1980 through 1987. The mixed model included cow age, season of measurement and their interactions, year of birth, pregnancy-lactation code (PL), and breedgroup as fixed effects for CW and CS. Analyses of weight adjusted for condition score included CS as a linear covariate. The model for CH excluded PL. Random effects were additive genetic and permanent environmental effects associated with the cow. Differences among breed groups were significant (P < 0.05) for all traits and were maintained through maturity with few interchanges in ranking. The order of F1 cows for weight was as follows: Charolais (506 to 635 kg for different ages), Shorthorn and Salers, reciprocal Hereford-Angus (HA) with 1980s sires, Nellore, HA with reference sires, Galloway, Piedmontese, and Longhorn (412 to 525 kg for different ages). Order for height was as follows: Nellore (136 to 140 cm), Charolais, Shorthorn, Salers, HA with 1980s sires, Piedmontese, Longhorn, Galloway and HA with reference sires (126 to 128 cm). Hereford and Angus cows with reference sires were generally lighter than those with 1980s sires. In general, breed differences for height followed those for weight except that F1 Nellore cows were tallest, which may in part be due to Bos taurus-Bos indicus heterosis for size.     

文山黄牛的现状与保种措施

文章阐述了文山黄牛的品种特性、现状和保种措施。文山牛保种可采用原产地活体保种,迁地活体保种和现代生物技术保种等多种方式。文山牛体型较大,性情温顺,产肉性能好、活动敏捷、结构紧凑、肌肉强健、肉品质优良、耐粗饲、适应性广、繁殖力和抗病力均较强等特点。文山牛是云南省一个地方良种,种质资源保护刻不容缓。     

液相色谱-串联质谱法测定动物尿液中11种β-受体激动剂残留量的不确定度评估

采用液相色谱-串联质谱法测定动物尿液中11种β-受体激动剂残留量,对标准溶液、体积、质谱峰面积、浓缩过程及回收率等测定不确定度因素进行了分析,通过评定各不确定度分量及标准不确定度,得出11种β-受体激动剂的扩展不确定度在0.7 ～ 1.1 ng/mL范围内.由各因素对合成不确定度的贡献比分析可知,影响较大的因素为试验回收率及标准溶液浓度.