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由于科学技术水平的提升,计算机技术、航空航天、网络技术和探测技术迅速发展,在测绘领域得到广泛应用.地质测绘技术随之发生了划时代的变革,特别是测量仪器的自动化、智能化及计算机、卫星定位体系、遥感体系及地理信息体系的应用,使测绘技术跨上了一个崭新的台阶.测绘新技术在地质调查中的应用范围越来越广,并占据了重要的、核心的位置.在地质工程测绘中采用测绘新技术是大势所趋,是科学技术发展的必然结果.本文着重对全球定位系统技术、遥感测绘技术、地理信息系统技术等测绘新技术与传统的测绘技术进行对照分析,对地质测绘中测绘新技术的应用进行简要阐述,说明在地质工程测量中应用测绘新技术的积极作用. 相似文献
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电磁频谱管理的智能化,就是针对电磁频谱管理中涉及到的政策制定、频谱共用、频率自动选择、频谱参数审核、环境监测、设备检测、频管数据存储与信息处理、通信、用频设备的控制等方面,应用智慧地球、感知中国的理念和新技术,提高电磁频谱管理的智能化水平.新技术在电磁频谱管理中的应用,主要体现在以下五个方面. 相似文献
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新技术是科技信息,对这种信息的生产、流通、利用的科学,由于电子计算机的出现,开始形成一种新的经济学,叫做信息经济学(infor mation Econo mics),它是信息科学(information Science)的组成部分,对发展国民经济有很大作用。本文从信息经济学的观点,着重探讨奶牛业重大信息的应用并提出一些建议。 1.通过杂交和选育,奶牛头数和奶牛品 相似文献
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以推动畜牧业发展为目标,探讨动物防疫工作中新技术的应用。首先阐述新技术在动物防疫中的应用价值,了解大力引进与运用新技术的必要性。其次分析动物防疫工作要点,确定应用新技术的关键点。最后提出了定期组织培训加强新技术应用水平、加大动物防疫新技术宣传力度、不断引进动物防疫新技术、在强制动物免疫基础上增加资金投入四点建议,使新技术的作用能够在动物防疫的实践操作中得到体现,旨在实现动物防疫工作信息化。 相似文献
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Tripathy DN 《Animal health research reviews / Conference of Research Workers in Animal Diseases》2004,5(2):263-266
The regular use of live or killed vaccines against infectious agents has remarkably improved the efficiency of poultry production. In some cases eradication of disease has been possible when the pathogen is antigenically stable and confined to a certain geographical area. In other instances monovalent or polyvalent live or killed vaccines have been effective in reducing mortality and morbidity. Many conventional vaccines are developed by trial and error and basic information about their genetic make-up is not known. While the poultry industry has benefited from the regular use of conventional vaccines, there is need for a new generation of effective vaccines that require minimal handling of birds during administration. Using molecular techniques, it is possible to identify the genes associated with virulence and protection. In genetically engineered vaccines, genes that encode protective antigens can be expressed in bacterial or viral vectors. In this regard, avianpox virus vectors appear to be promising for the generation of polyvalent vaccines expressing antigens from multiple pathogens. 相似文献
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甘肃省草地蝗虫预测预报专家系统的研究与开发 总被引:3,自引:3,他引:3
为使甘肃省草地蝗虫Acridoidea的防治工作有目标、有计划、有重点的进行,利用DET平台和网页工具开发了以数据库、模型库和知识库为基本内容,预测预报为主要功能的"甘肃省草地蝗虫预测预报专家系统",将多年来草地保护专家积累的知识、经验和技术,以文本、图形和视频等多媒体信息集成的方式展示于用户,可进行蝗虫的分类检索,预测蝗虫未来发生动态,并选择适宜的防治时期和技术.该专家系统对发挥甘肃省畜牧业优势具有重要的意义. 相似文献
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3S技术的广泛应用及信息技术的迅速发展,为草原火灾信息的获取、管理等技术的发展提供了技术支撑条件。我国自20世纪80年代开始应用遥感技术获取草原火灾信息,加快了草原火信息管理技术的发展,到90年代草原火灾信息获取、管理技术的研究进一步深入,并直接服务于生产实践。 相似文献
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Role of neutralizing antibodies in PRRSV protective immunity 总被引:17,自引:0,他引:17
Little has been known about the components of the immune system that are effective in the protection of a pig against PRRSV infection. Although antibodies were initially perceived as a deleterious, ineffective component of the PRRSV-specific immune response, neutralizing antibodies (NA) are now considered to be an important correlate of protective immunity against PRRSV. This paper reviews the current knowledge on arterivirus-specific NA, the role that NA have in protection against infection with PRRSV, as well as the viral molecular structures that are responsible for the production of this type of antibodies by the pig. This information should prove central to the design of new generation vaccines against PRRSV. 相似文献
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普通光学显微镜检测精液存在主观性、可变性、分析的精子数量少和与受精能力相关性差等缺点。近些年来,一些新的技术用于检测精子,可以更加细致地评价精子的特性。荧光染色技术可以用于评价精子的特殊性质和功能,包括质膜完整性、获能状态和顶体状态。联合使用荧光染料,可以同时检测精子几种功能特点。流式细胞仪可以在短时间内分析大量的经荧光标记的精子。计算机辅助精子分析系统可以提供精子活力和形态学上客观的和详细的信息。通过检测精子与透明带或者输卵管上皮附着、精子穿透卵母细胞,可以获得精子受精能力的信息。未来的研究方向仍是寻找有效的预测精子受精能力的参数。 相似文献
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A variety of immunologic techniques have been introduced during the past few years. Many of these techniques are being applied to clinical specimens in an attempt to help the practicing veterinarian make a diagnosis. The introduction of new techniques requires extensive testing with clinically normal and diseased patients. It is essential for the practicing veterinarian to understand that the techniques available for the detection of immunologic disorders in the dog and cat are not routine diagnostic procedures and that adequate information has not been developed for any of the techniques described to assure the clinical significance of either positive or negative results (Table 3). This should not discourage the practitioner from submitting samples, but should encourage him or her to question the significance of those results and to attempt to correlate them with history and clinical signs before arriving at a final diagnosis. 相似文献
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P N Olson 《Veterinary Clinics of North America: Small Animal Practice》1991,21(3):591-608
There are various causes for azoospermia and aspermia in dogs. Unfortunately, even when the site and cause of infertility are determined, reversing the disorder may be difficult. As new information are gathered on the maturation of canine spermatozoa, testicular immunity, microsurgical techniques for anastomosing occluded ducts, and the physiologic control of testicular and ejaculatory function, however, new therapies might be developed to prevent or reverse azoospermia and aspermia. 相似文献