共查询到20条相似文献,搜索用时 78 毫秒
1.
2.
3.
4.
《化工管理》2019,(21)
经济的发展离不开石油企业的发展,在如今的工业发展中石油起到了举足轻重的作用。但是随着石油开采的不断深入,石油存储量的不断较小,石油开采的难度越来越大。目前,石油开采也发展到了三次采油,微生物吞吐采油技术是一种三次采油的方法,能在很大程度上提高原油采收率。我国微生物采油技术得到了快速发展,一些微生物采油技术成果已经应用到多个油田中,但仍存着一些问题,需要进一步改进。文章简述了微生物吞吐采油技术的概念和特点,并对国内外微生物吞吐采油技术的发展现状进行了探讨,最后对我国微生物吞吐采油技术发展应用方面的不足进行了分析,期望为我国未来的微生物采油技术的发展提供一定的借鉴意义。 相似文献
5.
6.
在乡镇供水水处理技术中,液氯作为相对古老的氯化法消毒药剂,主要作用为消除水中能够致病的微生物,管控水体中微生物的繁衍,从而预防由于饮水导致疾病的出现。但液氯本身是具有强烈毒副作用的化学物品,因此在保存、运送以及应用等过程中危险性较高,在管控方案方面标准比较严格。次氯酸钠作为液氯消毒的替代物,消杀效果相对接近,使用方便,而在运送与应用期间的安全系数更高。随着城镇化程度的增加以及居民安全环保观念的提升,以次氯酸钠取代液氯已然形成水处理业界共识,演变为一种必然趋势。基于此,文章对次氯酸钠消毒系统及其自控改造与应用进行分析。 相似文献
7.
8.
9.
随着我国科学技术的不断发展,微生物检验技术也有了不断地提升,已经由过去单一的检验技术手段转化为多种检验技术措施并存的局面,尤其是信息技术的应用大大提高了微生物检验的质量,为制药企业的生产提供了坚强的保障。本文主要通过分析微生物检验技术存在的重要性,阐述目前我国微生物检验技术的现状以及未来发展趋势。 相似文献
10.
根据我国羽绒服装相关标准规定,需要对羽绒服装中的微生物检测指标进行严格的要求和规定,羽绒服装中的微生物检测需要根据实际检测的目的进行分析,并结合好检测的实际工作,以便提高规范检测流程,提高检测质量.本文就羽绒服装中微生物检测的要点以及微生物检测操作的重要进行分析研究,通过对羽绒服装中微生物检测的实验来探讨检测的准确性以及科学性,从而为服装领域中微生物检测技术的应用提供借鉴. 相似文献
11.
《Telecommunications Policy》2014,38(10):914-932
This article analyzes the engagement of Japanese, Korean and Chinese participants in the development of Internet standards at IETF on the basis of four quantitative metrics: attendance, patenting, authorship and leadership. The results are strikingly divergent. Japanese involvement in Internet standardization began early and Japan was, for many years, second only to the U.S. in terms of IETF participation. Though Japanese participation has declined since the early 2000s, Japan remains a major contributor to IETF standardization. Korean involvement in IETF has always been significant, but below the levels of Japan and major European countries. Korean participation in IETF has also declined over the past decade, and has been dominated by one firm, Samsung. Though meaningful Chinese involvement in IETF did not begin until the mid-2000s, it has rapidly expanded in recent years. Today, China is a major player in numerous areas of Internet standardization in terms of three metrics (participation, patenting and leadership), and is rapidly gaining in terms of document authorship as well. Most of China׳s recent IETF involvement can be attributed to Huawei, though other Chinese firms have recently begun to increase their participation in the organization. Thus, contrary to some views that China׳s engagement with standardization is primarily one of indigenous innovation and “catching up”, China׳s experience with IETF demonstrates deliberate and effective engagement with a major Western standards-development organization on its own terms. 相似文献
12.
This paper explores the idea that a sense of school subject image is a necessary feature of curriculum management and a potent force for change. The discussion centres on the view that all school subjects have an image and that if those intimately involved with the subject do not control the image then someone else does! In such circumstances the image is the product of past encounters and old euphemisms and is unlikely to hold the changed realities.The UK developments in Design and Technology education (the term Design and Technology is used to denote the school subject defined under this heading by the UK National Curriculum, 1995) have created something of an image problem which has interesting international parallels. Some of these problems are due to clearly discernible internal tensions and an ambiguous relationship with other subject areas.Through greater attention to subject image internal controversies might be acknowledged and resolved, relationships with other subject areas can be more meaningfully understood and practitioners can be helped to make sense of curriculum change. 相似文献
13.
李江 《石油化工技术经济》2011,27(1)
研究了石油化工企业的燕汽计量情况,着重对蒸汽热量计量的合理性进行了分析,阐述了蒸汽热量计量的依据及计算方法,以及蒸气热量计量对节能降耗的重要意义. 相似文献
14.
中国的旗袍文化蕴含着非常丰富的文化内涵和设计思想,如今旗袍的普及受到一定的限制,只有经过改良,才可变局限性为可行性,才可使旗袍焕发青春,走向新时代。 相似文献
15.
17.
宰微 《石油化工技术经济》2005,21(3):21-25
从2004年初以来,国际油价急剧攀升,文章分析了原油价格居高不下的原因,对未来油价的走势及其对我国经济的影响和冲击进行了预测,面对这种情况我国必须采取应对措施:树立节能消费理念;促进技术创新,推动产业升级;建立石油战略储备、推出原油期货、推动多元化战略等。 相似文献
18.
纤维素纤维是自然界广泛分布的天然纤维,像法桐球果纤维、木棉纤维、杨花纤维、蒲公英绒纤维,都是纤维素纤维,纤维具有吸油快、吸油量大、拒水的性能特点,纤维不易进行纺织生产加工,但可以作为海面吸油材料使用,并且加工方法简单,吸油效果好。 相似文献
19.
More and more systems need to be squeezed together in frequency, space and time in order to satisfy the growth in demand for radio services. However, greater proximity increases the risk of service breakdowns caused both by poor interference tolerance in receivers and by inappropriate signals radiated by transmitters. 相似文献
20.
George S. Ford 《Telecommunications Policy》2011,35(3):213-219
Broadband Internet service to widely held to be a significant contributor to economic development and global competitiveness, and comparison of adoption rates across countries are common. This paper presents evidence that the relative broadband Internet adoption ranks across the Organisation for Economic Co-Operation and Development (“OECD”) countries are converging to the wireline telephone adoption ranks in the mid 1990s. This was a time when wireline telephone service had reached maturity, but before consumers began to abandon traditional telephone services for mobile services and Internet telephone technologies. As such, in the absence of better data on household adoption, wireline telephone rank is a useful proxy for a country's ultimate fixed-line broadband penetration rank. Having such an educated guess available regarding broadband rank should reduce the amount of anxiety over rankings, since similar rankings across the two services implies suitable broadband performance. Large departures, alternately, may be a cause for concern or delight. Like prior analyses, the findings suggest that the adoption of communications services is largely an economic and demographic issue. 相似文献