共查询到20条相似文献，搜索用时 62 毫秒
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目的 探讨与评价调节灵敏度参数与青少年近视进展的相关性.方法 对53名近视学生按近视不同阶段分组:初发近视Ⅰ组14名、进展性近视Ⅱ组23名、稳定性近视Ⅲ组16名,采用±2.0Ds反转拍进行一分钟调节灵敏度值测定,并将结果进行相关统计分析.结果 Ⅰ组、Ⅲ组间调节灵敏度存在显著性差异(P<0.05);Ⅱ组、Ⅲ组间调节灵敏度存在显著性差异(P<0.05);Ⅰ组、Ⅱ组间差异不明显(P0.05).结论 在近视发展过程的不同阶段中,初发近视、进展性近视显示低调节灵敏度值,与稳定性近视的调节灵敏度值之间存在显著性差异,可以为我们预测青少年近视的发展进程提供一种简便的尝试性方法. 相似文献
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《科技风》2020,(7)
目的:探析准分子激光角膜切削术治疗近视眼的效果。方法:2017年10月～2018年10月,在我院接受治疗的近视患者选取162例,分组时以近视度数为依据,高度近视者设为观察组,(126眼)-6. 00D,低中度近视者设为对照组,(198眼)-6. 00D,162例患者治疗时均选择准分子激光角膜切削术,对其实施调查访问,查看近期治疗的效果。结果:通过统计数据,162例患者经治疗后,视力改善明显,且经近期访问调查显示,对比两组视力恢复情况,观察组较对照组低,对比存在差异(P0. 05)。结论:近视眼的治疗选择准分子激光角膜切削术,可使其视力水平得以有效改善,且患者若为低中度近视,取得的效果更佳,出现并发症的几率低,存在推广价值。 相似文献
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目的：评价准分子激光角膜切削术（PRK）及准分子激光原位角膜磨镶术（LASIK）对近视散光的治疗效果。方法：采用美国SCAN－195型准分子激光系统对74例（138只眼），近视散光的患进行治疗，PRK组近视度数在－1.00--5.00D,散光度数在－0．50－－3．00D之间的患，共61只眼；LASIK组为近视度数大于－5．00D伴散光或散光度数大于－3．00D的患，共77只眼。结果：术后视力；所有病例均随访1a以上，PPK组视力均≥0．5，其中91．98％的患≥0．8；LASIK组视力均≥0．5，其中90．12％的患≥0．8。结论：PRK和LASIK治疗近视散光是安全，有效并且可行。 相似文献
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《西藏科技》2020,(3)
目的对尿毒症临床不同血液净化方式治疗中对机体钙,磷代谢以及心血管病变影响进行研究分析。方法研究采用回顾性分析,将2017年3月份-2018年3月份收治的尿毒症患者采用透析治疗的患者93例,按照透析方式的不同分成两组,腹膜透析组(n=47),血液透析(n=46),对两组患者进行半年的跟踪随访。结果?(1)两组患者的治疗后跟踪随访血钙(2. 19±0. 23) VS(2. 20±0. 17),血磷(1. 79±0. 63) VS(1. 73±0. 96)指标比较无明显差异,P 0. 05,无统计学意义。(2)两组患者接受治疗前各项指标水平比较基本相同,P 0. 05,无统计学意义。经治疗随访半年,两组患者的动脉硬化指数较治疗前有变化,比较有统计学意义(P 0. 05);随访半年两组基线各项指标水平比较无明显差异,P 0. 05,无统计学意义。(3)两组接受治疗前生活质量各项评分比较无差异,经治疗后,生活质量均不同程度改善,腹膜透析组生活质量调查中社会职能,生理评分,情感评分,生命活力均较血液透析组不同程度提高,组间比较差异,P 0. 05,有统计学意义。(4)腹膜透析组不良心血管事件发生率(10. 64%)低于血液透析组(19. 57%),两组比较不良事件发生率有差异,P 0. 05,有统计学意义。结论不同血液净化方式临床应用维持治疗尿毒症患者对钙,磷代谢,动脉硬化指数指数无明显影响;但是腹膜透析组患者生活质量较高于血液透析组,不良心血管事件发生率略低;两种治疗均有优劣势,临床应根据患者的特点选择方式。 相似文献
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目的：探讨循证护理在儿科护理中的临床效果。方法：对来我院诊治的80例患儿入院资料进行分析,将其随机分为两组。对照组进行口头宣教护理,实验组进行循证护理,比较两组护理效果。结果：实验组95％护理效果理想,高于对照组（85%）（P〈0．05）;实验组住院（3．5±1．2）天后痊愈出院,短于对照组（6．55±1．5）天（P〈0．05）;治疗后实验组复发率10％,低于对照组40％（P〈0．05）。结论：儿科疾病发病率较高,疾病类型也相对较多,采用循证护理效果理想,值得推广使用。 相似文献
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目的：观察光子技术结合口服药物治疗不同类型黄褐斑的临床疗效。方法：以2007年3-6月,对丹东地区具有治疗黄褐斑资质的医疗美容机构的诊断的黄褐斑患者92人进行检查和治疗。利用Wood灯对92例黄褐斑患者皮损进行硬察,根据皮损的不同表现分为表皮型、真皮型和混合型,均采用光子技术结合口服药物的治疗,对比治疗结果,并将数据资料输入计算机以SPSS11．5软件进行统计分析,以P〈0．05为显著差异。结果：表皮型组总有效率明显优于真皮型组和混合型组像皮型组与真皮型组比较P〈0．05;表皮型组与混合型组比较P〈0．05）;混合型组与真皮型组之间无显著差异（混合型组与真皮型比较P〉0．05）。结论：光子结合口服药物对黄褐斑表皮型、真皮型和混合型均有效,但对黄褐斑表皮型疗效优于其它两型。 相似文献
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目的观察高原经口、鼻两种途径气管插管后体外循环（CPB）条件下鼻出血的情况。方法选择我院自2000年在体外循环（CPB）条件下实施心内直视手术以来患者600例。随机分为两组，①口腔插管组；②鼻腔插管组。两组分别于静脉注射肝素前（T0）、体外循环中（T1）、停体外循环鱼精蛋白中和肝素后10min（T2）、记录各时段鼻出血的例数（鼻腔出血量I〉0．5ml记录为鼻出血）。结果口腔组T0、T1、T2之间比无统计学意义（P〉0．05）；鼻腔组T0与T2比无统计学意义（P〉0．05），与T0及T2比，T1鼻出血的例数明显增加（P〈0．05）。与口腔组比较，鼻腔组T0、T2无统计学意义（P〉0．05），T1鼻出血的例数明显增加（P〈0．05）。结论高原地区经口腔气管插管后体外循环条件下，鼻出血的例数与静脉注射肝素前，停体外循环鱼精蛋白中和肝素后10min后基本相同且少；经鼻腔气管插管后体外循环条件下，鼻出血例数明显增多。 相似文献
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目的探讨洛丁新（盐酸贝那普利）治疗高原藏族慢性充血性心力衰竭（CHF）的疗效及安全性。方法选择2005年至2010年入住我院内科射血分数（EF）≤40％的心力衰竭患者80例,随机分为两组：治疗组40例,在常规治疗基础上加用盐酸贝那普利5mq至最大耐受量10mg。对照组40例,住院给予常规纠正心力衰竭治疗。结果与对照组相比较治疗组显效率、有效率均显著提高（P〈0．05）;治疗组、对照组治疗前后射血分数（LVEF）及6分钟步行距离均有明显改善（P〈0．05）,试验结束时与对照组相比治疗组患者射血分数（LVEF）及6分钟步行距离改善更加显著（P〈0．05）。两治疗组安全性指标无显著性差异。结论洛丁新能够安全有效用于高原藏族慢性充血性心力衰竭患者． 相似文献
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《西藏科技》2020,(1)
目的分析卡式微柱凝胶试验在临床输血检验中的应用方法;方法从我院2017年11月至2019年3月收治的患者中选取100例作为观察对象,采用随机数表法将全部患者平均纳入对照组和实验组,每组均为50例,对两组患者的血液样本均进行血型抗原检测,其中,对照组采用盐水凝集法,观察组采用卡式微柱凝胶试验法,对比两组正向定型、反向定型符合率和患者血液检查结果。结果比较两组患者的正、反向定型符合率,实验组(96. 00%,92. 00%)高于对照组(76. 00%,80. 00%),两组符合率差异明显(P 0. 05),而对患者血液进行检测后,仅有1例(1. 00%)在交叉配血后出现血型不符问题。结论对输血患者采用卡式微柱凝胶试验进行血型检测,可提升检测准确定,利于降低配血输血不符合问题,对保证患者输血安全性具有重要意义。 相似文献
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A research group led by Prof. ZHAI Qiwei from the Institute for Nutritional Sciences under the CAS Shanghai Institutes for Biological Sciences has discovered that even relatively low doses of resveratrol-a chemical found in the skins of red grapes in red wine-can improve the sensitivity of mice to the hormone insulin according to a report in the October issue of Cell Metabolism.…… 《中国科学院院刊(英文版)》2008,22(1):14-15
Aresearch group led by Prof. ZHAI Qiwei from the Institute for Nutritional Sciences under the CAS Shanghai Institutes for Biological Sciences has discovered that even relatively low doses of resveratrol--a chemical found in the skins of red grapes and in red wine--can improve the sensitivity of mice to the hormone insulin, according to a report in the October,2007 issue of Cell Metabolism. As insulin resistance is often characterized as the most critical factor contributing to the development of Type 2 diabetes, the findings“provide a potential new therapeutic approach for preventing or treating” both conditions, the researchers said. 相似文献
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Marjorie Armstrong-Stassen Margaret Landstrom Ramona Lumpkin 《The Information Society》1998,14(2):153-164
This study examined how students who had no prior experience with videoconferencing would react to the use of videoconferencing as an instructional medium. Students enrolled in seven different courses completed a questionnaire at the beginning of the semester and again at the end of the semester. Students at the origination and remote sites did not differ in their reactions toward videoconferencing but there was a significant difference for gender. Women reacted less favorably to videoconferencing. Compared to the beginning of the semester, students reported significantly less positive attitudes toward taking a course through videoconferencing at the end of the semester. There were no significant differences in students' attitudes toward videoconferencing across courses at the beginning of the semester but there were significant differences across the courses at the end of the semester. The results suggest the need for better preparation for both students and instructors. 相似文献
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A joint study by Prof. ZHANG Zhibin from the CAS Institute of Zoology his co-workers from Norway US Swiss have indicated that historical outbreaks of migratory locusts in China were associated with cold spells suggesting that China's projected climate warming could decrease the pest's numbers. The study was published in Proceedings of the National Academy of Sciences on September .…… 《中国科学院院刊(英文版)》2008,22(1):6-7
Ajoint study by Prof. ZHANG Zhibin from the CAS Institute of Zoology and his co-workers from Norway, US and Swiss have indicated that historical outbreaks of migratory locusts in China were associated with cold spells, suggesting that China＇s projected climate warming could decrease the pest＇s numbers. The study was published in Proceedings of theNational Academy of Sciences on 17 September, 2007. 相似文献
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Caroline Haythornthwaite 《The Information Society》2001,17(3):211-226
A computer-mediated group is a complex entity whose members exchange many types of information via multiple means of communication in pursuit of goals specific to their environment. Over time, they coordinate technical features of media with locally enacted use to achieve a viable working arrangement. To explore this complex interaction, a case study is presented of the social networks of interactions and media use among members of a class of computer-supported distance learners. Results show how group structures associated with project teams dominated who communicated with whom, about what, and via which media over the term, and how media came to occupy their own communication niches: Webboard for diffuse class-wide communication; Internet Relay Chat more to named others but still for general communication across the class; and e-mail primarily for intrateam communication. Face-to-face interaction, occurring only during a short on-campus session, appears to have had a catalytic effect on social and emotional exchanges. Results suggest the need to structure exchanges to balance class-wide sharing of ideas with subgroup interactions that facilitate project completion, and to provide media that support these two modes of interaction. 相似文献
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Active biological molecules functional structures can be fabricated into a bio-mimetic system by using molecular assembly method. Such materials can be used for the drug delivery disease diagnosis therapy new nanodevice construction.…… 《中国科学院院刊(英文版)》2008,22(1):22-22
Active biological molecules and functional structures can be fabricated into a bio-mimetic system by using molecular assembly method. Such materials can be used for the drug delivery, disease diagnosis and therapy, and new nanodevice construction. 相似文献
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《中国科学院院刊(英文版)》2008,22(1):2-3
CAS should stick to the principle of rendering service to, and giving impetus for, the development of China＇s science enterprise by making S＆T innovations, said CAS President LU Yongxiang. The CAS president made the remarks in a recent talk to communicate the gist of the winter session of the Party＇s Leading-member Group at CAS, which was held from 7 to 11 January in Beijing. 相似文献
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Electronic data interchange (EDI) provides means for interorganizational communication, creates network externalities, requires an advanced information technology (IT) infrastructure, and relies on standards. In the diffusion of such innovations, institutional involvement is imperative. Such institutions contain governmental agencies, national and global standardization organizations, local government, and nonprofit private organizations like industry associations. The last type of organizations we call intermediating institutions. They intermediate or coordinate ("inscribe") the activities of a group of would-be adopters. Unfortunately, little is known of how these organizations shape the EDI diffusion trajectory. In this article we examine one specific type of intermediating organizations?industry associations?and how they advanced the EDI diffusion process in the grocery sectors of Hong Kong, Denmark and Finland. We identify six institutional measures, placed into a matrix formed by the mode of involvement (influence vs. regulation) and the type of diffusion force (supply push vs. demand pull), that can be mobilized to further the EDI diffusion. Industry associations were found to be active users of all these measures to varying degrees. Their role was critical especially in knowledge building, knowledge deployment, and standard setting. Furthermore, institutional involvement varied due to policy and cultural contingencies and power dependencies. 相似文献
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《中国科学院院刊(英文版)》2008,22(1)
With great care, Dr. ZHOU Zhonghe takes out a package wrapped by cotton tissue from a drawer and says: "This is the gem of our collections: the fossil of a bird that lived 125 million years ago!" Then, pointing at a tiny mound, he explains: "Look, this is the claw and that is the head. It was in the egg shell and ready to hatch ... The species fell into a family of waterside inhabitants." 相似文献
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Leah A. Lievrouw 《The Information Society》2000,16(2):155-159
This essay focuses on universal service and the Internet as means to support social and political participation. The emphasis on access to telecommunications systems in conventional approaches to universal service is contrasted with access to content. A model of the information environment is described that accounts for the roles of content and conduit, both of which are necessary conditions to achieve true access. A method is outlined for employing information indicators to observe or measure the information environment. 相似文献
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Puay Tang 《The Information Society》1998,14(1):19-31
The increasing prospects of digital piracy has prompted the perceived need by electronic publishers to adopt technical systems of protection, and governments to reform their copyright laws. This article is a preliminary study of the management of intellectual property by electronic publishers, defined as those involved in the production of online databases, and CD-ROMs. It focuses on three main issues: (1) how electronic publishers view the increasing threat of piracy; (2) the methods of protection employed to protect intellectual property in digital format; and (3) the importance of technological protection of intellectual property in electronic publications. The analysis is based on a sample of 23 UK electronic publishers. The interviews revealed an interesting assortment of protection methods and did not show that technological protection was a preferred way. Instead, the means of protection, in addition to copyright law, comprised niche markets, pricing, trust, bad publicity, and nontechnical and technical means. 相似文献