高校图书馆网络安全若干问题的思考

随着计算机技术和通信技术的飞速发展与紧密结合,促进了计算机网络技术的高速发展,在带来了前所未有的海量信息的同时,网络的开放性和自由性也产生了私有信息和数据被破坏或侵犯的可能性,因此,网络信息的安全性变得日益重要起来。针对高校图书馆网络安全中的若干问题,提出了保证网络安全所应采取的技术和措施,目的在于为其他高校图书馆进行网络安全建设提供借鉴作用。     

清代归化城土默特地区的移民过程考探

通过对清代归化城土默特地区移民过程的研究,证明该地区移民是多种因素造成的,但清廷边疆政策一直主导移民过程。对清代归化城土默特地区的移民过程进行了考探,以期为研究其他地区移民带来参考借鉴。     

降低旬阳县核桃结果大小年发生机率的措施

本文阐述了旬阳核桃大小年发生的主要原因,同时结合生产实际提出了如何降低核桃大小年发生机率的措施。     

嗜金微生物研究概况

在广泛文献检索基础上,对嗜金微生物的种属、富集黄金的机理、工业应用价值及潜力进行了概述,为进一步对其开发利用提供科学资料。     

福建省漳州师范学院经济适用节能型图书馆中心机房初步规划

根据漳州师范学院图书馆的自身条件和电子资源服务现状按照经济适用节能型理念对图书馆中心机房进行初步规划,通过Vmware ESX sever虚拟服务器软件的方式并结合电子资源使用率合理规划,减少了中心机房服务器数量,节约了成本,减少了热排放,增加了稳定性,提高了服务质量,已初见成效。     

Effects of pirenzepine on expression of MMP-2 and TIMP-2 in stroma of sclera in chick myopic eyes

AIM:To observe the effect of intravitreal injection of pirenzepine on form-deprivation myopia in chicks. METHODS:Forty-one day old chicks were randomly divided into 4 groups:normal control group, form deprivation group, vehicle control group and pirenzepine injection group. The right eyes of all chicks were used as experimental eyes. The deprived eyes in vehicle control group and pirenzepine injection group received daily intravitreal injection of vehicle control solution(0.01 mol/L PBS) and pirenzepine(1%in PBS), respectively. Optical examinations such as refraction, axial length and equatorial diameter were made at the end of the 5th day. The mRNA and protein levels of matrix metalloproteinase 2(MMP-2) and tissue inhibitor of metalloproteinase-2(TIMP-2), and the activity of MMP-2 were detected by RT-PCR, Western blotting and zymography analysis,respectively. RESULTS:Refraction, axial length and equatorial diameter of the eyes in pirenzepine injection group were significantly lower than those in form deprivation group and vehicle control group(P<0.05), but those were higher(P<0.05) and the eyes were relatively myopic as compared with normal control group. The mRNA expression, protein le vels and activity of MMP-2 in pirenzepine group were significantly higher than those in normal control group(P<0.01), and were significantly lower than those in form deprivation group and vehicle control group(P<0.01, P<0.01). The mRNA and protein levels of TIMP-2 in pirenzepine group were significantly lower than those in normal control group(P<0.01), and was significantly higher than those in form deprivation group and vehicle control group(P<0.01, P<0.01). CONCLUSION:Intravitreal injection of pirenzepine may partly prevent form-deprivation myopia by modulating the expression of MMP-2 and TIMP-2 in the fibrous layer of sclera.     

Effect of dietary betaine levels on growth performance and hepatic intermediary metabolism of GIFT strain of Nile tilapia Oreochromis niloticus reared in freshwater

An 8‐week feeding experiment was conducted to determine the effect of dietary betaine levels on the growth performance and hepatic intermediary metabolism of genetically improved farmed tilapia (GIFT) strain of Nile tilapia Oreochromis niloticus (mean initial body weight: 78.3 ± 1.3 g, means ± SD). Six practical diets were formulated with the incorporation of betaine at the levels of 0 (control), 5, 10, 15, 20 and 25 g kg⁻¹. Survival showed no significant differences among the treatments (P > 0.05). The highest and lowest weight gain (WG) and specific growth rate (SGR) were observed for fish fed the diets containing 5 and 0 g kg⁻¹ (control) betaine, respectively. Feed intake showed similar trend with WG and SGR. In contrast, feed conversion ratio was the lowest when dietary betaine level was 5 g kg⁻¹. In general, dietary betaine supplementation showed no significant effect on hepatic composition of tilapia. Condition factor and viscerosomatic index tended to increase with increasing dietary betaine levels from 0 to 5 g kg⁻¹ and then decline when dietary betaine levels further increased from 5 to 25 g kg⁻¹. In contrast, hepatosomatic index declined with increasing dietary betaine levels (P < 0.05). Dietary betaine levels significantly influenced several hepatic enzymatic activities, including succinate dehydrogenase, lactate dehydrogenase, malic dehydrogenase, lipoprotein lipase and hepatic lipase, suggesting that dietary betaine addition had significant effects on nutrient metabolism in the liver. Based on the second‐order polynomial regression analysis of WG, 12.5 g kg⁻¹ of dietary betaine level seemed optimal for genetically improved farmed tilapia strain of O. niloticus.     

寻路算法在中文金融机构名匹配中的应用

《岳阳楼记》对韩国岳阳楼题诗的影响，主要体现在其体现的以天下为己任的儒家社会责任感。通过对韩国岳阳楼题诗中意象的统计学分析，我们还看到了《岳阳楼记》在文本营建层面对题诗的影响及其流变。     

我国省级农业科学院的学科竞争力比较研究*

学科竞争力是省级农业科研机构科研实力的重要体现。文章以江浙沪鲁京粤6省农业科学院为研究对象，以SCI论文和中文核心期刊论文为数据源，采用文献计量的方法，对比分析了我国省级农科院的整体优势学科和各自优势学科的竞争力情况。研究发现，省级农科院的学科发展既有普遍相似性，又有各自的特色优势学科，各机构之间的学科竞争力差距较大。该研究为我国省级农科院学科建设提供决策参考。