浅析高职院校“多维立体化”单独招生人才选拔模型

论文根据高职教育的特点和国家对高职院校招生的改革试点,构建了高职院校"多维立体化"单独招生人才选拔模型,鉴于此,作者阐述了高职院校"多维立体化"单独招生人才选拔模型的理论依据,总结分析了该模型的意义与价值。     

浅谈当前会计人员存在问题与解决途径

该文针对当前会计人员普遍存在文化水平偏低、职业道德修养欠缺等问题,提出转变观念、提高行业准入等解决途径,以全面提高会计人员综合素质,充分发挥会计职能,满足社会发展需要.     

基于AT89S52的多路温度检测设备的设计

温度检测是日常生活中最基本的环境参数。本文利用AT89S52单片机和DS18B20数字温度传感器直接相连进行温度检测,免除了传统的温度检测设备必须经过A/D转换环节才能与CPU通信的繁琐环节,具备设计简洁、成本低廉、转换功率高等优点。     

郜海燕: 为农民的四季"保鲜"

"帮助农民是我的责任."浙江省农科院研究员郜海燕说,每当收到农业广播电视学校、科协、农业厅和果蔬协会的邀请,自己一定会挤出时间赶去授课. 在农产品物流保鲜和精深加工领域,郜海燕耕耘了近40年,带动了一方方经济,富了一方方百姓.     

高职计算机专业基础课程教学模式初探

面对国内高职教育教学改革浪潮的全面推进,本文就高职教育的计算机专业基础课程教学方法作了初步探索和研究,密切联系自己和所在学校的教学实践,提出行之有效的,符合实际需求的教学方法和教学手段.     

Electrospun Small Diameter Tubes to Mimic Mechanical Properties of Native Blood Vessels Using Poly (L-lactide-co-ε-caprolactone )and Silk Fibroin: a Preliminary Study

Mismatch in mechanical properties can induce intimal hyperplasia,which is one of the main reasons for the failure of small diameter artificial blood vessels. Electrospun small diameter tubes with tailored mechanical properties were fabricated through blending poly( L-lactide-co-ε-caprolactone)( PLCL) and silk fibroin( SF)with the mass ratios of 30 /70,50 /50,and 70 /30 in this study.Scanning electron microscopy( SEM) and mechanical testing were used to characterize morphological and mechanical properties of the tubes. Results showed that tensile strength of the tubes was higher than most of the native blood vessels,and elongations at break of them were improved greatly by blending PLCL. Compliances of the tubes were all higher than 1% /13. 33 kPa( 1% /100 mmHg).Particularly,tubes with blending mass ratio of 50 /50 showed similar compliance with human native femoral arteries,which provided a promising biomaterial that could be applied on small diameter vascular applications.     

Fatigue Performance of Fabrics of Stent-Grafts Supported with Z-Stents vs. Ringed Stents

Stent-grafts were commercialized rapidly and gained a broad clinical acceptance over the past two decades. However,relatively more recent recognition of particular stent-graft design shortcomings have been identified which need to be addressed. It appears that various stent-graft designs may be more or less resistant to metal fatigue and /or fabric abrasions which can lead to type III and type IV endoleaks over the long term. Therefore,it is necessary to investigate the fatigue performance of the most common stentgraft designs: Z-stents and ringed stents,in a long-term in vitro fatigue simulation environment. This paper aimed to analyze nondestructively( gross observations) and destructively( fabric characteristics,mechanical and chemical properties) in order to put forward suggestions to improve the fabric and stent characteristics that may prevent type III and IV endoleaks. The fabric supported with ringed stent-grafts remained nearly completely intact after 168h. However, the fabric supported with Z-stents demonstrated significant damage. Fabric characteristics and tensile strength of the fibers did not present a significant difference between the control and fatigue simulated specimens. The crystallinity declined for both specimens. The fatigue performance of fabrics supported with ringed stents appears to be superior to that supported with Z-stents. The potential for a dynamic and destructive interaction between the apices of Z-stents which can lead to fraying and /or tearing of the graft fabric must be addressed in future designs.     

基于CSFQ的路由器带宽公平性算法的改进研究

针对核心无状态公平队列调度(CSFQ)的丢包算法不适用于TCP流的问题,提出了一种改进算法my-CS-FQ,能够根据网络状况动态地调整TCP流和UDP流各自的丢包行为,解决TCP流与UDP流的带宽分配公平性.大量仿真实验结果表明my-CSFQ算法能够提高TCP流同UDP流竞争网络资源的能力,更有效地利用链路带宽,提高网...     

甘肃某电厂健康人群外周血细胞参数调查

了解某厂健康体检人群静脉血细胞参考值水平.采用回顾分析法,对572例健康成年人全血细胞部分参数进行分析.该地区白细胞计数(WBC)参考范围男性为(3.7 ～9.7)×109/L,女性为(3.3 ～8.6)×109/L;血红蛋白(HGB)参考范围男性为(131～172 )g/L,女性为(98 ～ 159)g/L;血小板计数(PLT)参考范围男性(93 ～ 221)×109/L;女性为(99～239)×109/L.本次观察健康成人WBC、HGB、PLT均低于全国调查平均参考范围;与兰州地区参考范围亦有差异.有必要建立符合工业区健康人群的血细胞参考范围.     

甘肃省积石山县红细胞血型基因分布及精准输血中临床研究

目的:对甘肃省少数民族地区不同民族433例血液标本进行RH(C/c/E/e)、Lewis(Lw/Lw)、Duffy(Fy/Fy)等12种红细胞血型基因检测分析,为我省少数民族血液学研究、临床输血安全及稀有血型库建设等提供数据支撑,应用于精准输血医学.方法:对433例标本用荧光PCR法进行血型基因检测分析和统计,使血型基...