基于双向 S-粗集的动态粗传递模型

根据信息传递中我们需要准确可靠的信息这种实际情况,利用双向S-粗集理论提出了一种动态粗传递模型,即双向S-下近似动态粗传递模型.分析了该模型的特性,得到了信息保持不变、信息发生损失与知识的关系,给出了提高信息传递精确性的方法以及该模型的应用.     

The effect of intraosseous graft length on tendon-bone healing in anterior cruciate ligament reconstruction using flexor tendon

The current study was performed to understand the relationship between graft length placed within the bone tunnel and intraosseous graft healing in anterior cruciate ligament (ACL) reconstruction. Twenty-four adult beagle dogs were divided into two groups of 12 animals each. In each animal, ACL reconstruction using a 4-mm diameter autogenous flexor tendon graft was done in the left knee. In groups I and II, the graft having a length of 15 and 5 mm, respectively, was placed within the tibial tunnel. The proximal end of the graft was placed through the over-the-top route in all animals. In each group, five animals were sacrificed immediately after surgery, and the remaining seven were sacrificed at 6 weeks postoperatively. Biomechanical and histologic evaluations were performed. In pull out testing, the ultimate failure load and the linear stiffness of the graft-tibia complex harvested at 6 weeks were significantly greater than those harvested at the time-zero period. There were no significant differences in those parameters between groups I and II at 6 weeks. In each group, the perpendicular collagen fibers connecting the tendon to the bone tunnel wall were observed only in the narrow area located close to the intra-articular tunnel outlet. In conclusion, excessively long placement of the flexor graft within the bone tunnel does not result in an additional increase of anchoring strength and stiffness of the graft in ACL reconstruction.     

论现代医院技术创新

创新是医院发展主题,本文采用综合分析、收集资料、对比方法,对技术创新内容、技术创新原则、技术创新趋势进行了较详细的分析研究.     

MRI的选购定位

对MRI若干主要参数进行总结,结合实际应用体会,对我院MRI设备选购进行讨论,以期对MRI设备的选购定位提供参考.     

Changing prevalence and knowledge of urinary incontinence among Hong Kong Chinese women

A territory-wide telephone survey was conducted in Hong Kong to assess the prevalence, knowledge, and treatment-seeking behaviour of Chinese women with urinary incontinence, using validated Chinese version of Urogenital Distress Inventory (UDI-6) and Incontinence Impact Questionnaire (IIQ-7). Women, 540, aged between 17 to 77 years were interviewed. Of the respondents, 40.8% reported stress urinary incontinence, 20.4% had urge incontinence and 15.9% had mixed incontinence. Among these, 16.0% reported quality of life impairment; 9.3% felt frustrated with low morale, and 15.2% had nervous and anxiety problems. However, as many as 78.3% of the respondents did not know that stress urinary incontinence is a disease entity, and 60.6% thought that leakage of urine was a normal aging process. For those respondents having stress urinary incontinence, the first treatment of choice was physiotherapy. The second choice was medication, and surgical treatment was the last option. Respondents with stress urinary incontinence showed higher education level.     

南通市居民健康知识水平现状及对策

为全面了解和准确掌握南通市各行各业、中小学校健康知识的知晓情况,对创建国家卫生城市健康教育工作进行效果评估。调查显示,南通市11个片区健康知识的总知晓率居民为93.42%,学生为91.08%。要真正提高全体市民的健康教育水平,下一步必须采取三大对策,即:形成“抓反复、反复抓”的常态机制;加大健康教育投入;教育部门加强全市学生的健康知识普及工作,对卫生部门列入学校卫生的指标加以考核。只有这样,南通市的健康教育工作才能跃上新台阶。     

次氯酸钠和氢氧化钙对牙本质弹性模量和挠曲强度的影响

目的 :评估 5 %次氯酸钠 (NaOCl)溶液和饱和氢氧化钙 [Ca(OH) 2 ]溶液对牙本质弹性模量和挠曲强度的影响 ,以进一步了解根管治疗过程中药物对牙齿机械性能的影响。方法 :取新鲜拔除的完整前磨牙制成标准规格牙本质条 ,经 5 %NaOCl和饱和Ca(OH) 2 溶液处理 ,三点加荷系统测定其弹性模量和挠曲强度。结果 :5 %NaOCl使牙本质弹性模量和挠曲强度显著降低 ;饱和Ca(OH) 2 溶液使牙本质挠曲强度显著降低 ,对弹性模量无显著影响 ;5 %NaOCl处理后再用饱和Ca(OH) 2 溶液处理对牙本质弹性模量和挠曲强度无进一步影响。结论 :5 %NaOCl和饱和Ca(OH) 2 溶液对牙本质的机械性能有一定影响     

无皂乳液聚合法合成均一性聚苯乙烯微球

研究了聚苯乙烯微球的合成过程中，离子强度、聚合时间对粒径的影响及其稳定性，实验结果表明：适当改变离子强度、聚合时间可以得到不同粒径的聚苯乙烯微球，且粒子稳定性较好。     

影响医学人才科技创新相关因素初探

通过查阅文献并结合专家咨询，找出了医学人才科技创新的影响因素（包括主观因素与客观因素），并对创新影响因素和机制进行分析。     

Incisional healing in rats treated with diethyl maleate

Diethyl maleate (DEM) which binds and thus depletes tissue glutathione levels was used to aggravate the injury and to determine its effect on incisional healing. A 5 cm dorsal midline skin incision was performed on 40 albino Wistar rats in two groups and then closed by interrupted sutures. Groups received 0.9% NaCl and DEM at a dosage of 1 mg/kg/day intraperitoneally for seven days, respectively. On postoperative days 7 and 14, histopathological assessment and tensile strengths were measured. The DEM treated group had a marked inflammation with poorly defined collagen formation and the tensile strength measurements revealed a significant decrease (p <0.001) on the 7t day. On the other hand, the first group showed better collagenization and a lesser degree of inflammation. However, on the 14th day, there was no noticeable histopathological difference between the two groups; but, tensile strength values of the second group were still lower (p <0.05). In this animal model, DEM postponed the healing process and reduced the tensile strength.