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先天性锁肛猪类型及常规生理生化指标分析
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作者 蒋凯 《养殖与饲料》 2024年第3期21-26,共6页
[目的]明确先天性锁肛猪的类型、常规生理生化指标的变化,为后续研究提供基础数据。[方法]对43头先天性锁肛大白猪进行临床诊断或解剖观察来判定锁肛类型,分别在1、10、60、120、180日龄称量5头直肠阴道瘘锁肛猪与正常对照猪(全同胞)的... [目的]明确先天性锁肛猪的类型、常规生理生化指标的变化,为后续研究提供基础数据。[方法]对43头先天性锁肛大白猪进行临床诊断或解剖观察来判定锁肛类型,分别在1、10、60、120、180日龄称量5头直肠阴道瘘锁肛猪与正常对照猪(全同胞)的体质量,并比较90、180日龄的血常规和血清生化指标,分析肝、脾、肺、肾、小脑和大脑等6种组织器官的HE切片。[结果]先天性锁肛大白猪存在肛门直肠均闭锁、直肠阴道瘘、直肠尿道瘘和肛门闭锁直肠未闭锁4种锁肛类型;直肠阴道瘘锁肛猪的生长速度与正常对照猪相比无显著差异,血常规数据和血清生化结果未表现出显著差异,组织切片学结果显示未表现出明显的病理性变化。[结论]直肠阴道瘘锁肛猪生长速度、血液生理生化指标和组织切片与正常对照猪相比均无显著差异,不存在健康不良状况。 展开更多
关键词 大白猪 先天性肛症 类型 生长速度 血液生理生化指标
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嵌入式数据库SQLite中锁机制研究及改进
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作者 孙勇毅 《煤炭技术》 CAS 北大核心 2010年第9期192-193,197,共3页
并发控制机制是数据库系统中的一项关键技术,文章介绍了嵌入式数据库SQLite中的并发控制机制--两段封锁协议的内容及SQLite中的锁类型。在原有基础上对锁机制进行改进,增加了锁粒度,提出一种动态多粒度封锁机制。详细介绍了动态多粒度... 并发控制机制是数据库系统中的一项关键技术,文章介绍了嵌入式数据库SQLite中的并发控制机制--两段封锁协议的内容及SQLite中的锁类型。在原有基础上对锁机制进行改进,增加了锁粒度,提出一种动态多粒度封锁机制。详细介绍了动态多粒度封锁机制的算法流程。改进后的并发方法既提高SQLite的并发度,又保证嵌入式数据库的内存开销。 展开更多
关键词 SQLITE 两段封协议 锁类型 动态多粒度封机制
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雷达兵作战计划协同制定系统锁机制研究
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作者 田闹 李强 邱小波 《微计算机信息》 北大核心 2008年第30期35-37,共3页
加锁是分布式协同编辑系统中防止并行操作中出现冲突的一种重要手段。本文针对基于GIS组件的雷达兵作战计划协同制定系统的特殊要求提出一种加锁机制,用户可以将图层锁、对象类型锁、区域锁和对象锁交叉使用。这种锁机制是一种细粒度和... 加锁是分布式协同编辑系统中防止并行操作中出现冲突的一种重要手段。本文针对基于GIS组件的雷达兵作战计划协同制定系统的特殊要求提出一种加锁机制,用户可以将图层锁、对象类型锁、区域锁和对象锁交叉使用。这种锁机制是一种细粒度和粗粒度的结合,使用户间的协作更加灵活。 展开更多
关键词 对象类型 区域 对象
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Locking plate versus external fixation for type C distal radius fractures: A meta-analysis of randomized controlled trials 被引量:12
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作者 Dong Wang Lei Shan Jun-Lin Zhou 《Chinese Journal of Traumatology》 CAS CSCD 2018年第2期113-117,共5页
Purpose: Distal radial fracture is one of the most common fractures. Up to now, locking plates (LP) and external fixation (EF) are two conventional surgical approaches to type C radius fracture. Which method is s... Purpose: Distal radial fracture is one of the most common fractures. Up to now, locking plates (LP) and external fixation (EF) are two conventional surgical approaches to type C radius fracture. Which method is superior has not yet reached a consensus. We try to assess the clinical effectiveness of the two in- terventions by this meta-analysis. Methods: We used network to search the PubMed, Embase, and Cochrane Medical Library of randomized controlled clinical trials about the type C distal radius fractures performed according to the search strategy mentioned in Cochrane Handbook 5.1.0 from Jan. 2005 to Jan. 2016. Patients in the experimental group were used LP, in the control group were included EF and other surgical approaches. Publication language was restricted to English. Studies that patient population and surgical indication did not define had been excluded. Studies must report at least one of the outcomes as follow: radial inclination, patmar tilt, ulnar variance, range of wrist flexion and extension, and range of wrist supination and pronation. The trials in which participants included children were excluded. We used Jadad study scores to appraise the study. Results: Seven studies included 162 patients (LP group) and 190 patients (EF group). We compared the radial inclination, palmar tilt, ulnar variance, range of wrist flexion and extension, and range of wrist supination and pronation. The radial inclination were revealed a difference favoring LP over EF [WMD = 1.84, 95% CI (0.17, 3.50), p = 0.03] and the palmar tilt and ulnar variance was no significant difference between the two groups [(WMD = 3.61, 95% CI (0.00, 7.23), p = 0.05; WMD = 0.05, 95% CI (-0.99,1.09), p = 0.93]. The functional activities of range of flexion and extension and range of supination and pronation between the two groups was no difference [WMD = 10.04, 95% CI (-6.88, 26.96), p = 0.24; WMD = 12.53, 95% CI (-9.99, 35.06), p = 0.28]. Conclusion: Locking plate and external fixation is feasible to heal radius type C fracture. We found the small difference between the two groups on imaging examination. The locking plate has the advantage on maintaining reduction, however no significant difference regarding outcomes has been found be- tween the two groups. 展开更多
关键词 l.o^king plate External fixation Type C Distal radius fractures Meta-analysis
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