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Search Results: 1 - 10 of 129496 matches for " 吴盼玉 "
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上期望空间中独立随机变量的不等式

应用概率统计 , 2015,
Abstract: 本文给出了上期望空间中独立随机变量部分和的最大不等式、指数不等式、Marcinkiewicz-Zygmund不等式.并且应用指数不等式和Marcinkiewicz-Zygmund不等式研究了随机变量部分和序列完备收敛的性质.
经皮克氏针撬拨复位弹性髓内钉固定治疗儿童重度桡骨颈骨折
PERCUTANEOUS Kirschner WIRE POKING REDUCTION AND ELASTIC STABLE INTRAMEDULLARY NAILING FIXATION FOR SEVERE DISPLACED RADIAL NECK FRACTURES IN CHILDREN

,官建中,,周建生,代秀松,王晓,王照东,陈笑天
- , 2015, DOI: 10.7507/1002-1892.20150317
Abstract: 目的探讨经皮克氏针撬拨复位弹性髓内钉固定治疗儿童重度桡骨颈骨折的疗效。 方法2010年11月-2014年8月,采用经皮克氏针撬拨复位后再植入弹性髓内钉固定方法治疗17例重度桡骨颈骨折患儿。男13例,女4例;年龄6~14岁,平均8.7岁。左侧8例,右侧9例。均为跌倒摔伤导致骨折。骨折成角64~102°,平均84°。按照Judet分型均为Ⅳ型,其中Ⅳ a型7例,Ⅳ b型10例。伤后至手术时间1~7 d,平均4.2 d。术后肘关节功能按照Tibone-Stoltz的临床功能评定标准评价;影像学评价按照Metaizeau等X线片评定标准评定。 结果手术时间20~50 min,平均30 min。术后患者切口均Ⅰ期愈合,无感染、桡神经深支及感觉支损伤等并发症发生。17例均获随访,随访时间12~46个月,平均20个月。术后2个月时骨折均达骨性愈合,随访期间无骨折畸形愈合、骨骺早闭、桡骨头骺缺血性坏死、头骺变形膨大、肘内外翻、上尺桡关节融合等并发症发生。1例肘关节伸直轻度受限。末次随访时,肘关节屈伸及前臂旋转活动度与健侧比较,差异均无统计学意义( P>0.05)。末次随访时,按Tibone-Stoltz的临床功能评定标准,获优16例,良1例,优良率100%。X线片测量骨折端成角0~12°,平均3.7°;17例均达到解剖复位或近似解剖复位,按Metaizeau等X线片评定标准,获优13例,良4例,复位优良率为100%。 结论经皮克氏针撬拨复位弹性髓内钉固定治疗儿童重度桡骨颈骨折简便、安全、微创、有效、并发症少,是一种理想的治疗方法。
ObjectiveTo assess the effectiveness of percutaneous Kirschner wire poking reduction and elastic stable intramedullary nailing fixation for treating severe displaced radial neck fractures in children. MethodsBetween November 2010 and August 2014, 17 children with severe displaced radial neck fractures were treated with percutaneous Kirschner wire poking reduction and elastic stable intramedullary nailing fixation. There were 13 boys and 4 girls with an average age of 8.7 years (range, 6-14 years). The right side was involved in 9 cases, and the left side was involved in 8 cases. The causes of injury were falling in all cases. The angular deformity at fracture was 64-102° (mean, 84°). According to the Judet classification, 7 cases were classified as grade ⅠVa and 10 cases as grade ⅠVb. The time from injury to operation was 4.2 days (range, 1-7 days). Metaizeau classification and Tibone-Stoltz elbow performance score were used to access the radiological and clinical results, respectively. ResultsThe operation time was 20-50 minutes (mean, 30 minutes). All incisions healed by first intention. The patients were followed up 12-46 months (mean, 20 months). All fractures healed at 2 months after operation. There was no complication of malunion, early epiphyseal closure, avascular necrosis, enlargement of the radial head epiphysis, cubitus varus and valgus deformities, or proximal radioulnar joint synostosis. One case had elbow extension limitation. At last follow-up, the elbow range of motion in flexion, extension, pronation, and supination showed no significant difference between affected side and normal side ( P>0.05). The clinical results were excellent in 16 cases and good in 1 case, with an excellent and good rate of 100%. The angulation was 0-12° (mean, 3.7°) on the X-ray film; anatomic reduction or nearly anatomic reduction was obtained, and the radiological results were excellent in
带旋髂深血管蒂骨膜瓣植入治疗未成年股骨颈骨折术后股骨头缺血性坏死
PEDICLED ILIAC PERIOSTEAL FLAP GRAFT FOR AVASCULAR NECROSIS OF FEMORAL HEAD AFTER FEMORAL NECK FRACTURE IN ADOLESCENTS

,官建中,,周建生,张长春,代秀松,王晓,王照东
- , 2015, DOI: 10.7507/1002-1892.20150059
Abstract: 目的探讨带旋髂深血管蒂骨膜瓣植入治疗未成年股骨颈骨折术后股骨头缺血性坏死(avascular necrosis of femoral head,ANFH)的疗效。 方法2006年12月-2011年8月,采用带旋髂深血管蒂骨膜瓣植入术治疗9例(9髋)未成年股骨颈骨折术后ANFH。其中男6例,女3例;年龄10~18岁,平均14.7岁。骨折原因:交通事故伤5例,高处坠落伤3例,摔伤1例。骨折后3~16 d行克氏针或空心螺钉内固定术,术后10个月内股骨颈骨折均愈合。术后10~42个月,平均24.4个月发生ANFH。骨坏死影像学评估按照Steinberg分期标准:Ⅲb期1例,Ⅲc期2例,Ⅳa期1例,Ⅳb期3例,Ⅳc期2例。根据手术前后髋关节功能Harris评分变化和Steinberg分期改变进行临床评价和影像学评估。 结果术后患者切口均Ⅰ期愈合,无感染、下肢深静脉血栓形成、供区麻木、疼痛及其他手术相关并发症发生。9例均获随访,随访时间38~76个月,平均52个月。患者患髋或膝内上疼痛缓解,肢体无明显短缩,行走步态改善,患髋关节活动度增加。末次随访时,髋关节功能Harris评分为(92.7±9.9)分,与术前(62.8±3.6)分比较差异有统计学意义( t=—12.244, P=0.000);获优5例、良3例、差1例;治疗成功率为88.89%(8/9)。末次随访时,除1例术前Ⅲb期进展至Ⅳb期外,其余患者分期改善或稳定,影像学成功率为88.89%(8/9)。 结论带旋髂深血管蒂骨膜瓣植入治疗未成年股骨颈骨折术后ANFH,能为股骨头提供良好的成骨及血管重建。
ObjectiveTo assess the effectiveness of pedicled iliac periosteal flap graft for treatment of avascular necrosis of the femoral head (ANFH) after femoral neck fracture in adolescents. MethodsBetween December 2006 and August 2011, 9 patients (9 hips) with ANFH after femoral neck fracture were treated with pedicled iliac periosteal flap graft. There were 6 males and 3 females with an average age of 14.7 years (range, 10-18 years). Fractures were caused by traffic accident injury (5 cases), falling injury from height (3 cases), and fall injury (1 case). The time from injury to internal fixation with Kirschner wires or cannulated screws was 3-16 days, and all fractures healed within 10 months after internal fixation. The interval between fracture fixation and ANFH was 10-42 months (mean, 24.4 months). According to Steinberg staging system, 1 hip was classified as stage Ⅲb, 2 hips as stage Ⅲc, 1 hip as stage IVa, 3 hips as stage IVb, and 2 hips as stage IVc. The Harris scores and Steinberg classification were compared between at pre- and post-operation to assess the outcomes clinically and radiologically. ResultsAll incisions healed by first intention. No complications of infection, deep venous thrombosis of lower limb, and pain and numbness of donor site were observed during or after operation. All patients were followed up 38-76 months (mean, 52 months). Joint pain was relieved; no leg length discrepancy was observed; the walking gait was improved and range of motion of hips was increased. The Harris score was significantly increased from 62.8±3.6 at pre-operation to 92.7±9.9 at last follow-up, showing significant difference ( t=-12.244, P=0.000). The hip function was excellent in 5 hips, good in 3 hips, and poor in 1 hip, and the excellent and good rate was 88.89%. Post-operative radiological assessment demonstrated that only 1 hip (stage Ⅲb) had further collapse of the
认知老化中有意控制对自动抑制的调节作用
,谢宁,艳红
心理学报 , 2010,
Abstract: 结合比例控制范式与基于空间位置的返回抑制范式, 探讨了认知老化过程中自上而下的有意认知控制对自动抑制的调节作用。结果表明, 当线索有效率由50%提升至80%时, 两组被试的返回抑制量均下降, 老年组表现为返回抑制消失, 但年轻组出现返回抑制的反转, 表明有意认知控制对自动抑制的调节作用受认知老化的影响而发生衰减。同时文章还就认知老化机制的新兴理论—— 执行衰退假说进行了讨论。
认知老化中有意控制对自动抑制的调节作用
,谢宁,艳红
心理学报 , 2010,
Abstract: ?结合比例控制范式与基于空间位置的返回抑制范式,探讨了认知老化过程中自上而下的有意认知控制对自动抑制的调节作用。结果表明,当线索有效率由50%提升至80%时,两组被试的返回抑制量均下降,老年组表现为返回抑制消失,但年轻组出现返回抑制的反转,表明有意认知控制对自动抑制的调节作用受认知老化的影响而发生衰减。同时文章还就认知老化机制的新兴理论——执行衰退假说进行了讨论。
黑龙江金厂铜金矿床地质特征及控矿因素分析
闫家,
地质论评 , 2013,
Abstract:
黑龙江金厂铜金矿床围岩蚀变特征与成矿期次
闫家,
地质论评 , 2015,
Abstract:
龙葵碱对小鼠睾丸生殖细胞线粒体损伤的研究
季宇彬,,,,,,朗朗
药物评价研究 , 2009,
Abstract: 目的:研究龙葵碱对小鼠睾丸的毒性作用。方法:30只雄性小鼠,体质量20~24 g。随机分成5组,每组6只。采用ip龙葵碱对小鼠进行染毒,染毒剂量分别是1/8 LD50(5.25 mg/kg)、1/4 LD50(10.5 mg/kg)、1/2LD50(21 mg/kg)。另设阴性对照组(生理盐水组),阳性对照组(环磷酰胺,CP,给药剂量40 mg/kg),龙葵碱不同浓度组连续染毒14 d。应用紫外分光光度法测定睾丸中SDH、MDA、SOD、GSH的活力。结果:龙葵碱染毒两周后,GSH的量仅1/2LD50染毒剂量组与空白组相比较呈非常显著性差异(P<0.01);随着染毒剂量的增加, MDA含量增加,1/2 LD50、1/4 LD50、1/8 LD50染毒剂量组与空白组比较呈非常显著性差异(P<0.01);随着染毒剂量的增加SOD的活性降低明显,1/2 LD50、1/4LD50染毒剂量时,SOD活性的降低与空白组比较呈非常显著性差异(P<0.01);随着染毒剂量的增加SDH的活性降低明显,1/2LD50、1/4LD50染毒剂量时,SDH活性的降低与空白组比较呈非常显著性差异(P<0.01)。结论:龙葵碱能够使SDH、MDA、SOD、GSH活力降低,从而导致自由基增多,呼吸链和氧化磷酸化脱偶联,三羧酸循环被阻断,线粒体基质渗透压升高,内膜肿胀,使线粒体的功能发生障碍,线粒体氧化损伤。
昆虫杆状病毒研究和应用的新进展
小锋,兰丽
农业生物技术学报 , 2008,
Abstract: ?杆状病毒是昆虫专一性的病原病毒。自八十年代成功开发了杆状病毒作为外源基因的表达载体系统以来,该技术有了很大发展并得到了广泛应用。近年来杆状病毒除应用于表达系统、生物杀虫剂外,在表面展示系统、作为哺乳动物基因转移的载体、固定外源蛋白质以及作为生物纳米材料等方面都出现了一些新的发展动向。
分布式系统监控资源多目标优化分配
,袁月?,开贵?
计算机科学 , 2014, DOI: 10.11896/j.issn.1002-137X.2014.05.014
Abstract: 针对分布式系统松耦合和动态配置的特点,提出采用监控资源分配进行组件监控周期的选择以达到可靠性保障和资源优化的目的。为了建立监控资源分配模型,首先采用马尔可夫链理论分析了监控策略下的系统可靠性模型;其次分析了监控机制的两种不同代价;再次选择了系统可靠性约束下的多目标监控资源分配模型,它通过最小化监控代价选择恰当的组件监控周期;最后应用遗传算法解决该优化模型。通过实验验证了监控资源分配的必要性和在可靠性优化中的作用,实验表明:监控资源分配能够达到资源优化和可靠性保障的目的;与单目标资源分配相比,多目标分配能够达到更好的优化效果。
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