183 research outputs found

    保留单侧腺体上极甲状腺次全切除术治疗Graves′病的对比分析

    Get PDF
    【目的】评估改良后保留单侧腺体上极的甲状腺次全切除术术式的可行性。【方法】本研究比较了两种甲状腺次全切除术:改良后保留单侧腺体上极术式(Ⅰ组59例)和传统的保留双侧甲状腺背侧组织术式(Ⅱ组54例)的手术时间、出血量、复发率和术后并发症发生率。【结果】两组患者的初次手术时间基本相同,但Ⅰ组患者的失血量、二次手术时间、喉返神经损伤率和复发率均明显低于Ⅱ组。此外,Ⅰ组无术后血肿,Ⅱ组出现3例(5.56%)术后血肿。Ⅰ组2例(3.39%)和Ⅱ组4例(7.40%)出现短暂的低钙血症。【结论】在失血量、二次手术时间、术后并发症发生率、复发率等方面,甲状腺次全切除术中保留单侧腺体上极的术式比保留双侧甲状腺背侧组织术式效果更好

    The Study on key technologies of access control in Heterogeneous wireless network

    Get PDF
    随着无线通信技术不断演进,新型无线接入技术不断出现,快速发展,他们之间相互补充,相互融合。未来移动通信网络的主要特征之一就是异构无线网络共存。未来的移动终端将拥有多个无线接口,业务的提供与网络无关,用户可以自由的选择网络的接入方式。但如何让用户接入最优的网络,较为有效利用全网的资源,成为异构无线网络融合研究领域的热点之一。 在接入控制过程中,为了尽可能的减少接入过程所用时间和选择最优的接入网络,保证用户的无缝接入。在深入的研究之前的一些文献采用的研究方法之后,本文采用了DP(double-predict)方法,首先根据移动终端的运动速度和运动方向预先测定候选网络集合,在确定了候选网络集合之后...With the ongoing evolution of wireless access technologies, new wireless access technologies appear continuously and develop quickly. They complement each other, and mutual integration. The main features of future mobile communication networks are heterogeneous wireless networks coexist. Future mobile terminals will have multiple wireless interfaces, the business has nothing to do with the network...学位:工学硕士院系专业:信息科学与技术学院通信工程系_通信与信息系统学号:2332008115330

    Intermolecular Multiple- Quantum Coherences and Their Applications on Biological Tissues

    Get PDF
    高分辨核磁共振(nuClEAr MAgnETIC rESOnAnCE,nMr)波谱是一种能够在非侵入性状态下获得生物组织分子信息的有效手段。分子间多量子相干(InTErMOlECulAr MulTIPlE-QuAnTuM COHErEnCE,IMQC)信号源于分子间的远程偶极相互作用,仅依赖于偶极相关距离内的磁场相对均匀性,因此可用于在不均匀磁场下获得高分辨的nMr谱。文中简要介绍了IMQC的发展历程及现状,并主要讨论了IMQC方法及其在活体及生物组织中的应用。虽然IMQC目前应用在老鼠身上比较常见,但最近的研究表明IMQC方法已被用于人体小脑的研究,将来IMQC方法将有可能应用于人体的其他器官以及其他的动物研究,具有广阔的发展前景。High resolution nuclear magnetic resonance(NMR) spectroscopy offers an effectively noninvasive method to obtain molecular information in biological tissues.Intermolecular multiple- quantum coherences(iMQCs) originating from distant dipolar interactions between spins just rely on the relative homogeneity of magnetic field within the dipolar correlation distance.Therefore,iMQC can acquire high- resolution NMR spectroscopy in inhomogeneous fields.In this review,the development history and current situation of iMQC were briefly introduced,and the applications of iMQC on in vivo biological tissues were mainly discussed.Although it is more common to apply iMQC in mice /rats,recent investigation indicated that iMQCs can also been used in the study of human cerebellums.In the future,iMQC may be applied to study other organs of human and other animals,indicating that it is a promising method.国家自然科学基金资助项目(项目编号:11105114

    “秤砣虽小压千斤”——解析金属离子在纳米药物自组装中的功能设计

    Get PDF
    目前,化疗的最大障碍是化疗药物在杀死癌细胞的同时对人体正常细胞,尤其是免疫细胞造成损伤.将化疗小分子药物特异性地递送到肿瘤部位,从而提高疗效并降低其毒副作用是亟待解决的现实难题.纳米药物主要由活性药物分子和递送系统(即药物载体)组成,是纳米材料或纳米颗粒在医学中最新发展起来的应用形式.由于其颗粒

    Behavioral performance of time processing in patients with schizophrenia and individuals with schizotypal personality features

    Get PDF
    目的:探讨精神分裂症患者与分裂型人格个体的时间加工行为特征。方法:选取59名符合美国精神障碍诊断与统计手册第4版(DSM-IV)精神分裂症诊断标准的门诊或住院患者,62名通过分裂型人格问卷(SPQ)筛查的分裂型人格个体以及60名健康对照人群。通过时间辨别任务、时间产生任务、时间复制任务对3组被试的时间加工能力进行测查。结果:时间产生任务中,分裂型人格组的准确性得分大于健康对照组[(1.03±0.07)vs.(0.99±0.09),P<0.05],精神分裂症组的变异系数大于健康对照组和分裂型人格组[(0.26±0.10)vs.(0.20±0.05),(0.20±0.05);均P<0.01];时间复制任务中,精神分裂症组的变异系数大于健康对照组和分裂型人格组[(0.21±0.11)vs.(0.15±0.07),(0.17±0.12);均P<0.01)。结论:精神分裂症患者和分裂型人格个体都存在时间加工表现上的缺损,其中精神分裂症患者的缺损可能更为严重。Objective: Schizophrenia is associated with time-processing impairments. However, very little is known about this type of problem in at-risk individuals with schizotypal personality disorder (SPD) features. The current study compared time-processing performance in patients with schizophrenia, individuals with SPD features, and healthy controls. Methods: A number of tasks capturing time discrimination, time production and time reproduction as well as other related abilities were administered to 59 schizophrenia patients, 62 individuals with SPD fea- tures, and 60 healthy controls. The diagnosis was made according to the Diagnostic and Statistical Manual of Mental Disorders-IV, Fourth Edition (DSM-IV) criteria. In analyzing the time-processing data, repeated measures were a- dopted, with group as a between-subjects variable, duration of time as a within-subjects variable, time threshold in time discrimination, accuracy (estimated time/standard time) and coefficient of variation (SD of estimated time/ mean of estimated time) of time production and time reproduction as dependent variables. Results: The result showed that patients with schizophrenia, SPD individuals and healthy controls had similar time discrimination threshold (P 〉 0. 05). In the time production task, SPD individuals had higher accuracy score than healthy controls [ ( 1.03 ±0. 07) vs. (0. 99± 0. 09), P 〈 0. 05 ], while patients with schizophrenia had higher coefficient of variation as compared to individuals with SPD features and healthy volunteers[(0. 26 ±0. 10) vs. (0. 20 ±0. 05), (0. 20 ± 0. 05) ; Ps 〈 0. 01]. In the time reproduction task, patients with schizophrenia also scored higher on the coefficient of variation than SPD individuals and healthy controls[ (0.21 ± 0. 11) vs. (0. 15± 0.07), (0. 17 ±0. 12); Ps 〈0. 01]. Conclusion: The current findings suggest that both SPD individuals and patients with schizophrenia may have impairments on time processing. The impairments of patients with schizophrenia may be more severe than that of SPD individuals

    γ谷氨酰胺转移酶与 Framingham 危险评分的相关性分析

    Get PDF
    【目的】γ谷氨酰胺转移酶(GGT)近年来被发现与动脉粥样硬化及冠心病相关,本研究旨在探讨血清GGT水平与十年心脏病危险评分——Framingham危险评分(FRS)之间的相关性,以期能更早期发现心血管疾病的中高危患者。【方法】本研究入组了9544名40岁及以上的广州社区居民,均来自于一项基于广州社区居民的横断面流行病学研究。GGT根据四分位数分组:Q1<15U/L(n=2407例)、Q215~19.9U/L(n=2302例)、Q320~28.9U/L(n=2442例)、Q4≥29U/L(n=2393例)。GGT与十年心血管疾病中高危风险(FRS≥10%)进行Logistic多重回归分析。【结果】相对于GGT最低四分位数组,随着GGT水平升高,FRS≥10%的比例增高(P<0.01),这种相关关系在校正了混杂因素后仍然存在,最高四分位数组的风险是最低四分位数组的1.72倍(95%置信区间1.28-2.29)。【结论】γ谷氨酰胺转移酶与十年心脏病危险评分FRS存在相关关系,建议常规体检早期重视GGT,有利于早期评估及干预心血管疾病中高危人群

    国内首例宫颈癌自体卵巢组织冻存移植成功妊娠

    Get PDF
    目的探讨卵巢组织冻存及自体移植手术保护子宫颈癌患者生育力与卵巢内分泌功能的疗效。方法对1例26岁子宫颈癌ⅡA1期患者在癌症手术过程中进行卵巢组织取材、冻存,待其癌症完全缓解后进行冻存卵巢组织自体移植手术,随访监测患者的绝经相关症状、激素水平及卵泡发育情况。结果卵巢组织移植第6个月卵泡刺激素降低至6.60 U/L,雌二醇由<10.00 ng/L升高至89.00 ng/L。移植第10个月,B超监测到移植卵巢组织有卵泡发育且能完成生理排卵功能。移植第15个月,卵泡刺激素维持在7.24 U/L,雌二醇水平升至368.00 ng/L。移植2年余,患者通过辅助生殖技术成功诞下了一名健康的婴儿。结论冻存卵巢组织移植后卵巢恢复内分泌功能及排卵功能,并成功妊娠,证明卵巢组织在临床上移植成功

    公路施工中影响路面平整度的因素及应对措施

    No full text
    随着中国经济科技的发展,中国各地也出现了各种各样的公路,但是公路的建设发展需要紧跟时代发展的脚步,需要建设更高质量的公路。建设一条高质量的公路不仅能让人们在行车途中体会到舒适,还能够增加公路的使用寿命,在一定程度上节省国家财政的支出。所以,公路建设者需要在工程建设的过程中总结经验教训,提高自己的能力和建设公路的质量。提高公路路面的平整度是提高公路质量的至关重要的一方面,这就有利于一条高质量公路的建设。</jats:p
    corecore