15 research outputs found

    Design of Baosteel Fivecold-Rolled Factory’s Power Quality Inspection System

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    随着非线性负荷及冲击性负荷的增加,电能质量严重超标,正在大范围地污染供电环境,危及电网及其供电设备的安全稳定运行,降低电力企业的经济效益,因此有必要对电能质量进行实时在线监测,及时了解电网电能质量水平,以便采取措施改善﹑提高供电质量。作者设计了宝钢五冷轧厂电能质量监测系统,针对目前存在的高次谐波问题,对电能质量参数进行长期监测和分析,文章着重介绍了该系统的原理﹑结构﹑功能设计及系统的实现

    Delay-Constrained Mobile Energy Charging in Wireless Sensor Networks

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    为了延长无线传感网的生存期,基于可充电的移动设备,研究设计了一种无线传感网中移动式能量补充的方法,移动节点可以在为传感器节点补充能量的同时收集数; 据.首先,通过将无线传感器网络监测区域分割为大小相同的子区域,该子区域内的节点组成一个簇;其次,以一个簇内的总能量为计算依据,设计移动节点的路径; 生成算法以确定能量高效的移动路线;最后,使用10种不同的随机网络拓扑图进行了仿真实验,以节点移动速度和时延为限制条件分别得到了对比数据.结果表明; ,本文提出的算法与NJNP( nearest-job-next with preemption)算法相比在时延相同的条件下( 800; s),生存期提升了6 000 s左右,在节点速度5 m/s条件下生存期提升了将近14 000; s.证明本文所提方法有效地提高了充电效率,延长了网络的生存期,可用于大规模的无线传感器网络.In order to prolong the lifetime of wireless sensor networks by using; energy-rechargeable mobile devices,this paper designs a mobile energy; replenishment method wherein a mobile element gathers data and recharges; sensors simultaneously. Firstly,the whole sensor network is divided into; several sub-regions equally and the sensors in each sub-region are; formed into a cluster. Secondly, considering the energy in a whole; cluster,the mobility path is designed to find the energy-efficient; mobile trace of the mobile element. Finally,in the simulation; experiment,we used ten different random network topologies to show the; comparisons with extensive simulation experiments under different; velocities and deadlines. The results indicate that the proposed; algorithm increases lifetime by approximately 6 000 s compared with; Nearest-Job-Next with Pre-emption( NJNP) under the deadline of 800 s.; Moreover,the proposed algorithm increases lifetime by approximately 14; 000 s compared with NJNP at velocity of 5 m/s. Thus,the proposed; algorithm can improve recharging efficiency and prolong the lifetime of; wireless sensor networks,which can be used in large-scale sensor; networks.国家自然科学基金资助项目; 福建省高等学校杰出青年科研人才培育计划资助项

    肾移植术后淋巴漏及淋巴囊肿的诊治

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    [目的] 探讨肾移植术后淋巴漏或淋巴囊肿的诊断及治疗方法。[方法]回顾性分析21例肾移植术后淋巴漏(或囊肿)患者1,对淋巴漏或囊肿的可能原因进行探讨并通过引流液生化检查、乳靡试验和B超检查,分为非手术治疗和手术治疗。对诊断和治疗方法进行总结。[结果]21例中,17例为淋巴漏,4例为淋巴囊肿。6例单纯引流后治愈;15例经引流管注入无水酒精;其中9例治愈.6例治疗无效,最后经开放手术治愈。本组病例中,3例淋巴漏伴有感染,1例淋巴漏伴有移植肾急性排斥.经抗排斥治疗好转,淋巴漏治愈。[结论]肾移植术后淋巴漏或淋巴囊肿多与手术操作欠仔细或术中漏扎小淋巴管有关;多数病人可经非手术治疗痊愈,少数病人尤其淋巴囊肿形成者需开放手术治疗

    Physiological responses of calcifying and non-calcifying coccolithophore strains to seawater acidification and UV radiation

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    颗石藻(Coccolithophore)是定鞭藻门(Haptophyta)所有在特定生活史中具有钙质外壳(颗石,coccolith)的浮游植物的统称。颗石藻能通过光合作用固定CO2,也能通过钙化作用释放CO2,因此在海洋碳循环中发挥举足轻重的作用。在自然环境中,颗石藻遭受着多种环境变化带来的影响。已有大量文献表明,大气CO2浓度升高引起的海洋酸化(OA)、阳光紫外辐射(UVR)等影响颗石藻的光合与钙化作用。然而,所报道的结果,不确定性大,且需要机制性的解析。为此,本文采用同一品系钙化与非钙化颗石藻(大洋桥石藻,Gephyrocapsaoceanica,NIES-1318),研究了其在单一或叠加...Coccolithophores belong to the phylum Haptophyta and are unicellular calcifying microalgae that not only fix carbon into biomass through photosynthesis but also assimilate carbon into calcite through calcification. Therefore they play a particularly important role in the global carbon cycle. In their natural environment, coccolithophores are subjected to aspects of global change such as increasing...学位:理学硕士院系专业:海洋与地球学院_海洋生物学学号:2232014115135

    Blood pressure remote real-time monitoring system based on Android platform

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    本实用新型公开了一种基于Android平台的血压远程实时监控系统,包括血压测量仪,Android平台、与Android平台连接的服务器以及分别在Android平台和服务器上运行的数据处理单元,还包括与血压测量仪相连的第一无线数据收发器,以及与Android平台连接的第二无线数据收发器,所述第一无线数据收发器与所述第二无线数据收发器信号连接。本实用新型在安装Android平台的终端上安装无线数据采集器,通过互联网与远程的服务器连接,实现交互,达到预订的数据传输功能。进而解决了医护人员实时获取病人血压的相关信息,达到了远程医疗的结果。同时本实用新型自动化程度高,操作简单,占用资源少,功耗低

    Optical characteristics analysis of grating light valve and application in thermal CTP system

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    四种细胞因子组合从小鼠骨髓细胞体外诱导优势不成熟CD8a+DC

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    【目的】探索从小鼠骨髓细胞体外诱导大量优势不成熟CD8a+DC(DC2)的新方法。方法:取小鼠骨髓细胞,采用GM-CSF 5ng/ml,IL-4 20ng/ml,Flt3L 25ng/ml,SCF 100ng/ml四种细胞因子组合,37℃,5%CO2体外培养诱导。第3、7、16天流式细胞术4色荧光标记法分析细胞表型,细胞计数分析总细胞产量,采用电镜、免疫荧光及相差摄影观察细胞形态。【结果】小鼠骨髓细胞经GM-CSF+ IL-4+Flt3L+SCF 诱导第3天在CD11c+的DC细胞群中可产生97.09%的CD8a+优势DC2细胞(占总细胞的34.6%),其中CD8a+MHCⅡ-的不成熟DC占61.77%;随培养时间延长比例下降,但培养第16天时CD8a+的不成熟DC仍占优势。总细胞计数分析显示随培养时间延长,细胞总数下降。电镜、免疫荧光及相差摄影等形态学检查显示所诱导的DC呈现典型树突状形态特征。【结论】GM-CSF+ IL-4+ Flt3L+SCF可以体外快速诱导小鼠骨髓细胞产生大量优势不成熟CD8a+ DC,是体外制备不成熟DC2的一种较好的新方法

    Surgical Treatment for Unstable Distal Clavicle Fracture with Micromovable and Anatomical Acromioclavicular Plate

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    Eleventh Five-Year scientific research Project of Nanjing Military Region [06NA100]Between 2006 and 2009, 18 patients of distal clavicle fracture were treated with micro-movable and anatomical acromioclavicular plate (MAAP) in our department. According to the Neer's classification, all cases were unstable with type IIA (12 cases) and type IIB (6 cases). Functional outcome was evaluated using the Karlsson's criteria. The mean follow-up was 18 months (range, 12-36months). No postoperative plate screws complication was observed. Osseous union could be achieved at a mean time of 12 weeks after operation in 18 patients (range, 8 - 16 weeks). According to Karlsson's criteria, radiographic appearances and postoperative shoulder functional recovery revealed a good and excellent rate in these cases. We conclude that surgical treatment using MAAP seems to be a good option for unstable type II fractures of the distal clavicle. This technique allows for reliable fixation with early functional exercises and functional recovery

    Clinical Effect of Acute Complete Acromioclavicular Joint Dislocation Treated with Micro-Movable and Anatomical Acromioclavicular Plate

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    Eleventh Five-Year scientific research Project of Nanjing Military Region [06NA100]Objectives: We evaluated the long-term clinical results of acute complete acromioclavicular dislocations treated with micro-movable and anatomical acromioclavicular plate. Methods: Open reduction and internal fixation was performed using the MAAP in 16 patients (10 males, 6 females; mean age 36 years; range 16 to 63 years) with acute complete acromioclavicular joint dislocation. Radiographic evaluations were routinely conducted every 3 weeks until 3 months postoperatively. The MAAP were removed under local anesthesia after 3 months postoperatively. We evaluated the functional results by using the constant scoring system and radiological results in the last follow-up time. The mean follow up was 26 months (range 16 to 38 months). Results: The mean Constant score was 94 (range, 78 to 100). The results were excellent in 12 patients (75.0%), good in 3 patients (18.8%) and satisfactory in 1 patient (6.2%). Three patients with scores of 80 to 90 had mild pain during activity, but have not affected the shoulder range of motion. One patient has both some pain and limited range of motion of shoulder joint. All patients but one have returned to their preoperative work without any limitations. Compared to the contralateral side, radiography showed anatomical reposition in the vertical plane in 14 cases, slight loss of reduction in 2 older patients. Conclusion: We recommend the MAAP fixation for surgical treatment of acute complete acromioclavicular joint dislocation as it could provide satisfactory shoulder functions and clinical results, with lower complication rate. However, it is necessary to continue to observe the clinical effects of this fixation technique

    磁悬液自动搅拌输送机

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    本实用新型属于机械自动化工程领域,具体地说是一种磁悬液自动搅拌输送机,包括超声波液位传感器、输送水泵、搅拌桶、搅拌机构及防水电机,防水电机安装于搅拌桶的底面,防水电机的输出端与搅拌机构相连,搅拌桶内盛装有磁悬液溶液,搅拌机构及防水电机均浸没在磁悬液溶液液面以下,防水电机驱动搅拌机构旋转,通过搅拌机构对磁悬液溶液进行搅拌;搅拌桶的侧壁顶部安装有用于监控磁悬液溶液液面高低的超声波液位传感器,输送水泵可拆卸地安装在搅拌桶的侧壁上,输送水泵的底部浸没在磁悬液溶液液面以下。本实用新型具有结构简单,功率高效,转速连续可调,可实现自主输送及自主预警等特点
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