11 research outputs found

    Design and manufacture of array sphygmology sensor

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    提出了一种用微机电系统(MEMS)技术应变传感器阵列探头客观细腻地采集人体脉象的新思路。探头采用直接腐蚀出电阻条的技术,具有工艺简单、成本低廉、电阻变化率高、工作可靠等优点。对设计进行了理论计算和优化,并用有限元分析软件ANSYS8.0进行了结构和电耦合场仿真,模拟悬臂梁端点位移对电阻变化的影响。当悬臂梁末端位移变化为50μm时,电阻变化率模拟结果为18.84%,与理论计算值19.67%符合得很好。For acquiring more comprehensive information of pulse conditions,a probe of pulse symbol instrument designed by MEMS technology has been presented,the method of direct etching of silicon is utilized to form the resistor.The process is simple,economical,and it has high change rate of resistor,working reliability.After theory calculation,the coupled-field analyses between the structural and electric fields are carried out by finite element analysis software ANSYS 8.0.It simulates the change of resistor with the displacement of cantilever tip.When the tip of cantilever displaces 50μm,the modulation result is 18.84%,and is in good agreement with the calculation result of 19.67%

    Probe Design of Arrayed Sphygmology Instrument

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    提出了一种用微机电系统技术(MEMS)应变传感器阵列探头客观细腻地采集人体脉象的新思路。探头采用直接腐蚀出电阻条的技术,具有工艺简单、成本低廉、电阻变化率高、工作可靠等优点。对设计进行了理论计算和优化,并用有限元分析软件ANSYS8.0进行了结构和电耦合场仿真,模拟悬臂梁端点位移对电阻变化的影响。当悬臂梁末端位移变化为50μm时,电阻变化率模拟结果为18.84%,与理论计算值19.67%符合得很好。For acquiring more comprehensive information of pulse conditions,a probe of pulse symbol instrument designed by MEMS technology was presented. It utilizes the method of direct etching of silicon to form the resistor. The processes are simple and economical,and the change of resistor highly sensitive,with high reliability. The coupled-field analyses between the structural and electric fields are carried out by finite element analysis software ANSYS8.0. The change of resistor with the displacement of cantilever tip is simulated. When the tip of cantilever displaces 50 μm,the modulation result 18.84% is in good agreement with the calculation result 19.67%. It presents a new way to design and fabricate the sensor used for sphygmology

    一种棕囊藻的形态特征与毒素分析

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    于1997年11月,在广东省汕头地区饶平县海面采集棕囊藻,采用显微观察和光谱分析方法,进行形态特征与毒素结构的研究。结果表明,该种藻具有两种不同的藻体形态:一种是不运动的球形群体(直径0.1一3cm),外具胶质被,群体内的细胞有近千至数万个,每个细胞(直径3-7.5μm)有2-3个黄褐色的叶绿体;另一种是游动的单细胞,具有两根几乎等长的鞭毛和一根短的定鞭丝(也称为附着鞭毛或触丝),常呈球形。将反复冻融或冷冻干燥的藻细胞经有机溶剂提取,用新鲜牛血球测定显示出具有强的溶血毒素特性。溶血毒素经硅胶柱层析纯化,

    乌鲁木齐区域环境容载力与城市污染控制对策研究

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    该项目以环境容量和环境容载力理论为基础,综合评价乌鲁木齐区域自然环境-城市环境容载力的总量和分量,研究乌鲁木齐区域环境容载力持续利用与城市污染控制对策;设计评判模型群、预测模型群、决策模型群的建立和优化方案,以揭示该区环境容载力与城市污染控制之间的复杂关系和动态发展规律;用SAS、SPSS等系统分析软件,对乌鲁木齐区域环境容载力区划与城市污染控制对策进行信息、图形处理和应用研究,以增强区域环境与城市污染控制对策研究的可操作性和科学性

    2006-2010年乌鲁木齐市伤害监测结果分析/Analysis on injury surveillance in Urumqi, 2006-2010[J]

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    [目的]掌握乌鲁木齐市伤害的流行特征,为制订伤害预防与控制措施提供科学依据.[方法]在乌鲁木齐市选择三级甲等医院1家,二级医院2家,作为伤害监测哨点医院,所有在哨点医院就诊的首诊伤害患者为监测对象.[结果]伤害发生前5位原因依次为跌倒/坠落(38.92%),机动车车祸(18.11%),钝器伤(14.93%),刀/锐器伤(12.00%),其他(4.68%);伤害性质以挫伤/擦伤(40.43%)为主,其次为骨折(21.53%),和锐器伤/咬伤/开放伤(15.52%);伤害发生地点主要是公路/街道(30.28%),其次是家中(21.90%)和公共居住场所(21.29%);以休闲活动时发生伤害为主(62.54%);非故意伤害占81.70%;50.42%的伤害病例经治疗后回家,观察/住院和死亡分别占47.95%和0.29%.[结论]乌鲁木齐市0~14岁和65岁以上居民伤害以跌落为主,男性青壮年以交通事故伤害为主.提高中小学生和老年人的安全防范意识,完善交通安全管理,培养良好的交通安全行为是主要的预防措施

    玛纳斯河产流区温度、降水及径流变化特征分析[C]

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    近几十年以来气候变暖已经引起了诸如大气中水汽含量增加、降水类型、降水集中程度、极端降水、雪盖面积减少、大范围的山区冰川融化退缩、土壤水和径流等大尺度水文循环的变化。西北干旱区因全球气候变暖引起的冰川消融的增加,区域降水量的变化对河流径流影响也引起了广泛关注,实测资料表明:1980s后新疆也表现出气温升高、降水增多、山地冰川退缩、河川径流增加、湖泊水位上升面积扩大、沙尘日数减少、水面蒸发量减少、生态环境得到改善等趋势。玛纳斯河发源于天山北麓,准噶尔盆地南缘,汇集清水河等支流流入玛纳斯-石河子绿洲,最后消失于荒漠。玛纳斯河是天山中麓最大的内流河,径流成分以高山降水补给为主,融雪径流、降雨径流等多种径流成分并存

    覆膜对绿洲棉田土壤CO2通量和CO2浓度的影响/Effects of plastic film mulching on soil CO2 effiux and CO2 concentration in an oasis cotton field[J]

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    基于静态箱法和气井法分别测定新疆棉田覆膜位置的土壤CO2通量和CO2浓度.结果表明:土壤CO2通量和CO2浓度时间变化特征与土壤温度变化趋势一致,均表现为7月较高,10月最低.观测期内,棉田土壤CO2累积排放量非覆膜处理为2032.81 kg C·hm-2,覆膜处理为1871.95 kg C·hm-2;而1 m深度内土壤CO2浓度非覆膜处理为2165~23986 μL·L-1,覆膜处理为5137~25945 μL·L-1,即覆膜减少了棉田土壤排放CO2的同时增加了土壤CO2积累量.覆膜和非覆膜处理下不同深度土壤CO2浓度和CO2通量的相关系数分别为0.60~0.73和0.57~0.75,表明地表释放的CO2强烈依赖于土壤剖面储存的CO2.覆膜和非覆膜处理下Q10值分别为2.77和2.48,表明覆膜处理下的土壤CO2通量对土壤温度变化的响应更敏感

    天山托木尔大峡谷野生观赏植物资源及其评价/Evaluation of Wild Ornamental Plant Resources in Tomur Grand Canyon of Tianshan Mountain[J]

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    托木尔大峡谷位于新疆天山南坡中段的温宿县境内,具有丰富的野生观赏植物资源,开发利用潜力大。采用层次分析法,对当地131种野生植物的12个评价指标体系进行分析。评价结果表明:景观功能评价高的植物Ⅰ级(>3.2),共有14科16属18种;Ⅱ级(3.2~2.74),共有23科53属60种;Ⅲ级(2.74~2.23),共有14科29属41种;Ⅳ级(2.23~1.74),共有5科12属13种

    JUNO Sensitivity on Proton Decay pνˉK+p\to \bar\nu K^+ Searches

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    The Jiangmen Underground Neutrino Observatory (JUNO) is a large liquid scintillator detector designed to explore many topics in fundamental physics. In this paper, the potential on searching for proton decay in pνˉK+p\to \bar\nu K^+ mode with JUNO is investigated.The kaon and its decay particles feature a clear three-fold coincidence signature that results in a high efficiency for identification. Moreover, the excellent energy resolution of JUNO permits to suppress the sizable background caused by other delayed signals. Based on these advantages, the detection efficiency for the proton decay via pνˉK+p\to \bar\nu K^+ is 36.9% with a background level of 0.2 events after 10 years of data taking. The estimated sensitivity based on 200 kton-years exposure is 9.6×10339.6 \times 10^{33} years, competitive with the current best limits on the proton lifetime in this channel

    JUNO sensitivity on proton decay pνK+p → νK^{+} searches

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