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1.
This paper reports on the electromagnetic effects on the biological tissue surrounding a transcutaneous transformer for an
artificial anal sphincter. The coupling coils and human tissues, including the skin, fat, muscle, liver, and blood, were considered.
Specific absorption rate (SAR) and current density were analyzed by a finite-length solenoid model. First, SAR and current
density as a function of frequency (10–107 Hz) for an emission current of 1.5 A were calculated under different tissue thickness. Then relations between SAR, current
density, and five types of tissues under each frequency were deduced. As a result, both the SAR and current density were below
the basic restrictions of the International Commission on Non-Ionizing Radiation Protection (ICNIRP). The results show that
the analysis of these data is very important for developing the artificial anal sphincter system. 相似文献
2.
吴晓 《常熟理工学院学报》2009,23(10):84-88
中引式气力输送系统具有独立、串联和远近距离均适应的优点．通过实验研究,探讨了中引式气力输送系统的流动模式、管道阻力特性和输送压力频谱特性等．实验结果表明,中引式气力输送随着操作气速的变化,管内灰栓的流动模式也相应发生变化,分别为：柱塞流、栓流和悬浮流;柱塞流压力频谱较小,灰栓、气栓相间的多栓流属基本稳定流动;栓流压力频谱振幅最大,易成为独栓,属不稳定流动,输送量与柱塞流相当;悬浮流压力频谱最低,属稳定流动,输送量最低,输送速度最快,管道易磨损．柱塞流、栓流及悬浮流模式,对于给定物料操作气速与输送平均压力之间随着操作气速增加,输送压力逐渐下降． 相似文献
3.
液压挖掘机故障诊断专家系统的设计 总被引：1，自引：0，他引：1
近年来,为了满足复杂系统的诊断要求,诊断技术已开始进入一个新的阶段,即智能化诊断阶段。这是一种基于专家知识和人工智能技术的诊断方法。通过专家系统和神经网络两种方法对故障诊断进行了研究。应用人工智能理论,开发了液压挖掘机的故障诊断专家系统。对液压挖掘机的故障原理进行了全面的分析,建立了故障知识库,实现了实时状态监测和故障诊断。 相似文献
4.
张笑 《天津职业院校联合学报》2020,(2):49-52
随着人工智能技术在会计领域的广泛应用,人工智能方法与工具已经沁入会计行业,改变了传统会计的要素、假设、职能和会计关系,会计传统工作逐渐被人工智能机器人替代,会计工作重心和对会计人才的需求也都在发生改变,这让会计人员面临着前所未有的压力。因此,高职院校对会计课程也需要进行相应的调整,以适应不断发展的时代。 相似文献
5.
为探讨肠淋巴液对肠系膜上动脉闭塞性休克(SMAO休克)的影响,对SMAO休克大鼠给予肠淋巴液或血浆治疗,并以生理盐水作对照,观察其对血压及存活率的影响。结果表明,开夹后90min起,肠淋巴液治疗组的血压显著高于对照组(P<0.05),其4h存活率也显著优于对照组(P<0.05),而血浆组与对照组血压和存活率未见统计学差异(P>0.05),提示肠淋巴液对SMAO休克具有提升血压及延长存活时间的作用。 相似文献
6.
Romano AM 《The Journal of perinatal education》2007,16(2):47-50
In this column, the author summarizes four research studies that further support the benefits of normal birth. The topics of the studies include the optimality of midwifery care for pregnant women at moderate risk; obstetric care practices associated with anal sphincter tears in vaginal births; the effect of acupuncture treatment on women with prelabor rupture of membranes at term; and women's ability to adapt to early labor. 相似文献
7.
The contamination diffusion to the operating room when the door is open was simulated with a computational fluid dynamic (CFD) method,to give the extent of the contamination diffusion.The influence of the door-opening procedure was ignored since the door of the operating room is normally a sliding one.The flow field in the case of the 16 s course of opening the door was simulated.The simulated and the experimental results demonstrate that the extent of the contamination diffusion is around 1.5 m when there is no temperature difference between indoor and outdoor,and there is hardly any contamination diffusion when the temperature difference is 1 ℃.It can be concluded that the positive pressure difference in the operating room lost its function in preventing the contamination when the door is open.That the temperature of corridor is lower than that of operating room contributes to contamination control.Keeping 1 ℃ temperature difference between corridor and operating room and increasing positive pressure and air flow are suggested.It is more secure to set up an anteroom if persons come in or out of the operation room at the course of surgery. 相似文献
8.
建立了一个含心脏循环、冠状循环、肺循环和体循环四个基本结构的循环系统的血流动力学仿真模型。模型可以仿真正常及心衰情况下血液循环系统的血流动力学现象,得到正常及心衰情况下心脏的压力-容积曲线、冠脉血流波形、循环系统中各处的血压、血流量波形等表征血流动力学状况的重要曲线,还可仿真心脏的颈动脉窦神经活动与交感神经及迷走神经的调控机制。仿真结果与生理实际情况相符合。 相似文献
9.
血压测量方法是高等护理专业实验教学的重点内容之一,也是临床上诊断疾病,观察治疗效果的重要依据。从血压测量原理出发,介绍了血压测量的规范方法,分析实验教学和临床工作中血压测量的常见技术偏差;探讨了纠正措施和血压测量的质量控制,以提高实验教学效果。 相似文献
10.
A cold-model vertical multi-tube circulating fluidized bed evaporator was designed and built to conduct a visualization study on the pressure drop of a liquid-solid two-phase flow and the corresponding particle distribution.Water and polyformaldehyde particle (POM) were used as the liquid and solid phases,respectively.The effects of operating parameters such as the amount of added particles,circulating flow rate,and particle size were systematically investigated.The results showed that the addition of the particles increased the pressure drop in the vertical tube bundle.The maximum pressure drop ratios were18.65%,21.15%,18.00%,and 21.15%within the experimental range of the amount of added particles for POM1,POM2,POM3,and POM4,respectively.The pressure drop ratio basically decreased with the increase in the circulating flow rate but fluctuated with the increase in the amount of added particles and particle size.The difference in pressure drop ratio decreased with the increase in the circulating flow rate.As the amount of added particles increased,the difference in pressure drop ratio fluctuated at low circulating flow rate but basically decreased at high circulating flow rate.The pressure drop in the vertical tube bundle accounted for about 70%of the overall pressure drop in the up-flow heating chamber and was the main component of the overall pressure within the experimental range.Three-dimensional phase diagrams were established to display the variation ranges of the pressure drop and pressure drop ratio in the vertical tube bundle corresponding to the operating parameters.The research results can provide some reference for the application of the fluidized bed heat transfer technology in the industry. 相似文献
11.
从维纳—斯托克斯方程的一般形式出发对泊肃叶公式进行推导,证明该公式的适用条件是:牛顿液体在水平均匀直管道中作定常流动,管两端的压强差恒定,作用在流体上的体积力可以忽略。并运用泊肃叶公式对人体心血管系统中各段血管的流阻、血压及影响动脉血压的因素进行了定性的分析。 相似文献
12.
You-shi LIU You-hong FANG Ling-xiang RUAN You-ming LI Lin LI Ling-ling JIANG 《Journal of Zhejiang University. Science. B》2009,10(8)
Takayasu's arteritis (TA), also known as the "pulseless disease," is a chronic vasculitis of the aorta and aortic branches. TA with Crohn's disease is rare and has not been documented in China before. In this paper we report on a case of Takayasu's arteritis associated with concurrent Crohn's disease. A 17-year-old Chinese male developed upper limb sourness and a sensation of fatigue, and his upper limb pulses were absent. He was diagnosed with TA and underwent an axillary artery bypass with autolo-gous great saphenous vein on the left subclavian artery. After the surgery, he regained the normal blood pressure. This patient also had years of diarrhea and developed an anal canal ulcer, and was diagnosed with inflammatory bowel disease and ulcerative colitis before. Five months after the TA surgery, he was hospitalized for severe stomachache and diarrhea and was finally diagnosed with Crohn's disease. The possible pathophysiological mechanisms responsible for concurrent existence of TA and Crohn's disease may be associated with immune disorders, especially autoimmunity. 相似文献
13.
YAN Jian-hua PENG Zheng LU Sheng-yong LI Xiao-dong CEN Ke-fa 《浙江大学学报(A卷英文版)》2006,7(11):1896-1903
INTRODUCTION Polychlorinated dibenzodioxins and poly- chlorinated dibenzofurans (PCDDs/Fs) are some major toxic substances unintentionally produced mainly from municipal solid waste incineration (MSWI). Attention has been focused on the best way for controlling and regulating such emissions. Among flue gas treatment technologies for post combustion zone emission control (Buekens and Huang, 1998; McKay, 2002), activated carbon adsorption (ACA) and techniques involving physical adsorp… 相似文献
14.
陈建宁 《临沂师范学院学报》2009,31(2):91-94
科技的飞速发展促进了人工生育技术的进步,它的广泛应用对解决人类不育问题具有积极意义。同时对人类传统的生育观念乃至家庭关系的维系提出了挑战,并使得经这项技术生育的子女的法律地位变得扑朔迷离。运用亲子关系的种类、区别以及生育权的主体、性质等理论分析同质人工生育子女、异质人工生育子女的亲子关系性质和法律地位,并考查我国在人工生育子女法律规定方面的不足,可为我国加强对人工生育子女法律地位提出立法建议。 相似文献
15.
我国高等学校生均成本变动分析 总被引：10，自引：0，他引：10
根据1952～2002年我国高等学校生均运行成本的数据,可以发现:按当年价格计算的生均成本快速增加,但按不变价格计算的生均成本缓慢提高;生均成本在短期内波动很大;预算外收入的比例越来越高;人员成本比例相对稳定。运用高等学校生均成本模型并结合我国的高等教育改革与发展的背景,对高等学校生均成本进行分析,可以发现:改革开放以来,我国高等学校实际生均成本在缓慢增加,学校规模的扩大和生师比的提高,减缓了生均成本的上升;生均成本年度之间波动很大,原因在于学校收入的波动;伴随高等教育财政体制的改革,预算外收入占成本的比重迅速提高;由于高等教育技术变化不大,高等学校运行成本中人员成本的比例长期基本稳定。 相似文献
16.
牟来彦 《广东教育学院学报》2008,28(3):79-82
神经网络作为人工智能的一个分支,已在众多领域得到成功运用,把它用在教学领域还是一个新的尝试．结合多元智能理论,以学生的多元智能光谱为处理对象,建立了一个BP神经网络,利用LM算法和MATLAB语言,通过网络训练,得到了一种学生素质的处理方法． 相似文献
17.
采用急性实验观察法 ,取家兔 1 8只 ,平均分成 3组。分别用 1 0 %、35 %、和 5 0 %的白酒处理 ,每个处理分为 2 0mL和 40mL剂量 ,观察白酒对减压神经放电及血压的影响。结果表明 1 0 %白酒处理 ,2 0mL和 40mL可引起血压先升高后略降 ;35 %和 5 0 %处理可引起血压明显降低。白酒引起心率明显减慢 ,减压神经放电与血压变化呈负相关。 相似文献
18.
19.
高血压治疗的现状与展望 总被引：1，自引：0，他引：1
高血压病是全球范围内最常见的心血管系统疾病，是严重危害人们健康的疾病之一、目前高血压治疗仍然沿用传统的治疗方法，然而随着对高血压病发病机制研究的深入和各种新的抗高血压药物的研制和问世，对高血压的治疗思路和方法提出了新的挑战，故现阶段提出了在高血压个体化治疗的基础上同时从确切降压、稳定血压和阻断肾素-血管紧张素系统三方面进行治疗的新概念、从这三方面具体阐述了高血压新的治疗思路和方法． 相似文献
20.
介绍了实际应用于农作物灌溉的控制系统,根据输水管中的压力变化,利用PLC中的PID模块调节变频器的运转频率,从而控制水泵的流量,达到恒压供水的目的。本系统具有省时、省水、省电的优点,并能减少操作人员,大大降低运行成本。 相似文献