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通过对每年实施的农村低压电网改造中出现问题进行分析,提出解决办法,从而确保今后的农村低电压电网改造工程顺利实施. 相似文献
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Objective: To investigate changes in magnetic resonance spectroscopy (MRS) of lentiform nucleus during the early stage of Parkinson's disease. Methods: Twenty-five patients with idiopathic Parkinson disease with unilateral symptoms (IPDUS) and 25 healthy volunteers were enrolled in this study. MRS of the lentiform nucleus in each patient was taken and then concentrations of N-acetylaspartate (NAA), Creatine (Cr) and Choline (Cho) were calculated. Results: Compared to that in the control, NAA/(Cho Cr) was significantly lower in the lentiform nucleus contralateral to symptoms and even that in the ipsilateral side in IPDUS patients (all P＜0.05); while there was no difference between the two sides in the healthy volunteer (P＞0.05). The ratio of NAA/(Cho Cr) ipsilateral to the sympatomatic side of the patient was also lower than that of the control (P＜0.05). Conclusions: there might be some changes with MRS on the lentiform nucleus during the early stage of idiopathic Parkinson's disease with unilateral symptom. MRS may be one of the reliable methods for early or even sub-clinical diagnosis. 相似文献
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Objectives: During visual stimulation, the elevated metabolism rate will couple with increase of blood flow velocity(BFV) in posterior cerebral artery(PCA). This study with TCD was aimed to investigate whether the coupling might change according to the different vasoneuronal conditions. Methods: Ninety-nine volunteers including 24 hypertension(HT) patients and 2 patients suffering from both HT and diabetes mellitus(DM) were enrolled in this trial. BFV and pulse indexes(PI) in P2 segments of PCA on both sides were monitored during visual stimulation. Results: In all subjects, Mean BFV increased and PI went down in response to visual stimulation. The percentages of changes (ΔV and ΔP) of both mean BFV and PI were larger in young group(<55 years old) than in old one(≥55 years old). There was significant positive correlation between ΔV and ΔP. Multivariated regression analysis did not show HT and DM, but age related to ΔV(ΔP). We did not find significant difference of ΔV(ΔP) between left and right sides. Conclusions: Blood flow velocity in PCA P2 segment increased due to decreased cerebrovascular resistance during visual stimulation and the response weakened with aging of the patient. 相似文献
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柳扬 《辽宁广播电视大学学报》2000,(1):63-65
部分大学生面临着信仰危机、道德迷失、价值失范等思想道德困境。本从分析造成的主客观原因、困境的现实表现以及困境的补救措施等三个方面、阐述发代大学生施有卓有成效的思想政治和伦理道德的必要性、紧迫性和艰巨性。 相似文献
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柳扬 《辽宁广播电视大学学报》2000,(1)
部分大学生面临着信仰危机、道德迷失、价值失范等思想道德困境。本文从分析造成困境的主客观原因、困境的现实表现以及困境的补救措施等三个方面、阐述对当代大学生施以卓有成效的思想政治和伦理道德教育的必要性、紧迫性和艰巨性。 相似文献
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ＩＮＴＲＯＤＵＣＴＩＯＮＭａｎｙｉｍａｇｉｎｇｔｅｃｈｎｉｑｕｅｓ,ｌｉｋｅＰＥＴ ,ｆＭＲＩａｎｄＳＰＥＣＴ ,ｃａｎｄｅｍｏｎｓｔｒａｔｅｉｎｃｒｅａｓｅｓｉｎｒｅ ｇｉｏｎａｌｃｅｒｅｂｒａｌｂｌｏｏｄｆｌｏｗ(ＣＢＦ)ｏｒｍｅｔａｂｏｌｉｃｒａｔｅｄｕｒｉｎｇｃｅｒｔａｉｎｎｅｕｒｏｎａｌｓｔｉｍｕｌａｔｉｏｎ .Ｂｕｔｔｈｅｓｅｔｅｃｈｎｉｑｕｅｓａｒｅａｌｗａｙｓｅｘｐｅｎｓｉｖｅａｎｄｍｏｒｅｔｉｍｅｃｏｎｓｕｍｉｎｇａｎｄｒｅｐｅａｔｅｄｍｅａｓｕｒｅｍｅｎｔｓａｒｅｄｉｆｆｉｃｕｌｔ.Ｔ… 相似文献
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柳扬 《小作家选刊(小学)》2003,(1)
破晓是黑到白的渐变，有太阳的时候，则调进了一些赤金。夜晚是冰川融化所成的水，一种清澈的透明，流过枕边，梦里天空蓝了，桃花红了，柳树绿了。想象中，李白身着一袭长衫，自然是白色的。云一样白得飘逸，天一样白得轻盈，昙花一样白得像一个梦，月一样在历史的长河中洁白了千年，直到永远。鲁迅先生是属于人间的，是浓夏时节的野草——墨绿，绿得深沉，绿得坚韧。印象里，张爱玲是油纸伞般的昏黄。泰戈尔是熔金样的流年。凡高是月光的牙白和星光的明黄以及夜空的普蓝。雷诺阿是阳光下年轻的肌肤，如一只熟透的水蜜桃，鲜亮、柔和、温暖… 相似文献
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随机利率下的准备金与寿险风险分析 总被引：5，自引：0，他引：5
在人寿保险的纯保费及理论责任准备金的计算中,死亡率一般依据生命表,利息率一般采用固定利率。实际上,寿险死亡率与生命表的死亡率有所差别,利率具有随机性,寿险死亡率与生命表死亡率的差额及利率的随机性均能形成保险经营中的盈亏风险,本文利用Bayes方法,给出寿险死亡率的分布,并对保险经营中盈亏风险进行了系统分析,最后归结为动态规划模型。 相似文献