带收入分配影响因素的中国城镇居民消费分析

文章采用标准差变异系数来度量中国城镇居民的收入分配差距，通过标准差变异系数与城镇居民平均消费倾向之间的散点图，确定两者间的函数关系，并在此基础上，改造弗里德曼的持久收入假说消费函数模型，构建带收入分配影响因素的消费函数模型。     

温度对锯缘青蟹状幼体呼吸和排泄的影响

用水瓶法和径流装置测定了锯缘青蟹各期状幼体(Z1～Z5)在不同温度(22、24、26、28、30和32℃)下的耗氧率和氨氮排泄率.实验结果表明,耗氧率和氨氮排泄率随温度的升高而升高,但各期幼体之间存在差异;Q10值表明,最适温度Z1和Z2是24～26℃,Z3和Z4是28～30℃,而Z5是26～28℃;耗氧率和氨氮排泄率与幼体干质量呈幂函数关系,M=aDWb,耗氧率和氨氮排泄率的a值范围分别是119.26～304.64和508.13～942.17,平均值分别为180.23和754.74;b值范围分别是-0.6724～-0.5155和-0.7729～-0.4536,平均值分别为-0.5865和-0 6131;不同温度下各期幼体的O/N平均值为15.6,青蟹幼体主要以蛋白质代谢物质;耗氧率和氨氮排泄率与温度和体重的二元回归方程分别为R=14.83+0.526T-0.090DW(r2=0.8211,n=26)和E=6.09+4.47T-0 376DW(r2=0.7796,n=26),F检验表明相关性极显著(F相似文献   

以"产业"思维方式思考高等教育改革

试从高等教育的质量、效益、机制等方面对高等教育产业化进行探讨--以"产业"的思维方式研究人才的质量标准,适应"用户"需求,注重培养"关键能力",强化实践能力,突出个人特色,保证人才培养质量;教育必须讲效益;学生不仅是消费者也是参与者、创造者,学校应尊重和保护学生作为消费者的权益;让投资者成为盈利者;建立"需要者出钱"和"有钱者出钱"两种机制.     

扶桑花乙酸乙酯溶物（HR—3）对心血管活动影响的初探

初步观察了扶桑花乙酸乙酯溶物（ＨＲ３）的抗心肌缺氧作用及对动物血压和离体蛙心的影响．实验表明：①ＨＲ３可使ＩＣＲ小鼠的常压耐缺氧时间显著延长（Ｐ＜０．０１）,该作用与心得安无明显差异;可以明显延长夹闭气管小鼠的心电消失时间和异丙肾上腺素处理的小鼠心肌耐缺氧时间,提示ＨＲ３能对抗心肌缺氧．②１００ｍｇ／ｋｇ以上的ＨＲ３能明显降低家兔的收缩压与舒张压,该降压作用不被阿托品阻断,但不影响心率．③ＨＲ３对离体蛙心的心率及振幅呈梯度抑制作用,且该作用是可逆的．提示ＨＲ３可能通过减弱心肌收缩力,而产生降压作用和对抗心肌缺氧．     

Participatory Action Research and the Development of Critical Creativity: A “Natural” Combination?

This paper focuses on the research strategy that I employed during doctoral studies. An overarching framework of Action Research (AR) was used in the development of a complementary approach to creative studies. At the time of the studies AR seemed to be a natural choice and I did not overly concern myself with exploring as to why that was the case. However, I recognize the value of contemplating the appropriateness of research strategy and, in this paper, now reflect on some of the parallel strands implicit in AR and in critical creativity that I now realize served to enrich the overall research process.     

拜耳法中石灰用量与氧化铝溶出率和碱耗的关系

在拜耳法高压溶出过程中,添加石灰可以改善赤泥相组成。采用这种工艺,可以提高氧化铝溶出率和降低碱耗。研究表明,这一水硬铝石的溶出,采用传统公式计算Ａｌ２Ｏ３理论溶出率和碱的化学损失是不正确的。     

GY-1内燃机车油耗记录管理系统

介绍一种利用IC卡作为媒体进行数据双向传送的集散系统──GY-1内燃机车油耗记录管理系统的设计方法。     

能源消费量模拟分析和预测的神经网络方法

基于我国１９７８～１９９４年间能源消费量的实际数据,采用人工神经网络方法对影响能源消费量的主要因素进行了模拟和分析。然后,采用相关因素预测法和组合预测法预测了能源消费量。经实际样本检验表明：组合预测法的预测精度较高。最后,应用组合预测法预测了我国１９９５～２０００年的能源消费量。     

Relationship between action potential, contraction-relaxation pattern, and intracellular Ca2+ transient in cardiomyocytes of dogs with chronic heart failure

Abnormalities of contractile function have been identified in cardiomyocytes isolated from failed human hearts and from hearts of animals with experimentally induced heart failure (HF). The mechanism(s) responsible for these functional abnormalities are not fully understood. In the present study, we examined the relationship between action potential duration, pattern of contraction and relaxation, and associated intracellular Ca²⁺ transients in single cardiomyocytes isolated from the left ventricle (LV) of dogs (n = 7) with HF produced by multiple sequential intracoronary microembolizations. Comparisons were made with LV cardiomyocytes isolated from normal dogs. Action potentials were measured in isolated LV cardiomyocytes by perforated patch clamp, Ca²⁺ transients by fluo 3 probe fluorescence, and cardiomyocyte contraction and relaxation by edge movement detector. HF cardiomyocytes exhibited an abnormal pattern of contraction and relaxation characterized by an attenuated initial twitch (spike) followed by a sustained contracture ('dome') of 1 to 8 s in duration and subsequent delayed relaxation. This pattern was more prominent at low stimulation rates (58% at 0.2 Hz, n = 211, 21% at 0.5 Hz, n = 185). Measurements of Ca²⁺ transients in HF cardiomyocytes at 0.2 Hz manifested a similar spike and dome configuration. The dome phase of both the contraction/relaxation pattern and Ca²⁺ transients seen in HF cardiomyocytes coincided with a sustained plateau of the action potential. Shortening of the action potential duration by administration of saxitoxin (100 nM) or lidocaine (30 μM) reduced the duration of the dome phase of both the contraction/relaxation profile as well as that of the Ca²⁺ transient profile. An increase of stimulation rate up to 1 Hz caused shortening of the action potential and disappearance of the spike-dome profile in the majority of HF cardiomyocytes. In HF cardiomyocytes, the action potential and Ca²⁺ transient duration were not significantly different from those measured in normal cells. However, the contraction-relaxation cycle was significantly longer in HF cells (314 ± 67 ms, n = 21, vs. 221 ± 38 ms, n = 46, mean ± SD), indicating impaired excitation-contraction uncou pling in HF cardiomyocytes. The results show that, in cardiomyocytes isolated from dogs with HF, contractile abnormalities and abnormalities of intracellular Ca²⁺ transients at low stimulation rates are characterized by a spike-dome configuration. This abnormal pattern appears to result from prolongation of the action potential. Received 22 January 1998; received after revision 16 March 1998; accepted 27 March 1998     

华中电网用电量与气候的变化及其相关性诊断分析

利用华中电网４省１９８６￣１９９４年逐月全社会用电量、居民生活用电量及同期气候资料研究表明：１）４省气候变化趋势一致即年变化小但季节变化大;２）ｅ１,ｅ２均呈线性增加趋势,冬夏增加最快,ｅ２的相对增长比ｅ１的相对增长快近１倍;３）河南省各季两项气象（影响）用电量与气温均为正相关,与雨量均为负相关,其余３省与气温大多为负相关;４）气温对气象（影响）用电量的影响大于雨量的影响;最后分析了两项气象（影响