呼和浩特市客运出租汽车数量预测模型研究

一个城市的客运出租市场是否需要投放出租汽车和投放数量的多少,不仅影响服务质量,也影响每位出租汽车经营者的自身利益,从而影响整个．出租汽车行业的稳定与健康发展。本文对出租汽车影响较大的因素进行了统计和相关性分析,确定了自变量,采用回归模型和曲线拟合的方法建立了未来年份的出租汽车数量预测模型,预测结果和往年历史数据对比表明,时间变量的一元线性模型和实际值较接近;幂函数曲线的预测值增加较快,就呼和浩特市的具体情况,幂函数曲线的预测效果较好。本文给出了适合呼和浩特市区的出租汽车发展趋势和合理的数量预测。     

Genotypic diagnosis of long QT syndrome by analysis of candidate genes

Objective To diagnose 6 LQTS families by genetic analysis. Methods A total aof 6 LQTS pedigrees with 43 family members were brought together for genetic diagnosis by using short-sequence tandem-repeat (SIR) markers or sequencing. Genomic DNA was extracted from blood samples by standard procedure. STR markers or KCNQ1, KCNH2 and SCN5A were amplified. The haplotype analysis for LQTS was performed. If the family got the negative haplotype analysis, the sequencing was performed. Results LQTS patients were always linkaged with the SCNSA gene in family 1. KCNH2 was linkaged with the disease in family 2 to 5.21 gene carriers were identified from these 5 families. A mutation (A561V-KCNH2) was only found in the proband of family 6 and an SNP (G1691A) was found in all the members of the family. Conclusion Genetic diagnosis can not only improve presymptomatic diagnosis,bnt also provide the basis for personal therapy and research on disease-causing mutations.     

改进的禁忌搜索算法求解多机并行模糊调度问题

提出一种改进的禁忌搜索算法求解多机并行模糊调度问题,该算法在邻域中引入记忆结构,可以减少重复搜索,并对候选解集使用映射排序法进行剪枝,减少了搜索空间,从而极大的提高了算法效率．同时为了减少计算误差,该算法计算时不需要将模糊时间转换为精确时间求解,可以同时处理作业加工时间是三角模糊数或梯形模糊数的情况,从而更具有通用性．仿真结果证明该算法有效、可行．     

缓冲结构对铁路隧道车站气动效应影响研究

参考海南东环线美兰机场隧道及地下车站的部分设计参数,针对铁路隧道中部为车站的情况,通过试验对列车通过隧道时的压力波动过程进行了模拟,分析模型试验中压力和压力梯度曲线的规律,对不同的开口型缓冲结构削减隧道车站内的压力峰值和压力梯度峰值的效果进行了研究,最后确定采用相对最优方案。     

碳纤维混凝土断裂韧度研究

利用三点弯曲梁试验,在虚拟裂缝模型理论指导下研究碳纤维体积率对碳纤维混凝土断裂韧度的影响。研究表明：随碳纤维体积率的增加,碳纤维混凝土的断裂韧度及其增益比均呈现增长趋势,且增长的速度是非线性的。     

子结构技术及其在摇枕计算中的应用

采用子结构技术,对几何形状相当复杂的摇枕进行了分析。给出了子结构技术的关键技术。计算结果与试验结果基本一致。     

连梁对RC双肢剪力墙抗震性能影响初探

用非线性有限元分析方法,对ＲＣ双肢剪力墙的地震反应进行了计算。利用计算结果,分析了地震作用下双肢剪力墙的受力性能以及连梁对受力性能的影响规律,提出了双肢剪力墙设计中连梁跨高比的取值建议。     

EXPRESSION OF ANDROGEN RECEPTOR IN THE DEVELOPING RAT EPIDIDYMIS AND ITS REGULATION BY ANDROGENS

Epididymis depends upon androgens for itsprenatal and postnatal differentiation,absorptionof testicular fluid,transport of sperm,and secre-tion of proteins thatbring aboutfunctional changesin sperm[1] .Because of the significance of andro-gens in epididymis- mediated sperm maturation,weassessed the localization,developmental patterns,and hormonal control of androgen receptors(AR)in the developing and ethane dimethane sulfonate(EDS) treated SD rat epididymis(caput,corpusand cauda) .The immuno…     

FOLLICULO-STELLATE CELLS OF THE RAT ANTERIOR PITUITARY RESPONDED TO ANGIOTENSIN Ⅱ BY INCREASING INTRACELLULAR Ca~(2 ) CONCENTRATION

Previous studies have shown that folliculo-stellate cells(FSC) in the adenohypophysis pos-sess various functions[1] .It has been most noticedthat FSC regulate the hormone secretion from pitu-itary endocrine cells by a paracrine mechanism orgap junction- mediated exchanges[2 ,3] .Studies usingpituitary cell aggregates enriched with FSC re-vealed that the cells mainly inhibit the release ofgrowth hormone- releasing hormone(GHRH) andβ- adrenergic stimulation of growth hormone (GH)release,t…     

PAG电刺激和微注射吗啡对脊髓WDR和NS神经元放电的影响

中脑导水管周围灰质 (PAG)电刺激和微注射吗啡均能显著抑制广动力型 (WDR)和特殊伤害感受 (NS)神经元的伤害感受性放电。但是对 NS神经元放电的抑制明显地大于对 WDR神经元。电刺激 PAG能完全抑制 NS神经元的伤害感受性放电。于 PAG微注射吗啡后 ,NS神经元和 WDR神经元的伤害感受性放电均显著减少。但 NS神经元受抑制的程度更大。电刺激 PAG能使外周传入诱发的背根电位 (DPR)慢电位 (DR- 波 )明显增大 (P <0 .0 0 1)。本研究结果揭示 ,PAG对脊髓 WDR和 NS神经元活动的抑制作用的程度 ,具有明显的差异性 ,以对 NS神经元的抑制为著。由观察 DRP的结果提示 ,在 PAG对脊髓伤害感受神经元的下行抑制作用中 ,可能有突触前抑制参与。