现代企业制度和财务管理模式

本文根据现代企业固有的性质和特点,对我国企业现行的会计管理模式以三个方面进行不详尽的探讨。     

Effects of VA mycorrhizae and Frankia dual inoculation on growth and nitrogen fixation of Hippophae tibetana

Through biological inoculation technology, the joint symbiosis of Tibetan seabuckthorn (Hippophae tibetana) in pure culture was identified and the effects of dual inoculation with Frankia and mycorrhizal fungi on the host plants in pot cultures were investigated. The results obtained from the comparative study showed that H. tibetana could form nodules and VA mycorrhiza both in pot and pure cultures. VA mycorrhizae and Frankia can stimulate the growth and the nitrogen fixation ability of host plants, respectively, yet the stimulation of the dual inoculation on the growth and nitrogen fixation ability of the host plants was more significant (p<0.05): stronger nitrogen-fixing ability, higher VA mycorrhizal development and better growth of seedlings in VAH and HR16 dual inoculation.     

花生黄曲霉生长预测模型的研究

通过对分离自花生的黄曲霉LYYSS03-3在不同温度(15-35℃)、不同相对湿度(水活度分别为0.5,0.7,0.9)下的菌落生长特性进行检测,采用Boltzmann和Logistic 模型对黄曲霉的生长曲线进行拟合,结果表明,在适宜温湿度阶段,花生黄曲霉的生长曲线更适合用Boltzmann模型拟合.     

王家厂水库洪水实时预报方法及应用研究

考虑到流域降雨时空变化和流域地形、河道特征对流域产汇流的影响，应用新安江三水源产流模型、流域分散入流非线性汇流模型以及流域洪水实时预报校正模型，对王家厂流域洪水进行模拟，取得了较为满意的计算结果。     

活塞组机械疲劳试验的有限元仿真

对某铝合金活塞在机械疲劳试验机上做的疲劳试验进行有限元分析,为活塞的改进设计提供依据。采用装有活塞销的三维整体活塞有限元模型,应用接触单元模拟实际情况,对活塞在交变机械载荷作用下的应力和应变进行了计算,找出了危险点部位,计算结果与试验吻合。     

有潜在性的大孔吸附树脂模拟植物根系分泌有机酸吸附的方法

为探索一种根系分泌物富集的方法,用静态吸附法,通过研究HPD-400型大孔吸附树脂对水溶液中柠檬酸、苹果酸和酒石酸的吸附行为,模拟大孔吸附树脂对根系分泌物收集液中主要有机酸吸附的结果表明,相同条件下,HPD-400型大孔吸附树脂对3种有机酸的吸附强度依次为柠檬酸>苹果酸>酒石酸;它对各有机酸的吸附能力随各有机酸浓度的升高而增加,随温度的降低而增加;对各有机酸的吸附均符合Freundlich等温吸附方程,且表现为优惠吸附。试验表明,用HPD-400型大孔吸附树脂可作为根系分泌物的富集材料。     

铁矿粉烧结液相流动性能的特征数方程的建立

为解决在研究铁矿粉烧结液相流动性能时通常只考虑面积增长率这一终点信息,而没有考虑过程信息的缺陷以及采用多个指标来表征流动性能在使用上的不便,对影响流动性的因素进行了分析,结合量纲分析和白金汉定理推导出了能定量表征流动性强弱的流动性特征数(LD),简化特征数方程后得到等效流动性特征数(Ld Θ)。试验采用了可视卧式高温炉,记录了铁矿粉烧结液相流动的整个过程信息,通过基础实验和对照实验确定液相流动的起点和终点之后,可以得到每一种矿粉相应的等效流动性特征数数值。测量5种铁矿粉在两种方法下的流动性指标,当只考虑面积增长率时的流动性强弱顺序为A>C≈D>B>E,新方法下为Ld ΘA>Ld ΘD>Ld ΘC≈Ld ΘE>Ld ΘB,两种方法下的指标相近,但是综合了各种重要信息的新指标能进一步区分出各个因素对流动性能的影响程度。     

双氯醇胺对山羊胃肠电活动及运动的影响

采用在瘤胃背囊、皱胃幽门部和十二指肠近端安装有双极胃肠电极及应力传感器的土种公山羊 5头 ,按自身对照设计 ,研究了双氯醇胺对山羊胃肠电活动及运动的影响。结果表明 ,β 激动剂双氯醇胺在功能上有与肾上腺素相似的作用 ,即可直接或间接地抑制山羊胃肠道电活动和运动。与对照期相比 ,给山羊皮下注射双氯醇胺后 ,其瘤胃背囊、皱胃幽门部及十二指肠近端的快、慢波电位振幅显著降低 (p <0 0 5) ,瘤胃运动的应力波值极显著减小 (p <0 0 1) ,但快、慢波频率无明显变化。瘤胃运动的应力波值与瘤胃快波电位振幅以及应力波延续时间与快波峰电位数间呈强正相关 (R值分别为 0 94± 0 32和 0 85± 0 2 7)。体外试验结果亦显示 ,双氯醇胺可使离体十二指肠段的快、慢波电位振幅减小 ,张力波值大幅度下降 ,张力曲线变得平滑     

红壤地油菜上施用的尿素态氮的去向及尿素在提高油菜产量中的效率

Fate of urea nitrogen(N) applied to rape grown on a red soil was investigated by the 15N mass balance technique.and efficiency of urea and effect of nutrients balance in raising rape yield were investigated in a field plot experiment.One hundred and thirty -eight kg N/ha,86kg N/ha as basal dressing and 52 kg N/ha as top dressing,was applied with band application technique.The experiment was conducted in the southeast of china ,near Yingtan City,Jianxi Province.Results from 15N mass balance study showed that when urea urea was applied as basal dressing the plant recovery was 44.0% of the applied N for Treatment T (with application of N,P,K,B and lime),Plant recoveries were 38.0%-40.5% for Treatments-K,-B-lime and RS(without application of K,B or lime as well as with additional rice straw compared with Teatment T),which were not significantly different from Treatment T.In contrast ,plant recovery was only 5.1% for Treatment-P(without application of P), indicating that P was the factor limiting N uptake by rape.However,N remaining in 0-0.30 m soil was high up to 71.6% for Treatment-P,while the corresponding data were 33.0%-42.6% for the other treatments.The total recovery of applied N(including plant recovery and N remaining in 0-0.60 m soil) was 91.5% for Treatment T when urea was applied as basal dressing,while almost all the applied N was recovered when ureawas applied as top drssing,It was suggested that N loss was greatly controlled by using band application method in this experiment.Results from the field plot experiment field plot experiment showed that N supply capacity of this red soil was very low,and the efficiency of the applied N was quite high,7.1kg rape seed was increased by application of one kg N for Treatment T.Nitrogen and phosphorus were the key factors limiting rape yield,and the yield was very low when neither of them was applied.The yield in Treatment-K was significantly lower than that in Treatment T,With the former accounting for 77% of the later.     

农业土壤环境综合评价物元模型的建立及其应用

将农业土壤的重金属污染的级别、评价指标及其特征值作为物元 ,得到模型的经典域、节域、权系数及关联度 ,进而建立了农业土壤环境综合模型 ,通过应用实例加以说明 ,并用 Hamming贴近度法、Fuzzy综合评判法、分级贴近度法进行对照 ,取得较好的效果