酸枣种质资源果实主要数量性状变异及相关性研究

通过对149份酸枣种质的主要数量性状进行分析研究,得出了酸枣果实主要数量性状的变异情况、主要数量性状间的相关性。以149份酸枣种质为材料,对其主要数量性状的变异和相关性进行了分析。结果表明,变异系数的分布范围很广,在6.94%~56.18%之间。可溶性总糖和单果重呈极显著正相关,和可食率呈显著正相关;可滴定酸和单果重、果核指数呈极显著负相关,和可食率、千仁重呈显著负相关,和维生素C呈极显著正相关;维生素C和单果重呈显著负相关。     

部分柚类品种主要果实性状变异及相关性研究

对31个柚类品种主要果实性状的变异情况及性状间的相关性进行了分析研究。结果显示,主要果实性状变异系数的分布范围很广,在9.18%~82.59%之间。单果重和果实横径、果实纵径呈极显著正相关,与果汁率呈显著正相关,与正常种子数、风味呈显著负相关;维生素C与果实横径、果汁率和可滴定酸呈显著负相关;风味与维生素C、固酸比、糖酸比呈极显著正相关,与可滴定酸呈极显著负相关,与果汁率、可食率、单果重和果实横径呈显著负相关。     

Conversion Relationship of Indoor and Field Dynamic Modulus of Subgrade

The Falling Weight Deflectometer(FWD)test, Portable Falling Weight Deflectometer(PFWD)test and Dynamic Cone Penetrometer(DCP)test in field as well as indoor repeated loading test were carried out with three types of subgrade, clay, sandy and earth-rock mixture. The regression relationship of the parameters observed of these three different types of subgrade in field was investigated respectively. The indoor dynamic modulus changed along with different water contents and the relationship waspresented as well as the empirical relationship of the on-site and indoor dynamic The results indicate that in the three different subgrade conditions,a double logarithmic regression relationship between dynamic modulus(EP and EF)and average penetration rate(DP)and a parabola regression relationship between indoor dynamic modulus and water content exist. The regression relationship between field index and indoor dynamic modulus was significant as well.     

Empirical Analysis of Relationship Between Corporate Diversification and Corporate Performance

Based on the relevant literatures from domestic and abroad, the paper empirically tests the relationship between corporate diversification and corporate performance. The results show that there is a negative relationship between diversification and performance in Chinese listed companies, but the significance of relationship is different each year.     

农民资金互助社中关系型贷款技术应用的研究

为了检验新农村金融组织--农民资金互助组织,在发放农户贷款过程中关系型贷款技术的运用情况。以苏北L村农村农户调查数据为基础,运用有序Logistic回归模型和多元回归模型检验了是否拥有互助会业务以及业务龄长这两个“软信息”代理变量对农户贷款金额与频率的影响。实证结果显示：农户“软信息”代理变量与农户从资金互助组织获得贷款的金额和频率有显著的正向影响。表明农民资金互助组织在农户贷款决策中使用了以“软信息”为基础的关系型贷款技术,这有利于增加农户贷款的可得性,缓解农户融资难题。     

气象参数对成都地区办公建筑能耗的影响及预测

气象参数是影响建筑热环境和供暖空调能耗的主要因素之一。基于成都地区1971—2000年共30 a的历史观测数据，生成了建筑能耗模拟软件EnergyPlus所需要的逐时气象数据文件。比较分析了该地区30 a干球温度、太阳辐射等各气象参数月均值的变化，模拟分析了该地区建筑的采暖、制冷及总能耗，利用多元回归建立了建筑能耗与气象参数之间的关系式，并检验了该关系式的准确性。结果表明：成都地区办公建筑能耗变化与各气象参数没有呈现明显的规律性；建筑月总能耗与各气象参数呈纯二次多项式关系，月采暖能耗、月制冷能耗与各气象参数呈交叉二项式关系；建筑月能耗回归模型能够较准确地预测建筑月能耗与各气象参数的关系，且月采暖能耗和月制冷能耗回归模型预测的准确性优于月总能耗模型。     

水稻细胞质雄性不育恢复基因定位及相互关系研究进展

此文综述了水稻细胞质雄性不育恢复基因的分子定位研究成果,回顾了前人关于存在于第10染色体上的恢复基因之间相互关系的研究与探讨,并结合水稻细胞质雄性不育特点及分子机理论述了恢复基因的关系,以期为深入研究水稻细胞质雄性不育机理和应用水稻杂种优势提供参考。     

Relationship between grating parameters and wavelet spectrum values

The relationship between grating parameters and wavelet spectrum values was deduced. Firstly, the vector diffraction theory and scalar quantity diffraction theory were used to calculate the diffraction efficiency. The approximately equal conditions were analyzed next. Finally, the relationship was obtained. The gap width of the plane transmission grating was calculated with the Mexico hat wavelet. The relationship among the parameters of the plane transmission grating, diffraction efficiency and Mexico hat wavelet values was obtained.     

核桃叶片解剖结构与生长势的关系

旨在为核桃矮化性的鉴定及矮化砧的预选提供理论依据,以核桃不同品种6年生嫁接树和3年生实生树为试材,研究了叶片解剖结构与生长势的关系。结果表明:不同品种的核桃嫁接树叶片结构与树体生长势没有明显的相关性,不同品种的核桃实生树叶片结构与生长势有一定的相关性。栅栏组织厚度与干周生长量显著负相关;海绵组织厚度与株高生长量显著正相关;栅海比与株高生长量极显著负相关,与干周生长量、株高、干周显著负相关;叶片气孔密度与株高生长量极显著正相关,与干周生长量、株高、干周显著正相关。叶片栅海比及气孔密度可作为核桃实生苗预测生长势强弱的指标。     

灵石县旱地玉米肥料利用率的研究

为了能够建立当地的施肥指标体系,通过“3414”常规五处理的试验研究,结果显示在灵石的淡褐土上,投肥的肥料利用率呈现出氮肥的利用率与土壤中的有效磷含量（小于20 mg/kg）,碱解氮的校正系数（小于1）,有效磷的校正系数（小于1.2）,速效钾的校正系数（小于0.32）,投磷量（大于105 kg/hm2）、投钾量出以及缺磷区的相对产量（小于58%）呈正相关关系;相反则呈负相关关系。磷肥利用率与碱解氮、有效磷,氮肥、磷肥和钾肥的投入量、有效磷的校正系数（大于1.4）及缺磷区的相对产量皆呈负相关关系;而与有效磷的校正系数（小于1.4）是正相关关系。钾肥的利用率与速效钾的校正系数及缺钾区的相对产量（小于75%）是正相关关系;与速效钾及缺钾区的相对产量（大于75%）呈负相关关系。同时亦可看出中等级肥力的旱地（条甲地）缺钾不明显。     

参考作物蒸发蒸腾量计算简化方法

基于国家“863”节水农业重大专项子课题示范现场的气象资料，对参考作物蒸发蒸腾量及其影响因素进行了相关性分析。选取净辐射和空气饱和差建立了参考作物蒸发蒸腾量的简化计算公式，并引入风速函数进行修正。研究结果表明：参考作物蒸发蒸腾量与净辐射相关系数最大，然后依次是空气饱和差、日照时数和温度；且与净辐射和空气饱和差呈直线关系，与日照时数和温度呈指数关系，而与相对湿度呈负相关关系；考虑风速修正后的简化公式与标准方法（FAO56 Penman-Monteith）的计算结果有较高的一致性。     

日光温室茄子冠气温差与环境因子之间的关系研究

系统地研究了日光温室内茄子冠气温差的变化规律与环境因子之间的关系,运用回归方法建立了主要气象因子与冠气温差之间的数量关系。深入分析了不同土壤水分条件下日光温室内茄子冠气温差与土壤含水量的关系,并建立了二者之间的相关方程,得出了诊断茄子水分状况的指标。     

Conversion Relationship between Two Strength Indices for Effective Stress and Total Stress

The conversion relationship between two strength indices is established by theoretical analysis for the effective stress and total stress. The practical conversion coefficient table is built on the relationship between two strength indices.     

生物性状与大豆产量的关系分析

针对生物性状与产量的关系问题,研究了在八大类函数关系下,按照拟合优度、误差均方根、误差平方和等指标,选取最优的生物性状与产量的关系。结果表明,株高与大豆产量的函数关系为Fourier1,检验结果拟合优度、误差均方根和误差平方和分别为0.9228、6.836和93.45。叶面积指数与大豆产量的函数关系为Poly4,检验结果拟合优度、误差均方根和误差平方和分别为0.7362、71.87和319.2。试验结果表明当株高在46~50 cm范围内,产量关系先高后低,在大于51 cm范围,产量均很低。叶面积指数与大豆产量的关系成抛物线右侧状,随着大豆叶面积指数的增大,大豆产量先增加后降低。     

施氯量与烤烟物质积累相关关系及适宜施氯量研究

采用田间试验,研究了烤烟生长期间烟株氯含量、氯积累量、以及烤后烟叶化学成分与施氯量之间的相关关系。结果表明, 烤烟生长期间烟株不同部位氯含量和氯积累量与施氯量之间呈显著或极显著的线性正相关关系或指数函数关系;烤后烟叶总氮含量、X2F和C3F两个等级烟叶的总糖和还原糖含量与施氯量之间均呈显著或极显著的线性正相关,总钾含量与施氯量之间极显著的线性负相关,总氯含量与施氯量之间呈显著或极显著的线性正相关关系或指数函数关系。根据终采时不同部位和烤后烟叶不同等级的氯含量与施氯量之间的相关关系,计算烤烟适宜的施氯量,认为施氯量在24 kg/hm2左右,对烤后烟叶氯含量是安全的,同时基本可保证烤后烟叶氯含量在0.3%以上。     

青麻叶大白菜种质资源遗传多样性的AFLP分析

利用AFLP分子标记技术,对42份青麻叶大白菜品系间的遗传多样性与亲缘关系进行分析。5对引物组合在42份品系中共获得124条带,其中多态性条带89条,多态性比例为71.8%。计算42份品系间的相似系数范围为0.469~0.977,平均0.707。聚类结果可划分为4组,第一组大部分来源天津市津南区和塘沽地区;第二组基本上都来自津南区;第三组大多来源天津西青区;第四组来源于天津各个地区及河北省。聚类结果与材料的来源地有一定的相关性,较好地反映了42份青麻叶大白菜品系间的遗传背景及亲缘关系。     

Effect of Relationship Quality on International Purchasing Alliance Decision

In the theory and practices of international relationship marketing, relationship quality (RQ) has been paid more and more attention to in the research of enterprises' multi-national business. This paper begins with the analysis of the characteristics of relation and relationship quality, and explains the effect of RQ on the international purchasing alliance decision by a causal analysis model set up. In this model, by theoretical analysis, develop four factors to describe RQ and make an empirical analysis with the answers of 151 purchasing managers in the questionnaire. The result shows that RQ has been the critical factor of international transaction decision.     

草莓果实主要数量性状变异及相关性研究

以露地栽培的82份草莓品种(系)为材料,对其主要数量性状的变异、分布规律及相关性进行了研究和分析。结果表明,草莓果实硬度、可溶性固形物、平均单果重、最大单果重和单株产量基本呈正态分布,不同性状的变异不同;果实硬度与平均单果重、单株产量分别呈显著正相关和极显著正相关,平均单果重与最大单果重及单株产量均呈极显著正相关,最大单果重与单株产量呈极显著正相关。此研究为草莓育种的亲本选配和杂交后代预先选择提供了依据。     

Genome Size Variation in Maize Populations Selected for Cold Tolerance

Previous studies have indicated a relationship between genome size and cold tolerance in plants. Many species adapted to growth in cool environments have large genome sizes. These studies are based on interspecific DNA content variation. In this study, the nuclear DNA content of eight maize populations was determined. These populations were obtained from the University of Nebraska and represent populations selected for cold tolerance and their respective unselected original populations. Intraspecific DNA content variation was observed between the selected and unselected populations. Upon assessing the data based solely on cold tolerance, no clear relationship between genome size and cold tolerance was apparent. When both freeze tolerance and cold tolerance were considered, populations which were cold tolerant and exhibited a certain degree of freeze tolerance were observed to have significantly larger genomes relative to the unselected populations. Thus, it appears that the relationship between intraspecific genome size variation and cold tolerance is similar to the relationship between interspecific genome size variation and growth at cooler temperatures in plants.     

建筑垃圾细料生产流动化回填材料的性能

以灰砂比0.03、0.05和0.08,粉砂比0、0.05、0.1、0.15和0.2为设计参数,对建筑垃圾回填材料进行设计。通过试验对回填材料的流动性(流动度、泌水率)、无侧限抗压强度以及应力应变曲线、本构关系模型和弹性模量等进行研究。研究结果表明:回填材料的流动度受水固比影响较大,两者接近线性关系;流动度在200~250 mm范围,泌水率在4%~8%之间;回填材料抗压强度与灰砂比和水固比之间存在很好的幂指数关系;回填材料应力应变曲线形状与普通混凝土的相似,在此基础上提出回填材料的本构关系模型;回填材料无侧限抗压强度与弹性模量之间存在很好的指数关系。