汽车底盘的大规模定制设计方法研究

运用大规模定制的设计理念,阐述底盘产品族规划流程以及结构树中产品功能结构单元之间及其与产品间的组合关系。针对客车底盘产品实例进行面向大规模定制的客户需求研究,构造客户需求层次分析模型和底盘产品结构模型。在对产品功能与结构的映射关系及产品子功能相关性分析的基础上,研究汽车底盘大规模定制设计方法。     

白斑综合征病毒(WSSV)提取物中43 kDa蛋白来源的MALDI-TOF分析

将纯化的WSSV粒子蛋白经SDS-PAGE分离后,对图谱中出现的43kDa蛋白进行质谱分析,发现该蛋白不是WSSV基因组编码,是来自其宿主的蛋白成分,与肌动蛋白有很高的同源性。提示该蛋白的有无及含量多少与纯化病毒粒子的状态有很大关系,可以作为纯化WSSV完整性的参考指标。     

Spatial and temporal dynamics of land degradation and fluvial erosion in the middle and upper Yangtze River Basin,China

Land degradation in the middle and upper Yangtze has caused loss of cultivable land, sediment deposition in reservoirs and changes in the runoff: sediment yield relationships of major tributaries. The Jialin River and the Dukou-Pingshan sector of the Jingsha River together contribute over 75 per cent of all the sediment carried by the Yangtze at Yichang. As the Jialin catchment has the highest rates of erosion per unit area, high sediment discharges from that river exert a major influence on peak summer sediment discharges on the Yangtze. Even though land degradation is increasing in severity, there is no clear overall pattern or trend in variations in sediment yield since 1950. Some tributaries are affected by major reservoir construction and soil conservation works, others are not.     

表型轮回选择和混合选择改良小麦群体效应的研究

在吴兆苏等(1984)创建的小麦基础群体中,采用不同的选择方案,对不育株和可育株分别进行两轮选择。结果表明两轮选择显著地降低了可育株和不育株群体的株高。可育株群体株高的下降速率大于不育株群体。单株产量和单株穗数没有得到显著的改良。相关性状穗长、千粒重等出现负向间接选择效应。轮回选择通过选株间的互交,维持了不     

云南重楼叶片寄生真菌的初步分离鉴定

云南重楼是多年生草本名贵中药材,高效规范化栽培云南重楼增加了叶部病害的发生几率。为了解云南重楼叶部病害,对云南重楼叶病斑处进行寄生真菌的初步分离,并对其进行形态学鉴定和分子生物学鉴定。经过分离获得19株形态各异的菌落,其中9株为附球菌属;7株为交链孢属 ;2株为黑团孢属;1株粉红单端孢菌。为研究云南重楼病害的病原鉴定及其发生规律和防治方法等提供技术参数,为探索更好的云重楼种植技术提供基础。     

毛细管柱气相色谱法检测大豆中抑菌灵残留（摘要）（英文）

[目的]建立大豆中抑菌灵的毛细管柱气相色谱法。[方法]试样用丙酮提取。分别选用1：48、3：47、5：45的3种乙醚-正己烷体系,制备3支层析柱,用10 ml正己烷活化,各加入0.2 ml,2.5 mg/L的抑菌灵标准溶液,再分别用45 ml上述3种淋洗液体系淋洗,每5 ml收集1次,分别进样测回收率,以淋洗液体积（V）为横坐标,回收率（%）为纵坐标绘制淋洗曲线。比较后选择3：47乙醚-正己烷淋洗体系,淋洗体积为25 ml。经正己烷液液萃取后,用弗罗里硅土柱净化,经毛细管气相色谱柱分离（柱温采用程序升温方式,初始温度50℃,保持1 min;以25℃/min的速度升至125℃后,再以10℃/min的速度升至300℃,保持3 min。采用恒流条件下无分流进样）,用ECD检测器测定。[结果]抑菌灵含量在0.05、0.25、0.5、1.0 mg/L范围内,峰面积与抑菌灵的浓度呈良好线性关系,线性方程为s=12 346C＋63（r2=0.999 6）。以信噪比（S/N）为3计算抑菌灵的定性检出限为0.005 mg/kg;以信噪比（S/N）为10计算抑菌灵的定量检出限为为0.05 mg/kg。精密度测定表明,该方法具有较好的准确度和精密度。[结论]建立了大豆中抑菌灵的毛细管柱气相色谱法。该方法简单快速,灵敏度高,可满足粮谷中抑菌灵含量的测定要求,可在实际中应用和推广。     

云南野生黄牡丹花色素成分的鉴定

以云南野生黄牡丹为材料,通过特征显色反应、紫外—可见光谱扫描及高效液相色谱—质谱技术(HPLC-MS)对其花瓣中的色素成分进行了初步分析和鉴定.结果表明,黄牡丹花色素的组成包括类黄酮和叶绿素两大类,其中类黄酮类色素主要为查耳酮和黄酮、黄酮醇的混合物,包括2’,4’,6’,4-四羟基查耳酮(2’,4’,6’,4-tetr...     

Assessing effect of wind tunnel sizes on air velocity and concentration boundary layers and on ammonia emission estimation using computational fluid dynamics (CFD)

The objective of this study was to investigate the effect of different geometric sizes of wind tunnels on aerial boundary layers above the emission surface and therefore their effect on ammonia emission using CFD tool. Five wind tunnels of different sizes were used for the CFD simulation. Detail experimental measurements on air velocity and concentration profiles above the emission surface were realised using average inlet velocities of 0.1, 0.2, 0.3, and 0.4 m s⁻¹ in two wind tunnels under isothermal condition. The TAN (Total Ammoniacal Nitrogen) and pH of ammonia aqueous solution were kept constant during the experiments. The boundary conditions necessary for the CFD study were obtained from the measured experimental data. The CFD model used for simulations was first validated using the data from the two wind tunnel experiments. For assessing the effects of wind tunnel size, the air velocity range of 0.1-0.6 m s⁻¹ was used in CFD investigations. It was found that the velocity and concentration boundary layer thickness decreased with the increase of inlet air velocity where the concentration boundary was thinner than the corresponding velocity boundary layer. Wind tunnel sizes affected both velocity and concentration boundary layer thicknesses (P < 0.001). The velocity and concentration boundary layer was thicker in a wind tunnel with larger heights than in small height. The over estimation of ammonia emission of smaller wind tunnels were observed comparing to the largest wind tunnel or open field situation (P < 0.001). Non-linear regression equations were developed using four wind tunnels data for velocity boundary layer thickness (δ_u), concentration boundary layer thickness (δ_c), and ammonia mass transfer coefficient (k_G) as a function of wind tunnel height (H) and average inlet velocity (u_m), which given clear quantitative indication of effects of H, and u_m on δ_u, δ_c, and k_G, respectively.     

Separation and Identification of Differentially Expressed Proteins in Pistillate Flowers between Different Mulberry Cultivars

[Objective] This study aimed to explore the proteins related to pistillate flower development in different mulberry cultivars. [Method] The total proteins of the pistillate flowers of two mulberry cultivars Dal0 （Morus atropurpurea Roxb.） and SG01 （Morus muIticaulis Perr.） were extracted, separated and detected through two- dimensional electrophoresis （2-DE） and mass spectrometry. [Result] There was sig- nificant difference in the expression of proteins from the pistillate flowers of different mulberry cultivars. From the 2-DE images of Dal0 and SG01, 445_＋17 and 425_＋12 protein spots were respectively detected. The expression levels of 75 protein spots differed significantly. Thirteen spots those were expressed at high levels and well separated were analyzed by mass spectrometry, and nine of them were identified successfully. The nine proteins are involved in the glycometabolism, protein and amino acid metabolism and defense responses during the development of mulberry pistillate flower after they were pollinated. [Conclusion] The findings will provide reference for further study on the molecular mechanism of mulberry pistillate flower de- velopment.