深州杨生物学特性及栽培管理

河北省深州市当地群众为了解决毛白杨(Populus tomentosa Carr)扦插成活率低这一实际难题,进行了毛白杨的芽接繁殖,从中发现了新的毛白杨杂合体,定名为深州杨.作者对深州杨的生物学特性、分化特性及栽培管理进行了初步介绍,为生产实践提供依据.     

陕西省农村劳动力就业情况与其教育程度关系调查分析——以陕西六县为例

以陕西六县实地调研数据为依据,对调研地区劳动力就业的基本情况进行分析,根据农村劳动力教育程度对农村劳动力就业的影响,分析得出：农村劳动力的受教育程度对劳动力就业的选择有较大影响,且与农户收入存在正相关关系。最后针对分析结果,结合陕西实际情况,提出相关对策建议。     

黑稻CHS基因外显子Ⅱ部分序列遗传变异分析

以汉中栽培2种黑稻(黑丰,黑米B)和1种白稻(香粘)为材料,根据水稻查尔酮合成酶(chalcone synthase,CHS)基因DNA序列的保守区域设计3对引物,进行PCR扩增,获得CHS外显子Ⅱ部分序列,测序并与籼稻CHS基因(X 89589.1)比对,发现有13处SNP,这些SNP可能是黑稻种子黄酮类物质含量差异的重要原因之一.稻和其他植物CHS基因外显子Ⅱ序列的进化分析表明,CHS基因虽然整体上反映进化关系,但由于不同基因的进化历史不同,因此单独用CHS基因的进化树来反映物种的进化关系是不确切的,而应尽量选择多位点进行研究.研究结果为高黄酮类物质含量的黑稻育种和黑稻CHS基因在分子系统分类方面提供了必要数据.     

Ratio control strategy for solving system response lag of continuously variable transmission system

Generally, there’s a system response lag in the continuously variable transmission system, and this leads to a deviation of the engine work point from the optimal operation line of the minimum fuel consumption. To reduce the influence of system response lag, a new CVT ratio control strategy with the system response lag parameter during computing target ratio is proposed. Simulation results indicate that the proposed control strategy can overcome the effect of system response lag, so as to keep the engine work point on the optimal operation line effectively. A comparison of fuel consumption is made between the proposed control strategy and the traditional one by simulation, and results indicate that the proposed control strategy reduces the fuel consumption of the system by 2.85％.     

遥感技术教学实习与精准农业相结合初探

分析了地理信息系统专业中遥感教学实习的情况,通过寻找构建出两者相结合的框架结构,总结了遥感技术教学实习与实际应用相结合的路径,使学生在完成教学实习的过程中又能服务于社会。     

Localization Band Angle Prediction With Three invariant Model

The prediction with RR’s two invariant Model are smaller than the data, while it can catch the trend of linear increase in band angle with increasing mean stress for fixed values of the least compressive stress and a decrease with increasing values of the least compressive stress.Based on the RR’s two invariant Model, with a Lode angle as the third invariant and the more complicated yield condition, true trixial compression test was carried out.And three invariant model was proposed in good agreement between real data and predictions.     

Measurement and Analysis of Multi Functional Stadium ofGuangdong College of Pharmacy

Lighting and air conditioning energy consumption of stadium is very large. That how to use natural lighting and natural ventilation is the key pivot for stadium energy efficiency design. A variety of passive energy efficient measures were used in the Multi functional stadium of Guangdong College of Pharmacy, such as lighting windows with vertical blinds in east and west facades, Openable windows on south and north facades, planting roof and etc. It was found that the above mentioned passive designs could 〖JP2〗increase natural illumination of competition venues, prevent the glare, raise wind speed in audience area, improve comfort level and decrease internal surface temperature of affiliated building and reduce heat radiation.     

Simulation for the Effect of Building Plan andOrientation on Natural Ventilation

Indoor thermal comfort can be significantly improved by natural ventilation with reasonable architectural design. In order to compare natural ventilation effect, the distribution of velocity field, temperature field and the PMV in different architecture layout and orientation design were analyzed with house types in Best House Type Competition. It was found that indoor natural ventilation effect was obviously improved by means of altering the layout and orientation, where the maximum velocity varied from 0.24m/s to 0.82m/s. And the temperature decreased 0.9℃ and the value of PMV was more approximate to comfort.     

The finite element analysis on electromechanical behaviors in bone tissues

Osteoblast is looked as a homogeneous isotropic and viscoelastic body which can’t be compressed. Using the standard linear model of viscoelasticity, the matrix form of the relationship between stress and strain can be achieved, so the finite element balance equation can be got through Lagrange equation. An example for bone tissues on porous media board under loading is calculated, the history of displacement, velocity and stress are obtained. Then the osteoblast cultured invitro can be numerically analyzed by computer program, and the deformation, the velocity and the stress of osteoblast can be calculated.     

Uranium recovery from leach solution in in situ leaching of uranium with ion exchange absorption

The absorption of uranium by ion exchange resin is studied based on the characters of pregnant solution for a new uranium in situ leaching mine. The resin types, the absorption parameters and the eluting parameters are chosen in the experiments. The results showd that the 201×7 strong alkaline anion exchange resin and TSF 2 anion exchange resin had good absorption and eluting effects. The fixed bed anion exchange absorption is a suitable technology and NH4NO3＋HNO3 mixed solution is an appropriate eluting reagent for this technology.