Optimality Conditions for Nonsmooth Extremum Problems in Topological Vector Spaces

Some new concepts of coneD_s convexity,coneD-s quasiconvexity,cone D-s pseudoconvexity,s right derivative of vector value mapping are proposed;and their related properties are discussed;the optimality necessary conditions and sufficient conditions for constrained extremum problem(VP)involving in cone D-s convex mapping are extablished;the relation between local optimal solution and global optimal solution;as well as the relation between weakly efficient solution and efficient solution for (VP) are derived;the corresponding results generalize the related results of classic convex programming.     

Experimental Study on the Deformation Characteristics of Fine-Sandstone Under the Loading and Unloading Conditions

The deformation characteristics of the fine-sandstone is studied under the loading and unloading conditions at the three different deformation-rates and the two different stress-levels. The experimental results show that there is really the plastic-loop in the deformation curve for the loading deformation curve is different from the unloading deformation curve. But the plastic-loop is nearly unchangeable since the second circulate loading. The residual-deformation is be almost zero since the second circulate loading, and that the slope of the deformation curve increases as the deformation-rate increases, and that the residual-deformation increases as the stress-levels increases.     

The Feasible Control for the Day-operation of the Three-Gorge Cascade Hydropower Station

The feasible control problem is presented for the day-operation of the Three-Gorge Caseade Hydropower Station. The significance of the problem is explained. Basic propetties ofthe problem and the approaches to study it are discussed. Two methfods are given for solving theproblem. which are calculus of variation and linear programming. In the former. the Euler equationwith time-lag and the generalised two-point boundary conditions are obtained and the correspondingpractical implication is interpreted. In the latter. the rationality for the discrete model is exptainedand the computalional details are given for the implement software. some questions which should bepaid much attentfon and the corresponding propeels are prasented based on the numerical results andtheoretical analysis     

Evolvement of Plastic-loop of Fine-sandstone Under the Loading and Unloading Conditions

The deformation characteristics and the plastic-loop of the fine-sandstone is studied under the loading and(unloading) condition at the three different deformation-rates and the two different stress-levels,the results show: 1) There is really the plastic-loop in the deformation curve for the loading deformation curve is different form the unloading deformation curve.But the plastic-loop is nearly unchangeable since the second circulate loading.2) There is different for every imitational parameter between the first deformation curve and the second deformation curve at the different stress-levels and the different deformation-rates,but every imitational parameters become more and more invariable gradually since the second circulate curve.3) With the change of the deformation-rates and stress-levels,the imitational(parameters) will change with it.4) The imitational parameters are different for loading section and unloading section of the fine-sandstone deformation curve at the same circulate curve under the same deformation-rate and stress-level.     

不同土壤条件对蓝莓光合作用和叶片氮、磷、钾含量的影响

本实验以南高丛蓝莓品种‘绿宝石’为研究材料,以土壤pH、有机肥施用量和珍珠岩施用量三个因素设置正交实验,研究蓝莓在不同土壤条件和不同生长时期,其净光合速率、气孔导度、胞间CO2浓度、蒸腾速率以及叶片氮、磷、钾含量的变化规律,为蓝莓健康生长提供理论依据。结果表明：萌芽期,最佳处理土壤条件为土壤pH值4.2,有机肥施用量14.4 kg,珍珠岩施用量3600 g,净光合速率达到11.23 umol CO2 m-2s-1。生长旺期,最佳土壤条件为土壤pH值5.8,有机肥施用量7.2 kg,珍珠岩施用量为5400 g,最大净光合速率达到10.11 umol CO2 m-2s-1。挂果期,最佳处理土壤条件为土壤pH值5.8,有机肥施用量14.4 kg,珍珠岩施用量1800 g,净光合速率为8.78 umol CO2 m-2s-1。综上所述,在不同时期,土壤pH、有机肥施用量和珍珠岩施用量配比施用对蓝莓光合作用和叶片氮磷钾含量具有显著影响,但不同时期对土壤条件需求不同,应该结合蓝莓生长的实际需求,在不同时期对蓝莓土壤条件进行改良,以利于蓝莓生长。     

2011年龙眼挂果率高的气象成因分析

通过对2010/2011年度玉林市龙眼秋梢抽生期—开花着果期的农业气象条件进行诊断分析,得出2011年挂果率高的主要原因是：2010年8—9月份的光温水条件配合较好对秋梢抽生相当有利,紧接着从10份开始出现了秋、冬、春三季连旱,冬季和早春的气候也比较寒冷,在干旱和寒冷的双重作用下,非常有利于控制冬梢和促进花芽分化,也有利于抑制抽穗期间“冲梢”现象的发生,因此成花情况普遍良好;由于2011年开花期比正常年景偏迟了将近1个月,因此很好地避过了正常年份开花着果期的低温阴雨天气,使得2011年出现了花多果也多的喜人景象,挂果率是最近几年中最好的一年。在今后的龙眼生产中,应根据龙眼的开花结果习性和玉林市的气候特点,采取一些相应的对策,加强管理,以最大限度地提高挂果率。     

不同培养条件对火龙果种子萌芽的影响

通过采用MS培养基、MS 2.0mg/LGA3培养基、纸床（双层无菌滤纸）对红肉火龙果种子进行萌芽试验。试验发现,接种后5d,纸床培养的火龙果种子的萌发率最高,为95%;其次是MS 2.0mg/LGA3培养基,为89%;萌发率最低的是MS培养基上的火龙果种子,为81%。15d后,MS 2.0mg/LGA3培养基上火龙果幼苗的生长势高于其他两种培养方式,幼苗平均高度为1.5cm,子叶较厚,浅绿色。结果表明,MS 2.0mg/LGA3培养基为较为理想的火龙果种子萌芽培养基。     

汽车变速器齿轮修形仿真分析

汽车变速器的关键部件齿轮因其加工和装配质量的影响,工作时容易引起振动噪声大及承载能力降低等问题,而齿轮修形是解决这些问题的有效方法,且成本较低。针对某款汽车变速器,利用Romax对齿轮进行修形分析。结果表明,修形后减小了齿轮的传动误差和最大接触应力,齿面载荷分布更加合理。有效改善了齿轮的传动性能,增加了齿轮寿命。     

菜地土壤中纤维素降解菌的筛选及其产酶条件优化

利用传统的微生物学方法,从菜地土壤中筛选出高产纤维素酶的菌株,并对其产酶条件进行优化。结果表明,从4种菜地土壤中共分离获得16株纤维素降解菌,其中生菜地土壤中获得的菌株最多,白菜地土壤中获得的菌株最少;在16个菌株中,从油菜地中分离纯化的1个菌株具有最强的纤维素降解能力;对该菌株的产酶条件优化发现,以麸皮作为唯一碳源、培养温度35℃、培养时间96 h时酶活力最高。     

热带土壤中解淀粉芽孢杆菌HNU1的鉴定及发酵条件优化

重金属毒性强、不可降解,在环境中可持续存在,土壤中的重金属可通过食物链累积,对生物体的健康构成严重威胁。土壤微生物修复重金属污染方法具有经济成本低、周期短、效率高、无二次污染等优点,也存在外源微生物在土壤环境中不易存活和繁殖的缺点。通过形态观察、生理生化试验以及16S rDNA同源性序列分析对前期研究中分离保存的一株铜富集细菌HNU1菌株进行鉴定,鉴定该菌为解淀粉芽孢杆菌(Bacillus amyloliquefaciens)。并通过单因素试验和正交试验找出该菌株的最适发酵条件,该菌的最适培养基组成为蔗糖2 g·L-1,酵母粉4 g·L-1,胰蛋白胨6 g·L-1,MgSO4 5 g·L-1。培养条件为初始pH为8.0,温度37 ℃,接种量0.1%,摇床转速180 r·min-1,50 mL三角瓶中装液量20 mL。鉴定的解淀粉芽孢杆菌HNU1菌株对Cu具有良好的富集作用,可进一步开发为微生物肥料用于重金属污染农田土壤的修复,对土壤修复和改良具有重大意义。