德约科维奇竞技能力的变化特征与发展趋势研究

通过ATP官方网站获得德约科维奇职业生涯参加的四大满贯赛事的所有比赛成绩、战绩、单场技术统计、年度技术统计排名、年终排名等数据资料并进统计,分析德约科维奇职业生涯竞技能力的变化特征,探讨德约科维奇竞技能力的发展趋势。1、德约科维奇的职业生涯竞技能力可划分为“成长期”、“突破期”、“巅峰期”三个阶段;2、德约科维奇在发球局的竞技能力呈现“波浪式”上升的特征, “ACEs”、“一发胜率”的不稳定是导致德约科维奇在发球局竞技能力产生波动的主要因素。3、德约科维奇在接发球局的竞技能力呈现快速上升的变化特征,“破发成立率”的不稳定是是导致德约科维奇在接发球局竞技能力产生波动的主要因素。4、德约科维奇技术全面,打法先进,在继续提高自己发球的攻击性,同时平衡好发球质量与发球成功率之间的关系,竞技能力必将得以延续,甚至可以迎来职业生涯新的高峰。     

广西制糖产业的自主创新能力指标选择及模型建立研究

运用KPI和层次分析法,采用自主创新能力综合评价模型,选取国内及国外共7个地区与广西制糖产业自主创新能力进行比较分析,找出了广西制糖产业自主创新能力的薄弱环节并给出了相应的对策,以期为进一步加快广西制糖产业又好又快发展提供参考。     

Combining ability and heterosis of sorghum germplasm for stem sugar traits under off-season conditions in tropical lowland environments

Bioethanol production from sweet sorghum entails expansion and intensive production of the crop, which may include off-season production in the warm tropical lowlands. However, suitable cultivars are currently not available for this environment, especially in southern Africa. Hybrid cultivars were long ago demonstrated to be more productive than pure line varieties. Therefore a study was conducted to determine heterosis of experimental hybrids, and combining ability of parental lines for stem sugar traits. Sixty-four hybrids were generated among 16 lines in accordance with North Carolina design II mating scheme. Eight parents were cytoplasmic male sterile lines which were designated as females and were crossed with eight male fertile lines. The hybrids were evaluated at two sites in Mozambique and South Africa under off-season production conditions. Row-column alpha designs with three replications were used and standard agronomic practices were followed at both sites. Data were analysed in GenStat computer package. There was significant (P = 0.05) variation among genotypes for stem °brix and associated traits. The top 20 stem °brix performers were constituted by 17 hybrids, exhibiting heterosis of up to 112%, and three parents. General and specific combining ability effects were significant for stem °brix and associated traits implying that both additive and non-additive gene action, respectively, were important for controlling the traits. The lines ZLR1 and ICSVP3046 displayed significant and positive GCA effects for stem °brix, while 13 crosses showed positive and significant SCA effects. These lines and the crosses ISCVP3046 × ICSA4, ICSV700 × ICSA731, ICSR165 × ICSA307, ZLR1 × ICSA474 and ICSR57 × ICSA479, which combined high mean performance with positive SCA effects, would be recommended for use in breeding new varieties for tropical lowland environments.     

西藏山南市干旱风险区划

利用西藏山南市所辖气象站1981—2013年逐日降水量、2013年山南市12区县灾情数据以及山南市1∶25万河网、植被、高程等地理信息数据,综合分析山南市干旱致灾因子危险性、孕灾环境敏感性、承灾体易损性、防灾减灾能力等风险因子,探讨山南市干旱灾害综合风险区划。结果表明,山南市干旱灾害高风险区主要位于沿雅鲁藏布江中游的贡嘎、扎朗、乃东、隆子西南部;次高风险区位于山南西部浪卡子大部、加查大部以及南部隆子主体;中等风险区主要落区在沿江一线的桑日、曲松、琼结、措美大部、洛扎西部、错那县北部;次低或低风险区位于琼结与浪卡子交界处、洛扎县东南部、错那县。     

高等院校动物医学专业本科学生实践创新能力培养的研究

摘要：全面推进动物医学专业学生实践创新能力的培养,符合现代教育理念和我国未来发展的趋势。为了满足社会的快速发展及国家对畜牧行业高素质应用型人才的需求,同时也为了配合辽宁老工业基地实现经济的转型与快速发展,作为辽宁省主力农业院校的沈阳农业大学,以构建更加科学合理的培养模式为目标,对动物医学专业本科学生实践创新能力培养方式进行了探索。在改革中：①充分利用校内外实习基地,采用“校内+校外”的实习模式,将企业单位引入实践教学中;②通过综合实践活动和积极参与第二课堂来促进本科学生科学探究能力的提升,利用这种课内教育和课外教育的相互融合来加强学生实践创新能力的培养;③加强毕业论文环节中对动物医学专业本科生实践创新能力的培养;④推进我院教学方法的改革、营造学术氛围,以多样的创新人才培养方式作为辅助手段。通过一系列改革将实践创新教育与专业教学融为一体,有利地推进了学生创新意识、实践技能、社会交往能力的培养。     

不同决明品种（系）的耐铝毒能力研究

在铝浓度60mg／L下,对10个不同决明品种（系）进行液培。通过农艺性状、主根伸长率、株高增长率、根系电导率、根系活力和脯氨酸含量变化测定,研究不同决明牧草品系的耐铝毒能力。试验结果表明,86134R2、86134RI、86134113、2204、92985R1属于耐铝毒的决明品种（系）;34721R1、34721R2、34721F4、92985R2决明品种（系）耐铝毒能力中等;34721F7属于铝敏感决明品系。     

甘草提取物对甘草内生真菌G11的生长及产甘草酸能力的影响

将产甘草酸的甘草内生真菌G11在甘草提取物中培养,观察了其生长及次级代谢产物。结果表明,在发酵培养基中加入2.0%甘草提取液可提高菌株产甘草酸的能力;在固体培养基中加入3.0%甘草提取液时,该菌株菌丝体长势最好,生长速度最快。     

大学生信息素质教育与创新能力的培养

在明晰信息素质教育与创新能力内涵的基础上,深入探讨信息素质教育与创新能力的关系,找出了大学生信息素质教育与创新能力培养中存在的问题,并针对存在的问题,提出促进大学生信息素质教育和创新能力培养的措施。     

Competitive interactions of fifty barley cultivars with Avena sterilis and Asperugo procumbens

A 2-year study was conducted in northern Greece to assess the ability of 29 six-row and 21 two-row barley (Hordeum vulgare L.) cultivars to compete with winter wild oat [Avena sterilis spp. ludoviciana (Durieu) Gill & Magne] and German-madwort (Asperugo procumbens L.). The fresh weight of both weeds grown in competition with six of the most competitive six-row barley cultivars (Bulk Resist. Desc-Sutter, Lignee 640, Paico's, Mantnan's-EH 165, Pistacho and Malebo) was reduced by 61–75% compared with one of the least competitive six-row cultivars [Gloria's-Copal's (30B-4Y-20M)]. The corresponding fresh weight reduction of both weeds grown in competition with three of the most competitive two-row barley cultivars (Goldmarker, Shanon and Helena) ranged from 59 to 76% compared with one of the least competitive two-row cultivars (Guanajuato). The ability to withstand competition (AWC) from winter wild oat and German-madwort of the six-row and two-row cultivars ranged from 33.7 to 78.3% and 26.7 to 69.2%, respectively. Representative yield losses ranged from 24 to 68% and 30 to 75%, respectively. The corresponding ability to compete (AC) indices ranged from 22.5 to 64.8% and 21.1 to 59.1%. The results of this study indicated that the barley cultivars Ligne 640 and Pistacho (2B-1Y-1B) had high AWC from winter wild oat and German-madwort and provided high grain yield in both weedy and weed-free conditions. Consequently, they could successfully be used in Mediterranean organic (no herbicide use) and conventional agricultural systems with reduced herbicide use. Barley cultivars with high AC and ability to produce high grain yield under weedy conditions [with Bulk Resist. Desc-Sutter, Arupo's and Gloria's-Copal's (30B-4Y-23M) among the most efficient] could also successfully be used in organic fields infected by the two weeds.     

单片机课程的教学改革

单片机是一门综合性和实践性很强的课程。本文结合该课程特点及作者的教学实践,对高职单片机课程的教学改革进行了实践与探讨。