青海特色酸凝牦牛奶酪加工工艺的研究

通过正交实验,研究了灭菌温度、发酵剂添加量、发酵温度、干燥温度四个因素对青海特色酸凝牦牛奶酪的产率和感官评定的影响,得出青海特色酸凝牦牛奶酪加工工艺的最佳条件结果表明：灭菌温度为90℃奶酪的产率最佳,各因素对奶酪感官评定的影响从大到小依次为灭菌温度〉发酵剂的添加量〉干燥温度〉发酵温度,青海特色酸凝牦牛奶酪的最佳加工工艺参数为B,A：D,C：（即灭菌温度为90℃,发酵剂的添加量为4％,干燥温度为70％时,发酵温度为38℃）。     

安溪茶文化旅游资源特色及开发策略

介绍安溪茶文化旅游资源的空间分布和类型,重点分析其主要特色,在研究发展现状及存在问题的基础上,提出针对性地开发策略,为安溪茶文化旅游规划建设提供依据。     

Development and Failure Principle of Differential Weathering Overhanging Rock

Differential weathering overhanging rock by hard rock and soft rock interlayer is common for geological failure.To study the influence of ground stress in rock slope and cave deepness to differential weathering overhanging rock,a mechanical model was proposed.And hollow cylinder stress meter was used to test and analyze on site ground stress at Hongyadong in Chongqing.Moreover, the development range of overhanging rock was determined.And a case studywas used to analyze the relationship among tension ground stress, cave deepness and growth of controlling crack.A method for forecasting overhanging rock failure pattern was proposed.     

Numerical simulation on galloping of iced donductors

To investigate galloping of iced conductors, with the release of the bending degree of freedom of Euler beam element and setting the material to be ‘No Compression’ in ABAQUS software, a cable element with torsion degree of freedom is obtained. And then the aerodynamic loads including drag, lift and torque on the iced conductor are simulated by means of the user defined element. The galloping of iced single conductor and iced twin bundle conductor are numerically analyzed to demonstrate the efficiency of the proposed method. The effects of initial attack angle,span length and initial tension in conductor on the behavior of galloping are investigated by numerical simulation.     

Analysis on braking control strategy of heavy vehicles with AMT

According to kinetic analysis, we put forward a braking control strategy under the down shift condition. When auxiliary engine brake torque affects the stability of vehicle, it should disconnect the clutch; and when auxiliary engine brake torque doesn’t affect the stability of vehicle, it should jointing the clutch. The speed acceleration, the braking time, and the braking distance are analyzed in while the clutch and joint the clutch are disconnect. The analysis indicates that when auxiliary engine brake torque doesn’t affect the stability of vehicle, jointing the clutch can reduce the braking time and distance obviously.     

自然保护区开展公众教育的策略——以太白山自然保护区为例的实证分析

随着自然保护事业的发展,公众宣传教育在自然保护区的各项工作中显得愈来愈重要,并已逐步成为自然保护区的一项主要工作.本文针对太白山自然保护区面临的主要问题,分析了保护区开展公众宣传教育的优势和不足,提出了自然保护区开展公众教育的策略.     

Evaluation of the Effect of Sprout Soybeans on the Iron Status of Anemic Adolescent Girls in Rural China

Plant Foods for Human Nutrition - Soybeans are a major source of nonheme iron in Chinese diet. Germination is considered to be effective in improving iron bioavailability in soybeans. The study is...     

沙生灌木基精细林产化工材料研究进展

沙生灌木为我国西部干旱、半干旱地区储量丰富的生物质资源。归纳总结了近年来我国沙生灌木资源在纳米纤维素材料、活性炭材料、木质资源液化产物以及生物质炭等精细林产化工材料领域的研究现状,并对相关领域的发展趋势进行了展望。     

2007—2017年呼伦贝尔沙地植被覆盖度变化及驱动因素研究

利用呼伦贝尔沙地及周边区域2007-2017年生长期遥感和气象数据,结合第五次全国荒漠化和沙化监测数据,对区域内植被覆盖度变化及气候因素的响应进行了研究。结果表明:2007—2017年呼伦贝尔沙地植被覆盖度呈现先上升后下降的趋势,2007-2013年植被覆盖度呈现整体增加的趋势,年均增加2.76%,显著增加的区域所占面积比例为20.52%,2013—2017年植被覆盖度呈现整体下降的趋势,年均下降6.57%,显著下降的区域所占面积比例为15.69%;区域植被覆盖度年际变化与降水量呈现显著正相关关系,与温度呈现非显著性负相关关系,与日照的相关性不明显。     

黄河滩区不同刈割期对热研4号王草生产性能和品质的影响

为了找到热研4号王草(Pennisrtum purpureumxp typhoidevm‘Reyan No.4’)在河南省黄河滩区营养和产量俱佳的刈割利用方式,从苗高80cm开始,在留茬15~20cm的情况下,采用每隔30d、40d、60d和全年1次性的刈割方式,研究不同刈割方式对王草生长、产量和营养水平的影响,为当地草食家畜的发展提供优质且稳定的饲草。研究表明:刈割会限制茎长,增加茎粗,有利于植株的分蘖及降低倒伏率;过频刈割会降低茎叶比(S/L ratio),叶面积指数(LAI)和生长速度,不利于饲草生产;适度的刈割有利于提高鲜干比(F/D ratio)、单株分蘖数和生长速度,有利于牧草的高产。另外,刈割次数对热研4号王草粗蛋白质和粗纤维含量有显著影响,而对粗脂肪、粗灰分和无氮浸出物含量影响不显著,多次刈割会提高粗蛋白质含量、降低粗纤维含量,每隔30d与40d刈割1次与1年仅割1次相比,粗蛋白质含量分别提高5.47%(P0.05)和2.80%,粗纤维含量分别降低6.67%(P0.05)和5.54%(P0.05),而每隔60d刈割1次和1年仅割1次相比,饲草营养没有显著差异。综合评价结果表明:每隔60d刈割1次,一年刈割2次,留茬15~20cm,牧草生长良好,粗蛋白质含量可达到13.01%,全年产草量达到29.83tDM·hm-2,均达到理想水平。