不同作物根系对黑土碳组分及其含量的影响

以黑龙江省寒地黑土为研究对象,通过室内培养试验研究了大豆、玉米、甜菜根系对土壤呼吸释放CO2量、水溶性有机碳、微生物量碳和土壤有机碳含量变化的影响.结果表明:大豆、玉米、甜菜根系普遍提高土壤有机碳含量,但是不同作物根系及根系施用量之间还存在一定的差异,大豆根系要好于玉米根系,而玉米根系明显好于甜菜根系.玉米、大豆、甜菜...     

Woolen Textile Simulation by Synthesis Mapping

This paper proposes a new rapid and efficient method for woolen textile simulation-Cmapping synthesize. This method uses a stochastic function to simulate fuzz on some types of wool textile. The wool yarns are simulated on the basis of Phong illumination model. In order to obtain a visual effect of the wool textile with fuzz, the light intensity of fuzz is synthesized as a color parameter in the Phong illumination model after the yarns have been simulated. The model of woolen textile with fuzz can be built eventually. With synthesis mapping methods, user can choose his favorite fuzz density on the wool by controlling some appropriate parameters.     

PUMA560机构的运动学性能分析

对串联PUMA560机构的运动学性能进行了分析，分别绘出了速度、加速度的性能图谱，从而为该机构的尺寸设计提供理论依据。     

Fluxes of CO2, N2O and CH4 from a typical temperate grassland in Inner Mongolia and its daily variation

Using a dark enclosed chamber technique, the fluxes of CO2, N2O and CH4 from nature and disturbed grassland were measured on the spot in Inner Mongolian Temperate Grassland along the annual rainfall gradient section ranging from 450 to 200 mm. The results showed that the measured mean fluxes of CO2, N2O and CH4 were (1 180.4 ± 308.7), (0.010 ± 0.004) and (- 0.039 ± 0.016) mg·m?2/h, respectively. The decrease of the fluxes of CO2, N2O and CH4 follows with that of annual rainfall gradient in the measurement area. Human activities, such as grazing and reclamation are also critical factors to affect the fluxes of these gases from grassland. Daily continuous measurement of CO2, N2O and CH4 fluxes showed a strong diurnal variation with higher emission in the daytime. A good relationship between the fluxes of CO2, N2O, CH4 and temperature was exposed in this study.     

对高校学生人格转变的研究

人格是一个历史范畴,它的演变历程可分为依附型、独立性、自由型三个阶段。大学生处在人生成长阶段他们的人格是处在健康人格和不健康人格、依附人格和独立人格之间的人格状态,把大学生人格从依附型培养成独立性是高等学校的宗旨和目的。     

高职高专数学教师应用意识的培养

高职高专院校要培养优秀的应用型人才,首先要培养数学教师的数学应用意识.数学应用意识基于迁移、终身教育等理论.数学应用意识的培养方式有两大类:自我充电、学校培训.这样,数学教师的数学应用意识就会逐渐加强.     

论知识经济时代的高职教育改革与发展

提出了创新高职教育思想观念必须强化6种意识,明确了面对知识经济时代高职教育改革的4个主要方面的内容。     

服装款式结构图中多层线型的实现

指出开发服装款式平面结构图中多层线型的重要性。通过对传统服装款式结构图中多层线型的分析，进行了基于B-3次样条函数的曲线拟合，提出了多层线型的两种算法原理。对两种算法特点进行比较，并展现了多层线型的实现效果。这里对服装款式辅助设计的进一步研究及应用推广有着重要意义。     

工业氯乙酸钠的红外光谱法定量分析研究

本文系统地对工业氯乙酸钠含量的红外光谱法进行了研究，建立了适用于工业分析的新方法。目前对氯乙酸钠含量测定未见有统一的标准方法。实验表明，该方法较准确、简单。     

孪生组合恒等式(六)——三角类型

通过形式幂级数的三角运算 ,建立 2个孪生组合恒等式定理 ,并给出具体例子