清代勘分中俄边界大臣的一件哈萨克察哈台文文书研究

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创新:人类学本土化的关键——人类学学者访谈录之七

创新是学术研究的基本原则 ,同时也是人类学本土化的关键。发展 2 1世纪的中国人类学和民族学 ,不仅要在理论和方法上创新 ,而且还要综合各国学术传统之长 ,掌握多学科知识。创新需要渊博的知识 ,需要长期不懈的努力。先专后博 ,在研究中不断扩大知识面 ,是治学的方法之一

青海湖区大型底栖动物群落结构与空间分布格局

为了解青海湖大型底栖动物的群落结构特征、空间分布格局及关键驱动力,于2011—2012年分4次对青海湖区主体湖、3个子湖和5条入湖河流进行了系统调查。共采集到底栖动物28个分类单元,隶属于3门5纲15科,主体湖区、咸水和淡水子湖及入湖河流分布有9、5、9和15种;它们的密度分别为455.8、1562.7、741.3和331.2 ind./m2;生物量为1.18、3.70、2.75和4.53 g/m2。优势度分析显示,喜盐摇蚊为主体湖区绝对优势种(占总密度的83.32%)。Surfer模拟显示,主体湖区东南部沿岸带的密度和生物量最高,湖心区最低;高峰值主要出现在布哈河、菜挤河等大型河流入湖的河口附近。CCA分析表明:青海湖区大型底栖动物的分布主要受水体pH、水深、总氮和盐度等环境因子的驱动

Challenges facing soil science: a view from the outside

为了解青海湖大型底栖动物的群落结构特征、空间分布格局及关键驱动力,于2011—2012年分4次对青海湖区主体湖、3个子湖和5条入湖河流进行了系统调查。共采集到底栖动物28个分类单元,隶属于3门5纲15科,主体湖区、咸水和淡水子湖及入湖河流分布有9、5、9和15种;它们的密度分别为455.8、1562.7、741.3和331.2 ind./m2;生物量为1.18、3.70、2.75和4.53 g/m2。优势度分析显示,喜盐摇蚊为主体湖区绝对优势种(占总密度的83.32%)。Surfer模拟显示,主体湖区东南部沿岸带的密度和生物量最高,湖心区最低;高峰值主要出现在布哈河、菜挤河等大型河流入湖的河口附近。CCA分析表明:青海湖区大型底栖动物的分布主要受水体pH、水深、总氮和盐度等环境因子的驱动

Numerical simulation of drop oscillation in AC electrowetting

microscopic model" for the moving contact line. The contact line model developed by Ren et al. [Phys Fluids, 2010, 22: 102103] is used in the simulation. To determine the slip length in this model, we propose a calibration procedure using the experimental data of drop spreading in DC electrowetting. In the simulation, the frequency of input AC voltage varies in a certain range while the root-mean-square value remains fixed. The numerical simulation is validated against the experiment and it shows that the predicted resonance frequencies for different oscillation modes agree reasonably well with the experiment. The origins of discrepancy between simulation and experiment are analyzed in the paper. Further investigation is also conducted by including the contact angle hysteresis into the contact line model to account for the "stick-slip" behavior. A noticeable improvement on the prediction of resonance frequencies is achieved by using the hysteresis model

Measurement of integrated luminosity of data collected at 3.773 GeV by BESIII from 2021 to 2024

We present a measurement of the integrated luminosity e+e- of collision data collected by the BESIII detector at the BEPCII collider at a center-of-mass energy of Ecm = 3.773 GeV. The integrated luminosities of the datasets taken from December 2021 to June 2022, from November 2022 to June 2023, and from October 2023 to February 2024 were determined to be 4.995±0.019 fb-1, 8.157±0.031 fb-1, and 4.191±0.016 fb-1, respectively, by analyzing large angle Bhabha scattering events. The uncertainties are dominated by systematic effects, and the statistical uncertainties are negligible. Our results provide essential input for future analyses and precision measurements