Robotic two-wheel-leg-pedrail compound travel mechanism for use in terrain area

本发明涉及特种机器人技术领域，具体地说是一种两轮‑腿‑履带复合型移动机构，包括移动座本体、行走轮、摆腿驱动机构和摆腿组件，两个行走轮安装在移动座本体左右两端，行走轮中内置行走轮驱动电机，在移动座本体前后两侧设有摆腿组件，两个摆腿驱动机构设置于移动座本体上，且移动座本体两侧的摆腿组件通过不同的摆腿驱动机构驱动摆动，位于移动座本体同一侧的摆腿组件通过一个摆腿驱动轴相连，所述摆腿驱动轴通过摆腿驱动机构驱动旋转并带动摆腿组件摆动，摆腿组件上设有履带，且行走轮接触地面转动时，所述履带离开地面，履带接触地面转动时，行走轮离开地面。本发明解决了现有机器人移动机构对于复杂地形的机动灵活性不足和移动效率低等问题

一种燃料电池耗氢技术用于提高扁藻光解海水产氢的方法

本发明涉及绿藻光解水制氢，具体地说是，以具有光解海水产氢功能的海洋绿藻—亚心形扁藻为体系产氢材料，在光反应器上外接碱性氢氧燃料电池持续耗氢系统来维持体系内较低氢分压，依据电路中电子数量与氢原子数的一一对应关系，通过测量电池外电路电流变化来反映体系内氢浓度的变化，研究扁藻在解偶联剂CCCP调控下连续光照和非连续光照产氢过程的特征。在燃料电池持续耗氢下，细胞密度为8×106 cells ml-1，非连续光照(L/D＝9h∶6h)比连续光照产氢时间延长3倍，为120h；氢气产量提高1.6倍，为126ml l-1，且产氢过程中pH值、PSII光化学活性、体外氢酶活性变化有一定的对应关系。本发明实现了对产氢过程高效、灵敏的实时检测，方法简便，在产氢机理和工程基础研究中具有广泛应用前景。带填

围栏封育对新疆亚高山草甸土壤夏季CO_2日排放的影响

利用静态暗箱法在中国科学院新疆巴音布鲁克草原生态站首次对具有代表性的新疆典型性亚高山草甸25年围栏内外土壤CO2日排放进行连续观测。分析了亚高山草甸土壤呼吸变化规律及其影响机制。结果表明,围栏封育后,围栏内土壤CO2日排放总量达到19.117 g.m-2.d-1,围栏外为14.465 g.m-2.d-1,围栏内土壤CO2日排放通量要比围栏外的多了32.16%。浅层土壤土壤温度(包括地表地下5 cm、10 cm土壤温度,p<0.01)与土壤CO2排放通量日变化呈显著正相关性,但15 cm、20 cm和25 cm地温与其无相关性。土壤含水量过低或者过高都会对土壤呼吸有抑制作用,分析发现,土水势在29 kPa~35 kPa时土壤CO2排放通量出现最大值。同时围栏内外土壤CO2排放通量日变化与土水势呈指数相关,其中,围栏内相关系数为0.486 6;围栏外相关系数为0.600 7

Electrocatalytic Reduction of Oxygen on Tungsten Carbide Electrode

以喷雾干燥微球化处理的偏钨酸铵作为前驱体,CO/H2为碳化还原气源,应用固定床气固反应法制备碳化钨(WC)粉体,再以聚四氟乙烯作粘结剂制成碳化钨电极.应用XRD和SEM等表征、观察碳化钨样品,循环伏安和线性扫描法研究硫酸电解液中WC电极的氧还原电催化行为.检测表明,WC为球状颗粒;WC电极对氧还原反应具有较好的电催化活性,硫酸溶液中溶解氧还原反应控制步骤为吸附态(O2-)ads的生成;增加硫酸电解液浓度,开路电位正移,升高温度有利于反应进行.Tungsten carbide(WC) catalysts were prepared by gas-solid reaction using ammonium metatungstate as precursors which were pretreated with spray drying sphere miniaturation,carbon monoxide as carrier gas and hydrogen as deoxidizing gas.The WC electrode was fabricated using WC catalyst powders and PTFE as binding agent,and characterized by XRD and SEM.Electrocatalyst behavior of WC for oxygen reduction reaction in the sulphuric acid solution was studied by steady-state voltammetry and cyclic voltammetry.The results show that the WC powders obtained were in spheric particles and the prepared WC electrode had a good electrocatalyst activity to the oxygen reduction reaction.The electrode reaction was controlled by adsorption.The origination potential of oxygen reduction reaction being more positive,larger electrolyte concentration and higher temperature could promote the reaction.作者联系地址：浙江工业大学化学工程与材料学院绿色化学合成技术国家重点实验室培育基地;Author's Address: Zhejiang University of Technology,School of Materials Science and Engineering,Breeding Base of State Key Laboratory of Green Chemistry-Synthesis Technology,Hangzhou 310032,Chin

一种二维近程微波全息成像方法

本发明公开一种二维近程微波全息成像方法，其通过真实测量或模拟方式获取目标散射场和入射场的参数数据，能够获取更为真实的目标散射场和入射场，从而解决了近程毫米波全息成像技术中假设入射场为球面波或柱面波的不合理性；求解目标图像中利用超定方程组的最小二乘解作为目标函数的二维傅里叶变换，能够扩大成像目标的范围以及提高目标在不同的背景环境下的成像的清晰度和精准度

封育对中天山三种类型草地土壤酶活性的影响/Effects of Fencing Enclosure on Soil Enzyme Activities of Three Kinds in Pasture of Middle Tianshan Mountain[J]

以新疆中天山围封25 a的3种草地土壤为研究对象,以土壤酶活性分析结果为依据,采用常规统计方法对围栏内外土壤酶活性及其与土壤环境因子之间的关系进行了研究.结果表明,3种草地土壤中过氧化氢酶和碱性磷酸酶活性均较低,25 a围栏封育措施可提高围栏内的土壤表层酶活性,但围栏内外酶活性差异不显著；围栏内外酶活性均随土壤深度增加而逐渐降低；土壤酶活性与土壤微生物、土壤含水量、有机质、速效养分含量等指标关系密切,相关性显著(P＜0.05),亚高山草原化草甸酶活性与速效钾的相关性较低；活性与土壤微生物数量之间都有较高的正相关性,尤其是蔗糖酶和过氧化氢酶均与微生物数量相关性显著(P＜0.05)

Measurement of separate electron and positron spectra from 10 to 20 GeV with the geomagnetic field on DAMPE*

The cosmic-ray (CR) electrons and positrons in space are of considerable significance for studying the origin and propagation of CRs. The satellite-borne detector Dark Matter Particle Explorer (DAMPE) has been used to measure the separate electron and positron spectra, as well as the positron fraction. In this study, the Earth's magnetic field is used to distinguish CR electrons and positrons, as the DAMPE detector does not carry an onboard magnet. The energy for the measurements ranges from 10 to 20 GeV, which is currently limited at high energy by the zenith-pointing orientation of DAMPE. The results are consistent with previous measurements based on the magnetic spectrometer by AMS-02 and PAMELA, whereas the results of Fermi-LAT appear to be systematically shifted to larger values