The degradative characteristics of simazine （SIM）, microbial biomass carbon, plate counts of heterotrophic bacteria and most probably number （MPN） of SIM degraders in uninoculated non-rhizosphere soil, uninoculate...The degradative characteristics of simazine （SIM）, microbial biomass carbon, plate counts of heterotrophic bacteria and most probably number （MPN） of SIM degraders in uninoculated non-rhizosphere soil, uninoculated rhizosphere soil, inoculated non- rhizosphere soil, and inoculated rhizosphere soil were measured. At the initial concentration of 20 mg SIM/kg soil, the half-lives of SIM in the four treated soils were measured to be 73.0, 52.9, 16.9, and 7.8 d, respectively, and corresponding kinetic data fitted first-order kinetics. The experimental results indicated that higher degradation rates of SIM were observed in rhizosphere soils, especially in inoculated rhizosphere soil. The degradative characteristics of SIM were closely related to microbial process. Vegetation could enhance the magnitude of rhizosphere microbial communities, microbial biomass content, and heterotrophic bacterial community, but did little to influence those community components responsible for SIM degradation. This suggested that rhizosphere soil inoculated with microorganisms-degrading target herbicides was a useful pathway to achieve rapid degradation of the herbicides in soil.展开更多
针对联合作战信息交换需求和多军兵种作战数据互联互通问题,采用指挥控制系统与仿真系统之间交互性标准(command and control systems-simulation systems interoperation,C2SIM)标准指导实现指挥控制系统、仿真系统和无人系统之间的高...针对联合作战信息交换需求和多军兵种作战数据互联互通问题,采用指挥控制系统与仿真系统之间交互性标准(command and control systems-simulation systems interoperation,C2SIM)标准指导实现指挥控制系统、仿真系统和无人系统之间的高效互操作。概述C2SIM的地位、作用和开发概况;介绍C2SIM逻辑数据模型开发方法;从C2SIM核心本体、领域本体扩展、本体到XML Schema的转换和参考实现等方面,分析C2SIM的关键技术问题;探讨C2SIM标准在北约近年中实兵演习中的应用情况;总结C2SIM的发展和影响,为我军标准化互操作技术的构建提供方法和技术上的启发和借鉴。结果表明,该研究可有效提高军事信息系统的开发能力和质量。展开更多
为了探究山苍子精油中主要成分的绝对含量,建立了一种气相色谱-质谱/选择离子扫描(gas chromatography mass spectrometry/selective ion monitoring,GC-MS/SIM)方法,对其中主要成分(α-蒎烯、β-蒎烯、D-柠檬烯、1,8-桉叶素、芳樟醇、...为了探究山苍子精油中主要成分的绝对含量,建立了一种气相色谱-质谱/选择离子扫描(gas chromatography mass spectrometry/selective ion monitoring,GC-MS/SIM)方法,对其中主要成分(α-蒎烯、β-蒎烯、D-柠檬烯、1,8-桉叶素、芳樟醇、香茅醛、柠檬醛)进行了定性和定量分析。该方法简便、高效,在25 min内山苍子精油中各成分分离良好。各成分在一定范围内均线性关系良好(R2>0.999),精密度、稳定性及重复性均符合要求,平均加标回收率为93.40%~107.35%。结果表明:该方法符合方法学验证要求,可用于山苍子精油的多成分含量测定,并为其质量评价提供依据。展开更多
Although train modeling research is vast, most available simulation tools are confined to city-or trip-scale analysis, primarily offering micro-level simulations of network segments. This paper addresses this void by ...Although train modeling research is vast, most available simulation tools are confined to city-or trip-scale analysis, primarily offering micro-level simulations of network segments. This paper addresses this void by developing the Ne Train Sim simulator for heavy long-haul freight trains on a network of multiple intersecting tracks. The main objective of this simulator is to enable a comprehensive analysis of energy consumption and the associated carbon footprint for the entire train system. Four case studies were conducted to demonstrate the simulator's performance. The first case study validates the model by comparing Ne Train Sim output to empirical trajectory data. The results demonstrate that the simulated trajectory is precise enough to estimate the train energy consumption and carbon dioxide emissions. The second application demonstrates the train-following model considering six trains following each other. The results showcase the model ability to maintain safefollowing distances between successive trains. The next study highlights the simulator's ability to resolve train conflicts for different scenarios. Finally, the suitability of the Ne Train Sim for modeling realistic railroad networks is verified through the modeling of the entire US network and comparing alternative powertrains on the fleet energy consumption.展开更多
This paper introduces a pioneering application of secondary ion mass spectrometry(SIMS)for estimating the electronic properties of Pb_(1-x)Sn_(x)Te,a compound categorized as a topological crystalline insulator.The pro...This paper introduces a pioneering application of secondary ion mass spectrometry(SIMS)for estimating the electronic properties of Pb_(1-x)Sn_(x)Te,a compound categorized as a topological crystalline insulator.The proposed approach marks the first application of SIMS for such estimations and focuses on investigating variations in ionization probabilities and shifts in the energy distribution of secondary ions.The ionization probabilities are influenced by pivotal parameters such as the material's work function and electron affinity.The derivation of these parameters hinges upon the energy gap's positioning relative to the vacuum level for varying values of within the Pb_(1-x)Sn_(x)Te compound.The findings elucidate noteworthy alterations in SIMS signals,particularly near the critical point of band-gap closing.展开更多
基于SIM908模块设计了一种可以监测用户跌倒情况的智能穿戴设备。设备的主控制器采用ATMEGA128单片机,以SIM908模块为基础,通过ADXL345加速度传感器来监测跌倒事件,采用光电式传感器进行生物数据监测,以了解用户脉搏情况。该穿戴设备实...基于SIM908模块设计了一种可以监测用户跌倒情况的智能穿戴设备。设备的主控制器采用ATMEGA128单片机,以SIM908模块为基础,通过ADXL345加速度传感器来监测跌倒事件,采用光电式传感器进行生物数据监测,以了解用户脉搏情况。该穿戴设备实现了基本的时间显示、监测脉搏、判断跌倒、GPS(global positioning system,全球定位系统)定位、GSM(global system for mobile communications,全球移动通信系统)报警、一键呼救等功能,实用性能好,适用于老人和小孩群体。展开更多
基金This work was supported by the National Key Basic Research Program （973） of China （No. 2002CB410804）the National Natural Science Foundation of China （No. 40201026）.
文摘The degradative characteristics of simazine （SIM）, microbial biomass carbon, plate counts of heterotrophic bacteria and most probably number （MPN） of SIM degraders in uninoculated non-rhizosphere soil, uninoculated rhizosphere soil, inoculated non- rhizosphere soil, and inoculated rhizosphere soil were measured. At the initial concentration of 20 mg SIM/kg soil, the half-lives of SIM in the four treated soils were measured to be 73.0, 52.9, 16.9, and 7.8 d, respectively, and corresponding kinetic data fitted first-order kinetics. The experimental results indicated that higher degradation rates of SIM were observed in rhizosphere soils, especially in inoculated rhizosphere soil. The degradative characteristics of SIM were closely related to microbial process. Vegetation could enhance the magnitude of rhizosphere microbial communities, microbial biomass content, and heterotrophic bacterial community, but did little to influence those community components responsible for SIM degradation. This suggested that rhizosphere soil inoculated with microorganisms-degrading target herbicides was a useful pathway to achieve rapid degradation of the herbicides in soil.
文摘针对联合作战信息交换需求和多军兵种作战数据互联互通问题,采用指挥控制系统与仿真系统之间交互性标准(command and control systems-simulation systems interoperation,C2SIM)标准指导实现指挥控制系统、仿真系统和无人系统之间的高效互操作。概述C2SIM的地位、作用和开发概况;介绍C2SIM逻辑数据模型开发方法;从C2SIM核心本体、领域本体扩展、本体到XML Schema的转换和参考实现等方面,分析C2SIM的关键技术问题;探讨C2SIM标准在北约近年中实兵演习中的应用情况;总结C2SIM的发展和影响,为我军标准化互操作技术的构建提供方法和技术上的启发和借鉴。结果表明,该研究可有效提高军事信息系统的开发能力和质量。
文摘为了探究山苍子精油中主要成分的绝对含量,建立了一种气相色谱-质谱/选择离子扫描(gas chromatography mass spectrometry/selective ion monitoring,GC-MS/SIM)方法,对其中主要成分(α-蒎烯、β-蒎烯、D-柠檬烯、1,8-桉叶素、芳樟醇、香茅醛、柠檬醛)进行了定性和定量分析。该方法简便、高效,在25 min内山苍子精油中各成分分离良好。各成分在一定范围内均线性关系良好(R2>0.999),精密度、稳定性及重复性均符合要求,平均加标回收率为93.40%~107.35%。结果表明:该方法符合方法学验证要求,可用于山苍子精油的多成分含量测定,并为其质量评价提供依据。
基金funded in part by the Advanced Research Projects AgencyEnergy (ARPA-E), U.S. Department of Energy, under award number DE-AR0001471。
文摘Although train modeling research is vast, most available simulation tools are confined to city-or trip-scale analysis, primarily offering micro-level simulations of network segments. This paper addresses this void by developing the Ne Train Sim simulator for heavy long-haul freight trains on a network of multiple intersecting tracks. The main objective of this simulator is to enable a comprehensive analysis of energy consumption and the associated carbon footprint for the entire train system. Four case studies were conducted to demonstrate the simulator's performance. The first case study validates the model by comparing Ne Train Sim output to empirical trajectory data. The results demonstrate that the simulated trajectory is precise enough to estimate the train energy consumption and carbon dioxide emissions. The second application demonstrates the train-following model considering six trains following each other. The results showcase the model ability to maintain safefollowing distances between successive trains. The next study highlights the simulator's ability to resolve train conflicts for different scenarios. Finally, the suitability of the Ne Train Sim for modeling realistic railroad networks is verified through the modeling of the entire US network and comparing alternative powertrains on the fleet energy consumption.
文摘This paper introduces a pioneering application of secondary ion mass spectrometry(SIMS)for estimating the electronic properties of Pb_(1-x)Sn_(x)Te,a compound categorized as a topological crystalline insulator.The proposed approach marks the first application of SIMS for such estimations and focuses on investigating variations in ionization probabilities and shifts in the energy distribution of secondary ions.The ionization probabilities are influenced by pivotal parameters such as the material's work function and electron affinity.The derivation of these parameters hinges upon the energy gap's positioning relative to the vacuum level for varying values of within the Pb_(1-x)Sn_(x)Te compound.The findings elucidate noteworthy alterations in SIMS signals,particularly near the critical point of band-gap closing.
文摘基于SIM908模块设计了一种可以监测用户跌倒情况的智能穿戴设备。设备的主控制器采用ATMEGA128单片机,以SIM908模块为基础,通过ADXL345加速度传感器来监测跌倒事件,采用光电式传感器进行生物数据监测,以了解用户脉搏情况。该穿戴设备实现了基本的时间显示、监测脉搏、判断跌倒、GPS(global positioning system,全球定位系统)定位、GSM(global system for mobile communications,全球移动通信系统)报警、一键呼救等功能,实用性能好,适用于老人和小孩群体。
