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In situ preparation of visible-light-driven carbon quantum dots/NaBiO3 hybrid materials for the photoreduction of Cr(Ⅵ)

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Journal of Environmental Sciences 2021年第1期33卷 100-109页

作者： Yixiao Wu Chunlong Chen Shu He Xuesong Zhao Shaobin Huang gongchang zeng Yingying You Ying Cao Lishan Niu School of Environment and Energy South China University of TechnologyHigher Education Mega CenterGuangzhou 510006China Qiannan Normal University for Nationalities Duyun 558000China Physical Sciences Division Physical and Computational Sciences DirectoratePacific Northwest National LaboratoryRichlandWA 99354USA Department of Chemical Engineering University of WashingtonSeattleWA 98101USA School of Enuironment Higher Education Mega CenterHarbin Institute of TechnologyHarbin 150000China

In this study,different carbon quantum dots(CQDs)/NaBiO3 hybrid materials were synthesized as photocatalysts to effectively utilize visible light for the photocatalytic degradation of contaminants *** hybrid materials exhibit an enhanced photocatalytic reduction of hexavalent chromium(Cr(Ⅵ))in the aqueous ***-dimensional nanoparticles of CQDs were embedded within the two-dimensional NaBiO3 nanosheets by the hydrothermal *** with that of the pure NaBiO3 nanosheets,the photocatalytic performance of the hybrid catalysts was significantly high and 6 wt.%CQDs/NaBiO3 catalyst exhibited better photocatalytic *** performed the first-principles density functional theory calculations to study the interfacial properties of pure NaBiO3 nanosheets and hybrid photocatalysts,and confirmed the CQDs played an important role in the CQDs/NaBiO3 *** experimental results indicated that the enhanced reduction of Cr(Ⅵ)was probably due to the high loading of CQDs(electron acceptor)on NaBiO3,which made NaBiO3 nanomaterials to respond in visible light and significantly improved their electron-hole separation efficiency.

关键词： Carbon quantum dots/NaBiO3 Hybrid materials Visible light response Cr(Ⅵ)reduction

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A global path planning algorithm based on the feature map

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IET Cyber-Systems and Robotics 2022年第1期4卷 15-24页

作者： gongchang Ren Peng Liu Zhou He College of Mechanical and Electrical Engineering Shaanxi University of Science and TechnologyXi'anChina School of Electrical and Control Engineering Shaanxi University of Science and TechnologyXi'anChina

The feature map is a characteristic of high computational efficiency,but it is seldom used in path planning due to its lack of expression of environmental *** solve this problem,a global path planning algorithm based on the feature map is proposed based on the directionality of line segment ***,the robot searches the path along the direction of the target position but turns to search in the direction parallel to the obstacle,which it approaches until the line between the robot and the target position does not intersect with *** it turns to the target position,keep searching the ***,the problems of the direction selection of turning point,corner point and obstacle circumvention in the searching process are analysed and corresponding solutions are put ***,a path optimisation algorithm with variable parameters is proposed,making the optimised path shorter and *** experiments demonstrate that the proposed algorithm is superior to A*algorithm in terms of computation time and path length,especially of the computation efficiency.

关键词： A*algorithm feature map global path planning path optimisation variable parameters

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Studies on Amylase and Degradation of Starch and Pigment of Tobacco Leaf During Process of Flue-Curing

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Agricultural Sciences in China 2004年第12期3卷 931-936页

作者： gongchang-rong YUANHong-tao CHENJiang-hua SONGZhao-peng HenanAgriculturalUniversity Zhengzhou450002P.R.China HubeiTobaccoProduction＆SalesCorporation Wuhan453000P.R.China ChinaNationalTobaccoLeafCorporation Beijing100055P.R.China

The changes in the activity of amylase and amylase-isoenzyme and the degradation of starch and pigment of tobacco leaf during flue-curing were studied by using the electric- heated flue-curing barn designed and made by the Henan Agricultural University. The temperature and humidity of the barn were controlled automatically. The results indicated that starch in tobacco leaf decreased rapidly and leveled off after 48 h of curring, in the meantime, the content of soluble sugar increased accordingly and reached a peak at the stage of color-fixing. Both of them had a rapid-changing stage in the first 36 hours of yellowing. The changes of starch and soluble sugar contents had highly significant negative-correlation at 1 % level (rNC89 = -0.8962**, rYY85 = -0.9704**). The activity of amylase increased with the proceeding of curing and reached a peak after 36 hours of curing, then decreased. But the activity of amylase kept at a high level when the humidity of curing-environment was very low, even if the tobacco leaf had been dried. The rapid degradation of starch showed a significantly negative correlation with the increase of activity of amylase at 5 % level (rNC89 = -0.8495*, rYY85 = -0.7839*). The degradation of starch and pigment had the same regulation and had highly significant correlation at 1 % level (rNC89= 0.9649**, rYY85= 0.9428**). There were mainly three amylase-isoenzyme bands -A, B, C respectively, in tobacco leaf during flue curing. They were identified as α-AMY, β-AMY, R-AMY, and the activity of β-AMY was the highest. The changes in amylase activity and contents of starch and pigment were affected by the tobacco leaf moisture and environmental humidity during curing.

关键词： Tobacco leaf Flue-curing Starch Amylase Pigment

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Dynamics of Environmental Humidity and Water Content in Tobacco Leaf and Metabolism of Starch During Curing

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Agricultural Sciences in China 2003年第2期2卷 149-153页

作者： gongchang－rong CHENJiang－hua 等 DepartmentofAgriculture HenanAgriculturalUniversityZhengzhou450002P.R.China ChinaNationalTobaccoLeafCorporation Beijing100055P.R.China

Effect of environmental humidity and water content in tobacco leaf on starch metabolism was studied by using the electric-heated auto-controlled flue-curing barn supplied by Henan Agricultural University, China. The results indicated that the degradation of starch and decrease of water content in tobacco leaf during early yellowing at low humidity was the most rapid, and the water loss was the highest while the lowest under high humidity. The duration for starch degradation under low humidity was longer than that of CK. So the starch residue in cured leaf of different treatment took the order of high humidity yellowing treatment> low humidity yellowing treatment > CK. When the leaf water content was decreased to around 50 %, the starch degradation became slow and the content of starch was stable. Starch degradation and decrease of leaf water content was not synchronous. Starch in tobacco leaf during yellowing degraded more rapidly when humidity was decreased at a high speed, but the degradation stopped earlier at late stage. There was a quicker and higher degradation of starch under high environmental humidity. When the humidity decreased to 70 %, the content of starch was stable. The activity of amylase began to decrease when relative humidity was below 75 %, but it kept a high level of activity when the environmental humidity was below 70 %.

关键词： Tobacco leaf Flue-curing Starch Relative humidity Amylase

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Relationship Between LOX Activity, SA and JA Accumulation in Tobacco Leaves Under Water Stress

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Agricultural Sciences in China 2003年第6期2卷 624-628页

作者： gongchang-rong LIYan-mei YANGLi-jun AgriculturalCollege HenanAgriculturalUniversityZhengzhou45000gP.R.China KunmingInstituteofBotany ChineseAcademyofSciencesKunming650g04P.R.China TobaccoCompanyofZhumadianCity Zhumadian463000P.R.China

The relationship between LOX(lipoxygenase)activity, SA(salicylic acid)and JA(jasmonic acid)accumulation was studied in the tobacco leaf under water stress. The result showed that LOX activity and JA content increased simutaneously with losing of water . NDGA(nordihydroguaiaretic),an inhibitor of LOX, inhibited simultaneously both the activity of LOX and the enhancement of JA level under the stress. Likewise, adding LOX to tobacco cell-free system led to the increase of JA content. It suggested that LOX could be a key enzyme in JA biosynthesis under water stress. SA inhibited the enhancement of JA level under the stress.

关键词： Tobacco leaf Lox SA JA Water stress,Cell-free system

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Influence of graphene oxide on electrochemical performance of Si anode material for lithium-ion batteries

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Journal of Energy Chemistry 2016年第5期25卷 817-824页

作者： Wenjing Liu Jinjin Jiang Hao Wang Chunxiao Deng Feng Wang gongchang Peng Chengdu Institute of Organic Chemistry Chinese Academy of Sciences Graduate University of Chinese Academy of Sciences

We have developed a Si/graphene oxide electrode synthesized via ultrasonication-stirring method under alkaline condition. Scanning electron microscopy(SEM), transmission electron microscope(TEM), EDS dot-mapping and high-resolution transmission electron microscopy(HRTEM) results show that Si particles are evenly dispersed on the graphene oxide sheets. The electrochemical performance was investigated by galvanostatic charge/discharge tests at room temperature. The results revealed that Si/graphene oxide electrode exhibited a high reversible capacity of 2825 mAh/g with a coulombic efficiency of 94.6%at 100 mA/g after 15 cycles and a capacity retention of 70.8% after 105 cycles at 4000 mA/g. These performance parameters show a great potential in the high-performance batteries application for portable electronics, electric vehicles and renewable energy storage.

关键词： Si/graphene oxide Electrochemical performance High-performance batteries Capacity retention

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钠导星星群分布对MCAO系统大气层析性能影响研究

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中国激光 2023年第13期50卷 206-214页

作者：黄建王功长重庆工商大学机械工程学院制造装备机构设计与控制重庆市重点实验室重庆400067 中国人民解放军32037部队云南姚安675300

基于钠导星星群的多层共轭自适应光学(MCAO)系统是目前大口径地基望远镜获得大视场高分辨成像质量的关键部分。其中,钠导星数量及排布方式是影响MCAO系统性能的关键参数。为了明确钠导星星群分布对MCAO系统大气层析效果的影响,首先,根... 详细信息

基于钠导星星群的多层共轭自适应光学(MCAO)系统是目前大口径地基望远镜获得大视场高分辨成像质量的关键部分。其中,钠导星数量及排布方式是影响MCAO系统性能的关键参数。为了明确钠导星星群分布对MCAO系统大气层析效果的影响,首先,根据层析的基本原理,建立了MCAO系统层析两层大气湍流的模型。随后,基于OOMAO仿真平台,验证了3颗钠导星星群对两层大气湍流层析结果。最后,利用视场内斯特列尔比的平均值(R_(S))和归一化标准差作为校正效果和均匀性的评价指标,讨论了3~6颗钠导星放置于正多边形顶点或者正多边形顶点结合视场中心的排布方式对湍流层析效果的影响。研究表明,针对丽江高美谷天文台大气条件(550 nm波长大气相干长度为8 cm),10 m口径望远镜视场为1',大气分为两层的情况,当正多边形的半径大于26″时,钠导星的数量达到4颗就能使系统校正后R_(S)(H波段)达到0.45。特别地,采用5颗钠导星放置在正五边形顶点并在视场中心放置1颗钠导星的星群方式层析湍流最优,MCAO系统校正后R_(S)最高,能达到0.53,且系统均匀性较好。

关键词：自适应光学钠导星星群层析多层共轭大口径地基望远镜

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特征地图的室内机器人路径规划融合算法

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计算机科学与探索 2023年第11期17卷 2755-2766页

作者：刘朋任工昌陕西科技大学机电工程学院西安710021

为利用特征地图计算效率高的优点,同时解决传统动态窗口法对全局参数敏感的问题,提出一种基于特征地图的路径规划融合算法。通过给出适用于路径规划的特征地图表达方式,改进机器人与障碍物间距离的计算方法,实现了特征地图中障碍物的检... 详细信息

为利用特征地图计算效率高的优点,同时解决传统动态窗口法对全局参数敏感的问题,提出一种基于特征地图的路径规划融合算法。通过给出适用于路径规划的特征地图表达方式,改进机器人与障碍物间距离的计算方法,实现了特征地图中障碍物的检测;结合爬虫(Bug)算法的基本原理和线段特征的属性,使用搜索优化算法,先搜索全局可行路径,再进行节点优化得到全局最优路径的关键节点,并对内外角点处搜索方向选择、障碍物端点绕行等问题提出了解决方法;针对传统动态窗口法对全局参数敏感性高的问题,分析了目标函数中各参数在路径不同位置对规划路径的影响程度,使用动态参数的方法对原目标函数进行改进;算法融合时,改进方向函数的计算方法,解决了机器人在路径中间节点出现明显减速的问题。经仿真实验验证,搜索优化算法有效,改进后的动态窗口算法降低了参数的敏感性,融合算法在计算效率方面有较大的优势,计算耗时最多减小79.27%,最少减小43.16%,而且机器人移动更平滑。

关键词：路径规划特征地图爬虫算法动态窗口法融合算法

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基于司法大数据的高校纪律处分实证研究——兼论教育法学研究范式的拓展

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复旦教育论坛 2018年第6期16卷 34-41页

作者：王工厂郑州师范学院法律事务研究中心河南郑州450044

长期过于单一、封闭的研究范式已经使教育法学的发展落后于其他部门法,也拉大了它和社会期待之间的距离。实证研究是法学研究的新范式,教育法学的发展更需要拓展研究范式,而司法大数据的建设和完善为教育法学实证研究实现与其他部门法... 详细信息

长期过于单一、封闭的研究范式已经使教育法学的发展落后于其他部门法,也拉大了它和社会期待之间的距离。实证研究是法学研究的新范式,教育法学的发展更需要拓展研究范式,而司法大数据的建设和完善为教育法学实证研究实现与其他部门法的同向同行提供了"弯道"。通过对纪律处分司法审查的简单量化分析可以发现,教育法学实证研究能揭示规范研究所隐匿的问题,细致教育法律、规章、政策的制定,证实或证伪既有认识,甚至获得新的发现,进而为教育法学自身的发展赢得更多的空间。

关键词：纪律处分实证研究教育法学

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基于司法大数据的高校学位授予实证研究——兼论高校学位授予关联行为的规范

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学位与研究生教育 2021年第1期 36-45页

作者：王工厂郑州师范学院法律事务研究中心郑州450044 郑州师范学院社会服务与发展学院郑州450044

梳理司法大数据的样本案例可以发现,尽管形成学位授予讼争的主要原因是违纪行为和学业成绩评定,但学术自治与司法审查的真正张力却是违纪行为关联的正当性;司法审查正试图突破行政诉讼受案范围的限制为受教育者权利提供无漏洞的法律保... 详细信息

梳理司法大数据的样本案例可以发现,尽管形成学位授予讼争的主要原因是违纪行为和学业成绩评定,但学术自治与司法审查的真正张力却是违纪行为关联的正当性;司法审查正试图突破行政诉讼受案范围的限制为受教育者权利提供无漏洞的法律保护。进一步考察涉讼110所高校的学位运行制度,学位授予关联违纪行为的规则普遍存在,但又繁杂失范。由于高校设定的学位授予条件对受教育者权利的实现影响重大,同时也是学术自治的核心内涵之一,因此高校应回应司法审查之扩张趋势,高度重视治理规则的针对性完善,进而形成与司法张力的动态平衡;同时还应坚守学术自治底线,保障自身社会功能的完整实现。

关键词：学位授予违纪行为司法审查实证研究

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