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General formation of Prussian blue analogue microtubes for high-performance Na-ion hybrid supercapacitors

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Science China Materials 2020年第5期63卷 739-747页

作者： Xuemin Yin Hejun Li Ruimei Yuan leilei zhang Jinhua Lu State Key Laboratory of Solidification Processing C/C Composites Research CenterNorthwestern Polytechnical UniversityXi’an 710072China

One-dimensional(1D)hollow-structured nanomaterials with desirable compositions have aroused huge attention in the field of electrochemical energy *** the present study,1D hierarchical cobalt hexacyanoferrate(CoHCF)microtubes were initially fabricated using a facile self-templated method with the electrospun polyacrylonitrile(PAN)-cobalt acetate(Co(Ac)2)as *** the chemical reaction was performed between the templates and a potassium ferricyanide solution,the core-shell PANCo(Ac)2@CoHCF nanofibers were successfully ***,the CoHCF microtubes were finally obtained via the selective dissolution of the PAN-Co(Ac)2 *** from the unique structural characteristic,the CoHCF microtubes electrode exhibited prominent electrochemical characteristics in Na2SO4 aqueous electrolyte,including a high specific capacitance of 281.8 F g^-1(at 1 A g^-1),and good rate capability as well as long cycling stability(93%capacitance retention after 5000 cycles).The hybrid supercapacitor assembled with CoHCF microtubes and activated carbon(AC)as the positive and negative electrodes,respectively,exhibited a high energy density of 43.89 W h kg^-1,a power density of 27.78 k W kg^-1,as well as a long cycle *** that this versatile self-templated synthetic strategy could be extended to fabricate other 1D hollow Prussian blue(PB)or its analogues(PBA)with controllable composition,which have a potential application in a range of fields.

关键词： electrospinning microtubes cobalt hexacyanoferrate,hollow structures hybrid supercapacitors

国家棉花产业技术体系科技创新助力新疆巴音郭楞蒙古自治州乡村振兴高质量发展——以孔雀河综合试验站为例

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中国棉花 2024年第9期51卷 59-62页

作者：张磊磊马建新孙绘健鲁伟东韦超盛强何忠盛洪梅新疆巴音郭楞蒙古自治州农业科学研究院/国家棉花产业技术体系孔雀河综合试验站新疆库尔勒841000 巴州检验检测中心新疆库尔勒841000 巴州检验检测中心纤维检测所新疆库尔勒841000

介绍了国家棉花产业技术体系孔雀河综合试验站通过规范棉花品种管理、实施棉花标准化控制、推动科技力量下沉、推动补链延链强链等科技创新助力措施,为新疆巴音郭楞蒙古自治州棉花产业高质量发展注入了新的发展动力,为深入实施乡村振兴... 详细信息

介绍了国家棉花产业技术体系孔雀河综合试验站通过规范棉花品种管理、实施棉花标准化控制、推动科技力量下沉、推动补链延链强链等科技创新助力措施,为新疆巴音郭楞蒙古自治州棉花产业高质量发展注入了新的发展动力,为深入实施乡村振兴战略做出重要的农业科技贡献。

关键词：棉花国家棉花产业技术体系科技创新乡村振兴新疆巴音郭楞蒙古自治州

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Unravelling the genetic basis for skeletal muscle mitochondrial DNA copy number variations in pigs

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Science China(Life Sciences) 2024年第1期67卷 211-214页

作者： Jiawen Yang leilei Cui Yifeng zhang Ziqi Ling Zhou zhang Yizhong Huang Junwu Ma Shijun Xiao Bin Yang Lusheng Huang National Key Laboratory for Swine Genetic Improvement and Germplasm Innovation Jiangxi Agricultural UniversityNanchang 330045China School of Life Sciences Nanchang UniversityNanchang 330047China

Dear Editor,Mitochondria are the center of cellular energy generation and free radical metabolism,with important functions in regulating intracellular calcium levels,cell apoptosis,cell cycle and epigenetic *** DNA copy number(mtDNA-CN)is an indicator of mitochondrial biogenesis and has been associated with several diseases,such as cardiovascular disease,depression,chronic kidney disease and aging in humans(Clyde,2022).

关键词： metabolism cardiovascular diseases

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美国特朗普政府南海政策分析

国际论坛 2019年第1期21卷 88-102,157-158页

作者：张蕾蕾中国政法大学

纵观唐纳德·特朗普执政至今的国内外政策,涉及了政治、经济、国防、移民、外交等诸多问题,体现了"美国优先"的核心思想。与民主党奥巴马政府第一任期希拉里任国务卿时在南海问题上的高调有所不同,共和党特朗普政府在贸易问题上非常高调... 详细信息

纵观唐纳德·特朗普执政至今的国内外政策,涉及了政治、经济、国防、移民、外交等诸多问题,体现了"美国优先"的核心思想。与民主党奥巴马政府第一任期希拉里任国务卿时在南海问题上的高调有所不同,共和党特朗普政府在贸易问题上非常高调,似乎掩盖了其在南海问题上的政策行为,但我们必须认识到特朗普政府在南海问题上的政策表现。这主要包括:南海巡航定期化、频繁化,其捍卫美国在南海的军事行动可置信性的决心并不比前任政府弱;将南海问题与其他问题相挂钩,如南海问题与"美国优先"政策相挂钩,在南海问题、经贸问题、网络安全问题等方面实行挂钩政策;在印太战略背景下,凸显中国在南海的威胁,强化美国既有的安全同盟关系。美国特朗普政府南海政策的实质在于:以航行自由原则维护美国海上霸权;既有对奥巴马政府政策内涵的继承,也打上具有特朗普及其团队行事风格的政策独特性;权力炫耀与对美国的霸权护持。尽管如此,本文通过论证认为,我们仍应看到中美之间相互合作、相互依赖仍是主流,现阶段特朗普政府在南海的行动并不构成"全面遏制中国"的一部分。中国作为负责任的全球新兴大国,应当保持审慎的态度,避免与特朗普政府在南海问题上进行正面冲突,加大经济投入、重点发展海权,强化与南海周边国家的关系,加强海洋法律建设,加强海洋话语权的构建,努力保持战略定力,积极做好应对之策。

关键词：特朗普政府南海问题航行自由美国优先海上霸权护持

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强噪声下结构小损伤检测的小波特征量研究

固体火箭技术 2018年第1期41卷 120-124页

作者：刘鎏张蕾蕾中国航天科技集团公司四院四十一所西安710025 中国航天科技集团公司九院七七一所西安710000

将小波分析用于强噪声背景下的结构小损伤特征量研究,对于含有微小损伤的结构动力学模型,通过改变输入激励获取不同输出信噪比的响应信号,再通过响应信号的小波分解构造反映结构损伤的特征量,同时研究了输出信噪比对结构损伤特征量的影... 详细信息

将小波分析用于强噪声背景下的结构小损伤特征量研究,对于含有微小损伤的结构动力学模型,通过改变输入激励获取不同输出信噪比的响应信号,再通过响应信号的小波分解构造反映结构损伤的特征量,同时研究了输出信噪比对结构损伤特征量的影响。结果表明,在不同的信噪比情况下提取的结构损伤特征信息与信噪比大小呈现出非线性特征。对结构损伤检测的目的而言,存在一个最佳的信噪比,而不是噪声干扰越小越好。

关键词：结构损伤检测小波分析信噪比

Development of a novel critical nitrogen concentration-cumulative transpiration curve for optimizing nitrogen management under varying irrigation conditions in winter wheat

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The Crop Journal 2024年第4期12卷 1242-1251页

作者： Tianyang Ye Yu zhang Jingyan Xuan Xintian Wang Yang Li Junhao Xu Liujun Xiao leilei Liu Liang Tang Weixing Cao Bing Liu Yan Zhu National Engineering and Technology Center for Information Agriculture Engineering Research Center of Smart AgricultureMinistry of EducationKey Laboratory for Crop System Analysis and Decision MakingMinistry of AgricultureJiangsu Key Laboratory for Information AgricultureJiangsu Collaborative Innovation Center for Modern Crop ProductionNanjing Agricultural UniversityNanjing 210095JiangsuChina Institute of Remote Sensing and Digital Agriculture Sichuan Academy of Agricultural SciencesChengdu 610066SichuanChina

Accurate nitrogen(N)nutrition diagnosis is essential for improving N use efficiency in crop *** widely used critical N(Nc)dilution curve traditionally depends solely on agronomic variables,neglecting crop water *** three-year field experiments with winter wheat,encompassing two irrigation levels(rainfed and irrigation at jointing and anthesis)and three N levels(0,180,and 270 kg ha1),this study aims to establish a novel approach for determining the Nc dilution curve based on crop cumulative transpiration(T),providing a comprehensive analysis of the interaction between N and water *** Nc curves derived from both crop dry matter(DM)and T demonstrated N concentration dilution under different conditions with different *** equation Nc=6.43T0.24 established a consistent relationship across varying irrigation *** test results indicated that the nitrogen nutrition index(NNI),calculated from this curve,effectively identifies and quantifies the two sources of N deficiency:insufficient N supply in the soil and insufficient soil water concentration leading to decreased N availability for root ***,the NNI calculated from the Nc-DM and Nc-T curves exhibited a strong negative correlation with accumulated N deficit(Nand)and a positive correlation with relative grain yield(RGY).The NNI derived from the Nc-T curve outperformed the NNI derived from the Nc-DM curve concerning its relationship with Nand and RGY,as indicated by larger R2 values and smaller *** novel Nc curve based on T serves as an effective diagnostic tool for assessing winter wheat N status,predicting grain yield,and optimizing N fertilizer management across varying irrigation *** findings would provide new insights and methods to improve the simulations of water-N interaction relationship in crop growth models.

关键词： Crop dry matter Crop cumulative transpiration Bayesian statistical model Critical nitrogen dilution curve Nitrogen nutrition index

Green Synthesis of Magnetic Adsorbent Using Groundwater Treatment Sludge for Tetracycline Adsorption

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Engineering 2019年第5期5卷 880-887页

作者： Zhan Qu Yaqiong Wu Suiyi Zhu Yang Yu Mingxin Huo leilei zhang Jiakuan Yang Dejun Bian Yi Wang Science and Technology Innovation Center for Municipal Wastewater Treatment and Water Quality Protection Northeast Normal UniversityChangchun 130117China School of Environmental Science and Engineering Huazhong University of Science and TechnologyWuhan 430074China Engineering Lab for Water Pollution Control and Resources Recovery Northeast Normal UniversityChangchun 130117China Guangdong Shouhui Lantian Engineering and Technology Corporation Guangzhou 510075China

Groundwater treatment sludge is an industrial waste that is massively produced from groundwater treatment *** methods for treatment of this sludge,such as discharge into deep wells or the sea,or disposal at landfills,are not environmentally ***,we demonstrate an alternative strategy to recycle the sludge by preparing a magnetic maghemite adsorbent via a one-step hydrothermal method with NaOH solution as the only *** this method,the weakly magnetized sludge,which contained 33.2%iron(Fe)and other impurities(e.g.,silicon(Si),aluminum(Al),and manganese(Mn)),was converted to magnetic adsorbent(MA)with the dissolution of Si/Al oxides(e.g.,quartz and albite)into the liquid *** a NaOH concentration of 2 mol L^-1,approximately 18.1%of the ferrihydrite in the Fe oxides of the sludge was converted into 11.2%maghemite and 6.9%hematite after the hydrothermal ***2(i.e.,MA produced by a 2 mol L^-1 NaOH concentration)exhibited a good magnetic response of 8.2 emu g^-1(1 emu=10^-3 A m^2),and a desirable surface site concentration of 0.75 mmol g^-*** synthesized MA2 was used to adsorb the cationic pollutant tetracycline(TC).The adsorption kinetics of TC onto MA2 fitted well with a pseudo-second-order model,and the adsorption isotherms complied well with the Langmuir *** maximum adsorption capacity of MA2 for TC was 362.3 mg g^-1,and the main mechanism for TC adsorption was cationic *** study is the first to demonstrate the preparation of an MA from recycled sludge without a reductant and/or exogenous Fe *** prepared adsorbent can be used as a low-cost adsorbent with high capacity for TC sorption in the treatment of TC-containing wastewater.

关键词： Groundwater treatment sludge Maghemite Cationic exchange Adsorption Tetracycline

The Characteristics of Mechanical Grinding on Kaolinite Structure and Thermal Behavior

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The Characteristics of Mechanical Grinding on Kaolinite Stru...

TDI-CCD相机的1.06μm激光饱和干扰实验研究

2012 International Conference on Future Energy,Environment,and Materials

作者： Shuli Ding leilei zhang Xiaohui Ren Bohui Xu Hong zhang Fashao Ma Key Laboratory of Resources of Hebei Province Hebei University of Engineering

The relationship between kaolinite structure and the temperature of thermal transformation of phase was discussed in this paper through grinding and heating treatment. The results show that the structure of kaolinite is destroyed rapidly with increasing mechanical grinding time, and the kaolinite structure collapses completely after 1 h grinding. The temperature of thermal transformation of phase decreases with the destruction of kaolinite structure. This result has a great significance for the utilization of kaolinite associated with coal measures in China.

关键词： kaolinite mechanical grinding thermal behavior

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红外与激光工程 2013年第S01期42卷 38-42页

作者：张乐赵威邵铭张雷雷余锋中国人民解放军63880部队国防科学技术大学光电科学与工程学院

激光干扰是对抗成像观瞄设备和精确制导武器,保护己方目标的重要方式。目前,对图像传感器的干扰效果研究主要集中在CCD相机和CMOS相机,对TDI-CCD相机干扰效果的研究较少。为了研究激光对TDI-CCD图像传感器的干扰效果,利用1.06μm高重频... 详细信息

激光干扰是对抗成像观瞄设备和精确制导武器,保护己方目标的重要方式。目前,对图像传感器的干扰效果研究主要集中在CCD相机和CMOS相机,对TDI-CCD相机干扰效果的研究较少。为了研究激光对TDI-CCD图像传感器的干扰效果,利用1.06μm高重频激光开展了对TDI-CCD相机的饱和干扰实验研究。实验中测量并计算了TDI-CCD相机的图像饱和及过饱和激光功率密度阈值,分析计算了饱和干扰象元数与激光入射功率之间的关系,TDI-CCD相机工作行频与干扰效果的关系。解释了副光斑、过饱和现象及圆环状光斑的形成原因。实验结果表明,1.06μm激光对TDI-CCD相机饱和干扰阈值为7.9×10-4W/cm2,过饱和干扰阈值约为4.7 W/cm2,1.06μm激光可作为对抗TDI-CCD相机的有效干扰手段。

关键词：激光干扰 TDI—CCD相机饱和效应阈值