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Vanadium nitride quantum dots@carbon skeleton anode material synthesized via in situ oxidation initiation strategy

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Tungsten 2024年第3期6卷 561-573页

作者： Yi-Han Fu Yuan-You Peng Lei Zhao Tian-Qi He Mei-Mei Yuan hao dang Rui Liu Fen Ran State Key Laboratory of Advanced Processing and Recycling of Non-Ferrous Metals School of Materials Science and Engineering Lanzhou University of Technology

Vanadium nitride（VN） has received significant attention as a potential negative electrode material due to its remarkable theoretical and physical ***,the electrochemical performance needs to be improved due to its low specific surface area and the issue of being easily dissolved in *** have shown that the composite structure of carbon-coated nano sc ale VN particles could significantly increase the specific surface area of VN,and more importantly,and the carbon matrix can effectively restrain the dissolution of VN particles in the electrolyte,thereby improving its chemical and electrochemical performance,including specific capacity and cycling ***,VN quantum dots are synthesized and protected by uniformly coating the carbon skeleton on its surface via an in situ strategy of oxidation initiation,which initiates dopamine polymerization,forming a crystalline complex of polydopamine and *** heat treatment,the product is a composite material with VN quantum dots embedded in the amorphous carbon *** resulting smallsized and crosslinked carbon particles formed a graded pore structure,more reasonable channels provided for electrolyte ions transport *** the composite material was used as the negative electrode material for supercapacitors,it exhibits the specific capacity of 391.9 F·g-1at a current density of 0.5 A·g-1and excellent capacity retention rate of 83.6% after *** synthesis method of this quantum dot could be applied to other metal compounds and has potential applications in catalysis,environmental protection,and other fields.

关键词： In situ initiation Vanadium nitride Quantum dots Anode Supercapacitors

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汗液变化对皮凉鞋摩擦色牢度测试结果的影响

中国皮革 2024年第6期53卷 11-14页

作者：党浩姜灿深圳市计量质量检测研究院广东深圳518131

将人工汗液密封存放和敞口放置进行对比来研究该过程中pH值的变化,并研究工作汗液在浸泡毛毡过程中pH值的变化,通过汗液摩擦色牢度测试来探讨其对试验结果的影响。结果表明,随着时间的延长,密封保存下的汗液pH值略微下降,摩擦色牢度的... 详细信息

将人工汗液密封存放和敞口放置进行对比来研究该过程中pH值的变化,并研究工作汗液在浸泡毛毡过程中pH值的变化,通过汗液摩擦色牢度测试来探讨其对试验结果的影响。结果表明,随着时间的延长,密封保存下的汗液pH值略微下降,摩擦色牢度的测试结果比较稳定。随着时间的延长,敞口放置下的汗液pH值会明显降低,对摩擦色牢度的测试结果影响较大。在重复浸泡毛毡的过程中,工作汗液pH值会逐渐降低,对摩擦色牢度的测试结果有一定影响,在试验过程中不可重复使用来浸泡毛毡。

关键词：摩擦色牢度汗液 pH值皮凉鞋皮革

Parametric formation control of multiple nanosatellites for cooperative observation of China Space Station

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Astrodynamics 2024年第1期8卷 77-95页

作者： hao Zhou Bohan Jiao Zhaohui dang Jianping Yuan School of Astronautics Northwestern Polytechnical UniversityXi’an710072China National Key Laboratory of Aerospace Flight Dynamics Northwestern Polytechnical UniversityXi’an710072China

This study proposes a parametric formation control method for the cooperative observation of the China Space Station(CSS)using multiple ***,a simplified geometrical model of the CSS is constructed using fundamental solids,such as the capsule body and ***,the spacecraft formation configuration for the observation mission is characterized by a three-dimensional(3D)Lissajous curve using related design parameters under the full-coverage observation requirements of specific parts,such as the CSS connecting section and collision avoidance ***,a double-layer control law is designed for each nanosatellite,in which the upper layer is a distributed observer for recognizing the target formation configuration parameters,and the lower layer is a trajectory-tracking controller to make the nanosatellite converge to its temporary target position calculated from the upper layer’s *** closed-loop control stability is proven under the condition that the communication network topology of the nanosatellite cluster contains a directed spanning ***,the control method is verified by numerical simulation,where the CSS connecting section is selected as the observation target,and ten small nanosatellites are assumed to perform the cooperative observation *** simulation results demonstrate that the double-layer control law is robust to single-point communication failures and suitable for the accompanying missions of large space objects with multiple nanosatellites.

关键词： China Space Station(CSS) cooperative observation parametric formation 3D Lissajous curve double-layer system

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稻谷的营养特性及其在家禽生产中的应用

饲料研究 2024年第13期47卷 157-162页

作者：张敏管军军党浩郭琳娜吕泽千梁文静黄培宇河南工业大学生物工程学院河南郑州450000

稻谷在我国种植面积广阔,产量颇丰,是重要的粮食作物,也是一种优质的能量饲料。稻谷含有丰富的碳水化合物、蛋白质、脂肪、维生素和矿物质等营养成分。稻谷陈化后仍具有较高的营养价值,可与其他饲料原料搭配使用,形成均衡的饲料配方,为... 详细信息

稻谷在我国种植面积广阔,产量颇丰,是重要的粮食作物,也是一种优质的能量饲料。稻谷含有丰富的碳水化合物、蛋白质、脂肪、维生素和矿物质等营养成分。稻谷陈化后仍具有较高的营养价值,可与其他饲料原料搭配使用,形成均衡的饲料配方,为家禽提供生长所需的营养。稻谷价格相对低廉,在基础饲粮中替代部分能量饲料如玉米,不仅可以提升家禽的生产效率,还能够促进资源的高效利用,推动畜牧业的可持续发展。近年来,稻谷及陈化稻谷在家禽生产中的应用越来越广泛。文章综述了稻谷和陈化稻谷中优质蛋白质、淀粉和矿物质等营养成分的特点,总结其对家禽的生长性能、产蛋性能、屠宰性能和血液生化指标的影响,旨在为稻谷及陈化稻谷在家禽饲料中的应用提供参考。

关键词：稻谷家禽营养特性生长性能产蛋性能

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Particle size characterization and sources of sediments in the Uzhumqin sand dunes

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Journal of Mountain Science 2024年第8期21卷 2631-2645页

作者： ZHANG hao LIU Yang dang Xiaohong MENG Zhongju LI Shuangli GAO Yong Inner Mongolia Agricultural University Inner Mongolia 010018China Inner Mongolia Autonomous Region Water Resources Research Institute Hohhot 010020China

Sediment constitutes the fundamental basis for forming and evolving aeolian *** characteristics of sediment particle size offer insights into the development and evolution of sandy terrain,making their study critical to understanding aeolian geomorphology and sand *** this study,we combined high-density collection of surface sediments in the Uzhumqin sand dunes and GIS spatial analysis to analyze the particle size parameters and changes in the spatial distribution of surface sediments in this *** addition,we used an end-member analysis to identify the potential sources of the *** results showed that surface sediments in the Uzhumqin sand dunes had distinct spatial *** and coarse grain sands dominated the sediments in the dunes,and the mean grain size and the sorting coefficient generally increased along the prevailing wind direction,with high values in individual areas related to factors such as material sources and vegetation *** was strongly influenced by factors such as landform change and human activity,and spatial variability became more *** and the soil fractal dimension showed generally decreasing trends along the prevailing wind *** dune fixation,the contents of clay and powder particles in the soil increased;the mean particle size,the sorting coefficient,and the fractal dimension of the soil gradually increased,and the skewness and kurtosis gradually *** end-member analysis results indicated the existence of five end-members(EM)in the dune *** 1 was a mixed component of wind-deposited fine sands and nearby fluvial *** 2 was the main component of sediments in the study area and was the result of sorting lake sediments by wind action and by the local *** 3 may be a product of river flood *** 4 and EM 5 had coarser grain *** 4 was a lake-phase sediment product influenced by topographic and vegetation cover factors,and EM

关键词： Sediment Particle size Spatial differences End-member analysis Uzhumqin sand dunes

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河南口岸进口绿豆截获的伪粗野粉蝇鉴定

安徽农业科学 2024年第14期52卷 66-70页

作者：张芳党志浩苗小星范一霖王晓晶高洁张岚唐慧骥郑州海关河南郑州450000

[目的]应用形态学分类和DNA条形码技术鉴定入境绿豆中截获的雌性蝇类。[方法]2023年2月23日,从装载乌兹别克斯坦绿豆的集装箱中截获1只丽蝇科雌虫,对其进行DNA条形码和形态鉴定,并与近似种粗野粉蝇进行形态和条形码比较。[结果]此次截... 详细信息

[目的]应用形态学分类和DNA条形码技术鉴定入境绿豆中截获的雌性蝇类。[方法]2023年2月23日,从装载乌兹别克斯坦绿豆的集装箱中截获1只丽蝇科雌虫,对其进行DNA条形码和形态鉴定,并与近似种粗野粉蝇进行形态和条形码比较。[结果]此次截获蝇类为雌性伪粗野粉蝇,为河南口岸首次截获。[结论]应用DNA条形码与形态分类相结合的方法可以准确快速鉴定蝇类。

关键词：粗野粉蝇伪粗野粉蝇 DNA条形码形态鉴定

Development of a prognostic scoring system for hepatic vena cava Budd-Chiari syndrome with hepatocellular carcinoma

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Hepatobiliary & Pancreatic Diseases International 2024年第4期23卷 370-375页

作者： Sheng-Yan Liu Lu-hao Li Zhao-Chen Liu Su-Xin Li Xiao-Wei dang Department of Hepatopancreatobiliary Surgery the First Affiliated Hospital of Zhengzhou UniversityZhengzhou 450052China Budd-Chiari Syndrome Diagnosis and Treatment Center of Henan Province Zhengzhou 450052China

Background:Hepatocellular carcinoma(HCC)is a serious complication of hepatic vena cava Budd-Chiari syndrome(HVC-BCS)that significantly reduces the survival time of *** study aimed to analyze the prognostic factors influencing the survival of HVC-BCS patients with HCC and to develop a prognostic scoring ***:The clinical and follow-up data of 64 HVC-BCS patients with HCC who received invasive treatment at the First Affiliated Hospital of Zhengzhou University between January 2015 and December 2019 were retrospectively ***-Meier curves and log-rank tests were used to analyze the survival curve of patients and the difference in prognoses between the *** and multivariate Cox regression analyses were performed to analyze the influence of biochemical,tumor,and etiological characteristics on the total survival time of patients,and a new prognostic scoring system was developed according to the regression coefficients of the independent predictors in the statistical *** prediction efficiency was evaluated using the time-dependent receiver operating characteristics curve and concordance ***:Multivariate analysis showed that serum albumin level7 cm(HR=8.623,95%CI:3.771-19.715,P<0.001),and inferior vena cava stenosis(HR=3.612,95%CI:1.646-7.928,P=0.001)were independent predictors of survival.A prognostic scoring system was developed according to the above-mentioned independent predictors,and patients were classified into grades A,B,C and *** differences in survival were found among the four ***:This study successfully developed a prognostic scoring system for HVC-BCS patients with HCC,which is helpful for clinical evaluation of patient prognosis.

关键词： Budd-Chiari syndrome Hepatocellular carcinoma Prognostic factors Inferior vena cava stenosis Prognostic scoring system

High-Al-composition AlGaN/GaN MISHEMT on Si with fT of 320 GHz

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Science China(Information Sciences) 2024年第6期67卷 459-460页

作者： Hanghai DU Lu hao Zhihong LIU Zeyu SONG Yachao ZHANG Kui dang Jin ZHOU Jing NING Zan LI Jincheng ZHANG Yue hao State Key Laboratory of Wide Bandgap Semiconductor Devices and Integrated Technology School of MicroelectronicsXidian University Guangzhou Wide Bandgap Semiconductor Innovation Center Guangzhou Institute of TechnologyXidian University State Key Laboratory of Integrated Services Networks School of Communication EngineeringXidian University

GaN-based metal-insulator-semiconductor high-electronmobility-transistors (MISHEMTs) have many excellent performances compared with the Si and Ga As counterparts,and are prime candidates for applications in communicat...

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香港高校学生工作考察及启示

中国青年研究 2006年第10期 43-45页

作者：党浩西安工程大学校长办公室

本文作者以考察“香港高校的社会工作与青年辅导”为背景,以香港浸会大学为重点,介绍了香港高校的学生事务机构以及学生组织的基本情况,并结合大陆高校的实际情况,提出了若干启示。

关键词：香港高校学生工作启示