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Enhanced potassium storage of carbon nanofibers as binderfree anodes enabled by coupling ultra-small amorphous Sb_(2)O_(3),graphene modification and sulfur doping

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Rare Metals 2024年第1期43卷 51-64页

作者： Zhao Huang Yu-Kang Lou lin peng Yuan peng Meng-Meng Wang Ming Zhang College of Railway Transportation Hunan University of TechnologyZhuzhou 412007China College of Semiconductors(College of Integrated Circuits) Changsha Semiconductor Technology and Application Innovation Research InstituteHunan UniversityChangsha 410082China Key Laboratory for Micro-Nano Optoelectronic Devices of Ministry of Education College of Semiconductors(College of Integrated Circuits)Hunan UniversityChangsha 410082China

Considering the intrinsic advantages of natural copiousness and cost-effectiveness of potassium resource,potassium-ion batteries(KIBs) are booming as prospective alternatives to lithium-ion batteries(LIBs) in large-scale energy storage scenarios. Nevertheless, lacking desirable electrodes for reversibly hosting the bulky K+hinders the widespread application of KIBs, and it needs to be urgently solved. Hereon, the porous S-doped Sb_(2)O_(3)-graphene-carbon(SAGC) nanofibers are manufactured through an adjustable and facile approach, which involves electrospinning, in situ etching and sulfuration. The synthesized SAGC is featured by the ultra-small amorphous Sb_(2)O_(3) homogeneously wrapped inside the carbon matrix, as well as the co-incorporation of graphene and sulfur. Tentatively,the SAGC nanofiber sheets are applied as binder-free anodes for KIBs, exhibiting a prominent cycling life(256.72 m Ah·g^(-1) over 150 cycles at 100 m A·g^(-1)) and rate·g^(-1) over 100 cycles at 1 A·g^(-1)). The positive synergy among all the active components accounts for the distinguished performances of the SAGC. By reinforcing the tolerability to the swelling stress, producing the valid electrochemical active sites, and promoting the charge transferring for reversible K+uptake, the SAGC finally renders the excellent cyclability, capacity, and rate capability. Moreover, the extrinsic electrochemical pseudocapacitance characteristics induced by the porous carbon substrate elevate the K-storage capacity of the SAGC as well. It is hoped that the conclusions drawn may offer new insights into a direction for the high-performance binderfree KIB anodes.

关键词： S-doped Sb_(2)O_(3)-graphene-carbon Nanofibers Binder-free Anodes Potassium-ion batteries

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Distribution of per-and polyfluoroalkyl substances in blood,serum,and urine of patients with liver cancer and associations with liver function biomarkers

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Journal of Environmental Sciences 2024年第5期139卷 418-427页

作者： Cao Dai lin peng Yanjie Li Zhendong Li Da Chen Fei Wang Nan lin Department of Hepatobiliary Surgery The Third Affiliated Hospital of Sun Yat-sen UniversityGuangzhou 510630China School of Environment Guangdong Key Laboratory of Environmental Pollution and HealthJinan UniversityGuangzhou 510632China State Key Laboratory of Environmental and Biological Analysis Department of ChemistryHong Kong Baptist UniversityHong Kong 999077China South China Institute of Environmental Sciences MEEGuangzhou 510655China

Studies have shown that per-and polyfluoroalkyl substances(PFASs)may be hepatotoxic in animals or ***,data on clinical epidemiology are very *** this study,21PFASs were determined in patients with liver diseases,with the highest median concentrations detected in the serum sample(26.7 ng/mL),followed by blood(10.7 ng/mL)and urine(5.02 ng/mL).Higher total PFAS concentrations were found in hepatocellular carcinoma(HCC)patients compared to non-HCC patients,with significant discrepancies in serum and blood ***,significant correlations were also found among PFAS concentrations and age,gender,body mass index(BMI),and liver function biomarkers *** example,PFAS concentrations are significantly higher in males than in females;Several serum PFASs concentrations increase with age and BMI,while the serum perfluorohexane sulfonic acid(PFHxS)concentrations are negatively correlated with *** addition,multiple regression models adjusted for age,gender and BMI found that increased serum perfluorobutane sulfonic acid(PFBS),perfluoroheptane sulfonic acid(PFHpS)and perfluorohexylphosphonic acid(PFHxPA)conentrations are correlated with elevated alkaline phosphatase(ALP),aspartate aminotransferase(AST),and alpha-fetoprotein(AFP)(plinical hepatotoxicity of PFAS.

关键词： Per-and polyfluoroalkyl substances(PFASs) Liver cancer Serum Blood Urine Liver function biomarkers

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Unmanned autonomous air-to-air refueling intelligent docking technology

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Chinese Journal of Aeronautics 2024年第5期37卷 1-5页

作者： peng lin Yakun HE Yuanze CHEN Chinese Aeronautical Establishment Beijing 100029China

Unmanned autonomous Air-to-Air Refueling(AAR)capability is the key guarantee to support the distant-field,high-intensity and durable operations of the penetration counterair combat *** the future,the long-range unmanned reconnaissance and attack platform can reach the maximum flight range requirement through *** present,large transport aircraft platforms in China are still equipped with probe-and-drogue systems,and the refueling mode is gradually changing from manned to unmanned autonomous *** docking process is the riskiest and most important part,and there are strict safety,precision,and efficiency requirements for refueling operation,especially during close-distance docking and formation maintenance *** this paper,five issues that need to be solved to achieve autonomous AAR docking are *** this basis,five key technology development needs are proposed to solve these engineering ***,some prospects are given.

关键词： Air-to-air refueling Probe-and-drogue Unmanned aerial vehicles Docking Perception Collaborative control

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Low-temperature NH_(3) abatement via selective oxidation over a supported copper catalyst with high Cu^(+) abundance

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Journal of Environmental Sciences 2024年第9期143卷 12-22页

作者： Zhiming Yang lin peng Leneng Yang Mingli Fu Daiqi Ye Peirong Chen Guangdong Provincial Key Laboratory of Atmospheric Environment and Pollution Control National Engineering Laboratory for VOCs Pollution Control Technology and EquipmentSchool of Environment and EnergySouth China University of TechnologyGuangzhou 510006China Guangdong Chengyi Environmental Technology Corp. Shaoguan 512158China

Selective catalytic NH_(3)-to-N_(2) oxidation(NH_(3)-SCO)is highly promising for abating NH_(3) emissions slipped from stationary flue gas after-treatment *** practical application,however,is limited by the non-availability of low-cost catalysts with high activity and N_(2) ***,using defect-rich nitrogen-doped carbon nanotubes(NCNT-AW)as the support,we developed a highly active and durable copper-based NH_(3)-SCO catalyst with a high abundance of cuprous(Cu^(+))*** obtained Cu/NCNT-AW catalyst demonstrated outstanding activity with a T_(50)(*** temperature to reach 50% NH_(3) conversion)of 174℃ in the NH_(3)-SCO reaction,which outperformed not only the Cu catalyst supported on N-free O-functionalized CNTs(OCNTs)or NCNT with less surface defects,but also those most active Cu catalysts in open *** kinetics measurements and temperature-programmed surface reactions using NH_(3)as a probe molecule revealed that the NH_(3)-SCO reaction on Cu/NCNT-AW follows an internal selective catalytic reaction(i-SCR)route involving nitric oxide(NO)as a key *** to mechanistic investigations by X-ray photoelectron spectroscopy,Raman spectroscopy,and X-ray absorption spectroscopy,the superior NH_(3)-SCO performance of Cu/NCNT-AW originated from a synergy of surface defects and ***,surface defects promoted the anchoring of Cu O nanoparticles on N-containing sites and,thereby,enabled efficient electron transfer from N to Cu O,increasing significantly the fraction of SCR-active Cu^(+)sites in the *** study puts forward a new idea for manipulating and utilizing the interplay of defects and N-dopants on carbon surfaces to fabricate Cu^(+)-rich Cu catalysts for efficient abatement of slip NH_(3)emissions via selective oxidation.

关键词： NH_(3)-SCO XANES Localized etching N-doping N_(2) selectivity i-SCR

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金属层状复合材料的力学行为及微观变形机理

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中国材料进展 2024年第1期43卷 24-34,11页

作者：姜爽贾楠 peng lin Ru 东北大学材料电磁过程研究教育部重点实验室辽宁沈阳110819 东北大学材料科学与工程学院材料各向异性与织构教育部重点实验室辽宁沈阳110819 林雪平大学工程材料系瑞典林雪平58183

金属层状复合材料作为一种典型的非均质材料,通过调控其内部的多尺度微结构特性,可以实现金属结构材料强度-韧性的协同提升,在高端先进制造领域具有潜在的应用前景。金属层状复合材料的宏观力学性能显著依赖于各组元层的性能、厚度和异... 详细信息

金属层状复合材料作为一种典型的非均质材料,通过调控其内部的多尺度微结构特性,可以实现金属结构材料强度-韧性的协同提升,在高端先进制造领域具有潜在的应用前景。金属层状复合材料的宏观力学性能显著依赖于各组元层的性能、厚度和异质界面的结构特性。变形过程中材料内部的微观应力/应变在异质界面处的协调特性对组元金属的形变微观机制产生重要影响,进而影响复合材料整体的性能。因此,探索金属层状复合材料的“微观结构-力学行为-变形机制-宏观力学性能”的内在关联并揭示其对应的微观形变机理,对设计具有优异综合力学性能的金属层状复合材料有重要的理论指导意义和实际应用价值。聚焦于晶态金属层状复合材料的微观力学行为及变形机理,介绍了其力学行为的尺寸与界面效应,着重讨论了室温下材料的微观形变物理过程,阐明了非均匀金属层状复合体强韧化的机理。最后,对金属层状复合材料力学行为的研究进行了简要展望。

关键词：金属层状复合材料塑性变形微观力学行为变形机制异质界面强韧化机制

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基于沉积学原理的被动陆缘陆坡古地貌恢复方法

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石油物探 2024年第2期63卷 503-516页

作者：蔺鹏中国石油辽河油田分公司勘探开发研究院辽宁盘锦124010 中国石油大学(北京)地球科学学院北京102249

深入了解被动陆缘陆坡古地貌如何控制深水重力流储层的形成与分布对深水油气勘探意义重大。在少井探区,基于三维地震的地层厚度印模法在古地貌研究中应用广泛,但是,陆坡区容易因沉积物供给不足而处于“半饥饿欠补偿”状态和陆坡地形坡... 详细信息

深入了解被动陆缘陆坡古地貌如何控制深水重力流储层的形成与分布对深水油气勘探意义重大。在少井探区,基于三维地震的地层厚度印模法在古地貌研究中应用广泛,但是,陆坡区容易因沉积物供给不足而处于“半饥饿欠补偿”状态和陆坡地形坡度的存在会影响该方法的适用性和准确性,对沉积体系和油气储层的分布特征分析产生不利影响。为此,根据沉积型陆坡的特点,对地层厚度印模法进行了两方面的补充与改进:其一,通过三维地震资料的分析明确目的层陆坡补偿状态,讨论了地层厚度印模法的适用性;其二,根据研究区陆坡演化过程,以沉积物体积等分方式求取目的层段各层序对应的潜在坡度趋势,基于此实现古陆坡地形坡度校正。利用改进后的方法对非洲西部尼日尔三角洲盆地下陆坡古地貌进行恢复的结果与研究区现有构造演化认识高度一致,符合“构造活动主导地貌特征”这一普遍认识。另外,地震属性刻画出的深水沉积体系分布特征与古地貌恢复结果间存在良好的耦合关系。应用实例证明了改进方法的科学性和研究区古地貌恢复结果的客观性。

关键词：深水岩性油气藏古地貌恢复深水层序古陆坡地形坡度校正陆坡被动陆缘沉积学岩性圈闭

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双重预防机制在高校实验室安全管理中的应用研究

实验室检测

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实验室检测 2024年第6期2卷 77-82页

作者：林鹏岭南师范学院资产与实验室管理处

安全是高校实验室开展教学科研基本保障，以风险分级管控和隐患排查治理为核心的双重预防机制能有效遏制实验室安全事故发生。本文阐述了构建双重预防机制四个阶段，利用作业条件危险性评价法（LEC）对实验室风险进行评价定级，将实验... 详细信息

安全是高校实验室开展教学科研基本保障，以风险分级管控和隐患排查治理为核心的双重预防机制能有效遏制实验室安全事故发生。本文阐述了构建双重预防机制四个阶段，利用作业条件危险性评价法（LEC）对实验室风险进行评价定级，将实验室风险管控的关口前移至风险点分级管控上，筑牢了实验室安全防线。

关键词：双重预防机制风险分级管控隐患排查治理

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Efficacy and safety of targeted therapy plus immunotherapy combined with hepatic artery infusion chemotherapy (FOLFOX) for unresectable hepatocarcinoma

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World Journal of Gastroenterology 2024年第17期30卷 2321-2331页

作者： Zhi-peng lin Xiao-Long Hu Du Chen Da-Bei Huang Xu-Gong Zou Hai Zhong Sheng-Xiang Xu Yuan Chen Xiao-Qun Li Jian Zhang Department of Interventional Medicine Zhongshan People’s HospitalZhongshan 528400Guangdong ProvinceChina

BACKGROUND The advent of cutting-edge systemic therapies has driven advances in the treatment of hepatocellular carcinoma(HCC),and therapeutic strategies with multiple modes of delivery have been shown to be more efficacious than ***,the mechanisms underlying this innovative treatment modality have not been *** To evaluate the clinical efficacy of targeted therapy plus immunotherapy combined with hepatic arterial infusion chemotherapy(HAIC)of FOLFOX in patients with unresectable *** We enrolled 53 patients with unresectable HCC who received a combination of targeted therapy,immunotherapy,and HAIC of FOLFOX between December 2020 and June 2021 and assessed the efficacy and safety of the treatment *** The objective response rate was 60.4%(32/53),complete response was 24.5%(13/53),partial response was 35.9%(19/53),and stable disease was 39.6%(21/53).The median duration of response and median progression-free survival were 9.1 and 13.9 months,*** surgical conversion rate was 34.0%(18/53),and 1-year overall survival was 83.0%without critical complicating diseases or adverse events(AEs).CONCLUSION The regimen of HAIC of FOLFOX,targeted therapy,and immunotherapy was curative for patients with unresectable HCC,with no serious AEs and a high rate of surgical conversion.

关键词： Hepatocellular carcinoma Hepatic arterial infusion chemotherapy Targeted therapy Immunotherapy Adverse events

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Tensor Decomposition-Based Channel Estimation and Sensing for Millimeter Wave MIMO-OFDM V2I Systems

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ZTE Communications 2024年

作者： WANG Jilin ZENG Xianlong YANG Yonghui peng lin LI lingxiang National Key Laboratory of Wireless Communications University of Electronic Science and Technology of China ZTE Corporation State Key Laboratory of Mobile Network and Mobile Multimedia Technology

An integrated sensing and communication (ISAC) scheme for a millimeter wave (mmWave) multiple-input multiple-output orthogonal frequency division multiplexing (MIMO-OFDM) Vehicle-to-Infrastructure (V2I) system is presented， in which both the access point (AP) and the vehicle equip large antenna arrays and employ hybrid analog and digital beamforming structures to compensate the path loss meanwhile compromise between hardware complexity and system performance. Based on the sparse scattering nature of the mmWave channel， the received signal at the AP is organized to a four-order tensor by the introduced novel frame structure. A CANDECOMP/PARAFAC (CP) decomposition-based method is proposed for time-varying channel parameter extraction， including angles of departure/arrival (AODs/AOAs)， Doppler shift， time delay and path gain. Then leveraging the estimates of channel parameters， a nonlinear weighted least-square problem is proposed to accurately recover the location， heading and velocity of vehicles. Simulation results show that the proposed methods are effective and efficient in time-varying channel estimation as well as vehicle sensing in mmWave MIMO-OFDM V2I systems.

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Hounsfield units in assessing bone mineral density in ankylosing spondylitis patients with cervical fracture-dislocation

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World Journal of Clinical Cases 2024年第23期12卷 5329-5337页

作者： Zhong-Ya Gao Wei-lin peng Yang Li Xu-Hua Lu Department of Orthopaedics Shanghai Changzheng HospitalNaval Medical UniversityShanghai 200003China

BACKGROUND Cervical spine fracture-dislocations in patients with ankylosing spondylitis(AS)are mostly unstable and require ***,osteoporosis,one of the comorbidities for AS,could lead to detrimental *** are few accurate assessments of bone mineral density in AS *** To analyze Hounsfield units(HUs)for assessing bone mineral density in AS patients with cervical *** The HUs from C2 to C7 of 51 patients obtained from computed tomography(CT)scans and three-dimensional reconstruction of the cervical spine were independently assessed by two trained spinal surgeons and statistically ***-reader reliability and agreement were assessed by interclass correlation *** The HUs decreased gradually from C2 to *** mean values of the left and right levels were significantly higher than those in the *** the 51 patients,25 patients(49.02%)may be diagnosed with osteoporosis,and 16 patients(31.37%)may be diagnosed with *** The HUs obtained by cervical spine CT are feasible for assessing bone mineral density with excellent agreement in AS patients with cervical fracture-dislocation.

关键词： Hounsfield unit Ankylosing spondylitis Fracture-dislocation Cervical spine Osteoporosis

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