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Geology and mineralization of the Dongping supergiant alkalic-hosted Au-Te deposit(>100 t Au)in Northern Hebei Province,China:A review

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China Geology 2024年第3期7卷 533-550页

作者： shi-min zhen Da-zhao Wang Zhong-jian Zha Hai-jun Bai jiang Wang Development and Research Center of China Geological survey Ministry of Natural ResourcesBeijing 100037China Technical Guidance Center for Mineral Resources Exploration Ministry of Natural ResourcesBeijing 100037China state Key Laboratory of Nuclear Resources and environment East China University of TechnologyNanchang 330013China Institute of Geological surveying and Mapping Technology of Anhui Province Hefei 230022China Third Geological Brigade of Hebei Bureau of Geology and Mineral Resources Zhangjiakou 075000China Ulanqab Real Estate Registration Center Ulanqab 012099China

The Dongping deposit is the largest alkalic-hosted gold deposit in China containing>100 t of *** paper presents a new understanding for Dongping ore system,based on the previous *** mineralization originally occurred at 400-380 Ma,simultaneous with emplacement of the shuiquangou alkaline complex,and was overprinted by the hydrothermal activity in the *** compositions of ores indicate metals of the deposit are mainly provided by the shuiquangou ***-forming fluids are characterized by increasing oxygen fugacity and decreasing sulfur fugacity,while tellurium fugacity increased in the stage II-2 and decreased in stage *** systematic changes are closely related to the processes of mineral precipitation and fluid *** precipitation from stage Ⅰ to stage Ⅱ was triggered by fluid boiling,which leads to the precipitation of Pb-Bi-Te,due to decrement of sulfur *** of gas phase containing high concentration of H_2Te leads to precipitation of Te-Au-Ag minerals and native *** on these hypotheses,this paper present a polyphase metallogenic model as *** the Devonian,fluids were released from alkaline magmas,which carried ore-forming materials form the surrounding rocks and precipitate the early *** the Jurassic-Cretaceous,fluorine-rich fluids exsolved from highly factionated shangshuiquan granite,which extracted and concentrated Au from the shuiquangou complex and the sanggan Group metamorphic rocks,and finally formed the Dongping gold deposit.

关键词： Mineralization and alteration Alkaline intrusion Au deposit Physicochemical conditions Metallogenic model Oxygen fugacity sulfur fugacity Mechanisms of mineral precipitation Fluid boiling Fluorine-enriched fluid Dongping gold deposit North China Craton Mineral exploration engineering

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Recent advances in Fe-N-C single-atom site coupled synergistic catalysts for boosting oxygen reduction reaction

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Electron 2024年第1期2卷 1-38页

作者： Katam srinivas jian zhen Hes.eng Yu Dawei Liu jian zhen Ou Ming‐qiang Zhu Yuanfu Chen school of Integrated Circuit science and engineering and State Key Laboratory of Electronic Thin Films and Integrated DevicesUniversity of Electronic Science and Technology of ChinaChengduSichuanChina College of Mechanical and Electronic engineering Northwest A&F UniversityYanglingChina school of engineering RMIT UniversityMelbourneVictoriaAustralia

Metal-air batteries,fuel cells,and electrochemical H_(2)O2 production currently attract substantial consideration in the energy sector owing to their efficiency and ***,their broader use is hindered by the complex oxygen reduction reaction(ORR)that occurs at cathodes and involves intricate electron *** the significant ORR performance of platinum-based catalysts,their high cost,operational limitations,and susceptibility to methanol poisoning hinder broader *** emphasizes the need for efficient nonprecious metal-based ORR electrocatalysts.A promising approach involves utilizing single-atom catalysts(sACs)featuring metal-nitrogen-carbon(M-N-C)coordination *** offer advantages such as optimal utilization of metal atoms,uniform active centers,precisely defined catalytic sites,and robust metal-support ***,the symmetrical electron distribution around the central metal atom of a single-atom site(M-N4)often results in suboptimal ORR *** challenge can be addressed by carefully tailoring the surrounding environment of the active *** review specifically focuses on recent advancements in the Fe-N4 environment within Fe-N-C *** highlights the promising strategy of coupling Fe-N4 sites with metal clusters and/or nanoparticles,which enhances intrinsic *** capitalizing on the interplay between Fe-N4 sites and associated species,overall ORR performance *** review combines findings from experimental studies and density functional theory simulations,covering synthesis strategies for Fe-N-C coupled synergistic catalysts,characterization techniques,and the influence of associated particles on ORR *** offering a comprehensive outlook,the review aims to encourage research into high-efficiency Fe single-atom sites coupled synergistic catalysts for real-world applications in the coming years.

关键词： electrocatalysis oxygen reduction reaction particle@Fe-N-C single-atom catalysts synergistic catalysts

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Design and Gait Planning of a Worm-inspired Metameric Robot for Pipe Crawling

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Journal of Bionic engineering 2024年第3期21卷 1265-1277页

作者： Yu Liu Qingbiao shi zhen Chen Pen-Tung sah Institute of Micro-Nano science and Technology Xiamen UniversityXiamen361102China

The earthworm has been attracted much attention in the research and development of biomimetic robots due to their unique locomotion mechanism,compact structure,and small motion *** paper presents a new design and prototype of a worm-inspired metameric robot with a movement pattern similar to that of *** robot consists of multiple telescopic modules connected in series through joint *** telescopic module mimics the contraction and elongation motion modes of the earthworm segments.A kinematic and dynamic analysis is conducted on the telescopic module,and an input torque calculation method is provided to ensure sufficient friction between the robot and the pipe *** gait modes of the prototype robot for straight and turning locomotion are introduced,and these modes are extended to robots constructed by different numbers of telescopic *** addition,a method is proposed to increase the friction between the robot and the pipe wall in the aforementioned gait modes without changing the robot structure,thereby improving the robot’s motion ability in *** theoretical model of gait modes has also been validated through gait *** findings of this paper would provide a useful basis for the design,modeling,and control of future worm inspired robots.

关键词： Bio-inspired robot spatial linkage mechanism Kinematics model Peristaltic locomotion

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The Bright single Pulse Emission from PsR B1133+16

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Research in Astronomy and Astrophysics 2024年第4期24卷 253-261页

作者： Jun Tan Zhi-Gang Wen zhen Wang Xue-Feng Duan Hong-Guang Wang Na Wang Vishal Gajjar jian-Ping Yuan Rai Yuen Wen-Ming Yan jian-Ling Chen Wei Han Hui Wang Cheng-Bing Lyu Ai-Jun Dong Maths and Information Technology school Yuncheng UniversityYuncheng 044000China Xinjiang Astronomical Observatory Chinese Academy of SciencesUrumqi 830011China Xinjiang Key Laboratory of Radio Astrophysics Urumqi 830011China school of Physics and Materials science Guangzhou UniversityGuangzhou 510006China space science Laboratory University of CaliforniaBerkeley 94710USA Department of Physics and Electronic engineering Yuncheng UniversityYuncheng 044000China school of Physics and Electronic science Guizhou Normal UniversityGuiyang 550025China

We have conducted a comprehensive investigation into the bright single pulse emission from PsR B1133+16using the Giant Metrewave Radio *** time resolution data(61μs)were obtained at a center frequency of 322 MHz with a bandwidth of 32 MHz over a continuous observation period of 7.45 hr.A total of 1082 bright pulses were sporadically detected with peak flux densities ranging from 10 to 23 times stronger than the average pulse ***,no giant pulse-like emission with a relative pulse energy larger than 10 and extremely short duration was detected,indicating that these bright pulses cannot be categorized as giant pulse *** majority of these bright pulses are concentrated in pulse phases at both the leading and trailing windows of the average pulse profile,with an occurrence ratio of approximately *** pulse energy distribution for all individual pulses can be described by a combination of two Gaussian components and a cutoff power-law with an index of α=-*** updated nulling fraction of 15.35%±0.45% was determined from the energy *** emission of individual pulses follows a log-normal distribution in peak flux density *** is imperative that regular phase drifting in bright pulse sequence is identified in both the leading and trailing components for the first *** physical mechanisms are discussed in detail to provide insights into these observations.

关键词： (stars:)pulsars:general (stars:)pulsars:individual(PsR B1133+16) methods:observational methods:data analysis

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Absence of ultrasonic-vibration-induced plasticity in metallic glacial glasses

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Rare Metals 2024年第7期43卷 3422-3429页

作者： Zhe Chen shuai Ren jian Zhu Jie s.en Xin Li He-Ting Zhang Hong-Ji Lin sajad sohrabi Wen-Qing Ruan zhen-Xuan Zhang Xiong Liang jiang Ma Jun s.en s.enzhen Key Laboratory of High Performance Nontraditional Manufacturing College of Mechatronics and Control EngineeringShenzhen UniversityShenzhen 518060China Institute of Physics Chinese Academy of SciencesBeijing 100190China school of Mechanical Electrical and Information EngineeringShandong UniversityWeihai 264209China

Metallic glasses (MGs) have been found to exhibit unexpected ultrasonic-vibration-induced plasticity (UVIP),which provides a promising way to realize room temperature processing and molding of ***,whether all MGs poss... 详细信息

关键词： glasses metallic plasticity

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Bioinspired polysaccharide-based nanocomposite membranes with robust wet mechanical properties for guided bone regeneration

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National science Review 2024年第3期11卷 215-226页

作者： jian-Hong Xiao zhen-Bang Zhang JiaHao Li si-Ming Chen Huai-Ling Gao YinXiu Liao Lu Chen Zishuo Wang YiFan Lu Yuanzhen Hou HengAn Wu DuoHong Zou shu-Hong Yu Department of Chemistry New Cornerstone Science Laboratory Institute of Biomimetic Materials&Chemistry Anhui Engineering Laboratory of Biomimetic MaterialsDivision of Nanomaterials&Chemistry Hefei National Research Center for Physical Sciences at the Microscale University of Science and Technology of China Department of Dental Implant Center Stomatologic Hospital and College Key Laboratory of Oral Diseases Research of Anhui Province Anhui Medical University CAs Key Laboratory of Mechanical Behavior and Design of Materials Department of Modern Mechanics CAS Center for Excellence in Complex System Mechanics University of Science and Technology of China Department of Oral surgery College of Stomatology National Clinical Research Center for Oral DiseasesShanghai Key Laboratory of Stomatology Shanghai Research Institute of Stomatology Shanghai Ninth People's Hospital Affiliated to Shanghai Jiao Tong University School of Medicine Institute of Innovative Materials(I2M) Department of Chemistry Department of Materials Science and Engineering Southern University of Science and Technology

Polysaccharide-based membranes with excellent mechanical properties are highly desired. However, severe mechanical deterioration under wet conditions limits their biomedical applications. Here, inspired by the structural heterogeneity of strong yet hydrated biological materials, we propose a strategy based on heterogeneous crosslink-and-hydration（HCH） of a molecule/nano dual-scale network to fabricate polysaccharide-based nanocomposites with robust wet mechanical properties. The heterogeneity lies in that the crosslink-and-hydration occurs in the molecule-network while the stress-bearing nanofiber-network remains unaffected. As one demonstration, a membrane assembled by bacterial cellulose nanofiber-network and Ca2+-crosslinked and hydrated sodium alginate molecule-network is designed. studies show that the crosslinked-and-hydrated molecule-network restricts water invasion and boosts stress transfer of the nanofiber-network by serving as interfibrous bridge. Overall, the molecule-network makes the membrane hydrated and flexible; the nanofiber-network as stress-bearing component provides strength and *** HCH dual-scale network featuring a cooperative effect stimulates the design of advanced biomaterials applied under wet conditions such as guided bone regeneration membranes.

关键词： bioinspiration heterogeneous crosslink-and-hydration dual-scale network nanocomposite membrane wet mechanical properties guided bone regeneration

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Ultrasonic vibration enabled under-liquid forming of metallic glasses

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science Bulletin 2024年第2期69卷 163-166页

作者： Xin Li Luyao Li sajad sohrabi Jia'nan Fu zhen Li Zhe Chen Rongce sun Yu Zhang Jinbiao Huang Heting Zhang jian Zhu Xiangyan Chen Kaikai song jiang Ma school of Mechanical Electrical&Information EngineeringShandong UniversityWeihai 264209China state Key Laboratory of Radio Frequency Heterogeneous Integration College of Mechatronics and Control EngineeringShenzhen UniversityShenzhen 518060China Department of Mechanics and Aerospace engineering Southern University of Science and TechnologyShenzhen 518055China s.enzhen Research Institute of shandong University Shenzhen 518057China

Advancements in forming technology offer significant advantages for the manufacturing industry,including enhanced efficiency,energy conservation,and improved material utilization[1].However,traditional additive manufacturing[2],thermoplastic forming[3],and laser cutting[4]encounter challenges when applied in under-liquid environments,mainly due to difficulties in temperature control and heat source provision.

关键词： glasses liquid metallic

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A Novel 3D Gait Model for subject Identification Robust against Carrying and Dressing Variations

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Computers, Materials & Continua 2024年第7期80卷 235-261页

作者： jian Luo Bo Xu Tardi Tjahjadi jian Yi College of Information science and engineering Hunan Normal UniversityChangsha410000China school of engineering University of WarwickCoventryCV47ALUK

subject identification via the subject’s gait is challenging due to variations in the subject’s carrying and dressing conditions in real-life *** paper proposes a novel targeted 3-dimensional(3D)gait model(3DGait)represented by a set of interpretable 3DGait descriptors based on a 3D parametric body *** 3DGait descriptors are utilised as invariant gait features in the 3DGait recognition method to address object carrying and *** 3DGait recognitionmethod involves 2-dimensional(2D)to 3DGaitdata learningbasedon3Dvirtual samples,a semantic gait parameter estimation Long short Time Memory(LsTM)network(3D-sGPE-LsTM),a feature fusion deep model based on a multi-set canonical correlation analysis,and softMax recognition ***,a sensory experiment based on 3D body shape and pose deformation with 3D virtual dressing is used to fit 3DGait onto the given 2D gait images.3Dinterpretable semantic parameters control the 3D morphing and dressing *** degree measurement determines the semantic descriptors of 2D gait images of subjects with various shapes,poses and ***,using the 2D gait images as input and the subjects’corresponding 3D semantic descriptors as output,an end-to-end 3D-sGPE-LsTM is constructed and ***,body shape,pose and external gait factors(3D-eFactors)are estimated using the 3D-sGPE-LsTM model to create a set of interpretable gait descriptors to represent the 3DGait Model,i.e.,3D intrinsic semantic shape descriptor(3Dshape);3D skeleton-based gait pose descriptor(3D-Pose)and 3D dressing with other ***,the 3D-shape and 3D-Pose descriptors are coupled to a unified pattern space by learning prior knowledge from the *** research on CAsIA B,CMU MoBo,TUM GAID and GPJATK databases shows that 3DGait is robust against object carrying and dressing variations,especially under multi-cross variations.

关键词： Gait recognition human identification three-dimensional gait canonical correlation analysis

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endophthalmitis in silicone oil-filled eye: A case report

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World Journal of Clinical Cases 2024年第1期12卷 163-168页

作者： Hui-Chao Yan Ze-Lu Wang Wen-zhen Yu Ming-Wei Zhao jian-Hong Liang Hong Yin Xuan shi Heng Miao Department of Ophthalmology Peking University People’s HospitalBeijing 100044China

BACKGROUND endophthalmitis occurring in silicone oil-filled eyes is a very rare occurrence,with reported incidence rates ranging between 0.07%and 0.039%.Traditional methods of management of infectious.endophthalmitis include the removal of silicone oil,washout of the vitreous cavity,administration of intravitreal antibiotics,and reinjection of silicone *** sUMMARY Herein,we report the case of a 39-year-old man with unilateral endophthalmitis after pars plana vitrectomy and silicone oil *** injections of full-dose antibiotics and anterior chamber washout were used to treat the *** signs of retinal toxicity were observed during the follow-up *** Intravitreal full-dose antibiotic injections and anterior chamber washout are promising alternatives to traditional therapies for endophthalmitis in silicone oilfilled eyes.

关键词： endophthalmitis Intravitreal injection silicone oil-filled eye Pars plana vitrectomy Washout Case report

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Perioperative remedial antiviral therapy in hepatitis B virus-related hepatocellular carcinoma resection:How to achieve a better outcome

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World Journal of Gastrointestinal Oncology 2024年第5期16卷 1833-1848页

作者： Fan Mu Liang-shuo Hu Kun Xu zhen Zhao Bai-Cai Yang Yi-Meng Wang Kun Guo jian-Hua shi Yi Lv Bo Wang Department of Hepatobiliary surgery First Affiliated Hospital of Xi’an Jiaotong UniversityXi’an 710061Shaanxi ProvinceChina Department of Anaesthesiology First Affiliated Hospital of Xi’an Jiaotong UniversityXi’an 710061Shaanxi ProvinceChina Department of Gynaecology Wenzhou Medical University Affiliated Jiaxing Women and Children HospitalJiaxing 314000Zhejiang ProvinceChina

BACKGROUND Although the benefits of antiviral therapy for hepatitis B virus(HBV)-related hepatocellular carcinoma(HCC)have been proven,researchers have not con-firmed the differences in patient outcomes between patients who received preoperative antiviral therapy for a period of time(at least 24 wk)and patients who received remedial antiviral therapy just before radical resection for HBV-related *** To investigate the efficacy of perioperative remedial antiviral therapy in patients with HBV-related *** A retrospective study of patients who underwent radical resection for HBV-related HCC at the First Affiliated Hospital of Xi’an Jiaotong University from January 2016 to June 2019 was *** the history of antiviral therapy,patients were assigned to remedial antiviral therapy and preoperative antiviral therapy *** Kaplan–Meier analysis revealed significant differences in overall survival(Psease-free survival(P=0.035)between the two *** analysis demonstrated that a history of preoperative antiviral treatment was independently related to improved survival(hazard ratio=0.27;95%confidence interval:0.08-0.88;P=0.030).CONCLUsION In patients with HBV-related HCC,it is ideal to receive preoperative long-term antiviral therapy,which helps patients tolerate more extensive hepatectomy;however,remedial antiviral therapy,which reduces preoperative HBV-DNA levels to less than 4 Log10 copies DNA/mL,can also result in improved outcomes.

关键词： Hepatectomy Hepatitis B virus Antiviral therapy Hepatocellular carcinoma Hepatitis B virus-DNA

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