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Borderline Case of Traces and Extensions for Weighted Sobolev Spaces

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Acta Mathematica Sinica,English Series 2023年第9期39卷 1817-1833页

作者： Man Zi Huang Xian Tao Wang Zhuang Wang zhi hao xu MOE-LCSM School of Mathematics and StatisticsHunan Normal UniversityChangsha410081P.R.China

In this paper,we study the traces and the extensions for weighted Sobolev spaces on upper half spaces when the weights reach to the borderline *** first give a full characterization of the existence of trace spaces for these weighted Sobolev spaces,and then study the trace parts and the extension parts between the weighted Sobolev spaces and a new kind of Besov-type spaces(on hyperplanes)which are defined by using integral averages over selected layers of dyadic cubes.

关键词： Sobolev space borderline case trace theorem Besov-type space Muckenhoupt A_p weight

System utility based resource allocation for multi-cell OFDM system

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The Journal of China Universities of Posts and Telecommunications 2010年第2期17卷 14-18,45页

作者： hao zhi-jie xu Xiao-dong Zhao Ying-hong TAO Xiao-feng LI Lin-jun ZHANG Zhong-qi Wireless Technology Innovation Institute Key Laboratory of Universal Wireless Communication Ministry of Education Beijing University of Posts and Telecommunications Beijing 100876 China

Utility based resource allocation strategy in multi-cell orthogonal frequency-division multiplexing （OFDM） system plays a critical role in next generation mobile communication systems. Based on the analysis of risk aversion utility functions, this article proposed the system utility based utility, which is named the customer satisfaction （CS） utility. Compared with the proportional fairness （PF） utility, the CS utility reflects the user demands better, and enables the system to adjust its resource allocation according to both the traffic requirements and the resource situation.

关键词： OFDM resource allocation utility multi-cell

Effect of electrical contact on performance of WSe_(2) field effect transistors

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Chinese Physics B 2021年第6期30卷 684-690页

作者： Yi-Di Pang En-Xiu Wu zhi-hao xu Xiao-Dong Hu Sen Wu Lin-Yan xu Jing Liu State Key Laboratory of Precision Measurement Technology and Instruments School of Precision Instruments and Opto-electronics EngineeringTianjin UniversityTianjin 300072China

Two-dimensional(2 D) transition metal dichalcogenides(TMDCs) such as tungsten diselenide(WSe_(2)) have spead many interesting physical properties, which may become ideal candidates to develop new generation electronic and optoelectronic devices. In order to reveal essential features of 2 D TMDCs, it is necessary to fabricate high-quality devices with reliable electrical contact. We systematically analyze the effect of graphene and metal contacts on performance of multilayered WSe_(2) field effect transistors(FETs). The temperature-dependent transport characteristics of both devices are *** graphene-contacted WSe_(2) FETs are observed with the metal-insulator transition phenomenon which mainly attributes to the ultra-clean contact interface and lowered contact barrier. Further characterization on contact barrier demonstrates that graphene contact enables lower contact barrier with WSe_(2) than metal contact, since the Fermi level of graphene can be modulated by the gate bias to match the Fermi level of the channel material. We also analyze the carrier mobility of both devices under different temperatures, revealing that graphene contact can reduce the charge scattering of the device caused by ionized impurities and phonon vibrations in low and room temperature regions, respectively. This work is expected to provide reference for fabricating 2 D material devices with decent performances.

关键词： two-dimensional materials tungsten diselenide metal-insulator transition Schottky barrier contact

Management of co-occurring intracranial hemorrhage and fatal pulmonary embolism:a case report

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Chinese Medical Journal 2021年第10期134卷 1257-1258页

作者： Cheng-Ying Kong Jun Fu Ning Li zhi-hao xu Department of Pulmonary and Critical Care Medicine The Fourth Affiliated HospitalZhejiang University School of MedicineYiwuZhejiang 322000China Department of intensive Care Unit The Fourth Affiliated HospitalZhejiang University School of MedicineYiwuZhejiang 322000China

To the Editor:Patients with intracranial hemorrhage caused by hemorrhagic stroke,brain trauma,or brain tumor resection are prone to venous thromboembolism(VTE).[1]VTE includes pulmonary thromboembolism(PTE)and deep venous ***,especially high-risk PTE,has a high mortality rate.[2]Coexisting intracranial hemorrhage and high-risk PTE are a clinical *** with high-risk PTE require fibrinolysis;however,recent intracranial hemorrhage is an absolute contraindication to fibrinolysis due to potential fatal recurrent intracranial ***,we present the clinical details of such a patient who was successfully *** work was approved by the ethical committees of the Fourth Affiliated Hospital of Zhejiang University School of Medicine(No.K2020084).

关键词： intracranial hemorrhage embolism

Clinical characteristics of Chlamydia psittaci pneumonia

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Chinese Medical Journal 2021年第3期134卷 353-355页

作者： Cheng-Ying Kong Jun Zhu Jing-Jing Lu zhi-hao xu Department of Pulmonary and Critical Care Medicine The Fourth Afﬁliated HospitalZhejiang University School of MedicineYiwuZhejiang 322000China

Psittacosis is a zoonosis caused by Chlamydia psittaci,a Gram-negative intracellular *** condition is caused by the ingestion of contaminated fecal matter and nasal secretions from infected *** severity of human psittacosis varies from mildﬂu-like symptoms to life-threatening severe pneumonia.[1]Given that *** is not a part of the traditional microbiological diagnosis’human psittacosis is often underreported,misdiagnosed,and inadequately *** this study,the clinical data of *** pneumonia patients were retrospectively analyzed.

关键词： pneumonia diagnosis Chlamydia

Arithmetic Mean Calculating Circuit Used in Hardware Implementation of Adaptive Fuzzy Logic Controllers

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Arithmetic Mean Calculating Circuit Used in Hardware Impleme...

Role of iron ore in enhancing gasification of iron coke:Structural evolution,influence mechanism and kinetic analysis

第五届专用集成电路国际会议（ASICON）

作者： zhi-hao xu. Dong-Ming Jin zhi-Jian Li Institute of Microelectronics. Tsinghua University. Beijing 100084. China

＜正＞ Fuzzy Logic Systems are a kind of nonlinear systems. Because of their self-learning capabilities, researchers have studied the theory of how to synthesis the rule bases of the fuzzy logic controllers for many years, in order to design the Adaptive Fuzzy Logic Controllers （AFLC）. On the other hand, many hardware implementations of traditional Fuzzy Logic controllers （FLC） have been presented by today. As the successful results have been presented in both areas, it is reasonable to begin the study of hardware implementation of adaptive fuzzy logic controllers. We have developed a kind of fuzzy logic systems" self-learning algoritlun. and begin to design an AFLC’s chip now. In this paper, we have presented a kind of analog cell to achieve some arithmetic mean computing operation. This arithmetic computing operation is needed in the learning algoritlun. The whole circuit is a kind of switched-capacitor circuit. We have achieved this cell’s circuit design and Hspice simulation, and the results are successful.

关键词： AFLC. Table-Lookup learning algoritlun Switched-capacitor circuit

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International Journal of Minerals,Metallurgy and Materials 2025年第1期32卷 58-69页

作者： Jie Wang Wei Wang xuheng Chen Junfang Bao Qiuyue hao Heng Zheng Runsheng xu School of Chemistry and Materials Science Hubei Engineering UniversityXiaogan 432000China Key Laboratory for Ferrous Metallurgy and Resources Utilization of Ministry of Education Wuhan University of Science and TechnologyWuhan 430081China Institue of Ironmaking Technology Baosteel Central Research InstituteShanghai 201999China State Key Laboratory of Advanced Metallurgy University of Science and Technology BeijingBeijing 100083China

The utilization of iron coke provides a green pathway for low-carbon *** uncover the influence mechanism of iron ore on the behavior and kinetics of iron coke gasification,the effect of iron ore on the microstructure of iron coke was ***,a comparative study of the gasification reactions between iron coke and coke was conducted through non-isothermal thermogravimetric *** findings indicate that compared to coke,iron coke exhibits an augmentation in micropores and specific surface area,and the micropores further extend and *** provides more adsorption sites for CO_(2) molecules during the gasification process,resulting in a reduction in the initial gasification temperature of iron *** the heating rate in non-isothermal gasification can enhance the reactivity of iron *** metallic iron reduced from iron ore is embedded in the carbon matrix,reducing the orderliness of the carbon structure,which is primarily responsible for the heightened reactivity of the carbon *** kinetic study indicates that the random pore model can effectively represent the gasification process of iron coke due to its rich pore ***,as the proportion of iron ore increases,the activation energy for the carbon gasification gradually decreases,from 246.2 kJ/mol for coke to 192.5 kJ/mol for iron coke 15wt%.

关键词： low-carbon ironmaking iron coke gasification structural evolution kinetic model

Laser-Induced Highly Stable Conductive Hydrogels for Robust Bioelectronics

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NANO-MICRO LETTERS 2025年第1期17卷 1-4页

作者： Li, Yibo Zhou, hao Yang, Huayong xu, Kaichen Zhejiang Univ Sch Mech Engn State Key Lab Fluid Power & Mechatron Syst Hangzhou 310058 Peoples R China

Despite the promising progress in conductive hydrogels made with pure conducting polymer, great challenges remain in the interface adhesion and robustness in long-term monitoring. To address these challenges, Prof. Seung Hwan Ko and Taek-Soo Kim's team introduced a laser-induced phase separation and adhesion method for fabricating conductive hydrogels consisting of pure poly(3,4-ethylenedioxythiophene):polystyrene sulfonate on polymer substrates. The laser-induced phase separation and adhesion treated conducting polymers can be selectively transformed into conductive hydrogels that exhibit wet conductivities of 101.4 S cm-1 with a spatial resolution down to 5 mu m. Moreover, they maintain impedance and charge-storage capacity even after 1 h of sonication. The micropatterned electrode arrays demonstrate their potential in long-term in vivo signal recordings, highlighting their promising role in the field of bioelectronics.

关键词： Laser processing Conductive hydrogels Stable interface Bio-interfacing electrodes Bioelectronic application

A low redox potential and long life organic anode material for sodium-ion batteries

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Journal of Energy Chemistry 2025年第1期100卷 557-564页

作者： zhi Li Yang Wei Kang Zhou Xin Huang Xing Zhou Jie xu Taoyi Kong Junwei Lucas Bao Xiaoli Dong Yonggang Wang Department of Chemistry and Shanghai Key Laboratory of Molecular Catalysis and Innovative Materials Institute of New Energy Collaborative Innovation Center of Chemistry for Energy Materials (iChEM) Fudan University Department of Chemistry Boston College School of Materials Science and Engineering Anhui University of Technology

Sodium-ion batteries （SIBs） with organic electrodes are an emerging research direction due to the sustainability of organic materials based on elements like C,H,O,and sodium ***,organic electrode materials for SIBs are mainly used as cathodes because of their relatively high redox potentials（>1 V）.Organic electrodes with low redox potential that can be used as anode are ***,a novel organic anode material （tetrasodium 1,4,5,8-naphthalenetetracarboxylate,Na4TDC） has been developed with low redox potential （<0.7 V） and excellent cyclic *** three-sodium storage mechanism was demonstrated with various in-situ/ex-situ spectroscopy and theoretical calculations,showing a high capacity of 208 mAh/g and an average decay rate of merely 0.022%per ***,the Na4TDC-hard carbon composite can further acquire improved capacity and cycling stability for 1200 cycles even with a high mass loading of up to 20 mg *** pairing with a thick Na3V2（PO4）3cathode (20.6 mg cm-2),the as-fabricated full cell exhibited high operating voltage （2.8 V）,excellent rate performance and cycling stability with a high capacity retention of 88.7% after 200 cycles,well highlighting the Na4TDC anode material for SIBs.

关键词： Organic anode material Low redox potential Composite anode Sodium-ion batteries