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Stable Compositions, Structures and Electronic Properties in K–Ga Systems Under Pressure

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Chinese Physics Letters 2020年第2期37卷 39-42页

作者： Chao Wang yun-xian liu Xin Chen Pin Lv Hai-Rui Sun Xiao-Bing liu Laboratory of High Pressure Physics and Material Science School of Physics and Physical EngineeringQufu Normal UniversityQufu 273165

New stable stoichiometries in K-Ga systems are firstly investigated up to 100 GPa by the unbiased structure searching *** novel compositions as K4Ga,K3Ga,K2Ga,KGa,KGa2 and KGa4 are found to be thermodynamically stable under *** of the predicted stable phases exhibit metallic character,while the Fd3m KGa phase behaves as a semiconductor with a bandgap ~1.62 ***,the gallium atoms exhibit different interesting morphologies;e.g.,Ga2 units,zigzag chains,six rings and *** further investigate the bonding nature of K-Ga systems with help of electron localization function and Bader charge *** covalent bonding characteristics are found between the Ga and Ga atoms,and ionic bonding patterns are observed between the K and Ga ***,we notice charge transferring from the K atom to the Ga atom in the K-Ga *** present results can be helpful for understanding the diverse structures and properties of K-Ga binary compounds at high pressures.

关键词： bonding charge chains

A 27 GHz,simple 2-bit 1×8 phased array

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Journal of Electronic Science and Technology 2024年第3期22卷 26-34页

作者： Jun-xian liu yun-Ying Man Hao Yang Peng Yang School of Electronic Science and Engineering University of Electronic Science and Technology of ChinaChengdu611731China

This study demonstrates a simple 2-bit phased array operating at 27 GHz that supports one-dimensional beam scanning with left-handed circular polarization(LHCP).The antenna is constructed using a compact four-layer printed circuit board(PCB)structure,consisting of a 90°phase shifter layer with microstrip structures,a ground(GND)layer,a direct current(DC)control layer,and a circularly polarized annular radiation patch layer with 1-bit phase *** on the proposed unit structure,a 1×8 array with half-wavelength inter-element spacing was designed and *** results show that the array achieves a peak gain of 10.23 dBi and is capable of beam scanning within±50°.

关键词： 27 GHz 2-bit P-i-n diodes Phased array Reconfigurable antennas

Interfacial active sites on Co-Co_(2)C@carbon heterostructure for enhanced catalytic hydrogen generation

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Rare Metals 2023年第6期42卷 1935-1945页

作者： Huan-Huan Zhang Yang-Bin Ren Zhen-Luo Yuan Nai-Xin Kang Sehrish Mehdi Cong-Cong Xing xian-yun liu Yan-Ping Fan Bao-Jun Li Bao-Zhong liu College of Chemistry and Chemical Engineering Henan Polytechnic UniversityJiaozuo454003China ISM UMR CNRS No 5255Univ.BordeauxTalence Cedex33405France Department of Chemistry The Women University MultanKutchery CampusMultan66000Pakistan Department of Materials Science and Engineering Pennsylvania State UniversityUniversity ParkPA16802USA Research Center of Green Catalysis College of ChemistryZhengzhou UniversityZhengzhou450001China Henan Key Laboratory of Coal Green Conversion Henan Polytechnic UniversityJiaozuo454003China

Designing catalysts with capable dual-active sites to drive catalytic hydrogen generation is necessary for the future hydrogen ***,the interfacial active sites consisting of Co and Co-C on Co-Co_(2)C@carbon heterostructure are designed through annealing and highpressure *** operating temperature during the high-pressure carbonization under a CO-reducing environment is responsible for the construction and regulation of Co-Co_(2)C@C *** optimal catalyst has a high turnover frequency(TOF) of33.1 min^(-1) and low activation energy(E_a) of27.3 kJ-mol^(-1) during the hydrolysis of NH_(3)BH_(3).The catalytic stability of Co-Co_(2)C@C has no dramatic deterioration even after 5 cyclic *** interfacial active sites and the carbon on the catalyst surface enhance hydrogen generation kinetics and catalytic *** construction of interfacial active sites in Co-Co_(2)C@C prompts the dissociation of reactants(NH_(3)BH_(3) and H_(2)O molecules),leading to an enhanced catalytic hydrogen generation from NH_(3)BH_(3) hydrolysis(Co activates NH_(3)BH_(3) and Co-C activates H_(2)O).The construction of hetero-structural catalysts provides theoretical direction for the rational design of advanced transition metal carbide materials in the field of energy catalysis and conversion.

关键词： Interfacial active sites Bimolecular activation Heterostructure Hydrogen generation Catalytic mechanism

Macrophage polarization disorder in the endometrial immune microenvironment may contribute to recurrent implantation failure

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REPRODUCTIVE AND DEVELOPMENTAL MEDICINE 2024年第3期8卷 162-168页

作者： liu, yun Tan, xian-Ming He, Tian-Tian Sun Yat sen Univ Affiliated Hosp 7 Dept Obstet & Gynecol Shenzhen 518000 Peoples R China Sun Yat sen Univ Sch Med Shenzhen Campus Shenzhen 518000 Peoples R China Sun Yat sen Univ Affiliated Hosp 3 Dept Obstet Guangzhou 510000 Peoples R China

Objective:To investigate the role and mechanisms by which macrophages (M Phi) contribute to the immune environment of the endometrium in cases of recurrent implantation failure (RIF).Methods:Endometrial transcriptome data from women with and without RIF (control group) were collected. The CIBERSORT software was used to determine the abundance of immune cells within the endometrial tissue based on expression profiles. Weighted gene co-expression network analysis was used to identify crucial regulatory genes and ***:Application of CIBERSORT confirmed significant infiltration of macrophages in the RIF group. SOX6, TTC21A, KLHL31, NFIA, TNNT1, TPM1, CPVL, FUS, PEX5, and SLC43A3 were all closely correlated with M2 and M0 macrophages. Metascape and DisNor analyses revealed that these genes contribute to the regulation of macrophage polarization via the Wnt signaling ***:This study identified dysregulation of macrophage polarization within the immune microenvironment of the endometrium in patients with RIF. A comprehensive analysis was conducted to investigate the potential mechanisms underlying this disorder. Dysregulation of macrophage polarization in the endometrium of patients with RIF is strongly associated with the Wnt signaling pathway.

关键词： Macrophage Polarization disorder Immune microenvironment Recurrent implantation failure Assisted reproductive technology EXPRESSION ACTIVATION

Quasi-shadowing for Z^(d)-actions

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Acta Mathematica Sinica,English Series 2024年第6期40卷 1563-1580页

作者： Juan PAN xian Kun REN yun Hua ZHOU School of Mathematics and Statistics Chongqing Technology and Business UniversityChongqing 400067P.R.China College of Mathematics and Statistics Chongqing UniversityChongqing 401331P.R.China

A diffeomorphism is non-uniformly partially hyperbolic if it preserves an ergodic measure with at least one zero Lyapunov *** prove that a C^(1)-smooth Z^(d)-action has the quasishadowing property if one of the genera... 详细信息

关键词： Quasi-shadowing Z^(d)-action non-uniformly partially hyperbolic ergodic measure

Recent developments in biomedicine fields for laser induced breakdown spectroscopy

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Journal of Biomedical Science and Engineering 2008年第3期1卷 147-151页

作者： xian-yun liu Wei-Jun Zhang Laboratory of Environmental Spectroscopy Anhui Institute of Optics and Fine Mechanics Chinese Academy of Sciences

Laser induced breakdown spectroscopy (LIBS) can be used to determine solid, liquid, colloi-dal, and biological samples. It is a promising technique for analysis and characterization of the composition of a broad variety of objects. This review describes in brief the basic prin-ciples and technological aspects of LIBS, and the most recent progress of the various ap-plications of this technique in biomedicine fields will be reviewed in detail, including bio-aerosols detection and identification, tis-sue analysis, mineral analysis in human body, and detection of zinc in human skin. Finally new approaches and the prospects in bio-medicine fields of LIBS technique are de-scribed.

关键词： Biomedicine LIBS Elemental analysis Atomic emission spectroscopy.

Hyperspectral image super resolution using deep internal and self-supervised learning

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CAAI Transactions on Intelligence Technology 2024年第1期9卷 128-141页

作者： Zhe liu xian-Hua Han Graduate School of Science and Technology for Innovation Yamaguchi UniversityYamaguchiJapan Graduate School of Artificial Intelligence and Science Rikkyo UniversityTokyoJapan

By automatically learning the priors embedded in images with powerful modelling ca-pabilities,deep learning-based algorithms have recently made considerable progress in reconstructing the high-resolution hyperspectral(HR-HS)*** previously collected large-amount of external data,these methods are intuitively realised under the full supervision of the ground-truth ***,the database construction in merging the low-resolution(LR)HS(LR-HS)and HR multispectral(MS)or RGB image research paradigm,commonly named as HSI SR,requires collecting corresponding training triplets:HR-MS(RGB),LR-HS and HR-HS image simultaneously,and often faces dif-ficulties in *** learned models with the training datasets collected simultaneously under controlled conditions may significantly degrade the HSI super-resolved perfor-mance to the real images captured under diverse *** handle the above-mentioned limitations,the authors propose to leverage the deep internal and self-supervised learning to solve the HSI SR *** authors advocate that it is possible to train a specific CNN model at test time,called as deep internal learning(DIL),by on-line preparing the training triplet samples from the observed LR-HS/HR-MS(or RGB)images and the down-sampled LR-HS ***,the number of the training triplets extracted solely from the transformed data of the observation itself is extremely few particularly for the HSI SR tasks with large spatial upscale factors,which would result in limited reconstruction *** solve this problem,the authors further exploit deep self-supervised learning(DSL)by considering the observations as the unlabelled training ***,the degradation modules inside the network were elaborated to realise the spatial and spectral down-sampling procedures for transforming the generated HR-HS estimation to the high-resolution RGB/LR-HS approximation,and then the reconstruction errors of the observations were formulated for mea

关键词： computer vision deep learning deep neural networks hyperspectral image enhancement

Evaluation of transmission risk of respiratory particles under different ventilation strategies in an elevator

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Building Simulation 2024年第5期17卷 771-784页

作者： Liangyu Zhu xian Li Bujin Feng Fan liu School of Civil Engineering and Architecture Linyi UniversityLinyi276000China College of Agriculture Shandong Agricultural UniversityTaian271018China School of Environment and Architecture University of Shanghai for Science and TechnologyShanghai200093China

People in elevators are at risk of respiratory infection because the elevator cabin is crowded and has poor *** exhaled particles may be inhaled by the susceptible person,deposited on the surface and suspended in the elevator,which can result in direct and indirect ***,whether the air vent designs adopted in the elevator can effectively reduce the transmission risk of respiratory particles remains *** this study,the dispersion of particles under four common ventilation strategies used in the commercial elevator was investigated by proven computational fluid dynamics(CFD)*** flow field was simulated with the RNG κ-ξ turbulence model and the Lagrangian method was adopted to track particle *** effects of air vent layout and airflow rate on particle transmission were *** found that more than 50% of exhaled particles(average value)were suspended in the cabin and difficult to discharge under the investigated ventilation *** deposited fraction of particles on the susceptible person reached up to 39.14% for infiltration ventilation,which led to a high risk of contact *** the ventilation rate could not significantly reduce the inhalation proportion of particles due to the poor airflow distribution inside the elevator.A more proper ventilation strategy should be explored for the elevator to control transmission risk.

关键词： particle dispersion transmission risk elevator ventilation strategy computational fluid dynamics(CFD)

Multidisciplinary comprehensive treatment of massive hepatocellular carcinoma with hemorrhage:A case report and review of literature

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World Journal of Gastrointestinal Oncology 2024年第5期16卷 2225-2232页

作者： xian-Shuai Kou Fan-Fan Li yun Meng Jian-Ming Zhao Sheng-Fen liu Lan Zhang The First Clinical Medical College Gansu University of Chinese MedicineLanzhou 730000Gansu ProvinceChina Department of Thoracic Surgery The First Hospital of Lanzhou UniversityLanzhou 730000Gansu ProvinceChina Department of Surgery Gansu Provincial HospitalLanzhou 730000Gansu ProvinceChina Department of Orthopedics Gansu Provincial HospitalLanzhou 730000Gansu ProvinceChina

BACKGROUND Hepatocellular carcinoma(HCC),a major contributor to cancer-related deaths,is particularly prevalent in Asia,largely due to hepatitis B virus *** prognosis is generally *** case report contributes to the medical literature by detailing a unique approach in treating a large HCC through multidisciplinary collaboration,particularly in patients with massive HCC complicated by ruptured bleeding,a scenario not extensively documented *** SUMMARY The patient presented with large HCC complicated by intratumoral *** involved a multidisciplinary approach,providing individualized *** strategy included drug-eluting bead transarterial chemoembolization,sorafenib-targeted therapy,laparoscopic partial hepatectomy,and standardized sintilimab monoclonal antibody *** months after treatment,the patient achieved complete radiological remission,with significant symptom *** studies showed no lesions or recurrence,and clinical assessments confirmed complete *** report is notable as possibly the first docu-mented case of successfully treating such complex HCC conditions through integrated multidisciplinary efforts,offering new insights and a reference for future similar *** This study demonstrated effective multidisciplinary treatment for massive HCC with intratumoral bleeding,providing insights for future similar cases.

关键词： Hepatocellular carcinoma Transarterial chemoembolization Sintilimab Sorafenib Translational therapy Multidisciplinary team Case report