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Journal of Iron and Steel Research International 2024年第1期31卷 215-223页

作者： Cheng Lu Wan-lin Wang Chen-yang Zhu jie Zeng Xin-yuan Liu Hua-long Li School of Metallurgy and Environment Central South UniversityChangsha410083HunanChina National Center for International Research of Clean Metallurgy Central South UniversityChangsha410083HunanChina Institute of Research of Iron and Steel ShasteelZhangjiagang215625JiangsuChina

Typical Q235 low-carbon steel samples with different hydrogen contents(0.0004,0.0008,and 0.0013 wt.%)were prepared by adjusting the environment humidity and *** effects of hydrogen on interfacial heat transfer,contact behavior,and microstructure evolution were investigated using a novel droplet solidification *** results revealed that when the hydrogen content increases from 0.0004 to 0.0013 wt.%,the maximum heat flux between the molten steel and cooling substrate decreases from 8.01 to 6.19 MW/m^(2),and the total heat removed in the initial 2 s reduces from 10.30 to 8.27 MJ/m^(2).Moreover,the final contact angle between the molten steel and substrate increases from 103.741°to 113.697°,and the number of pores on the droplet bottom surface increases significantly from 21 to 210 with the increase in *** surface roughness of the droplet bottom surface increases from 20.902 to 49.181 *** addition,the average grain size of the droplet increases from 14.778 to 33.548 pm with the increase in the hydrogen *** interfacial contact condition becomes worse due to the escape of hydrogen from the steel matrix during the cooling process,which leads to the reduction in the interfacial heat transfer and the increase in the grain size.

关键词： Strip casting Hydrogen content Interfacial heat transfer behavior Contact behavior Microstructure evolution

Transmission Energy Allocation for Over-the-Air Computation with Energy Harvesting

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Journal of Communications and Information Networks 2024年第2期9卷 126-136页

作者： Siyao Zhang Zixiang Ren Xinmin Li Yin long jie Xu Shuguang Cui School of Computer Science and Technology Southwest University of Science and TechnologyMianyang 621010China Shenzhen Future Network of Intelligence Institute(FNii-Shenzhen) The Chinese University of Hong KongShenzhenGuangdong 518172China School of Information Science and Technology University of Science and Technology of ChinaHefei 230027China FNii-Shenzhen The Chinese University of Hong KongShenzhenGuangdong 518172China College of Computer Science Chengdu UniversityChengdu 610100China School of Science and Engineering FNii-Shenzhenand Guangdong Provincial Key Laboratory of Future Networks of IntelligenceThe Chinese University of Hong KongShenzhenGuangdong 518172China

Over-the-air computation(AirComp)has recently emerged as a promising multiple-access technique for fast wireless data aggregation(WDA)from distributed wireless devices(WDs). This paper investigates an energy harvesting (EH) AirComp system, in which multiple EH-powered single-antenna WDs simultaneously send wireless signals to a single-antenna access point (AP) with conventional energy supply for WDA via AirComp. Under this setup, we minimize the average computation mean square error(MSE)over a particular time period, by jointly optimizing the transmit energy allocation at the WDs and the AirComp denoising factors at the AP over time, subject to the energy causality constraints at individual WDs. First, we consider the offline scenario by assuming that the energy state information(ESI)and channel state information (CSI) are non-causally known at the beginning of the period, in which the formulated average MSE minimization corresponds to a non-convex optimization problem. We present a high-quality converged solution by using the techniques of alternating optimization and convex optimization. It is shown that for each WD,if the EH rate is sufficiently high,then the channel inversion power allocation is adopted;while if the EH rate is low, then all the harvested energy should be used up for transmission with proper energy allocation over time. Next, we consider the online scenario with causal ESI and CSI,in which the MSE minimization becomes a stochastic optimization *** this scenario, we present an offline-inspired online algorithm to obtain efficient online energy allocation designs by utilizing the obtained offline solutions. Finally,numerical results show that the proposed designs significantly outperform two benchmark schemes with power-halving and full-power transmission,respectively.

关键词： over-the-air computation(AirComp) power allocation energy harvesting(EH) optimization

Intermittent appearance of right coronary fistula and collateral circulation:A case report

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World Journal of Clinical Cases 2021年第28期9卷 8504-8508页

作者： Wen-jie long Xi Huang Yuan-Hong Lu Hao-Ming Huang Guo-Wei Li Xia Wang Zhi-Ling He Department of Geriatrics The First Affiliated Hospital of Guangzhou University of Chinese MedicineGuangzhou 510006Guangdong ProvinceChina The First Clinical Medical College Guangzhou University of Chinese MedicineGuangzhou 510006Guangdong ProvinceChina Department of Radiology The First Affiliated Hospital of Guangzhou University of Chinese MedicineGuangzhou 510006Guangdong ProvinceChina Department of Emergency Guangdong Provincial Hospital of Chinese MedicineGuangzhou 510000Guangdong ProvinceChina Department of Cardiovascular Guangdong Provincial Hospital of Chinese MedicineGuangzhou 510000Guangdong ProvinceChina Department of Cardiovascular Guangdong Provincial Hospital of Chinese MedicineGuangzhou 510006Guangdong ProvinceChina

BACKGROUND Congenital coronary artery fistula can lead to symptoms of chest tightness,chest pain,or exertional dyspnea,which is a congenital vascular malformation that should not be *** who have such malformations are frequently observed with different concurrent abnormal anatomic *** circulation may have a positive effect on improving the patients'*** SUMMARY A 53-year-old female experienced episodic chest discomfort for the past month with symptoms manifesting when she was agitated or *** a positive treadmill test,the patient underwent coronary angiography.“Ghostlike”intermittent appearance of coronary ventricular fistula and collateral branching were *** patient was diagnosed with a right coronary ventricular fistula and collateral *** This case shows the likelihood of collateral circulation in patients with coronary artery *** may provide medical staff with novel solutions to treat insufficiency of myocardial blood supply induced by cardiovascular malformations.

关键词： Coronary fistula Collateral circulation Congenital coronary artery Case report

STAT5 promotes PD-L1 expression by facilitating histone lactylation to drive immunosuppression in acute myeloid leukemia

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Signal Transduction and Targeted Therapy 2023年第10期8卷 5106-5118页

作者： Ze-Wei Huang Xue-Ning Zhang Ling Zhang Ling-Ling Liu Jing-Wen Zhang Yu-Xiang Sun Jue-Qiong Xu Quentin Liu Zi-jie long Department of Hematology The Third Affiliated HospitalSun Yat-sen UniversityInstitute of HematologySun Yat-sen UniversityGuangzhouChina Department of Nephrology The Third Affiliated Hospitalun Yat-sen UniversityGuangzhouChina Sun Yat-sen University Cancer Center State Key Laboratory of Oncology in South ChinaSun Yat-sen UniversityGuangzhouChina

Immunotherapy is a revolutionized therapeutic strategy for tumor treatment attributing to the rapid development of genomics and immunology,and immune checkpoint inhibitors have successfully achieved responses in numbers of tumor types,including hematopoietic ***,acute myeloid leukemia(AML)is a heterogeneous disease and there is stll a lack of systematic demonstration to apply immunotherapy in AML based on PD-1/PD-L1 blockage.

关键词： myeloid acute leukemia

Liver-resident NK cells suppress autoimmune cholangitis and limit the proliferation of CD4^(+) T cells

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Cellular & Molecular Immunology 2020年第2期17卷 178-189页

作者： Zhi-Bin Zhao Fang-Ting Lu Hong-Di Ma Yin-Hu Wang Wei Yang jie long Qi Miao Weici Zhang Zhigang Tian William M.Ridgway jie Cao M.Eric Gershwin Zhe-Xiong Lian Department of General Surgery Guangzhou Digestive Disease CenterGuangzhou First People’s HospitalSchool of MedicineSouth China University of TechnologyGuangzhouGuangdong 510180China Chronic Disease Laboratory Institutes for Life Sciences and School of MedicineSouth China University of TechnologyGuangzhou 510006China Institute of Immunology and School of Life Sciences University of Science and Technology of ChinaHefeiAnhui 230027China Center for Reproductive Medicine Anhui Provincial Hospital Affiliated to Anhui Medical UniversityHefeiAnhuiChina Department of Gastroenterology and Hepatology Renji HospitalSchool of MedicineShanghai Jiao Tong UniversityShanghaiChina Division of Rheumatology Allergy and Clinical ImmunologyUniversity of California at Davis School of MedicineDavisCAUSA Division of Immunology Allergy and RheumatologyUniversity of CincinnatiCincinnatiOH 45267USA

Liver-resident NK cells are distinct from conventional NK cells and play an important role in the maintenance of liver *** liver-resident NK cells participate in autoimmune cholangitis remains ***,we extensively investigated the impact of NK cells in the pathogenesis of autoimmune cholangitis utilizing the well-established dnTGFβRII cholangitis model,NK cell-deficient(Nfil3−/−)mice,adoptive transfer and in vivo antibody-mediated NK cell *** data demonstrated that disease progression was associated with a significantly reduced frequency of hepatic NK *** of NK cells resulted in exacerbated autoimmune cholangitis in dnTGFβRII *** further confirmed that the DX5−CD11c^(hi) liver-resident NK cell subset colocalized with CD4^(+) T cells and inhibited CD4^(+) T cell *** expression microarray analysis demonstrated that liver-resident NK cells had a distinct gene expression pattern consisting of the increased expression of genes involved in negative regulatory functions in the context of the inflammatory microenvironment.

关键词： Liver-resident NK Cholangitis CD4^(+)T cell Suppression

Polypyride intercalation boosting the kinetics and stability of V3O7·H2O cathodes for aqueous zinc-ion batteries

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Journal of Energy Chemistry 2024年第10期97卷 361-370页

作者： Qingqing He jie Bai Mengda Xue Yanxin Liao Huayu Wang Mujun long Lingyun Chen Department of Applied Chemistry School of Chemistry and Chemical Engineering Chongqing University Laboratory of Materials and Metallurgy College of Materials Science and Engineering Chongqing University

V3O7·H2O（VO） is a high capacity cathode material in the field of aqueous zinc ion batteries（AZIBs）,but it is limited by slow ion migration and low electrical *** this paper,polypyridine（PPyd） intercalated VO with nanoribbon structure was prepared by a simple in-situ pre-intercalation,which is noted *** total density of states（TDOS） shows that after the pre-intercalation of PPyd,an intermediate energy level appears between the valence band and conduction band,which provides a step that can effectively reduce the band gap and enhance the electron ***,the density functional theory（DFT） results found that Zn2+is more easily de-intercalated from the V-O skeleton,which proves that the embeddedness of PPyd improves the diffusion kinetics of Zn2+.Electrochemical studies have shown that VO-PPyd cathode materials exhibit excellent rate performance(high specific capacity of 465 and 192 mA h g-1at 0.2 and 10 A g-1,respectively) and long-term cycling performance（92.7%capacity retention rate after 5300 cycles）,due to their advantages in structure and *** importantly,the energy density of VO-PPyd//Zn at 581 and 5806 W kg-1is 375 and 247 W h kg-1,***-PPyd exhibits excellent electrochemical properties compared to previously reported vanadium based cathodes,which makes it highly competitive in the field of high-performance cathode materials of AZIBs.

关键词： Aqueous zinc ion batteries DFT calculation Electrical conductivity Ion migration Polypyridine V3O7·H2O

A High-Accuracy Curve Boundary Recognition Method Based on the Lattice Boltzmann Method and Immersed Moving Boundary Method

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Computer Modeling in Engineering & Sciences 2024年第9期140卷 2533-2557页

作者： jie-Di Weng Yong-Zheng Jiang long-Chao Chen Xu Zhang Guan-Yong Zhang Hunan Provincial Key Laboratory of Health Maintenance for Mechanical Equipment Hunan University of Science and TechnologyXiangtan411201China School of Mechanical Engineering Hunan Chemical Vocational Technology CollegeZhuzhou412000China

Applying numerical simulation technology to investigate fluid-solid interaction involving complex curved bound-aries is vital in aircraft design,ocean,and construction ***,current methods such as Lattice Boltzmann(LBM)and the immersion boundary method based on solid ratio(IMB)have limitations in identifying custom curved ***,IBM based on velocity correction(IBM-VC)suffers from inaccuracies and numerical ***,this study introduces a high-accuracy curve boundary recognition method(IMB-CB),which identifies boundary nodes by moving the search box,and corrects the weighting function in LBM by calculating the solid ratio of the boundary nodes,achieving accurate recognition of custom curve *** addition,curve boundary image and dot methods are utilized to verify *** findings revealed that IMB-CB can accurately identify the boundary,showing an error of less than 1.8%with 500 ***,the flow in the custom curve boundary and aerodynamic characteristics of the NACA0012 airfoil are calculated and compared to *** showed that IMB-CB yields lower lift and drag coefficient errors than IBM-VC,with a 1.45%drag coefficient *** addition,the characteristic curve of IMB-CB is very stable,whereas that of IBM-VC is *** the moving boundary problem,LBM-IMB-CB with discrete element method(DEM)is capable of accurately simulating the physical phenomena of multi-moving particle flow in complex curved *** research proposes a new curve boundary recognition method,which can significantly promote the stability and accuracy of fluid-solid interaction simulations and thus has huge applications in engineering.

关键词： Fluid-solid interaction curve boundary recognition method Lattice Boltzmann method immersed moving boundary method

Enhanced energy density and fast-charging ability via directional particle configuration

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Journal of Energy Chemistry 2024年第3期90卷 152-164,I0005页

作者： Xiongwei Wu Shanguang lv Jiabao Li Xingrong Yin Xuewen Wu Jun Liu jie Zhang Yuhan Yu Bei long Hunan Yinfeng New Energy Co.Ltd. Changsha 410019HunanChina

The limited energy density of lithium-ion capacitors poses a significant obstacle to their widespread application,primarily stemming from the inability of the electrodes to simultaneously fulfill both high energy density and rapid charging *** data demonstrate that a directional particle configuration can enhance charging speed while maintaining high-capacity density,but it is rarely ***,we have developed a particle-level electrochemical model capable of reconstructing an electrode with a directional particle *** employing this method,an investigation was conducted to explore how the spatial morphology characteristics of particle configuration impact the energy storage characteristics of *** demonstrate that rational particle configuration can effectively enhance the transport of lithium ions and create additional space for lithium-ion *** the same particle size distribution,the best electrode can increase the discharge capacity by up to132.4% and increase the charging SOC by 11.3% compared to the ordinary electrode under the condition of 6 *** findings provide a further understanding of the energy storage mechanism inside the anisotropic particle distribution electrode,which is important for developing high-performance lithium-ion capacitors.

关键词： Supercapacitor Gradient design strategies Energy storage Charge transport

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Lignin-reinforced PVDF electrolyte for dendrite-free quasi-solid-state Li metal battery

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Rare Metals 2024年第3期43卷 1006-1016页

作者： Xin-Yang Chen Xue-jie Gao Han-Yan Wu Yu-long Liu Xiao-Fei Yang Run-Cang Sun Center for Lignocellulosic Chemistry and Biomaterials College of Light Industry and Chemical EngineeringDalian Polytechnic UniversityDalian116034China Division of Energy Storage Dalian National Laboratory for Clean EnergyDalian Institute of Chemical PhysicsChinese Academy of SciencesDalian116023China School of Chemistry Northeast Normal UniversityChangchun130024China

Quasi-solid-state lithium metal batteries(QSSLMBs)assembled with polyvinylidene fluoride(PVDF)are a promising class of next-generation rechargeable batteries due to their safety,high energy density,and superior interfacial ***,PVDF has a series of inherent drawbacks such as low ionic conductivity,ease of crystallization,and hydrophobic character that leading to poor cell *** tackle these issues,a lignin-reinforced PVDF electrolyte is proposed in this work to solve these drawbacks of PVDF and enhance the comprehensive performance of *** lithophilic polar groups of lignin can promote uniform deposition of Li on the *** with the improved mechanical properties can efficiently prevent Li dendrites penetration through the *** addition,more active sites provided by lignin can also enhance Li^(+)transport and lead to a faster electrochemical reaction *** from the ingenious design,Li symmetric cells with 5%lignin-PVDF quasi-solid-state electrolyte can operate for 900 h at a high current density/capacity of 5 mA·cm^(-2)/5 mAh·cm^(-2),while shortcircuiting occurs after 56 h for the counterpart(pure PVDF).Moreover,a full cell of Li/5%lignin-PVDF/LFP cell demonstrates a high capacity of 96.2 mAh·g^(-1)after 2000 cycles at 10 *** work is expected to open up promising opportunities to develop other high-energy/power-density QSSLMBs.

关键词： Quasi-solid-state electrolyte Lignin PVDF Dendrite-free Li metal battery

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肺癌筛查的现状与发展

医学信息 2024年第13期37卷 169-173页

作者：何宗林龙皆存王家盛蓝小淅彭旭蔡凯广西中医药大学研究生院广西中医药大学第一附属医院/广西中医药大学第一临床医学院

肺癌是全球死亡率排行首位的恶性肿瘤，由于病情发展快，治疗手段有限，现阶段仅在早期才有较好的预后。许多肺癌筛查实验中已经证明，通过筛查提高早期肺癌检出率是降低所有人群肺癌死亡率的有效措施，早诊断、诊断准是关键。完善筛查... 详细信息

肺癌是全球死亡率排行首位的恶性肿瘤，由于病情发展快，治疗手段有限，现阶段仅在早期才有较好的预后。许多肺癌筛查实验中已经证明，通过筛查提高早期肺癌检出率是降低所有人群肺癌死亡率的有效措施，早诊断、诊断准是关键。完善筛查策略、合理划分界定高危人群标准是实现早诊早治需要解决的重要课题，需要进一步发掘肺癌筛查技术中影像学、生物标志物、人工智能等筛查方法在临床诊断与风险评估的潜力。本文回顾肺癌筛查历史的关键节点，综合分析肺癌筛查现状与发展的持续研究，以探讨肺癌筛查计划的可行性问题。

关键词：肺癌早期筛查高危人群筛查技术成本效益筛查计划