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Metal-organic frameworks derived transition metal phosphides for electrocatalytic water splitting

Journal of Energy Chemistry 2022年第5期31卷 494-520页

作者： li-ming cao Jia Zhang li-Wen Ding Zi-Yi Du Chun-Ting He Key Laboratory of Functional Small Molecules for Ministry of Education College of Chemistry and Chemical EngineeringJiangxi Normal UniversityNanchang 330022JiangxiChina Key Laboratory for Green Chemistry of Jiangxi Province Nanchang 330022JiangxiChina

It is critical to synthesize high-efficiency electrocatalysts to boost the performance of water splitting to meet the requirements of industrial applications. Metal-organic frameworks(MOFs) can function as ideal molecular platforms for the design of highly reactive transition metal phosphides(TMPs), a kind of candidates for high-efficiently electrocatalytic water splitting. The intrinsic activity of the electrocatalysts can be greatly improved via modulating the electronic structure of the catalytic center through the MOF precursors/templates. Moreover, the carbon layer converted in-situ by the organic ligands can not only protect the TMPs from being degraded in the harsh electrochemical environments, but also avoid agglomeration of the catalysts, thereby promoting their activities and stabilities. Furthermore,heteroatom-containing ligands can incorporate N, S or P, etc. atoms into the carbon matrixes after conversion, regulating the coordination microenvironments of the active centers as well as their electronic structures. In this review, we first summarized the latest developments in MOF-derived TMPs by the unique advantages in metal, organic ligand, and morphology regulations for electrocatalytic water splitting. Secondly, we concluded the critical scientific issues currently facing for designing state-of-the-art TMP-based electrocatalysts. Finally, we presented an outlook on this research area, encompassing electrocatalyst construction, catalytic mechanism research, etc.

关键词： Metal-organic framework Transition metal phosphide Water splitting Electrocatalyst Electronic structure

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The pseudospectrum and spectrum(in)stability of quantum corrected Schwarzschild black hole

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Science China(Physics,Mechanics & Astronomy) 2024年第10期67卷 55-75页

作者： li-ming cao Jia-Ning Chen liang-Bi Wu libo Xie Yu-Sen Zhou School of Fundamental Physics and Mathematical Sciences Hangzhou Institute for Advanced StudyUCASHangzhou 310024China Peng Huanwu Center for Fundamental Theory Hefei 230026China Interdisciplinary Center for Theoretical Study and Department of Modern Physics University of Science and Technology of ChinaHefei 230026China

In this study,we investigate the pseudospectrum and spectrum(in)stability of quantum corrected Schwarzschild black ***,we use the hyperboloidal framework to cast the quasinormal mode(QNM)problem into an eigenvalue problem associated with a non-selfadjoint operator,and then the spectrum and pseudospectrum are ***,the invariant subspace method is exploited to improve the computational efficiency for *** investigation into the spectrum(in)stability entails two main *** the one hand,we calculate the spectra of the quantum corrected black hole,then by the means of the migration ratio,the impact of the quantum correction effect on the Schwarzschild black hole has been *** results indicate that the so-called“migration ratio instability”will occur for small black holes with small angular momentum number *** the eikonal limit,the migration ratios remain the same for each *** the other hand,we study the spectrum(in)stability of the quantum corrected black hole by directly adding some particular perturbations into the effective potential,where perturbations are located at the event horizon and null infinity,*** are two interesting observations under the same perturbation energy ***,perturbations at infinity are more capable of generating spectrum instability than those at the event ***,we find that the peak distribution can lead to the instability of QNM spectrum more efficiently than the average distribution.

关键词： quasinormal modes pseudospectrum hyperboloidal coordinate

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Tunnelling Phenomenon near an Apparent Horizon in Two-Dimensional Dilaton Gravity

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Communications in Theoretical Physics 2017年第9期67卷 323-328页

作者： li-ming cao Xiao-Zhu Jiang Yu-Xuan Peng Interdisciplinary Center for Theoretical Study University of Science and Technology of China Hefei 230026 China CAS Key Laboratory of Theoretical Physics Institute of Theoretical Physics Chinese Academy of Sciences Beijing 100190 China

Based on the definition of the apparent horizon in a general two-dimensional dilaton gravity theory, we analyze the tunnelling phenomenon near the apparent horizon. In this theory the definition of the horizon is very different from those in higher-dimensional gravity theories. By using the Hamilton-Jacobi method, the spectrum of the radiation is obtained and the temperature of the radiation is read out from this spectrum. The temperature is proportional to the surface gravity of the apparent horizon as usual. Besides, in stationary cases we calculate the spectrum by using Parikh and Wilczek＇s null geodesic method and the result conforms to that obtained by using the Harnilton-Jacobi method. This is expected since the flamilton-Jacobi method applies to generic spacetimes, including stationary ones.

关键词： two-dimensional dilaton gravity apparent horizon tunnelling phenomenon

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World Journal of Clinical Cases 2022年第5期10卷 1580-1585页

作者： Peng-Bo Deng Juan Jiang Cheng-Ping Hu li-ming cao Min li Department of Respiratory Medicine National Key Clinical SpecialtyBranch of National Clinical Research Center for Respiratory DiseasesXiangya HospitalCentral South UniversityChangsha 410008Hunan ProvinceChina Xiangya Lung Cancer Center Xiangya HospitalCentral South UniversityChangsha 410008Hunan ProvinceChina Center of Respiratory Medicine Xiangya HospitalCentral South UniversityChangsha 410008Hunan ProvinceChina Clinical Research Center for Respiratory Diseases in Hunan Province Changsha 410008Hunan ProvinceChina National Clinical Research Center for Geriatric Disorders Xiangya HospitalCentral South UniversityChangsha 410008Hunan ProvinceChina

BACKGROUND Cytokine release syndrome(CRS)is defined as systemic inflammation that usually occurs following chimeric antigen receptor T-cell therapy administration;however,it has not been reported in patients with untreated non-small cell lung cancer to *** SUMMARY A 44-year-old nonsmoking woman presented to the hospital due to fever,palpitation,nausea,and cough for 1 mo and was diagnosed with stage cT3N3M0(IIIc)adenocarcinoma of the *** examinations revealed elevated cytokine[tumor necrosis factor-α,interleukin(IL)-1β,and IL-6]and inflammatory factor levels,which decreased after treatment with corticosteroids and immunoglobulin and when tumor growth was controlled following chemotherapy,radiotherapy,and antiangiogenesis ***,tumor recurrence was *** administration of nivolumab as third-line treatment,the patient’s condition was transiently controlled;however,CRS-like symptoms suddenly emerged,which led to a resurgence of cytokines and inflammatory factors and rapid *** CRS can develop in treatment-naïve lung cancer *** with tumorrelated CRS may be at risk of CRS recurrence,aggravation,and onset of immune checkpoint inhibitor-related adverse events.

关键词： Cytokine release syndrome Non-small cell lung cancer Immune checkpoint inhibitors Nivolumab Tumor necrosis factorα Interleukin-1β Interleukin-6 Case report

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Statistical performance of IF estimation of LFM signals with timevarying amplitude using the peak of WVD

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Journal of Systems Engineering and Electronics 2005年第4期16卷 787-791页

作者： Chen Guanghua Ma Shiwei Qin Tinghao Wang Jian li ming cao Jialin Microelectronic Research & Development Center Shanghai Univ. Shanghai 200072 P. R. China

The instantaneous frequency （IF） estimation of the linear frequency modulated （LFM） signals with time-varying amplitude using the peak of the Wigner-Ville distribution （WVD） is studied. Theoretical analysis shows that the estimation on LFM signals with time-varying amplitude is unbiased, only if WVD of time-varying amplitude reaches its maximum at frequency zero no matter in which time. The statistical performance in the case of additive white Guassian noise is evaluated and an analytical expression for the variance is provided. The simulations using LFM signals with Gaussian envelope testify that IF can be estimated accurately using the peak of WVD for four models of amplitude variation. Furthermore the statistical result of estimation on the signals with amplitude descending before rising is better than that of the signals with constant amplitude when the amplitude variation rate is moderate.

关键词： instantaneous frequency linear frequency modulated signals Wigner-Ville distribution statistical performance variance.

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Endoscopic clipping for the secondary prophylaxis of bleeding gastric varices in a patient with cirrhosis:A case report

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World Journal of Clinical Cases 2022年第4期10卷 1447-1453页

作者： Guang-Chao Yang Ya-Xian Mo Wei-Hua Zhang li-Bin Zhou Xu-ming Huang li-ming cao Department of Gastroenterology Shenzhen Shiyan People's HospitalShenzhen 518000Guangdong ProvinceChina Department of Internal Medicine Shenzhen University The First Affiliated HospitalShenzhen 518000Guangdong ProvinceChina

BACKGROUND Bleeding from gastroesophageal varices(GOV)is a serious complication in patients with liver cirrhosis,carrying a very high mortality *** secondary prophylaxis against initial and recurrent bleeding,endoscopic therapy is a critical *** variceal clipping for secondary prophylaxis in adult GOV has not been *** SUMMARY A 66-year-old man with cirrhosis was admitted to our hospital complaining of asthenia and hematochezia for 1 *** hemoglobin level and red blood cell counts were significantly decreased,and his fecal occult blood test was *** enhanced computed tomography of the abdomen showed *** patient was diagnosed with hepatitis B cirrhosis-related GOV bleeding.A series of palliative treatments were administered,resulting in significant clinical ***,an endoscopic examination revealed severe gastric fundal varices,prompting endoscopic variceal *** were no further episodes of gastrointestinal *** GOV improved significantly on follow-up imaging and was confirmed as improved on endoscopy at the 5th post-operative *** Our results suggest that endoscopic clipping is an inexpensive,safe,easy,effective,and tolerable method for the secondary prophylaxis of bleeding from gastric type 2 ***,additional research is indicated to confirm its longterm safety and efficacy.

关键词： Endoscopy Metal clips Gastric varices Endoscopic variceal clipping Secondary prophylaxis Case report

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Characterization of Organic Aerosol at a Rural Site in the North China Plain Region:Sources,Volatility and Organonitrates

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Advances in Atmospheric Sciences 2021年第7期38卷 1115-1127页

作者： Qiao ZHU li-ming cao Meng-Xue TANG Xiao-Feng HUANG Eri SAIKAWA ling-Yan HE Key Laboratory for Urban Habitat Environmental Science and Technology Peking University Shenzhen Graduate SchoolShenzhen 518055China Department of Environmental Sciences Emory UniversityAtlantaGA 30322USA Rollins School of Public Health Emory UniversityAtlantaGA 30322USA

The North China Plain(NCP)is a region that experiences serious aerosol pollution.A number of studies have focused on aerosol pollution in urban areas in the NCP region;however,research on characterizing aerosols in rural NCP areas is comparatively *** this study,we deployed a TD-HR-AMS(thermodenuder high-resolution aerosol mass spectrometer)system at a rural site in the NCP region in summer 2013 to characterize the chemical compositions and volatility of submicron aerosols(PM_(1)).The average PM_(1)mass concentration was 51.2±48.0μg m^(−3) and organic aerosol(OA)contributed most(35.4%)to PM_(1).Positive matrix factorization(PMF)analysis of OA measurements identified four OA factors,including hydrocarbon-like OA(HOA,accounting for 18.4%),biomass burning OA(BBOA,29.4%),lessoxidized oxygenated OA(LO-OOA,30.8%)and more-oxidized oxygenated OA(MO-OOA,21.4%).The volatility sequence of the OA factors was HOA>BBOA>LO-OOA>MO-OOA,consistent with their oxygen-to-carbon(O:C)***,the mean concentration of organonitrates(ON)was 1.48−3.39μg m−3,contributing 8.1%-19%of OA based on cross validation of two estimation methods with the high-resolution time-of-flight aerosol mass spectrometer(HRToF-AMS)*** analysis shows that ON were more correlated with BBOA and black carbon emitted from biomass burning but poorly correlated with ***,volatility analysis for ON further confirmed that particulate ON formation might be closely associated with primary emissions in rural NCP areas.

关键词： organic aerosols volatility organonitrates biomass burning North China Plain

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Image-based visualization of stents in mechanical thrombectomy for acute ischemic stroke:Preliminary findings from a series of cases

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World Journal of Clinical Cases 2023年第21期11卷 5047-5055页

作者： Qing-Yang Yao Mao-lin Fu Qing Zhao Xiao-ming Zheng Kai Tang li-ming cao Department of Neurology The First Hospital of Quanzhou Affiliated to Fujian Medical UniversityQuanzhou 362000Fujian ProvinceChina Department of Neurology The 910th Hospital of the Joint Logistics Support Force of the Chinese PLAQuanzhou 362000Fujian ProvinceChina Department of Neurology The First Affiliated Hospital of Shenzhen UniversityShenzhen 518000Guangdong ProvinceChina Hunan Provincial Key Laboratory of The Research and Development of Novel Pharmaceutical Preparations Changsha Medical UniversityChangsha 410219Hunan ProvinceChina

BACKGROUND Mechanical thrombectomy is the most effective treatment for great cerebral artery embolization within a set time ***,an arteriogram does not show the localization of the stent after release and whether a thrombus is captured or ***,improving the visualization of a stent in interventional therapy will be helpful for *** To analyze stent imaging findings to enhance clinicians’understanding of a special circumstance,wherein a Solitaire AB retrievable stent was visible during the imaging of a thrombus capture that improved the success rate of stent-based mechanical *** This was a retrospective study with four acute ischemic stroke(AIS)patients who underwent stent-based mechanical *** Patient 1 was a 64-year-old man admitted after 5 h of confusion;angiography revealed basilar artery *** inserted a stent into the left posterior cerebral artery-P2 segment and visualized the expanded stent that successfully captured a *** 2 was a 74-year-old man admitted with confusion,which lasted approximately 3 *** revealed a left middle cerebral artery(MCA)-M1 segment occlusion.A stent was deployed in the distal M2 segment,and we could visualize the stent by capturing the *** 3 was a 74-year-old woman admitted after experiencing left hemiplegia for 3 *** deployed a stent at the distal right MCAM2 segment,and the developing stent captured a large *** 4 was an 82-year-old man who presented with confusion for 3 h.A developing stent was placed in the distal left MCA-M1 segment,which captured a large thrombus and several fragmented *** To the best of our knowledge,this is the first report of stent imaging in patients with *** demonstrated the usefulness and substantial potential of stent imaging in stent-based mechanical thrombectomy for AIS.

关键词： Digital subtraction angiography Solitaire AB stent Acute ischemic stroke Stent-based mechanical thrombectomy Visualization of stents

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X-linked Charcot-Marie-Tooth disease after SARS-CoV-2 vaccination mimicked stroke-like episodes: A case report

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World Journal of Clinical Cases 2023年第2期11卷 464-471页

作者： Qiang Zhang Yang Wang Run-Tao Bai Bao-Rong lian Yu Zhang li-ming cao Department of Neurology The First Affiliated Hospital of Shenzhen UniversityShenzhen 518000Guangdong ProvinceChina Shantou University Medical College Shantou UniversityShantou 515063Guangdong ProvinceChina Clinical College of The Shenzhen Second People's Hospital Anhui Medical UniversityShenzhen 518000Guangdong ProvinceChina Hunan Key Laboratory of The Research and Development of Novel Pharmaceutical Preparations Changsha Medical UniversityChangsha 410219Hunan ProvinceChina

BACKGROUND Severe acute respiratory syndrome coronavirus 2(SARS-CoV-2) vaccinations have been administered worldwide, with occasional reports of associated neurological complications. Specifically, the impact of vaccinations on individuals with Xlinked Charcot-Marie-Tooth disease type 1(CMTX1) is unclear. Patients with CMTX1 can have stroke-like episodes with posterior reversible encephalopathy syndrome on magnetic resonance imaging(MRI), although this is *** SUMMARY A 39-year-old man was admitted with episodic aphasia and dysphagia for 2 d. He received SARS-CoV-2 vaccination 39 d before admission. Physical examination showed pes cavus and reduced tendon reflexes. Brain MRI showed bilateral, symmetrical, restricted diffusion with T2 hyperintensities in the cerebral hemispheres. Nerve conduction studies revealed peripheral nerve damage. He was diagnosed with Charcot-Marie-Tooth disease, and a hemizygous mutation in the GJB1 gene on the X chromosome, known to be pathogenic for CMTX1, was identified. Initially, we suspected transient ischemic attack or demyelinating leukoencephalopathy. We initiated treatment with antithrombotic therapy and immunotherapy. At 1.5 mo after discharge, brain MRI showed complete resolution of lesions, with no *** SARS-CoV-2 vaccination could be a predisposing factor for CMTX1 and trigger a sudden presentation.

关键词： X-linked Charcot-Marie-Tooth disease SARS-CoV-2 vaccination Stroke-like episodes Reversible splenial lesion syndrome Demyelinating leukoencephalopathy Case report

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Study of Spectral Character of Alkali Metals Using Microwave Plasma Torch Simultaneous Spectrometer

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Chemical Research in Chinese Universities 2006年第6期22卷 703-707页

作者： FENG Guo-dong WAN Yi HUAN Yan-fu JIANG jie li ming cao Yan-bo YU Ai-min JIN Qin-han Institute of Miniature Analytical Instrumentation College of Chemistry Jilin University Jilin Province Research Center for Engineering and Technology of Spectral Instruments Changchun 130023 P. R. China

A microwave plasma torch （MPT） simultaneous spectrometer was used to study the spectral character and the matrix effect on alkali metal ions in solution. The main parameters were optimized. The microwave forward power was 100 W. The argon flow rate that was used to sustain the Ar-MPT included the flow rate of carrier gas and the flow rate of support gas, which were 0. 8 and 1.0 L/min, respectively. The HC1 concentration in the solution was 0.02 mol/L. The observation height was 9. 0 ram. The detection limits of li, Na, K, Rb, and Cs were 0. 0003, 0. 0004, 0. 009, 0.07 and 2.4 mg/L, respectively, and the resuhs obtained by the Ar-MPT were compared with those obtained by argon inductively coupled plasma（Ar-ICP） and argon microwave induced plasma（Ar-MIP）. The interference effects of several matrix elements were also studied.

关键词： Alkali metals Microwave plasma torch Simultaneous spectrometer Matrix effects

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