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Congenital coronary artery fistulas： dual-source CT findings from consecutive 6624 patients with suspected or confirmed coronary artery disease

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Chinese Medical Journal 2011年第24期124卷 4172-4177页

作者： YUN Hong ZENG Meng-su YANG Shan jin hang YANG xue Department of Radiology Zhongshan Hospital Fudan Universityand Shanghai Medical Imaging Institute Shanghai 200032 China

Background Coronary artery fistulas （CAFs） are rare congenital abnormality often unintentionally found in patients with coronary artery disease. Clinical diagnosis of CAFs is difficult due to symptomless or lack of specific symptoms. Dual-source computed tomography （DSCT） might be a useful diagnostic tool for CAFs. The study aimed to retrospectively summarize the imaging features of CAFs delineated at DSCT in 48 CAF patients detected from consecutive 6624 patients with suspected or confirmed coronary artery disease in our institution. Methods Forty-eight patients underwent DSCT angiography by using retrospective electrocardiographic （ECG） gating after infusion of 70 ml of intravenous contrast material during breath hold. Maximum intensity projection （MIP）, curved planar reconstruction （CPR）, and volume rendering technique （VR） were obtained. Anomalous termination of coronary artery in each subject was evaluated by two radiologists （with more than 10 years experience with cardiovascular imaging）, and disagreement between diagnosis readers was settled by a consensus reading. Ten of 48 patients also underwent traditional coronary angiography （CAG） simultaneously. Results In each CAF case, DSCT angiography clearly demonstrated the origin, the termination, the size of abnormal vessel and its course in relation to surrounding great vessels. CAF arising from right coronary artery was the most common type, left circumflex was the least one involved among three coronaries, and pulmonary artery was the most common drainage site. Aneurismal fistulous tract, coronary atherosclerosis, myocardial bridging and anomalous origin of coronary artery were also detected in this group. The demonstration of drainage sites in CAG was consistent with DSCT angiography in 9 patients, and judgment on one anomalous connection in CAG was inconsistent with that in DSCT angiography. Conclusions DSCT angiography could provide accurate delineation of anomalous communications, size and numbers

关键词： coronary vessel anomalies coronary artery disease computed tomography diagnosis

Metastable seed-crystals: epitaxial growth of branched-array organic heterostructure nanowires

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Science China Chemistry 2025年

作者： jin Feng Zhen-Yu Geng Ting-Yao Song Ying-Xin Ma Chuan-Zeng Wang Wei Zhang Hong-Tao Lin jin Zhou Shu-Ping Zhuo Shu-Hai Chen xue-Dong Wang School of Chemistry and Chemical Engineering Shandong University of Technology Institute of Functional Nano & Soft Materials (FUNSOM) Jiangsu Key Laboratory for Carbon-Based Functional Materials & DevicesSoochow University College of Chemistry and Chemical Engineering Hunan Normal University

Tunable light–matter interactions are exhibited by organic low-dimensional crystals, making these crystals a promising platform for organic photonics. However, the precise synthesis of organic low-dimensional crystals remains challenging due to the stochastic nature of molecular nucleation processes. Herein, the directed nucleation process is driven by the introduction of metastable seed-crystals as the trunk, which ultimately leads to branched-array organic heterostructures. The successful formation of organic heterostructures with high-density branched arrays is attributed to the highest attachment energy (Eatt（023）=-104.25 kcal mol-1) of the exposed （023） crystal plane during the seed-crystal growth route. Significantly, these as-prepared heterostructures inherently have an ultralow lattice mismatch ratio η of 0.7%between trunk and branch, which contributes to the multi-channel photon transportation. Therefore, this work provides valuable insights into a versatile synthetic strategy for accessing low-dimensional heterostructures for integrated optoelectronics.

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Study on Direct Reduction Characteristics of Iron Ore Coal Mixed Pellets

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Journal of Iron and Steel Research International 2000年第2期7卷 6-10页

作者： xue Zheng-hang YOU jin-zhou ZHOU Guo-fan Central Iron&Steel Research Institute University of Science and Technology Wuhan

In order to get DRI iron ore coal mixed pellets are reduced isothermally. The mechanisms of reduction desulphurization, iron oxide reduction and the structure regenesis of the coal mixed pellets during reduction have been studied. The effect of various processing factors on the quality of DRI and economy technological indices including compression strength, desulphurization rate, recovery rate, reaction fraction, carbon content and metallization are also researched.

关键词： iron ore coal mixed pellet DRI reduction desulphurization

Reduction characteristics of molybdenum trioxide with aluminum and silicon

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Rare Metals 2018年第7期37卷 621-624页

作者： hang-Yu Zhu Rong Gao Wu-Tao jin Long-Wu Qiu Zheng-Liang xue State Key Laboratory of Refractories and Metallurgy Wuhan University of Science and Technology School of Materials and Metallurgy Wuhan University of Science and Technology

Thermodynamics for reduction of molybdenum oxides by aluminum and silicon were calculated, and the results show that reduction reaction is feasible at a certain temperature region. Compared to the presence of CaO or CaCO3, reduction products of molybdenum trioxide with aluminum and silicon at various temperatures were detected by X-ray diffraction （XRD）. Results show that molybdenum trioxide is reduced by aluminum or silicon step by step, and the intermediate product is MOO2. At 1000 ℃, molybdenum trioxide could be reduced to metal Mo by aluminum, and in the presence of CaO, metal Mo as the reduction product appears even at 800 ℃. In contrast, silicon could barely reduce molybdenum trioxide to metal Mo even at 1200℃. In the presence of CaO or CaCO3, reducibility of silicon increases significantly, and the reduction products are metal Mo and MoSi2. Altogether, CaO or CaCO3 performs two major roles in reduction process： restraining sublimation of MoO3 and decreasing the temperature of reducing MoO3 to metal Mo.

关键词： Molybdenum trioxide Reduction Aluminum Silicon Metallothermic

Cerebral infarct secondary to traumatic internal carotid artery dissection

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World Journal of Clinical Cases 2020年第20期8卷 4773-4784页

作者： Guang-Ming Wang hang xue Zhen-Jie Guo jin-Lu Yu Department of Neurosurgery The First Hospital of Jilin UniversityChangchun 130021Jilin ProvinceChina

BACKGROUND Traumatic internal carotid artery dissection(TICAD)is rare and can result in severe neurological disability and even *** consensus regarding its diagnostic screening and management has been *** To investigate the clinical presentation,imaging features,diagnostic workup,and treatment of *** In this retrospective case series,emergency admissions for TICAD due to closed head injury were *** demographic,clinical,and radiographic data were retrieved from patient charts and the picture archiving and communication *** Six patients(five males and one female,age range of 43-62 years,mean age of 52.67 years)presented with *** accidents(4/6)were the most frequent cause of *** clinical presentation was always related to brain *** examination revealed dissection of the affected artery and corresponding brain *** the patients were definitively diagnosed with *** patient was treated conservatively,one patient underwent anticoagulant therapy,two patients were given both antiplatelet and anticoagulant drugs,and two patients underwent decompressive *** patient fully recovered,while three patients were disabled at *** patients died of refractory brain *** TICAD can cause catastrophic outcomes and even refractory brain *** and efficient diagnosis of TICAD is essential for initiating appropriate *** treatment of TICAD is challenging and variable and is based on clinician discretion on a case-by-case basis.

关键词： Internal carotid artery dissection Brain infarction Treatment Prognosis

Class numbers of cyclic 2-extensions and Gross conjecture over Q

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Science China Mathematics 2010年第9期53卷 2447-2462页

作者： Ouyang Yi xue hang Univ Sci & Technol China Dept Math Hefei 230026 Peoples R China

The Gross conjecture over Q was first claimed by Aoki in ***,the original proof contains too many mistakes and false claims to be considered as a serious *** paper is an attempt to find a sound proof of the Gross conjecture under the outline of *** reduce the conjecture to an elementary conjecture concerning the class numbers of cyclic 2-extensions of Q.

关键词： Gross conjecture class number cyclic 2-extension

Floor positioning method indoors with smartphone’s barometer

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Geo-Spatial Information Science 2019年第2期22卷 138-148,I0006页

作者： Min Yu Feng xue Chao Ruan hang Guo College of Computer Information and Engineering Jiangxi Normal UniversityNanchangChina Institute of Space Science and Technology Nanchang UniversityNanchangChina

This paper presents an indoor floor positioning method with the smartphone’s barometer for the purpose of solving the problem of low availability and high environmental dependence of the traditional floor positioning ***,an initial floor position algorithm with the“entering”detection algorithm has been ***,the user’s going upstairs or downstairs activities are identified by the characteristics of the air pressure ***,the moving distance in the vertical direction and the floor change during going upstairs or downstairs are estimated to obtain the accurate floor *** order to solve the problem of the floor misjudgment from different mobile phone’s barometers,this paper calculates the pressure data from the different cell phones,and effectively reduce the errors of the air pressure estimating the elevation which is caused by the heterogeneity of the mobile *** experiment results show that the average correct rate of the floor identification is more than 85%for three types of the cell phones while reducing environmental dependence and improving ***,this paper compares and analyzes the three common floor location methods–the WLAN Floor Location(WFL)method based on the fingerprint,the Neural Network Floor Location(NFL)methods,and the Magnetic Floor Location(MFL)method with our *** experiment results achieve 94.2%correct rate of the floor identification with Huawei mate10 Pro mobile phone.

关键词： Floor positioning smartphone’s barometer sensor calibration indoor location service

Cracking on a nickel-based superalloy fabricated by direct energy deposition

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China Foundry 2024年第4期21卷 311-318页

作者： xue Zhang Ya-hang Mu Liang Ma jing-jing Liang Yi-zhou Zhou Xiao-feng Sun jin-guo Li School of Materials Science and Engineering University of Science and Technology of ChinaShenyang 110016China Shi-changxu Innovation Center for Advanced Materials Institute of Metal ResearchChinese Academy of SciencesShenyang 110016China School of Materials Science and Engineering Northeastern UniversityShenyang 110819China

Cracks have consistently been a significant challenge limiting the development of additive manufactured nickel-based *** is essential to investigate the location of cracks and their forming *** study extensively examines the impact of solidification process,microstructural evolution,and stress concentration on crack initiation during direct energy deposition(DED).The results emphasize that the crack formation is significantly related to large-angle grain boundaries,rapid cooling *** caused by large-angle grain boundaries and a fast-cooling rate predominantly appear near the edge of the deposited *** cracks are more likely to form near the top of the deposited sample,due to the presence ofγ/γ'*** secondary dendritic arm and the carbides in the interdendritic regions can obstruct liquid flow during the final stage of solidification,which results in the formation of solidification cracks and *** work paves the way to avoid cracks in nickel-based superalloys fabricated by DED,thereby enhancing the performance of superalloys.

关键词： location cracks direct energy deposition nickel-based superalloys

On the fouling mechanism of polysulfone ultrafiltration membrane in the treatment of coal gasification wastewater

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Frontiers of Chemical Science and Engineering 2016年第4期10卷 490-498页

作者： xue Zou jin Li School of Civil Engineering Beijing Jiaotong University Beijing 100044 China College of Architectural Engineering North China University of Technology Beijing 100144 China

Membrane fouling has been investigated by using a polysulfone ultrafiltration membrane with the molecular weight cutoff of 20 kDa to treat crushed coal pressurized gasification wastewater. Under the conditions of different feed pressures, the permeate flux declines and rejection coefficients of pollutants referring to three parameters （total organic carbon （TOC）, chroma and turbidity） were studied. The membrane fouling mechanism was simulated with three classical membrane fouling models. The membrane image and pollutants were analyzed by scanning electron microscopy and gas chromatography-mass spectrography （GC-MS）. The results indicate that the permeate flux decreases with volume reduction factor before reaching a constant value. The rejection coefficients were also measured： fTOC = 70.5%,fc = 84.9% andfa- = 91%. Further analysis shows that the higher the feed pressure is, the sooner the permeate flux reaches constant value and the more sharply the permeate flux declines. Constant flux indicates a nonlinear growth with feed pressure （PF）： when Pr equals 1.2 bar, the mark for the critical flux, slight membrane fouling occurs; when PF exceeds 1.2 bar, cake layer pollution aggravates. Also the rejection coefficients of global pollutant increases slightly with PF, suggesting the possibility of cake compression when PF exceeds 1.2 bar. Through regression analysis, the fouling of polysulfone ultrafiltration membrane could be fitted very well by cake filtration model. The membrane pollutants were identified as phthalate esters and long-chain alkenes by GC-MS, and a certain amount of inorganic pollutants by X-ray photoelectron spectroscopy.

关键词： membrane fouling ultrafiltration membrane,coal gasification wastewater rejection coefficient