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World Journal of Gastroenterology 2014年第10期20卷 2704-2714页

作者： ming Bai Xing-Shun qi Zhi-Ping yang Man yang Dai-ming Fan Guo-Hong Han Department of Digestive Interventional Radiology State Key Laboratory of Cancer Biology Xijing Hospital of Digestive Diseases Fourth Military Medical University Department of Digestive Interventional Radiology Xijing Hospital of Digestive Diseases Fourth Military Medical University

AIM: To compare the liver transplantation-free (LTF) survival rates between patients who underwent transjugular intrahepatic portosystemic shunts (TIPS) and those who underwent paracentesis by an updated meta-analysis... 详细信息

关键词： Transjugular intrahepatic portosystemic shunt Ascites Paracentesis Survival Meta-analysis

Calculation Methods of Added Resistance and Ship Motion Response Based on Potential Flow and Viscous Flow Theory

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China Ocean Engineering 2022年第3期36卷 488-499页

作者： WU qi-ming ZHANG Bao-ji Shanghai Maritime University College of Ocean Science and EngineeringShanghai 201306China

To improve the energy efficiency of ships and to predict ship motion response under actual sea conditions,the far-field theory,strip theory,and Fujii and Takahashi’s modified semi-empirical method are based and studied to calculate the wave-induced added ***,a new modified formula based on the Maruo method is presented to calculate the radiation added resistance for the ship with a complex ***,some calculation details such as the Green function,the shape of the sections(shape below the still water level or shape below the wave level)in the strip theory,and so on are ***,the CFD method is used to simulate the motions of the hull and the added resistance,and the results of the CFD method and those of other numerical methods are analyzed and compared with the experiment *** modified method in the paper can predict the added resistance in waves for the complex-hull-surface ships well and quickly.

关键词： wave-induced added resistance strip theory computation fluid dynamics motion response

Pyrometallurgical recycling of stainless steel pickling sludge: a review

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Journal of Iron and Steel Research International 2019年第6期26卷 547-557页

作者： Cong-cong yang Jian Pan De-qing Zhu Zheng-qi Guo Xiao-ming Li School of Minerals Processing and Bioengineering Central South University Changsha 410083 Hunan China School of Metallurgical Engineering Xi'an University of Architecture and Technology Xi'an 710055 Shaanxi China

Stainless steel pickling sludge (SSPS), generated from the lime neutralization process of spent pickling liquor, is classified as a hazardous waste consisting of abundant metals like Fe, Cr and Ni, and other elements like F, S and Na, etc. Rather than a common disposal in landfill, recovering these metals and other valuable components from SSPS can not only create economic benefits, but also eliminate its adverse impacts on human health and the environment. A review of the formation mechanism and basic properties of SSPS was made, and the technical features, advantages and limitations of a series of pyrometallurgical treatment processes were summarized. Based on these, the main challenges for recycling of SSPS through the existing techniques are demonstrated. The traditional pelletizing/sintering-blast furnace process can only be used as a partial solution. Direct use of SSPS as flux in an argon-oxygen decarburization converter or electric arc furnace is a promising way, but low S sludges are preferred. The STAR process shows excellent recovery for metals, but it also has a low tolerance to the S and F contents in SSPS. And theINMETCO process is highly flexible in treatment of various wastes, whereas it exhibits relatively low Cr recovery and produces poor-quality pig iron. In addition, the feasibility of the rotary kiln-electric furnace, solid -state reduction of chromite and reduction-magnetic separation processes requires further studies. An urgent task at present is to develop a system for scientific classification and separate collection of SSPS in terms of chemical composition, notably S and F contents.

关键词： Stainless steel pickling sludge Hazardous waste Recycling Pyrometallurgical process Reduction Recovery

Transient acceleration in f(T) gravity

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Research in Astronomy and Astrophysics 2016年第2期16卷 13-18页

作者： Jing-Zhao qi Rong-Jia yang ming-Jian Zhang Wen-Biao Liu Department of Physics Institute of Theoretical Physics Beijing Normal University College of Physical Science and Technology Hebei University

Recently an f （T） gravity based on the modification of teleparallel gravity was proposed to ex-plain the accelerated expansion of the universe. We use observational data from type Ia supernovae, baryon acoustic oscillations, and cosmic microwave background to constrain this f（T） theory and reconstruct the effective equation of state and the deceleration parameter. We obtain the best-fit values of parameters and find an interesting result that the constrained f（T） theory allows for the accelerated Hubble expansion to be a transient effect.

关键词： f(T) gravity cosmology -- reconstruction -- observation

Delayed cardiac tamponade after simultaneous transcatheter atrial septal defect closure and left atrial appendage closure device implantation: a particular case report

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Journal of Geriatric Cardiology 2019年第12期16卷 898-901页

作者： Jian-ming WANG qi-Guang WANG Xian-yang ZHU Department of Congenital Heart Disease General Hospital of Northern Theater Command

Percutaneous left atrial appendage(LAA)occlusion evolved as an alternative treatment to the patients who are contraindicated or cannot tolerate oral anticoagulants with nonvalvular atrial fibrillation(AF)at risk of stroke or systemic embolism.[1]Abnormal hemodynamic changes in elder atrial septal defect(ASD)patients cause remodeling of the left atrium,which eventually leads to right heart failure.[2]As the ASDs elderly are associated with a higher incidence of AF,simultaneous transcatheter ASD and LAA closure has become a new effective therapeutic ***,only a limited number of articles involving cardiac tamponade complications have been published in the ***’s more,previous studies involving early hemodynamically irrelevant pericardial effusion after the procedure attribute to multiple repositioning attempts of LAA occluder or delivery sheath injured the atrial wall.

关键词： Atrial fibrillation Atrial septal defect Cardiac catheterization Cardiac tamponade Left atrial appendage

Isometric Embeddings of Subsets of Boundaries of Teichmüller Spaces of Compact Hyperbolic Riemann Surfaces

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Acta Mathematica Sinica,English Series 2020年第5期36卷 605-619页

作者： Guang ming HU Yi qi College of Science Jinling Institute of TechnologyNanjing 211169P.R.China LMIB and School of Mathematics and Systems Science Beihang UniversityBeijing 100191P.R.China

It is known that every finitely unbranched holomorphic covering π:S→S of a compact Riemann surface S with genus g≥2 induces an isometric embedding Φπ:Teich(S)→Teich(S).By the mutual relations between Strebel rays in Teich(S)and their embeddings in Teich(S),we show that the 1 st-strata space of the augmented Teichmüller space Teich(S)can be embedded in the augmented Teichmüller space Teich(S)***,we show that Φπ induces an isometric embedding from the set Teich(S)B(∞)consisting of Busemann points in the horofunction boundary of Teich(S)into Teich(S)B(∞)with the detour metric.

关键词： Teichmüller space augmented Teichmüller space Strebel ray Busemann points

Grain size characteristics of the carbonate-free fraction of surface sediments from the Southwest Indian Ridge area and its geological significance

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Acta Oceanologica Sinica 2019年第2期38卷 34-43页

作者： qi Jia Dejiang Fan Xiaoxia Sun ming Liu Wenqiang Zhang Zuosheng yang Key Laboratory of Submarine Geosciences and Prospecting Techniques of Ministry of Education Ocean University of China Laboratory for Marine Geology and Environment Pilot National Laboratory for Marine Science and Technology (Qingdao)

The carbonate-free fraction of 20 surface sediments collected from the ultraslow-spreading Southwest Indian Ridge(SWIR) was studied by grain size analysis and mineralogical analysis with X-ray powder diffraction(XRD),stereo microscopy and scanning electron microscopy(SEM). The characteristics of the carbonate-free fraction of the sediments were obtained, and related influential factors were discussed. The results show that the mean grain size of this fraction is in 1.96Φ–8.19Φ, with poorly sorting and unimodal, bimodal or irregular bimodal distribution patterns. Four grain size end members of the fraction are derived with the End Member Model method. The finest end member EM1 shows a significant contribution of terrigenous materials of the aeolian input and sediment carried by the bottom current. End member EM2 with medium size mainly reflects sediment of a siliceous bioclast origin. EM3 and EM4 are interpreted as representing the coarser volcanic materials related to bedrock weathering or volcanic activities. Multi-provenance is the dominant factor controlling the grain size pattern of the carbonate-free fraction of the sediments in that area. In addition, sediment transport processes such as the bottom current and wind are the minor factors that influence the grain size distribution of the carbonate-free fraction sediments.

关键词： Southwest Indian Ocean carbonate-free fraction grain size distribution pattern end member model provenance

CATALYTIC ACTIVITY OF TRANSITION METAL SUBSTITUTED POLYOXOMETALATES FOR ALKENE EPOXIDATION

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Chinese Chemical Letters 1995年第2期6卷 155-158页

作者： Jing Fu LIU qi Hua yang ming Xiu LI Dgpartment of Chemistry Northeast Normal UniversityChangchun130024

The alkene cpoxidation by iodosylbenzene can be catalyzed by transition metal substituted polyoxometalates. Among the polyoxomctalates examined β-SiW9M3 and ZnW11Ti was found to be the most cfficient catalyst. The ox... 详细信息

关键词： ?

Relationship between glycemic variability and cognitive function in lacune patients with type 2 diabetes

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World Journal of Clinical Cases 2023年第5期11卷 1019-1030页

作者： qi-Zhe Meng yang Wang Bing Li Zhi Xi ming Wang Jia-qi Xiu Xiao-Peng yang Department of Neurology The Second Affiliated Hospital of Zhengzhou UniversityZhengzhou 450003Henan ProvinceChina

BACKGROUND Lacunes are the manifestations of lacunar infarction which can lead many patients to the clinical outcome of disability or ***,the relationship between lacune burden,cognitive function and blood glucose fluctuation in patients with type 2 diabetes mellitus(T2DM)complicated with lacunes is not very *** To explore the correlation between glucose variability,lacune burden and cognitive function in patients with lacunes complicated with *** The clinical and imaging data of 144 patients with lacunes combined with T2DM were reviewed retrospectively.72 h continuous glucose monitoring was *** Montreal Cognitive Assessment was used to assess cognitive *** burden of lacunes was evaluated using magnetic resonance imaging *** logistic regression analysis was used to study the affecting the lacune load and cognitive impairment in *** predict the value of patients’cognitive impairment with lacunes complicated with T2DM,a receiver operating characteristic(ROC)curve and a nomogram prediction model were *** The standard deviation(SD)of the average blood glucose concentration,percentage coefficient of variation(%CV)and time of range(TIR)were significantly different between the low and the high load groups(P<0.05).The SD,%CV and TIR of the cognitive impairment group and non-cognitive impairment group were significantly different(P<0.05).SD(odds ratio(OR):3.558,95%confidence interval(CI):1.268-9.978,P=0.006),and%CV(OR:1.192,95%CI:1.081-1.315,P<0.05)were the risk factors for an increased infarct burden in lacunes patients complicated with ***(OR:0.874,95%CI:0.833-0.928,P<0.05)is a protective *** addition,an increased SD(OR:2.506,95%CI:1.008-6.23,P=0.003),%CV(OR:1.163,95%CI:1.065-1.270,P<0.05)were the risk factors for cognitive impairment in patients with lacunes complicated with T2DM,TIR(OR:0.957,95%CI:0.922-0.994,P<0.05)is a protective factor.A nomogram prediction model o

关键词： Blood glucose variability Lacunes Type 2 diabetes Cognitive impairment Nomograms

Directed Self-assembly of Vertical PS-b-PMMA Nanodomains Grown on Multilayered Polyelectrolyte Films

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Chinese Journal of Polymer Science 2020年第1期38卷 92-99,I0008页

作者： Kai Liu Chun-ming yang Bo-ming yang Lan Zhang Wen-Chao Huang Xiao-Ping Ouyang Fu-Gang qi Nie Zhao Feng-Gang Bian College of Materials Science and Engineering Xiangtan UniversityXiangtan 411105China Shanghai Synchrotron Radiation Facility Shanghai Advanced Research InstituteChinese Academy of SciencesShanghai201204China Shanghai Institute of Applied Physics Chinese Academy of SciencesShanghai201204China

Layer-by-layer polyelectrolyte self-assembly, a common method for preparing high-quality ultra-thin films, was employed to direct the self-assembly behavior of polystyrene-block-poly(methyl methacrylate)(PS-b-PMMA) block copolymer for the first time. Differing from the previous neutral polymer brushes anchored to silicon substrates via chemical modification, polyelectrolyte multilayers(PEMs) were anchored by electrostatic interaction and provided a stable, smooth, and neutral interface. In the present study, PS-b-PMMA was deposited on poly(acrylamide hydrochloride)/poly(acrylic acid)(PAH/PAA) PEMs prepared by layer-by-layer self-assembly to successfully yield vertical nanodomains after thermal annealing. Seven layered PEMs revealed an excellent, smooth surface, with a low roughness of 0.6 nm. The periodic structure with interlamellar spacing of 47 nm was determined by grazing-incidence small-angle X-ray scattering(GISAXS). The morphology of the PS-b-PMMA nanodomains depended on the polyanion-to-polycation concentration ratio, which is related to the interaction between the block copolymer and the substrate. Our results demonstrate that layer-by-layer self-assembly is a helpful method for the phase separation of block polymers and the fabrication of vertical, ordered nanodomains.

关键词： Block copolymer Polyelectrolyte Self-assembly GISAXS