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PM-compact Graphs and Vertex-deleted Subgraphs

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Acta Mathematicae Applicatae Sinica 2022年第4期38卷 955-965页

作者： Yi-pei ZHANG xiu-mei WANG Jin-jiang YUAN School of Mathematics and Statistics Zhengzhou UniversityZhengzhou 450001China

The perfect matching polytope of a graph G is the convex hull of the incidence vectors of all perfect matchings of G.A graph G is PM-compact if the 1-skeleton graph of the prefect matching polytope of G is ***,a matchable graph G is PM-compact if and only if for each even cycle C of G,G-V(C)has at most one perfect *** paper considers the class of graphs from which deleting any two adjacent vertices or nonadjacent vertices,respectively,the resulting graph has a unique perfect *** PM-compact graphs in this class of graphs are presented.

关键词： perfect matching nice cycle bicritical graph PM-compact graph

Surgical approaches to correct corneal astigmatism at time of cataract surgery: a mini-review

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International Journal of Ophthalmology(English edition) 2024年第7期17卷 1370-1374页

作者： Xiao-Lei Yin Zhi-Yang Ji xiu-Xin Li Xue-mei liang Shu-Xing Ji Department of Ophthalmology the 305 Hospital of PLABeijing 100017China Department of Ophthalmology Daping HospitalArmy Medical UniversityChongqing 400042China Department of Medical Administration the 305 Hospital of PLABeijing 100017China

Among refractive errors,astigmatism is the most common optical aberration,where refraction changes in different meridians of the *** causes blurred vision at any distance and includes corneal,lenticular,and retinal *** surgery used to cause a progressive increase in the pre-exisiting corneal astigmatism because of creating a surgically induced astigmatism,for example,a large size surgery *** development of surgical techniques during last decades has made cataract surgery interchange to treat preoperative corneal astigmatism at time of ***,three surgical approaches can be *** placing a sutureless clear corneal incision on the steep meridian of the cornea,a preoperative corneal astigmatism less than 1.0 D can be *** or paired peripheral corneal relaxing incisions(PCRIs)provide 1.0-3.0 D corneal astigmatism *** are typically used for treating 1.0-1.5 D of regular corneal astigmatism,if more than 2.0 D,the risk of overcorrection and irregular astigmatism is *** toric intraocular lenses(IOLs)are unavailable in markets,PCRIs are still a reasonable option for patients with up to 3.0 D of pre-existing corneal *** IOLs implantation can correct 1.0-4.5 D of corneal *** IOLs are approved to correct a high degree of corneal astigmatism with cylinder power up to 12.0 *** approaches can be used alone or in combination.

关键词： cornea astigmatism cataract surgery peripheral corneal relaxing incisions toric intraocular lens

Application of multidisciplinary collaborative nursing with family care for enhanced recovery after surgery in children with inguinal hernia

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World Journal of Gastrointestinal Surgery 2023年第9期15卷 1932-1940页

作者： xiu-mei Wang Qiang Hou Department of Pediatric Surgery The Second Affiliated Hospital of Shandong First Medical UniversityTaian 271000Shandong ProvinceChina Department of Burns The Second Affiliated Hospital of Shandong First Medical UniversityTaian 271000Shandong ProvinceChina

BACKGROUND Perioperative nursing can reduce the stress reaction and improve the prognosis of *** To elucidate the influence of multidisciplinary collaborative nursing for enhanced recovery after surgery(ERAS)with family care in perioperative nursing children with an inguinal hernia and its impact on the *** The data of 100 children with inguinal hernia were retrospectively *** participants were divided into three groups according to different nursing methods:Groups A(n=38),B(n=32),and C(n=30).Group A received multidisciplinary collaborative ERAS nursing combined with family care nursing;Group B received multidisciplinary collaborative nursing for ERAS;and Group C received routine *** postoperative recovery results of the three groups were compared,including intraoperative blood loss and postoperative feeding time,time of getting out of bed,hospitalization time,and defecation ***,the incidence of common complications was also compared between the three *** There was less intraoperative blood loss in Groups A and B than in Group C(P0.05).Each index had no statistical significance between Groups A and B(P>0.05).The incidence of urinary retention,infection,hematoma,and hernia recurrence in Group A was less than that in Group C(P0.05).CONCLUSION The application of multidisciplinary collaborative nursing combined with family care in the perioperative care of children with an inguinal hernia for ERAS may promote postoperative rehabilitation for children and reduce the incidence of complications.

关键词： Multidisciplinary collaborative Enhanced recovery after surgery Family care Perioperative nursing Prognosis Postoperative complications

Electro-catalytic degradation properties of Ti/SnO_2–Sb electrodes doped with different rare earths

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Rare Metals 2016年第5期35卷 412-418页

作者： Fu-liang Zhu Yan-Shuang Meng xiu-Yang Huang State Key Laboratory of Gansu Advanced Nonferrous Metal Materials Lanzhou University of Technology School of Materials Science and Engineering Lanzhou University of Technology

Ti/SnO2–Sb electrode has a good effect on the removal of organic pollutants. But its short service life limits its large-scale application in industry. Electro-catalytic degradation performances and service life of the electrode can be significantly improved by doping rare earth（RE） ions into the oxide coating of Ti/SnO2–Sb electrode. Ti/SnO2–Sb electrodes doped with different RE elements（Ce, Dy, La, and Eu） were prepared by the thermal decomposition method at 550 ℃. Electro-catalytic degradation performances of electrodes doped with different RE elements were evaluated by linear sweep voltammetry（LSV） and Tafel curves. During the electrolysis,the conversion of p-nitrophenol was performed with these electrodes as anodes under galvanostatic control. The structures and morphologies of the surface coating of the electrodes were characterized by scanning electron microscope（SEM）. The results demonstrate that the electro-catalytic degradation performances of Ti/SnO2–Sb electrodes are improved to different levels by doping different RE ions. Improved Ti/SnO2–Sb electrodes by the introduction of different RE have higher oxygen evolution potential, better electro-catalysis ability, better coverage,and longer electrode life.

关键词： Ti/SnO_2–Sb electrode Rare earth doped Thermal decomposition method Catalytic degradation

Residual stress model of pre-stressed dry grinding considering coupling of thermal, stress, and phase transformation

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Advances in Manufacturing 2019年第4期7卷 401-410页

作者： Xiao-liang Shi Shi-Chao xiu Hui-Ling Su School of Mechanical Engineering and Automation Northeastern UniversityShenyang 110819People's Republic of China School of Metallurgy Northeastern UniversityShenyang 110819People's Republic of China

Pre-stressed dry grinding can result in a hardened layer on the part surface while the surface residual stress is *** the factors of the thermal field,pre-stress,and microstructural transformation,a proximate model of surface residual stress for pre-stressed dry grinding is established using the ANSYS finite element simulation method and verified through *** variation laws and mechanisms of the residual stress along with the grinding parameters are *** the comprehensive effect of pre-stress and phase transformation,the residual stress of pre-stressed dry grinding is revealed mainly as compressive *** increases as the pre・stress and grinding depth *** the coupling effect,pre-stress has larger influence on the residual stress than the grinding *** model can analyze and predict the residual stress of pre-stressed dry grinding in general.

关键词： Pre-stressed dry grinding Residual stress Finite element model Grinding thermal field Stress field Phase transformation

RESEARCH ON WAVE FORCES ACTING ON THE UNIT LENGTH OF A VERITICAL BREAKWATER BY TESTS AND A NUMERICAL MODEL

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Journal of Hydrodynamics 2006年第5期18卷 512-519页

作者： HU Jin-peng YU Yu-xiu ZHU liang-sheng LED South China Sea Institute Oceanology Chinese Academy of Sciences Guangzhou 510301 China Graduate School of the Chinese Academy of Sciences Beijing 100049 China Graduate School of the Chinese Academyof Sciences Beijing 100049China State Key Laboratory of Coastal and Offshore Engineering Dalian University of Technology Dalian 116024 China

Comprehensive 3D model tests and numerical simulation were performed to study the effects of wave obliquity and multidirectionality on the wave forces acting on vertical breakwaters. The variation of wave forces acting on the unit length of a breakwater was analyzed, and the results were compared with Goda＇s formula. A numerical model based on a short-crest wave system was used to model regular wave forces for practical use, which showed good results for those waves with small incident angles.

关键词： vertical breakwater uni- and multidirectional irregular waves wave forces acting on the unit length short-crest wave model

Study on Energy Spectrum Instability in the Processes of Propagating and Breaking of Focusing Waves

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China Ocean Engineering 2019年第1期33卷 86-93页

作者： ZHANG Yi-hui liang Shu-xiu SUN Zhao-chen State Key Laboratory of Lake Science and Environment Nanjing Institute of Geography and LimnologyChinese Academy of Sciences State Key Laboratory of Coastal and Offshore Engineering Dalian University of Technology

Based on phase focusing theory, focusing waves with different spectral types and breaking severities were generated in a wave flume. The time series of surface elevation fluctuation along the flume were obtained by utilizing 22 wave probes mounted along the mid-stream of the flume. Based on the wave spectrum obtained using fast Fourier transform(FFT), the instability characteristics of the energy spectrum were reported in this paper. By analyzing the variation of total spectral energy, the total spectral energy after wave breaking was found to clearly decrease, and the loss value and ratio gradually increased and tended to stabilize with the enhancement of breaking severity for different spectral types. When wave breaking occurred, the energy loss was primarily in a high-frequency range of f/fp>1.0, and energy gain was primarily in a low-frequency range of f/fp<1.0. As the breaking severity increased, the energy gain-loss ratio decreased gradually, which demonstrates that the energy was mostly dissipated. For plunging waves, the energy gain-loss ratio reached 24% for the constant wave steepness(CWS) spectrum, and was slightly larger at approximately 30% for the constant wave amplitude(CWA) spectrum, and was the largest at approximately 42% for the Pierson-Moskowitz(PM) spectrum.

关键词： phase focusing wave breaking wave surface wave steepness

Two new tetrahydronaphthalenes from the stem of Impatiens balsamina L.

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Chinese Chemical Letters 2010年第4期21卷 440-442页

作者： Chen, xiu mei Qian, Shi Hui Feng, Feng Jiangsu Prov Acad Tradit Chinese Med Nanjing 210028 Peoples R China China Pharmaceut Univ Dept Phytochem Nanjing 210009 Peoples R China

Two new tetrahydronaphthalenes,lα,2α-diol-4α-ethoxy-1,2,3,4-tetrahydronaphthalene(1) and 1a,2a,4β-triol-1,2,3,4- tetrahydronaphthalene(2),were isolated from the stem of Impatiens balsamina *** structures were eluc... 详细信息

关键词： Impatiens balsamina L. Balsaminaceae Tetrahydronaphthalene

Rising from Ashes:Non-Coding RNAs Come of Age

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Journal of Genetics and Genomics 2013年第4期40卷 141-142页

作者： Zicai liang xiu-Jie Wang Institute of Molecular Medicine Peking University The State Key Laboratory of Plant Genomics Institute of Genetics and Developmental BiologyChinese Academy of Sciences

It was recognized that a majority of the whole human genome is transcribed but only about 2% of genome actually encode all the proteins that were supposed, according to the central dogma, executing most of the biological functions of an organism. At an age proteins dominate, over 90% nonprotein coding regions were long regarded as trash, but nevertheless it was puzzling why god would allocate such a big portion of a genome to things without obvious meanings, and such curiosity has heightened when it was shown among various genome sequencing projects that the percentage of non-coding sequences is in almost strict correlation with the complexity of the organisms.

关键词： Rising from Ashes RNA