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Effect of solidification cooling rate on microstructure and tribology characteristics of Zn-4Si alloy

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international Journal of Minerals,Metallurgy and Materials 2024年第2期31卷 362-373页

作者： F.Akbari M.Golkaram S.Beyrami G.Shirazi K.Mantashloo R.Taghiabadi M.Saghafi Yazdi I.Ansarian department of Metallurgy and Material Science Imam Khomeini International University(IKIU)Qazvin ***Iran

The main objective of this work was to modify the microstructure and enhance the tribological properties of a new Zn-4Si al-loy through a high solidification cooling rate(SCR).According to the results,by increasing the SCR from 2.0 to 59.5℃/s the average size of primary Si particles and that of the grains reduced from 76.1 and 3780μm to less than about 14.6 and 460μm,***-ing the SCR also enhanced the microstructural homogeneity,decreased the porosity content(by 50%),and increased the matrix hardness(by 36%).These microstructural changes enhanced the tribological *** instance,under the applied pressure of 0.5 MPa,an in-crease in the SCR from 2.0 to 59.5℃/s decreased the wear rate and the average friction coefficient of the alloy by 57%and 23%,*** wear mechanism was also changed from the severe delamination,adhesion,and abrasion in the slowly-cooled alloy to the mild tribolayer delamination/abrasion in the high-cooling-rate-solidified sample.

关键词： zinc-silicon alloy primary silicon solidification cooling rate tribology sliding wear

Cardiotoxicity induced by fluoropyrimidine drugs in the treatment of gastrointestinal tumors

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World Journal of Gastrointestinal Oncology 2024年第2期16卷 251-254页

作者： Mo-Wei Kong Feng-Di Sun Zhen-Ying Pei Li Xu Ze-Bi Wang Yan Chen Shu-Qing Tang Ting-Fang Yang Guo-Xiang He department of Cardiology Guiqian International General HospitalGuiyang 550018Guizhou ProvinceChina department of Oncology Guiqian International General HospitalGuiyang 550018Guizhou ProvinceChina

In this editorial,we review the article published in World J Gastrointest Oncol 2019,11:*** specifically focus on the occurrence,clinical characteristics,and risk factors of fluoropyrimidine drug-related cardiotoxicity in patients with gastrointestinal *** significant advancements in diagnostic and therapeutic techniques that have reduced mortality rates associated with digestive system tumors,the incidence and mortality rates of treatment-related car-diotoxicity have been increasing,severely impacting the survival and prognosis of cancer *** drugs are widely used as antimetabolites in the treatment of malignant tumors,including gastrointestinal tumors,and they represent the second largest class of drugs associated with ***,there is often a lack of awareness or understanding regarding their cardiotoxic effects and associated risks.

关键词： Cardiotoxicity Gastrointestinal tumors Risk factors Fluoropyrimidine Chest pain

Finite-size-induced non-Hermitian phase transitions in real space

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Science China(Physics,Mechanics & Astronomy) 2024年第11期Mechanics & Astronomy) .卷 109-115页

作者： Hongfei Wang Biye Xie Wei Ren department of Physics International Center for Quantum and Molecular Structures Shanghai University School of Science and Engineering The Chinese University of Hong Kong

While non-Hermiticity provokes intriguing phenomena without Hermitian counterparts, e.g., the skin effect and the breakdown of bulk-boundary correspondence, attracting extensive attention both in fundamental physics and device engineering, the role of finite sizes therein remains elusive. Here, we propose a class of finite-size-induced non-Hermitian phase transitions, relying upon higher-order topological invariants associated with real-space wave functions. The phase diagrams for general non-Hermitian chiral models are further acquired to demonstrate our topological definition. Such phase transitions are elucidated qualitatively by an effective intercell coupling alteration that depends on finite sizes in respective directions. Besides, we mimic these phenomena by analogizing the circuit Laplacian in finite-size electric circuits with nonreciprocal couplings. The resultant admittance spectra agree with our theoretical predictions. Our findings shed light on the finite-size mechanism of non-Hermitian topological phase transitions and pave the way for applications in switching and sensing.

关键词： non-Hermitian phase transitions finite-size effects higher-order topological invariants

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The tangential k-Cauchy-Fueter type operator and Penrose type integral formula on the generalized complex Heisenberg group

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Applied Mathematics(A Journal of Chinese Universities) 2024年第1期39卷 181-190页

作者： REN Guang-zhen SHI Yun KANG Qian-qian department of Mathematics Zhejiang International Studies UniversityHangzhou 310023China department of Mathematics Zhejiang University of Science and TechnologyHangzhou 310023China

The tangential k-Cauchy-Fueter operator and k-CF functions are counterparts of the tangential Cauchy–Riemann operator and CR functions on the Heisenberg group in the theory of several complex variables,*** this paper,we introduce a Lie group that the Heisenberg group can be imbedded into and call it generalized complex *** investigate quaternionic analysis on the generalized complex *** also give the Penrose integral formula for k-CF functions and construct the tangential k-Cauchy-Fueter complex.

关键词： the generalized complex Heisenberg group the tangential k-Cauchy-Fueter type operator Penrose-type integral formula

Data-Driven Earthquake Multi-impact Modeling: A Comparison of Models

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international Journal of Disaster Risk Science 2024年第3期15卷 421-433页

作者： Hamish Patten Max Anderson Loake David Steinsaltz Information Management International Federation of Red Cross and Red Crescent Societies (IFRC) department of Statistics University of Oxford

In this study, a broad range of supervised machine learning and parametric statistical, geospatial, and non-geospatial models were applied to model both aggregated observed impact estimate data and satellite image-derived geolocated building damage data for earthquakes, via regression-and classification-based models, respectively. For the aggregated observational data, models were ranked via predictive performance of mortality, population displacement, building damage, and building destruction for 375 observations across 161 earthquakes in 61 countries. For the satellite image-derived data, models were ranked via classification performance(damaged/unaff ected) of 369,813 geolocated buildings for 26 earthquakes in 15 countries. Grouped k-fold, 3-repeat cross validation was used to ensure out-of-sample predictive performance. Feature importance of several variables used as proxies for vulnerability to disasters indicates covariate utility. The 2023 Türkiye–Syria earthquake event was used to explore model limitations for extreme events. However, applying the AdaBoost model on the 27,032 held-out buildings of the 2023 Türkiye–Syria earthquake event, predictions had an AUC of 0.93. Therefore, without any geospatial, building-specific, or direct satellite image information, this model accurately classified building damage,with significantly improved performance over satellite image trained models found in the literature.

关键词： Disaster risk modeling Earthquake impact models Machine learning Disaster statistics Satellite image-derived building damage

Density-based ship detection in SAR images:Extension to a self-similarity perspective

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Chinese Journal of Aeronautics 2024年第3期37卷 168-180页

作者： Xueqian WANG Gang LI Zhizhuo JIANG Yu LIU You HE department of Electronic Engineering Tsinghua UniversityBeijing 100084China Shenzhen international Graduate School Tsinghua UniversityShenzhen 518055China

Nonlocal self-similarity is an important property of Synthetic Aperture Radar(SAR)images to characterize the repetitiveness of features embodied by SAR images within nonlocal areas and has been used for enhancement of SAR *** SAR ship detectors often independently handle small sub-images cropped from a large marine SAR image and do not exploit the nonlocal self-similarity *** this paper,we propose a new ship detector from the perspective of nonlocal self-similarity in SAR images to improve the ship detection performance,basically including three stages:prescreening,intra-cue calculation,and inter-cue *** the prescreening stage,we design a new Histogram-based Density(HD)feature to rapidly select candidate sub-images potentially containing ship targets from a large SAR *** the intra-cue calculation stage,target cues within a single candidate sub-image are *** the inter-cue calculation stage,thanks to the nonlocal self-similarity among different candidate sub-images in terms of density features,we innovatively extract a weighted superpixel-HD map to obtain accumulated intracues across all the candidate ***,for each candidate sub-image,we fuse its inter-cue and intra-cue to obtain final detection *** results based on real SAR images show that our newly proposed method provides a better target-to-clutter contrast and ship detection performance than those of other state-of-the-art detection approaches.

关键词： Ship detection Synthetic aperture radar(SAR) Density Self-similarity Histogram

A step forward in breeding for ratooning ability in rice

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Molecular Plant 2024年第3期17卷 368-369页

作者： Amelia Henry Rice Breeding Innovations department International Rice Research InstituteLos BanosLagunaPhilippines

Rice ratoon cropping,or the cultivation of tillers that have regrown from existing stem nodes of a harvested crop,is currently a hot topic in agriculture,and record-high ratoon crop yields have been achieved in China(Xu et al.,2021).Although rice ratoon cropping is most appropriate for certain agro-ecosystems with a suitable climate and cropping schedule,it is a promising strategy to simultaneously increase productivity while reducing inputs and *** ratoon cropping may thereby contribute to global food security and agro-ecosystem sustainability.

关键词： breeding cropping thereby

Effect of information-motivation-behavioral skills model based perioperative nursing on pain in patients with gallstones

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World Journal of Gastrointestinal Surgery 2024年第7期16卷 2232-2241页

作者： Li Ma Ying Yu Bin-Juan Zhao Yan-Nan Yu Yu Li department of Nursing Xi’an International Medical Center HospitalXi’an 710100Shaanxi ProvinceChina department of Hepatobiliary Pancreatic and Spleen SurgeryXi’an International Medical Center HospitalXi’an 710100Shaanxi ProvinceChina

BACKGROUND The incidence of cholecystolithiasis is on the *** of information,motivation,and behavioral skills can play a positive role in promoting changes in individual health ***,reports on the effects of information-motivationbehavioral(IMB)skills model based high-quality nursing as a perioperative nursing intervention for patients with gallstones are *** To explore the application of IMB skills model based high-quality nursing in patients with *** Two hundred and sixteen patients with cholecystolithiasis treated at our hospital from January 2022 to January 2023 were enrolled and divided into a control,highquality,and combined nursing groups,with 72 patients in each *** control,high-quality,and combination groups received conventional,high-quality,and IMB skills model based perioperative nursing services,*** in clinical indicators,stress levels,degree of pain,emotional state,and quality of life were observed,and complications and nursing satisfaction among the three groups were *** After nursing,the time to recovery of gastrointestinal function in the high-quality and combined nursing groups was significantly shorter than that of the control group,with the recovery of gastrointestinal function being the fastest in the combined nursing group(P<0.05).After nursing intervention,cortisol and norepinephrine levels in the high-quality and combined nursing groups were closer to normal than those of the control group 24 h after surgery,with the combined nursing group having the closest to normal levels(P<0.05).After 3 and 7 d of intervention,the patients’pain significantly improved,which was more prominent in the highquality and combination ***,the pain score in the combination group was significantly lower than those of the control and high-quality nursing groups(P<0.05).After nursing intervention,the emotional states of all patients improved,and the scores of patients in

关键词： Biliary calculi Information-motivation-behavioral skills model High quality care Perioperative period Pain Application

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World Journal of Gastroenterology 2024年第26期30卷 3206-3209页

作者： Mo-Wei Kong Xin-Rui Li Yu Gao Ting-Fang Yang department of Cardiology Guiqian International General HospitalGuiyang 550018Guizhou ProvinceChina department of Endocrinology The Affiliated Hospital of Chengde Medical CollegeChengde 067000Hebei ProvinceChina department of Oncology Guiqian International General HospitalGuiyang 550018Guizhou ProvinceChina

In this editorial,we review the work of Razali et al published in World J Gas-troenterology,with a particular focus on the effect of rs10889677 variation in the phosphatidylinositol 3-kinase(PI3K)pathway and buparlisib on colitis-associated *** role of PI3K in promoting cancer progression has been widely recognized,as it is involved in regulating the survival,differentiation,and prolif-eration of cancer *** complement Clq/TNF-related protein 6(CTRP6)is a newer tumor-associated *** studies have revealed the pro-tumor effect of CTRP6 in gastric cancer,hepatocellular carcinoma,colorectal cancer,and other gastrointestinal tumors through the PI3K *** article attempts to reveal the mechanism through which the CTRP6 affects the development of digestive system tumors through the PI3K pathway by summarizing recent research.

关键词： Phosphatidylinositol 3-kinase Complement Clq/TNF-related protein 6 Gastric cancer Colorectal cancer Tumor-related factor