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Influence of Fe Addition on Phase Transformation,Microstructure and Mechanical Property of Equiatomic NiTi Shape Memory Alloy

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Acta Metallurgica Sinica(English Letters) 2017年第8期30卷 762-770页

作者： ya-nan zhao Shu-Yong Jiang yan-Qiu Zhang Yu-Long Liang College of Mechanical and Electrical Engineering Harbin Engineering University Harbin 150001 China College of Materials Science and Chemical Engineering Harbin Engineering University Harbin 150001 China

Based on equiatomic nickel and titanium, three kinds of NiTiFe alloys with a nominal chemical composition of Ni49Ti49Fe2, Ni48Ti48Fe4 and Ni47Ti47Fe6 （at.%）, respectively, have been designed to investigate the influence of the addition of Fe element on phase transformation, microstructure and mechanical property of equiatomic NiTi shape memory alloy. The microstructures of three kinds of NiTiFe alloys are characterized by the equiaxed grains instead of the dendrites. Consequently, some Ti2Ni precipitates are found to distribute in the grains interior and at the grain boundaries. The content of Fe element has an important influence on mechanical property of NiTiFe alloy. With increasing content of Fe element, the strength of NiTiFe alloy increases substantially, but the plasticity decreases sharply. It can be concluded that pre- cipitation strengthening and solution strengthening play a significant role in enhancing the strength of NiTiFe alloy. In the case of three NiTiFe alloys, neither martensitic transformation nor reverse transformation can be observed in the range from -150 to 150 ~C. On the one hand, the phase transformation temperature is probably out of the scope of the present experimental temperature. On the other hand, the addition of Fe element probably suppresses first-order martensitic transformation or reverse transformation, and consequently the second-order-like phase transformation from an incom- mensurate stage to a commensurate stage can probably take place.

关键词： Shape memory alloy Mechanical property Microstructure Phase transformation

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Geodynamics of decratonization and related magmatism and mineralization in the North China Craton

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Science China Earth Sciences 2021年第9期64卷 1409-1427页

作者： Jin-Hui yaNG Lei XU Jin-Feng SUN Qingdong ZENG ya-nan zhao Hao WANG Yu-Sheng ZHU State Key Laboratory of Lithospheric Evolution Institute of Geology and GeophysicsChinese Academy of SciencesBeijing 100029China College of Earth and Planetary Sciences University of Chinese Academy of SciencesBeijing 100049China Key Laboratory of Mineral Resources Institute of Geology and GeophysicsChinese Academy of SciencesBeijing 100029China

The North China Craton(NCC)experienced strong destruction(i.e.,decratonization)during the Mesozoic,which triggered intensive magmatism,tectonism and thermal events and formed large-scale gold and other metal deposits in the eastern part of the ***,how the decratonization controls the formation and distribution of large-scale of gold and other metal deposits is not very *** on a large number of published data and new results,this paper systematically summarizes all the data for the rock assemblages,chronology,geochemistry and petrogenesis of Mesozoic magmatic rocks,as well as for the mineralizing ages of gold and other metal deposits and the evolution of the Mesozoic basins in the eastern *** results are used to restore the extensional rates of Mesozoic to Cenozoic basins and the strike-slip distance of the Tanlu Fault,to ascertain the location of the Paleo-Pacific plate subduction zones during the Mesozoic to Cenozoic,and to reconstruct the temporal and spatial distribution of Mesozoic gold and other metal deposits and magmatic rocks in the eastern *** is obtained that the magmatism and mineralization in the eastern NCC westward migrate from east to west during the Early to Middle Jurassic,but they eastward migrate from west to east during the Early *** metallogenesis of these deposits is genetically related to magmatism,and the magmas provided some ore-forming materials and fluids for the generation of metal *** geodynamic mechanism of decratonization and related magmatism and mineralization is proposed,i.e.,the westward low-angle subduction of the Paleo-Pacific slab beneath the NCC formed continental magmatic arc with plenty of porphyry Cu-Mo-Au deposits in the Jurassic,similar to the Andean continental arc in South *** mantle wedge was metasomatized by the fluids/melts derived from the subducting slab,laying a material foundation for hydrothermal mineralization in the Early *** the rollback of the

关键词： Decratonization Large-scale gold mineralization Mesozoic magmatism Geodynamics North China Craton

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Successful treatment of pancreatic accessory splenic hamartoma by laparoscopic spleen-preserving distal pancreatectomy:A case report

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World Journal of Gastrointestinal Oncology 2022年第5期14卷 1057-1064页

作者： Shao-yan Xu Bo Zhou Shu-Mei Wei ya-nan zhao Sheng yan Division of Hepatobiliary and Pancreatic Surgery Department of SurgeryThe Second Affiliated HospitalSchool of MedicineZhejiang UniversityHangzhou 310000Zhejiang ProvinceChina Department of Pathology The Second Affiliated HospitalSchool of MedicineZhejiang UniversityHangzhou 310000Zhejiang ProvinceChina Department of Ultrasound The Second Affiliated HospitalSchool of MedicineZhejiang UniversityHangzhou 310000Zhejiang ProvinceChina

BACKGROUND Pancreatic accessory spleen(PAS)is an uncommon congenital abnormality of the *** hamartoma(SH)is also ***,hamartoma in the PAS has not been reported thus *** report the first case *** SUMMARY A 26-year-old male presented with a one-month history of left upper quadrant abdominal pain,and computerized tomography(CT)examination suggested a mass in the pancreas *** patient then attended our hospital for diagnosis and ***,CT,and magnetic resonance imaging revealed a solid mass with cystic degeneration growing from the tail of the *** tumor marker carbohydrate antigen 19-9(CA19-9)increased to 96.7 U/mL(normal range 0-37 U/mL).An epidermoid cyst in a PAS was considered ***,a malignant tumor cannot be ruled *** performed laparoscopic surgery,and two pancreatic masses were found growing from the pancreatic *** two masses were so closely connected that preoperative imaging examinations suggested only one *** carefully isolated the masses from the splenic artery and vein.A laparoscopic spleen-preserving distal pancreatectomy was successfully *** pathological examination,the masses were well-defined,homogeneous red-tan,4×3,and 4.5×1.5 in size,*** of them was cystically *** microscopical examination,the mass contained unorganized small slit-like vascular channels enclosing red blood cells and lined with plump endothelial *** area of cytologic atypia was *** lymphoid aggregates were found in the intravascular *** pulp or fibrosis was not *** final diagnosis was pancreatic accessory SH with cystic *** the operation,CA19-9 was reduced to *** patient recovered well,and the 34-mo follow-up period was *** Here,we report the first case of pancreatic accessory SH.A laparoscopic spleen-preserving distal pancreatectomy was successfully *** patient recovered well and h

关键词： Pancreatic accessory spleen Splenic hamartoma Cystic degeneration Laparoscopic spleenpreserving distal pancreatectomy Case report

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Optical power limiting of ultrashort hyper-Gaussian pulses in cascade three-level system

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Chinese Physics B 2018年第10期27卷 357-361页

作者： Ji-Cai Liu Fen-Fen Guo ya-nan zhao Xing-Zhe Li Department of Mathematics and Physics North China Electric Power UniversityBeijing 102206China

Propagation of strong femtosecond hyper-Gaussian pulses in a cascade three-level molecular system is studied by solving numerically the Maxwell–Bloch equations by the iterative predictor-corrector finite-difference time-domain *** power limiting behavior induced by strong nonlinear two-photon absorption is observed for different orders of the femtosecond hyper-Gaussian pulses. Pulses of a higher order temporal profile are found to have a wider power range of optical limiting but a larger output saturation intensity. Both the output saturation value and the damage threshold of optical power limiting decrease with pulse duration increasing. The decrease of the pulse area along the pulse propagation is much slower than that obtained from the two-photon area theorem due to invalidity of the slowly varying amplitude approximation and the monochromatic field hypothesis.

关键词： optical power limiting two-photon absorption ultrashort hyper-Gaussian pulse cascade three-level system

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Pulmonary hypertension,nephrotic syndrome,and polymyositis due to hepatitis C virus infection:A case report

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World Journal of Gastroenterology 2023年第19期29卷 3040-3047页

作者： ya-nan zhao Guo-Hui Liu Chang Wang Yi-Xuan Zhang Ping yang Ming Yu Department of Cardiology China-Japan Union Hospital of Jilin UniversityChangchun 130033Jilin ProvinceChina

BACKGROUND Hepatitis C infection not only damages the liver but also often accompanies many extrahepatic *** of pulmonary hypertension(PH)caused by hepatitis C are rare,and incidences of concurrent nephrotic syndrome and polymyositis are even *** SUMMARY Herein we describe the case of a 57-year-old woman who was admitted to our department for intermittent chest tightness upon exertion for 5 years,aggravated with dyspnea for 10 *** relevant examinations she was diagnosed with PH,nephrotic syndrome,and polymyositis due to chronic hepatitis C infection.A multi-disciplinary recommendation was that the patient should be treated with sildenafil and macitentan in combination and *** treatment autoimmune symptoms,liver function,hepatitis C RNA levels,and cardiac parameters of right heart catheterization were monitored *** patient showed significant improvement in 6-min walking distance from 100 to 300 m at 3-mo follow-up and pulmonary artery pressure drops to 50 ***-term follow-up is needed to confirm further efficacy and *** Increasing evidence supports a relationship between hepatitis C infection and diverse extrahepatic manifestations,but it is very rare to have PH,nephrotic syndrome,and polymyositis in a single *** conducted a literature review on the management of several specific extrahepatic manifestations of hepatitis C.

关键词： Hepatitis C Nephrotic syndrome Polymyositis Pulmonary hypertension Case report

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Electrodeposition of chitosan/graphene oxide conduit to enhance peripheral nerve regeneration

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Neural Regeneration Research 2023年第1期18卷 207-212页

作者： ya-nan zhao Ping Wu Zi-Yuan zhao Fei-Xiang Chen Ao Xiao Zhi-Yi Yue Xin-Wei Han Yong Zheng Yun Chen Department of Biomedical Engineering and Hubei Province Key Laboratory of Allergy and Immune Related Disease School of Basic Medical SciencesWuhan UniversityWuhanHubei ProvinceChina Department of Interventional Radiology The First Affiliated Hospital of Zhengzhou UniversityZhengzhouHenan ProvinceChina Clinical Medical College Hubei University of Science and TechnologyXianningHubei ProvinceChina

Currently available commercial nerve guidance conduits have been applied in the repair of peripheral nerve ***,a conduit exhibiting good biocompatibility remains to be *** this work,a series of chitosan/graphene oxide(GO)films with concentrations of GO varying from 0-1 wt%(collectively referred to as CHGF-n)were prepared by an electrodeposition *** effects of CHGF-n on proliferation and adhesion abilities of Schwann cells were *** results showed that Schwann cells exhibited elongated spindle shapes and upregulated expression of nerve regeneration-related factors such as Krox20(a key myelination factor),Zeb2(essential for Schwann cell differentiation,myelination,and nerve repair),and transforming growth factorβ(a cytokine with regenerative functions).In addition,a nerve guidance conduit with a GO content of 0.25%(CHGFC-0.25)was implanted to repair a 10-mm sciatic nerve defect in *** results indicated improvements in sciatic functional index,electrophysiology,and sciatic nerve and gastrocnemius muscle histology compared with the CHGFC-0 group,and similar outcomes to the autograft *** conclusion,we provide a candidate method for the repair of peripheral nerve defects using free-standing chitosan/GO nerve conduits produced by electrodeposition.

关键词： chitosan electrodeposition free-standing graphene oxide nerve conduit nerve factors Schwann cells tissue engineerin

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What is responsible for acute myocardial infarction in combination with aplastic anemia? A case report and literature review

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World Journal of Clinical Cases 2022年第32期10卷 11955-11966页

作者： ya-nan zhao Wei-Wei Chen Xiao-Yu yan Kun Liu Guo-Hui Liu Ping yang Department of Cardiology China-Japan Union Hospital of Jilin UniversityChangchun 130000Jilin ProvinceChina Department of Cardiology Jilin Provincial Cardiovascular Research InstituteChangchun 130000Jilin ProvinceChina Department of Cardiology Jilin Provincial Engineering Laboratory for Endothelial Function and Genetic Diagnosis of Cardiovascular DiseaseChangchun 130000Jilin ProvinceChina

BACKGROUND Aplastic anemia(AA)complicated with myocardial infarction(MI)is rare and associated with poor ***,we present a case of AA with recurrent acute MI(AMI)in a patient treated with cyclosporine A(CsA)and *** this patient,we suspect the long-term use of medication linked to platelets *** SUMMARY In 2017,a 45-year-old man was rushed to the emergency department of China-Japan Union Hospital due to precordial pain for 5 *** on his symptoms,medical history,blood tests,and findings from coronary angiography(CAG),the patient was diagnosed with acute anterior wall,ST-segment elevated MI,Killip II grade,AA,and *** 2021,the patient was readmitted to the hospital for 2 h due to chest *** the patient’s platelet count was 30×109/L and he had severe thrombocytopenia,we performed CAG following platelet *** coherence tomography revealed lipid plaque and thrombus mass in his right coronary *** antithrombotic approach was adjusted to employ only anticoagulants(factor Xa inhibitors)and adenosine diphosphate inhibitors(clopidogrel)after assessing the risk of bleeding/thrombotic ***-term follow-up revealed that the patient had made a good *** Patients with AA should be closely monitored for the risk of thrombosis and cardiovascularevents, particularly when taking stanozolol or CsA for an extended period of time.

关键词： Aplastic anemia Myocardial infarction Cyclosporine A Stanozolol Percutaneous coronary intervention Case report

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Spontaneous dissection of proximal left main coronary artery in a healthy adolescent presenting with syncope:A case report

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World Journal of Clinical Cases 2022年第7期10卷 2341-2350页

作者： Sui-Feng Liu ya-nan zhao Chun-Wen Jia Tian-Yi Ma Shi-Da Cai Feng Gao Department of Cardiology Zhongshan HospitalXiamen UniversityXiamen 361000Fujian ProvinceChina

BACKGROUND Spontaneous coronary artery dissection(SCAD)is a frequent cause of acute coronary syndrome in young to middle-aged women with few or no traditional cardiovascular risk *** pain is the most frequently described presenting symptom,but syncope is extremely ***,we report on a 16-year-old girl who presented with an episode of syncope occurring during a *** significantly elevated troponin level,the diagnosis of the left main coronary artery SCAD with cardiogenic shock was *** SUMMARY A 16-year-old girl presented with an episode of *** injury markers were *** showed a mildly reduced left ventricular ejection fraction(50%).Although initially stable,she later experienced recurrent chest pain accompanying precordial ST segment elevation with dynamic changes and developed cardiogenic shock,necessitating emergent *** angiography demonstrated almost total occlusion at the ostium and proximal segment of the left main trunk coronary artery(LMT).Intravascular ultrasound confirmed a false lumen with prominent dissection in the *** coronary intervention assisted by intra-aortic balloon pump was conducted in the LMT.A 3.5 mm×24 mm everolimus-eluting stent was deployed to the focal lesions of the LMT.A postprocedural electrocardiogram showed alleviation of the precordial ST-segment *** diagnosis of SCAD was *** echocardiography showed an improved left ventricular ejection fraction(57%).The patient was asymptomatic during the ***-up *** SCAD should always be considered in the differential diagnosis of acute coronary syndrome presentations in low-risk patients,regardless of age.

关键词： Spontaneous coronary artery dissection Intravascular ultrasound percutaneous coronary intervention Case report

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Research on College English Teaching Model under the Computer Environment

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Social Networking 2019年第2期8卷 104-111页

作者： ya’nan zhao Cuiling zhao Baoding University Baoding China

The growing update of computer and global technology provides the raw energy for college English teaching to start a revolution and development. How to deal with the teaching methods by using computer network to build a pluralistic system of interactive teaching for college English curriculum is a serious problem. This paper combines the characteristics of college English teaching, exploring the teaching ways of teaching mode and multi-interaction network of college English. Besides, it also reviews the evidence which is based on independent learning theory and several learning models, analyses the relationship between the advantages of computer network teaching and learning ability of students and enhances the benefits between teaching in practice and computer networks teaching. According to the research and survey of the College English Teaching Model of a University, it validated the role in promoting new teaching model to improve students’ self-learning ability.

关键词： English Teaching Computer Environment Teacher-Center-Learning Student-Centered-Learning Learning Strategies

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Novel aqueous rechargeable nickel//bismuth battery based on highly porous Bi_(2)WO6 and Co_(0.5)Ni_(0.5)MoO_(4) microspheres

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Rare Metals 2023年第3期42卷 902-915页

作者： Wei-Wei Kang ya-nan zhao Wen-Qing Zhang Ying Sun Xue-Qin Zhang Gui-Yun Yi Guang-Xu Huang Bao-Lin Xing Chuan-Xiang Zhang Bao-Ping Lin College of Chemistry and Chemical Engineering Henan Polytechnic UniversityJiaozuo 454003China School of Chemistry and Chemical Engineering Southeast UniversityNanjing 211189China

Developing high performances aqueous rechargeable batteries is imperative and ***,a novel aqueous rechargeable nickel//bismuth battery is developed based on highly porous Bi_(2)WO_(6) and Co_(0.5)Ni_(0.5)MoO_(4) microspheres as electrode active *** Bi_(2)WO6 microspheres assembled from nanosheets as anode active materials can afford a specific capacity of179.2 mAh·g^(-1) at 1 A·g^(-1),rate capability of 74.7%in 1-20 A·g^(-1),and capacity retention of 57.2%for 1500 cycles at 15 A·g^(-1).Owing to the highly porous microsphere with’ribbon’-like and intertwined nanolayers morphology,the screened Co0.5Ni0.5MoO4 cathode active materials present an outstanding specific surface area of 293 m^(2)·g^(-1)and excellent electrochemical performance(such as superior specific capacity of 113.2 mAh·g^(-1) at 1 A·g^(-1),high rate performance of 51.8%in 1-15 A·g^(-1),and good capacity retention of 48.5%for 4600 cycles at15 A·g^(-1)).The corresponding aqueous rechargeable nickel//bismuth battery delivers the maximum energy density and power density of 35.8 Wh·kg^(-1) and3238.5 W·kg^(-1),*** present research would offer a worthwhile guidance for the effective construction of electrode active materials for aqueous rechargeable nickel//bismuth batteries.

关键词： Aqueous rechargeable batteries(ARBs) Porous Co_(0.5)Ni_(0.5)MoO_(4) Bi_(2)WO microspheres Energy storageandconversion

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