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Study on stable delivery of charged uniform droplets for freeform fabrication of metal parts

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Science China(Technological Sciences) 2011年第7期54卷 1833-1840页

作者： LUO Jun QI LeHua ZHOU JiMing xiao yuan YANG Fang School of Mechatronics Northwestern Polytechnical University Xi'an 710072 China Key Laboratory of Contemporary Design and Integrated Manufacturing Technology Ministry of Education Xi'an 710072 China

Electrostatic delivery of charged uniform metal droplets is a novel method to deposit metal parts with short process period and low cost. But the delivery process is unstable and delivery accuracy of charged droplets deteriorates because of actions of mutual interactions of closely charged droplets. A droplet generator with droplet charging and deflecting system has been established to find out the way for stably and accurately deflecting droplets. The parameters for generating uniform droplets were first studied. Then the droplet deflections and metal parts depositions with different charge methods were discussed. The results show that the unbalanced electrostatic repelling forces are the main factor to cause the unstable deflection of droplets. The droplets deflection distance can be predicted and controlled by balancing the repelling forces of charged droplets. The metal parts are stably deposited after combining the board charged pulse and substrate motion, indicating that the work can provide useful theoretical and experimental guide for droplet-based freeform fabrication.

关键词： electrostatic delivery uniform metal droplets metal parts freeform fabrication

BIVARIATE FRACTAL INTERPOLATION FUNCTIONS ON RECTANGULAR DOMAINS

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Journal of Computational Mathematics 2002年第4期20卷 349-362页

作者： xiao-yuan Qian (Department of Applied Mathematics, Dalian University of Technology, Dalian 116024, China) Department of Applied Mathematics Dalian University of Technology Dalian 116024

Non-tensor product bivariate fractal interpolation functions defined on gridded rectangular domains are constructed. Linear spaces consisting of these functions are introduced. The relevant Lagrange interpolation problem is discussed. A negative result about the existence of affine fractal interpolation functions defined on such domains is obtained.

关键词： fractal bivariate functions interpolation

Facile one-step synthesis of PdPb nanochains for high-performance electrocatalytic ethanol oxidation

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Rare Metals 2020年第7期39卷 792-799页

作者： Yong Zhang xiao-Lei yuan Feng-Lei Lyu Xu-Chun Wang xiao-Jing Jiang Mu-Han Cao Qiao Zhang Institute of Functional Nano and Soft Materials FUNSOM Jiangsu Key Laboratory for Carbon-Based Functional Materials and DevicesSoochow UniversitySuzhou 215123China School of Chemistry and Chemical Engineering Nantong UniversityNantong 226019China

The widespread application of direct ethanol fuel cells is hampered due to the low activity,high cost and poor operation durability of electrocatalysts for ethanol oxidation reaction(EOR).Herein,we report a one-pot synthetic method to synthesize PdPb3 nanochains with well-defined shape,size and composition via a solution-phase reduction *** morphology,composition distribution and structure characteristics of PdPb3 nanochains were investigated by transmission electron microscopy,X-ray photoelectron spectroscopy and X-ray *** to the unique structure,the as-obtained PdPb3 nanochains can manifest much higher mass activity(2523 mA·mg-1)and higher operation durability than commercial Pd/C(1272 mA·mg-1)during the EOR *** importantly,further CO-stripping measurements indicate that the incorporation of Pb species could favor the oxidative removal of CO intermediates on the Pd electrode at the negative potential and enhance the EOR activity and stability,making it possible to develop highly active and durable electrocatalysts.

关键词： PdPb Nanochains Ethanol oxidation reaction CO stripping Electrocatalysts

Knowledge Graph Enhanced Transformers for Diagnosis Generation of Chinese Medicine

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Chinese Journal of Integrative Medicine 2024年第3期30卷 267-276页

作者： WANG Xin-yu YANG Tao GAO xiao-yuan HU Kong-fa School of Artificial Intelligence and Information Technology Nanjing University of Chinese MedicineNanjing210023China School of Information Management Nanjing UniversityNanjing210023China Jiangsu Collaborative Innovation Center of Traditional Chinese Medicine in Prevention and Treatment of Tumor Nanjing210023China Jiangsu Province Engineering Research Center of TCM Intelligence Health Service Nanjing210023China

Chinese medicine(CM)diagnosis intellectualization is one of the hotspots in the research of CM *** traditional CM intelligent diagnosis models transform the CM diagnosis issues into classification issues,however,it is difficult to solve the problems such as excessive or similar *** the development of natural language processing techniques,text generation technique has become increasingly *** this study,we aimed to establish the CM diagnosis generation model by transforming the CM diagnosis issues into text generation *** semantic context characteristic learning capacity was enhanced referring to Bidirectional Long Short-Term Memory(BILSTM)with Transformer as the backbone ***,the CM diagnosis generation model Knowledge Graph Enhanced Transformer(KGET)was established by introducing the knowledge in medical field to enhance the inferential *** KGET model was established based on 566 CM case texts,and was compared with the classic text generation models including Long Short-Term Memory sequence-to-sequence(LSTM-seq2seq),Bidirectional and Auto-Regression Transformer(BART),and Chinese Pre-trained Unbalanced Transformer(CPT),so as to analyze the model ***,the ablation experiments were performed to explore the influence of the optimized part on the KGET *** results of Bilingual Evaluation Understudy(BLEU),Recall-Oriented Understudy for Gisting Evaluation 1(ROUGE1),ROUGE2 and Edit distance of KGET model were 45.85,73.93,54.59 and 7.12,respectively in this *** with LSTM-seq2seq,BART and CPT models,the KGET model was higher in BLEU,ROUGE1 and ROUGE2 by 6.00–17.09,1.65–9.39 and 0.51–17.62,respectively,and lower in Edit distance by 0.47–*** ablation experiment results revealed that introduction of BILSTM model and prior knowledge could significantly increase the model ***,the manual assessment indicated that the CM diagnosis results of the KGET model used

关键词： Chinese medicine diagnosis knowledge graph enhanced transformer text generation

High-temperature oxidation behavior of a cast Ti-47.5Al-2.5V-1.0Cr-0.2Zr alloy

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China Foundry 2022年第5期19卷 443-454页

作者： Xue-jian Lin Hong-jun Huang xiao-guang yuan Yin-xiao Wang Bo-wen Zheng xiao-jiao Zuo Ge Zhou School of Materials Science and Engineering Shenyang University of TechnologyShenyang 110870China

The oxidation behavior of the Ti-47.5Al-2.5V-1.0Cr-0.2Zr alloy at 900℃ was investigated at different oxidation times(5,20,60 and 100 h).The results show that the total weight gain of the alloy after 100 h at 900℃ oxidation is 9.1 g·m^(-2),and the oxidation rate decreases with oxidation *** oxides on the alloy surface are mainly TiO_(2) and Al_(2)O_(3).At the beginning of oxidation(5 h),the oxide film is relatively complete,thin,and the interface between the oxide layer and the matrix is virtually *** the end of oxidation(100 h),the thickness of the oxide film is expanded,cracking and spalling occur,and the spalling form is intra-film *** the same time,oxygen is mainly distributed in the oxide film and the oxygen content in the alloy substrate is reduced,confirming that the TiAl alloy has a certain oxidation stability at 900℃.From the outer surface of the oxide layer to the matrix,the TiO_(2) content increases and the Al_(2)O_(3) content *** proceeds to completion in this system via the dissolution and diffusion of O atom.

关键词： cast TiAl alloy high temperature oxidation oxidation film oxidation behavior

Syndromic and sporadic inflammatory/hyperplastic small-bowel polyps:a comparative study

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Gastroenterology Report 2015年第3期3卷 222-227页

作者： Xiuli Liu Derrick Chen Mohannad Dugum Bela Horvath Lisi yuan Shu-yuan xiao Department of Anatomic Pathology Cleveland ClinicClevelandOHUSA Department of Internal Medicine Cleveland ClinicClevelandOHUSA Department of Pathology University of ChicagoILUSA

Background:Inflammatory/hyperplastic small-bowel polyps(SBPs)occur either sporadically or in patients with a polyposis syndrome;however,comparison between these two settings of the histological features of SBPs has not been reported and the etiology of sporadic inflammatory/hyperplastic SBPs remains ***:Twenty-eight cases of sporadic inflammatory/hyperplastic SBPs and nine cases of syndromic SBPs were retrieved from the Department of Anatomic Pathology at the Cleveland ***-demographics and histological features were compared between the two ***:Patients with syndromic inflammatory/hyperplastic SBPs were younger(48 vs.63 years;P=0.007)and had higher rates of hemorrhagic telangiectasia(55.6%vs.0%;P=0.000),gastric polyps(87.5%vs.21.4%;P=0.001),and family history of colon cancer(62.5%vs.11.1%;P=0.014).Sporadic cases were more frequently associated with gastro-esophageal reflux(35.7%vs.0%;P=0.079)and anti-reflux medication use(55.6%vs.11.1%;P=0.026).Histologically,the syndromic SBPs were more often of pure intestinal type(45.4%vs.3.8%;P=0.005)and had prominent vessels(81.8%vs.42.3%;P=0.036).Conclusions:Patients with syndromic SBPs are younger and have higher rates of hemorrhagic telangiectasia,gastric polyps,and family history of colon ***,syndromic inflammatory/hyperplastic SBPs are more likely to be of pure intestinal type and to have prominent vessels.

关键词： hyperplastic polyp inflammatory polyp small bowel juvenile polyp polyposis

Lattice-Inversion Embedded-Atom-Method Interatomic Potentials for Group-VA Transition Metals

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Chinese Physics Letters 2011年第12期28卷 113-116页

作者： yuan xiao-Jian CHEN Nan-Xian SHEN Jiang Institute for Applied Physics University of Science and Technology BeijingBeijing 100083 Department of Applied Physics Hunan UniversityChangsha 410082 Department of Physics Tsinghua UniversityBeijing 100084

The lattice-inversion embedded-atom-method(LI-EAM)interatomic potential we developed previously[***.:*** 22(2010)375503]is extended to group-VA transition metals(V,Nb and Ta).It is found that considering interatomic interactions up to appropriate-distance-neighbor atoms is crucial to constructing accurate EAM potentials,especially for the prediction of surface *** LI-EAM interatomic potentials for group-VA transition metals are successfully built by considering interatomic interactions up to the fifth neighbor *** angular-independent potentials drastically promote the accuracy of the predicted surface energies,which match the experimental results well.

关键词： Transition Inversion neighbor

Expression and clinical significance of CD73 and hypoxia-inducible factor-1α in gastric carcinoma

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World Journal of Gastroenterology 2013年第12期19卷 1912-1918页

作者： xiao-Xia Lu Yi-Tian Chen Bing Feng xiao-Bei Mao Bo Yu xiao-yuan Chu Department of Medical Oncology Nanjing General Hospital of Nanjing Military Command Medical School of Nanjing University Department of Pathology Nanjing General Hospital of Nanjing Military Command

AIM: To investigate the expression of CD73 and hypoxia-inducible factor-1α (HIF-1α) in human gastric carcinoma, and explore their clinical significance and prognostic value. METHODS: CD73 and HIF-1α expressions were detected by immunohistochemistry in consecutive sections of tissue samples from 68 gastric carcinoma patients. The peritumor tissues 2 cm away from the tumor were obtained and served as controls. The presence of CD73 and HIF-1α was analyzed by immunohis-tochemistry using the Envision technique. RESULTS: CD73 and HIF-1α expressions in gastric carcinoma were significantly higher than those in gastric mucosal tissues as control (P < 0.001) and showed a close correlation (Spearman r = 0.390, P = 0.001). Overexpression of CD73 was positively correlated with differentiation of tumor (P = 0.000), histopathology (P = 0.041), depth of invasion (P < 0.001), nodal status (P = 0.003), metastasis (P = 0.013), and the American Joint Committee on Cancer (AJCC) stage (P < 0.001). High expression of HIF-1α was positively correlated with tumor diameter (P = 0.031), depth of invasion (P = 0.022), and AJCC stage (P = 0.035). The overall survival rate was low in the patients with high expression of CD73 (P < 0.001). Moreover, CD73+/HIF-1α+ patients had the worst prognosis (P < 0.001). CD73 expression was proven to be an independent predictor for patients with gastric carcinoma by both multivariate Cox regression analysis (P = 0.021) and receiver operating characteristic curves (P = 0.001).CONCLUSION: CD73 expression correlates closely with HIF-1α expression in gastric carcinoma. CD73 could be an independent prognostic indicator for gastric carcinoma.

关键词： CD73 Hypoxia-inducible factor-1α Gastric carcinoma Immunohistochemistry Prognosis

BMP-4 induced proliferation and oriented differentiation of rat hepatic oval cells into hepatocytes

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Asian Pacific Journal of Tropical Medicine 2015年第5期8卷 412-416页

作者： Zhi-Ming Wang xiao-Hua yuan Hong Shen Department of Hepatobiliary Surgery Xiangya HospitalCentral South University Institute of Medical Science Xiangya HospitalCentral South University

Objective:To explore the role of bone morphogenetic protein 4(BMP-4) in hepatic progenitor cells(HPCs).Methods:The effect of BMP-4 on rat hepatic oval cells was examined by using the WB-F344 rat hepatocytic epithelial stem-cell-like cell *** hepatocytic cell line could exert various hepatocytc functions including the secretion of albumin and *** was used to examine the effects of BMP-4 and its antagonist,Noggin,on the proliferation and differentiation of these cells,cellular uptake and excretion of indocyanine green,the periodic acid-schiff(PAS) assay for glycogen storage and the expression of hepatic ***:Our results showed for the first time that BMP-4 may acted as a potential inducer of hepatic differentiation in rat hepatic oval ***:This cell source offers a much-needed attractive and expandable source for future investigations of drug screening,stem cell technologies and cellular transplantation,in a society with increasing levels of liver disease and damage.

关键词： Bone morphogenetic protein-4 Transforming growth factor-β Hepatic progenitor cells Proliferation Differentiation