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Study of 0.9Al_2O_3–0.1TiO_2 ceramics prepared by a novel DCC-HVCI method

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Journal of Advanced Ceramics 2018年第2期7卷 152-159页

作者： jia-min WU Huan XIAO Meng-yue liU ying CHEN yi-Xin MA li-Jin CHENG Yu-Sheng SHI State Key Laboratory of Materials Processing and Die & Mould Technology School of Materials Science and EngineeringHuazhong University of Science and Technology

In this paper, in-situ coagulation of 0.9Al_2O_3–0.1TiO_2 suspension and microwave dielectric properties of 0.9Al_2O_3–0.1TiO_2 ceramics prepared by a novel direct coagulation casting via high valence counter ions(DCC-HVCI) method were proposed. The 0.9Al_2O_3–0.1TiO_2 suspension could be coagulated via controlled release of calcium ions from calcium iodate at an elevated temperature. The influence of tri-ammonium citrate(TAC) content, solid loading, and calcium iodate content on the rheological properties of the suspension was investigated. In addition, the influence of coagulation temperature on coagulation time and properties of green bodies was also studied. It was found that the stable 0.9Al_2O_3–0.1TiO_2 suspension could be successfully prepared by adding 0.3 wt% TAC and adjusting pH value to 10–12 at room temperature. 0.9Al_2O_3–0.1TiO_2 green bodies with uniform microstructures were coagulated by adding 8.0 g/L calcium iodate after treating at 70 ℃ for 1 h. 0.9Al_2O_3–0.1TiO_2 ceramics, sintered at 1500 ℃ for 4 h and annealed at 1100 ℃ for 5 h, showed uniform microstructures with density of 3.62±0.02 g/cm^3. The microwave dielectric properties of 0.9Al_2O_3–0.1TiO_2 ceramics prepared by DCC-HVCI method were: ε_r = 11.26±0.06, Q×f = 11569± 629 GHz, τ_t = 0.93±0.60 ppm/℃. The DCC-HVCI method is a novel and promising route without binder removal process to prepare complex-shaped microwave dielectric ceramics with uniform microstructures and good microwave dielectric properties.

关键词： rheological properties microwave dielectric properties 0.9Al2O3–0.1TiO2 DCC-HVCI

Helicity-dependent time delays in multiphoton ionization by two-color circularly polarized laser fields

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Frontiers of physics 2021年第5期16卷 3-9页

作者： Qing-Hua Ke yue-ming Zhou yi-Jie liao Jin-Tai liang Yong Zhao jia Tan min li Pei-Xiang Lu School of Physics and Wuhan National Laboratory for Optoelectronics Huazhong University of Science and TechnologyWuhan430074China Hubei Key Laboratory of Optical Information and Pattern Recognition Wuhan Institute of TechnologyWuhan430205China CAS Center for Excellence in Ultra-intense Laser Science Shanghai201800China

By numerically solving the three-dimensional time-dependent Schrödinger equation,we have investigated multiphoton ionization of hydrogen atom in the two-color circularly polarized(TCCP)laser fields consisting of a strong 400 nm and a much weaker 800 nm *** to the presence of perturbative 800 nm laser pulse,sideband peaks emerge between the above-threshold ionization rings in the photoelectron momentum *** numerical results show that the sideband peaks exhibit one-lobe structure in the co-rotating TCCP laser fields,while it displays the three-lobe structure in the counter-rotating TCCP laser ***,the photoelectron yield of sidebands in the co-rotating TCCP fields is much higher than those of the counter-rotating TCCP *** phenomena could be well explained from the perspective of the photon-absorption channels via the selection ***,an obvious phase shift between the sidebands of different orders from the co-rotating and counter-rotating TCCP fields is *** shift indicates the helicity-dependent time delay in the one-photon continuum-continuum transition process.

关键词： helicity-dependent time delay TCCP multiphoton ionization

NON-ISOTHERMAL CRYSTALliZTION KINETICS OF POLY(PHENYLENE SULFIDE) WITH LOW CROSSliNKING LEVELS

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Chinese Journal of Polymer Science 2013年第3期31卷 462-470页

作者： Fang-li lou yi Xu Huan Pang Yan-hui Chen jia-zhuang Xu 李忠明 Ai Lu College of Polymer Science and Engineering and State Key Laboratory of Polymer Materials Engineering Sichuan University Institute of Chemical Materials China Academy of Engineering Physics

Poly（phenylene sulfide）（PPS） with different crosslinking levels was successfully fabricated by means of high- temperature isothermal treatment （IT）. The crosslinking degree of PPS was increased with IT time as revealed by Fourier-transform infrared spectroscopy and dynamic viscosity measurements. Its influence on the non-isothermal crystallization behaviors of PPS was studied by differential scanning calorimeter （DSC）. The crystallization peak temperature of PPS with 6 h IT was 15 K higher than that of the one with 2 h IT at 30 K/min cooling rate. The non-isothermal crystallization data were also analyzed based on the Ozawa model. The Ozawa exponent m decreased from 3.5 to 2.2 at 232~C with the increase of the IT time, suggestive of intensive thermal oxidative crosslinking reducing the crystallite dimension as PPS crystal grew. The reduced cooling crystallization function K（T） was indicative of the larger activation energy of crosslinked PPS chain diffusion into crystal lattice, resulting in a slow crystal growth rate. Additionally, the overall crystallization rate of PPS was also accelerated with the increase of crosslinking degree from the observation of polarized optical micrograph. These results indicated that the chemical crosslinked points and network structures formed during the high-temperature isothermal treatment acted as the effective nucleating sites, which greatly promoted the crystallization process of PPS and changed the type of nucleation and the geometry of crystal growth accordingly.

关键词： Poly(p-phenylene sulfide) Crosslinking Non-isothermal crystallization Ozawa model.

Recent advances in glycerol valorization through electrocatalytic methods

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Tungsten 2024年第4期6卷 696-710页

作者： Hao-Hai Dong Yu-Xin Zhu yi-Gu li jia-Yan liang Ya Tan Xin-yue Zhang Hao-min jiang liu lin Ze-min Sun Center for Advanced Materials Research&College of Arts and Sciences Beijing Normal UniversityZhuhai519087China Department of Chemistry University College LondonLondonWC1H0AJUK

The recent tremendous growth of biodiesel production from vegetable oils or waste fats has led to increased glycerol accumulation as a by-product of this *** sparked attention towards glycerol use and valorization of this largely available and cheap *** several methods for glycerol valorization,electrochemical glycerol oxidation reaction(EGOR)is an attractive alternative anodic reaction to oxygen evolution reaction for a variety of electrolytic synthesis,due to the low thermodynamic ***,the EGOR at the anode can be coupled with a cathodic hydrogen evolution reaction to achieve efficient energy conversion in an aqueous electrolytic *** review provides a comprehensive summary and critical analysis of glycerol electrochemical oxidation research during the last 5 *** review focuses on the recent development and prospects of electrochemical pathways(indirect or direct routes)for application in the *** particular,the recent development and prospects of using noble and non-noble group metal catalysts for glycerol electro-oxidation are ***,reaction product selectivity analysis and conversion efficiency are also highlighted.

关键词： Glycerol Electrocatalytic methods Active oxygen species Noble metal catalysts Non-noble metal catalysts

Development and validation of novel models for the prediction of intravenous corticosteroid resistance in acute severe ulcerative colitis using logistic regression and machine learning

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Gastroenterology Report 2022年第1期10卷 498-506页

作者： Si Yu Hui li yue li Hui Xu Bei Tan Bo-Wen Tian yi-min Dai Feng Tian jia-ming Qian Department of Gastroenterology Peking Union Medical College HospitalChinese Academy of Medical Sciences&Peking Union Medical CollegeBeijingP.R.China Department of Gastroenterology Shengjing Hospital of China Medical UniversityShenyangLiaoningP.R.China

Background The early prediction of intravenous corticosteroid(IVCS)resistance in acute severe ulcerative colitis(ASUC)patients remains an unresolved *** study aims to construct and validate a model that accurately predicts IVCS *** A retrospective cohort was established,with consecutive inclusion of patients who met the diagnosis criteria of ASUC and received IVCS during index hospitalization in Peking Union Medical College Hospital between March 2012 and January *** primary outcome was IVCS *** models,including logistic regression and machine learning-based models,were *** validation was conducted in an independent cohort from Shengjing Hospital of China Medical *** A total of 129 patients were included in the derivation *** index hospitalization,102(79.1%)patients responded to IVCS and 27(20.9%)failed;18(14.0%)patients underwent colectomy in 3 months;6 received cyclosporin as rescue therapy,and 2 eventually escalated to colectomy;5 succeeded with infliximab as rescue *** Ulcerative Colitis Endoscopic Index of Severity(UCEIS)and C-reactive protein(CRP)level at Day 3 are independent predictors of IVCS *** areas under the receiver-operating characteristic curves(AUROCs)of the logistic regression,decision tree,random forest,and extreme-gradient boosting models were 0.873(95%confidence interval[CI],0.704–1.000),0.648(95%CI,0.463–0.833),0.650(95%CI,0.441–0.859),and 0.604(95%CI,0.416–0.792),*** logistic regression model achieved the highest AUROC value of 0.703(95%CI,0.473–0.934)in the external *** In patients with ASUC,UCEIS and CRP levels at Day 3 of IVCS treatment appeared to allow the prompt prediction of likely IVCS *** found no evidence of better performance of machine learning-based models in IVCS resistance prediction in ASUC.A nomogrambased on the logistic regression model might aid in the management of ASUC

关键词： acute severe ulcerative colitis steroid resistance colectomy machine learning

Prognostic significance of Borrmann type combined with vessel invasion status in advanced gastric cancer

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World Journal of Gastrointestinal Oncology 2020年第9期12卷 992-1004页

作者： Zhao Zhai Zi-Yu Zhu Yu Zhang Xin yin Bang-ling Han jia-liang Gao Sheng-Han lou Tian-yi Fang yi-min Wang Chun-Feng li Xue-Feng Yu Yan Ma ying-Wei Xue Department of Gastroenterological Surgery Harbin Medical University Cancer HospitalHarbin 150081Heilongjiang ProvinceChina

BACKGROUND Borrmann classification(types I-IV)for the detection of advanced gastric cancer has been accepted worldwide,and lymphatic and/or blood vessel invasion(LBVI)status is related to the poor prognosis after gastric *** To evaluate the significance of Borrmann type combined with LBVI status in predicting the prognosis of advanced gastric *** We retrospectively studied the clinicopathological characteristics and long-term survival data of 2604 patients who were diagnosed with advanced gastric adenocarcinoma at Harbin Medical University Cancer Hospital from January 2009 to December *** variables were evaluated by the Pearson’sχ^2 test,the Kaplan-Meier method was used to identify differences in cumulative survival rates,and the Cox proportional hazards model was used for multivariate prognostic *** A total of 2604 patients were included in this *** presence of LVBI[LBVI(+)]and Borrmann type(P=0.001),tumor location(P<0.001),tumor size(P<0.001),histological type(P<0.001),tumor invasion depth(P<0.001),number of metastatic lymph nodes(P<0.001),and surgical method(P<0.001)were significantly correlated with *** analyzing the combination of the Borrmann classification and LBVI status,we found that patients with Borrmann type Ⅲ disease and LBVI(+)had a similar 5-year survival rate to those with Borrmann IV+LBVI(-)(16.4%vs 13.1%,P=0.065)and those with Borrmann IV+LBVI(+)(16.4%vs 11.2%,P=0.112).Subgroup analysis showed that the above results were true for any pT stage and any tumor *** Cox regression analysis showed that Borrmann classification(P=0.023),vascular infiltration(P<0.001),tumor size(P=0.012),pT stage(P<0.001),pN stage(P<0.001),and extent of radical surgery(P<0.001)were independent prognostic factors for *** Since patients with Borrmann Ⅲ disease and LBVI(+)have the same poor prognosis as those with Borrmann IV disease,more attention should be paid to patients with Borrm

关键词： Advanced gastric cancer Borrmann type Vascular invasion Long-term survival

Laparoscopic spleen-preserving splenic hilar lymphadenectomy in 108 consecutive patients with upper gastric cancer

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World Journal of Gastroenterology 2014年第32期20卷 11376-11383页

作者： Ping li Chang-ming Huang Chao-Hui Zheng jian-Wei Xie jia-Bin Wang jian-Xian lin Jun Lu yi Wang Qi-yue Chen Department of Gastric Surgery Fujian Medical University Union Hospital

AIM: To evaluate the feasibility and short-term efficacy of laparoscopic spleen-preserving splenic hilar (No. 10) lymphadenectomy to treat advanced upper gastric cancer (AUGC).

关键词： Stomach neoplasms Spleen-preservation laparoscopy Gastrectomy Lymphadenectomy

Genome-wide association and linkage mapping strategies reveal the genetic loci and candidate genes of important agronomic traits in Sichuan wheat

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Journal of Integrative Agriculture 2023年第11期22卷 3380-3393页

作者： ZHANG Zhi-peng li Zhen HE Fang Lü Ji-juan XIE Bin yi Xiao-yu li jia-min li Jing SONG Jing-han PU Zhi-en MA jian PENG Yuan-ying CHEN Guo-yue WEI Yu-ming ZHENG You-liang li Wei State Key Laboratory of Crop Gene Exploration and Utilization in Southwest China Sichuan Agricultural UniversityChengdu 611130P.R.China College of Agronomy Sichuan Agricultural UniversityChengdu 611130P.R.China Triticeae Research Institute Sichuan Agricultural UniversityChengdu 611130P.R.China Sichuan Provincial Seed Station Chengdu 610044P.R.China Huaiyin Institute of Agricultural Sciences of Xuhuai Area in jiangsu Huai'an 223001P.R.China Beijing Foreign Studies University Beijing 100081P.R.China

Increasing wheat yield is a long-term goal for wheat breeders around the *** elite genetic resources and dissecting the genetic basis of important agronomic traits in wheat are the necessary methods for high-yield wheat *** study evaluated nine crucial agronomic traits found in a natural population of 156 wheat varieties and77 landraces from Sichuan,China in seven environments over two *** results of this investigation of agronomic traits showed that the landraces had more tillers and higher kernel numbers per spike (KNS),while the breeding varieties had higher thousand-kernel weight (TKW) and kernel weight per spike (KWS).The generalized heritability (H2) values of the nine agronomic traits varied from 0.74 to *** analysis suggested that the natural population could be divided into three groups using 43 198 single nucleotide polymorphism (SNP) markers from the wheat 55K SNP chip.A total of 67 quantitative trait loci (QTLs) were identified by the genome-wide association study (GWAS) analysis based on the Q+K method of a mixed linear *** important QTLs were analyzed in this *** haplotypes of ***-7BL.1 for fertile tillers number (FTN),three haplotypes of ***-1AL.2 for KNS,and four haplotypes of ***-3BS.1 for TKW were ***-Hap2,KNS-Hap1,and TKW-Hap2 were excellent haplotypes for each QTL based on the yield performance of 42 varieties in regional trials from 2002 to *** varieties with all three haplotypes showed the highest yield compared to those with either two haplotypes or one *** addition,the KASP-AX-108866053 marker of QTL ***-1AL.2 was successfully distinguished between three haplotypes(or alleles) in 63 varieties based on the number of kernels per spike in regional trials between 2018 and *** genetic loci and reliable makers can be applied in marker-assisted selection or map-based gene cloning for the genetic improvement of wheat yield.

关键词： Sichuan wheat GWAS yield traits haplotype analysis KASP

Changing trends of clinicopathologic features and survival duration after surgery for gastric cancer in Northeast China

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World Journal of Gastrointestinal Oncology 2020年第10期12卷 1119-1132页

作者： Zhao Zhai Zi-Yu Zhu Xi-liang Cong Bang-ling Han jia-liang Gao Xin yin Yu Zhang Sheng-Han lou Tian-yi Fang yi-min Wang Chun-Feng li Xue-Feng Yu Yan Ma ying-Wei Xue Department of Gastroenterological Surgery Harbin Medical University Cancer HospitalHarbin 150081Heilongjiang ProvinceChina

BACKGROUND Through analyzing the data from a single institution in Northeast China,this study revealed the possible clinicopathologic characteristics that influence the prognosis of patients with gastric cancer(GC).AIM To evaluate the changing trends of clinicopathologic features and survival duration after surgery in patients with GC in Northeast China,which is a highprevalence area of *** The study analyzed the difference in clinicopathologic features and survival duration after surgery of 5887 patients who were histologically diagnosed with GC at the Harbin Medical University Cancer *** study mainly analyzed the data in three periods,2000 to 2004(Phase 1),2005 to 2009(Phase 2),and 2010 to 2014(Phase 3).RESULTS Over time,the postoperative survival rate significantly increased from 2000 to *** the past 15 years,compared with Phases 1 and 2,the tumor size was smaller in Phase 3(Plinical features of GC in Northeast China changed during the observation *** increasing detection of early GC and more standardized surgical treatment effectively prolonged lifetimes.

关键词： Gastric cancer Clinicopathologic features Survival Time trends Epidemiology Gastrectomy