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Real Heat Flux Analysis of Continuously Casting Round Billet

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Journal of Iron and Steel Research International 2008年第1期15卷 25-29页

作者： ZHAN Hui-ying WANG Xu-dong guo Liang-liang yao Man School of Material Science and Engineering Dalian University of Technology Dalian 116024 Liaoning China

The distributions of heat flux along the height and the circumferential direction of round billet mould were measured *** influence of casting speed,carbon content,powder,and pouring temperature on the average longitudinal and circumferential heat flux in the ＂high heat flux region＂ was *** experimental and analytical results provide a basis for an intelligent mould with online detection of defects,adjustment of operational parameters,optimization of the monitoring system,and even prediction of abnormal heat transfer.

关键词： continuous casting mould heat flux round billet

Intestinal permeability in rats with CCI4-induced portal hypertension

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World Journal of Gastroenterology 2006年第3期12卷 479-481页

作者： guo-Xiang yao Zhong-Yi Shen Xin-Bo Xue Zhen Yang Department ofSurgery Tongji Hospital Tongji Medical College HuazhongUniversity of Science and Technology Wuhan 430030 HubeiProvince China Department of Surgery First Hospital DalianMedical College Dalian 116023 Liaoning Province China

AIM： To investigate the intestinal barrier changes in rats with CCh-induced portal hypertension. METHODS： The permeability of intestinal barrier detected by Lanthanum as a tracer was evaluated in rats. Bacterial translocation and plasma endotoxin were also determined. RESULTS： The incidence of bacterial translocation was 85% in rats with CCh-induced portal hypertension, which was significantly higher than that in control rats （20%, P〈0.01）. Plasma endotoxin level was significantly higher in experimental group than in control group. Permeability of the epithelial mucosa and pathological alteration were increased in the ileum and the microvilli became shorter and thinner in rats with portal hypertension. CONCLUSION： Bacterial translocation occurs in rats with CCh-induced portal hypertension and increased permeability between epithelial cells contributes to the translocation.

关键词： Portal hypertension Bacterial translocation Intestinal barrier

Density-matrix-formalism based scheme for polarization mode dispersion monitoring and compensation in optical fiber communication systems

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Optoelectronics Letters 2023年第12期19卷 739-743页

作者： DU Qiuping ZHANG Xia guo yao YANG Zhenshan ZHANG Xiaoguang School of Physics Science and Information Engineering Shandong Provincial Key Laboratory of Optical Communications Science and TechnologyLiaocheng UniversityLiaocheng 252000China State Key Laboratory of Information Photonics and Optical Communications Beijing University of Posts and TelecommunicationsBeijing 100876China

We propose a density-matrix-formalism based scheme to study polarization mode dispersion(PMD)monitoring and compensation in optical fiber communication *** to traditional monitoring and compensation schemes based on the PMD vector in the Stokes space,the scheme we proposed requires no auxiliary matrices and can be handily extended to any higher-dimensional modal space,which is advantageous in mode-division multiplexing(MDM)systems.A 28 GBaud polarization division multiplexing quadrature phase-shift keying(PDM-QPSK)coherent simulation system is built to demonstrate that our scheme can implement the monitoring and compensation of 170 ps large differential-group-delay(DGD)that far exceeds the typical DGDs in practical optical communication *** results verify the effectiveness of the density-matrix-formalism based scheme in PMD monitoring and compensation,thus pave the way for further applications of the scheme in more general MDM optical communication systems.

关键词： polarization communication fiber

Development of FHDS Type Catalyst for Deep Hydrodesulfurization of Diesel Fuel

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China Petroleum Processing & Petrochemical Technology 2005年第4期7卷 36-40页

作者： guo Rong yao Yunhai Zhou Yong Fushun Research Institute of Petroleum and Petrochemicals Fushun 113001

The FHDS type catalyst for deep hydrodesulfurization (HDS) of diesel fuel is a highactivity catalyst developed by FRIPP in order to meet the requirements of Chinese refiners for production of low-sulfur clean diesel fuel containing less than 300 ppm of sulfur. The FH-DS type catalyst has excellent HDS and HDN activity thanks to modification of alumina through incorporating additives, optimization of catalyst preparation and optimal combination of active *** low pressure the HDS activity of this catalyst is by 50% higher than that of domestic reference catalysts available in the market and is slightly better than that of foreign reference catalyst. When this catalyst is used for manufacture of clean ultra-low sulfur diesel (containing ＜30 ppm of S), its volumetric relative desulfurization activity is 46% higher than that of foreign reference catalyst, and this catalyst is an excellent catalyst for manufacture of low-sulfur clean diesel fuel derived from imported high-sulfur Kuwaiti and Arabian crude oils.

关键词：加氢脱硫催化剂柴油清洁燃料粗油低硫处理

Si_(3)N_(4)nanowires@pyrolytic carbon nanolayers coupled withhydroxyapatite nanosheets as reinforcement for carbon matrixcomposites with boosting mechanical and friction properties

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Journal of Materiomics 2023年第1期9卷 197-205页

作者： Lina Sun Leilei Zhang Xuemin Yin Yeye Liu yao guo Hongchao Sheng Xianghui Hou State Key Laboratory of Solidification Processing Shaanxi Key Laboratory of Fiber Reinforced Light Composite MaterialsNorthwestern PolytechnicalUniversityXi'an710072China Department of Materials Science and Engineering Jiangsu University of Science and TechnologyZhenjiang212003China Faculty of Engineering The University of NottinghamUniversity ParkNottinghamNG72RDUnited Kingdom

Extensive attention has been drawn to the development of carbon-matrix composites for application in the aerospace and military industry,where a combination of high mechanical strength and excellent frictional properties are ***,carbon-matrix composites reinforced by Si_(3)N_(4)nanowires@pyrolytic carbon nanolayers(Si_(3)N_(4nws)@PyCnls)coupled with hydroxyapatite nanosheets is *** Si_(3)N_(4nws)@PyCnls(SP)with coaxial structure could increase the surface roughness of Si_(3)N_(4nws)and promote the stress transfer to the carbon matrix,whereas the porous hydroxyapatite nanosheets favor the infiltration of the carbon matrix and promote the interfacial bonding between the SP and carbon *** carbon matrix composites reinforced by SP coupled with hydroxyapatite nanosheets(Si_(3)N_(4nws)@PyCnls-HA-C)exhibit excellent mechanical *** with the conventional Si_(3)N_(4nws)reinforced carbon composites,Si_(3)N_(4nws)@PyCnls-HA-C(SPHC)have 162%and 249%improvement in flexural strength and elastic modulus,***,the friction coefficient and wear rate decreased by 53%and 23%,*** study provides a co-reinforcement strategy generated by SP coupled with hydroxyapatite nanosheets for effective improvement of mechanical and frictional properties of carbon matrix composites that are used for aerospace and military industry applications.

关键词： Silicon nitride nanowire Coaxial structure Hydroxyapatite nanosheet Mechanical strength Friction performance Carbon matrix composites

Significance of platelet activating factor receptor expression in pancreatic tissues of rats with severe acute pancreatitis and effects of BN52021

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World Journal of Gastroenterology 2007年第21期13卷 2992-2998页

作者： Shi-Hai Xia Chun-Xiu Hu Zhi-Ling Zhao guo-Dong Xia yao Di Department of Gastroenterology Pancreas Center of Affiliated Hospital of Medical College of the Chinese People's Armed Police Forces Tianjin 300162 China

AIM:To investigate the dynamic changes and significance of platelet activating factor receptor (PAF-R) mRNA and protein in pancreatic tissues of rats with severe acute pancreatitis (SAP) and effects of BN52021 (Ginkgolide B). METHODS:Wistar male rats were randomly assigned to the negative control group (NC group),SAP model group (SAP group),and BN52051-remedy group (BN group),and each of the groups was divided into 6 subgroups at different time points after operation (1 h,2 h,3 h,6 h,12 h,and 24 h) (n=10 in each). PT-PCR and Western blot methods were used to detect PAF-RmRNA and protein expression in pancreatic tissues of rats respectively. Pathological examination of pancreatic tissues was performed and the serum amylase change was detected. RESULTS:Serum amylase and pathological results showed the that SAP model was successfully prepared,BN52021 was able to decrease serum amylase,and the pathological ratings in BN group at 3 h,6 h,and 12 h significantly decreased compared with those in the SAP group (8.85 ± 0.39 vs 5.95 ± 0.19,9.15 ± 0.55 vs 5.55 ± 0.36,10.10 ± 0.65 vs 6.72 ± 0.30,P < 0.05). The result of PAF-mRNA showed dynamic changes in SAP and BN groups,which increased gradually in early stage,reached a peak at 3 h (0.71 ± 0.14 vs 0.54 ± 0.14,0.69 ± 0.13 vs 0.59 ± 0.04,P < 0.05),and decreased gradually later. There were significant differences at each time point except 1 h and 2 h,when compared with those in the NC group (0.71 ± 0.14 or 0.69 ± 0.13 vs 0.47 ± 0.10,0.38 ± 0.08 or 0.59 ± 0.04 vs 0.47 ± 0.09,0.25 ± 0.07 or 0.29 ± 0.05 vs 0.46 ± 0.10,0.20 ± 0.06 or 0.20± 0.04 vs 0.43 ± 0.09,P < 0.05),whereas there was no significant difference between BN and SAP groups at each time point. The result of PAF-R protein showed that the change of PAF-R protein in the SAP group and the BN group was consistent with that of PAF-R mRNA. There were significant differences at each time point except 1 h,when compared with those in the NC group (0.90 ± 0.02 or 0.80 ± 0.05 vs 0.

关键词： Acute pancreatitis Platelet activating factor receptor BN52021

Constructing orthogonally structured graphene nanointerface on SiC nanowires reinforced carbon/carbon composites to boost mechanical strength and strength retention rate

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Journal of Materiomics 2024年第3期10卷 615-623页

作者： yao guo Shouyang Zhang Qiang Song Fei Zhao Longkang Cong Wei Li Ruimei Yuan State Key Laboratory of Solidification Processing Shaanxi Key Laboratory of Fiber Reinforced Light Composite MaterialsNorthwestern Polytechnical UniversityXi'an 710072China Advanced Interdisciplinary Research Center for Flexible Electronics Academy of Advanced Interdisciplinary ResearchXidian UniversityXi'an 710072China

Carbon/carbon composites with higher mechanical strength and better reliability at elevated tempera-tures are urgently needed to satisfy the practical applications *** nanowires(SiCNWs)modified C/C(SC-CC)composites have attracted an abundance of attention for their excellent mechanical *** further boost the mechanical strengths of composites and maximize the reinforcing efficiency of SiCNWs,we introduce orthogonally structured graphene nanosheets(OGNs)into SC-CC composites,in which OGNs are grafted on the SiCNWs via chemical vapor deposition(CVD)method,forming SC-G-CC *** from the nano-interface effects,uniform stress distribution,strong SiCNWs/PyC interfacial bonding and elevated stress propagation efficiency in the PyC matrix are achieved,thus SC-G-CC composites accomplish brilliant mechanical properties before and after 1,600℃ heat *** temperature rises to 2,100℃,SiCNWs lose efficacy,whereas OGNs with excellent thermal stability continue to play the nano-interface role in the PyC ***,SC-G-CC com-posites show better mechanical performance after 2,100℃ heat treatment,and the mechanical strength retention rate(MSR)of interlaminar shear strength,out-of-plane and in-plane compressive strength of SC-G-CC composites reach 61.0%,55.7%and 55.3%,*** work proposes an alternative thought for maximizing the potentiality of nanomaterials and edifies the mechanical modification of composites.

关键词： SiC nanowires Orthogonally structured graphene nanosheets Carbon/carbon composites Mechanical properties Heat treatment

Effects of quercetin on diabetic retinopathy and its association with NLRP3 inflammasome and autophagy

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International Journal of Ophthalmology(English edition) 2021年第1期14卷 42-49页

作者： Rong Li Lin Chen guo-Min yao Hong-Lin Yan Li Wang Department of Ophthalmology the First Affiliated Hospital of Xi’an Medical UniversityXi’an 710077Shaanxi ProvinceChina Department of Pharmacy the First Affiliated Hospital of Xi’an Medical UniversityXi’an 710077Shaanxi ProvinceChina Department of Drug Clinical Trial Institution the First Affiliated Hospital of Xi’an Medical UniversityXi’an 710077Shaanxi ProvinceChina Department of Scientific Research the First Affiliated Hospital of Xi’an Medical UniversityXi’an 710077Shaanxi ProvinceChina

AIM:To investigate the effects of quercetin on diabetic retinopathy(DR)and its association with nucleotidebinding oligomerization domain-like receptors 3(NLRP3)inflammasome and autophagy using retinal endothelial cell as an experimental ***:Human retinal microvascular endothelial cells(HRMECs)were cultured in vitro and assigned into the control group,high-glucose(HG)group,and HG+different concentrations of quercetin *** viability,migration,and tube formation in these groups was detected by MTT,transwell and matrigel assay,*** of NLRP3,apoptosis-associated speck-like protein(ASC),cysteiny aspartate-specific protease-1(Caspase-1)as well as microtubule-related protein 1 light chain 3(LC3)and Beclin-1 were detected by Western *** of IL-1β and IL-18 were detected by ELISA and cellular autophagy was detected by Cyto-ID■ autophagy detection ***:Under an HG condition,the viability,migration,tube formation of HRMECs,and the protein expressions of NLRP3,ASC,Caspase-1,IL-1β,IL-18,LC3,and Beclin-1 as well as autophagy were all *** inhibited angiogenesis of HRMECs as well as the expressions of NLRP3,ASC,Caspase-1,IL-1β,IL-18,LC3,Beclin-1,and autophagy of HRMECs under a HG *** inhibitory effects of quercetin on angiogenesis,NLRP3 inflammasome and autophagy increased with the increase of its ***:The therapeutic potential of quercetin in retinal neovascularization of DR,and inhibition of NLRP3 inflammasome and autophagy signaling pathway may be involved.

关键词： quercetin angiogenesis NLRP3 autophagy high glucose diabetic retinopathy

Grain yield and N uptake of maize in response to increased plant density under reduced water and nitrogen supply conditions

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Journal of Integrative Agriculture 2024年第1期23卷 122-140页

作者： Jingui Wei Qiang Chai Wen Yin Hong Fan yao guo Falong Hu Zhilong Fan QimingWang State Key Laboratory of Aridland Crop Science Lanzhou 730070China College of Agronomy Gansu Agricultural UniversityLanzhou 730070China College of Life Sciences Northwest Normal UniversityLanzhou 730070China

The development of modern agriculture requires the reduction of water and chemical N fertilizer *** the planting density can maintain higher yields,but also consumes more of these restrictive ***,whether an increased maize density can compensate for the negative effects of reduced water and N supply on grain yield and N uptake in the arid irrigated areas remains *** study is part of a long-term positioning trial that started in 2016.A split-split plot field experiment of maize was implemented in the arid irrigated area of northwestern China in 2020 to *** treatments included two irrigation levels:local conventional irrigation reduced by 20%(W1,3,240 m^(3)ha^(-1))and local conventional irrigation(W2,4,050 m^(3)ha^(-1));two N application rates:local conventional N reduced by 25%(N1,270 kg ha^(-1))and local conventional N(360 kg ha^(-1));and three planting densities:local conventional density(D1,75,000 plants ha^(-1)),density increased by 30%(D2,97,500 plants ha-1),and density increased by 60%(D3,120,000 plants ha^(-1)).Our results showed that the grain yield and aboveground N accumulation of maize were lower under the reduced water and N inputs,but increasing the maize density by 30% can compensate for the reductions of grain yield and aboveground N accumulation caused by the reduced water and N *** water was reduced while the N application rate remained unchanged,increasing the planting density by 30% enhanced grain yield by 13.9% and aboveground N accumulation by 15.3%.Under reduced water and N inputs,increasing the maize density by 30% enhanced N uptake efficiency and N partial factor productivity,and it also compensated for the N harvest index and N metabolic related enzyme *** with W2N2D1,the N uptake efficiency and N partial factor productivity increased by 28.6 and 17.6%under W1N1D2.W1N2D2 had 8.4% higher N uptake efficiency and 13.9% higher N partial factor productivity than W2N2D1.W1N2D2 improv

关键词： water and N reduction plant density maize grain yield N uptake compensation effect