检索结果-南通市图书馆

Dynamics-based optimization of rolling schedule aiming at dual goals of chatter suppression and speed increase for a 5-stand cold tandem rolling mill

在线全文

学校读者我要写书评

暂无评论

Journal of Iron and Steel Research International 2021年第2期28卷 168-180页

作者： Zhi-ying Gao Bo Tian Yang Liu Li-yuan Zhang Mao-lin liao School of Mechanical Engineering University of Science and Technology BeijingBeijing 100083China

In the process of cold tandem rolling,chatter instability leads to serious impacts on enhancing rolling speed,improving product quality,reducing production cost and realizing *** occurs with the rolling speed up to a certain threshold value,but the critical speed is determined by both product specifications and rolling schedules.A 5-stand cold tandem rolling mill whose first three stands and subsequent two stands,respectively,have four and six rolls was investigated by formulating its dynamic equations with the corresponding structure-process *** applying the stability-based calculation model about the critical rolling speed in each stand,the system dynamic responses around the critical rolling speed were simulated,and the system eigenvalues which represent instability and characteristic frequencies were figured ***,via combining the critical rolling speeds with the system dynamic behavior,a dynamics-based optimization model of rolling schedule for the 5-stand cold tandem system was proposed for the purposes of both the chatter suppression and rolling speed *** the optimization model,eight rolling technique parameters(four strip thicknesses and four tensions between the upstream and downstream stands)were taken as design variables,and the constraint conditions were set as no chatter instability in all five stands,and the optimization goal was to maximize the outlet speed of the final *** pattern search method was introduced to solve the optimization *** applying such a dynamics-based optimization model for the 5-stand cold tandem rolling process,the chatter instability was suppressed effectively and the rolling efficiency was improved considerably;therefore,such an optimization model is expected to be valuable for intelligent manufacturing of rolling process.

关键词： Cold tandem rolling Chatter Critical rolling speed Rolling schedule Dynamics-based optimization Stability

Experimental studies on interaction of water mist with class K fires

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Chinese Science Bulletin 2006年第24期51卷 3053-3058页

作者： FANG Yudong ZHANG Yongfeng lin lin liao Guangxuan HUANG Xin CONG Beihua University of Science & Technology of China State Key Laboratory of Fire Science Hefei 230026 China

Interaction of water mist with cooking oil fires is studied experimentally and theoretically. A LDV/APV system is used to measure the velocity and diameter of water mist at different pressures in the experiments,and the effect of water mist velocity and diameter on fire extinguishment efficiency is investi-gated. The experimental results show that water mist has excellent surface cooling effect; it can control and extinguish cooking oil fires quickly without re-ignition. The critical temperature (Tfo) is calculated by energy balance equation,and the fire plume momentum is calculated and compared with that of water mist in order to determine the critical velocity (νwy) of fire extinguishment. This paper provides references for cooking oil fires extinguishment with water mist.

关键词：水雾 K级火灾食用油油类燃烧重新起火灭火效果

Metastasis-associated in colon cancer-1 in gastric cancer: Beyond metastasis

在线全文

学校读者我要写书评

暂无评论

World Journal of Gastroenterology 2016年第29期22卷 6629-6637页

作者： Zhen-Zhen Wu Li-Shan Chen Rui Zhou Jian-Ping Bin Yu-lin liao Wang-Jun liao Department of Oncology Nanfang Hospital Southern Medical University Medical Center for Overseas patients Nanfang Hospital Southern Medical University Department of Cardiology Nanfang Hospital Southern Medical University

Metastasis-associated in colon cancer-1(MACC1) is an oncogene that was first identified in colon cancer. The upstream and downstream of MACC1 form a delicate regulatory network that supports its tumorigenic role in cancers. Multiple functions of MACC1 have been discovered in many cancers. In gastric cancer(GC), MACC1 has been shown to be involved in oncogenesis and t umor progression. MACC1 overexpression adversely affects the clinical outcomes of GC patients. Regarding the mechanism of action of MACC1 in GC, studies have shown that it promotes the epithelialto-mesenchymal transition and accelerates cancer metastasis. MACC1 is involved in many hallmarks of GC in addition to metastasis. MACC1 promotes vasculogenic mimicry(VM) via TWIST1/2, and VM increases the tumor blood supply, which is necessary for tumor progression. MACC1 also facilitates GC lymphangiogenesis by upregulating extracellular secretion of VEGF-C/D, indicating that MACC1 may be an important player in GC lymphatic dissemination. Additionally, MACC1 supports GC growth under metabolic stress by enhancing the Warburg effect. In conclusion, MACC1 participates in multiple biological processes inside and outside of GC cells, making it an important mediator of the tumor microenvironment.

关键词： Metastasis-associated in colon cancer-1 Gastric cancer Epithelial-to-mesenchymal transition Vasculogenic mimicry Lymphangiogenesis Warburg effect Tumor microenvironment

Effects of Long-Term Winter Planted Green Manure on Distribution and Storage of Organic Carbon and Nitrogen in Water-Stable Aggregates of Reddish Paddy Soil Under a Double-Rice Cropping System

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Journal of Integrative Agriculture 2014年第8期13卷 1772-1781页

作者： YANG Zeng-ping ZHENG Sheng-xian NIE Jun liao Yu-lin XIE Jian Soil and Fertilizer Institute of Hunan Province Hunan Academy of Agricultural Sciences Scientifi c Observing and Experimental Station of Arable Land Conservation (Hunan) Ministry of Agriculture

In agricultural systems, maintenance of soil organic matter has long been recognized as a strategy to reduce soil degradation. Manure amendments and green manures are management practices that can increase some nutrient contents and improve soil aggregation. We investigated the effects of 28 yr of winter planted green manure on soil aggregate-size distribution and aggregateassociated carbon（C） and nitrogen（N）. The study was a randomized completed block design with three replicates. The treatments included rice-rice-fallow, rice-rice-rape, rice-rice-Chinese milk vetch and rice-rice-ryegrass. The experiment was established in 1982 on a silty light clayey paddy soil derived from Quaternary red clay（classified as Fe-Accumuli-Stagnic Anthrosols） with continuous early and late rice. In 2009, soil samples were collected（0-15 cm depth） from the field treatment plots and separated into water-stable aggregates of different sizes（i.e., 〉5, 2-5, 1-2, 0.5-1, 0.25-0.5 and 〈0.25 mm） by wet sieving. The long-term winter planted green manure significantly increased total C and N, and the formation of the 2-5-mm water-stable aggregate fraction. Compared with rice-rice-rape, rice-rice-Chinese milk vetch and rice-rice-ryegrass, the rice-rice-fallow significantly reduced 2-5-mm water-stable aggregates, with a significant redistribution of aggregates into micro-aggregates. Long-term winter planted green manure obviously improved C/N ratio and macro-aggregate-associated C and N. The highest contribution to soil fertility was from macro-aggregates of 2-5 mm in most cases.

关键词： green manure organic carbon reddish paddy soil total nitrogen water-stable aggregates

Heat Assisted Magnetic Recording with Matching Media and Recording Head Field

在线全文

学校读者我要写书评

暂无评论

Chinese Physics Letters 2010年第6期27卷 258-261页

作者： liao Jia-lin WEI Shen-Jin LI Jing JIN Qing-Yuan CHE Xiao-Dong Key Laboratory of Micro and Nano Photonic Structures (Ministry of Education) Laboratory of Advanced Materials and Department of Optical Science and Engineering Fudan University Shanghai 200433 Hitachi Global Storage Technologies San Jose CA USA

The dynamic performance of heat assisted magnetic recording （HAMR） on different media is investigated. Signal and signal-to-noise ratio enhancement are achieved in high coereivity perpendicular media with the aid of laser heating. linear recording density is increased while saturation write current is lowered. Trailing field partial erasure is observed in lower coercivity media with a ring head, which causes signal reduction with increasing write current or application of a laser. Precautions should be taken against partial erasure in overall recording system optimization of HAMR in order to achieve ultrahigh recording density.

关键词： MAGNETIC recorders & recording DATA tapes PERFORMANCE evaluation SIGNAL-to-noise ratio ELECTRIC heating SIGNAL processing

Analysis of L1-Galerkin FEMs for Time-Fractional Nonlinear Parabolic Problems

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Communications in Computational Physics 2018年第6期24卷 86-103页

作者： Dongfang Li Hong-lin liao Weiwei Sun Jilu Wang Jiwei Zhang School of Mathematics and Statistics Huazhong University of Science and TechnologyWuhan430074China Hubei Key Laboratory of Engineering Modeling and Scientific Computing Huazhong University of Science and TechnologyWuhan 430074China Department of Mathematics City University of Hong KongKowloonHong Kong Department of Mathematics Nanjing University of Aeronautics and AstronauticsNanjing211106China Department of Scientific Computing Florida StateUniversityTallahasseeFL 32306USA Beijing Computational Science Research Center Beijing 100094China.

This paper is concerned with numerical solutions of time-fractional nonlinear parabolic problems by a class of L1-Galerkin finite element *** analysis of L1 methods for time-fractional nonlinear problems is limited mainly due to the lack of a fundamental Gronwall type *** this paper,we establish such a fundamental inequality for the L1 approximation to the Caputo fractional *** terms of the Gronwall type inequality,we provide optimal error estimates of several fully discrete linearized Galerkin finite element methods for nonlinear *** theoretical results are illustrated by applying our proposed methods to the time fractional nonlinear Huxley equation and time fractional Fisher equation.

关键词： Time-fractional nonlinear parabolic problems L1-Galerkin FEMs Error estimates discrete fractional Gronwall type inequality linearized schemes

Relapse of acute lymphoblastic leukemia in the pancreas after bone marrow transplant

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

World Journal of Pediatrics 2015年第4期11卷 389-391页

作者： Guang-Xian Wang Jun-lin liao Dong Zhang Li Wen Department of Radiology Xinqiao HospitalThird Military Medical UniversityChongqing 400037China Department of Surgery Carver College of MedicineUniversity of Iowa200 Hawkins Drive1422 JCP Iowa CityIA 52242USA

Background:Relapse of acute lymphoblastic leukemia(ALL)in the pancreas is *** report a case of a 12-year-old boy who experienced a relapse of ALL in the pancreas after a bone marrow ***:Clinical data,including course of illness,laboratory results,and imaging studies are *** patient presented with acute pancreatitis,suspected to be secondary to gallstones,with ampullary *** and magnetic resonance imaging demonstrated a distended gallbladder and intra-and extra-hepatic biliary dilatation with a cutoff at the pancreatic head,but with no evidence of ***:Ultrasound-guided biopsy of the pancreas revealed ALL in the *** chemotherapy was recommended,but was declined by the *** patient died one week ***:Relapse of ALL in the pancreas is rare,but when a history of ALL is present,it should be considered in patients with pancreatic enlargement,obstructive jaundice,and pancreatitis.

关键词： acute lymphoblastic leukemia leukemic infiltration pancreas relapse

In-flight particle characterization and coating formation under low pressure plasma spray condition

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Journal of Iron and Steel Research International 2017年第3期24卷 306-312页

作者： Nan-nan Zhang Dan-yang lin Ya-li Li Yue Zhang Marie-pierre Planche Han-lin liao Christian Coddet Fu-yu Dong Department of Material Science and Engineering Shenyang University of Technology IRTES-LERMPS University of Technology of Belfort-Montbeliard

Yttria-stabilized zirconia（ YSZ） coatings were deposited by low pressure plasma spray（ LPPS） in 1.0× 10^4 Pa,1.5 × 10^4 Pa,and 2.5 × 10^4 Pa. Both in-flight particle diagnostic detected by DPV-2000 system and ANSYS-FLUENT software were used to study the connection between the parameters of flying particles and the coating formation,which might help to recognize the relationship between the operation parameters and the coatings quality. The results of simulation showed that particles in a lower spray pressure could achieve a higher velocity. The particle velocity was around 380 m/s at a distance of 35 cm from the nozzle at 1.0 × 10^4 Pa while only 300 m/s at 2.5 × 10^4 Pa in actual *** results showed that the velocity of particles increased with decreasing the spray pressure,which might enhance the flattening rate of coatings and thereby decreased the porosity. The deposited YSZ coating with the lowest porosity can be gained under 1.0 × 10^4 Pa condition.

关键词： In-flight particle detection Low pressure plasma spray Yttria-stabilized zirconia coating Flame simulation

Sijunzi Decoction Inhibits Stemness by Suppressingβ-Catenin Transcriptional Activity in Gastric Cancer Cells

在线全文

学校读者我要写书评

暂无评论

Chinese Journal of Integrative Medicine 2022年第8期28卷 702-710页

作者： LI Yue-jun liao lin-li LIU Pei TANG Ping WANG Hong PENG Qing-hua Department of Oncology the Third Affiliated Hospital of Hunan University of Chinese MedicineZhuzhou412000Hunan ProvinceChina Department of Oncology the First Affiliated Hospital of Hunan College of Traditional Chinese MedicineZhuzhou412000Hunan ProvinceChina Hunan Provincial Key Laboratory for the Prevention and Treatment of Ophthalmology and Otolaryngology Diseases with Traditional Chinese Medicine Hunan University of Chinese MedicineChangsha410208China

Objective:To investigate a previously uncharacterized function of Sijunzi Decoction(SJZD)in inhibition of gastric cancer stem cells(GCSCs).Methods:MKN74 and MKN45,two CD44 positive gastric cancer cell lines with stem cell properties were *** cells were divided into 2 *** group was treated with SJZD(1-5 mg/mL)for indicated time(48 h-14 days).The control group was treated with equal volume of phosphate buffered *** Counting Assay Kit-8 were used to measure cell *** colony formation and GCSCs marker expression were performed to determine GCSCs *** fractionation and chromatin immunoprecipitation assays were used to assess the distribution and DNA-binding activity of β-catenin after SJZD treatment,***:SJZD treatment repressed cell growth and induced apoptosis in MKN74 and MKN45 cell lines(P<0.05).Moreover,SJZD dramatically inhibited formation of spheroid colony and expression of GCSC markers in GC cells(P<0.05).Mechanistically,SJZD reduced nuclear accumulation and DNA binding activity ofβ-catenin(P<0.05),the key regulator for maintaining CSC ***:SJZD inhibits GCSCs by attenuating the transcriptional activity of β-catenin.

关键词： Sijunzi Decoction Chinese medicine gastric cancer cancer stem cells β-catenin