检索结果-南通市图书馆

Flow behavior of high-temperature flue gas in the heat transfer chamber of a pilot-scale coal-water slurry combustion furnace

在线全文

学校读者我要写书评

暂无评论

Particuology 2014年第6期12卷 114-124页

作者： Yanwei Zhang Yu Bo Yingchun wu Xuecheng wu Zhenyu Huang Junhu Zhou Kefa cen State Key Laboratory of Clean Energy Utilization Zhejiang University

The flow characteristics of high-temperature flue gas are important in the heat transfer of coal-water slurry（CWS） combustion *** flow field of a 250 kg/h vertical-type slag tap cyclone furnace was non-intrusively investigated,using two-dimensional particle-image velocimetry（2D PIV）.The method was verified using traceable fly ash particles in high-temperature flue *** flow field of the flue gas was analyzed with a time-averaged method,based on which the effects of excess air ratio and loading were *** flue gas separated by a gas separator maintained good rigidity near the furnace wall,rather than eroding the heating *** simulations validated the reliability of PIV under the actual circumstances within the *** study provides guidelines for applying 2D PIV in analyzing flue gas in thermal test boilers.

关键词： PIV cws Flow field High-temperature flue gas Slag tap cyclone furnace

Effects of microcracks on the poroelastic behaviors of a single osteon

在线全文

学校读者我要写书评

暂无评论

Science China(Physics,Mechanics & Astronomy) 2014年第11期57卷 2161-2167页

作者： wu XiaoGang WANG YanQin wu XiaoHong cen HaiPeng GUO Yuan CHEN WeiYi College of Mechanics Taiyuan University of Technology North Automatic Control Technology Research Institute

It has been suggested that microcracks do play a key role in the triggering of the bone remodeling *** order to evaluate the influence of microcracks on the poroelastic behaviors of an osteon,a finite element model is established and investigated by using the Comsol Multiphysics *** findings show that the presence of a microcrack in the osteon wall strongly modifies(enlarges)its local fluid pressure and ***,the pressure and velocity amplitudes produced in the microcracked region are larger than those of the non-cracked ***,this study can also be used for proposing a likely mechanism that bone can sense the changes of surrounding mechanical environments.

关键词： cracked permeability environments remodeling likely Figure surrounding skeleton porosity triggering

Characterization and ultraviolet-visible shielding property of samarium-cerium compounds containing Sm_(2)O_(2)S prepared by co-precipitation method

在线全文

学校读者我要写书评

暂无评论

International Journal of Minerals,Metallurgy and Materials 2022年第9期29卷 1809-1816页

作者： Yanping Li Xue Bian Xun Jin Peng cen Wenyuan wu Gaofeng Fu Key Laboratory of Ecological Metallurgy of Multi-metal Intergrown Ores of Ministry of Education Shenyang 110819China School of Metallurgy Northeastern UniversityShenyang 110819China

Since ultraviolet(UV)light,as well as blue light,which is part of visible light,is harmful to skin,samarium-cerium compounds containing Sm_(2)O_(2)S were synthesized by co-precipitation *** kind of compounds blocks not only UV light,but also blue *** minimum values of average transmittance(360-450 nm)and band gap of samarium-cerium compounds were 8.90%and 2.76 eV,respectively,which were less than 13.96%and 3.01 eV of CeO_(2).Elemental analysis(EA),X-ray diffraction(XRD),Fourier transformation infrared(FTIR),and Raman spectra determined that the samples contained Ce_(4)O_(7),Sm_(2)O_(2)S,Sm_(2)O_(3),and Sm_(2)O_(2)SO_(4).The microstructure of samples was analyzed by scanning and transmission electron microscopies(SEM and TEM).X-ray photoelectron spectrum(XPS)showed that cerium had Ce^(3+)and Ce^(4+) valence states,and oxygen was divided into lattice oxygen and oxygen vacancy,which was the direct cause of the decrease of average transmittance and band gap.

关键词： band gap co-precipitation method samarium-cerium compound ultraviolet light blue light

A new method to forecast multi-time scale load of natural gas based on augmentation data-machine learning model

在线全文

学校读者我要写书评

暂无评论

Chinese Journal of Chemical Engineering 2022年第8期35卷 166-175页

作者： Denglong Ma Ruitao wu Zekang Li Kang cen Jianmin Gao Zaoxiao Zhang School of Mechanical Engineering Xi’an Jiaotong UniversityXi’an 710049China School of Civil Engineering and Architecture Southwest Petroleum UniversityChengdu 610500China School of Chemical Engineering and Technology Xi’an Jiaotong UniversityXi’an 710049China State Key Laboratory for Manufacturing System Engineering Xi’an Jiaotong UniversityXi’an 710049China

Gas load forecasting is important for the economic and reliable operation of the city gas transmission and distribution *** this paper,a nonlinear autoregressive model(NARX)with exogenous inputs,support vector machine(SVM),Gaussian process regression(GPR)and ensemble tree model(ETREE)were used to predict and compare the gas load based on the gas load data in a certain region for past 3 *** results showed that the prediction errors for most of days were higher than 10%.Further,simulation data were generated by considering the gas load variation trend,which was then combined with historical data to form the augmentation data set to train the *** test results indicated that the prediction error of daily gas load in one year reduced to below 7%with a machine learning prediction method based on augmentation *** addition,the model based on augmentation data set still performed better than original data in predicting the monthly gas load in last year as well as daily gas load in last month and ***,the method based on augmentation data proposed in this paper is a potentially good tool to forecast natural gas load.

关键词： Natural gas Machine learning Prediction Neural network Augmentation data

Real-time Performance Evaluation of Line Topology Switched Ethernet

在线全文

学校读者我要写书评

暂无评论

International Journal of Automation and computing 2008年第4期5卷 376-380页

作者： Fan cen Tao Xing Ke-Tong wu Institute of Acoustics the Chinese Academy of SciencesBeijing 100190PRC

Recently,switched Ethernet has become an active area of research because of its wide uses in ***,its uses have various real-time constraints on data *** paper analyzes the performance of the line topology switched Ethernet as a data acquisition *** calculus theory,which has been successfully applied to assess the real-time performance of packet-switched networks,is used to analyze the *** properly describe the activity of switches,a novel approach of modeling data flows into or out of switches is *** on our model,a concisely analytical expression of the maximal end-to-end delay in line topology switched Ethernet is ***,the relative simulation results are *** results agree well with the analytical results,and thus they validate the data flow modeling techniques.

关键词： Switched Ethernet network calculus end-to-end delay line topology real-time network.

Mucinous colorectal adenocarcinoma:clinical pathology and treatment options

在线全文

学校读者我要写书评

暂无评论

Cancer Communications 2019年第1期39卷 122-134页

作者： Cong Luo Shuyi cen Guojun Ding Wei wu Department of Abdominal Oncology Zhejiang Cancer HospitalHangzhou 310022ZhejiangP.R.China School of Medicine Zhejiang UniversityHangzhou 310058ZhejiangP.R.China Department of Radiotherapy Zhejiang Cancer HospitalHangzhou 310022ZhejiangP.R.China Department of Pathology Zhejiang Cancer HospitalHangzhou 310022ZhejiangP.R.China.

Mucinous colorectal adenocarcinoma is a distinct subtype of colorectal cancer(CRC)characterized by the pres-ence of abundant extracellular mucin which accounts for at least 50%of the tumor *** colorectal adenocarcinoma is found in 10%-20%of CRC patients and occurs more commonly in female and younger ***,mucinous colorectal adenocarcinoma is more frequently located in the proximal colon and diagnosed at an advanced *** on its molecular context,mucinous colorectal adenocarcinoma is associated with the over-expression of mucin 2(MUC2)and mucin 5AC(MUC5AC)*** the same time,it shows higher mutation rates in the fundamental genes of the RAS/MAPK and PI3K/Akt/mTOR *** colorectal adenocarcinoma also shows higher rates of microsatellite instability(MSI)than non-mucinous colorectal adenocarcinoma which might correlate it with Lynch syndrome and the CpG island methylator *** prognosis of mucinous colorectal adenocarcinoma as to non-mucinous colorectal adenocarcinoma is ***,the impaired responses of mucinous colorectal adenocarcinoma to palliative or adjuvant chemotherapy warrant more studies to be performed for a specialized treatment for these *** this review,we discuss the molecular background and histopathol-ogy of mucinous colorectal adenocarcinoma,and provide an update on its prognosis and therapeutics from recent literatures.

关键词： Adenocarcinoma Mucinous carcinoma Colorectal cancer MUC2 MUC5AC Microsatellite instability Lynch syndrome Targeted molecular therapy Hyperthermic intraperitoneal chemotherapy Immunotherapy

维普期刊数据库评论

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

低碳经济引领水产品加工业发展新方向

水产学报 2011年第4期35卷 636-640页

作者：李来好邓建朝杨贤庆岑剑伟吴燕燕戚勃中国水产科学研究院南海水产研究所

阐述了目前水产品加工业的现状和存在问题,分别从加工科技含量,生产设备;高附加值产品开发,精深加工能力;产业结构、产品质量标准体系和法律法规等方面展开论述,探讨了制约我国水产品加工业低碳经济发展的因素,提出了水产品加工业向低... 详细信息

阐述了目前水产品加工业的现状和存在问题,分别从加工科技含量,生产设备;高附加值产品开发,精深加工能力;产业结构、产品质量标准体系和法律法规等方面展开论述,探讨了制约我国水产品加工业低碳经济发展的因素,提出了水产品加工业向低碳经济发展的思路和相关措施。水产品加工业的低碳经济发展道路需要依靠技术创新,提高水产品副产物的综合应用,发展水产品精深加工。另外,国家政策引导和产业结构调整等措施对水产品加工业低碳经济可持续发展也至关重要。

关键词：水产品加工低碳经济思路和对策

腹腔镜根治性全膀胱切除＋原位回肠新膀胱术对膀胱癌患者的临床疗效及并发症分析

在线全文

同方期刊数据库

学校读者我要写书评

暂无评论

国际泌尿系统杂志 2016年第4期36卷 481-484页

作者：吴岑苏仲宁伍伯聪吕联辉郑志雄林俊雄黄应福福建医科大学附属泉州第一医院泌尿外科福建泉州362000

目的比较腹腔镜根治性膀胱全切除＋原位回肠新膀胱术与开放手术的临床效果及安全性。方法选择2010年1月至2015年3月在本院行膀胱全切除＋原位回肠新膀胱术的70例患者作为研究对象，其中30例行腹腔镜下手术作为观察组，40例行开放手术作... 详细信息

目的比较腹腔镜根治性膀胱全切除＋原位回肠新膀胱术与开放手术的临床效果及安全性。方法选择2010年1月至2015年3月在本院行膀胱全切除＋原位回肠新膀胱术的70例患者作为研究对象，其中30例行腹腔镜下手术作为观察组，40例行开放手术作为对照组；对比两组患者围手术期情况、新膀胱功能及并发症发生情况。结果观察组胃肠道功能恢复时间、术后住院时间明显缩短，术中出血量明显减少，与对照组相比差异具有统计学意义（P〈0．05），手术时间则明显长于对照组（P〈0．05）；两组患者在控尿率、膀胱内压、膀胱容量、剩余尿量等方面差异无统计学意义（P〉0．05），观察组最大尿流率显著高于对照组（P〈0．05）。两组患者术后主要并发症有肠梗阻、尿瘘、尿路感染、肺部感染、排尿困难、切口感染等；观察组总并发症发生率为16．7％，显著低于对照组（37．5％），差异具有统计学意义（χ^2=4．642，P〈0．05）。结论腹腔镜根治性膀胱全切除＋原位回肠新膀胱术具有创伤小、出血少、恢复快、新膀胱功能良好、术后并发症发生率低等优点，值得临床推广。

关键词：膀胱肿瘤膀胱切除术腹腔镜尿流改道术

Optimization of Urban Multi-energy Flow Systems Considering Seasonal Peak Shaving of Natural Gas

在线全文

学校读者我要写书评

暂无评论

CSEE Journal of Power and Energy Systems 2022年第4期8卷 1183-1193页

作者： Kun Yu Zengguang cen Xingying Chen Chunxiang Liang Zheng Zhou Zhengtao Dong Lei wu College of energy and electrical engineering Hohai UniversityNanjing 211100China Electric Power Research Institute State Grid Tianjin Electric Power CompanyTianjin 300010China

In order to alleviate the shortage of natural gas supply in winter,relevant policies have been issued to promote the construction of gas peak-shaving and storage *** gas storage can transfer the supply-demand relationship of natural gas in time sequence,which has great potential in improving the economy and reliabillity of urban multi-energy flow *** this issue,this paper proposes a mid-and long-term energy optimization method for urban multi-energy flow system that considers seasonal peak shaving of natural ***,the energy supply and demand features of different energy subsystems are ***,a network model of the electricity-gas-heat multi-energy flow system is *** the time-of-use electricity price mechanism and the seasonal fluctuations of the natural gas price,a mid-and long-term energy optimization model maximizing the annual economic revenue is *** alternative direction multiplier method with Gaussian back substitution(ADMM-GBS)algorithm is used to solve the optimal dispatch ***,the proposed method is verified by employing the actual data of the demonstration zone in Yangzhong City,*** simulation results show that the proposed method is effective.

关键词： ADMM-GBS large-scale gas storage mid-and long-term energy optimization multi-energy flow system seasonal gas peak shaving