|
|
|
题名
|
作者
|
年代
|
出处
|
被引量
|
| 1 | Waste heat recovery from heavy-duty diesel engine exhaust gases by medium temperature ORC system显示文摘A medium-temperature waste-heat recovery system based on the organic Rankine cycle (ORC) is designed to recover the exhaust energy from a heavy-duty diesel engine. Analysis of the 1st law of thermodynamics for an ORC system is performed. This analysis contains two parts. The first part is an analysis with undefined heat exchangers to gain an understanding of the ORC and find out suitable organic fluid parameters for a better ORC efficiency. The second part of the analysis uses combined engine test results and two designs of heat exchangers. By comparing the two designs, an improved system of heat exchangers is described. This analysis also quantifies the effect of engine parameters on ORC system. The study concludes that the supercritical Rankine cycle is a better approach towards waste heat recovery. The ORC system is found to perform better under part-load conditions if the medium-high power condition rather than rated working point of the engine is used as the design parameter. The ORC system achieves the highest waste-heat recovery efficiency of up to 10-15% for the optimised heat ex-changer design. | WEI MingShan FANG JinLi MA ChaoChen DANISH Syed Noman | 2011 | Science China(Technological Sciences)2011，54，10： | 16 |
| 2 | The Change of the Inlet Geometry of a Centrifugal Compressor Stage and its Influence on the Compressor Performance显示文摘The impact on the compressor performance is important for designing the inlet pipe of the centrifugal compressor of a vehicle turbocharger with different inlet pipes. First, an experiment was performed to determine the compressor performance from three cases: a straight inlet pipe, a long bent inlet pipe and a short bent inlet pipe. Next, dynamic sensors were installed in key positions to collect the sign of the unsteady pressure of the centrifugal compressor. Combined with the results of numerical simulations, the total pressure distortion in the pipes, the pressure distributions on the blades and the pressure variability in the diffuser are studied in detail. The results can be summarized as follows: a bent pipe results in an inlet distortion to the compressor, which leads to performance degradation, and the effect is more apparent as the mass flow rate increases. The distortion induced by the bent inlet is not only influenced by the distance between the outlet of the bent section and the leading edge of the impeller but also by the impeller rotation. The flow fields in the centrifugal impeller and the diffuser are influenced by a coupling effect produced by the upstream inlet distortion and the downstream blocking effect from the volute tongue. If the inlet geometry is changed, the distributions and the fluctuation intensities of the static pressure on the main blade surface of the centrifugal impeller and in the diffuser are changed accordingly. | WANG Leilei YANG Ce ZHAO Ben LAO Dazhong MA Chaochen LI Du | 2013 | Journal of Thermal Science2013，22，3： | 13 |
| 3 | An analysis of esophageal cancer incidence in Cixian county from 1974 to 1996显示文摘AIM: To describe the incidence of esophageal cancer (EC)in Cixian, a county of Hebei province during 1974-1996. Weanalyzed the sex and age characteristics as well as thegeographic distribution of EC, in order to determine theimpact so that methods of preventing and controlling EC inCixian can be put in place.METHODS: Since the early 1970s, the cancer registrysystem has been established, which collects the cancerincidence in Cixian county. The malignant tumors were codedaccording to International Classification of Disease IX (ICD-9). All the data were checked and analyzed using EPIINFO.RESULTS: The trend of the incidence rate of EC from 1974to 1996 had declined, (229.9/100 000 vs 178.5/100 000, Oddsratio= 1.47, 95 % CI: 1.32~1.63, X2=52.89. trend X2=26.54,P<0.001). The incidence rate of males declined significantly(281.81/100 000 vs 157.96/100 000, Odds ratio=1.61, 95 %CI: 1.41~1.84, X2=47.85. Trend X2=44.86, P<0.001),whereas, the females remained steady (157.96/100 000 vs133.41/100 000, odds ratio=1.28, 95 % CI:1.17~1.49,X2=9.26. trend X2=2.69, P>0.05). Male average annualincidence rate was 142.80/100 000 and the female's was95.18/100 000. The sex ratio (males to females) was 1.50:1.The incidence rate was increasing along with the age. As tothe geographic distribution, the incidence rate in mountainousareas and hilly areas showed a significantly declining trend(mountainous areas, trend X2=149.93, P<0.001; hilly areas,trend X2=42.70, P<0.001). The incidence rate of EC in plainareas had increased (trend X2=22.39, P<0.001).CONCLUSION: The incidence rate of EC in Cixian countyshows a trend and has declined after two decades, especiallyin mountainous area. But compared to other regions in theworld, Cixian county still had a high incidence rate of EC. | Yu-TongHe JunHou Cui-YunQiao Zhi-FengChen Guo-HuiSong Shao-SenLi Fan-ShuMeng Hong-XinJin ChaoChen | 2003 | World Journal of Gastroenterology2003，9，2： | 11 |
| 4 | A review of fundamental factors affecting diesel PM oxidation behaviors显示文摘Diesel particulate matter(DPF) is usually employed to meet the stringent regulations on particulate matter(PM) emissions for diesel engine. To resolve the DPF regeneration problem, comprehensive information about the factors influencing PM oxidation behaviors must be understood. Large amounts of factors related to PM oxidation activity have been investigated, however, some relations are still ambiguous. This paper reviews the factors related to PM oxidation activity that the factors are divided into the engine-correlated and engine-uncorrelated factors. The methods with both advantages and disadvantages to test the oxidation behaviors are introduced. The microstructure and ingredient being fundamental factors affecting PM oxidation behaviors are as the principle line to correlate PM oxidation behaviors and engine-correlated factors. The relations of engine-correlated factors with oxidation behaviors are obtained though advanced technologies that are mutual complementation. The engine-uncorrelated factors are also reviewed that these factors are vital to oxidation activity changes. Multiple-factor analysis rather than single-factor analysis should be developed to make the oxidation behaviors of diesel PM more clear. | GAO JianBing MA ChaoChen XING ShiKai SUN LiWei HUANG LiYong | 2018 | Science China(Technological Sciences)2018，61，3： | 8 |
| 5 | Seasonal variations of soil bacterial communities in Suaeda wetland of Shuangtaizi River estuary, Northeast China显示文摘Estuarine wetland is the transitional interface linking terrestrial with marine ecosystems,and wetland microbes are crucial to the biogeochemical cycles of nutrients.The soil samples were collected in four seasons(spring,S1;summer,S2;autumn,S3;and winter,S4)from Suaeda wetland of Shuangtaizi River estuary,Northeast China,and the variations of bacterial community were evaluated by high-throughput sequencing.Soil properties presented a significant seasonal change,including p H,carbon(C)and total nitrogen(TN),and the microbial diversity,richness and structure also differed with seasons.Canonical correspondence analysis(CCA)and Mantel tests implied that soil p H,C and TN were the key factors structuring the microbial community.Gillisia(belonging to Bacteroidetes)and Woeseia(affiliating with Gammaproteobacteria)were the two primary components in the rhizosphere soils,displaying opposite variations with seasons.Based on PICRUSt(Phylogenetic Investigation of Communities by Reconstruction of Unobserved States)prediction,the xenobiotics biodegradation related genes exhibited a seasonal decline,while the majority of biomarker genes involved in nitrogen cycle showed an ascending trend.These findings could advance the understanding of rhizosphere microbiota of Suaeda in estuarine wetland. | Xuwang Zhang Zhe Ji Yating Shao Chaochen Guo Hao Zhou Lifen Liu Yuanyuan Qu | 2020 | Journal of Environmental Sciences2020，32，11： | 4 |
| 6 | Fabrication of PVDF nanofibrous hydrophobic composite membranes reinforced with fabric substrates via electrospinning for membrane distillation desalination显示文摘To improve the mechanical properties of the electrospun nanofibrous membrane, the nonwoven fabrics and spacer fabrics were employed as support substrates to fabricate polyvinylidene fluoride(PVDF) nanofibrous composite membranes. The influences of the substrate on membrane morphology, hydrophobicity, pore size and pore size distribution,porosity, mechanical strength and permeability were comprehensive evaluated. The electrospun composite membranes had a three dimension bead-fiber interconnected open structure and a rough membrane surface. The membrane surface presented a multilevel re-entrant structure and all the water contact angles were above 140°. In contrast with the pure PVDF nanofibrous membrane, the stress at break and the elastic modulus of the composite membranes increased by 4.5–16 times and 17.5–37 times, respectively. Since the spacer fabrics had less resistance to mass transfer, the membranes composited with spacer fabrics exhibited greater permeate fluxes compared with the composite membranes with the nonwoven fabrics as substrates.During the membrane distillation test, the highest permeate flux was up to 49.3 kg/m^2/hr at the feed temperature of 80°C. The long-time and repeat operation of membrane distillation desalination indicated the fabricated membrane with a good resistance to scaling and wetting.The results suggested the potential of the electrospun composite membrane for membrane distillation application. | Kuiling Li Deyin Hou Chaochen Fu Kai Wang Jun Wang | 2019 | Journal of Environmental Sciences2019，31，1： | 4 |
| 7 | Functional polymorphisms of circadian positive feedback regulation genes and clinical outcome of Chinese patients with resected colorectal cancer显示文摘 | FengZhou XianliHe HanqiangLiu YongZhu TianboJin ChaoChen FalinQu YunmingLi GuoqiangBao ZhinanChen JinliangXing | 2012 | Cancer2012，，4： | 3 |
| 8 | Forced Responses on a Radial Turbine with Nozzle Guide Vanes显示文摘Radial turbines with nozzle guide vanes are widely used in various size turbochargers.However,due to the interferences with guide vanes,the blades of impellers are exposed to intense unsteady aerodynamic excitations,which cause blade vibrations and lead to high cycle failures(HCF).Moreover,the harmonic resonance in some frequency regions are unavoidable due to the wide operation conditions.Aiming to achieve a detail insight into vibration characteristics of radial flow turbine,a numerical method based on fluid structure interaction(FSI) is presented.Firstly,the unsteady aerodynamic loads are determined by computational fluid dynamics(CFD).And the fluctuating pressures are transformed from time domain to frequency domain by fast Fourier-transform(FFT).Then,the entire rotor model is adopted to analyze frequencies and mode shapes considering mistuning in finite element(FE) method.Meanwhile,harmonic analyses,applying the pressure fluctuation from CFD,are conducted to investigate the impeller vibration behavior and blade forced response in frequency domain.The prediction of the vibration dynamic stress shows acceptable agreement to the blade actual damage in consistent tendency. | LIU Yixiong YANG Ce MA Chaochen LAO DaZhong | 2014 | Journal of Thermal Science2014，23，2： | 3 |
| 9 | Histone H3 lysine 4 monomethylation modulates long- range chromatin interactions at enhancers显示文摘在 enhancers 和倡导者之间的远程的染色质相互作用为在哺乳动物和另外的 metazoans 的许多发展地控制的基因的抄写是必要的。当前,把远侧的 enhancers 连接到他们的特定的目标倡导者的准确机制尚待充分被阐明。这里,我们证明 4 monomethylation (H3K4me1 )(MLL3/4 ) 和 histone methyltransferases MLL3 和 MLL4 玩的提高特定的 histone H3 离氨酸在这个过程的一个活跃角色。我们在区分老鼠表明那胚胎的干细胞,在 enhancers 的 H3K4me1 的 MLL3/4-dependent 免职与染色质相互作用的增加的层次相关,而这 histone 修正的损失在区别期间在基因激活导致染色质相互作用和缺点的减少的层次。H3K4me1 便于 Cohesin 建筑群的招募,染色质组织的一个已知的管理者到在 vitro 并且在 vivo 的染色质,提供潜在的机制让 MLL3/4 支持在 enhancers 和倡导者之间的染色质相互作用。一起拿,我们的结果在在哺乳动物的房间在 enhancers 安排远程的染色质相互作用为 MLL3/4-dependent H3K4me1 支持一个角色。 | Jian Yan Shi-An A Chen Andrea Local Tristin Liu Yunjiang Qiu Kristel M Dorighi Sebastian Preissl Chloe M Rivera Chaochen Wang Zhen Ye Kai Ge Ming Hu Joanna Wysocka Bing Ren | 2018 | Cell Research2018，28，2： | 2 |
| 10 | Epidemiologic psychiatric studies on post‐disaster impact among Chi‐Chi earthquake survivors in Yu‐Chi, Taiwan显示文摘 | FRANK HUANG‐CHIHCHOU HUNG‐CHIWU PESUSCHOU CHAO‐YUEHSU KUAN‐YITSAI SHIN‐SHINCHAO MING‐CHAOCHEN TOM TUNG‐PINGSU WEN‐JUNGSUN WEN‐CHENOU‐YANG | 2007 | Psychiatry and Clinical Neurosciences2007，，4： | 1 |
| 11 | for improving diesel engine Development of Turbocharge matching performance 显示文摘 | Zhang Hong Ma Chaochen | 2002 | Journal of Beijing of technology2002，，14： | 1 |
| 12 | A computer-aided geometric approach to inverse kinematics显示文摘 | Fu Hougguang Yanglu and Zhou Chaochen | 1998 | Journal of Robotic systems1998，15，3： | 1 |
| 13 | Experi- mental study on the nitrogen dioxide and particulate matter emissions from diesel engine retrofitted with particulate oxi- dation catalyst显示文摘 | FENG Xiangyu GE Yunshan MA Chaochen | 2014 | Science of the Total Environment2014，472，： | 1 |
| 14 | Con-stituents of leaves of PheUodendron japonicum MAXIM,and their antioxidant activity 显示文摘 | Chiu Chih-Yang LI ChiaYing Chiu ChaoChen* | 2005 | Chemical and Pharma-ceutical Bulletin2005，53，9： | 1 |
| 15 | Investigation on the Forced Response of a Radial Turbine under Aerodynamic Excitations显示文摘Rotor blades in a radial turbine with nozzle guide vanes typically experience harmonic aerodynamic excitations due to the rotor stator interaction. Dynamic stresses induced by the harmonic excitations can result in high cycle fatigue(HCF) of the blades. A reliable prediction method for forced response issue is essential to avoid the HCF problem. In this work, the forced response mechanisms were investigated based on a fluid structure interaction(FSI) method. Aerodynamic excitations were obtained by three-dimensional unsteady computational fluid dynamics(CFD) simulation with phase shifted periodic boundary conditions. The first two harmonic pressures were determined as the primary components of the excitation and applied to finite element(FE) model to conduct the computational structural dynamics(CSD) simulation. The computed results from the harmonic forced response analysis show good agreement with the predictions of Singh's advanced frequency evaluation(SAFE) diagram. Moreover, the mode superposition method used in FE simulation offers an efficient way to provide quantitative assessments of mode response levels and resonant strength. | MA Chaochen HUANG Zhi QI Mingxu | 2016 | Journal of Thermal Science2016，25，2： | 1 |
| 16 | Feasibility Study ofSelf-Powered Magnetorheological Damper Systems显示文摘 | ChaoChen Wei-Hsin Liao | 2012 | Active and Passive Smart Structures and IntegratedSystems2012，，： | 1 |
| 17 | Experiment and surge analysis of centrifugal two-stage turbocharging system 显示文摘 | HE Yituan MA Chaochen | 2008 | Frontiers of Mechanical Engineering in China2008，3，4： | 1 |
| 18 | Development of Mixed-flow Tur-bine for H1F Turbocharger显示文摘 | MA Chaochen SHI Xin | 2000 | Journal of Beijing Institute of Technology2000，9，4： | 1 |
| 19 | Research on the critical speed of a mixed-flow turbocharger with hybrid ceramic ball bearing显示文摘 | Huang Ruo Ge Xinbin Ma Chaochen | 2009 | Journal of Beijing Institute of Technology:English Edition2009，18，3： | 1 |
| 20 | Finite element analysis on crack tip' s SIF of a turbocharger impeller显示文摘 | ZHAO Junsheng MA Chaochen | 2005 | Journal of Beijing Institute of Technology2005，15，： | 1 |
您所在的机构暂未开通此部分的功能，请联系管理员