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| 1 | Drag prediction method of powered-on civil aircraft based on thrust drag bookkeeping显示文摘A drag prediction method based on thrust drag bookkeeping(TDB) is introduced for civil jet propulsion/airframe integration performance analysis.The method is derived from the control volume theory of a powered-on nacelle.Key problem of the TDB is identified to be accurate prediction of velocity coefficient of the powered-on nacelle.Accuracy of CFD solver is validated by test cases of the first AIAA Propulsion Aerodynamics Workshop.Then the TDB method is applied to thrust and drag decomposing of a realistic aircraft.A linear relation between the computations assumed free stream Mach number and the velocity coefficient result is revealed.The thrust losses caused by nozzle internal drag and pylon scrubbing are obtained by the isolated nacelle and mapped on to the in-flight whole configuration analysis.Effects of the powered-on condition are investigated by comparing through-flow configuration with powered-on configuration.The variance on aerodynamic coefficients and pressure distribution is numerically studied. | Zhang Yufei Chen Haixin Fu Song Zhang Miao Zhang Meihong | 2015 | Chinese Journal of Aeronautics2015，28，4： | 11 |
| 2 | Prediction of separation flows around a 6:1 prolate spheroid using RANS/LES hybrid approaches显示文摘这篇论文论述混合平均 Reynolds 的 Navier 司烧(RANS ) 并且为在在 6:1 附近的攻击的高角度的分开的流动的 large-eddy-simulation (LES ) 方法延长球状体。在这个工作学习的 RANS/LES 混合方法基于 Spalart Allmaras ( S A )包括分开的旋涡模拟( DES ), Menter 的 k ω
shear-stress-transport ( SST )和有弱非线性的旋涡粘性明确的表达的 k ω
(威尔科克斯Durbin+,WD+)模型和 zonal-RANS/LES 方法基于 SST 和WD+模型。从到在核心流动区域的 LES 的墙附近的 RANS 的开关通过为带的混合方法混合功能的一个流动依赖者的实现是光滑的。所有混合方法被设计为依附的流动有一个 RANS 模式并且为分开的流动有 LES 行为。这篇论文的主要目的是使用混合方法因为高级雷纳兹数字在延长球状体附近分开了流动在高发生。有第四顺序的人工的粘性的一个第四顺序的中央计划被申请空间 differencing。充分含蓄更低上面对称 -- 有假时间亚重复的高斯 Seidel 作为时间的区别被拿。有可得到的大小的比较为速度的压力分发,皮肤磨擦,和侧面被执行,等等。对实验的合理同意,为格子和基本骚乱上的效果的财务当模特儿,为分离流动被获得。 | Zhixiang Xiao Yufei Zhang Jingbo Huang Haixin Chen Song Fu School of Aerospace Engineering,Tsinghua University,Beijing 100084,China | 2007 | Acta Mechanica Sinica2007，23，4： | 10 |
| 3 | An analysis of the Circumferential Grooves Casing Treatment for transonic compressor flow显示文摘The stall mechanism of the NASA Rotor 37 is investigated through the analysis of the critical flow structures near the stall under the transonic condition. The performance of the rotor with Circumferential Grooves Casing Treatment (CGCT) is also studied based on the Reynolds-Averaging Navier-Stokes approach. The study finds that stall margin improvement can be achieved without significant penalty on the efficiency for the two CGCT configurations applied. The effects of circumferential grooves on the critical flow structures are studied through the analysis of the tip leakage mass and momentum transport that further re-veal the CGCT mechanism. | HUANG XuDong,CHEN HaiXin,SHI Ke & FU Song School of Aerospace,Tsinghua University,Beijing 100084,China | 2010 | Science China(Physics,Mechanics & Astronomy)2010，53，2： | 7 |
| 4 | A Karman-Vortex Generator for passive separation control in a conical diffuser显示文摘Flow separation in a conical diffuser with large divergence angle(29.14°) and large area ratio(3.533) is eliminated by a novel passive flow control device called Karman-Vortex Generator(KVG).The effect of the KVG is verified and investigated by the URANS,DES and DDES methods based on the SST model.CFD results show that the performance coefficient of the diffuser can be doubled by the KVG,and the total pressure recovery coefficient can be improved by about 1.2%.DES and DDES results show that the KVG can introduce a Karman-vortex street frequency in the diffuser.This frequency decays rapidly,and could not be detected in the ending plane of the expansion section.Different KVG configurations with different locations and dimensions are numerically simulated and compared.Some suggestions are provided. | ZHANG YuFei CHEN HaiXin FU Song | 2012 | Science China(Physics,Mechanics & Astronomy)2012，55，5： | 7 |
| 5 | A MyD88-JAK1-STAT1 complex directly induces SOCS-1 expression in macrophages infected with Group A Streptococcus显示文摘一些病原体能使用表明 1 的 cytokine (SOCS-1 ) 的主人 suppressor,一个重要否定反馈的分子,有免疫力的避免的主要模式。这里,我们发现那个组 A 链球菌(气体) 能够在 RAW264.7 和 BMDM 巨噬细胞导致 SOCS-1 表示。IFN-β在由气体跟随 cytokine 表示的正式就职的巨噬细胞在导致气体的 SOCS-1 表示起一个作用,代表 SOCS-1 表示的古典小径。然而,当感染气体的房间与 anti-IFN-β 被孵化时,气体也导致了 STAT1 激活和 SOCS-1 表示;在这研究的 monoclonal 抗体。而且,在把 TLR4 −/− BMDM 巨噬细胞与作比较之上野类型(WT ) 房间,我们发现 TLR4 也在 SOCS-1 的正式就职起一个必要作用。MyD88,是为 TLR4 的适配器蛋白质,由与 Janus kinase 形成建筑群贡献 STAT1 激活和 phosphorylation 1 (JAK1 ) 并且信号变换器和在巨噬细胞的抄写 1 的使活跃之物(STAT1 ) 。而 JAK1 的表示是未受影响的, STAT1 的刺激气体的表示严重地在 MyD88 −/− 巨噬细胞被损害,建议 MyD88 涉及 STAT1 表示和 phosphorylation。一起,这些数据除了 IFN-β 表明了那;发信号并且 MyD88 复杂形成, JAK1 和 STAT1 在一条新奇小径行动直接在感染气体的巨噬细胞导致 SOCS-1 表示,它可能对快速的细菌的感染更导致。 | Jinghua Wu Cuiqing Ma Haixin Wang Shuhui Wu Gao Xue Xinli Shi Zhang Song Lin Wei | 2015 | Cellular & Molecular Immunology2015，12，3： | 5 |
| 6 | An iterative data-driven turbulence modeling framework based on Reynolds stress representation显示文摘Data-driven turbulence modeling studies have reached such a stage that the basic framework is settled,but several essential issues remain that strongly affect the performance.Two problems are studied in the current research:(1)the processing of the Reynolds stress tensor and(2)the coupling method between the machine learning model and flow solver.For the Reynolds stress processing issue,we perform the theoretical derivation to extend the relevant tensor arguments of Reynolds stress.Then,the tensor representation theorem is employed to give the complete irreducible invariants and integrity basis.An adaptive regularization term is employed to enhance the representation performance.For the coupling issue,an iterative coupling framework with consistent convergence is proposed and then applied to a canonical separated flow.The results have high consistency with the direct numerical simulation true values,which proves the validity of the current approach. | Yuhui Yin Zhi Shen Yufei Zhang Haixin Chena Song Fu | 2022 | Theoretical & Applied Mechanics Letters2022，12，5： | 1 |
| 7 | Numerical investigation of the casing treatment mechanism with a single circumferential groove显示文摘The paper investigates the effect of a single circumferential groove casing treatment(CGCT) on a transonic compressor rotor numerically.In particular,the effect of the groove at different axial locations on the flow field is studied in detail and stall margin improvement is also discussed.The present results show that the groove close to the leading edge plays a crucial role in stabilizing the near stall flow structures and,hence,improves the stall margin.The groove at the mid-chord-section of the blade can help exchange and transfer momentums between different directions,and suppress the flow unsteadiness,leading to increased efficiency in rotor performance and extended operation range.The groove located near the blade trailing edge has limited effects on stall margin improvement and may cause additional penalty in efficiency.Through comparison with the recent work on CGCT,some common flow physics can be observed. | SHI Ke CHEN HaiXin FU Song | 2013 | Science China(Physics,Mechanics & Astronomy)2013，56，2： | 1 |
| 8 | Numerical investigation of fire smoke transport in the tsinghua university sports center ts- inghua显示文摘 | CHEN Jianguo CHEN Haixin FU Song | 2005 | Science and Technology2005，5，： | 1 |
| 9 | Navier-Stokes simulations for transport aircraft wing/body high-lift configurations 显示文摘 | HAIXIN CHEN SONG FU FENGWEI LI | 2003 | Journal of aircraft2003，40，10： | 1 |
| 10 | Analysis of Lymph Node Metastases of 1,526 Cases with Thoracic Esophageal and Cardiac Carcinomas: A Random Sampling Report froni the Fourth Hospital of Hebei Medical University from 1996 to 2004显示文摘OBJECTIVE To summarize the regular pattern and state oflymph node metastasis of patients with esophageal and cardiaccarcinomas,so as to analyze factors influencing lymph nodemetastasis.METHODS Clinical data collected from 1,526 thoracicesophageal and cardiac carcinoma patients who were admitted inthe Fourth Hospital of Hebei Medical University during a periodfrom January 1996 to December 2004,were randomly selectedand an Access Database of the patient's information was set up.Eight clinico-pathologic factors,including the patient's age,tumorlocation and size,pathological classification,the depth of tumorinvasion,vascular tumor embolus (VTE),the state of surroundingorgan encroachment and the status of tumor residues,wereidentified.A correlation between these factors and metastases wasstatistically analyzed using SPSS13.0 software.RESULTS Lymph node metastatic sites from esophagealcarcinomas included the thoracic and abdominal cavity.Lymphnode metastasis from the superior esophageal carcinomasmainly occurred in the neck and thoracic cavity.There was atwo-way lymph node metastasis in the patients with the middleesophageal carcinoma.The inferior esophageal carcinomas mainlymetastasized to the paraesophageal,paragastric cardia,and leftgastric artery lymph nodes.The rate and degree of the metastasisfrom the inferior esophageal carcinomas were significantly highercompared to those of the superior and the middle esophagealcarcinomas (P<0.0125).The degree of abdominal lymph node metastasis fromcarcinomas of the gastric cardia was significantly higher comparedwith that of esophageal carcinomas.In the group with carcinomaof the gastric cardia,the rate and degree of the lymph nodemetastases in the paragastric cardia and left gastric artery weresignificantly higher compared to the group with esophagealcarcinoma (P<0.05).Paraesophageal lymph node metastasis fromcarcinomas of the gastric cardia in the thoracic cavity frequentlyoccurred,too,and the degree of the metastasis was similar to thatof esophageal carcinoma.There was no significant difference inthe rate and degree of the paraesophageal lymph-node metastasisbetween the group with carcinoma of the gastric cardia comparedto those with esophageal carcinoma (P>0.05).Multifactoriallogistic regression analysis showed that the tumor size,depth oftumor encroachment,VTE,and tumor residues could all bringabout obvious impact on lymph-node metastases (P<0.05).CONCLUSION Lymph node metastasis from superioresophageal carcinomas mainly occurs in the neck and thoraciccavity.The middle esophageal carcinomas presented a two-waylymph-node metastasis (both the upwards and the downwards),and the lymph node metastasis from inferior esophagealcarcinomas mainly occurred in the thoracic and abdominal cavities.The metastases of carcinoma of the gastriccardia were most commonly found in the abdominalcavity,with frequent paraesophageal lymph-nodemetastasis.The sufficient attention should be paidto neck lymph node clearance in cases of esophagealcarcinoma.What is of the greatest concern is theclearance of the left gastric artery lymph nodes,andalso in cases of gastric cardia carcinoma,clearance,the paraesophageal lymph nodes.With an increasein the tumor size and depth of tumor encroachment,and occurrence of VTE and tumor residual cells,therisk of lymph node metastasis is significantly raised (P<0.05). | Wei Liu Xishan Hao Yong Chen Haixin Li Shijie Wang Peizhong Wang Hng Jin Liyun Guan Qian Fan Linan Song Yumin Ping Xianli Meng Rui Wang Junfeng Liu Xiaoling Wang | 2008 | Chinese Journal of Clinical Oncology2008，5，6： | 1 |
| 11 | Bif-1 is overexpressed in hepatocellular carcinoma and correlates withshortened patient survival显示文摘 | Rengen Fan Yufeng Miao Xiangxiang Shan Haixin Qian Changzhi Song Guangzhou Wu Yan Chen Wenzhang Zha | 2012 | Oncology Letters2012，，4： | 1 |
| 12 | Overview of Ultra-Wideband Transceivers——System Architectures and Applications显示文摘The Ultra-WideBand(UWB) technique, which offers good energy efficiency, flexible data rate, and high ranging accuracy, has recently been recognized as a revived wireless technology for short distance communication.This paper presents a brief overview of two UWB techniques, covering Impulse-Radio UWB(IR-UWB) and FrequencyModulation UWB(FM-UWB) methods. The link margin enhancement technique, Very-WideBand(VWB), and power consumption reducing technique, chirp UWB, are also introduced. Then, several potential applications of IR-UWB with transceiver architectures are addressed, including high data rate proximity communication and secure wireless connectivity. With fine-ranging and energy-efficient communication features, the UWB wireless technology is highly promising for secure mobile Internet of Things(IoT) applications. | Bowen Wang Haixin Song Woogeun Rhee Zhihua Wang | 2022 | Tsinghua Science and Technology2022，27，3： | 1 |
| 13 | Analysis of Clinicopathologic Features of Esophageal Carcinoma Patients Undergoing Surgery-a Report of 4,329 Cases显示文摘OBJECTIVE To investigate the clinicopathological features of esophageal carcinoma(EC)patients,and to analyze epidemiologic characteristics and the current situation of esophageal cancioma in the southern area of Hebei Province. METHODS A total of 4329 patients with esophageal cancinoma, undergoing surgery in the Fourth Hospital of Hebei Medical University during a period from January 1996 to December 2005, were selected.Collection and statistical analysis of the pathologic data were performed using a SAS 6.0 so ware package. RESULTS Over the past ten years,there has been a tendency for an increase in the mean age of EC onset(P<0.05),a downtrend in the percentage of squamous cancer(SqCa)(P<0.05)and an uptrend in the frequency of small cell carcinoma(P<0.05).In clinical stages,there was a drop in the percentage of Stage-II squamous EC patients(P<0.05),and an increase in that of Stage- IV patients(P<0.05).There were statistical differences in sex,age, pathologic types,depth of infiltration,ratio of stages and lymph node metastasis,etc.among the superior,middle and inferior segments of the EC diseased region(P<0.05). CONCLUSION It was relatively late for the EC patients from this area to see a doctor,resulting in a drop in the ratio of SqCa and an ascensus in that of small cell cancer.However,due to a low incidence of adenocarcinoma,no obvious ascending tendency was found in the frequency of this carcinoma over the past ten years. | Wei Liu Xishan Hao Ying Jin Haixin Li Linan Song Shijie Wang Peizhong Wang Yong Chen Qian Fan Liyun Guan Yumin Ping Xianli Meng Rui Wang Junfeng Liu Xiaoling Wang | 2008 | Chinese Journal of Clinical Oncology2008，5，2： | 0 |
| 14 | An accurate distributed scheme for detection of prefix interception显示文摘Previous research in interdomain routing security has often focused on prefix hijacking. However,several prefix interception events have happened lately, which poses a new security challenge to the interdomain routing system. Compared to prefix hijacking, prefix interception is much harder to detect, as it avoids black hole by forwarding the hijacked traffic back to the victim. In this paper, we present a novel method to detect prefix interception. Our approach exploits a key observation about prefix interception: during a prefix interception event, the attacker detours the intercepted traffic through its network, which turns it into a new important'transit point' for access to the victim. By collecting data plane information to detect the emerging 'transit point' and using control plane information to verify it, our scheme can identify prefix interception in real time.The results of Internet experiments and Internet-scale simulations show that our method is accurate with low false alarm rate(0.28%) and false negative rate(2.26%). | Song LI Haixin DUAN Zhiliang WANG Jinjin LIANG Xing LI | 2016 | Science China(Information Sciences)2016，59，5： | 0 |
| 15 | Two typical phenomena from the numerical simulation of fire and smoke transport in a gymnasium fire显示文摘Navier-Stokes equations are solved to simulate a gymnasium fire. The equations are simpli- fied by weakly compressible low Mach number as- sumption. Turbulence effect is simulated using Smagorinsky large eddy simulation (LES) model. The mixture fraction combustion model is adopted to simulate the burning process. With the analysis of computed velocity and temperature field, two impor- tant phenomena, named door effect and smoke plug-holing, are found to be responsible for the dete- rioration of smoke exhaust efficiency when natural ventilation or forced ventilation is present. Some ex- planations are made to elucidate these effects’ mechanism. An improved design of smoke ventilation system is suggested. | CHEN Jianguo CHEN Haixin FU Song | 2006 | Chinese Science Bulletin2006，51，12： | 0 |
| 16 | Recent Advances in the Understanding of the Surface Reconstruction of Oxygen Evolution Electrocatalysts and Materials Development显示文摘The electrochemical oxygen evolution reaction(OER)plays an important role in many clean electrochemical energy storage and conversion systems,such as electrochemical water splitting,rechargeable metal–air batteries,and electrochemical CO_(2) reduction.However,the OER involves a complex four-electron process and suffers from intrinsically sluggish kinetics,which greatly impairs the efficiency of electrochemical systems.In addition,state-of-the-art RuO2-based OER electrocatalysts are too expensive and scarce for practical applications.The development of highly active,cost-effective,and durable electrocatalysts that can improve OER performance(activity and durability)is of significant importance in realizing the widespread application of these advanced technologies.To date,considerable progress has been made in the development of alternative,noble metal-free OER electrocatalysts.Among these alternative catalysts,transition metal compounds have received particular attention and have shown activities comparable to or even higher than those of their precious metal counterparts.In contrast to many other electrocatalysts,such as carbon-based materials,transition metal compounds often exhibit a surface reconstruction phenomenon that is accompanied by the transformation of valence states during electrochemical OER processes.This surface reconstruction results in changes to the true active sites and an improvement or reduction in OER catalytic performance.Therefore,understanding the self-reconstruction process and precisely identifying the true active sites on electrocatalyst surfaces will help us to finely tune the properties and activities of OER catalysts.This review provides a comprehensive summary of recent progress made in understanding the surface reconstruction phenomena of various transition metal-based OER electrocatalysts,focusing on uncovering the correlations among structure,surface reconstruction and intrinsic activity.Recent advances in OER electrocatalysts that exhibit a surface self-reconstruction capability are also discussed.We identify possible challenges and perspectives for the development of OER electrocatalysts based on surface reconstruction.We hope this review will provide readers with some guidance on the rational design of catalysts for various electrochemical reactions. | Junwei Chen Haixin Chen Tongwen Yu Ruchun Li Yi Wang Zongping Shao Shuqin Song | 2021 | Electrochemical Energy Reviews2021，4，3： | 0 |
| 17 | Analysis of Prognostic Factors of Esophageal and Gastric Cardiac Carcinoma Patients after Radical Surgery Using Cox Proportional Hazard Model-A Random Sampling Study from the Fourth Hospital of Hebei Medical University during the Period of 1996-2004显示文摘OBJECTIVE To retrospectively analyze clinical data of patientsfrom our hospital who underwent radical surgery for esophagealcarcinoma and for adenocarcinoma of the gastric cardia,as well asto investigate prognostic factors affecting the long-term survival ofthe patients.METHODS Data from the patients eligible for our study,admitted to the 4th Hospital of Hebei Medical University fromJanuary 1996 to December 2004,were randomized,and 12distinctive clinicopathologic factors influencing the survival rateof those who underwent radical surgery for esophageal carcinomaor carcinoma of the gastric cardia were collected.Univariate andmultivariate analysis of these individual variables were performedusing the Cox proportional hazard model.RESULTS It was shown by univariate analysis that age,tumorsize,pathologic type,lymph node status,TNM staging,depthof infiltration and encroachment into local organs,etc.,were thefactors that markedly influenced the prognosis of patients(P<0.01).Multivariate analysis showed that pathologic type,numberof the lymph node metastases,involvement of local organs,andTNM staging were independent prognostic factors(P<0.05).CONCLUSION The independent factors influencing theprognosis of patients with esophageal cancer and carcinoma ofthe gastric cardia include pathologic type,number of lymph nodemetastases,involvement of local organs and TNM staging.Themain prognostic factors affecting the patient's survival are patientage,tumor size and depth of infiltration.In addition,patients withinvolvement of the local organs have a worse prognosis,and theyshould be closely followed up. | Wei Liu Xishan Hao Qian Fan Peizhong Wang Haixin Li Linan Song Shijie Wang Ying Jin Yong Chen Liyun Guan Yumin Ping Xianli Meng Rui Wang Junfeng Liu Xiaoling Wang | 2009 | Clinical oncology and cancer resexreh2009，6，4： | 0 |
| 18 | Solid-state NMR studies on the organic matrix of bone显示文摘Bone is a hierarchical architecture that consists of both inorganic and organic components.The organic components,including collagen and numerous non-collagenous biomolecules,are crucial for maintaining the mechanical strength and physiological functions of bone.The native structures of organic components and especially the mutual interactions between different components are important questions to be addressed.Among different analytical techniques,solid-state nuclear magnetic resonance(SSNMR)spectroscopy is a powerful tool to reveal the chemical and interactional information at an atomic level.Recent advancements of SSNMR technology and experimental protocols have brought great advances in understanding the molecular details in native bones.In this review,we summarize the progresses on the SSNMR studies of various organic components in the bone matrix.In the first part,we review the studies on collagen from four different aspects:(1)waterassociated molecular dynamics;(2)the intrahelical/interhelical interactions in collagen residues;(3)the interactions between collagen and citrate;and(4)the cross-linking between collagen and inorganic surface.In the second part,we review the studies on the non-protein biomolecules including sugar species,citrate,lipids,and nucleic acids.In the end,we propose an outlook of future directions for SSNMR investigations on bones. | Hua-Dong Xue Yu Yin Tian He Haixin Song Jianhua Li Xueqian Kong | 2023 | Nano Research2023，16，2： | 0 |
| 19 | Stability of flow between rotating cylinders with axial buoyancy effect显示文摘The linear stability of a fluid confined between two coaxial cylinders rotating independently with axial buoyancy induced flow is examined. Buoyancy is included through the Boussinesq approximation. The numerical investigation is restricted to radius ratio 0.5 at Prandtl number 0.709 with co-rotation situation. The outer rotating cylinder’s Couette flow Reynolds number is restricted to 200. Zeroth-order discontinuities are found in the critical surface, which are explained as the result of the competition between the centrifugal and axial buoyancy induced shear instability mechanisms. Due to the competition, the neutral stability curves develop islands of instability, which considerably lower the instability threshold. Specific and robust numerical methods to handle these geometrical complexities are developed. | CHEN Jianguo CHEN Haixin ZHANG Guanghua FU Song | 2006 | Science China(Physics,Mechanics & Astronomy)2006，49，5： | 0 |
| 20 | The effects of vortex breakdown on the static rolling aerodynamics of finned slender body显示文摘The static rolling aerodynamics of a finned slender body is numerically studied in this paper.Simulation results show a nonlinear uprising of the rolling moment when the angle of attack is greater than 20°in subsonic flows.Asymmetric vortex break down phenomenon on the'horizontal'rudders is found to be responsible for this phenomenon.By introducing the geometric-equivalent angle of attack and geometric-equivalent sweep angle,the cause of the nonlinear rolling moment characteristics can be explained by the delta wing vortex breakdown analysis. | XU KeZhe ZHANG YuFei CHEN HaiXin FU Song | 2014 | Science China(Physics,Mechanics & Astronomy)2014，57，11： | 0 |
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