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| 1 | Preparation of nano-sized Bi_2Te_3 thermoelectric material powders by cryogenic grinding | Xiaozong Chen a, Leifeng Liu b, Yuan Dong a, Lianjun Wang a, Lidong Chen c, Wan Jiang a, a State Key Laboratory for Modification of Chemical Fibers and Polymer Materials, Donghua University, 2999 people of North Road, Shanghai 201620, PR China b Department of Materials and Environmental Chemistry, Stockholm University, SE-106 91 Stockholm, Sweden c Shanghai Institute of Ceramics, Chinese Academy of Sciences, 1295 Dingxi Road, Shanghai 200050, PR China | 2012 | Progress in Natural Science:Materials International2012，22，3： | 8 |
| 2 | Sources and characteristics of carbonaceous aerosol in two largest cities in Pearl River Delta Region, China显示文摘 | Jingchun Duan Jihua Tan Dingxi Cheng Xinhui Bi Wenjing Deng Guoying Sheng Jiamo Fu M.H. Wong | 2006 | Atmospheric Environment2006，，14： | 2 |
| 3 | 折合频率对三维跨声速压气机颤振稳定性的影响显示文摘It is well known that fan/compressor blade flutter stability increases with the increase of reduced frequency.Less well-known is that the least stable inter blade phase angle(IBPA)increases with the drop of reduced frequency.However,it is quite striking that little can be found in the open literature about the mechanism to the observations.In this paper,a numerical investigation is carried out to uncover the mechanism of the effect of reduced frequency on flutter stability and the least stable IBPA.The NASA rotor 67 has been used as the test vehicle with its first bending and torsion modes being considered.The time domain harmonic balance method together with the influence coefficient method is used to obtain the worksum-IBPA curves for all cases.It is found that:1)the deterioration of flutter stability with the decrease of reduced frequency is dictated by the dominant decrease of aerodamping due to a blade own vibration;2)the increase of the least stable IBPA with the decrease of reduced frequency arises largely from the increase of the least stable IBPA of the aerodamping from the nearest blade on a blade pressure side. | Ruichao Shi Yufang Li Dingxi Wang | 2022 | 风机技术2022，64，3： | 2 |
| 4 | 定西地区重点治理小流域抗旱减灾成效分析显示文摘1995年,定西地区遭受了1928年以来最为严重的干旱,全区粮食减产幅度达45.5%,有102个乡、52万人、19万头大牲畜、37万头(只)猪羊无粮草可食。定西水保所对官兴、里仁等四条重点治理小流域及其相邻的对比小流域进行的系统调查结果表明:与正常年相比,尽管重点治理小流域与对比小流域小麦产量均有大幅度减产,但对比小流域的产量仅为相应重点治理小流域的37%~70%,重点治理小流域所产粮食、"三料"加上上年结余,基本可以满足需求,对比小流域缺口较大;重点治理小流域人畜饮水可基本得到解决,而对比流域发生了水荒。建议各级人民政府切实加强水土保持工作,推广聚流集水技术,稳定解决人畜饮水,正确引导脱贫群众的消费趋向,使群众有一定的粮草储备,真正做到逢灾不见灾,以保证经济平稳发展。 | Dingxi Prefetural Soil and Water Conservation Scientific Research institute | 1996 | 中国水土保持1996，，1： | 1 |
| 5 | Prevalence and risk factors of prolonged grief disorder among bereaved survivors seven years after the Wenchuan earthquake in China: A cross-sectional study显示文摘Background:This study aimed to determine the prevalence and predictive factors of prolonged grief disorder(PGD)among those bereaved by the Wenchuan earthquake in Southwestern China seven years after the event.Methods:A cross-sectional survey based on census tracts was conducted on the bereaved earthquake survivors.Responses to the questionnaire regarding PGD and its potential associated factors were obtained either through face-to-face or telephone interview.PGD was screened by a validated Chinese version of the PGD questionnaire-13(PG-13).Bivariate and multivariate regression analyses were used to determine the prevalence and associated risk factors of PGD.Results:A total of 1464 bereaved earthquake survivors,with a response rate of 97.6%,were included in the study.Of the 1464 respondents studied,124(8.47%)were diagnosed with PGD.Multivariate regression analysis demonstrated that PGD in the bereaved earthquake individuals was significantly associated with several factors,including age,economic burden,close kinship with the deceased,and living with the deceased before the loss.Wenchuan earthquake bereaved aged 41e60 years were more likely to develop PGD compared to those aged younger than 40 or older than 60(OR=2.075,95%CI=1.297e3.319).Those who had a close kinship with the deceased had a higher tendency to develop PGD(OR=5.144,95%CI=2.716e9.740).The odds of PGD among the earthquake bereaved with economic burdens were higher relative to those who did not experience an economic burden(OR=8.123,95%CI=2.657e24.831).Those who living with the deceased before loss also had a higher tendency to develop PGD(OR=0.179,95%CI=0.053e0.602).Conclusions:This study revealed that a significantly high proportion(8.47%)of the Wenchuan earthquake-bereaved remain grieving seven years after the event.Those diagnosed with PGD should receive appropriate interventions from clinical psychologists.The risk factors identified in this study are crucial for the early screening and prevention of PGD in future nursing and psycho-clinical practices. | Xin Yi Jing Gao Chenxi Wu Dingxi Bai Yingchun Li Ni Tang Xiaoyun Liu | 2018 | International Journal of Nursing Sciences2018，5，2： | 1 |
| 6 | Sources and characteristics of carbonaceous aerosol in two largest cities in Pearl River Delta Region, China显示文摘 | Jingchun Duan Jihua Tan Dingxi Cheng Xinhui Bi Wenjing Deng Guoying Sheng Jiamo Fu M.H. Wong | 2006 | Atmospheric Environment2006，，14： | 1 |
| 7 | BRAF V600E Maintains Proliferation, Transformation, and Tumorigenicity of BRAF-Mutant Papillary Thyroid Cancer Cells显示文摘 | Dingxie Liu Zhi Liu Stephen Condouris Mingzhao Xing | 2007 | The Journal of Clinical Endocrinology & Metabolism2007，，6： | 1 |
| 8 | Sources and characteristics of carbonaceous aerosol in two largest cities in Pearl River Delta Region, China显示文摘 | Jingchun Duan Jihua Tan Dingxi Cheng Xinhui Bi Wenjing Deng Guoying Sheng Jiamo Fu M.H. Wong | 2006 | Atmospheric Environment2006，，14： | 1 |
| 9 | Genetic Alterations and Their Relationship in the Phosphatidylinositol 3-Kinase/Akt Path- way in Thyroid Cancer显示文摘 | Peng Hou Dingxie Liu Yuan Shan | 2007 | Clin Cancer Res2007，13，4： | 1 |
| 10 | A reduced order model for coupled mode cascade flutter analysis显示文摘A Reduced Order Model(ROM)based analysis method for turbomachinery cascade coupled mode flutter is presented in this paper.The unsteady aerodynamic model is established by a system identification technique combined with a set of Aerodynamic Influence Coefficients(AIC).Subsequently,the aerodynamic model is encoded into the state space and then coupled with the structural dynamic equations,resulting in a ROM of the cascade aeroelasticity.The cascade flutter can be determined by solving the eigenvalues of the ROM.Bending-torsional coupled mode flutter analysis for the Standard Configuration Eleven(SC11)cascade is used to validate the proposed method. | Huang HUANG Xinkai JIA Jia REN Bochao CAO Dingxi WANG Xiuquan HUANG | 2022 | Chinese Journal of Aeronautics2022，35，10： | 1 |
| 11 | Microstructure and Properties of Plasma Spraying Boron Carbide Coating显示文摘Microstructure of plasma spray boron carbide coating was studied by SEM and TEM. its physical, mechanical and electrical properties were measured. The results showed that high microhardness. modulus and low porosity of B4C coating were manufactured by plasma spray. It was lamellar packing and dense. The B4C coating examined here contained two principal structures and two impurity phase besides major phase. The relatively small value of Young’s modulus, comparing with that of the bulk materials, is explained by porosity. The Fe impurity phase could account for the relatively high electrical conductivity of boron carbide coating by comparing with the general boron carbide materials. | Yi ZENG, Jingwei FENG and Chuanxian DING (Shanghai Institute of Ceramics, Chinese Academy of Sciences, 1295 Dingxi Road, Shanghai 200050, China) | 2000 | Journal of Materials Science & Technology2000，16，1： | 1 |
| 12 | Study on catalytic fluorimetric determination of trace manganese显示文摘 | Guien Zhang Dingxi Cheng Suling Feng | 1993 | Talanta1993，40，7： | 1 |
| 13 | A comparative study of the k-means algo-rithm and the normal mixture model for clustering:bi-variate homoscedastic case显示文摘 | QIU Dingxi | 2010 | Journal of StatisticalPlanning and Inference2010，140，7： | 1 |
| 14 | Inhibitory effects of the mitogen-activated protein kinase kinase inhibitor CI-1040 on the proliferation and tumor growth of thyroid cancer cells with BRAF or RAS mutations显示文摘 | Dingxie L Zhi L David J | | J Clin Endocinol Metab0，92，12： | 1 |
| 15 | Effect of constant eddy viscosity assumption on optimization using a discrete adjoint method显示文摘This paper presents a thorough study of the effect of the Constant Eddy Viscosity(CEV)assumption on the optimization of a discrete adjoint-based design optimization system.First,the algorithms of the adjoint methods with and without the CEV assumption are presented,followed by a discussion of the two methods’solution stability.Second,the sensitivity accuracy,adjoint solution stability,and Root Mean Square(RMS)residual convergence rates at both design and offdesign operating points are compared between the CEV and full viscosity adjoint methods in detail.Finally,a multi-point steady aerodynamic and a multi-objective unsteady aerodynamic and aeroelastic coupled design optimizations are performed to study the impact of the CEV assumption on optimization.Two gradient-based optimizers,the Sequential Least-Square Quadratic Programming(SLSQP)method and Steepest Descent Method(SDM)are respectively used to draw a firm conclusion.The results from the transonic NASA Rotor 67 show that the CEV assumption can deteriorate RMS residual convergence rates and even lead to solution instability,especially at a near stall point.Compared with the steady cases,the effect of the CEV assumption on unsteady sensitivity accuracy is much stronger.Nevertheless,the CEV adjoint solver is still capable of achieving optimization goals to some extent,particularly if the flow under consideration is benign. | Hangkong WU Dingxi WANG Xiuquan HUANG | 2023 | Chinese Journal of Aeronautics2023，36，11： | 0 |
| 16 | Nonlinear uncertainty quantification of the impact of geometric variability on compressor performance using an adjoint method显示文摘Manufactured blades are inevitably different from their design intent,which leads to a deviation of the performance from the intended value.To quantify the associated performance uncertainty,many approaches have been developed.The traditional Monte Carlo method based on a Computational Fluid Dynamics solver(MC-CFD)for a three-dimensional compressor is prohibitively expensive.Existing alternatives to the MC-CFD,such as surrogate models and secondorder derivatives based on the adjoint method,can greatly reduce the computational cost.Nevertheless,they will encounter’the curse of dimensionality’except for the linear model based on the adjoint gradient(called MC-adj-linear).However,the MC-adj-linear model neglects the nonlinearity of the performance function.In this work,an improved method is proposed to circumvent the lowaccuracy problem of the MC-adj-linear without incurring the high cost of other alternative models.The method is applied to the study of the aerodynamic performance of an annular transonic compressor cascade,subject to prescribed geometric variability with industrial relevance.It is found that the proposed method achieves a significant accuracy improvement over the MC-adj-linear with low computational cost,showing the great potential for fast uncertainty quantification. | Qian ZHANG Shenren XU Xianjun YU Jiaxin LIU Dingxi WANG Xiuquan HUANG | 2022 | Chinese Journal of Aeronautics2022，35，2： | 0 |
| 17 | Dendritic spine pathology in autism: lessons learned from mouse models显示文摘 | Qiangge Zhang Dingxi Zhou Guoping Feng | 2016 | Journal of Translational Neuroscience2016，1，2： | 0 |
| 18 | Transition from Unsteady Flow Inception to Rotating Stall and Surge in a Transonic Compressor显示文摘Since the transition from rotating stall to surge in a transonic compressor at high speed is very quick,quite often there is no time to take measures to prevent the surge.Therefore,it is desired to find any rotating stall precursors,of which the occurrence can offer sufficient time for stall or surge prevention.In this study,a series of unsteady flow analyses were performed on a transonic compressor under operating conditions before rotating stall with unsteady results scrutinized to find rotating stall precursors.Particular attention is paid to the spatial modes and time modes of static pressure near the casing and around the blade leading and trailing edges.The results show that the characteristics of the precursor in both spatial and time domains can be used as rotating stall warnings. | CAO Dongming YUAN Caijia WANG Dingxi HUANG Xiuquan | 2022 | Journal of Thermal Science2022，31，1： | 0 |
| 19 | Revisiting the space-time gradient method:A time-clocking perspective, high order difference time discretization and comparison with the harmonic balance method显示文摘This paper revisits the Space-Time Gradient(STG) method which was developed for efficient analysis of unsteady flows due to rotor–stator interaction and presents the method from an alternative time-clocking perspective. The STG method requires reordering of blade passages according to their relative clocking positions with respect to blades of an adjacent blade row. As the space-clocking is linked to an equivalent time-clocking, the passage reordering can be performed according to the alternative time-clocking. With the time-clocking perspective, unsteady flow solutions from different passages of the same blade row are mapped to flow solutions of the same passage at different time instants or phase angles. Accordingly, the time derivative of the unsteady flow equation is discretized in time directly, which is more natural than transforming the time derivative to a spatial one as with the original STG method. To improve the solution accuracy, a ninth order difference scheme has been investigated for discretizing the time derivative. To achieve a stable solution for the high order scheme, the implicit solution method of Lower-Upper Symmetric GaussSeidel/Gauss-Seidel(LU-SGS/GS) has been employed. The NASA Stage 35 and its blade-countreduced variant are used to demonstrate the validity of the time-clocking based passage reordering and the advantages of the high order difference scheme for the STG method. Results from an existing harmonic balance flow solver are also provided to contrast the two methods in terms of solution stability and computational cost. | Boqian WANG Dingxi WANG Mohammad RAHMATI Xiuquan HUANG | 2022 | Chinese Journal of Aeronautics2022，35，11： | 0 |
| 20 | Effects of A1 Additions on Microstructure and Mechanical Properties of MoSi_2显示文摘The effects of Al additions on the microstructure and mechanical properties of MoSi2 have been studied. With the A1 additions from 2.5 wt pct to 5 wt pct, the siliceous grain boundary phase in hot pressed samples was eliminated because of the formation of Al2O3 particles. It was shown that Al and SiO2 reacted at 860℃. During the reaction, A1 atoms were mainly transferred to Al2O3 particles, and to some extent, diffused into MoSi2 grains. Both the toughness and strength of Al containing composites exceeded those of pure MoSi2 material. Bending strength and fracture toughness reach the highest value of 350 MPa, 4.05 MPa.m1/2, respectively, at ambient temperature when Al addition was of 3.5 wt pct. | Jianlin LI Dongliang JIANG and Shouhong TAN(Shanghai Institute of Ceramics, Chinese Academy of Sciences, 1295 Dingxi Road, Shanghai 200050, China) | 1999 | Journal of Materials Science & Technology1999，15，6： | 0 |
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