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| 1 | Visualization of CO_2 and oil immiscible and miscible flow processes in porous media using NMR micro-imaging显示文摘CO_2 flooding is considered not only one of the most effective enhanced oil recovery(EOR) methods,but also an important alternative for geological CO_2 storage.In this paper,the visualization of CO_2 flooding was studied using a 400 MHz NMR micro-imaging system.For gaseous CO_2 immiscible displacement,it was found that CO_2 channeling or fingering occurred due to the difference of fluid viscosity and density.Thus,the sweep efficiency was small and the final residual oil saturation was 53.1%.For supercritical CO_2 miscible displacement,the results showed that piston-like displacement occurred,viscous fingering and the gravity override caused by the low viscosity and density of the gas was effectively restrained,and the velocity of CO_2 front was uniform.The sweep efficiency was so high that the final residual oil saturation was 33.9%,which indicated CO_2 miscible displacement could enhance oil recovery more than CO_2 immiscible displacement.In addition,the average velocity of CO_2 front was evaluated through analyzing the oil saturation prof ile.A special core analysis method has been applied to in-situ oil saturation data to directly evaluate the local Darcy phase velocities and capillary dispersion rate. | Zhao Yuechao SongYongchen Liu Yu Jiang Lanlan Zhu Ningjun | 2011 | Petroleum Science2011，8，2： | 9 |
| 2 | Effects of Yishengukang decoction on expression of bone-specific alkaline phosphatase,carboxyterminal propeptide of typeⅠprocollagen,and carboxyterminal cross-linked telepeptide of typeⅠcollagen in malignant tumor patients with bone metastasis显示文摘OBJECTIVE: To investigate the effect of Yishengukang decoction on the expression of the metabolic bone markers, bone-specific alkaline phosphatase(BAP), carboxyterminal propeptide of type Ⅰ procollagen(PICP), and carboxyterminal cross-linked telepeptide of type Ⅰ collagen(ICTP), in cancer patients with bone metastasis.METHODS: Patients(n = 180) were divided into three groups:(a) bone metastasis patients treated with Yishengukang and pamidronate disodium injection(treatment group, n = 60);(b) bone metastasis patients treated with pamidronate disodium injection alone(control group, n = 60);(c) cancer patients without metastatic bone lesion(non-bone metastasis group, n = 60). Serum levels of the metabolic markers BAP, PICP, and ICTP were detected by enzyme-linked immunosorbent assay pre- and post-therapy.RESULTS: A significant decrease in serum BAP level was observed in the treatment group compared with the control group. However there were no significant differences in serum levels of PICP and ICTP before or after treatment compared with the control group.CONCLUSION: Yishengukang decoction combined with pamidronate disodium injection reduced serum BAP level to a greater extent that pamidronate disodium injection alone. Furthermore, the combined therapy was more beneficial in regulating imbalanced bone metabolism after bone metastasis,and may represent the molecular mechanism underpinning the effects of Yishengukang decoction. | Yin Yukun Feng Li Zhou Lei Li Jie Gao Yin Wang Ningjun Yu Jianhua Jiang Zhenglong He Shengqi Lu Dianrong Wang Fang Du Yanlin | 2017 | Journal of Traditional Chinese Medicine2017，37，1： | 6 |
| 3 | Flight dynamics modeling of a small ducted fan aerial vehicle based on parameter identifcation显示文摘This paper presents a simple and useful modeling method to acquire a dynamics model of an aerial vehicle containing unknown parameters using mechanism modeling,and then to design different identifcation experiments to identify the parameters based on the sources and features of its unknown parameters.Based on the mathematical model of the aerial vehicle acquired by modeling and identifcation,a design for the structural parameters of the attitude control system is carried out,and the results of the attitude control flaps are verifed by simulation experiments and flight tests of the aerial vehicle.Results of the mathematical simulation and flight tests show that the mathematical model acquired using parameter identifcation is comparatively accurate and of clear mechanics,and can be used as the reference and basis for the structural design. | Wang Zhengjie Liu Zhijun Fan Ningjun Guo Meifang | 2013 | Chinese Journal of Aeronautics2013，26，6： | 5 |
| 4 | Adsorption Performance of Sliding Wall-Climbing Robot显示文摘Sliding wall-climbing robot(SWCR) is applied worldwide for its continuous motion,however,considerable air leakage causes two problems:great power consumption and big noise,and they constraint the robot's comprehensive performance.So far,effective theoretical model is still lacked to solve the problems.The concept of SWCR's adsorption performance is presented,and the techniques of improving utilization rate of given adsorption force and utilization rate of power are studied respectively to improve SWCR's adsorption performance.The effect of locomotion mechanism selection and seal's pressure allocation upon utilization rate of given adsorption force is discussed,and the theoretical way for relevant parameters optimization are provided.The directions for improving utilization rate of power are pointed out based on the detail analysis results of suction system's thermodynamics and hydrodynamics.On this condition,a design method for SWCR-specific impeller is presented,which shows how the impeller's key parameters impact its aerodynamic performance with the aid of computational fluid dynamics(CFD) simulations.The robot prototype,BIT Climber,is developed,and its functions such as mobility,adaptability on wall surface,payload,obstacle ability and wall surface inspection are tested.Through the experiments for the adhesion performance of the robot adsorption system on the normal wall surface,at the impeller's rated rotating speed,the total adsorption force can reach 237.2 N,the average effective negative pressure is 3.02 kPa and the design error is 3.8% only,which indicates a high efficiency.Furthermore,it is found that the robot suction system's static pressure efficiency reaches 84% and utilization rate of adsorption force 81% by the experiment.This thermodynamics model and SWCR-specific impeller design method can effectively improve SWCR's adsorption performance and expand this robot applicability on the various walls.A sliding wall-climbing robot with high adhesion efficiency is developed,and this robot has the features of light body in weight,small size in structure and good capability in payload. | LI Jun GAO Xueshan FAN Ningjun LI Kejie JIANG Zhihong JIANG Zhijian | 2010 | Chinese Journal of Mechanical Engineering2010，23，6： | 4 |
| 5 | Control and dynamics analysis for miniature autogyro and compound autogyro显示文摘Dear editor,An autogyro is a type of aircraft achieving effective low-speed flight and short take-off and landing performance.A compound autogyro is a“pure”autogyro.designed with additional fixed wings.Its rotor ensures effective low-speed flight performance,and because the wings produce most of the lift at high airspeeds many problems associated with high-speed rotor dynamics in pure autogyros(and helicopters by extension)are circumvented [1]. | Zhihao CAI Ningjun LIU Jiang ZHAO Yingxun WANG | 2019 | Science China(Information Sciences)2019，62，1： | 2 |
| 6 | Antimicrobial effect of pressurized carbon dioxide on Listeria monocytogenes显示文摘 | Lin homu Cao Ningjun Chen Lifu | 1994 | Journal of Food Science1994，59，3： | 1 |
| 7 | Production of 2,3- butanediol from pretreated corn cob byKlebsiella oxytoca in the presence of fungal cellulase显示文摘 | Ningjun Cao Youkun Xia Cheng S. Gong George T. Tsao | 1997 | Applied Biochemistry and Biotechnology1997，，1： | 1 |
| 8 | Production and action of superoxide in the renal medulla显示文摘 | Ningjun L Aiien W | 2001 | Hypertens2001，37，2： | 1 |
| 9 | 显示文摘 | HUJi-ye ZHANGDian-ying NINGJun etal(胡继业 赵殿英 宁君 等) | 2007 | 农药学学报2007，9，3： | 1 |
| 10 | The role of angiotensin converting enzyme 2 in the generation of angiotensin 1 ~7 by rat proximal tubules显示文摘 | Ningjun L Joseph Z Keding Ch | 2005 | Am J Physiol Renel Physiol2005，288，2： | 1 |
| 11 | Measurement of Immiscible CO2Flooding Processes and Permeability Reduction due to Asphaltene Precipitation by X-ray CT Imaging显示文摘 | Wang Tonglei Song Yongchen zhao Yuechao Liu Yu and Zhu Ningjun | 2013 | Energy Procedia2013，，： | 1 |
| 12 | From high-yield Ti3AlCN ceramics to high-quality Ti3CNTx MXenes through eliminating Al segregation显示文摘Ti3CNTx MXenes with unique electrical conductivity can be widely applied for supercapacitors and electromagnetic shielding.However,its relatively low-yield quaternary nitrogen-containing Ti3AlCN ce ramics precursor(less than 50%),due to the inevitable Al segregation during the synthesizing process,significantly hindered its widely commercial applications.Herein,we employed the controllable AlNoversaturation precursor strategy to precisely tune the phase transition point of quaternary Ti3AlCN ceramics to obtain high-yield Ti3 AlCN precursor for the purpose of high conductivity Ti3 CNTx MXenes.Combined energy dispersive X-ray spectrometer(XRD)with X-ray photoelectron spectroscopy(XPS)characterizations,the yield of the quaternary nitrogen-containing Ti3 AlCN ceramics was evidently proved to be up to 70%,which is 1.4 times than that of previously reported works.Such relatively highyield quaternary Ti3AlCN is mainly ascribed to the elimination of Al segregation.Based on it,we further developed accordion-like two-dimensional(2D)MXene via hydrofluoric acid etch and vacuum freezedry.This novel accordion-like 2D Ti3CNTx MXene possesses high electrochemical capacitive properties(209 F/g).Therefore,this controllable AlN-oversaturation precursor strategy will pave a way to exploit costly high-yield MAX ceramics precursor for high conductivity MXenes and also play a powerful role in promoting their practical applications including electrical and magnetic engineering fields. | Ningjun Chen Haichao Huang Zhong Xu Yanting Xie Da Xiong Xiang Chu Bingni Gu Bo Zheng Weili Deng Haitao Zhang Weiqing Yang | 2020 | Chinese Chemical Letters2020，31，4： | 1 |
| 13 | Production of L-lactic acid by Rhizopus oryzae in a bubble column fermentor显示文摘 | DU Jianxin CAO Ningjun GONG C S | 1998 | Appl BiochemBiotechnol1998，7072，1： | 1 |
| 14 | The role of angiotensin converting enzyme 2 in the generation of angiotensin 1-7 by rat proximal tubules显示文摘 | Ningjun L Joseph Z Keding C H | 2005 | Am J Physiol Renel Physiol2005，288，2： | 1 |
| 15 | Dilute acid hemicellulose hydrolysates from corn cobs for xylitol production by yeast显示文摘 | DOMINGUEZ J M CAO Ningjun GONG C S | 1997 | Bioresource Technology1997，61，1： | 1 |
| 16 | Delay-dependent robust H∞ control for uncertain time-delay systems显示文摘 | Su Ningjun Su Hongye Chu Jian | 2003 | IEE Proc:Control Theory Appl2003，150，5： | 1 |
| 17 | Pantograph-catenary are test apparatus for high-speed railway显示文摘With the continuous increase of train speed,undulations of catenary and vibrations of the pantograph head result in generating pantograph- catenary arc frequently,intensifying the abrasion between pantograph strip and catenary wire,which has seriously influenced the current collection and safety of electric multi units(EMU). It is necessary to study the pantographcatenary arc in immediately. Some researchers develop a few pantograph- catenary arc testing equipment,which couldn’t really reflect the operating condition of pantograph-catenary system. In this paper,the pantograph-catenary arc test apparatus was developed,which simulated the flexible and straight contact of pantograph strip and catenary wire,based on the coupling relationship between pantograph and catenary. The equipment was used to research the electrical parameters of the pantograph-catenary arc and the dynamic contact resistance. | WU Jie WU Guangning GAO Guoqiang ZHU Guangya HAO Jing ZHU Ningjun ZHOU Yue | 2014 | Instrumentation2014，1，2： | 1 |
| 18 | Expression and actions of HIFprolyl-4-hydroxylase in the rat kidneys 显示文摘 | Ningjun LI Fan YI Christina M | 2007 | Am J Physiol Renal Physi-ol2007，292，： | 1 |
| 19 | Onboard actuator model-based Incremental Nonlinear Dynamic Inversion for quadrotor attitude control:Method and application显示文摘This paper addresses the robust attitude control problem for quadrotors subject to model mismatch and disturbances.A dynamic inversion based attitude control scheme is proposed,which consists of an outer loop attitude controller and an inner loop angular acceleration controller.The attitude controller is designed based on the Nonlinear Dynamic Inversion(NDI)to precisely linearize the nonlinear dynamics between the angular acceleration and the attitude.An onboard actuator model-based Incremental Nonlinear Dynamic Inversion(INDI)controller is designed in the angular acceleration control loop to improve the robustness against the model mismatch and disturbances.Meanwhile,the onboard actuator model with a modified structure eliminates the oscillation phenomenon when the sampling rate of the controller is higher than that of the actuator.Numerical simulations and flight tests demonstrate the effectiveness and robustness of the proposed controller in comparison with the PID controller. | Zexin WANG Jiang ZHAO Zhihao CAI Yingxun WANG Ningjun LIU | 2021 | Chinese Journal of Aeronautics2021，34，11： | 1 |
| 20 | 显示文摘 | HUJi-ye(胡继业) ZHAODian-ying(赵殿英) NINGJun(宁君) CHENChang-long(陈长龙) LIJian-zhong(李建中) | | 农药科学学报0，，： | 1 |
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