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| 1 | Synthesis and Characterization of Osmium Polycyclic Aromatic Complexes via Nucleophilic Reactions of Osmapentalyne显示文摘 | Qin Zhu Congqing Zhu Zhihong Deng Guomei He Jiangxi Chen Jun Zhu Haiping Xia | 2017 | Chinese Journal of Chemistry2017,35,5: | 3 |
| 2 | Expression of PI3K, PTEN and Akt in small intestinaladenocarcinoma detected by quantum dots-based immunofluorescencetechnology显示文摘 | Yi Zhang Xue Yao Congqing Jiang Junqiu Yue Jing Guan Honglei Cheng Mohammed Hajirashid Yan Wang Lifang Fan | 2013 | Cancer Biomarkers2013,,4: | 1 |
| 3 | Experimental studies on sound and vibration of a two-one Chinese Peace Bell显示文摘 | Cheng Jianzheng Lan Congqing | 2003 | Journal of Sound and Vibration2003,261,: | 1 |
| 4 | The Fourier slice theorem for ultrasonic reflectivity tomography and the correction to the effect caused by curvature of integral lines显示文摘For ultrasonic reflective tomographic imaging of differenttransmitter-receiver mode,we demonstrate that the Fourier slice theorem canbe used when the distance between the transducer and origin becomes muchlarger than the object to be reconstructed.Iterative reconstruction formulabased on the Fourier slice theorem is proposed for the case in which theparaxial approximation holds.The effect caused by the curvature of integrallines may be eliminated iteratively and better reconstructed images can be ex-pected. | LAN Congqing and CHEN Yanhua Wuhan Institute of Physics, Academia Sinica, Wuhan 430071)with the Institute of Acoustics, Academia Sinica. | 1993 | Chinese Journal of Acoustics1993,12,1: | 1 |
| 5 | Acoustical diffraction tomographic imaging under non-weak scattering显示文摘Under the assumption of weak scattering,the acousticaldiffraction tomographic imaging of an object can be reconstructed byusing the Born (or Rytov) approximation method.When the weak scat-tering assumption within the medium is not satisfied the multipleultrasound scattering must be taken into account.In this case,the reconstruction results under the first-order Born approximation will beseriously distorted.In this paper we introduce an'intermediate objectfunction'into the wave equation and take iterative modification in spacedomain and spatial frequancy domain based on Born approximation.Inthis way,the distorted image will be improved step by step.In order toexamine the method as mentioned above,we have just tried to makecomputerized simulations.The initial result shows that the quality of theimage reconstructed from the object under non-weak scattering may beimproved significantly. | LAN Congqing XU Keke and ZHU Nianqiou(Wuhan Institute of Physics Academia Sinica ) | 1991 | Chinese Journal of Acoustics1991,10,1: | 1 |
| 6 | Dinitrogen cleavage and hydrogenation to ammonia with a uranium complex显示文摘The Haber-Bosch process produces ammonia(NH_(3))from dinitrogen(N_(2))and dihydrogen(H_(2)),but re quires high temperature and pressure.Before iron-based catalysts were exploited in the current industrial Haber-Bosch process,uranium-based materials served as effective catalysts for production of NH_(3)from N_(2).Although some molecular uranium complexes are known to be capable of combining with N_(2),further hydrogenation with H_(2)forming NH_(3)has not been reported to date.Here,we describe the first example of N_(2)cleavage and hydrogenation with H_(2)to NH_(3)with a molecular uranium complex.The N_(2)cleavage product contains three uranium centers that are bridged by three imido μ_(2)-NH ligands and one nitrido μ_(3)-N ligand.Labeling experiments with^(15)N demonstrate that the nitrido ligand in the product originates from N_(2).Reaction of the N_(2)-cleaved complex with H_(2)or H^(+)forms NH_(3)under mild conditions.A synthetic cycle has been established by the reaction of the N_(2)-cleaved complex with trimethylsilyl chloride.The isolation of this trinuclear imido-nitrido product implies that a multi-metallic uranium assembly plays an important role in the activation of N_(2). | Xiaoqing Xin Iskander Douair Yue Zhao Shuao Wang Laurent Maron Congqing Zhu | 2023 | National Science Review2023,10,2: | 0 |
| 7 | RESEARCH ON DIGITAL ACTIVEFLUTTER SUPPRESSION显示文摘RESEARCHONDIGITALACTIVEFLUTTERSUPPRESSIONZouCongqing,ChenGuibin(5-thDepartment,BeijingUniversityofAeronauticsandAstronautics,... | Zou Congqing ChenGuibin(5-th Department, Beijing University ofAeronautics and Astronautics, Beijing, China, 100083) | 1994 | Chinese Journal of Aeronautics1994,7,4: | 0 |
| 8 | Synthesis,characterization and reactivity of a neutral antimony(Ⅲ) complex显示文摘Pincer complexes are widely used in organometallic and coordination chemistry.The role of antimony as a central donor atom in pincer ligands has been extensively explored in recent years.Although phenylenediamine derived PXP(X=B,Al,C,Si,Ge,Sn,N) type ligands exhibit diverse reactivity,analogues species based on antimony have been reported less frequently.Herein,we report a new PSbP complex and evaluate its reactivity.These species will broaden the family of phenylenediamine derived pincer complexes. | Xiong Sun Congqing Zhu | 2021 | Chinese Chemical Letters2021,32,2: | 0 |
| 9 | Regulation of HIF-1 α to Expression of N-myc Downstream Regulated Gene 1 in Colorectal Carcinoma显示文摘Plasmid expressing small interfering RNA (siRNA) against HIF-1a (pSilence-2.1-U6-siRNA) was constructed and transfected into LS174T cells in hypoxia condition.After expression of siRNA against HIF-1α in LS174T cells,expressions of HIF-1α and N-myc downstream regulated gene 1 (NDRG1) gene were inhibited significantly. HIF-1α a transcripts were positive in 67.7% (42/62) and 44.4% (8/18) of colorectal adenocarcinoma and adenoma,respectively. The mean percentage of cells with positive hybridization of HIF-1α mRNA increases with the development from Duke stage A to stage C+D (p <0.05). The positive staining rate of NDRG1 protein was significant higher in colorectal adenocarcinoma group than that in colorectal adenoma group (p<0.05). The level of HIF-1 α transcripts was positively correlated with the level of NDRG1 protein (p <0.05) during colorectal tumor progression. HIF-1a and its down stream gene NDRG1 may play roles in tumor progression of human colorectal carcinoma. | ZHAO Duanyi LIU Zhisu JIANG Congqing BANGOURA Gassimou WU Kailang WU Jianauo | 2007 | Wuhan University Journal of Natural Sciences2007,12,3: | 0 |
| 10 | A Uranium(Ⅳ) Alkyl Complex: Synthesis and Catalytic Property in Carbonyl Hydroboration显示文摘The strong oxophilicity of actinide complexes prevents their applications in the transformation of oxygen-containing substrates.Herein,we report the use of a uranium(Ⅳ)alkyl complex as a catalyst for the hydroboration of carbonyl compounds.This reaction has good functional group tolerance and chemo-selectivity under mild conditions.This study represents the rare example of catalytic reaction promoted by a uranium alkyl complex and highlights the potential of uranium complexes in synthetic chemistry. | Xiong Sun Xingxing Gong Zhuoyi Xie Congqing Zhu | 2022 | Chinese Journal of Chemistry2022,40,17: | 0 |
| 11 | Inverse Model Control for a Quad-rotor Aircraft Using TS-fuzzy Support Vector Regression显示文摘An inverse model control based on TS-fuzzy support vector regression( TS-fuzzy SVR) for a quadrotor aircraft is developed. The TS-kernel is the product of linear combination of input and a cluster of output corresponding to a cluster of TS-type fuzzy rules. The output of TS-fuzzy SVR is a linear weighted sum of the TSkernels. The dynamical model of the quad-rotor aircraft is derived. A new control scheme combined with TSfuzzy SVR inverse model control and PID control is presented so that the TS-fuzzy SVR inverse model control enhances capabilities of disturbance rejection and the robustness while the PID control enhances fast responsiveness and reliability of the system. Simulation results show the capabilities of the developed control for the attitude system of quad-rotor aircraft. | Zhiyu Li Hanxin Chen Congqing Wang Kaijia Xue | 2017 | Journal of Harbin Institute of Technology(New Series)2017,24,6: | 0 |
| 12 | Modelling and Backstepping Motion Control of the Aircraft Skin Inspection Robot显示文摘Aircraft skin health concerns whether the aircraft can fly safely.In this paper,an improved mechanical structure of the aircraft skin inspection robot was introduced.Considering that the aircraft skin surface is a curved environment,we assume that the curved environment is equivalent to an inclined plane with a change in inclination.Based on this assumption,the Cartesian dynamics model of the robot is established using the Lagrange method.In order to control the robot’s movement position accurately,a position backstepping control scheme for the aircraft skin inspection robot was presented.According to the dynamic model and taking into account the problems faced by the robot during its movement,a position constrained controller of the aircraft skin inspection robot is designed using the barrier Lyapunov function.Aiming at the disturbances in the robot,we adopt a fuzzy system to approximate the unknown dynamics related with system states.Finally,the simulation results of the designed position constrained controller were compared with the sliding mode controller,and prove the validity of the position constrained controller. | Junjun Jiang Congqing Wang | 2019 | Computer Modeling in Engineering & Sciences2019,,7: | 0 |
| 13 | Uranium(Ⅲ)–Phosphorus(Ⅲ) Synergistic Activation of White Phosphorus and Arsenic显示文摘The study of small-molecule activation by f-block elements still lags far behind that of transition metals.Although a few uranium complexes have been reported to activate dinitrogen,reports on the activation of heavier congeners,such as white phosphorus(P_(4)),by uranium species are extremely rare,and no example of uranium-mediated activation of elemental arsenic has appeared. | Wei Fang Iskander Douair Adrian Hauser Kai Li Yue Zhao Peter WRoesky Shuao Wang Laurent Maron Congqing Zhu | 2022 | CCS Chemistry2022,4,8: | 0 |
| 14 | Complex Featuring Two Double Dative Bonds Between Carbon(0)and Uranium显示文摘The uranyl with two U=O double bonds is a wellknown and predominant form of uranium in the environment,but the carbon-based analog with two U=C double bonds has rarely been synthesized.Here,we describe the formation of an unprecedented uranium complex[(PyPh_(2)P)_(2)C]_(2)UCl_(2)]^(2+)·2(BPh_(4)^(−))from the reaction of UCl4 with carbodiphosphorane in the presence of NaBPh4.The nature of the U-C bonds was revealed by density functional theory calculations,which show that the 5f and 6d orbital electrons of uranium are remarkably involved in the U=C double bonds.The inspection of the bonding characteristics with an energy decomposition analysis suggests that the uranium-ligand bond may be alternatively described with double dative bonds[C⇉U⇇C]or strong electron-sharing π bonds and weak σ bonds. | Wei Fang Sudip Pan Wei Su Shuao Wang Lili Zhao Gernot Frenking Congqing Zhu | 2022 | CCS Chemistry2022,4,6: | 0 |
| 15 | Carbon-halogen bond activation by a structurally constrained phosphorus(Ⅲ)platform显示文摘Theσ-bond activation by main group element has received enormous attention from theoretical and experimental chemists.Here,the reaction of C-X(X=Cl,Br,I)bonds in benzyl and allyl halides with a pincer-type phosphorus(Ⅲ)species was reported.A series of structurally robust phosphorus(Ⅴ)compounds were formed via the formal oxidative addition reactions of C-X bonds to the phosphorus(Ⅲ)center.Density functional theory calculations show that the nucleophilic addition process is more favorable than the direct oxidative addition mechanism.Isomerization of bent structures of phosphorus(Ⅲ)compound to poorly nucleophilic compounds to undergo further C-X bond activation can be rationalized by frontier molecule orbital analysis.This study not only provides a deep understanding of the reactivity of phosphorus(Ⅲ)species but also demonstrates a potential of main group elements for the small-molecule activation. | Penglong Wang Qin Zhu Yi Wang Guixiang Zeng Jun Zhu Congqing Zhu | 2021 | Chinese Chemical Letters2021,32,4: | 0 |