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Preparation, Crystal Structure and Thermal Decomposition Process of Dysprosium Benzoate Complex with 1,10-Phenanthroline

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Chinese Journal of Structural Chemistry 2008年第2期27卷 233-237页

作者： XU Su-Ling zhang jian-Jun REN Ning zhang Hai-Yan HU Rui-sheng Experimental Center Hebei Normal UJziversity Shijiazhuang 050016 China Department of Engineering Shijiazhuang Foreign Economy and Trade Vocational College Shijiazhuang 050061 China Department of Chemistry Handan College Handan 056005 China School of Chemical Engineering Shijiazhuang College Shijiazhuang 050035 China

A dinuclear dysprosium（III） complex with benzoic acid and 1,10-phenanthroline, [Dy（BA）3phen]2 （BA = benzoate, PHEN = 1,10-phenanthroline）（C66H46Dy2NaO12, Mr = 1412.07） was synthesized and characterized by elemental analysis, UV, IR, X-ray diffraction, molar conductance and TG-DTG techniques. It crystallizes in triclinic, space group P1 with a = 10.773（2）, b = 11.933（3）, c = 12.417（5） A, α= 105.226（3）,β= 93.470（3）, γ= 113.475（2）°, V= 1388.0（7）, Z = 1, Dc = 1.689 g/cm3, μ（MoKa） = 2.742 mm-1 and F（000） = 698. R = 0.0210, wR = 0.0538. In the crystal, each Dy（III） ion is eight-coordinated by one bidentate chelating carboxylate group, four bidentate bridging carboxylate groups and one 1,10-phenanthroline molecule. The thermal decomposition process of [Dy（BA）3phen]2 has been determined by thermal analysis.

关键词： benzoic acid crystal structure 1,10-phenanthroline dysprosium complex thermal analysis

Cellular model of neuronal atrophy induced by DYNC111 deficiency reveals protective roles of RAS-RAF-MEK signaling

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Protein & Cell 2016年第9期7卷 638-650页

作者： Zhi-Dong Liu Su zhang jian-Jin Hao Tao-Rong Xie jian-sheng Kang Key Laboratory of Nutrition and Metabolism Institute for Nutritional Sciences Shanghai Institutes for Biological Sciences Chinese Academy of Sciences Shanghai 200231 China University of Chinese Academy of Sciences Beijing 100049 China

Neuronal atrophy is a common pathological feature occurred in aging and neurodegenerative diseases. A variety of abnormalities including motor protein mal- function and mitochondrial dysfunction contribute to the loss of neuronal architecture; however, less is known about the intracallular signaling pathways that can pro- tect against or delay this pathogenic process. Here, we show that the DYNClll deficiency, a neuron-specific dynein intermediate chain, causes neuronal atrophy in primary hippocampal neurons. With this cellular model, we are able to find that activation of *** signaling protects against neuronal atrophy induced by DYNClll deficiency, which relies on MEK-dependent autophagy in neuron. Moreover, we further reveal that BRAF also protects against neuronal atrophy induced by mitochondrial impairment. These findings demon- strate protective roles of the RAS-RAF-MEK axis against neuronal atrophy, and imply a new therapeutic target for clinical intervention.

关键词： RAS-RAF-MEK pathway atrophy dyneinintermediate chain mitochondria hippocampal neuron,autophagy

Long-term survival trends of gastric cancer patients between 1972 and 2011 in Qidong

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Chinese Journal of Cancer 2015年第12期34卷 602-607页

作者： Yong-sheng Chen jian-Guo Chen jian Zhu Yong-Hui zhang Lu-Lu Ding Qidong Liver Cancer Institute Qidong People's Hospital Department of Epidemiology Nantong University Tumor Hospital/Institute

Background:There have been few reports on long-term survival of gastric cancer *** study analyzed the survival data of gastric cancer patients obtained from the population-based Qidong Cancer Registry between 1972 and 2011,providing a basis for evaluation of gastric cancer treatment and ***:The cumulative observed survival rate and relative survival rate of gastric cancer patients were calculated using Hakulinen's method via the SURV3.01 software,which was developed by the Finnish Cancer *** date of the last follow-up for the survival status of the 15,401 registered cases was April 30,***:The 1-,5-,10-,20-,and 30-year observed survival rates were 33.82%,14.18%,10.35%,6.63%,and 4.19%,respectively,and the 1-,5-,10-,20-,and 30-year relative survival rates were 35.43%,18.13%,17.50%,21.96%,and32.84%,*** males,the corresponding observed survival rates were 34.50%,14.40%,10.42%,6.46%,and4.05%,and the corresponding relative survival rates were 36.23%,18.67%,18.28%,23.73%,and 38.61%.For females,the corresponding observed survival rates were 32.62%,13.80%,10.22%,6.95%,and 4.46%,and the corresponding relative survival rates were 34.03%,17.21%,16.28%,19.70%,and 26.78%.Significant differences in relative survival rates were observed between sexes(P=0.003).For the 15-34,35-44,45-54,55-64,65-74,and 75+ age groups,the 5-year relative survival rates were 16.13%,21.77%,18.63%,12.61%,7.99%,and 2.94%,respectively,and the 10-year relative survival rates were 16.49%,22.83%,20.50%,15.97%,15.88%,and 15.73%,*** improvement could be observed for the 5-,10-,and 15-year relative survival rates in Qidong beginning in the 1980 ***:The survival outcome of registered gastric cancer cases in Qidong showed gradual progress over the past two decades.

关键词： Gastric neoplasms, Cancer registration, Survival,Trends, Qidong

Comparison of neutron energy spectrum unfolding methods and evaluation of rationality criteria

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Nuclear Science and Techniques 2022年第12期33卷 159-172页

作者： Jun‑Kai Yang Ping‑Quan Wang Zhong‑Guo Ren Ren‑sheng Wang Hui zhang jian zhang National Institute of Metrology Beijing 100029China Institute of Applied Electronics China Academy of Engineering PhysicsMianyang 621900China School of Radiation Medicine and Protection Medical College of Soochow UniversitySuzhou 215123China Collaborative Innovation Center of Radiological Medicine of jiangsu Higher Education Institutions Suzhou 215123China

The neutron energy spectrum was measured using a Bonner sphere spectrometer at six locations inside the containment vessel of a nuclear reactor at the Qinshan nuclear power plant. The structures of the neutron spectra obtained by the maximum entropy, iteration, and genetic algorithm methods were consistent with one another and could be interpreted as the spectral superposition of different energy regions. The characteristic parameters of the neutron spectrum, including the fluence rate,average energy, and neutron ambient dose equivalent rate H^(*)(10), were in good agreement among the three methods. In addition, an LB6411 neutron ambient dose equivalent meter was employed to obtain the H^(*)(10) directly for *** findings indicate that neutron spectrum unfolding methods can be used to overcome the problems associated with the response functions of dosimeters to provide more accurate H^(*)(10) values. In this study, the following three evaluation criteria were systematically addressed to ensure the accuracy of the unfolded spectra: count rates of the inverse solutions,neutron spectrum structures, and comparison of key parameters.

关键词： Neutron spectrum ̇H∗(10) Nuclear power plant Evaluation criteria

Jahn-Teller Effect Directed Bandgap Tuning of Birnessite for Pseudocapacitive Application

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Energy & Environmental Materials 2023年第3期6卷 222-228页

作者： sheng Zhu Yuechao Wang Jinshu zhang jian sheng Feng Yang Meng Wang jiangfeng Ni Hong jiang Yan Li Beijing National Laboratory for Molecular Sciences Key Laboratory for the Physics and Chemistry of NanodevicesState Key Laboratory of Rare Earth Materials Chemistry and ApplicationsCollege of Chemistry and Molecular EngineeringPeking UniversityBeijing 100871China Institute of Molecular Science Key Laboratory of Chemical Biology and Molecular Engineering of Education MinistryShanxi UniversityTaiyuan 030006China Beijing National Laboratory for Molecular Sciences Institute of Theoretical and Computational ChemistryCollege of Chemistry and Molecular EngineeringPeking UniversityBeijing 100871China School of Physical Science and Technology Center for Energy Conversion Materials&Physics(CECMP)Jiangsu Key Laboratory of Thin FilmsSoochow UniversitySuzhou 215006China

Birnessite M_(x)MnO_(2)(M=Na^(+),K^(+),etc.)has emerged as a promising alternative to the classical MnO_(2)material owing to its improved pseudocapacitive performance for energy *** their structure–property correlation is essential for the development and application of advanced ***,we adopt the crystal field theory and density functional simulation to reveal the structural dependence of the pseudocapacitive property of M_(x)MnO_(2).Attributing to the Jahn–Teller effect of Mn^(3+),the bandgap of Kx MnO_(2)can be tuned by changing the x value(i.e.,the Mn(III)/Mn(IV)ratio).Then,we design a narrow-bandgap K 0.25 MnO_(2)(0.84 eV),which affords a high capacitance of 415 F g^(-1)at 1 A g^(-1)and a desirable rate capability of 293 F g^(-1)at 20 A g^(-1).Operando Raman spectroscopy confirms that the Jahn–Teller induced structure evolution of[MnO_(6)]octahedron accounts for the superior pseudocapacitive behavior of K_(0.25)MnO_(2).This finding offers theoretical guidance to the design and application of birnessite materials for pseudocapacitors.

关键词： birnessite charge storage Jahn–Teller effect manganese dioxide supercapacitor

Ab initio Study on Structures and Isomerization of Magnesium Fluorosilylenoid H2SiFMgF

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Chinese Journal of Chemical Physics 2008年第6期21卷 541-546页

作者： Yi-jian zhang Mei-jiang Li Guo-qiao Lai Da-cheng Feng sheng-yu Feng Key Laboratory of Organosilicon Chemistry and Material Technology of Ministry of Education Hangzhou Normal University Hangzhou 310012 China School of Chemistry and Chemical Engineering Shandong University Ji'nan 250100 China

The structures and isomerization of magnesium fluorosilylenoid H2SiFMgF were investigated by ab initio molecular orbital theory. Four equilibrium structures and three isomeric transition states were located and fully optimized at the B3LYP/6-31G（d,p） and G3MP2B3 levels, respectively. Based on the B3LYP/6- 31G（d,p） optimized geometries, harmonic frequencies of various structures were obtained and 29Si chemical shifts were calculated. The solvent effects were investigated by means of the polarizable continuum model using THF as a solvent at B3LYP/6-31G（d,p） level. Isomerization paths for isomers were confirmed by intrinsic reaction coordinate calculations. The calculated results show that tetrahedral structure has the lowest energy and is the most stable; tetrahedral, three-membered ring, and p-complex structures are suggested to be the experimentally detectable ones; and a-complex structure has the highest energy and will not exist.

关键词： Magnesium fluorosilylenoid Ab initio calculation B3LYP/6-31G(d p) theory Isomerization

Novel Cylinder Movement Modeling Method Based on Aerodynamics

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Chinese Journal of Mechanical Engineering 2017年第5期30卷 1193-1202页

作者： jian-Qing zhang Xiao-Mei Hu Jin-sheng Kang Feng Xiong Ning Zeng School of Mechatronic Engineering and Automation Key Laboratory of Intelligent Manufacturing and RoboticsShanghai University College of Engineering Design and Physical SciencesBrunel University London

The cylinder movement is affected by multiple factors and it is difficult to establish the accurate movement model of the cylinder. In order to improve the reliability of the production line design and to speed up the production line debugging, a novel cylinder movement modeling method based on aerodynamics is proposed. The kinetic theory, thermodynamic theory and kinematics knowledge are applied and integrated various factors which affect the movement characteristics of the cylinder are considered. According to the proposed mathematical model of cylinder movement, thecombined simulation software of cylinder movement based on Visual Studio and Visual Component （3D Create） is developed to calculate thevelocity, accel- eration and movement time of the cylinders during the running of the assembly line. Comparison results of cylinder＇s movement time under different intake air and displacement show that the mathematical model of cylinder movement based on aerodynamic is more accurate and the degree of fittingis 0.9846, which proves the effectiveness of the combined simulation software of cylinder movement. By the cylinder movement modeling method based on aerodynamic, accurate value of takt and the debug parameters can be calculated as a reference for the designers and debuggers of the cylinder-driven assembly lines.

关键词： Aerodynamics Thermodynamics Cylindercharacteristic Combined simulation

Neural decoding based on probabilistic neural network

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Journal of Zhejiang University-Science B(Biomedicine & Biotechnology) 2010年第4期11卷 298-306页

作者： Yi YU Shao-min zhang Huai-jian zhang Xiao-chun LIU Qiao-sheng zhang Xiao-xiang ZHENG jian-hua DAI Qiushi Academy for Advanced Studies Zhejiang University Hangzhou 310027 China College of Biomedical Engineering and Instrument Science Zhejiang University Hangzhou 31002 7 China Key Laboratory of Biomedical Engineering of Ministry of Education Zhejiang University Hangzhou 310027 China College of Computer Science and Technology Zhejiang University Hangzhou 310027 China

Brain-machine interface (BMI) has been developed due to its possibility to cure severe body paralysis. This technology has been used to realize the direct control of prosthetic devices,such as robot arms,computer cursors,and paralyzed muscles. A variety of neural decoding algorithms have been designed to explore relationships between neural activities and movements of the limbs. In this paper,two novel neural decoding methods based on probabilistic neural network (PNN) in rats were introduced,the PNN decoder and the modified PNN (MPNN) decoder. In the ex-periment,rats were trained to obtain water by pressing a lever over a pressure threshold. Microelectrode array was implanted in the motor cortex to record neural activity,and pressure was recorded by a pressure sensor synchronously. After training,the pressure values were estimated from the neural signals by PNN and MPNN decoders. Their per-formances were evaluated by a correlation coefficient (CC) and a mean square error (MSE). The results show that the MPNN decoder,with a CC of 0.8657 and an MSE of 0.2563,outperformed the traditionally-used Wiener filter (WF) and Kalman filter (KF) decoders. It was also observed that the discretization level did not affect the MPNN performance,indicating that the MPNN decoder can handle different tasks in BMI system,including the detection of movement states and estimation of continuous kinematic parameters.

关键词： Brain-machine interfaces (BMI) Neural decoding Probabilistic neural network (PNN) Microelectrode array

Sealing properties and structure optimization of packer rubber under high pressure and high temperature

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Petroleum Science 2019年第3期16卷 632-644页

作者： Wen-jian Lan Han-Xiang Wang Xin zhang sheng-Shan Chen College of Mechanical and Electronic Engineering China University of Petroleum

During hydraulic fracturing operations of low-permeability reservoirs,packers are the key component to ensure the success of multistage *** enable sections of the wellbore to be sealed off and separately fractured by hydraulic pressure,one at a time,while the remainder of the wellbore is not ***,reliable sealing properties of the packer rubber are required to meet the high-pressure and high-temperature(HPHT)conditions of reservoirs(such as 70 MPa and 170 ℃).In this study,the structures of the packer rubber with two different materials are optimized numerically by ABAQUS and validated by *** optimization process starts from the packer rubber with a conventional structure,and then,the weakest spots are identified by ABAQUS and improved by slightly varying its *** process is iterative,and the final optimized structure of a single rubber barrel with expanding back-up rings is *** the structure of three rubber barrels with metallic protective covers,both HNBR and AFLAS fail under HPHT *** the final optimized structure,the packer rubber made of AFLAS can work better under HPHT than that made of HNBR which ruptures after *** results show that the optimized structure of a single rubber barrel with expanding back-up rings and the material AFLAS are a good combination for the packer rubber playing an excellent sealing performance in multistage fracturing in horizontal wells.

关键词： Packer rubber Sealing property Structure optimization Hydrogenated nitrile-butadiene rubber (HNBR) AFLAS rubber