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| 1 | Effect of calcining temperature and time on the characteristics of Sb-doped SnO_2 nanoparticles synthesized by the sol-gel method显示文摘Spherical Sb-doped SnO2 (ATO) nanoparticles were synthesized by the sol-gel route, employing SnCl4·5H2O and SbCl3 as precursors in an ethanol solution. The influences of the calcining temperature and calcining time on the crystallite size, crystallinity, lattice parameters, lattice distortion ratio and the resistivity of the ATO nanoparticles were synthetically investigated. The results suggested that the ATO nanoparticles were crystallized in a tetragonal cassiterite structure of SnO2 with a highly (110)- plane-preferred orientation. The calcining temperature had a dominating effect on the crystallite size, crystallinity, lattice distortion ratios and resistivity of the ATO. As the calcining temperature increased, the average crystallite size increased, the crystallinity was promoted accompanied by a decrease in the lattice distortion ratio and a corresponding decrease in the resistivity of the ATO. X-ray diffraction (XRD) and Fourier transform infrared spectrophotometer (FTIR) analysis revealed that Sb ions could not entirely supplant the Sn ions in the SnO2 lattice for a calcining time of less than 0.5 h, even at a calcining temper- ature of 1000°C. The ATO nanoparticles calcined at 1000°C for 3.0h possessed the lowest resistivity of 10.18Ωcm. | Xiaohua Zhong Baoping Yang Xiaoliang Zhang Junhong Jia Gewen Yi | 2012 | Particuology2012，10，3： | 8 |
| 2 | Heat-induced Internal Strain Relaxation and its Effect on the Microstructure of Polyacrylonitrile-based Carbon Fiber显示文摘The transformation of the internal strain and its effect on the microstructure of polyacrylonitrile-based carbon fiber during the high-temperature graphitization were investigated.The internal compressive strain within the carbon turbostratic structure was confirmed through a careful analysis by wide-angle X-ray diffraction and Raman spectroscopy.Heat-induced strain/stress relaxation along the fiber axis was observed and was found to have a profound effect on the structure of both the crystallites and microvoids.The results indicated that,the relaxation of residual strain changed the graphite layers from a wrinkled and distorted morphology to a straight and smooth one,and consequently led the crystallites to stack closely and orderly with increasing stack height.The strain relaxation also changed the morphology of crystallites and microvoids,resulting in an anisotropic growth for the latters. | Denghua Li Chunxiang Lu Gangping Wu Yu Yang Zhihai Feng Xiutao Li Feng An Baoping Zhang | 2014 | Journal of Materials Science & Technology2014，30，10： | 5 |
| 3 | One-step uniform growth of magnesium hydride nanoparticles on graphene显示文摘A simple solvent-free method to synthesize MgH_2 nanoparticles(MgH_2NPs) uniformly grown on graphene nanosheets(GNs) has been reported in this paper. Based on the formation of MgH_2 by di-n-butylmagnesium((C_4H_9)_2Mg) thermal decomposition under hydrogen pressure, the GNs were added as matrix to hinder the agglomeration and growing of MgH_2NPs. The fabricated MgH_2/GNs nanocomposites, in which MgH_2 NPs were homogenously growing in the graphene matrix, have been synthesized by the favorable adsorption energy between(C_4H_9)_2Mg and GNs. Resulting from the one-step solvent-free route, the generated MgH_2 NPs shows high hydrogen capacity and steady hydriding and dehydriding properties, without the interference of the synthetic medium. At the same time, the size of the fabricated MgH_2NPs can be controlled by adjusting the mass ratio of MgH_2 to graphene, the various hydrogen pressure and temperature. Attributed to smaller size effect, well uniform distribution of high density MgH_2NPs, and the agglomeration blocking ability of graphene,the MgH_2/GNs-40 wt% exhibits the favorite hydrogen storage performance. | Yuqin Huang Guanglin Xia Jie Chen Baoping Zhang Qian Li Xuebin Yu | 2017 | Progress in Natural Science:Materials International2017，27，1： | 5 |
| 4 | Antiplane response of two scalene triangular hills and a semi-cylindrical canyon by incident SH-waves显示文摘Antiplane response of two scalene triangular hills and a semi-cylindrical canyon by SH-waves is studied using wave function expansion and complex function method. Firstly, the analytical model is divided into three parts, and the displacement solutions of wave fields are constructed based on boundary conditions in the three regions. Three domains are then conjoined to satisfy the 'conjunction' condition at shared boundary. In addition, combined with the zero-stress condition of semi-cylindrical canyon, a series of infinite algebraic equations for the problem are derived. Finally, numerical examples are provided and the influence of different parameters on ground motion is discussed. | Yang Zailin Xu Huanan Hei Baoping Zhang Jianwei | 2014 | Earthquake Engineering and Engineering Vibration2014，13，4： | 4 |
| 5 | Adaptive image enhancement algorithm based on fuzzy entropy and human visual characteristics显示文摘To overcome the shortcomings of the Lee image enhancement algorithm and its improvement based on the logarithmic image processing(LIP) model, this paper proposes what we believe to be an effective image enhancement algorithm. This algorithm introduces fuzzy entropy, makes full use of neighborhood information, fuzzy information and human visual characteristics.To enhance an image, this paper first carries out the reasonable fuzzy-3 partition of its histogram into the dark region, intermediate region and bright region. It then extracts the statistical characteristics of the three regions and adaptively selects the parameter αaccording to the statistical characteristics of the image's gray-scale values. It also adds a useful nonlinear transform, thus increasing the ubiquity of the algorithm. Finally, the causes for the gray-scale value overcorrection that occurs in the traditional image enhancement algorithms are analyzed and their solutions are proposed.The simulation results show that our image enhancement algorithm can effectively suppress the noise of an image, enhance its contrast and visual effect, sharpen its edge and adjust its dynamic range. | WANG Baoping MA Jianjun HAN Zhaoxuan ZHANG Yan FANG Yang GE Yimeng | 2018 | Journal of Systems Engineering and Electronics2018，29，5： | 3 |
| 6 | Design and Accuracy Analysis of a Metamorphic CNC Flame Cutting Machine for Ship Manufacturing显示文摘The current research of processing large size fabrication holes on complex spatial curved surface mainly focuses on the CNC flame cutting machines design for ship hull of ship manufacturing. However, the existing machines cannot meet the continuous cutting requirements with variable pass conditions through their fixed configuration, and cannot realize high-precision processing as the accuracy theory is not studied adequately. This paper deals with structure design and accuracy prediction technology of novel machine tools for solving the problem of continuous and high-precision cutting. The needed variable trajectory and variable pose kinematic characteristics of non-contact cutting tool are figured out and a metamorphic CNC flame cutting machine designed through metamorphic principle is presented. To analyze kinematic accuracy of the machine, models of joint clearances, manufacturing tolerances and errors in the input variables and error models considering the combined effects are derived based on screw theory after establishing ideal kinematic models. Numerical simulations, processing experiment and trajectory tracking experiment are conducted relative to an eccentric hole with bevels on cylindrical surface respectively. The results of cutting pass contour and kinematic error interval which the position error is from –0.975 mm to +0.628 mm and orientation error is from –0.01 rad to +0.01 rad indicate that the developed machine can complete cutting process continuously and effectively, and the established kinematic error models are effective although the interval is within a ‘large' range. It also shows the matching property between metamorphic principle and variable working tasks, and the mapping correlation between original designing parameters and kinematic errors of machines. This research develops a metamorphic CNC flame cutting machine and establishes kinematic error models for accuracy analysis of machine tools. | HU Shenghai ZHANG Manhui ZHANG Baoping CHEN Xi YU Wei | 2016 | Chinese Journal of Mechanical Engineering2016，29，5： | 3 |
| 7 | Effect of repetitive transcranial magnetic stimulation on cigarette smoking in patients with schizophrenia显示文摘 | Wanli HUANG Fang SHEN Jiangtao ZHANG Baoping XING | 2016 | 上海精神医学2016，28，6： | 3 |
| 8 | Curing mechanism of alkaline phenolic resin with organic ester显示文摘To study the curing mechanism of alkaline phenolic resin with organic ester, three esters were chosen to react with three systems — alkaline phenolic resin, potassium hydroxide aqueous solution containing phenol, and potassium hydroxide aqueous solution. The variations of pH, heat release and gel pH during the reactions were monitored and measured. Infrared spectroscopy(IR) and thermal gravity analysis(TG) techniques were used to characterize the curing reaction. It was found that organic ester is only partially hydrolyzed and resin can be cured through organic ester hydrolysis process as well as the reaction with redundant organic ester. The sequential curing mechanism of alkaline phenolic resin cured by organic ester was identified as follows: a portion of organic ester is firstly hydrolyzed owing to the effect of the strong alkaline; the gel is then formed after the pH decreases to about 10.8-10.88, meanwhile, the redundant organic ester(i.e. non-hydrolysis ester) starts the curing reaction with the resin. It has also been found that the curing rate depends on the hydrolysis velocity of organic ester. The faster the hydrolysis speed of the ester, the faster the curing rate of the resin. | Huang Renhe Wang Yanmin Zhang Baoping | 2014 | China Foundry2014，11，5： | 3 |
| 9 | Derivation and characterization of human embryonic stem cell lines from poor quality embryos显示文摘Poor quality embryos discarded from in vitro fertilization (IVF) laboratories are good sources for deriving human embryonic stem cell (hESC) lines. In this study, 166 poor quality embryos donated from IVF centers on day 3 were cultured in a blastocyst medium for 2 days, and 32 early blastocysts were further cultured in a blastocyst optimum culture medium for additional 2 days so that the inner cell masses (ICMs) could be identified and isolated easily. The ICMs of 17 blastocysts were isolated by a mechanical method, while those of the other 15 blastocysts were isolated by immunosurgery. All isolated ICMs were inoculated onto a feeder layer for subcultivation. The rates of ICM at- tachment, primary ICM colony formation and the efficiency of hESC derivation were similar between the ICMs isolated by the two methods (P>0.05). As a result, four new hESC lines were established. Three cell lines had normal karyotypes and one had an unbalanced Robertsonian translocation. All cell lines showed normal hESC characteristics and had the differentiation ability. In conclusion, we established a stable and effective method for hESC isolation and culture, and it was confirmed that the mechanical isolation was an effective method to isolate ICMs from poor embryos. These results further indicate that hESC lines can be derived from poor quality embryos discarded by IVF laboratories. | Weiqiang Liu, Yifei Yin, Xiaolin Long, Yumei Luo, Yonghua Jiang, Wenhong Zhang, Hongzi Du, Shaoying Li, Yuhong Zheng, Qing Li, Xinjie Chen, Baoping Liao, Guohong Xiao, Weihua Wang, Xiaofang Sun Guangzhou Key Laboratory of Reproductive and Genetics Institute of Gynecology and Obstetrics, The Third Affiliated Hospital of Guangzhou Medical College, Guangzhou 510150, China | 2009 | Journal of Genetics and Genomics2009，36，4： | 3 |
| 10 | Heavy ion and X-ray irradiation alter the cytoskeleton and cytomechanics of cortical neurons显示文摘Heavy ion beams with high linear energy transfer exhibit more beneficial physical and biological performance than conventional X-rays, thus improving the potential of this type of radiotherapy in the treatment of cancer. However, these two radiotherapy modalities both cause inevitable brain injury. The objective of this study was to evaluate the effects of heavy ion and X-ray irradiation on the cytoskeleton and cytomechanical properties of rat cortical neurons, as well as to determine the potential mechanism of neuronal injury after irradiation. Cortical neurons from 30 new-born mice were irradiated with heavy ion beams at a single dose of 2 Gy and X-rays at a single dose of 4 Gy; subsequent evaluation of their effects were carried out at 24 hours after irradiation. An immunofluorescence assay showed that after irradiation with both the heavy ion beam and X-rays, the number of primary neurons was significantly decreased, and there was evidence of apoptosis. Radiation-induced neuronal injury was more apparent after X-irradiation. Under atomic force microscopy, the neuronal membrane appeared rough and neuronal rigidity had increased. These cell changes were more apparent following exposure to X-rays. Our findings indicated that damage caused by heavy ion and X-ray irradiation resulted in the structural distortion and rearrangement of the cytoskeleton, and affected the cytomechanical properties of the cortical neurons. Moreover, this radiation injury to normal neurons was much severer after irradiation with X-rays than after heavy ion beam irradiation. | Yuting Du Jie Zhang Qian Zheng Mingxin Li Yang Liu Baoping Zhang Bin Liu Hong Zhang Guoying Miao | 2014 | Neural Regeneration Research2014，9，11： | 3 |
| 11 | A dynamic Bayesian networks modeling of human factors on offshore blowouts显示文摘 | Baoping Cai Yonghong Liu Yunwei Zhang Qian Fan Zengkai Liu Xiaojie Tian | 2013 | Journal of Loss Prevention in the Process Industries2013，，4： | 2 |
| 12 | Multi-fluid Eulerian simulation of binary particles mixing and gas–solids contacting in high solids-flux downer reactor equipped with a lateral particle feeding nozzle显示文摘The performance of binary particles mixing and gas-solids contacting,which is considered qualitatively to have a significant influence on the heat transfer in internal heated circulating fluidized beds,is carefully investigated by means of a numerical approach in the newly developed high solids-flux downer lignite pyrolyzer(φ0.1 m×6.5 m).Since binary particles are used in this system,a reasonably validated 3 D,transient,multi-fluid model,in which three heat transfer modes relating to the convection,conduction and radiation are considered,is adopted to simulate the flow behavior,temperature profiles as well as volatile contents.The simulation results showed that the solids stream impinges the left wall surface initially and turns towards the right wall in the further downward direction and then shrinks during this process resulting in that the solids concentrate a little more at the central region.In the further downward section of the downer,the particle flow disperses near the right wall and develops uniformly.Meanwhile,the coal phase is slowly heated in the downer and it is found that most of the heat absorbed by the coal is from the convection heat transfer mode.To explore the heat transfer mechanism more quantitatively,two indexes(mixing index and contacting index)are proposed,and it is found that the mixing index initially increased fast and later remained at a relatively flat state.For the contact index,it shows a trend with a first rising and then falling,finally rising continuously.Also,it is found that the convection heat transfer is closely correlated to the contacting status of gas-coal which indicates that the improving of the gas-coal contacting efficiency should be an effective way to strengthen the coal particle heating process. | Qiang Zheng Jingxuan Yang Wenhao Lian Baoping Zhang Xueer Pan Zhonglin Zhang Xiaogang Hao Guoqing Guan | 2021 | Chinese Journal of Chemical Engineering2021，34，7： | 2 |
| 13 | Genetic Analysis of Human Adenovirus Type 7 Strains Circulating in Different Parts of China显示文摘To investigate the molecular epidemiology and genetic variation of human adenovirus type 7(HAdV-7)in children with acute respiratory infections(ARI)in China.HAdV-7-positive respiratory samples collected from children with ARI in Beijing,Shijiazhuang,Wenzhou and Guangzhou from 2014–2018 were selected for gene amplification and sequence analysis.Fifty-seven HAdV-7 clinical strains with hexon,penton base and fiber gene sequences were obtained.Meanwhile17 strains were selected randomly from different cities for whole genome sequencing.Phylogenetic and variation analyses were performed based on the obtained sequences,HAdV-7 prototype strain Gomen(AY594255),vaccine strains(AY495969 and AY594256)and representative sequences of strains.The phylogenetic trees constructed based on whole genome sequences,major capsid protein genes(hexon,penton base and fiber)and the early genes(E1,E2,E3 and E4)were not completely consistent.The HAdV-7 strains obtained in this study always clustered with most of the circulating strains worldwide from the 1980 s to the present.Compared with the HAdV-7 prototype strain Gomen(AY594255),some amino acid mutations in loop1 and loop2 of hexon and the RGD loop region of the penton base gene were observed.Recombination analysis showed that partial regions of 55 k Da protein and 100 kDa hexon-assembly associated protein genes among all HAdV-7 strains in this study were from HAdV-16 and HAdV-3,respectively.Our study demonstrated the molecular evolution characteristics of HAdV-7 strains circulating in China and provided basic reference data for the prevention,control and vaccine development of HAdV-7. | Yali Duan Changchong Li Li Deng Shuhua An Yun Zhu Wei Wang Meng Zhang Lili Xu Baoping Xu Xiangpeng Chen Zhengde Xie | 2021 | Virologica Sinica2021，36，3： | 2 |
| 14 | A multi-center study on Molecular Epidemiology of Human Respiratory Syncytial Virus from Children with Acute Lower Respiratory Tract Infections in the Mainland of China between 2015 and 2019显示文摘Human respiratory syncytial virus(RSV) is a major pathogen of acute lower respiratory tract infection among young children. To investigate the prevalence and genetic characteristics of RSV in China, we performed a molecular epidemiological study during 2015–2019. A total of 964 RSV-positive specimens were identified from 5529 enrolled patients during a multi-center study. RSV subgroup A(RSV-A) was the predominant subgroup during this research period except in2016. Totally, 535 sequences of the second hypervariable region(HVR-2) of the G gene were obtained. Combined with182 Chinese sequences from GenBank, phylogenetic trees showed that 521 RSV-A sequences fell in genotypes ON1(512),NA1(6) and GA5(3), respectively;while 196 RSV-B sequences fell in BA9(193) and SAB4(3). ON1 and BA9 were the only genotypes after December 2015. Genotypes ON1 and BA9 can be separated into 10 and 7 lineages, respectively. The HVR-2 of genotype ON1 had six amino acid changes with a frequency more than 10%, while two substitutions H258 Q and H266 L were co-occurrences. The HVR-2 of genotype BA9 had nine amino acid substitutions with a frequency more than10%, while the sequences with T290 I and T312 I were all from 2018 to 2019. One N-glycosylation site at 237 was identified among ON1 sequences, while two N-glycosylation sites(296 and 310) were identified in the 60-nucleotide duplication region of BA9. To conclusion, ON1 and BA9 were the predominant genotypes in China during 2015–2019. For the genotypes ON1 and BA9, the G gene exhibited relatively high diversity and evolved continuously. | Xiangpeng Chen Yun Zhu Wei Wang Changchong Li Shuhua An Gen Lu Rong Jin Baoping Xu Yunlian Zhou Aihuan Chen Lei Li Meng Zhang Zhengde Xie | 2021 | Virologica Sinica2021，36，6： | 2 |
| 15 | Experimental studies of impulse breakdown delay characteristics of soil显示文摘 | HE Jinliang ZHANG Baoping ZENG Rong | 2011 | IEEE Transactions on Power Delivery2011，26，3： | 1 |
| 16 | Bioleaching mechanism of Co and Li from spent lithium-ion battery by themixed culture of acidophilic sulfur-oxidizing and iron-oxidizing bacteria显示文摘 | Xin Baoping Zhang Di Zhang Xian | 2009 | Bioresource Technology2009，100，： | 1 |
| 17 | Investigation of Discharge Characteristic of Shadow Mask PDP显示文摘 | Tu Yan Wang Baoping Zhang Xiong | 2005 | IMID052005，，： | 1 |
| 18 | Investigation of breakdown characteristic of a novel plasma display panel discharge cell with rotationally symmetric structure 显示文摘 | Tu Yan Zhang Xiong Wang Baoping | 2002 | Journal of Vacuum Science2002，20，1： | 1 |
| 19 | Parametric Narrow-Band InISAR 3D Imaging Based on Compressed Sensing显示文摘For muti-scatter point target and undersampled data,tradintional imaging method has a poor precision for imaging result and spin angular velocity.In view of the above problems,this paper proposes a narrow-band Interferometric inverse synthetic aperture radar(InISAR)3-dimensional(3D)Compressed sensing imaging method based on the joint spin angle velocity error parameter estimation.First,a sparse model of narrow-band spin target is constructed.Then,the image entropy is used as the criterion function to search the optimal angle velocity by the joint reconstruction iteration.Finally,the image of the target is obtained by interference processing.The simulation results show that compared with the traditional method,the estimation of spin angular velocity and the imaging result are more accurate in proposed method. | WANG Baoping ZHANG Yan FANG Yang SONG Zuxun | 2020 | Chinese Journal of Electronics2020，29，3： | 1 |
| 20 | A method of monitoring gas saturation in carbon dioxide injection heavy oil reservoirs by pulsed neutron logging technology显示文摘A method is proposed to characterize the fast neutron scattering cross-section ( s f) quantitatively by the combina-tion of inelastic gamma rays and captured gamma rays, so as to realize the gas saturation evaluation of CO_(2)-injected heavy oilreservoirs based on the three-de tector pulsed neutron logging technology. Factors influencing of the evaluation effect of thismethod are analyzed and the effectiveness of this method is verified by a simulation example. By using the Monte Carlo simu-lation method and the physical model of bulk-volume rock, the relationship between s f and CO_(2) saturation is studied, and thesaturation interpretation model is established. The influences of formation temperature and pressure, heavy oil density, bore-hole fluid and reservoir methane content on the evaluation results of CO_(2) saturation are analyzed. The results show that thecharacterization of s f by the combination of secondary gamma information can eliminate the influence of formation lithology,borehole fluid and methane content are the main factors affecting the quantitative monitoring of CO_(2) saturation, and the ef-fects of formation temperature and pressure and heavy oil density are negligible. The simulation example verified the feasibilityof the method for evaluating the CO_(2) saturation of CO_(2)-injected heavy oil reservoirs. | FAN Jilin ZHANG Feng TIAN Lili LIANG Qixuan ZHANG Xiaoyang FANG Qunwei LU Baoping LI Xianghui | 2021 | Petroleum Exploration and Development2021，48，6： | 1 |
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