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| 1 | Restudies on Body Surface of Dung Beetle and Application of Its Bionics Flexible Technique显示文摘A scanning electron microscope was used to observe the structures of the setae on the surface of a dung beetle Copris ochus, Motschulsky. There are lots of setae on the body surface, especially on the ventral part surface and lateral to the legs which are different in size, arrangement and shape. These setae have different lengths and many thorns on the whole seta. The top ends of these setae stand up without furcations which direct uprightly towards the surface of the touched soil. By the method of removing these setae, getting the insect weight before and after digging into the dung we affirm farther that the setae on the beetle body surface form the anti-stick and non-adherent gentle interface. The soil machines and components made by imitating the gentle body surface of beetles have favorable non-adherent results. | Jiurong Sun 1, Jianqiao Li 2, Hong Cheng 1, Zhendong Dai 3, Luquan Ren 2 1.College of Life Sciences, Peking University, Beijing, 100871,P.R. China 2.Key Laboratory of Terrain-Machine Bionics Engineering (Ministry of Education,China), Jilin University at Nanling Campus, Changchun, 130022,P.R.China 3.College of Mechanical and Electrical Engineering, Nanjing University of Aeronautics and Astronautics, Nanjing, 210016,P.R.China | 2004 | Journal of Bionic Engineering2004，1，1： | 12 |
| 2 | Comparison of LaFeO_3,La_(0.8)Sr_(0.2)FeO_3,and La_(0.8)Sr_(0.2)Fe_(0.9)CO_(0.1)O_3 perovskite oxides as oxygen carrier for partial oxidation of methane显示文摘LaFeO 3, La 0.8 Sr 0.2 FeO 3, 和 La 0.8 Sr 0.2 Fe 0.9 公司 0.1 O 3 perovskite 氧化物被连续流动反应和顺序的氧化还原作用反应作为为当气体的氧不在时的甲烷的部分氧化的氧搬运人调查。甲烷被 perovskite 氧化物的氧种类当气体的氧不在时与高选择氧化到 syngas。顺序的氧化还原作用反应表明在氧化还原作用反应的结构的稳定性和连续的氧供应在 La 0.8 Sr 0.2 Fe 0.9 公司 0.1 O 3 氧化物,当时 LaFeO 3 和 La 0.8 Sr 0.2 FeO 3 展出了优秀结构的稳定性和连续的氧供应。 | Xiaoping Dai Changchun Yu Qiong Wu | 2008 | Journal of Natural Gas Chemistry2008，17，4： | 4 |
| 3 | Numerical modeling of radionuclide migration in porous media with nonequilibrium sorption显示文摘Numericalmodelingofradionuclidemigrationinporousmediawithnonequilibriumsorption￥ChenJiajun;DaiJie(DepartmentofEnvironmentalEn... | Chen Jiajun Dai Jie(Department of Environmental Engineering,Tsinghua University,Beijing 100084,China)(Tianjin Institute of Geological Investigation and Research,Tianjin 300191,China)Xu Zhaoyi Tian Kaiming(Changchun University of Earth Sciences,Changchun 1 | 1996 | Journal of Environmental Sciences1996，8，1： | 3 |
| 4 | H_2-induced CO adsorption and dissociation over Co/Al_2O_3 catalyst显示文摘吸附的公司的激活是在公司加氢的重要的步。从有 H 2 和 syngas 的预先吸附的公司的 TPSR 的结果建议 H 2 的存在增加了公司吸附的数量并且加速了公司分离。H 2 首先被吸附,并且激活在金属地点上形成 H * ,然后与碳的种类反应了。为公司 2 形成的氧种类主要面对氢是哦反应了与的 *, 经由公司 *+OH*→
随后吸附了公司公司 *2+H* ;然而,直接公司分离没在公司加氢被排除。C 的分离—O 债券由一致机制面对 H 2 继续了,它经由公司 *+2H*→
在表面上帮助了吸附的公司的 Boudourd 反应CH *+OH* 。从吸附的公司的表面种类(CH ) 的形成是与表面氢的参予显示了继续了,在 Fischer-Tropsch 合成的起始的步被赞成。 | Xiaoping Dai Changchun Yu | 2008 | Journal of Natural Gas Chemistry2008，17，4： | 3 |
| 5 | Characterization and catalytic performance of CeO_2-Co/SiO_2 catalyst for Fischer-Tropsch synthesis using nitrogen-diluted synthesis gas over a laboratory scale fixed-bed reactor显示文摘CeO 2-Co/SiO2 催化剂上的公司加氢的表面种类用温度的技术被调查规划反应和短暂反应方法。结果显示 H 2 O 和公司 2 是为表面氧种类的竞争反应, CH 4 一步一步地经由碳种类的加氢被生产,并且 C 2 产品被表面活跃的碳种类的聚合形成(-CH2-) 。氢帮助了表面碳种类的加氢是的公司的分离在在 CeO 2-Co/SiO2 上的公司的加氢的限制率的步催化剂。全部的压力的调查,气体时时,空间速度(GHSV ) ,和在一个实验室规模改正床反应堆上把充满氮的合成气体用作化工物品的产品分发显示了那个全部的压力, GHSV 在 CeO 2-Co/SiO2 的催化表演上有重要效果催化剂。热的移动和反应温度的控制是极其关键的步,它要求了更低的 GHSV 和适当公司变换避免催化剂的释放。充满氮的合成气体的化工物品是有利的增加公司的变换,但是有向轻烃的产品分发的移动。充满氮的合成气体为为遥远的天然气的利用的英尺合成是可行的。 | Xiaoping Dai Changchun Yu | 2008 | Journal of Natural Gas Chemistry2008，17，1： | 2 |
| 6 | Hydrothermal Synthesis and Characterization of Perovskite PbTiO_3 Powders from Different Precursors显示文摘IntroductionPerovskite(PE)phasePbTiO3isawel-knownferroelectricmaterialwithexcelentdi-electric,pyroelectricandpiezoelectricpro... | CHEN Dai rong and XU Ru ren ** (Department of Chemistry, Jilin University, Changchun, 130023) | 1998 | Chemical Research in Chinese Universities1998，14，3： | 2 |
| 7 | Mechanism for the Nanometer Scale Modification on HOPG Surface by Scanning Tunneling Microscope显示文摘A technique applying voltage across the tunnel junction for wnting permanent features on graphite with lines about 10nm wiidth using our home-built scanning tunneling microscope has been presented.Multiple-tip effects while modifying the surface are often met.The phenomciifi are explained in terms of the strong electric field existing at the junction between the tip an<7 the surface.In addition,the shape of the structure indented by the tip is in agreement with that of the tip. | WANG Zhonghuai DAI Changchun ZHANG Pingchen HUANG Guizhen LI Renli GUO Yi BAI Chunli | 1993 | Chinese Physics Letters1993，10，9： | 2 |
| 8 | In vitro inhibition of CSFV replication by multiple siRNA expression显示文摘 | Jiangnan Li Yajuan Dai Shuai Liu Huancheng Guo Tiedong Wang Hongsheng Ouyang Changchun Tu | 2011 | Antiviral Research2011，，2： | 1 |
| 9 | Conformation of 1,2-Dimethoxyethane in Water显示文摘To understand the conformation of 1,2-dimethoxyethane (DME) in water, a system of two kinds of molecules, DME and H2O, was focused. The interaction of various conformers of DME with water was studied by means of ab initio molecular orbital calculation with 6-31G(d)basis set. It is shown that there are two forms of interactions between the two molecules in the sys tem, the close touched (H2O attaches to the two oxygen atoms of DME) and the open touched (H2O attaches to one oxygen atom of DME) structures. The conformation of DME is remark ably influenced by the interactions. Instead the ttt conformer is preferred in the gas state, with a close touched H2O the tgt conformer becomes the most stable one. The obtained hydration ener gies show that the stabilized order of DME conformers by water is tgt>tgg'>ttt. | LIU Yue~(1,3**), YANG Xiao-zhen~2, DAI Bai-qing~(3,1), SU Zhong-min~4 and WANG Qi~1 (1. Institute of Opto-electronics, Harbin Institute of Technology, Harbin 150001, P.R. China 2. Polymer Physics Laboratory, Institute of Chemistry, Academia Sinica, Beijing 100080, P. R. China 3. Department of Chemistry, Harbin Normal University, Harbin 150080, P.R. China 4. Department of Chemistry, Northeast Normal university, Changchun 130024, P. R. China) To whom correspondence should be addressed. | 2001 | Chemical Research in Chinese Universities2001，17，3： | 1 |
| 10 | The impacts of economic restructuring and technology upgrade on air quality and human health in Beijing-Tianjin-Hebei region in China显示文摘In this study, we have analyzed possible policy options to improve the air quality in an industrialized region—Beijing, Tianjin and Hebei (BTH) in China. A comprehensive model framework integrating GAINS-China, GEOS-Chem, and IMED/HEL is established to investigate the impacts of various policies on air pollution and health effects. The model establishes a data interface between economic input/output data and the emission inventory of atmospheric pollutants in the BTH region. Based on in-depth analyses of pollutant emission standards, industrial structure, pollution-intensive industries, and emission intensities in BTH and Pearl River Delta, several scenarios are constructed to explore the effectiveness of policy pathways in improving air quality in the BTH region. These scenarios include two categories: the category of “Industrial Technology Upgrade Policy” scenarios that focuses on reducing the emission intensity of industries vs. that of “Industrial Structure Adjustment Policy” scenarios that focuses on adjusting the proportion of industrial value-added. Our results show that the policy path of industrial technology upgrading can be effective and feasible, while economic structure adjustment shows complex and mixed effectiveness. We also find that the proposed policies and measures will be efficient to reduce pollution of primary pollutants and fine particles, but may not effectively mitigate ambient ozone pollution. Ozone pollution is projected to become increasingly severe in BTH, placing a challenge to pollution mitigation strategies that requires further adjustments to address it. | Chao Liu Hancheng Dai Lin Zhang Changchun Feng | 2019 | Frontiers of Environmental Science & Engineering2019，13，5： | 1 |
| 11 | One-Step interpolation Predictive Vector Quantization of LSP Parameters显示文摘One-StepinterpolationPredictiveVectorQuantizationofLSPParameters￥BaoChangchun(DepartmentofTelecommunicationEngineering,Changc... | Bao Changchun(Department of Telecommunication Engineering, Changchun Posts and Telecommunications institUte,Changchun 130012,P.R.China)Dai Yisong(Department of Electronic Engineering,Jinn University of Technology,Changchun 130022,P.R.China) | 1996 | The Journal of China Universities of Posts and Telecommunications1996，3，1： | 1 |
| 12 | LOW-FREQUENCY LOW-NOISE CIRCUITS DESIGN USING AN E_n-I_n MODEL显示文摘In view of the limitations of a Rn-Gn model in the low frequency range and the defects of an En-In model in common use now, this paper builds a complete En-In model according to the theory of random harmonic. The parameters for the low-noise design such as the equivalent input noisy voltage Ens, the optimum source impedance Zsopt and the minimum noise figure Fmin can be calculated accurately by using this En-In model because it considers the coherence between the noise sources fully. Moreover, this paper points out that it will cause the maximum 30% miscalculation when neglecting the effects of the correlation coefficient 7. Using the series-series circuits as an example, this paper discusses the methods for the En-In noise analysis of electronic circuits preliminarily and demonstrates its correctness through the comparison between the simulated and measured results of the minimum noise figure Fmin of a single current series negative feedback circuit. | Wang Jun (China Academy of Engineering and Physics, Chengdu 610003)Dai Yisong(Jilin University of Technology, Changchun 130025) | 1999 | Journal of Electronics(China)1999，16，1： | 1 |
| 13 | Study and Application of Health Care Measure in Tunnel Construction of Qinghai-Tibet Railway显示文摘In this paper we studied a key control project in QinghaiTibet Railway construction. The project included the oxygen supplying system, the ventilation and air changing system measure of tunnel environment, monitoring and comprehensive treatment on airborne dust and toxic and harmful gases, hygiene intervention with builders in Fenghuoshan Tunnel construction. In the worst sector of the whole Qinghai-Tibet Railway line, we acquired a good achievement of the lowest incidence rate of altitude disease. Hence the Fenghuoshan Tunnel was joined up in advance, which set up a new record for frozen soil tunnel construction at high altitudes. The application of health care measure for tunnel construction promised rapid results. | Ding Shouquan Liu Yingshu Jia Jianhou Liang Bozhou Qiu Changchun Zhou Wenyu Dai Ruichen Li Dan Yang Xiaolan Li Yi Tang Wei Zhu Yongquan | 2006 | 工程科学(英文版)2006，4，2： | 0 |
| 14 | A REAL-TIME IMPLEMENTATION OF 4.2Kb/s CELP SPEECH CODING显示文摘This paper presents a real-time implementation of 4.2Kb/s CELP speech coding on single DSP chip. An algorithm reducing search complexity for adaptive codebook is suggested; the solving method that the parameters are changed into LSP parameters is discussed. The realtime implementation process of this coding on a commercial development board with a single TMS320C30 is described. | Bao Changchun Dai Yisong Fan Changxin(information Science Institute, Xidian University, Xi’an 710071) (Dept. of Electronic Eng., Jilin University of technology 130025) | 1997 | Journal of Electronics(China)1997，14，1： | 0 |
| 15 | TWO KINDS OF PITCH PREDICTORS IN SPEECH COMPRESSING CODING显示文摘This paper studies two kinds of methods for pitch predictor in speech compressing coding, i.e., open-loop and closed-loop structures. Some of simplified approaches for solving pitch predictor equation are suggested, and the performances are compared under several conditions. The computer simulation results are shown. | Bao Changchun Dai Yisong Fan Changxin(Xidian University, Xi’an 710071) (Jilin University of technology, Changchun 130025) | 1997 | Journal of Electronics(China)1997，14，3： | 0 |
| 16 | Improved Populating Code-Excited Linear Predictive Coder显示文摘Although CELP coding has provided good quality synthetic speech at medium and low bit rates,the computation of an exhaustive search for stochastic codebook is extremely complex. This paper studies the exhaustive search procedure for determining the optimum excitation,and develops an effective search method by using improved populating codebook as excitation source. The computational cost of CELP coder was reduced to 1/26 that of a conventional full-gaussian codebook search. | Bao Changchun Zhao Guoqian (Department of Telecommunication Engineering, Changchun Post and Telecommunication institute, Changchun 130012, P. R. China) Dai Yisong (Department of Electronic Engineering,Jilin University of Technology, Changchun 130012, P. | 1994 | The Journal of China Universities of Posts and Telecommunications1994，1，1： | 0 |
| 17 | Updated Chinese Evaluated Nuclear Parameter Library (CENPL-2)显示文摘An important trend in the evaluation of neutron and charged particle nuclear data, and analyses of experimental results at low energies is the increased use of nuclear reaction theory codes to compute the cross sections, spectra, and angular distributions required by a large variety of applications. As a method of evaluation, such model codes offer, in comparison with simple approaches, many advantages such as the preservation of the energy balance or the coherence of partial cross sections with the total or the reaction cross section. Secondly, theoretical calculations can generate the data for any incident energy, any outgoing angles and energies, but the experimental measurement could never supply all | SUZong-di, FENG Ren-fa, SHI Yi-jin, WANG Shu-nuan, HUANG Zhong-fu, LIU Jian-feng, ZHU Yao-yin, LI Zhi-wen, ZHANG Qi-xin, YANG Xiao-qing, GONG Hui-li, WANG Bin, ZHOU Jian-ming , CHEN Zhen-peng, MA Gong-gui, WAN Hong-sheng, SHI Shu-mei, DAI Neng-xiong, WANG Yu-sheng(Guangxi University, Nanning Guangxi, 530004 Zhengzhou University, Zhengzhou Henan , 450004 Jilin University,Changchun Jilin, 130023 Tsinghua University, Beijing, 100084 Sichuan University, Chengdu Sichuan, 610064 Shaoguan University, Shaoguan Guangdong, 512005) | 2001 | Annual Report of China Institute of Atomic Energy2001，，0： | 0 |
| 18 | Chinese Nuclear Science Basic Data Base(CNSBDB)显示文摘A new research project on 'Development of the Chinese Nuclear Science Basic Database (CNSBDB)for Fundamental Researches of Nuclear Physics and Interrelated Subjects, and Requirements of NuclearPower and Nuclear Technologies Application' has been commenced. The CNSBDB contains thefollowing eight segments: 1) Information on Nuclear Science (INFO); 2) Nuclear Structure Data Base(NSDB); 3) Nuclear Decay Data Base (NDDB); 4) Nuclear Reaction Data Base (NRDB); 5) | SU Zong-di, DAI Neng-xiong, FENG Ren-fa, SHI Yi-jin, ZHOU Jian-ming,WANG Shu-nuan, WANG Yu-sheng, DONG Bao-guo, HUANG Zhong-fu,ZHU Yao-yin,LI Zhi-wen, LIU Jian-feng, ZHANG Ben-ai,ZHANG Qi-xin,YANG Xiao-qing, GONG Hui-li, SHI Shu-mei, MA Gong-gui, WAN Hong-sheng(Shaoguan University, Shaoguan 512005, China Guangxi University, Nanning 530004, China Jilin University, Changchun 130023, China Zhengzhou University, Zhengzhou 450004, China Institute ofApplied Physics and Computational Mathematics, Beijing 100088, China Sichuan University, Chengdu 610064, China) | 2002 | Annual Report of China Institute of Atomic Energy2002，，0： | 0 |
| 19 | DISLOCATION EMISSION AND EQUATION OF ENERGY BARRIERS AT MODEL I CRACK TIP显示文摘The propagation for the model I crack in aluminum single crystal has been directly studied by in-situ TEM observation.The equation of energy barrier of the dislocation building-up and emission at the model I crack tip has been established by means of Peierls-Nabarro dislocation model and starting from angle of energy.By means of calculation,the critical value of spontaneous emission of the dislocations from tip of the model I crack was obtained. | Zou Hongcheng Dai Shujuan Liu Furong Hu Xiangyang Li Changchun | 1996 | Transactions of Nonferrous Metals Society of China1996，6，1： | 0 |
| 20 | Effects of pretreatment and reduction on the Co/Al_2O_3 catalyst for CO hydrogenation显示文摘The purpose of this study was to investigate the effect of preadsorbed CO at different temperatures, calcination temperatures, the combined influence of reduction temperature and time, and pretreatment using hydrogen or syngas as reduc- tion agents on the F-T synthesis (FTS) activity and selectivity of Co/Al2O3 catalyst. The reactivity of the carbon species at higher preadsorption temperature with H2 in TPSR decreased, whereas the carbon-containing species showed higher reactivity over Co/Al2O3 catalyst with low calcination temperature. This agreed well with the order of catalytic activity for F-T syn- thesis on this catalyst. The catalytic activity of the catalyst varied with reduction temperature and time remarkably. CODEX optimization gave an optimum reduction temperature of 756 K and reduction time of 6.2 h and estimated C5+ yield perfectly. The pretreatment of Co/Al2O3 catalyst with different reduction agents (hydrogen or syngas) showed important influences on the catalytic performance. A high CO conversion and C5+ yield were obtained on the catalyst reduced by hydrogen, whereas methane selectivity on the catalyst reduced by syngas was much higher than that on the catalyst reduced by hydrogen. | Xiaoping Dai Changchun Yu | 2008 | Journal of Natural Gas Chemistry2008，17，3： | 0 |
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