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| 1 | Regional disparity in the changes of agricultural land use intensity in China during 1980-2002显示文摘Based on the cost-benefit data (1980–2002) of farm products and China Agriculture Yearbooks, this paper studies the regional disparity in the changes of the agricultural land use in China during the period 1980–2002 from three aspects such as the degree of intensity, the sown area and the abandoned farmland. The results show that: (1) The degree of intensity of land use in the western region during 1980–2000 has a strong uptrend, but in the eastern and central regions the degree of intensity descends obviously and has shown a continuous downtrend since 1997. (2) The total sown area shrinks notably in the eastern region, while it enlarges constantly in the western region. (3) The sown area in the eastern, central and western regions has gone through a similar cyclic process: down (1980–1985)–up (1985–1991)–down (1991–1994)–up (1994–1999)–down (1999–2002). However, there are obvious differences in amplitude variation and tendency among them. The sown area has shrunk in the eastern region and expanded in the central and western regions especially before 1999. (4) The most cases of abandoned farmland are reported in the central region, the second in the eastern region and the least in the western region. The abandonment phenomena chiefly occurred during 1992–1995 in the eastern region, and during 1998–2002 in the central region. | LIU Chengwu LI Xiubin | 2006 | Journal of Geographical Sciences2006，16，3： | 16 |
| 2 | Two Potent α3/5 Conotoxins from Piscivorous Conus achatinus显示文摘每个锥蜗牛生产不同 conotoxins 的混合物并且分泌他们使他们的猎物和食肉动物不能调动。α 3 /5 Conotoxins,从狩猎鱼的锥蜗牛孤立,目标肌肉烟碱的醋胆素受体。从食鱼的 Conus achatinus 的α 3 /5 conotoxin 的结构和功能没被学习。我们综合了二 pentadecamer 肽, Ac1.1a 和 Ac1.1b 与适当二硫化物结合,基于α 3 /5 conotoxinsfrom C 的 cDNA 序列。achatinus。Ac1.1a 和 Ac1.1b 由一仅仅氨基酸残余不同。他们分别地在堵住在 Xenopus laevisoocytes 表示的 recombinant 老鼠肌肉醋胆素受体上有类似的力量,与 36 nM 和 26 nM 的 IC_(50 ) 价值。为 Ac1.1b,开始的三 N 终端氨基酸的删除没改变它的活动,显示 N 终点不涉及和它的受体的相互作用。而且,我们的实验显示两毒素强烈在老鼠肌肉上比较喜欢α _1- δ子单元接口而不是α _1- γ结合部位烟碱的醋胆素受体。这些肽为结构的学习和烟碱的受体的功能提供另外的工具。 | Li LIU Geoffrey CHEW Edward HAWROT Chengwu CHI Chunguang WANG | 2007 | Acta Biochimica et Biophysica Sinica2007，39，6： | 5 |
| 3 | ANALYTICAL SOLUTIONS TO STRESS CONCENTRATION PROBLEM IN PLATES CONTAINING RECTANGULAR HOLE UNDER BIAXIAL TENSIONS显示文摘The stress concentration problem in structures with a circular or elliptic hole can be investigated by analytical methods. For the problem with a rectangular hole, only approximate results are derived. This paper deduces the analytical solutions to the stress concentration problem in plates with a rectangular hole under biaxial tensions. By using the U-transformation technique and the finite element method, the analytical displacement solutions of the finite element equations are derived in the series form. Therefore, the stress concentration can then be discussed easily and conveniently. For plate problem the bilinear rectangular element with four nodes is taken as an example to demonstrate the applicability of the proposed method. The stress concentration factors for various ratios of height to width of the hole are obtained. | Yi Yang Jike Liu Chengwu Cai | 2008 | Acta Mechanica Solida Sinica2008，21，5： | 4 |
| 4 | Effects of Temperature, Salinity, Light Intensity, and pH on the Eicosapentaenoic Acid Production of Pinguiococcus pyrenoidosus显示文摘The effects of temperature, light intensity, salinity, and initial pH on the growth and fatty acid composition of Pinguiococcus pyrenoidosus 2078 were studied for eicosapentaenoic acid (EPA) production potential. The fatty acid composition was assayed by gas chromatography-mass spectrometry, which indicated that the main fatty acids were C14:0, C16:0 and EPA. The highest EPA percentage 20.83% of total fatty acids was obtained at 20℃ with the temperature being set at 20, 24, and 28℃. Under different salinities and light intensities, the highest percentages of total polyunsaturated fatty acids (PUFAs) and EPA were 17.82% and 31.37% of total fatty acids, respectively, which were achieved at salinity 30 and 100μmol photon m-2s-1 illumination. The highest percentages of total PUFAs and EPA were 38.75% and 23.13% of total fatty acids, respectively, which were reached at an initial pH of 6 with the test range being from 5.0 to 9.0. | SANG Min WANG Ming LIU Jianhui ZHANG Chengwu LI Aifen | 2012 | Journal of Ocean University of China2012，11，2： | 2 |
| 5 | Spectral characteristics of micro-seismic signals obtained during the rupture of coal显示文摘This study was performed to investigate the spectral characteristics of micro-seismic signals observed during the rupture of coal. Coal rupture micro-seismic observations were obtained on a test system that included an electro-hydraulic servo pressure tester controlled by a YAW microcomputer, a micro-seismic sensor, a loading system, and a signal collection system. The results show that the micro-seismic signal increases with increasing compressive stress at the beginning of coal rupture. The signal remains stable for a period at this stage. A large number of micro-seismic signals appear immediately before the main rupture event. The frequency of micro-seismic events reaches a maximum immediately after the coal ruptures. Micro-seismic signals were decomposed into several Intrinsic Mode Functions (IMF's) by the empirical mode decomposition (EMD) method using a Hilbert-Huang transform (HHT). The main fre- quency band of the micro-seismic signals was found to range from 10 to 100 Hz in the Hilbert energy spectrum and from marginal spectrum calculations. The advantage of applying an HHT is that this can extract the main features of the signal. This fact was confirmed by an HHT analysis of the coal micro-seis- mic signals that shows the technique is useful in the field of coal rupture. | Liu jikun Li Chengwu Wang Cuixia Zhang Ruming Zhang Hao | 2011 | Mining Science and Technology2011，21，5： | 2 |
| 6 | Chemical synthesis and characterization of two α4/7-conotoxins显示文摘-Conotoxins 是对烟碱的醋胆素受体(nAChRs ) 的特定的子类型作为有势力和选择对手起作用的小抑制二硫化物的肽。我们以前从食虫的 Conus leopardus 从 molluscivorous Conus marmoreus 和 Lp1.4 克隆二 -conotoxins, Mr1.1。他们俩有 -conotoxins 的亚科的典型 4/7-type 框架 neuronal nAChRs 上的那行为。在这个工作,我们化学上综合了这二毒素并且描绘了他们的功能的性质。合成 Mr1.1 能首先禁止唤起的醋胆素(ACh ) 水流 reversibly 在表示卵母细胞的老鼠 7 nAChR,而 Lp1.4 是老鼠的意外特定的 blocker 胎儿的肌肉 11 受体。尽管他们的抑制亲密关系是相对低的,他们的唯一的受体识别侧面为毒素受体相互作用研究使他们成为珍贵工具。Mr1.1 能也压制煽动性的反应在 vivo 伤害,建议它应该进一步关于它在为疼痛的治疗的痛觉缺失和它的机制或治疗学的目标的分子的角色被调查。 | Can Peng Weihua Chen Tanya Sanders Geoffrey Chew Jing Liu Edward Hawrot Chengwu Chi | 2010 | Acta Biochimica et Biophysica Sinica2010，42，10： | 2 |
| 7 | Ultra-Fine Heterogeneous Microstructure Enables High Strength-Ductility in a Cold-Rolled Medium Mn Steel显示文摘The objective of the present study is to develop heterogeneous microstructure in cold-rolled medium Mn steels(MMSs)annealing strategy.The cold-rolled Fe-4.7Mn-0.15C(wt%)steel is annealed twice at different temperatures to produce an ultra-fine heterogeneous microstructure with lath-shaped and granular-shaped retained austenite.Excellent mechanical behavior of significant strength enhancement with negligible ductility loss can be achieved.The high strength-ductility properties are attributed to the active transformation induced plasticity effect over a broad strain range owing to dispersive mechanical stabilities of the heterogeneous austenite.Furthermore,the typical yield point elongation phenomenon which is commonly observed in cold-rolled MMSs can be effectively reduced by this microstructural strategy. | Baojia Hu Chengwu Zheng Qinyuan Zheng Peng Liu Chunni Jia Dianzhong Li | 2022 | Acta Metallurgica Sinica(English Letters)2022，35，10： | 2 |
| 8 | Viscous Heating for Laminar Liquid Flow in Microtubes显示文摘Using de-ionized ultra-filtered water (DIUFW) as the working fluid, the effects of viscous dissipation in micro-tubes with inner diameters of 19.9μm and 44.2μm, respectively, have been studied by experiments, the theoretical analysis and the numerical simulation at laminar state. Based on thermal imaging technology of micro-area, the temperature rise resulted from the viscous dissipation in microtube is measured by employing IR camera with a specially magnifying lens at different Reynolds numbers. A 2-D model adapted to microtube is presented to simulate the viscous dissipation characteristic considering electric double layer effect (EDL). The investigation shows the calculating results are in rough agreement with the experimental data if removing the experimental uncertainties. Based on the experimental and the numerical simulation results, a viscous dissipation number which can describe the law of the viscous heating in microtube is summed up and it explains the abnormity of the flow resistance in microtubes. | Zhigang LIU Shiqiang LIANG Chengwu ZHANG Ning GUAN | 2011 | Journal of Thermal Science2011，20，3： | 1 |
| 9 | Large masses with diffuse calcification:pulmonary sclerosing hemangioma显示文摘 | Zhu Yunke Pu Qiang Liu Chengwu | | 0，，03： | 1 |
| 10 | PHOSPHATIDYLSERINE SYNTHASE1 is Required for Inflorescence Meristem and Organ Development in Arabidopsis显示文摘Phosphatidylserine (PS ) ,份量上未成年者膜 phospholipid,在膜结构除它的角色以外涉及许多生物过程。一 PS 合成基因, PHOSPHATIDYLSERINE SYNTHASE1 (PSS1 ) ,被发现了在 Arabidopsis thaliana L 为小孢子开发被要求。但是 PSS1 怎么影响 postembryonic 开发,大部分仍然是未知的。这里,我们证明 PSS1 也在 Arabidopsis 为开花期分裂组织和机关开发被要求。PSS1 的混乱引起严重侏儒症,更小的侧面的机关和开花期分裂组织的减少的尺寸。词法、分子的研究建议房间分割和房间延伸在 pss1-1 异种被影响。在 situ 杂交和倡导者 GUS 分析表演的 RNA WUSCHEL (WUS ) 和 CLAVATA3 (CLV3 ) 的那表情取决于 PSS1。而且,在分裂组织维护的缺点被恢复, WUS 和 CLV3 的表示在 pss1-1 clv1-1 被恢复两倍异种。SHOOTSTEMLESS (STM ) 和 BREVIPEDICELLUS (BP ) 是 upregulated,并且植物生长素分发在 pss1-1 的插座叶子被破坏。然而, BP 的表示,也是 internode 开发的一个管理者,沉醉于 pss1-1 开花期茎。我们的数据建议 PSS1 由调整一级 KNOX 基因的差别通过 WUS-CLV 小径在开花期分裂组织维护,并且在叶和 internode 开发起必要作用。 | Chengwu Liu Hengfu Yin Peng Gao Xiaohe Hu Jun Yang Zhongchi Liu Xiangdong Fu Da Luo | 2013 | Journal of Integrative Plant Biology2013，55，8： | 1 |
| 11 | Characterization of a novel α4/4-conotoxin, Qcl.2, from vermivorous Conus quercinus显示文摘 | Can Peng Weihua Chen Yuhong Han Tanya Sanders Geoffrey Chew Jing Liu Edward Hawrot Chengwu Chi Chunguang Wang | 2009 | Acta Biochimica et Biophysica Sinica2009，41，10： | 1 |
| 12 | Lead and Cadmium Synergistically Enhance the Expression of Divalent Metal Transporter 1 Protein in Central Nervous System of Developing Rats显示文摘 | Chengwu Gu Songjian Chen Xijin Xu Liangkai Zheng Yan Li Kusheng Wu Junxiao Liu Zongli Qi Dai Han Gangjian Chen Xia Huo | 2009 | Neurochemical Research2009，，6： | 1 |
| 13 | Inhibitory effect of phycocyanin from Spirulina platensis on the growth of human leukemia K562 cells显示文摘 | Yufeng Liu Lizhi Xu Ni Cheng Lijun Lin Chengwu Zhang | 2000 | Journal of Applied Phycology2000，，： | 1 |
| 14 | Evaluation on Resource Utilization Potential of Typical Agricultural Waste in Southwest China显示文摘To impel resource utilization of agricultural waste,four provinces and cities of southwest China were taken as research objects,to analyze yield change of typical agricultural waste in southwest China during 2010-2016,and resource amounts of typical agricultural crops straw and livestock and poultry waste and their nutrient contents in four provinces and cities of southwest China in 2016 were calculated. The results showed that resource amount of typical agricultural waste in southwest China overall showed a continuously increasing trend with the improvement of agricultural comprehensive productivity. Straw resource amount of agricultural crops was dominant by rice and corn,and they accounted for 61. 61% of total amount in southwest China. Livestock and poultry manure was dominant by cattle and pig excrement,and they accounted for 89. 59% of total in southwest China. Seen from distribution region,the resource amount sequence of typical agricultural waste in southwest China was Sichuan > Yunnan > Guizhou > Chongqing. N,P_2 O_5 and K_2 O in straw resource of typical agricultural crops in southwest China of 2016 were respectively 76. 11 ×10~4,23.36 ×10~4 and 125. 78 × 10~4 t,and total nutrient amount was 22. 53 × 10~5 t. N,P_2 O_5 and K_2 O of livestock and poultry manure resource were respectively 27. 28 × 10~4,12. 87 ×10~4 and 62. 45 × 10~4 t,and total nutrient amount was 10. 26 × 10~5 t. Therefore,resource amount of agricultural waste in southwest China is rich in a long term,and nutrient storage is huge. Its reasonable recycling is favorable for sustainable development of agriculture in southwest China,and has important actual significance for guaranteeing crop yield and decreasing chemical fertilizer use. | Yin Rongxiu Qin Song Wanjg Wenhua Liu Lingling Fan Chengwu Zhou Ruirong Zheng Yuanli Zhang Bangxi | 2018 | Meteorological and Environmental Research2018，9，6： | 1 |
| 15 | Construction and expression of DNA vaccine pIRES-Sj97-Sj14-Sj26 and its immunogenicity in mice显示文摘 | Shuojie Liu Jizhong Cheng Chengwu Tang Yanbin Ma Shuyu Wang Ping Guo Qiuhong Duan Hong Gao Wuxing Dai | 2008 | Journal of Huazhong University of Science and Technology2008，，6： | 1 |
| 16 | Estimation of the spa- tial rainfall distribution using inverse distance weighting (IDW) in the middle of Taiwan Province显示文摘 | Chen Fengwen Liu Chengwuing | 2012 | Paddy and Water Environment2012，10，3： | 1 |
| 17 | Assessment of the re- covery and front contrast of CO2 EOR and sequestration in a new gas condensate reservoir by compositional simulation and seismic modeling显示文摘 | Yuan Chengwu Zhang Zhong Liu Kaijian | 2015 | Fuel2015，142，1： | 1 |
| 18 | Im- proved Melting Strength of Polypropylene by Reactive Com- pounding with Ultrafine Full-Vulcanized Polybutadlene Rubber (UFBR) Particles 显示文摘 | Liu Yuguang Huang Yudong Zhang Chengwu | 2009 | Polym Eng Sci2009，49，9： | 1 |
| 19 | Journal of Central South University 显示文摘 | Liu Zhiyi Ye Chengwu Zhang Kun | 2005 | 36(6): 9332005，36，6： | 1 |
| 20 | Permanent Magnet Assisted Synchronous Reluctance Motor with Asymmetric Rotor for High Torque Performance显示文摘Permanent magnet assisted synchronous reluctance motor(PMA-SynRM)is a kind of high torque density energy conversion device widely used in modern industry.In this paper,based on the basic topology of PMA-SynRM,a novel PMA-SynRM of asymmetric rotor with position-biased magnet is proposed.The asymmetric rotor design with position-biased magnet realizes the concentration of magnetic field lines in the motor air gap to obtain higher electromagnetic torque,and makes both of magnetic and reluctance torque obtain the peak value at the same current phase angle.The asymmetric rotor configuration is theoretically illustrated by space vector diagram,and the feasibility of high torque performance of the motor is verified.Through the finite element simulation,the effect of the side barrier on output torque and the Mises stress under the rotor asymmetrical design are analyzed.Then the motor characteristics including airgap flux density,back EMF,magnetic torque,reluctance torque,torque ripple,losses,and efficiency are calculated for both the basic and proposed PMA-SynRMs.The results show that the proposed PMA-SynRM has higher torque and efficiency than the basic topology.Moreover,the torque ripple of the proposed PMA-SynRM is reduced by the method with harmonic current injection,and the torque characteristics in the whole current cycle are analyzed.Finally,the endurance to avoid PM demagnetization is confirmed based on the PM remanence calculation. | Chengwu Diao Wenliang Zhao Yan Liu Xiuhe Wang | 2023 | CES Transactions on Electrical Machines and Systems2023，7，2： | 0 |
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