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Emergy analysis of paddy farming in Hunan Province, China： A new perspective on sustainable development of agriculture

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Journal of Integrative Agriculture 2016年第10期15卷 2426-2436页

作者： YI Ting xiang ping-an Biological Science and Technology College Hunan Agricultural University Changsha 410128 P.R. China Key Laboratory of Rural Ecosystem Health in Dongting Lake Area of Hunan Province Changsha 410128 P.R. China Business College of Hunan Agricultural University Changsha 410128 P.R. China

The multi-functionality of paddy farming has become a hot issue recently. Paddy farming provides numerous ecosystem services that are crucial to human well-being. However, evaluation of the contribution of paddy farming to human well-being usually focus on its economic value, while its non-market services are usually ignored. Only evaluating the market profits or market relative benefits cannot reflect comprehensively the contribution of paddy farming to people＇s well-being. This will affect people＇s choices for or against paddy farming activities and people＇s opt for invest or not invest in it. A comprehensive evaluation of paddy farming can provide an important reference for the government and society to conserve the multi-functionality of paddy farming and achieve sustainable development. To this end, this paper reports a case evaluation of paddy farming in Hunan, the largest rice producing as well as rice yield province in China, and uses emergy theory to make a comprehensive evaluation for paddy farming. The emergy evaluation results of the paddy ecosystem in Hunan are as follows： in 2010, the input emergy of the paddy ecosystem in Hunan is 2.51E＋22 sej and the output emergy is 6.31E＋22sej. For the input emergy, the part from natural resources is 1.96E＋21 sej and the part from human society is 2.32E＋22sej; for the output emergy, the part from products is 2.22E＋22 sej, the part from impositive externality is 4.16E＋22 sej and the part from negative externality is –7.41E＋20 sej. Taking the non-market outputs into consideration, the gains from the human economic society＇s 1 $ input in paddy farming, emergy sustainability index（ESI） and emergy profit rate are respectively 2.73 $, 3.53 and 151.31%. If the evaluation leave out the non-market output, the three indexes are only 0.96 $,1.24 and 30.67%. The research results show that non-market services of paddy farming contribute significantly to human well-being. Therefore, in order to protect the multi-functionality of

关键词： paddy farming emergy analysis ecosystem services Hunan Province

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INFLUENCE OF GAPS BETWEEN 3-D MULTIPLE FLOATING STRUCTURES ON WAVE FORCES

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Journal of Hydrodynamics 2005年第2期17卷 141-147页

作者： ZHURen-chuan MIAOGuo-ping YOUYun-xiang StateKeyLaboratoryofOceanEngineering SchoolofNavalArchitectureOceanandcivilEngineeringShanghaiJiaotongUniversityShanghai200030China

In the present investigation, influence of gaps between multiple floating structures on wave forces is examined. Strong and complicate hydrodynamic interactions between the floating bodies are observed and the numerical computations have proved the existence of the sharp peak force response on each floating body at some special resonant wave numbers. The resonant wave number is also proved to be around kL=nπ(n=1, 2, …, ∞) with a corresponding frequency shift. A small yet finite gap width will also give influence on the resonant frequency and resonant amplitude of the wave forces, but when the distance between two aligned box-shaped floating bodies becomes big enough, the hydrodynamic interaction can be neglected. The strong hydrodynamic interaction feature has its own important practical significance for the design of module structures and the links (connection) in the whole floating body system. Moreover, the importance is closely related to the hydro-elasticity analyses of a multiple box-shaped floating body system, in which local loads may be as important as the integrated loads.

关键词： resonance wave interaction multiple floating bodies gap influence

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Resonance analysis of a high-speed railway bridge using a stochastic finite element method

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Earthquake Engineering and Engineering Vibration 2023年第4期22卷 1015-1030页

作者： xiang ping Yan Weiran Jiang Lizhong Zhou Wangbao Wei Biao Liu xiang Hunan International Scientific and Technological Innovation Cooperation Base of Advanced Construction and Maintenance Technology of Highway Changsha University of Science and TechnologyChangsha 410114China School of Civil Engineering Central South UniversityChangsha 410075China School of Civil Engineering Fujian University of TechnologyFuzhou 350118China

There is always some randomness in the material properties of a structure due to several circumstances and ignoring it increases the threat of inadequate structural safety reserves.A numerical approach is used in this study to consider the spatial variability of structural *** moments of the train and bridge responses were computed using the point estimation method(PEM),and the material characteristics of the bridge were set as random fields following Gaussian random distribution,which were discretized using Karhunen-Loève expansion(KLE).The following steps were carried out and the results are discussed ***,using the stochastic finite element method(SFEM),the mean value and standard deviation of dynamic responses of the train-bridge system(TBS)were *** effectiveness and accuracy of the computation were then confirmed by comparing the results to the Monte-Carlo simulation(MCS).Next,the influence of the train running speed,bridge vibration frequency,and span of the bridge on dynamic coefficient and dynamic response characteristics of resonance were discussed by using the ***,the lowest limit value of the vibration frequency of the simple supported bridges(SSB)with spans of 24 m,32 m,and 40 m are presented.

关键词： train-bridge system material randomness Karhunen-Loève expansion Gauss integral dynamic coefficient natural frequency

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Positive Solutions Bifurcating from Zero Solution in a Lotka-Volterra Competitive System with Cross-Diffusion Effects

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Applied Mathematics(A Journal of Chinese Universities) 2011年第3期26卷 342-352页

作者： ZHANG Cun-hua YAN xiang-ping Department of Mathematics Lanzhou Jiaotong University Lanzhou 730070 China

A strongly coupled elliptic system under the homogeneous Dirichlet boundary condition denoting the steady-state system of the Lotka-Volterra two-species competitive system with cross-diffusion effects is considered. By using the implicit function theorem and the Lyapunov- Schmidt reduction method, the existence of the positive solutions bifurcating from the trivial solution is obtained. Furthermore, the stability of the bifurcating positive solutions is also investigated by analyzing the associated characteristic equation.

关键词： Lotka-Volterra competitive system Cross-Diffusion Positive solution Steady state bifurcation Stability.

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Chaotic Ratchet Effect for Bose-Einstein Condensed Atoms in 1D Optical Lattices

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Communications in Theoretical Physics 2008年第12期50卷 1355-1360页

作者： FANG Jian-Shu ZHANG xiang-ping Institute of physics Hunan University of Technology Zhuzhou 412008 China Department of Physics Hunan Normal University Changsha 410081 China

The chaotic ratchet effect for Bos-Einstein condensed atoms in an optical lattice is investigated. By using the direct perturbation method we obtain the chaotic solution of the condensed system. Theoretical analysis reveals that the transport of the condensed atoms in the ratchet potential is a chaotic one, and corresponding numerical results agree well with the theoretical results.

关键词： chaotic ratchet effect condensed atoms optical lattices

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Characterization of heat shock protein 90, 70 and their transcriptional expression patterns on high temperature in adult of Graphofita molesta （Busck）

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Insect Science 2014年第4期21卷 439-448页

作者： Hao Chen xiang-Li Xu Yi-ping Li Jun-xiang Wu Key Laboratory of Plant Protection Resources and Pest Management (Northwest A&F University) Ministry of Education Key Laboratoryof Appfied Entomology Northwest A&F University Yangling Shaanxi China

Grapholita molesta （Busck） is a worldwide insect pest damaging stone and pome fruits. High temperature can significantly affect insect survival, development and fecundity. Heat shock protein （Hsp） genes were speculated to possess a pivotal function in response to high temperature stress. In this study, two full-length Hsp genes, Gmhsp90 and GmhspTO, were cloned from G. molesta using rapid amplification of complementary DNA ends （RACE）. The open reading frames of Gmhsp90 and Gmhsp70 obtained were 2 148 bp and 1 998 bp in length, respectively. Their deduced amino acids showed high homology to Hsp genes of other species. Subsequently, the transcriptional expression of Gmhsp90 and Gmhsp70 in G. molesta adults exposed at various temperatures （26, 29, 32, 35, 38, 41 and 44℃） for 1 h and at 41℃ for various time duration （0, 15, 30, 45, 60, 75, 90 and 105 min） were investigated via real time quantitative polymerase chain reaction （qPCR）. The relative expression levels of Gmhsp90 and Gmhsp70 in G. molesta adults were both up-regulated with the rise of temperature and time duration. In addition, the Gmhsp70 usually showed a higher transcription accumulation than Gmhsp90. Interestingly, Gmhsp90 and Gmhsp 70 in female adults could be induced much earlier than that in males, and the effective induction temperature in females was also lower than that in males. The distinct expression profiles of Gmhsp90 and Gmhsp 70 indicated that Gmhsp90 and Gmhsp 70 may play important roles in G. molesta adults responding to a thermal threat, and there is difference on induction between sexes.

关键词： Grapholita molesta heat shock protein high temperature sex difference

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HSP90 and SIRT3 expression in hepatocellular carcinoma and their effect on invasive capability of human hepatocellular carcinoma cells

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Asian Pacific Journal of Tropical Medicine 2015年第4期8卷 305-308页

作者： Ming Gao Xiao-ping Geng He-ping xiang Department of Emergency Surgery Second Affiliated Hospital of Anhui Medical University Department of General Surgery Second Affiliated Hospital of Anhui Medical University

Objective:To vexplore expression of HSP90,SIRT3 in liver cancer tissue and its effect on liver cancer cell invasion ***:Moderate expression of HSP90 in SMMC-7721,HepG2,LO2 and Hep-3B cell lines were screened,which was validated by *** of HSP90 cell line and lentivirus packaging HSP90-RNAi were established,which was validated by RT-PCR and western *** level of epithelial-mesenchymal transition(EMT)related gene was detected by western *** percentage of cancer stem cells was assayed by flow ***:RT-PCR demonstrated the highest expression of HSP90mRNA in SMMC-7721 cells,the lowest expression of HSP90 mRNA in Hep3B and LO2 and the moderate expression of HSP90 mRNA in ***,HepG2 was selected as a follow-up experiment cell *** with the blank control group,expression of HSP90in HSP overexpression group was increased obviously,and expression of HSP90 in HSP90shRNA group was significantly decreased,which indicated successful establishment of HSP overexpression and shRNA *** apoptotic cell in hsp-siRNA group was higher than the blank control group,while the HSP overexpression group showed opposite *** blot results showed transfection HSP promoted cells EMT transformation,up-regulated the level of E-cadherin,and down-regulated the level of Vimentin;meanwhile,shRNA group showed opposite ***:Carcinoma HepG2 cell transfeeted high expression of HSP can promote the transformation of EMT,improve the expression of Vimentin,reduce the expression of E-cadherin,and inhibit apoptosis of cancer stem cells,which improve the invasive ability of cancer of the liver *** hsp-siRNA group presents opposite *** summary,the expression of HSP is closely related to the occurrence,development and invasion of cancer of the liver tissue.

关键词： HSP90 SIRT3 EMT Cancer stem cell Liver cancer

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Lipase immobilized on HOOC-MCF:A highly enantioselective catalyst for transesterification resolution of (R,S)-1-phenylethanol

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Chinese Chemical Letters 2007年第8期18卷 929-932页

作者： ping Xue xiang Hui Yan Zheng Wang Key Laboratory of Energy Resources and Chemical Engineering Ningxia University Yinchuan 750021 China

Pseudomonas cepacia lipase （PSL） immobilized on the carboxyl-functionalized meso-cellular foams （HOOC-MCF） was used for the transesterification resolution of （R,S）-l-phenylethanol in organic solvent. The results showed that the ee value of （S）-1- phenylethanol and （R）-1-phenylethyl acetate reached 99% with 50% conversion of 1-phenylethanol using toluene as solvent. Furthermore, it was found that PSL/HOOC-MCF exhibited high enantioselectivity in organic solvent with log P ≤ 2 such as toluene and hexane.

关键词： Immobilized lipase Enantioselectivity Chiral resolution 1-Phenylethanol

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Exact Solution for Jaynes-Cummings Model with Bosonic Field Nonlinearity and Strong Boson-Fermion Coupling

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Communications in Theoretical Physics 2006年第1期45卷 143-146页

作者： YANG Jin YU Wan-Lun xiang An-ping Department of Optics and Electronics Chengdu University of Information Technology~ Chengdu 610225 China

We use Lewis Riesenfeld invariant approach to treat the modified Jaynes-Cummings models involving any forms of nonlinearty of the bosonic field when strong boson-fermion couplings are nilpotent Grassmann valued. The general state functions, time evolution operator and the time-evolution expressions for both the bosonic number and the fermionic number are presented.

关键词： nonlinear Jaynes-Cummings model invariant method exact solution

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Intrathecal liproxstatin-1 delivery inhibits ferroptosis and attenuates mechanical and thermal hypersensitivities in rats with complete Freund's adjuvant-induced inflammatory pain

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Neural Regeneration Research 2023年第2期18卷 456-462页

作者： Yi-Fan Deng ping xiang Jing-Yi Du Jian-Fen Liang xiang Li Department of Anesthesiology The Third Affiliated HospitalSun Yat-sen UniversityGuangzhouGuangdong ProvinceChina Department of Medical Quality Management Nanfang HospitalSouthern Medical UniversityGuangzhouGuangdong ProvinceChina

Previous studies have confirmed the relationship between iron-dependent ferroptosis and a peripheral nerve injury-induced neuropathic pain ***,the role of fe rroptosis in inflammatory pain remains ***,we aimed to explore whether ferroptosis in the spinal cord and do rsal root ganglion contributes to complete Freund's adjuvant(CFA)-induced painful behaviors in *** results revealed that various biochemical and morphological changes were associated with ferroptosis in the spinal cord and dorsal root ganglion tissues of CFA *** changes included iron overload,enhanced lipid peroxidation,disorders of anti-acyl-coenzyme A synthetase long-chain family member 4 and glutathione peroxidase 4 levels,and abnormal morphological changes in *** treatment of liproxstatin-1(a ferroptosis inhibitor)reve rsed these ferroptosis-related changes and alleviated mechanical and thermal hype rsensitivities in CFA *** study demonstrated the occurrence of fe rroptosis in the spinal cord and do rsal root ganglion tissues in a rodent model of inflammatory pain and indicated that intrathecal administration of fe rroptosis inhibitors,such as liproxstatin-1,is a potential therapeutic strategy for treating inflammatory pain.

关键词： cell death complete Freund's adjuvant dorsal root ganglion ferroptosis inflammatory pain intrathecal delivery liproxstatin-1 spinal cord

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