|
|
|
题名
|
作者
|
年代
|
出处
|
被引量
|
| 1 | A MATHEMATICAL MODEL FOR RESERVOIR SEDIMENTATION AND FLUVIAL PROCESSES显示文摘This paper consists of two parts: mechanism of non-equilibrium transport of non-uniform sediment and its application in the mathematical model. Based on a statistic approach of sediment transport proposed by the authors, a 1 - D equation of non-e- quilibrium transport for various size group of sediment particles is developed. Then equations to predict change of sediment concentration and the corresponding changes in size distribution of suspended load and bed material are also derived. The conception that changes in size distribution are interrelated to sediment-carrying capacity is expounded. These results reveal the essence of sediment transport of non-uniform sediment particles. In the second part a mathematical model incorporating the mentioned equations to compute deposition and scouring in reservoirs as well as the fluvial processes of river channels has been developed. Verification of the model agrees well with field data. | Han Qiwei and He Mingmin (Senior Research Engineers, Dept. of Sedimentation Eng. Inst. of Water Conservancy and Hydroelectric Power Research.) (The English text is abridged, altered and edited by Ding Lianzhen) | 1990 | International Journal of Sediment Research1990，5，2： | 10 |
| 2 | A Practical Process for the Synthesis of Translocator Protein 18kDa Imidazopyridine Ligand显示文摘In this article, an effective feasible method to synthesize translocator protein 18kDa(TSPO) imidazopyridine ligand 7 is discussed. A new procedure for the synthesis of the key intermediate 17 has been developed in four steps(condensation, diazo reaction, hydrolysis, amidation) from 2-aminopyridine 18. The overall yield was increased from 18% to 31.6%. One of the key steps is using activated copper powder as a catalyst in several cycles. Finally, reduction of 17 with Zn dust completed the synthesis of TSPO imidazopyridine ligand 7 in 86% yield. | WEN Meng QU Chunrong SU Xinhui DING Mingmin DENG Zixin HONG Xuechuan | 2014 | Wuhan University Journal of Natural Sciences2014，19，1： | 2 |
| 3 | Tensile Properties and Prediction Model of Recombinant Bamboo at Different Temperatures显示文摘The destruction of recombinant bamboo depends on many factors,and the complex ambient temperature is an important factor affecting its basic mechanical properties.To investigate the failure mechanism and stress–strain relationship of recombinant bamboo at different temperatures,eighteen tensile specimens of recombinant bamboo were tested.The results showed that with increasing ambient temperature,the typical failure modes of recombinant bamboo were flush fracture,toothed failure,and serrated failure.The ultimate tensile strength,ultimate strain and elastic modulus of recombinant bamboo decreased with increasing temperature,and the ultimate tensile stress decreased from 154.07 to 96.55 MPa,a decrease of 37.33%,and the ultimate strain decreased from 0.011 to 0.008,a decrease of 26.57%.Based on the Ramberg-Osgood model and the pseudo‒elastic design method,a predictive model was established for the tensile stress–strain relationship of recombinant bamboo considering the temperature level.The model can accurately evaluate the tensile stress–strain relationship of recombinant bamboo under different temperature conditions. | Kunpeng Zhao Yang Wei Si Chen Kang Zhao Mingmin Ding | 2023 | Journal of Renewable Materials2023，11，6： | 0 |
| 4 | Experimental Study on the Creep Behavior of Recombinant Bamboo显示文摘The creep behavior of bamboo due to the complicated influences of environment and stress will lead to a sustained increase in deformation,which serious effects the service performance of structures.To investigate the creep behavior of recombinant bamboo,twenty-four recombinant bamboo specimens were tested under lasting compressive and tensile loads at different load levels.The typical failure modes of recombinant bamboo under a lasting load at a high load level were buckling failure and brittle fracturing due to creep compressive creep and tensile creep development,respectively.At a high load level,the creep deformation of recombinant bamboo initially develops unsteadily and increases rapidly until failure;at a low load level,creep deformation rapidly develops in the early stage and stabilizes in the middle and late stages.The load level has notable effects on the overall creep deformation and the proportion of creep deformation.The residual deformation of creep will generally increase and the recovery of creep will decrease with increasing load level.Based on the Burgers model,predictive models that can take the load levels into account were proposed to evaluate the compressive and tensile creep behaviors of recombinant bamboo.The proposed models can be used to accurately evaluate the strain-time behavior of recombinant bamboo. | Yang Wei Kunpeng Zhao Chen Hang Si Chen Mingmin Ding | 2020 | Journal of Renewable Materials2020，8，3： | 0 |
| 5 | Effect of Ca^(2+) complexation on oxygen partial pressure in the urinary bladder meridian of goats显示文摘The aim of this paper was to explore the relationship between energy metabolism and the meridian phenomenon.The manner of change of oxygen partial pressure in acupoints and no-acupoints of the urinary bladder meridian of goats was observed with a needle-type tissue oxygen tension sensor after the acupuncture effect was blocked by Ca^(2+) complexation with ethylenediamine tetraacetic acid(EDTA)-Na2.The results showed that:(1)the concentration of calcium ion in urinary bladder meridian acupoints was higher than that in no-acupoints(P<0.01 or P<0.05);(2)the tissue oxygen tension in urinary bladder meridian acupoints was higher than that in no-acupoints(P<0.01);(3)the oxygen partial pressure in acupoints decreased significantly after injection with EDTA-Na2,compared with injection of either normal sodium or nothing(P<0.01);(4)the oxygen partial pressure in acupoints was higher than that in no-acupoints after EDTA-Na2 injection(P<0.01).Acupuncture could reduce oxygen partial pressure in acupoints by regulating microcirculation and increasing metabolic levels. | Qi WANG Hongzhi JIANG Shengli CHEN Mingmin ZHANG Mingxing DING Esheng KONG Guangying HUANG | 2009 | Frontiers of Medicine2009，3，1： | 0 |
您所在的机构暂未开通此部分的功能，请联系管理员