|
|
|
题名
|
作者
|
年代
|
出处
|
被引量
|
| 1 | Design Principles of the Non-smooth Surface of Bionic Plow Moldboard显示文摘The diverse non-smooth body surfaces to reduce soil adhesion are the evolutional results for the soil animals to fit the adhesive and wet environment and can be used as a biological basis for the design of bionic plow moldboard. The model surfaces for bionic simulation should be taken from soil animal digging organs, on which the soil motion is similar to what is on the surface of moldboard. By analyzing the distribution of non-smooth units on the body surface of the ground beetle jaw and the soil moving stresses, the design principles of the bionic moldboard for the local and the whole moldboard were presented respectively. As well, the effect of soil moving speed on reducing adhesion, the dimensions relationship between soil particles and non-smooth convexes, the relationship between the enveloping surface of non-smooth convexes and the initial smooth surface of the plow body, and the convex types of the sphere coronal and the pangolin scales,etc.were discussed. | Luquan Ren, Shiqiao Deng, Jingchun Wang, Zhiwu Han Key Laboratory of Terrain-Machine Bionics Engineering (Ministry of Education,China), Jilin University at Nanling Campus, Changchun 130022,P.R. China | 2004 | Journal of Bionic Engineering2004，1，1： | 28 |
| 2 | The integration of methanogenesis with denitrification and anaerobic ammonium oxidation in an expanded granular sludge bed reactor显示文摘The integration of methanogenesis with denitrification and anaerobic ammonium oxidation(ANAMMOX) was studied in an expanded granular sludge bed(EGSB) reactor in this work. Experimental results from the continuous treatment of wastewater with nitrite and ammonium, which lasted for 107 days, demonstrated that wastewater with high nitrite and ammonium could be anaerobically treated in an expanded granular sludge bed reactor. More than 91% to 97% of COD were removed at up to about 3.9 g COD/(L·d) of COD volumetric loading rate. More than 97% to 100% of nitrite was denitrified at up to about 0.8 g NO -2-N/(L·d), which is 16 times higher than that in a conventional activated sludge system with nitrification/denitrification(0.05 gN/(L·d)). No dissimilatory reduction of nitrite to ammonium occurred in the process. However, maximum of about 40% ammonium was found to be lost. Batch tests of 15 days with sludge from the reactor showed that 100% of nitrite was denitrified completely, and about 3% of ammonium was removed when only ammonium (34.3 mg/L) and nitrite(34.3 mg/L) were added into the sludge suspension medium. Furthermore, about 15% of ammonium amounts were lost with organic COD addition. It suggested that the methanogenesis in the system could enhance ANAMMOX because of intermediate hydrogen produced during methanogenesis. | ZHANG Dai-jun 1,2 (1. Department of Environmental Science, Chongqing University, Campus A, Chongqing 400044, China 2. Key Laboratory for the Southwest China Resources Exploitation and Environmental Disaster Control Engineering, Ministry of Education, China.) | 2003 | Journal of Environmental Sciences2003，15，3： | 26 |
| 3 | Hypertension and renal disease显示文摘The relationship between chronic kidney disease(CKD)and hypertension remains enigmatic and a matter of considerable clinical and academic interest with evidence indicating that hypertension is both a cause and a consequence of kidney disease[1-2]. | Huang Chunfa Louis Stokes Cleveland Veteran Affairs Medical Center Division of Nephrology,Departments of Medicine,Case Western Reserve University and Rammelkamp Center for Research and Education,MetroHealth System Campus,Cleveland,Ohio 441061 | 2011 | 中华高血压杂志2011，19，12： | 23 |
| 4 | Continuity of Higher Order Commutators on Certain Hardy Spaces | DING Yong LU Shan Zhen Department of Mathematics,Beijing Normal University,Beijing 100875.P.R.China E-mail:dingy@bnu.edu.cn lusz@bnu.edu.cnZHANG Pu Department of Mathematics.Zhejiang University(at Xixi Campus).Hangzhou 310028,P.R.China,E-mail:zhpjj@263,net | 2002 | Acta Mathematica Sinica,English Series2002，18，2： | 21 |
| 5 | Recent advances in electrochemistry of sulfide mineral flotation显示文摘The electrochemical basis for understanding the interaction of thiol collectors with sulfide minerals is reviewed. Spectroscopic techniques are being increasingly applied to augment electrochemical studies and provide unequivocal identification of species formed at mineral surfaces in flotation systems. These include X ray photoelectron, Fourier transform infrared spectroscopy and, more recently, surface enhanced Raman scattering spectroscopy. The progress that has been made in the application of electrochemical measurement to monitor and control flotation plants is also considered. | R.Woods Faculty of Science and Technology, Griffith University, Nathan Campus, Queensland 4111, Australia | 2000 | 中国有色金属学会会刊:英文版2000，10，S1： | 12 |
| 6 | Construction of a host range-expanded hybrid baculovirus of BmNPV and AcNPV, and knockout of cysteinase gene for more efficient expression显示文摘AcNPV (Autographa californica nuclear polyhedrosis virus) and BmNPV(Bombyx mori nuclear polyhedrosis virus) are two principal insect-baculovirus expression systems, each having different characteristics. AcNPV has a wider host range and can infect a series of cell lines thus making it suitable for cell suspension culture expression, but the small size of the host insect, A. californica, makes AcNPV less suitable for large scale protein synthesis. In contrast, BmNPV can only infect the silkworm, Bombyx mori, which is well-known for its easy rearing and large size. These characteristics make the BmNPV system especially suitable for large-scale industrial ex-pression. To utilize the advantages of both AcNPV and BmNPV, we tried to expand their host range through homologous recombination and successfully constructed a hybrid baculovirus of AcNPV and BmNPV, designated as HyNPV. The hybrid baculovirus can infect the hosts of both AcNPV and BmNPV. Taking the human basic fibroblast growth factor (bFGF) gene as an appli-cation example, we constructed a recombinant, HyNPV-bFGF. This construct is able to express the bFGF protein both in silkworm larvae and in common-use cell lines, sf21, sf9 and High-five. Moreover, to reduce the loss of recombinant protein due to degradation by proteases that are simultaneously expressed by the baculovirus, we knocked out the cysteinase gene coding for one of the most important baculovirus proteases. This knockout mutation improves the produc-tion efficiency of the bFGF recombinant protein. | WU Xiaofeng, CAO Cuiping, XU Yaxiang & LU Xingmeng College of Animal Sciences, Zhejiang University, Huajiachi Campus, Hangzhou 310029, China | 2004 | Science China(Life Sciences)2004，47，5： | 12 |
| 7 | 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 |
| 8 | Modeling of multi-inclusion composites with interfacial imperfections:Micromechanical and numerical simulations显示文摘A micromechanical approach based on a two-layer built-in model and a numerical simulation based on boundary element method are proposed to predict the effective properties of the multi-inclusion composite with imperfect interfaces.The spring model is introduced to simulate the interface imperfection.These two methods are compared with each other,and good agreement is achieved.The effects of interface spring stiffness,volume ratio and stiffness of inclusions on the micro-and macro-mechanical behaviors of fiber-reinforced composites are investigated.It is shown that the developed micromechanical method is very comprehensive and efficient for fast prediction of effective properties of composites,while the numerical method is very accurate in detailed modeling of the mechanical behavior of composites with multiple inclusions. | CHEN WeiQiu 1,ZHU XingYi 2 &HUANG ZhiYi 2 1 Department of Engineering Mechanics,Yuquan Campus,Zhejiang University,Hangzhou 310027,China 2 Key Laboratory of Soft Soils and Geoenvironmental Engineering,Ministry of Education Department of Civil Engineering,Zijingang Campus,Zhejiang University,Hangzhou 310058,China | 2010 | Science China(Technological Sciences)2010，53，3： | 8 |
| 9 | A KIND OF IMPLICIT ITERATIVE METHODS FOR ILL-POSEDOPERATOR EQUATIONS显示文摘1.IntroductionLetX,YbetworealHilbertspacesandletA:X--+Ybeaboundedlinearoperator.ConsidertheoperatorequationAx^y.(1.1)IfR(A),i.e.,therangeofA,isnonclosedinY,equation(1.1)isill-posed[1].Manyimportantproblemsinappliedsciencesresultinthiskindofequations... | Guo-qiang He Lin-clan Liu(Department of Mathematics, Shanghai University, Jiading Campus, Shanghai 201800, China) | 1999 | Journal of Computational Mathematics1999，17，3： | 8 |
| 10 | Fast multipole boundary element analysis of 2D viscoelastic composites with imperfect interfaces显示文摘A fast multipole boundary element method(FMBEM)is developed for the analysis of 2D linear viscoelastic composites with imperfect viscoelastic interfaces.The transformed fast multipole formulations are established using the time domain method. To simulate the viscoelastic behavior of imperfect interfaces that are frequently encountered in practice,the Kelvin type model is introduced.The FMBEM is further improved by incorporating naturally the interaction among inclusions as well as eliminating the phenomenon of material penetration.Since all the integrals are evaluated analytically,high accuracy and fast convergence of the numerical scheme are obtained.Several numerical examples,including planar viscoelastic composites with a single inclusion or randomly distributed multi-inclusions are presented.The numerical results are compared with the developed analytical solutions,which illustrates that the proposed FMBEM is very efficient in determining the macroscopic viscoelastic behavior of the particle-reinforced composites with the presence of imperfect interfaces.The laboratory measurements of the mixture creep compliance of asphalt concrete are also compared with the prediction by the developed model. | ZHU XingYi 1 ,CHEN WeiQiu 2 ,HUANG ZhiYi 1* &LIU YiJun 3 1 Department of Civil Engineering,Zhejiang University,Zijingang Campus,Hangzhou 310058,China 2 Department of Engineering Mechanics,Zhejiang University,Yuquan Campus,Hangzhou 310027,China 3Department of Mechanical Engineering,University of Cincinnati,Cincinnati,Ohio 45221-0072,USA | 2010 | Science China(Technological Sciences)2010，53，8： | 7 |
| 11 | Anti-wear properties on 20CrMnTi steel surfaces with biomimetic non-smooth units显示文摘In order to gain a sufficient wear resistance for applications, the biomimetic non-smooth units in concave were fabricated on the surfaces of 20CrMnTi steel using a biomimetic laser remelting technology. The diameter and distribution of the concaves were optimized using orthogonal experiment. The microstructures of the biomimetic non-smooth units were examined. The anti-wear behaviors were investigated by the rolling wear test with lubricant. The results of wear tests indicated that the biomimetic surfaces exhibit a higher anti-wear ability than the smooth surfaces. The biomimetic surface with concaves of 250 μm in diameter and transverse distance of 270 μm and longitudinal distance of 400 μm exhibits the best anti-wear property. The enhancement of wear resistance can be mainly attributed to the action of biomimetic non-smooth units and the super fined microstructure and hardness in the biomimetic unit zones. | HU Yong1,2, HAN ZhiWu2*, XU MingXu1 & ZHANG ZhiHui2 1College of Mechanical Science and Engineering, Nanling Campus, Jilin University, Changchun 130025, China 2 Key Laboratory of Bionic Engineering, Ministry of Education, College of Biology and Agriculture Engineering, Nanling Campus, Jilin University, Changchun 130025, China | 2010 | Science China(Technological Sciences)2010，53，11： | 6 |
| 12 | DUAL RANDOM MODEL OF INCREASING ANNUITY显示文摘The dual random models about the life insurance and social pension insurance have received considerable attention in the recent articles on actuarial theory and applications. This paper discusses a general kind of increasing annuity based on its force of interest accumulation function as a general random process. The dual random model of the present value of the benefits of the increasing annuity has been set, and their moments have been calculated under certain conditions. | He Wenjiong Zhang YiEconomic College & Science College, Zhejiang Univ.(Xixi Campus),Hangzhou 310028. | 2001 | Applied Mathematics(A Journal of Chinese Universities)2001，16，4： | 6 |
| 13 | Ruthenium(Ⅲ) chloride as an efficient catalyst for the synthesis of perimidine derivatives under mild conditions显示文摘Various biologically important perimidine derivatives have been synthesized efficiently from various ketones and naphthalene- 1,8-diamine by using a catalytic amount of RuCl3(1 mol%).This method is a very simple and high yielding reaction for the synthesis of perimidine derivatives. | Jing Zhang~a Song Lin Zhang~(a,b,*) Jun Min Zhang~a a Key Laboratory of Organic Synthesis of Jiangsu Province,College of Chemistry and Chemical Engineering,Dushu Lake Campus,Suzhou University,Suzhou 215123,China b College of Chemistry and Environmental Science,Henan Normal University,Xinxiang 453007,China | 2007 | Chinese Chemical Letters2007，18，9： | 5 |
| 14 | STREAMLINE DIFFUSION F.E.M. FOR SOBOLEV EQUATIONS WITH CONVECTION DOMINATED TERM显示文摘In this paper,a streamline diffusion F.E.M. for linear Sobolev equations with convection dominated term is given.According to the range of space time F.E mesh parameter h ,two choices for artifical diffusion parameter δ are presented,and for the corresponding computation schemes the stability and error estimates in suitable norms are estabilished. | Sun Tongjun Now address:Department of Mathematics and Physics, South Campus of Shandong University, Jinan 250061.Dept. of Math., South Campus of Shandong Univ.,Jinan 250061. | 2001 | Applied Mathematics(A Journal of Chinese Universities)2001，16，1： | 5 |
| 15 | Preparation of a Cyclomaltoheptaose(β-cyclodextrin) Cross-linked Chitosan Derivative via Glyoxal or Glutaraldehyde显示文摘A cyclomaltoheptaose--cyclodextrin (-CD) crosslinked chitosan derivative via glyoxal or glutaraldehyde was prepared. The structures of -CD crosslined chitosan with glyoxal or glutaraldehyde were characterized by IR spectra. The surface morphology of the -CD crosslinked chitosan particles was examined using a scanning electron microscope. The immobilization capacity of ?CD on chitosan was affected on the weight ratio of -CD/chitosan, the utilization amount of crosslinking agent, the acidity of the reaction system and the temperature. The adsorption for nicotine indicated that the chitosan--CD was a good adsorbent. | Wei Liang XU*, Ji Dong LIU, Yan Ping SUN Department of Chemistry, Zhejiang University, Huajiachi Campus, Hangzhou 310029 | 2003 | Chinese Chemical Letters2003，14，7： | 5 |
| 16 | Littlewood-Paley operators with variable kernels显示文摘In this paper we study a certain directional Hilbert transform and the boundedness on some mixed norm spaces. As one of applications, we prove the Lp-boundedness of the Littlewood-Paley operators with variable kernels. Our results are extensions of some known theorems. | CHEN Jiecheng, DING Yong & FAN Dashan Department of Mathematics, Zhejiang University (Xixi Campus), Hangzhou 310028, China School of Mathematical Sciences, Beijing Normal University, Beijing 100875, China Department of Mathematics, University of Wisconsin-Milwaukee, Milwaukee WI 53201, USA Department of Mathematics, Central China Normal University, Wuhan 430074, China | 2006 | Science China Mathematics2006，49，5： | 4 |
| 17 | Impact of coal resource development on eco-environment and its restoration in west of China显示文摘West China has rich mineral resources, especially in coal resources with very good mining conditions. Coal resource development is the one of important tasks in the Chinese “West Development”. Thus, the impact of coal resources development on eco-environment and its restoration is worth studying. This study shows that there are many environmental problems such as land damage, coal wastes, damage of hydro-geological condition and pollution of water resource, airborne effluents (industrial exhausts and methane emission from underground), dust, waste, water. Land damage and land desertification are the most important environmental issue in west China. Therefore, the stress of environmental restoration should be desert presentation and disturbed-land reclamation. To control environmental damages and rehabilitate the eco-environment, environmental restoration techniques are also discussed. | HU Zhen-qi, ZHAO Yan-ling, GAO Yong-guang (China University of Mining and Technology(Beijing Campus), Beijing 100083, China) | 2005 | 中国有色金属学会会刊:英文版2005，15，S1： | 3 |
| 18 | Comparisons between glucose analogue 2-deoxy-2-(^(18)F)fluoro-D-glucose and ^(18)F-sodium fluoride positron emission tomography/computed tomography in breast cancer patients with bone lesions显示文摘AIM: To compare 2-deoxy-2-(^(18)F)fluoro-D-glucose(^(18)FFDG) and ^(18)F-sodium(^(18)F-NaF) positron emission tomography/computed tomography(PET/CT) accuracy in breast cancer patients with clinically/radiologically suspected or known bone metastases.METHODS: A total of 45 consecutive patients with breast cancer and the presence or clinical/biochemical or radiological suspicion of bone metastatic disease underwent ^(18)F-FDG and ^(18)F-fluoride PET/CT. Imaging results were compared with histopathology when available, or clinical and radiological follow-up of at least 1 year. For each technique we calculated: Sensitivity(Se), specificity(Sp), overall accuracy, positive and negative predictive values, error rate, and Youden's index. Mc Nemar's χ~2 test was used to test the difference in sensitivity and specificity between the two diagnostic methods. All analyses were computed on a patient basis, and then on a lesion basis, with consideration ofthe density of independent lesions on the coregistered CT(sclerotic, lytic, mixed, no-lesions) and the divergent site of disease(skull, spine, ribs, extremities, pelvis). The impact of adding ^(18)F-Na F PET/CT to the work-up of patients was also measured in terms of change in their management due to ^(18)F-Na F PET/CT findings. RESULTS: The two imaging methods of ^(18)F-FDG and ^(18)F-fluoride PET/CT were significantly different at the patient-based analysis: Accuracy was 86.7% and 84.4%, respectively(Mc Nemar's χ~2 = 6.23, df = 1, P = 0.01). Overall, 244 bone lesions were detected in our analysis. The overall accuracy of the two methods was significantly different at lesion-based analysis(Mc Nemar's χ~2 = 93.4, df = 1, P < 0.0001). In the lesion density-based and site-based analysis, ^(18)F-FDG PET/CT provided more accurate results in the detection of CT-negative metastasis(P < 0.002) and vertebral localizations(P < 0.002); ^(18)F-Na F PET/CT was more accurate in detecting sclerotic(P < 0.005) and rib lesions(P < 0.04). ^(18)F-Na F PET/CT led to a change of management in 3 of the 45 patients(6.6%) by revealing findings that were not detected at ^(18)F-FDG PET/CT. CONCLUSION: ^(18)F-FDG PET/CT is a reliable imaging tool in the detection of bone metastasis in most cases, with a diagnostic accuracy that is slightly, but significantly, superior to that of ^(18)F-Na F PET/CT in the general population of breast cancer patients. However, the extremely high sensitivity of ^(18)F-fluoride PET/CT can exploit its diagnostic potential in specific clinical settings(i.e., small CT-evident sclerotic lesions, high clinical suspicious of relapse, and negative ^(18)F-FDG PET and conventional imaging). | Selene Capitanio Francesca Bongioanni Arnoldo Piccardo Claudio Campus Roberta Gonella Lucia Tixi Mehrdad Naseri Michele Pennone Vania Altrinetti Ambra Buschiazzo Irene Bossert Francesco Fiz Andrea Bruno Andrea DeCensi Gianmario Sambuceti Silvia Morbelli | 2016 | World Journal of Radiology2016，8，2： | 3 |
| 19 | A NEW CONJUGATE GRADIENT METHOD AND ITS GLOBAL CONVERGENCE PROPERTIES显示文摘This paper presents a new conjugate gradient method for unconstrained opti-mization. This method reduces to the Polak-Ribiere-Polyak method when line searches areexact. But their performances are differellt in the case of inexact line search. By a simpleexample, we show that the Wolf e conditions do not ensure that the present method and thePolak- Ribiere- Polyak method will pro duce descent direct i0ns even u nder t h e ass umpt ionthat the objective function is Strictly convex. This result contradicts the F0lk axiom thatthe Polak-Ribiere-Polyak with the Wolf e line search should find the minimizer of a strictlyconvex objective function. Finally, we show that there are two ways to improve the newmethod such that it is globally convergent. | LI Zhengfeng CHEN Jing DENG Naiyang(Division of Basic Sciences, China Agricultural University East Campus, Beijing 100083, China) | 1998 | Systems Science and Mathematical Sciences1998，11，1： | 2 |
| 20 | Formation of superthick Al-based amorphous ribbon显示文摘The Al-Ni-La-Ce-Pr-Nd amorphous ribbon with a super-thickness of 140 mm has been produced by the melt spinning technique. The thickness is as twice as that achieved by the melt spinning technique in the corresponding period (the largest thickness of 65 mm). The crystallization was characterized by using a differential scanning calorimetry. The activation energies are calculated based on the Kissinger equation and the effects of the La, Ce, Pr and Nd on the glass forming ability of Al-based alloy are discussed in the paper. | WANG Shenghai, BIAN Xiufang & JIA Yubo Key Lab of Liquid Structure and Heredity of Materials, Ministry of Education of China, South Campus of Shandong University, Jinan 250061, China | 2003 | Chinese Science Bulletin2003，48，19： | 2 |
您所在的机构暂未开通此部分的功能，请联系管理员