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In order to solve the problem of real-time soft tissue torsion simulation in virtual surgeries,a torsion model based on coil spring is proposed to actualize real-time interactions and applications in virtual surgeries. The proposed model is composed of several connected coil springs in series. The sum of torsion deformation on every coil is equivalent to the soft tissue surface deformation. The calculation of the model is simple because the method for calculating the torsion deformation for each coil spring is the same. The virtual surgery simulation system is established on PHANTOM OMNI haptic device based on the Open GL 3 D graphic interface and VC + + software,and it is used to simulate the torsion deformation of virtual legs and arms. Experimental results show that the proposed model can effectively simulate the torsion deformation of soft tissue while being of real-time performance and simplicity,which can well meet requirements of virtual operation simulations. 相似文献
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反计算机取证技术研究 总被引:1,自引:0,他引:1
分析了反计算机取证的基本概念和方法,比较了反计算机取证所采用的数据擦除、数据加密、数据隐藏、数据混淆和数据转换等主要技术,并提出了一种安全、高效的基于m序列的数据擦除方法. 相似文献
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Li De |jia Li Hai |cheng Zou Guo |lin College of Life Sciences Wuhan University Wuhan Hubei China 《武汉大学学报:自然科学英文版》2003,8(3):875-879
0 IntroductionHemoglobin(Hb)isthemajorhemeproteinofredbloodcells(RBCs)andisresponsibleforthetransportofoxygentothetissues.ThefunctionofHbdependsupontheabilityoffer rousironinthehemegrouptobindandreleaseoxygen .Despiteitsprincipalroleasanoxygen carrier,theHbmoleculepossessesdifferentenzymaticactivities[1 ] andamethodwasdevelopedforthedeterminationofHbbasedonitsenzymaticactivityfortheox idationofo phenylenediamine (OPDA)withH2 O2 asanoxi dant[2 ] .Hbasamimeticenzymeofperoxidase ,cancataly… 相似文献
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In the past, people tried to exclude paradoxes only by the developing of multiple-valued logic system rather than the modification of comprehensive principle. Nevertheless, paper[1] proved that any mathematical system which satisfies conditions: 相似文献
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As an analog of the quantum TKK algebra, a twisted quantum toroidal algebra of type A 1 is introduced. Explicit realization of the new quantum TKK algebra is constructed with the help of twisted quantum vertex operators over a Fock space. 相似文献
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Wei Liang XU* Jun WU Chun Ling FU Department of Chemistry Zhejiang University Hua jia chi section Hangzhou 《中国化学快报》2001,(12)
Chitosan has a wide scale of applications1-3. Interestingly, some antibacterial and antifungal activities have been described with chitosan and modified chitosan derivatives4-6. In polycationic biocides, generally, it is reasonably assumed7 that the charge density of the polyelectrolyte increases with increase in the molecular weight of its single coil, which leads to the enhanced adsorption of polycations onto the negatively charged cell surface. This is also favorable for the binding of t… 相似文献
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ZHONG Guangwu ZHANG Jiquan SONG Xianming LU Jie ZHENG Yinjia ZHANG Guangyang WANG Quanming TANG Nianyi DENG Zhongchao DING Xuantong LIU Yong WANG Enyao 《核聚变与等离子体物理》2003,23(3):161-169
1 IntroductionConfinementandheatingofplasmasareele mentarytopicsinfusionresearch .Tocharacterizethefusionplasmasinauxiliaryheatingexperimentsaswellasinohmicheatingexperiments,measure mentofionenergyinplasmasbecomesnecessary .Neutralparticleanalyzersaresuchdevicesthatareaimedatdirectanalysisofneutralparticlesemittedfromfusionplasmasandareusedinmanyfusionresearchlaboratories[1~ 4] .Detailsofparticledi agnosticprincipleforfusionplasmacanbefoundinReference [5].Emissionofneutralparticlesisintrin… 相似文献
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Studies on The Adsorption Capacity for Bilirubin of The Adsorbent Chitosan-β-Cyclodextrin 总被引:3,自引:0,他引:3
Wei Liang XU Chun Ling FU Jun LI Department of Chemistry Zhejiang University Hua jia chi section Hangzhou 《中国化学快报》2001,(4)
Bilirubin is a metabolite of heme from hemoglobin in the blood. Disorders in its successive metabolism or excretion may cause the accumulation of the unconjugated bilirubin in blood of the patients who suffer from hyperbilirubinemia. The accumulation of bilirubin can cause serious tissue damage1,2. Hyperbilirubinemia may be treated by the removal of bilirubin from body. The ways for its removal include phototherapy, orally administered sorbents3 and adsorbents for hemoperfusion. Successful he… 相似文献
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