分段齿形扎切加肛管塑形法治疗环状混合痔的手术体会

本科采用扎切加肛管塑形法治疗环状混合痔 ,使肛门平整 ,避免单纯分段齿形结扎后残留的痔 ,而造成痔疮复发和肛门不平 ;同时可避免了环切术引起的后遗症 ,治疗 10 9例 。

陈琦椅上塑形法

中老年人在生理和心理上都产生了一定的变化。在进行体育锻炼时,要制订一定的训 练计划,循序渐进、持之以恒,不宜过量训练或三天打鱼两天晒网。 对于进入中老年的人群来说,个体的差异比较大,在选择运动项目时,可根据自身的特点来选择有一定针对性的运动方式。 进行有氧运动,可增强氧的利用,改善心肺功能。训练时,动作的幅度不宜过大,遵循小负荷、长时间的训练原则,利用科学的有氧训练,使您在消除身体多余赘肉的同时,保持健康的体魄。 下面,我就向大家介绍一组简单易学的“陈琦椅上塑形法”,你只要抽空儿在家中找把椅子,照此方法锻炼3—4次,一定会让您已经偷偷跑出来的肥肉,羞愧地溜回去。

改良游离腓骨瓣塑形方法修复双侧下颌骨缺损

【目的】探讨游离腓骨瓣修复双侧下颌骨巨大缺损的改良方法。【方法】对7例因不同原因造成的跨中线的双侧下颌骨巨大缺损患者,应用游离腓骨瓣重建下颌骨,在腓骨瓣的制备、塑形和定位固定等方面进行改良。【结果】移植腓骨瓣全部成活,固位稳定。随访6个月至2年,面下部外形恢复良好,上下颌相对位置正常,接受活动义齿修复后咬合关系和咀嚼功能较满意。【结论】改良的腓骨复合组织瓣克服了常规方法的缺陷,对腓骨瓣的损伤更轻微,对血供损害更小。

现代正向训练(塑形法)在动物行为学中的应用原则

现代正向训练法区别于以往的老式训练理念和操作的最大不同就是将训练师控制、要求、甚至是强迫受训对象来完成训练,彻底颠覆为训练师通过事先的分析、计划、准备等工作,让受训对象能够非常简单、自愿、且充满愉悦地完成训练工作。这种已尊重、爱护、保护训练对象的新式训练理念现已被广泛地应用到了对于各种动物甚至是人类的训练培训中来。本论文主要阐述的是塑形法在动物行为学中的应用原则。

真皮帽塑形双环法切口巨乳缩小术

目的：探讨一种不留瘢痕，乳房形态良好的术式。方法：应用双环法切口，真皮帽塑形行巨乳缩小术4例。结果：4例效果满意。结论：本法具有其他巨乳缩小术式无法比拟的优越性，有临床推广应用价值。

具有定向孔隙结构的大孔磷酸钙骨水泥支架的制备与表征(英文)

利用冷冻塑形法制备了具有定向孔隙结构的大孔磷酸钙骨水泥支架。利用扫描电镜(scanning electron microscope,SEM)和X射线衍射(X-ray diffraction,XRD)对材料的孔隙结构和物相进行了研究。SEM照片显示:多孔磷酸钙骨水泥具有与冰晶生长方向一致的相互连通的大孔。开口大孔的尺寸在径向能达到150～200μm,在轴向能达到500～1000μm。孔隙的大小可以通过改变冷冻参数进行调节。XRD谱显示:多孔磷酸钙骨水泥中的主要相为弱结晶的羟基磷灰石。材料的孔隙率可以通过调整液固比在70%到90%之间进行调节。实验制备的大孔磷酸钙骨水泥支架是很有希望的骨组织工程支架材料。

PICC更换贴膜的护理要点

目的:减轻护士工作重复性,延长导管留置时间,妥善固定贴膜,预防和减少伤口感染。方法:将笔者所在医院采取贴膜塑形法更换贴膜的28例患者作为观察组,将以往采取传统方法更换贴膜的23例患者作为对照组,对比两组护理效果及患者满意度。结果:观察组皮肤压痕及黏贴不紧密有空隙的发生率显著低于对照组(P<0.01);观察组患者总满意率为92.86%,对照组患者总满意率为52.17%,观察组患者满意率显著优于对照组(P<0.01)。结论:贴膜塑形法可有效预防或降低感染发生率,固定更加牢固可于临床护理中推广应用。

Equal channel angular extrusion of NiTi shape memory alloy tube

As a new attempt, equal channel angular extrusion （ECAE） of nickel-titanium shape memory alloy （NiTi SMA） tube was investigated by means of process experiment, finite element method （FEM） and microscopy. NiTi SMA tube with the steel core in it was inserted into the steel can during ECAE of NiTi SMA tube. Based on rigid-viscoplastic FEM, multiple coupled boundary conditions and multiple constitutive models were used for finite element simulation of ECAE of NiTi SMA tube, where the effective stress field, the effective strain field and the velocity field were obtained. Finite element simulation results are in good accordance with the experimental ones. Finite element simulation results reveal that the velocity field shows the minimum value in the corner of NiTi SMA tube, where severe shear deformation occurs. Microstructural observation results reveal that severe plastic deformation leads to a certain grain orientation as well as occurrence of substructures in the grain interior and dynamic recovery occurs during ECAE of NiTi SMA tube. ECAE of NiTi SMA tube provides a new approach to manufacturing ultrafine-grained NiTi SMA tube.

Prediction of grain scale plasticity of NiTi shape memory alloy based on crystal plasticity finite element method

Grain scale plasticity of NiTi shape memory alloy(SMA)during uniaxial compression deformation at 400℃was investigated through two-dimensional crystal plasticity finite element simulation and corresponding analysis based on the obtained orientation data.Stress and strain distributions of the deformed NiTi SMA samples confirm that there exhibits a heterogeneous plastic deformation at grain scale.Statistically stored dislocation(SSD)density and geometrically necessary dislocation(GND)density were further used in order to illuminate the microstructure evolution during uniaxial compression.SSD is responsible for sustaining plastic deformation and it increases along with the increase of plastic strain.GND plays an important role in accommodating compatible deformation between individual grains and thus it is correlated with the misorientation between neighboring grains,namely,a high GND density corresponds to large misorientation between grains and a low GND density corresponds to small misorientation between grains.

Determination of work-hardening exponent for sheet metal using three-point method

Three characteristic points in the deformation history of a fractured tensile specimen are selected tocalculate two values of n( n1 and n2 ) to represent the hardening ability of material during the homogeneous plas-tic deformation and the following large plastic deformation. Experimental results obtained with mild streel andred copper show that n determined using the three-point method proposed is better to describe the hardening a-bility of material. It is therefore concluded that three-point method can be used to describe the hardening prop-erty of material during both homogeneous deformation and large plastic deformation.

Mechanical behavior and deformation mechanism of ballast bed with various fouling materials

In order to study the interaction between various fouling particles and ballast,a multi-layer and multi-scale discrete element model(DEM)including the sleeper,ballast bed and the surface layer of subgrade was developed.Two typical fouling particles,the hard particles(sand)and soft ones(coal fines),are considered.A support stiffness test of the ballast bed under various fouling conditions was conducted to calibrate the microscopic parameters of the contact model.With the model,the influence of fouling particles on the mechanical behavior and deformation of the ballast bed was analyzed from macro and micro perspectives.The results show that the increase in the strength of the fouling particles enlarges the stiffness of the ballast bed.Hard particles increase the uniformity coefficient of the contact force bondγof ballast by 50.4%.Fouling particles increase the average stress in the subgrade,soft particles by 2 kPa and hard particles by 1 kPa.Hard particles can reduce the elasticity,plastic deformation and energy dissipation in the track structure.As the fouling particle changes from hard to soft,the proportion of the settlement in ballast bed increases to 40.5%and surface layer of swbgrade settlement decreases to 59.5%.Thus,the influence of fouling particles should be considered carefully in railway design and maintenance.

Numerical Analysis of Finite Deformation of Overbroken Rock Mass in Gob Area Based on Euler Model of Control Volume

The overbroken rock mass of gob areas is made up of broken and accumulated rock blocks compressed to some extent by the overlying strata. The beating pressure of the gob can directly affect the safety of mining fields, formarion of road retained along the next goaf and seepage of water and methane through the gob. In this paper, the software RFPA＇2000 is used to construct numerical models. Especially the Euler method of control volume is proposed to solve the simulation difficulty arising from plastically finite deformations. The results show that three characteristic regions occurred in the gob area： （1） a naturally accumulated region, 0-10 m away from unbroken surrounding rock walls, where the beating pressure is nearly zero; （2） an overcompacted region, 10-20 m away from unbroken walls, where the beating pressure results in the maximum value of the gob area; （3） a stable compaction region, more than 20 m away from unbroken walls and occupying absolutely most of the gob area, where the beating pressures show basically no differences. Such a characteristic can exolain the easy-seeoaged “O”-ring phenomena around mining fields very well.

Creating Technology and Numerical Analysis of Warm Plastic Forming for Non-symmetrical Axostyle

A creating technology of the part forming was discussed and finite volume method(FVM)was used to simulate the forming process of the non-symmetrical axostyle spring core-bar.The results show that the no-even radial flange on the top part of the eccentric peachy surface can remarkably block the metal flow and the eccentric peachy can be filled contentedly.Increasing the radius of punch near the inner pocket,the head bulge also can be filled contentedly.The temperature distribution in the part and the forming force,which helps to decide the forming temperature and to select the equipment,was also analyzed.The comparison between the simulation and the experiment result shows that they are accordant.

Simulation of bulk metal forming processes using one-step finite element approach based on deformation theory of plasticity

The bulk metal forming processes were simulated by using a one-step finite element(FE)approach based on deformation theory of plasticity,which enables rapid prediction of final workpiece configurations and stress/strain distributions.This approach was implemented to minimize the approximated plastic potential energy derived from the total plastic work and the equivalent external work in static equilibrium,for incompressibly rigid-plastic materials,by FE calculation based on the extremum work principle.The one-step forward simulations of compression and rolling processes were presented as examples,and the results were compared with those obtained by classical incremental FE simulation to verify the feasibility and validity of the proposed method.

Slope analysis based on local strength reduction method and variable-modulus elasto-plastic model

Employing an ideal elasto-plastic model,the typically used strength reduction method reduced the strength of all soil elements of a slope.Therefore,this method was called the global strength reduction method(GSRM).However,the deformation field obtained by GSRM could not reflect the real deformation of a slope when the slope became unstable.For most slopes,failure occurs once the strength of some regional soil is sufficiently weakened; thus,the local strength reduction method(LSRM)was proposed to analyze slope stability.In contrast with GSRM,LSRM only reduces the strength of local soil,while the strength of other soil remains unchanged.Therefore,deformation by LSRM is more reasonable than that by GSRM.In addition,the accuracy of the slope's deformation depends on the constitutive model to a large degree,and the variable-modulus elasto-plastic model was thus adopted.This constitutive model was an improvement of the Duncan–Chang model,which modified soil's deformation modulus according to stress level,and it thus better reflected the plastic feature of soil.Most importantly,the parameters of the variable-modulus elasto-plastic model could be determined through in-situ tests,and parameters determination by plate loading test and pressuremeter test were introduced.Therefore,it is easy to put this model into practice.Finally,LSRM and the variable-modulus elasto-plastic model were used to analyze Egongdai ancient landslide.Safety factor,deformation field,and optimal reinforcement measures for Egongdai ancient landslide were obtained based on the proposed method.

The study of slip line field and upper bound method based on associated flow and non-associated flow rules

At present, associated flow rule of traditional plastic theory is adopted in the slip line field theory and upper bound method of geotechnical materials. So the stress characteristic line conforms to the velocity line. It is proved that geotechnical materials do not abide by the associated flow rule. It is impossible for the stress characteristic line to conform to the velocity line. Generalized plastic mechanics theoretically proved that plastic potential surface intersects the Mohr-Coulomb yield surface with an angle, so that the velocity line must be studied by non-associated flow rule. According to limit analysis theory, the theory of slip line field is put forward in this paper, and then the ultimate beating capacity of strip footing is obtained based on the associated flow rule and the non-associated flow nile individually. These two results are identical since the ultimate bearing capacity is independent of flow role. On the contrary, the velocity fields of associated and non-associated flow rules are different which shows the velocity field based on the associat- ed flow rule is incorrect.

Press cutting of thin-walled round pipe for producing curvilinear end

In order to obtain a basic understanding of the unwanted distortions in the pipe wall during the press cutting process, the deformation of a thin-walled round pipe to form a curvilinear end was numerically and experimentally studied. Vector analysis was used to study the relationship between the punch shape and the collapse of the cut-end. Stamping experiments on AISI 1020 steel pipe were conducted using different angles a and β defining the shape of the punch. The elasto-plastic finite element method that allows consideration of a ductile fracture was also employed to study the process. The results show that the deformation of the pipe end after press cutting is inβuenced mostly by the shape of the punch. A satisfactory quality of the curvilinear end of the pipe can be obtained if the appropriate geometric parameters of the punch are chosen. The pipe-wall collapse in the upper part of the section is decreased when a and β increase. The recommended values for a and β lie within 30°-50°. The hole on the underside of the punch has less inβuence on the quality of the cut-end, and the wall distortion and the generation of burr on the cut-end can be satisfactorily simulated using the fracture criterion of Brozzo or the normalized criterion of Cockcroft and Latham.

智能矫姿带

该产品是特别打造的，是集舒适、透气、轻便、随体等全方位于一体的智能调节矫姿工具。它以独创的3X交叉塑形矫姿法，对肩、背、腰、侧肋全方位360度均衡施力。