{"currentpage":1,"firstResult":0,"maxresult":10,"pagecode":5,"pageindex":{"endPagecode":5,"startPagecode":1},"records":[{"abstractinfo":"通过对物料加热的热力学分析,建立了低能耗的最优加热准则。以此准则为依据,运用线性二次型性能指标的控制理论,研究了通用的加热过程优化方法。新的优化方法不仅适用于研究物料加热的时变供热问题,也适用于研究分布供热问题。在均热炉上初步应用,结果比较满意。","authors":[{"authorName":"李宗瑞","id":"6dd23688-080d-4d3b-abe8-3d033d69d82a","originalAuthorName":"李宗瑞"},{"authorName":"陆钟武","id":"99a5e825-44e4-4b8d-9f6b-c97e5a930622","originalAuthorName":"陆钟武"}],"categoryName":"|","doi":"","fpage":"78","id":"f90613aa-9624-4010-8441-42401fc0b050","issue":"1","journal":{"abbrevTitle":"JSXB","coverImgSrc":"journal/img/cover/JSXB.jpg","id":"48","issnPpub":"0412-1961","publisherId":"JSXB","title":"金属学报"},"keywords":[{"id":"4f6a8871-f638-41ae-8bed-453f65d01414","keyword":"加热","originalKeyword":"加热"},{"id":"b8686ef2-840a-4c36-9a52-59f558bde8cd","keyword":"<span style=\"color:red\">optimal</span> <span style=\"color:red\">criterion</span>","originalKeyword":"optimal criterion"},{"id":"f8ecc8da-897a-45ad-9fff-3da6786f7a34","keyword":"control theory","originalKeyword":"control theory"},{"id":"961ae214-d140-462b-bf15-010c1dec13a6","keyword":"null","originalKeyword":"null"}],"language":"zh","publisherId":"0412-1961_1991_1_16","title":"物料加热过程的最优准则及优化理论的研究","volume":"27","year":"1991"},{"abstractinfo":"We find that the classical failure criteria, i.e., maximum normal stress <span style=\"color:red\">criterion</span>, Tresca <span style=\"color:red\">criterion</span>, Mohr-Coulomb <span style=\"color:red\">criterion</span>, and von Mises <span style=\"color:red\">criterion</span>, cannot satisfactorily explain the tensile fracture behavior of the bulk metallic glass (BMG) materials. For a better description, we propose an ellipse <span style=\"color:red\">criterion</span> as a new failure <span style=\"color:red\">criterion</span> to unify the four classical criteria above and apply it to exemplarily describe the tensile fracture behavior of BMGs as well as a variety of other materials. It is suggested that each of the classical failure criteria can be unified by the present ellipse <span style=\"color:red\">criterion</span> depending on the difference of the ratio alpha = tau(0)/sigma(0).","authors":[],"categoryName":"|","doi":"","fpage":"","id":"89f106cf-f4fd-48a4-865c-baff24a83f5a","issue":"9","journal":{"abbrevTitle":"PRL","id":"cebd969b-0e74-4af5-8712-e07fde04b32c","issnPpub":"0031-9007","publisherId":"PRL","title":"Physical Review Letters"},"keywords":[{"id":"3c51d406-5d3b-40b7-9dc8-97a3b43e7cf8","keyword":"bulk amorphous-alloys;metallic-glass;yield <span style=\"color:red\">criterion</span>;plastic-flow;strength;ribbons","originalKeyword":"bulk amorphous-alloys;metallic-glass;yield criterion;plastic-flow;strength;ribbons"}],"language":"en","publisherId":"0031-9007_2005_9_1","title":"Unified tensile fracture <span style=\"color:red\">criterion</span>","volume":"94","year":"2005"},{"abstractinfo":"A <span style=\"color:red\">criterion</span> restraining mehod adopted to the dynamic optimization for materials heat- ing process has been developed,by regarding it as controlled object of a regulator in control theory and combining the <span style=\"color:red\">optimal</span> <span style=\"color:red\">criterion</span> of it.The method may be available to optimize fuel supply along furnace length and to provide a theoretical basis for the optimization of fuel supply in time-varying.For soaking pit,the calculation shows that in case of optimization by <span style=\"color:red\">criterion</span> restraining method,the thermal efficiency is 3.1 higher than the modelling prediction result.In comparison with heat flux-decomposing method,the thermal efficiency increased from 43.1 to 43.8%,and the energy consumption was reduced by 7.28% relative to the practical production data.","authors":[{"authorName":"LI Zongrui LU Zhongwu Northeast University of Technology","id":"0d395f0e-cbf7-4441-ba8f-03ffa837ee48","originalAuthorName":"LI Zongrui LU Zhongwu Northeast University of Technology"},{"authorName":"Shenyang","id":"15b30ee2-a44b-4038-9d79-7fbbace467af","originalAuthorName":"Shenyang"},{"authorName":"China","id":"fdd2f3d6-62e3-4ff1-9703-7a60ae5a4563","originalAuthorName":"China"}],"categoryName":"|","doi":"","fpage":"378","id":"89cc4598-5825-4a14-a062-9f68604e0962","issue":"11","journal":{"abbrevTitle":"JSXBYWB","coverImgSrc":"journal/img/cover/amse.jpg","id":"49","issnPpub":"1006-7191","publisherId":"JSXBYWB","title":"金属学报(英文版)"},"keywords":[{"id":"e011da76-4d6a-400d-a6de-d2e7ddaf5d6e","keyword":"optimization","originalKeyword":"optimization"},{"id":"4c233ea7-c6e5-4509-bc68-52a3fdb18116","keyword":"null","originalKeyword":"null"},{"id":"da24cc7c-6be1-4dfc-bf76-1bbd51c3b103","keyword":"null","originalKeyword":"null"},{"id":"b8d69df0-67e5-488d-bc70-514dfaddd302","keyword":"null","originalKeyword":"null"}],"language":"en","publisherId":"1006-7191_1992_11_9","title":"THEORY OF DYNAMIC OPTIMIZATION FOR MATERIALS HEATING PROCESS——<span style=\"color:red\">CRITERION</span> RESTRAINING METHOD","volume":"5","year":"1992"},{"abstractinfo":"The fracture <span style=\"color:red\">criterion</span> of metallic glass (MG) is still under debate so far. On the issue of describing the normal stress effect on the tensile fracture behaviors of MGs, there are two fracture criteria: the Mohr-Coulomb (M-C) <span style=\"color:red\">criterion</span> and the Ellipse <span style=\"color:red\">criterion</span>. In this study, the normal stress acting on the tensile fracture planes was controlled and varied in a wide range by introducing inclined notches with different inclination angles to a series of Zr-based MG specimens. Based on the experimental results, both the Ellipse <span style=\"color:red\">criterion</span> and the M-C <span style=\"color:red\">criterion</span> are compared and analyzed. The experimental results reveal that the Ellipse <span style=\"color:red\">criterion</span> gives a better prediction than the M-C <span style=\"color:red\">criterion</span> for the tensile fracture behavior of the investigated Zr-based MG in a wide normal stress range. Moreover, the pressure and normal stress effects were separately considered and some other criteria were further discussed. It is found that under tensile loading, the pressure effect is weak while the normal stress effect is strong. Combined with previously reported results for a variety of MGs, the Ellipse <span style=\"color:red\">criterion</span> is found to have the capability to describe all the different contributions of the normal stress effect and thus may be suitable as a unified tensile fracture <span style=\"color:red\">criterion</span> for all MGs with different fracture behaviors. (C) 2011 American Institute of Physics. [doi:10.1063/1.3580285]","authors":[],"categoryName":"|","doi":"","fpage":"","id":"a762dc92-aa25-4c27-8b33-1e641b92d5cd","issue":"8","journal":{"abbrevTitle":"JOAP","id":"7dcf8a89-0513-40ee-be2d-759941dcef7e","issnPpub":"0021-8979","publisherId":"JOAP","title":"Journal of Applied Physics"},"keywords":[{"id":"6650b71a-00e2-4526-bde7-1e0848d72433","keyword":"bulk amorphous-alloys;mechanical-properties;plastic-flow;hydrostatic-pressure;shear fracture;yield surface;ni-fe;strength;behavior;indentation","originalKeyword":"bulk amorphous-alloys;mechanical-properties;plastic-flow;hydrostatic-pressure;shear fracture;yield surface;ni-fe;strength;behavior;indentation"}],"language":"en","publisherId":"0021-8979_2011_8_2","title":"Tensile fracture <span style=\"color:red\">criterion</span> of metallic glass","volume":"109","year":"2011"},{"abstractinfo":"The paper is concerned with the dynamic response of impulsively loaded rigid-perfectly plastic structures. By combining the mode approximation technique with the upper and the lower bound theorems, we have derived a set of sequential inequalities on the final displacement of the structure. This can be applied to give a reasonable explanation for the <span style=\"color:red\">criterion</span> of choosing an <span style=\"color:red\">optimal</span> mode proposed by Symonds (1980). In addition, an approximate expression of the final displacement of the structure is suggested in cases where the \"mode approximation\" apparently works poorly. Finally, the suggested expression is also illustrated by examples.","authors":[],"categoryName":"|","doi":"","fpage":"33","id":"ae6090ac-4166-49a7-80d1-e75d1a017d96","issue":"1","journal":{"abbrevTitle":"JOAMOTA","id":"0d807fb1-8d63-430c-bb94-e317a67788df","issnPpub":"0021-8936","publisherId":"JOAMOTA","title":"Journal of Applied Mechanics-Transactions of the Asme"},"keywords":[],"language":"en","publisherId":"0021-8936_1992_1_1","title":"THE <span style=\"color:red\">OPTIMAL</span>-MODE AND AN APPROXIMATE EXPRESSION OF FINAL DISPLACEMENT IN DYNAMIC PLASTIC RESPONSE OF STRUCTURES","volume":"59","year":"1992"},{"abstractinfo":"In this paper, a new linear yield <span style=\"color:red\">criterion</span> expressed by the geometric midline of error triangle between Tresca and Twin shear stress yield loci on the π-plane in Haigh-Westergaard space is introduced. The <span style=\"color:red\">criterion</span> is written in terms of the principal values of stress deviator and called GM yield <span style=\"color:red\">criterion</span> for short. Together with a Cartesian coordinate velocity field different from Avitzur’s, the GM <span style=\"color:red\">criterion</span> is used to get a analytical solution for strip drawing .With working example of the strip drawing through wedge-shaped die, the calculated results of relative drawing stress by the GM <span style=\"color:red\">criterion</span> are compared with those by Mises <span style=\"color:red\">criterion</span> from Avitzur formula. It turns out that the calculated results according to analytical solution of present paper are in good agreement with the numerical solution by Avitzur formula","authors":[{"authorName":"WANG Gen-ji DU Haijun ZHAO De-wen LIU Xiang-hua WANG Guo-dong","id":"84c37891-9cd7-4121-87ad-24ee7baa5976","originalAuthorName":"WANG Gen-ji DU Haijun ZHAO De-wen LIU Xiang-hua WANG Guo-dong"}],"categoryName":"|","doi":"","fpage":"13","id":"d30d1d6a-7443-4f0c-a5e8-ed84127fb3ab","issue":"6","journal":{"abbrevTitle":"GTYJXBYWB","coverImgSrc":"journal/img/cover/GTYJXBEN.jpg","id":"1","issnPpub":"1006-706X","publisherId":"GTYJXBYWB","title":"钢铁研究学报(英文版)"},"keywords":[{"id":"e5c648c8-7356-4f1e-b1c3-f30167e4b1e8","keyword":"GM yield <span style=\"color:red\">criterion</span>;strip drawing;analytical solution","originalKeyword":"GM yield criterion;strip drawing;analytical solution"}],"language":"en","publisherId":"1006-706X_2009_6_6","title":"Application of Geometric Midline Yield <span style=\"color:red\">Criterion</span> for Strip Drawing","volume":"16","year":"2009"},{"abstractinfo":"By expanding the Gibbs free energy of a ternary system into a Taylor series with respect to the composition,a thermodynamic <span style=\"color:red\">criterion</span> of spinodal decomposition is conducted as G_(xx)(δx)2+2G_(xx)δxδy+G_(yy)(δy)~2<0,from which,various conditions of spinodal decomposition are discussed.When G_(xx)<0 G_(xy)~2-G_(xx)G_(yy)<0,it is called unstable decomposition unrestricted by the direction of composition fluctuation;when G_(xx)<0,G_(xy)~2-G_(xx)G_(yy)>0,or G_(xx)>0, G_(xy)~2-G_(xx)G_(yy)>0,as well as G_(xx)=0,are all considered as unstable decomposition restricted by the direction of composition fluctuation δx and δy.The phenomenon of turning round in composition during spinodal decomposition is attempted to be explained from above point of view.The computer calculated ranges of unstable decomposition according to the <span style=\"color:red\">criterion</span> of spinodal decomposition on Cu-Ni-Fe ternary system is consistent with the experimental re- sults obtained from literatures.","authors":[{"authorName":"JIANG Bohong ZHANG Meihua WEI Qing XU Zuyao(T.Y.Hsu) Shanghai Jiaotong University","id":"0b11173d-23e6-4bae-a9e1-9d27360c30de","originalAuthorName":"JIANG Bohong ZHANG Meihua WEI Qing XU Zuyao(T.Y.Hsu) Shanghai Jiaotong University"},{"authorName":"Shanghai","id":"9e51d46b-42f8-495c-9563-5c9fa20c936f","originalAuthorName":"Shanghai"},{"authorName":"China","id":"8e54f681-2ce7-4816-a9e1-3ce8557b88bc","originalAuthorName":"China"}],"categoryName":"|","doi":"","fpage":"75","id":"ae496a4e-887e-4ba7-b3c6-64f79aa5c310","issue":"8","journal":{"abbrevTitle":"JSXBYWB","coverImgSrc":"journal/img/cover/amse.jpg","id":"49","issnPpub":"1006-7191","publisherId":"JSXBYWB","title":"金属学报(英文版)"},"keywords":[{"id":"cb1424d0-27b6-45df-985b-b922230c1db9","keyword":"spinodal decomposition","originalKeyword":"spinodal decomposition"},{"id":"5e960090-b048-427f-b9c9-c42c73ea203a","keyword":"null","originalKeyword":"null"},{"id":"4e380f80-a01a-4f69-982d-d8cbe236a3d8","keyword":"null","originalKeyword":"null"}],"language":"en","publisherId":"1006-7191_1991_8_8","title":"THERMODYNAMIC <span style=\"color:red\">CRITERION</span> OF SPINODAL DECOMPOSITION IN TERNARY SYSTEMS","volume":"4","year":"1991"},{"abstractinfo":"A fracture <span style=\"color:red\">criterion</span> derived from a microscopic\npoint of view is proposed and has proved to be effective in the\nanalysis of uniaxial tension. On the one hand, a method of\npredicting a ductile fracture is proposed using a three-dimensional\nvoid model and the assumption of velocity discontinuity. The\nrelationship between the void volume fraction and the critical\nstrain to fracture, calculated with the help of the new model, shows\nthe same tendency as that obtained from the modified Thomason model.\nOn the other hand, the mechanical and metallographic analyses of the\nuniaxial tension experiment are performed using four kinds of carbon\nsteel. The relationship between the void volume fraction and the\ncritical strain to fracture, calculated from the new model, agrees\nbetter with the result obtained from the experiment, rather than\nthat calculated by the modified Thomason model, which confirms the\nvalidity of the ductile fracture <span style=\"color:red\">criterion</span> based on the\nthree-dimensional void model.","authors":[{"authorName":"J.K. Huang","id":"fae17d9c-6424-4c78-8277-3d1d69c67a6b","originalAuthorName":"J.K. Huang"},{"authorName":" X.H. Dong","id":"72d58be5-4430-40a9-ad5f-1c3f79e4ed9d","originalAuthorName":" X.H. Dong"}],"categoryName":"|","doi":"","fpage":"227","id":"e8125472-88d8-468d-85a2-3586c270f4d7","issue":"3","journal":{"abbrevTitle":"JSXBYWB","coverImgSrc":"journal/img/cover/amse.jpg","id":"49","issnPpub":"1006-7191","publisherId":"JSXBYWB","title":"金属学报(英文版)"},"keywords":[{"id":"7237a29e-6c3c-48c1-b5e8-1d0fe26723cd","keyword":"Fracture <span style=\"color:red\">criterion</span>","originalKeyword":"Fracture criterion"},{"id":"7a7b846f-1b6e-4614-85c3-35b03448ad12","keyword":"null","originalKeyword":"null"},{"id":"971d9a28-e167-428b-aca8-d8be6ec1056b","keyword":"null","originalKeyword":"null"},{"id":"73ca58b7-9b57-4fbc-8b47-6de0a06655a0","keyword":"null","originalKeyword":"null"}],"language":"en","publisherId":"1006-7191_2008_3_11","title":"A Ductile Fracture <span style=\"color:red\">Criterion</span> Based On Threedimensional Void Model","volume":"21","year":"2008"},{"abstractinfo":"The <span style=\"color:red\">criterion</span> for shrinkage cavity and porosity prediction of casting, G/T<K,is an empirical formula used widely in practice. However, its physical meaning is not evident and lacks proper dimensional relation.The empirical <span style=\"color:red\">criterion</span> does not include the factor of alloy element segregation. The <span style=\"color:red\">criterion</span> for the prediction of shrinkage cavity and porosity defects in castings has been derived as: G/T<A /DL or G/R<B. △T/DL. In addition, its physical meaning as well as dimension is discussed. It is worth noting that by using this theoretical <span style=\"color:red\">criterion</span> the influence of section thickness on the critical value K is clarified.","authors":[{"authorName":"B.Q. Jio and B. C. Liu(Department of Mechanical Engineering","id":"ae7d9a39-edd5-4fee-b02b-b4d3a63f3576","originalAuthorName":"B.Q. Jio and B. C. Liu(Department of Mechanical Engineering"},{"authorName":"Tsinghua University","id":"30da4940-7db8-4d34-b9b9-a081c61d1235","originalAuthorName":"Tsinghua University"},{"authorName":" Beijing 100084","id":"203abda1-e9e3-4d64-a534-83c077719ff4","originalAuthorName":" Beijing 100084"},{"authorName":"ChinaManuscript received 10 October 1995)","id":"d60a1552-0007-40ea-8b19-9148a43a36f4","originalAuthorName":"ChinaManuscript received 10 October 1995)"}],"categoryName":"|","doi":"","fpage":"310","id":"742b0e5b-88cf-4723-9a7f-4933deb4242b","issue":"4","journal":{"abbrevTitle":"JSXBYWB","coverImgSrc":"journal/img/cover/amse.jpg","id":"49","issnPpub":"1006-7191","publisherId":"JSXBYWB","title":"金属学报(英文版)"},"keywords":[{"id":"4e5d58d2-4614-455c-8eef-99e7df976a8e","keyword":":shrinkage pore","originalKeyword":":shrinkage pore"},{"id":"7c2e2e41-ba0d-4ba7-93e0-d0e9fb04621d","keyword":"null","originalKeyword":"null"},{"id":"642c8e22-869a-4609-b571-3e22a8746d39","keyword":"null","originalKeyword":"null"},{"id":"779e9322-11e7-45b4-919e-470ad6e85b90","keyword":"null","originalKeyword":"null"},{"id":"bbe57041-8851-4f76-bb66-2461e09a351e","keyword":"null","originalKeyword":"null"}],"language":"en","publisherId":"1006-7191_1996_4_1","title":"THEORETICAL DERIVATION OF <span style=\"color:red\">CRITERION</span> G/ FOR PREDICTION OF SHRINKAGF CAVITIES AND POROSITIES IN CASTINGS","volume":"9","year":"1996"},{"abstractinfo":"An analytic expression for the ionization amplitude of hydrogen by electron impact is found to contain a polynomial by an <span style=\"color:red\">optimal</span> truncation in an asymptotic series and a convergent series. The ionization amplitude, i.e., the transition matrix element on the energy shell, is decomposed into two parts: the structure-scattering factor and correlation factor, based on an approximation of the projectile plane wave in coplanar asymmetric geometries. The contribution of these factors to the triple differential cross section is evaluated Using the method of optional truncation of asymptotic and convergent series.","authors":[],"categoryName":"|","doi":"","fpage":"1244","id":"ac57f692-c9e7-48f7-8200-4b07f01b2972","issue":"8","journal":{"abbrevTitle":"CPL","id":"5ed132a3-239d-489d-851e-c3369888be98","issnPpub":"0256-307X","publisherId":"CPL","title":"Chinese Physics Letters"},"keywords":[{"id":"3cf56e92-6501-4356-affa-26f6154ec51a","keyword":"shell ionization;cross-sections;scattering;atoms","originalKeyword":"shell ionization;cross-sections;scattering;atoms"}],"language":"en","publisherId":"0256-307X_2003_8_1","title":"<span style=\"color:red\">Optimal</span> truncation in ionization of hydrogen by electron impact","volume":"20","year":"2003"}],"totalpage":35,"totalrecord":345}