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By the resultant theory, the E-characteristic polynomial of a real rectangular tensor is defined. It is proved that an E-singular value of a real rectangular tensor is always a root of the E-characteristic polynomial. The definition of the regularity of square tensors is generalized to the rectangular tensors, and in the regular case, a root of the E-characteristic polynomial of a special rectangular tensor is an E-singular value of the rectangular tensor. Moreover, the best rank-one approximation of a real partially symmetric rectangular tensor is investigated. 相似文献
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《海外英语》2003,(12):1
Youth is not a time of life; it is a state of mind; it is not a matter of rosycheeks, red lips and supple(柔韧的)knees; it is a matter of will, a quality of imagination, a vigor of the emotions; it is the freshness of the deep springs of life.Youth means a temperamental predominance(支配,主导)of courage over timidity(胆怯),of the appetite for adventure over the love of ease. This often exists in a man of 60 more than a boy of 20. Nobody grows old merely by a number of 相似文献
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Theatre translation is one of the most neglected areas in the field of translation.Theatre is a special member of the literature family in that it doubles as a branch of the performing art.It follows that the aesthetic constitutions of a dramatic creation is a complex problem. It is the translator’s duty to grasp the artistic features of the literary creation and reproduce them in the version since the most important thing in a piece of literature is its artistic features. 相似文献
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Tracy Jiang 《英语大王(小学)》2003,(1)
Blue is the sky that finally appeared behind a winter of gray。Blue is the silhouette of a bird soaring high in the sky. Blue is the pedals of a newborn flower. Blue is the current of a rushing stream freed from the cold. Blue is the broken shells that revealed the world to twittering robins. 相似文献
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By using ABAQUS/Explicit, the dynamic process of an offshore wind turbine（OWT） stricken by a ship of 5000DWT in the front direction is simulated. The OWT is located on a large-scale prestressing bucket foundation constructed by an integrated installation technique. According to the simulation results, under the ship collision, a cer-tain range of plastic zone appears within a local area of arc transition structure of the bucket foundation, and the con-crete plastic zone is seriously damaged. As the stress level of OWT tower is relatively low, the OWT tower is less af-fected. A great inertial force is generated at the top of the OWT tower as the mass of nacelle and blades is up to 400 t. The displacement of the tower is in the opposite direction of the ship collision at the end of 1 s under the action of iner-tial force. There is only a minor damage in the ship bow. Most of the kinetic energy is transformed into the plastic dissipation and absorbed by the arc transition structure of bucket foundation. 相似文献
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Lu Ling 《阜阳师范学院学报(社会科学版)》1999,(4)
One of the distinguishing featuros of English is its inflections, which experiencedchanges in the different periods. Old English is known as a language of full Inflections,Middle English as a language of leveling inflections and Modern English as a language oflost inflections. The history of English is in part the history of the gradual loss of the inflection system.Definition of inflectionInflection is the process of varying the form of a word to differentiate related meanings or uses. Fo… 相似文献
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Guests of the Nation displays vividly the gravity of the tragic dilemma in which O’Connor’s characters are caught,between military duty and the ancient sancta of the moral law.In this paper,the author analyzes Jeremiah Donovan,the Irish commanding officer,who is seemingly unfriendly and cold-blooded because he delivers the news of the impending executions to Bonaparte,the innocent narrator and also one of the Irish guards and it is Donovan who fires the gun at the execution.To the exterior,he is a cold antagonist who mercilessly murdered the two English hostages.However,Donovan is a character of dualities and as a victim of the war,he is a character full of contradicts.In the interior,Donovan is a character tortured by the conflicts between what is natural and what is unnatural. 相似文献
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李桂真 《读与写:教育教学刊》2011,(4):8-9
This paper is a book report of "Psychology of Language",a book on the field of psycholinguistics written by Carroll,a professor of University of Wiscosin-Superior.In this book report,besides a general summary of the development of psycholinguistics and an introduction of the content of this book,my personal interest in the field of psycholinguistics is also stated,that is,the in-fluence of the syntactic structure upon language comprehension 相似文献
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杨正瓴 《天津大学学报(英文版)》2011,17(6):446-449
The more unambiguous statement of the P versus NP problem and the judgement of its hardness, are the key ways to find the full proof of the P versus NP problem. There are two sub-problems in the P versus NP problem. The first is the classifications of different mathematical problems (languages), and the second is the distinction between a non-deterministic Turing machine (NTM) and a deterministic Turing machine (DTM). The process of an NTM can be a power set of the corresponding DTM, which proves that the states of an NTM can be a power set of the corresponding DTM. If combining this viewpoint with Cantor’s theorem, it is shown that an NTM is not equipotent to a DTM. This means that "generating the power set P(A) of a set A" is a non-canonical example to support that P is not equal to NP. 相似文献
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哈军华 《昆明师范高等专科学校学报》2002,24(1):79-83
Reader-Response Criticism is one of the schools of western literary criticism.The scholars of the school hold the view that literature is a performative art and each reading is a performance,analogous to playing/singing a musical work,enacting a drama,etc.Literature exists only when it is read.They maintain that reading is a transction between the reader and the text,meaning is as dependent upon the reader as it is dependent upon the text.So there is no universal and absolute interpretation of a poem;rather,there can be several probable interpretations.According to their view-point,a literary text possesses no fixed and final meaning and value.Literary meaning and value are “transactional”,“dialogic”,created by the interaction of the reader and the text.In this paper,the writer,with his interpretation of the poem The Road Not Taken by famous American poet Robert Frost,tries to demonstrate that Reader-Response Criticism,in a sense,is reasonable in proving that the reality of the text lies between the reader and the text and in the transaction,it is the readers who bring their world of experience to activate the text. 相似文献
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A A ride in a cable-car is one of the most exciting and enjoyable experiences a child can have. In Switzerland, which is the home of the cable-car, it is used mostly to take tourists up the slope of a mountain, to a restaurant from which one can have a bird's-eye view of the surrounding country, or to the top of ski-run, from which, in winter, skiers glide down the snow-cov- ered slope on skis, in Singapore, however, the cable-car takes one from the summit of a hill on the main island 相似文献
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LIU Guang-hui CHEN Chuan-bo 《浙江大学学报(A卷英文版)》2007,8(8):1210-1217
When the edges of a convex polygon are traversed along one direction,the interior of the convex polygon is always on the same side of the edges. Based on this characteristic of convex polygons,a new algorithm for computing the convex hull of a simple polygon is proposed in this paper,which is then extended to a new algorithm for computing the convex hull of a planar point set. First,the extreme points of the planar point set are found,and the subsets of point candidate for vertex of the convex hull between extreme points are obtained. Then,the ordered convex hull point sequences between extreme points are constructed separately and concatenated by removing redundant extreme points to get the convex hull. The time complexity of the new planar convex hull algorithm is O(nlogh) ,which is equal to the time complexity of the best output-sensitive planar convex hull algorithms. Compared with the algorithm having the same complexity,the new algorithm is much faster. 相似文献
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A novel posture alignment system for aircraft wing assembly 总被引：2，自引：0，他引：2
A novel 6-degree of freedom （DOF） posture alignment system, based on 3-DOF positioners, is presented for the assembly of aircraft wings. Each positioner is connected with the wing through a rotational and adsorptive half-ball shaped end-effector, and the positioners together with the wing are considered as a 3-PPPS （P denotes a prismatic joint and S denotes a spherical joint） redundantly actuated parallel mechanism. The kinematic model of this system is established and a trajectory planning method is introduced. A complete analysis of inverse dynamics is carried out with the Newton-Euler algorithm, which is used to find the desired actuating torque in the design and path planning phase. Simulation analysis of the displacement and actuating torque of each joint of the positioners based on inverse kinematics and dynamics is conducted, and the results show that the system is feasible for the posture alignment of aircraft wings. 相似文献
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The crucial effect of compressibility of rods on their instability is novelly demonstrated via singularity theory. It is shown that the critical load of compressible rod is always greater than the one of the Euler rod, and a subcritical pitchfork bifurcation, which cannot occur for the Euler rod, may occur for a compressible rod. A whole bifurcation diagram of compressible rods is as follows: when the original slenderness ratio of a compressible rod, S0, is smaller than , the rod does not buckle; when ,the rod may undergo a subcritical pitchfork bifurcation and a collapse may occur; when , the rod may undergo a supercritical pitchfork bifurcation. The deformation of cross section of rods causes a little shift of bifurcation points towards to the one corresponding to larger slenderness ratio. 相似文献
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金志刚 《中学数学教学参考》2005,(10):61-61
A hyperbola is the set of all points P（x,y） in the plane such that ｜PF1 - PF2｜ = 2a. Again F1 and F2 are focus points. This time the difference of these distances remain a constant at 2a. The explanation is similar to that of the ellipse. Since the ellipse is the sum of the distances and the hyperbola is the difference of the distances, the equations are very similar. They differ on- ly in the sign and the longest side for a hyperbola is c. （Remember for the ellipse it was a ） 相似文献
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This is a photograph of our village. Our village is in a valley. It is betweenn two hills. The village is on a river. Here is another photograph of the village. My sister and I are walking along the banks of the river. We are on the left. There is a boy i… 相似文献
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The Finnish language is a member of the Finno-Ugrian language family, which is a part of the Uralian languages. Finnish is mainly spoken by five million people. Finnish language is a unique language compared to other European language. It has fifteen different cases, and the inflections occur to many aspects of Finnish grammar. And the free word order is also one of features of Finnish language. The essay focuses on the characteristics of Finnish language in the perspective of inflections and word order. 相似文献
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Pride and Prejudice is a masterpiece by Juan Austen.Generally,Austen is considered one of the two major novelists of the Romantic period in the history of British literature,the other is Walter Scott.But her view of life is totally realistic.She shows the readers the daily life of middle class.This paper investigates different kinds of love and marriages in Pride and Prejudice with feminism,and comes to the conclusion that Jane Austen is a romantic writer as well as a realistic writer. 相似文献