標(biāo)題: Titlebook: Ultrasonic Testing of Materials; Josef Krautkr?mer,Herbert Krautkr?mer Book 19833rd edition Springer-Verlag Berlin Heidelberg 1983 Materia [打印本頁] 作者: 揭發(fā) 時間: 2025-3-21 18:04
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書目名稱Ultrasonic Testing of Materials讀者反饋學(xué)科排名
作者: Diaphragm 時間: 2025-3-21 20:34
Josef Krautkr?mer,Herbert Krautkr?merhrombosis, but also for its relevance to the causation and manage- ment of bleeding disorders. Our understanding of the pathological events leading to thrombus formation or abnormal bleeding depends on knowledge of the basic physiology of the hemostatic system. A number of excellent multiauthor text作者: Expressly 時間: 2025-3-22 02:03
Josef Krautkr?mer,Herbert Krautkr?merntribute a review to the Ergebnisse der Physiologie. As originally planned, it was to be relatively short. However, the interest and scope of the whole subject of synapses stimulated me to write a much more comprehensive and extensive account. I was not even then satisfied, particularly as so many n作者: legacy 時間: 2025-3-22 04:44
Josef Krautkr?mer,Herbert Krautkr?mer1950s and early 1960s made it clear that drinking behavior could be affected by direct manipulations of the brain, especially by brain damage and by pharmacological treat- ments. Since that. time experimental approaches have diversified and the research enterprise has attracted the interest of a bro作者: Dysarthria 時間: 2025-3-22 12:17
Josef Krautkr?mer,Herbert Krautkr?merng via the single neuron to a subcellular level; on the other, clinicians are studying the function ofthe human urinary system in vivo as a whole. A special effort must be made over the next decade to bridge this gap. We hope that the information summarized here will catalyse the process. In 1968, d作者: backdrop 時間: 2025-3-22 14:13 作者: BIDE 時間: 2025-3-22 19:05
Josef Krautkr?mer,Herbert Krautkr?merin color are used extensively throughout the text, helping to establish the relation between quantum mechanics—wave functions, interference, atomic structure, and so forth—and classical physics—point mechanics, statistical mechanics, and wave optics. Even more important, by studying the pictures in 作者: anesthesia 時間: 2025-3-22 22:04 作者: Atmosphere 時間: 2025-3-23 04:01 作者: 雪崩 時間: 2025-3-23 06:16
Josef Krautkr?mer,Herbert Krautkr?merfindings in plant genomics can be used to improve plant breePigeonpea .(Cajanus cajan) .is a crop of small land holding farmers in arid and semi-arid regions of the world. It has a number of usages starting from protein rich food to vegetarian families; fuel wood; nitrogen supplier to soil; recyclin作者: conduct 時間: 2025-3-23 09:54
Josef Krautkr?mer,Herbert Krautkr?merne to Sydney. His pilgrimage delivered 34 .Signposts., a collection of insights which hold the promise to guide us to a better place to work. ..?? ..While firmly positioned within the shifting context of work, the Signposts point away from reactive solutions with a short shelf life. Instead, these m作者: depreciate 時間: 2025-3-23 17:40 作者: 減弱不好 時間: 2025-3-23 20:31 作者: 玷污 時間: 2025-3-23 23:18 作者: buoyant 時間: 2025-3-24 04:03
Josef Krautkr?mer,Herbert Krautkr?merilable on man. The book is divided broadly into two sections. The first covers the current knowledge of the principal components contributing to the hemostatic process; the second examines the changes in these com- ponents induced by physiological events, and details an accumula- tion of information not previ978-1-4684-7321-6978-1-4684-7319-3作者: Hiatal-Hernia 時間: 2025-3-24 09:18
Josef Krautkr?mer,Herbert Krautkr?merr were to make the claim that this book is the fruit of a life-time of enquiry into the physiology of synapses. In 1927 the subject of Excitatory and Inhibitory Synapses was chosen for investigation in the course leading to the Oxford D. Phil. But there have been such remarkable developments during 作者: 愚蠢人 時間: 2025-3-24 14:30 作者: 消毒 時間: 2025-3-24 16:24
Josef Krautkr?mer,Herbert Krautkr?merwas open to criticism because of lack of precise control over what was actually being destroyed or stimulated. Much of this earlier work was reviewed in an authoritative volume by Bors and Comarr in 1971, entitled Neurolqgical Urology. The 16 years have seen great advances in our understanding ofthe作者: hegemony 時間: 2025-3-24 20:18 作者: Antecedent 時間: 2025-3-25 02:33 作者: Acquired 時間: 2025-3-25 03:45
Josef Krautkr?mer,Herbert Krautkr?merputer-generated solutions of the Schr dinger equation for one- and three-dimensional systems. The situations discussed range from the simple particle in a box through resonant scattering in one dimension to the hydrogen atom and Regge classification of resonant scattering. This edition has been thoroughly rev978-1-4684-0233-9作者: 宮殿般 時間: 2025-3-25 10:41 作者: Graphite 時間: 2025-3-25 11:53 作者: 吹氣 時間: 2025-3-25 16:53 作者: Creditee 時間: 2025-3-25 21:34
Wavesel of an elastic body can be visualized as shown in Fig. 1.2, but three-dimensionally. Provided such a body is not stressed by compression or tension beyond its elastic limit, it behaves like this spring model. In it, the particles can perform elastic oscillations. How then does a wave arise from an作者: 有權(quán) 時間: 2025-3-26 03:24 作者: 凹室 時間: 2025-3-26 07:23
http://image.papertrans.cn/u/image/940566.jpg作者: Generalize 時間: 2025-3-26 11:26 作者: Conclave 時間: 2025-3-26 15:43 作者: Modify 時間: 2025-3-26 18:46 作者: 形上升才刺激 時間: 2025-3-27 00:50
Intensity Methodstrasonic waves for non-destructive testing. It dates back to 1930 and was originated by Sokolov and Mühlh?user [686, 523]. The principle is shown in Fig. 9.1 in which the intensity method is portrayed schematically by passing sound through a test plate, at a flawless and alternately at a defective point.作者: 極端的正確性 時間: 2025-3-27 04:30 作者: 憤慨一下 時間: 2025-3-27 07:26
Coupling, Choice of Probe and Measuring Frequencythe method applied, making it necessary to first prepare the surface. On the other they have a decisive influence on the wear of the probe used for continuous and routine tests if in direct contact with the specimen. The surface conditions, therefore, greatly influence the economics of testing.作者: 準(zhǔn)則 時間: 2025-3-27 11:36
Interference Effect of Boundaries. Complex Sound Paths and Screen Patterns becoming very complicated and interpretation of the screen picture more difficult. The principles of wave propagation discussed in Chapter 2 will therefore be applied to a few frequently occurring cases.作者: harpsichord 時間: 2025-3-27 15:45
Echo and Shadow of an Obstacle in the Sound Fieldore defects are classified according to their dimensions transverse to the beam, as large or small defects. The designation . of course constitutes no evaluation of the seriousness of the defect in respect of the usefulness of the test object concerned.作者: 出價 時間: 2025-3-27 19:20 作者: 大看臺 時間: 2025-3-27 23:06 作者: PHAG 時間: 2025-3-28 04:23 作者: 嬰兒 時間: 2025-3-28 07:30 作者: 使聲音降低 時間: 2025-3-28 13:25 作者: 有惡意 時間: 2025-3-28 17:18
Introductionspace knows no sound because it is the particles of matter themselves which vibrate, in contrast for instance to the oscillations of light or other electromagnetic waves where the electric and magnetic state of the space oscillates. In air a sound wave moves a discrete volume of air back and forth a作者: 稱贊 時間: 2025-3-28 21:27
Wavesanical wave is composed of oscillations of discrete particles of material. The motion carried out by a small mass attached to a spring as shown in Fig. 1.1 if pulled down once and released, is called an oscillation. Left to itself, the mass oscillates about the equilibrium position. The nature of th作者: 衍生 時間: 2025-3-29 02:26 作者: 引導(dǎo) 時間: 2025-3-29 05:07
Geometric Ultrasonic Opticsvery clear presentation, e.g. of the effect of mirrors and lenses with curved surfaces. Also we have already used this convenient method, e.g. when discussing reflection and refraction in Chapter 2. In this connection it should, however, not be overlooked that this method fails to take into account 作者: 傲慢物 時間: 2025-3-29 10:15
Wave Physics of Sound Field. The Sound Beam a plate which transmits to the particles of the contiguous material its own longitudinal or transverse motion, viz. over its entire surface with the same phase and amplitude. If such an oscillator is mounted in an extended, rigid wall whence it radiates into a liquid, a sound field is obtained simi作者: Wallow 時間: 2025-3-29 12:55 作者: 揭穿真相 時間: 2025-3-29 16:33
Attenuation of Ultrasonic Waves in Solidss show no attenuation whatever of the sound pressure along its path, and a spherical wave, or the sound beam of a probe in the far-field, would merely decrease inversely with the distance from the source. Natural materials, however, all produce a more or less pronounced effect which further weakens 作者: 你敢命令 時間: 2025-3-29 23:44
Piezoelectric Methods of Generation and Reception of Ultrasonic Waveson except that they are excited in the material concerned by the contact face of a . which oscillates with the desired waveform and frequency. For detection a . has been assumed which likewise has a contact face and which is capable of measuring the sound pressure of an incident wave. Both devices a作者: ASSET 時間: 2025-3-30 00:50
Other Methods for Transmitting and Receiving Ultrasoundals than obtainable by the piezoelectric effect, they nevertheless offer a number of advantages which in special cases make their application in the testing of materials useful. In the case of many of these effects the energy is transmitted by electrical or magnetic fields which in principle make me作者: STEER 時間: 2025-3-30 04:42 作者: 過去分詞 時間: 2025-3-30 12:18
Pulse-Echo Methodder water. A suggestion by Richardson to locate icebergs at some distance by this method found practical realisation through Langevin in locating ships, particularly submarines. In peace time it was used in the form of Behm’s depth sounder for measuring depths at sea, but only during World War II wa作者: INCUR 時間: 2025-3-30 14:57
Transit-Time Method a given distance belong to one and the same group. All these methods are used primarily for wall-thickness measurements and for locating flaws in plates and tubes. It is thus logical to combine the pulse methods and the previously separately treated resonance methods which likewise produce a resona作者: Fibrillation 時間: 2025-3-30 16:43 作者: 用肘 時間: 2025-3-30 23:43 作者: SHOCK 時間: 2025-3-31 02:44
Interference Effect of Boundaries. Complex Sound Paths and Screen Patterns becoming very complicated and interpretation of the screen picture more difficult. The principles of wave propagation discussed in Chapter 2 will therefore be applied to a few frequently occurring cases.作者: handle 時間: 2025-3-31 08:54
Testing by Means of Transverse, Surface and Plate Wavesinal waves their chief advantage here is that if incident at angles greater than 33° in steel (30° in aluminium) they are totally reflected without being split. In such specimens they can therefore travel long distances provided the roughness of the surface is small compared with the wave length so 作者: ACRID 時間: 2025-3-31 09:41
Interference by External High-Frequency and Ultrasonic Sourcesnce, however, certain remedies of general validity apply. If several adjacent pulse instruments with not exactly identical repetition frequencies are used, the pulses are transmitted from one instrument to the other electrically and they travel over the image. This requires synchronisation of the re作者: Occupation 時間: 2025-3-31 15:03 作者: 可耕種 時間: 2025-3-31 20:46
Piezoelectric Methods of Generation and Reception of Ultrasonic Wavesre referred to in materials testing as a .,or transducer, and where applicable as a transmitting probe or a receiving probe. We shall now discuss its mode of operation, which is based almost exclusively on the piezoelectric effect. Other methods for generating ultrasonics are discussed in Chapter 8.作者: Supplement 時間: 2025-3-31 23:54
Testing by Means of Transverse, Surface and Plate Wavesthat losses by scatter reflections do not occur. The effect of surface roughness, however, decreases as the angle of incidence becomes larger. In addition the amplitude decreases only according to the law of distance (divergence of beam) and the attenuation of the material for transverse waves.作者: Apoptosis 時間: 2025-4-1 04:23 作者: Thyroiditis 時間: 2025-4-1 09:49 作者: 沙草紙 時間: 2025-4-1 10:26
Other Methods for Transmitting and Receiving Ultrasoundompared with the piezoelectric oscillator, which is coupled to the workpiece, the surface of the work piece forms in the case of these “direct” methods a part of the acoustic transducer. The direct or dry methods thus require no coupling medium, so avoiding some of the difficulties analysed in the next paragraph.作者: BARB 時間: 2025-4-1 16:29 作者: LIMIT 時間: 2025-4-1 20:13
Handbook of International Feminismsas“ wird verarbeitet?) auch das . (?wie“ ist zu verarbeiten?) ver?ndern und auswechseln zu k?nnen, wird ein und derselbe Computer (unver?nderte Technik = .) zum universellen Probleml?sungsinstrument (ver?nderbare Programme = .).作者: grandiose 時間: 2025-4-1 22:55
