silas marner the weaver of raveloe part 2

... West. They consist of 6 best people, Arthur could find. Their main aim is to find 5 pieces of the Seal of Solomon, so they can stop the demon that is responsible for the end of the world in 20 12. ... walking along the corridor on the second floor, glimpsing over the paintings on the walls, he saw a figure of a woman at the end of the corridor. He couldn’t see her clearly because of the dim light, ... leave the castle for nights, you won’t be bothered.” As soon as the gate disappeared in the top part of the wall, the car rushed inside. Behind the front wall, was a courtyard very well-kept. There...

Ngày tải lên: 06/11/2012, 16:13

... punctuation of 5 summaries 31- 32 superfluous words/phrases 23 -24 , 72 syllabication 38 syntax 28 -31 inversion 32- 33 parallelism 26 -28 tense in summaries 31- 32 than case of pronoun after 12 ... use of 20 modifier(s) adjectival 12 position of 30-31 most vs. almost 53 myself vs. I 12 names (of firms), comma in 2 names (of persons) in direct address 3 possessive case of ... punctuation of 5-7 statement supplementing 4 mannerisms 17, 42 margins 35 may vs. can 42 sparing use of 20 meaningful 53 memento 53 metaphor, use of 80 might , sparing use of 20 modal...

Ngày tải lên: 20/01/2014, 20:20

... can vs. may 42 sparing use of 20 care less , misuse of 42 case of pronouns 11-13 case (noun), misuse of 42 certainly 42 character , misuse of 42 claim (verb) 42- 43 clarity in ... language. They will hear the beat of new vocabularies, the exciting rhythms of special segments of their society, each speaking a language of its own. All of us come under the spell of these unsettling ... to another word in the sentence. She is the leader of our group. We opened the door by picking the lock. She went out the window. prepositional phrase A group of words consisting of a...

Ngày tải lên: 20/01/2014, 20:20

... www.tailieuduhoc.org 8. Avoid the use of qualifiers. Rather, very, little, pretty — these are the leeches that infest the pond of prose, sucking the blood of words. The constant use of the adjective little ... draws the reader's attention to the sense and substance of the writing, rather than to the mood and temper of the author. If the writing is solid and good, the mood and temper of the writer ... without flaw. The use of language begins with imitation. The infant imitates the sounds made by its parents; the child imitates first the spoken language, then the stuff of books. The imitative...

Ngày tải lên: 20/01/2014, 20:20

... submerged. The log was partly submerged. She was partially in and partially out. She was partly in and partly out. She was part in, part out. Participle for verbal noun. There was little prospect of ... one of us knows he is fallible. Everyone in the community, whether they are a member of the Association or not, is invited to attend. Everyone in the community, whether he is a member of the ... brother anticipated the upturn in the market. My brother expected the upturn in the market. In the second example, the word anticipated is ambiguous. It could mean simply that the brother...

Ngày tải lên: 20/01/2014, 20:20

... men. The samples were then frozen and stored in a stainless steel tank. In the lefthand version of the first example, the reader has no way of knowing whether the stain was in the center of the ... conclusions. 22 . Place the emphatic words of a sentence at the end. The proper place in the sentence for the word or group of words that the writer desires to make most prominent is usually the end. ... President in 1889. If the antecedent consists of a group of words, the relative comes at the end of the group, unless this would cause ambiguity. The Superintendent of the Chicago Division,...

Ngày tải lên: 20/01/2014, 20:20

... bring the flesh and the blood. The more clearly the writer perceives the shape, the better are the chances of success. 13. Make the paragraph the unit of composition. The paragraph is a convenient ... preferred form in a paragraph on the dramatists of the Restoration, the second in a paragraph on the tastes of modern readers. The need to make a particular 28 For more material and information, ... www.tailieuduhoc.org In these cases the writer must simply learn the idioms. The contents of a book is singular. The contents of a jar may be either singular or plural, depending on what's in the jar —...

Ngày tải lên: 20/01/2014, 20:20

... the right vs. the wrong, the timid vs. the bold, the ragged vs. the trim. From every line there peers out at me the puckish face of my professor, his short hair parted neatly in the middle and ... words. 23 18. Avoid a succession of loose sentences. 25 19. Express coordinate ideas in similar form. 26 20 . Keep related words together. 28 21 . In summaries, keep to one tense. 31 22 . Place the ... called The Elements of Style , whose author was the professor himself. The year was 1919. The book was known on the campus in those days as " ;the little book," with the stress on the...

Ngày tải lên: 20/01/2014, 20:20

... vector of each word from the centroid of its closest cluster, and to assign the differential vector to the most appropriate other cluster. This process can be repeated until the length of the ... subjectively judge the results, we only selected words where we felt reasonably confident about their possible parts of speech. Note that the list of words was compiled before the start of our experiments ... assignments. The results from this procedure are shown in ta- ble 2 where for each of the 50 words all computed classes are given in the order as they were obtained by the algorithm, i.e. the dominant...

Ngày tải lên: 08/03/2014, 04:22

... 3 -3-7 -5.6 +3.9 2. 8 Exponent of power, derived from tests: x - 1.6044 1.6 Coefficient of lhysteresis: - _ .00335 hence theoretical curve: .151 .0033.5 BI6 17 11. II. ob)s1. eal c. 3030 310I 3 620 3550 4 320 4355 4830 48go 5950 6i6o 6090 6530 7850 7840 8780 9040 II,o6o 123 0 15,840 I5,340 i6,i6o i1 ,28 0 20 ,350 19 ,26 0 20 , 620 21 ,440 23 ,180 24 , 120 av: r2l Al ặTHERFORCE 22 SYEINMETZ ON THE LAW OF HYSTERESIS. [Jan. 19, Here evident proof of the induction of eddy-currents in the iron was found. Especially perceptible was a decrease in the watts consumed by the iroil, when a larger M. M. F. of high fre- quency was left acting upon the iron. This decrease inust be attributed to the increase of the electric resistalnce of the iron, caused by its inereasing temperature. To eliminate this source of error as far as possible, before each set of tests an alternating current of high frequency (N - 20 (0) and considerable strength was sent through the magnetizing coils and left on for ten to fifteeni mninutes, and thel fnrst readings witlh low imagiietization, then witlh high, and theni again with low mnag- netization were takeni. But, nevertheless, as was to be expected, in these tests the observed values agreed less with each other thain in the former readings. The method of determinationi, the apparatus, etc., were the saine as in the second set of tests, oiily that animeter, voltineter, and wattmeter were used at the same time. In calculating these tests, the law of the 1.6th power was assumed as true, and the loss of energy in the iron expressed by the equation, 11 ... 18 92. ] STEINMETZ ON THE LA W OF HYSTERESIS. 15 TABLE II. (6.) B. BI. B. H. 1000 1 52 I3,000 923 0 20 00 4 62 14,000 1I0,400 3000 884 I5,000 Il,6I0 4000 1 24 00 I6,000 12, 880 5000 20 00 27 ,000 24 ,180 6ooo 26 80 i8,ooo 25 ,550 7000 3430 19,000 16,970 8000 424 0 20 ,000 18,400 9000 5130 25 ,000 26 ,29 0 I0,000 6070 30,000 35 ,21 0 22 ,000 7070 35,000 45,o60 22 ,000 8130 40,000 55,800 II ... 757 X 10- B. Hi H2 He I % caic. obs. 27 10 1,030 1 ,29 0 23 20 2, 340 - 20 - .8 4 720 2, 510 3.910 6,430 6,480 - 50 - .8 7540 5, 320 9,970 15 ,29 0 I5,960 - 670 - 4.4 12, 380 1I,700 26 ,800 38,500 38,500 13 ,20 0 13,000 30,400 43,400 42, 600 + 800 + i.8 av: 6.o + i.6 (- .8) Therefrom we get the results: N=V 78, 6 readings, rq .00331 e .751 X 10-s 140, 6 " .00331 .730 X 10-6 20 7, 5 "' .00336 .757 X 10-8 The values found for C are so nearly alike that we can consider them as constaint, and take their mean value - .00333 as the coefficient of hysteresis. Even the values found for s are not much different froin eaclh other, not more than was to be expected from the unavoidable differences in the temperature of the iron, which because of the high electric temperature coefficient of iron makes - rather vari- able. Taking the average of e, we derive = .746 X 10-6 and as formula of iron loss, .H .00333 B'-6 + .746 X 10-6 _N B2 In Fig. 4 are drawn the four curves, 1. True hysteretic loss, H...

Ngày tải lên: 04/06/2014, 12:42

... 18 92. ] STEINMETZ ON HYSTERESIS. TABLE XXVI. HYSTERESIS OF TOOL-STEEL Sh. (2) Ld Lr Ld Lr i 6.6o +16.60 I6.58 I6. 52 I6.58 I6.53 I6. 52 I6 40 I6. 52 I6. 42 I6.45 26 .27 I6.45 I6.30 I6.38 I6.Io I6.38 I6.13 I6 .28 I5.90 16 .28 15.95 I6.17 I5.60 I6.I7 I5.68 I5.95 I5 .20 I5.95 13.30 25 .66 14.70 I,.66 I4.90 I5 .20 I3.30 1j .20 13.60 24 .20 9. 6o I4 .25 10.80 I2.00 2. 20 22 .40 4.50 2 7 .20 8 20 -3 .20 1.50 -7.50 -8.oo Io8.00 66.oo i6 6 12. 30 . 029 I .01887 3.I6 2. 80 .OI955 TABLE XXVII. HYSTERESIS OF TOOL-STEEL S. (I) (2) Ld Lr Ld Lr 14-55 I4.55 24 .45 I4.3I '4.45 I4. 32 24 .25 I4.09 '4 32 I4. IO 24 ,25 '3.74 24 .25 23 .76 14.09 13 .28 14. 12) 23 .3I 23 .87 I2.74 13.87 12. 77 I3.57 I2.94 I3.57 II.99 I3.o8 20 .070 I3.o8 IO. 89 22 . 32 8.6o I2-35 9,55 II .20 5.o6 12. 30 7 .20 9.55- 8o 9.90 3.60 6.40 7.70 - .90 4.60 -3.80 -2. 70 -6 .20 -7 .20 66.74 4I2 .22 14-55 IO.875 .OI457 .01434 Ld (3) (4) (4) Ld Lr +14.55 24 .52I 4.49 24 .43 24 .38 24 .34 24 .25 14. 120 14.07 I3.97 13.85 23 .63 I3.55 +I3 .28 [2 = + 43] .48 .635 Lr +I4-55 I4.48 24 . 42 14.40 24 .28 14 .29 24 .I2 14. I2 13.88 23 .83 23 .58 13.46 23 .20 13.C2 I2.78 22 . 42 22. 30 [F, 4 .24 ] 2. 43 I* 325 .OI444 651 ]1 I F 24 0 22 0 2CJ0 I80 I6o 140 r26 IOC, 40 20 0 -20 -26 = i F II 12 90 So 70 6o 50 40 30 20 IO 0 -IO -20 -30 H= L= (3) OI434 ặTHERFORCE ... Av. . 026 7 0 027 (I) a I +26 0 - 20 26 0 13 .25 -13 .25 23 .25 IO6 .20 . 026 95 + 25 + .9 (2) Is +26 0 - 30 ' 42 -I3 .25 - 2. 24 7.745 44-78 . 026 83 2 I3 .5 (3) fi +26 0 - 30 I25 +I3 .25 +IO.60 1. 325 2. 75 . 027 78 -io8 -4 ... I2 [F2 -47] 24 .68 3.185 .06I24 (3) (4) Ld Lr I Ld Lr +6 .25 6 .23 6.I3 6.I8 6.oo 6.II 5.86 6. 02 5.7I 5.89 5.57 5-73 5- 42 5-56 5 -27 5.30 5. 12 +4-95 [F2 = + 28 .1 i.96 .06i88 [Fi = 28 ] -4-57 5.0I 4.68 5 .22 4.84 5-37 5.00 5.50 5-I9 5.6o 5.36 5-70 5. 52 5.8o 5.67 5.86 5.8o -5.90 .665 .06178 (5) -Ld Lr +6 .25 6 .23 6.13 6.i8 6.oo 6.1I 5.87 6. 02 5- 72 5.89 5.959 5.6I 5-45 +5 .25 [F2 = + 47.] 1 .29 .50 .06I97 TABLE XXIII. HYSTERESIS OF TOOL-STEEL Oh. . (I) (2) (3) F Ld Lr Ld Lr Ld Lr +26 0 23 .25 + I3 .25 + I3 .25 &apos ;24 0 I3 .22 I3 .29 13 .22 I3.19 I3 .22 13.2I 22 0 I3.19 13,10 13.19 13.10 13.19 13.I7 20 0 13.15 I3.00 13.15 13.0I 13.15 13. 12 i8o 13.10 12. 88 I3.10 12. 90 13.I0 13.06 I60 13.05 12. 77 I3.05 22 .80 13.05 I2.99 I40 I2.99 12. 66 I3.00 12. 70 I3.00 I2. 92 120 I2.85 22 .40 I2.87 12. 46 12. 88 12. 76 I00 i2.66 22 .03 12. 68 I2 .22 I2.69 22 .50 8o I2. 42 II.50 22 .45 ii. 62 I2.47 12. 15 6o II.95 I0.30 12. 00 20 .50 12. 02 iI.65 40 II.00 7.00 II .20 8.6o II .22 II.04 + 20 9.40 - I.70 9.80 4.60 + io.6o o + 6.70 7 .20 - .30 LF2 = + 30.1 - 20 I .80 - I.90 -30 + 2 24 H = i06 .20 44-78 2. 75 L = I3 .25 7-745 1. 325 ] =o695 . 026 83 . 027 78 (6) Ld L, [Fi =-47-] -4-93 5- 32 5.o8 5- 52 5 .23 5.63 5.38 5-73 5-53 5. 82 5.67 5.87 5. 82 -5.90 2. 22 *485 .06Io3 18 92. ] 649 ặTHERFORCE...

Ngày tải lên: 04/06/2014, 12:42

... 1894.] STEINYIETZ ON HYSTERESIS. 603 The power consumed by -the induced current in thi8 zone, d xis: d W=6Ed C=2w2N I2B' y X d X (C.G.S.) units or erg seconds, and, consequenXtly, the total power consumed in one cm .2 of the sheet of thickness, d: d +~~~~~~~~~~d wTf. 2d4v 22 2 I xd1/C _d _d N2 2 B' r (C. G. S.) units 6 henee) the power consumed per cm.3 of iron: 8 TF _ w2 N2 B2 r d2 (C. G. s.) units or erg seconds, and the energy consumed per cycle and per cm.3 of iron; A w - 2 rd2 NB2 ergs Thus, the coefficient of eddy-eurrents for laminated iron is: 72 d 2 6 = d =1.645 (j2 where r is expressed in. (C. G. s.) units. Hence, if r is expressed in practical units, or mho-centimetres, it is: _2d2 1 0-9 S, 2 d _ -_ -= 1.645 d 2 10 ... 5 72 STEINMETZ ON HYSTERESIS. [May 18, have not been mnade sinTce, and the explanation of this exponent 1.6 is still unknown. In the calculation of the core losses in dynamo electrical ma- chinery and in transformers, the law of hysteresis has found its applicationa, and so far as it is not obscured by the superposition of eddy currents has been fully confirmied by practical experi- ence. % As anl instance is slhown in Fig. 1, the observed core loss of a high voltage 500 E. w. altornate current generator for power transmissioni. The curve is plotted with the core loss as abscisse and the ter-minal volts as ordinates. The observed values are marked by crosses, while the curve of 1.6 power is shown by the drawni line. The core loss is a very large and in alternators like the present machine, eveni the largest part of the total loss of ener,gy in the machine. With regard to the numnerical values of the coefficient of hysteresis, the observations up to the time of my last paper cover the range, 97X j03= Materials From To Average. Wrought iron, ... 1894.] STEIN ETZ ON HYSTERESIS. 581 ceptance the reciprocal of reactance; otherwise the susceptance depends upon reactance and upon resistance. From the definition of the admnittance: Y =p +j a .as the reciprocal of the impedance: U= r-j8 we get Y1 or 1 P +j q = -a or, multiplying on the right side numerator and denominator by !(r +js): +j (r-j 8) (r +j 8)' hence, since (r j s) (P +j 8) = r2 + 82 = 2: r 8 . S r + S Y/+8S2 u2 + u78 or, P 2 r + - g and inversely: t_ P -2+ 2 v2 C _ C S= 2 + ve 2 By these equations, from resistanee and reactanee, the conduct- ane and susceptance can be calculated, and inversely. Multiplying the equations for p and r, we get: ?rp Pr t2 2, 1 lav hence, ,2 2 (r2 + 82) (p2 + ?) = 1 and 1 1 ; U = - ặTHERFORCE...

Ngày tải lên: 04/06/2014, 12:42

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