Chronique bibliographique

Chron~que &bhographlque

27

CHRONIQUE BIBLIOGRAPHIQUE

N O T E DE L'EDITEUR Pour facihter la consultatmn de la bibliogr,a/ahie, nous aeons ado/at$ un double classement : d'abord ur, dassement chronologique et ensuite, darts chacztne des ann&s, un classement al/ahab~tique. Chaque lois que la source de la biblfogra/ahie a gt$ index&, l'mdex num&tque se trouve en tJte de la rdf~. rence. Les r~f&ences anenymes telles que <sont class&s en t$te de ,'ann&. II n'a /aas ~t~ tenu corn/ate de /aarticules clans let noms pro/ares, ainsi d'ATRI est classg sous ATRI, yon H O E R N E R est class~ sous HOERNER. Quand la r~f&ence com/aorte /alusiem's noms d'autem~, elle est clasr& rousle nora du /aremier auteur. Le Comitg de R$daction a estm~$ devo.zr commenter cerlaines r~f&ences. Elles sent classdes ~galement stti. rant les indlcatio,s qui /a~dcMent. Certai,es r~f&ences /aaJwes tans commentaire da,s le /ar~sent fascicule seronl comment&s clans let /arochaiJas num&'os de la revue. Tir3s-a-/aart : Ceux de nos lecteurs qui seraient mt&ess6s ~i recevoir des fir6s-~.-part des pages bibliographiques de notre revue peuver~t o,btenir ceux-ci en en faisant la demande, k l'avance, adress6e k l'~diteur : Les Presses Acad6miques Europ6ennes, chauss4e de Charleroi 98, 1,060 Bruxelles - - Belgique. Reprints : Those, amongst our readers, who are interested in getting reprints of the bibliographical pages of our Review, are requested to ask for them, beforehand, to the Publisher: Presses Acad6miques Europ6ennes, chauss& de Charleroi 98, 1060 Bruxelles - - B d g i u m . Sonderdrttcke : Sonderdrucke der bibliographlschen Seiten unserer Zeitschrift stehen Interesseriten auf Verlangen zur Verfiigung. Bi~e wenden Sm sich jeweils nor Erscheinen an den Verlag: Presses Acad6miques Europ&ennes, chauss~e de Charleroi 98, 1060 Bruxdles - - Belgique.

1966 KOSAREV A . A . . A method of simulating some heat conduction problems with moving boundaries, ]oupnal o/ Engmeellng Physics, Vol. 10, 1966, n° 2, February, pp 146-149. 10353 1967 BRASFEILD C.W & BALL J . W . : Expansion of Santa Baibata harbor, Cahfmma Hydraulic model investigation. U.S. Army Waterways Station (U.S.A.), technical report n" 2-805, 1967, December, pp. 1-23. 10354 BRASFEILD C.W. & CHATHAM C E., Jr Expansion and revision of Kawaihal harbot, Hydraulic model invemgatton. U S Army Ware,ways Experiment Stat,on, technical report n ° 2-806, 1967, December, pp. 1-19. 10355 FRANCO .l.J & SHOWS L.J : Nav,gatmn conditions at Columbia lock and dam Ouachlta river, Loutsiana, Hydraulic model investlgatmn US Army Waterways Expmiment Statmn (U S.A ) technical repro, n" 2-756, 1967, Febtua, y, pp. 1-24 10356 FRANCO J J, SHOWS L.J. & FOSTER J E. : Arkansas Hem navigation entrance. Hy&aulic model investigatmn, report n" 2-795, 1967, September, pp. 1-24 10357 JACKSON R A. : Stability of proposed breakwater burns wate,way harbor, Indiana. Hydraulic model Investigation. U.S. Army Watmways Experiment Station (U.S A.), technical report n" 2-766, 1967, March, pp 1-23. 10358

KAMEL A . M . : Stability of rubble-mound tsunami barrier, Hilo Harbor, Hawaii. U.S. Army Waterways Experiment Statmn (U S A ) techmcaI *eport n o 2-792, 1967. August, pp. 1-48. 10359 MELSHEIMER E S Outlet structure for Eau Galle ,eservii,, Eau Galle river, Wisconsin, U.S. Army Waterways Experiment Station (U.S.A), technical report n ° 2-774, 1967, April, pp 1-20 10360 WILSON H.B. : Wave action and b,eakwater location, Nayo ha,bot, California Hydtaulic model investigation. U.S. Army Waterways Experiment Statmn, technical report n ° 2-799, 1967, November, pp 1-37. 10361 1968 BALAKIREV V.S. et a l . . Experience w,th the design and opelation of analog-digital computing complexes based on small, medium and large digital computers : Air Force Systems Command Wright-Patterson ABF N70-32322, 1968. 10362 BEKEY Gemge A & KARPLUS Waltei J . . Hybrid Computat,on, John Wiley & Sons, New York, 1968, 464 pages, $ 13 95. 10363 HERMANN F.A. Jr : Model studies of navigation improvements, Columbia River Estualy, Report 1 : HydrauJ.ic and salinity veiification. U.S. Army Waterways Experiment Station (U.S.A.), technical report no 2-735, 1968, December, pp. 1-24. 10364

Annale~ de /'AsJocmtmn h~/e~natiomde pou, le Ca/cM a~mlog~que

28

N" 1 - - ]anwer 1971

HOESCHLE Davtd E, Jl Analog-m-digital and digltal-toanalog conversion techmques. New York, Wdev, 1968 10365

IVlARECHAL G . & WERTS J.P : Etude d'un quadrateu: lapide et pidcis, Revue M.B.L.E (Belgique), Vol. XII. 1969, n ° 3, pp 77-95 1037~.

MEN'SHIKH A E ' Exteinal piolectmg o~ analog/digital cnnverters for reformation measute,nent systems, Coll. Means of analog and analog . dtgital computers. Ed. Mashmostroyeniye (USSR), Moscow. 1968, pp 260-269 10366

SCHAFER Wolfgang : Zut AusaLbeitung der Geratekonzeptmn ftir emen speziellen Analogrechner zu einem Obei. flachentastschnlttgeriit, ll'ftssenscha[lhche Zeltsch~l#, Technische Hochschule Karl-Marx-Stadt, Band 11, 1969, Heft 5 S. 587-590. 10379

SERGESKETTER M ] . . Use o~ electronic analog ~low computers to simplify gas measurement, Techn. Bull. Engmg. Exp. star. W Va. Umv. (G B.), 1968, n" 87, pp 427-428 10367

SCH~)NEFELD R. : Iterative Rechentechmken auf emem ptogrammgesteuerten Analogrechner, Stud. htophys. (Deutschland) Band 14, 1969, Marz, S. 207-212. 10380

YASTREMSKIY Yu. N. & ANOKHIN S.I. : lnve~ttgatmn ol extiemal systems on analog computeis, Coll. Automation of chem prod., (USSR), Moscow, 1968, n" 2, pp. 24-29. 10368 1969 621.3t6.99~ BERNET D. : Modellmessungen zui Elmittlung ties btns~eidungswidmstands yon Erdungsanlagen Ele&,et Band 23, 1969, Nt 12, S. 506-507. 10369 BEUTER

R.

:

DIgital-Analog-Umsetzung mtt Kettenleitem.

TOMSON T , I . • Ct)nvetttsseur analogique-num&tque quasJlindaire a balayage ~ tension exponentielle Avtometpl]a (S S S R ) 1969, 1]*' 6, pp. 94-102 10381 621.3 I,t 222.6 W R I G H T L.A. & MORSZTYN K. : An improved method of simulating the tlanstent performance of power system tiansfnrmers. Iulemat. ]oum. Elects. Engng. Edm., Vol. 6, 1969, n" 4, pp. 499-'~16 10382 ZNAMENSKAJA N.S Mmphological principle of modeling of tlvet-bed process . 13e Congr~s, A I.R.H. 1969, Kyoto (Japan) Proceedings, Vol. 6-1, 1969, pp 195-200. 10381

Elekt~onlk (Deutschland) Band 18, 1969, Nl 11, S. 325-330 10370 BOBB W.H & BOLAND R A,, Jr. Channel unpmvemeut, /:ire Island inlet, New Ymk, Hydrauhc mode[ investigation, U.S. Army, Wateiways Expmiment Station Vicksburg (U.S.A), Technical lepmt, H-69-16, i969, November, pp. 1-35. 10371 COHEN D J. : Analog solutions for full wave differential equatmns. Clearinghouse, U.S Department of Commerce, Springfield, Va., AD 682A89, 1969, January, 89 pages. ~10372 GRAVES W.L. & Mac DONALD R A . . Hybiid exetuhve User's approach Amer. Fedei. Inform. Processing Soc Conf. Proc. X X X V Full Joint Computer Conference, Las Vegas, Nevada, 1969 Montvale, New Jersey, AFIPS Press, 1969. 10373 HERBIG H. Ober elne Analogie zm zweikomponenten zweiphase,~ Gasstr~Smung. Fo,sehung zm IngeMeurswesen, (Deutschland), Band 35, 1969, Nr. 6, S. 174-179. 10374 HOLWAY L.H., J r . . Slmdatity model of an explosion in a rarefied atmosphere. The physics o/ Flmds (U.S.A.), Vol. 12, 1969, n" 12, December, pp. 2506-2510 10375 KORN G.A • Project DARE : differential analyzer replacement by on line digital simulation. Amei. Feder. Inform. Processing Soc. Conf. Proc XXXV. Fall Joint Computer Conference. Las Vegas, Nevada 1969. Montvale, New Jersey. AFIPS Press, 1969, pp. 247-254. 10376 LEJEUNE A . Le TAA 861, un amphficatem op$rationnel d6bttant 70 m A e t ses applications mdusmelles, Electronique mdurtrielle et Mtcro#leLtrontque (France), 1969, n" 120, pp 771-774. 10377

1970 ASHLEY ]. Robmt : Another approach to time scahng the analog computer. Stmula//ota, Vol. 15, 1970, n" 1, July, pp. 37-40. 10384 AUBRUN M , HUMBERT CI. & TRICHOT Ch. M~thode analogique pour la d~terminatmn de fonctionnements optimaux, Revue A, Volume XII, 1970, n" 3, juillet, pp. 85-90 10385 ~ Par la mdthode des polyn6mes nmmaux, on d~termme le correcteur PID d'une mstallat,on dont on optimalise la z~ponse par la m$thode quadratique. On dtudie analogiquement la senslbdit~ du syst~me aux variations des param~tres du cor*ecteut ~> BAJENESCO Titu I ' La d$termmat,on, ~ l'aide d'une calculatrice analog,que, du point de fonctionnement de l'~tage d'enttde d'un amphficateut op~rattonnel, Revue HF, Vol. VIII, t970, n" 1, pp. 19-22 (communication) 10~86 <> BELLAMY N W & WEST M.J A hlgh-accmaey foulquadrant time-division analogue ,nultlpliel, Elettronlc Englheeling (G.B.), Vol. 42, 1970, n" 509, July, pp. 30-35. 10387 <~This paper describes a time-dlvl~lon multiplying system of high accuracy, based on the simultaneous pulse-amplitude and pulse-duration modulation of a square-wave cartier to pioduce a constant frequency vaiiable mark-space multiplying system. The accuracy of the multiplication is 0.01 to 0.05% of full scale (typically 0 03%) and the umque design of two analogue switches used m the muir,plier is outhned ~>.

Chronique btbhograDh~que BHATTACHARYYA B B. ' Actwe RC all-pass networks w*th a grounded operatmnal amphher, P~o~eedtngs of the I.E.E.E Vo[ 58, 1970, n" 6, June, p 9a,3 (Proceedings letter). 10388 BIGHAM James P., Jr . The lunar landing training vehicle &mu/at/o& Vol. 15, 1970, n" 1, pp 17-18 111389 BLAKE C.C & LEIGHTON C C Lmkmg two ahen dtgttal computers vta a Brtttsh Standard interface, Computer Bulletin ( G . B ) , Vol. 14, 1970, n" l, pp 106-11/. 10390 B R O W N Malcolm O & John G WATERS . The lunar module s~mulator S/mulatmn, Vol. 15, I970, n" l, July, pp 27-29 1o391 << The Lunar Module SHnulatms (LMS) m Houston and at Cape Kennedy are highly complex devices used fm flight crew training and systems engmeer, ng evaluat,ons to support the Apollo m~sstons.

a Eacl~ of the two smmlato,s cnnststs of a three-machine digital computer complex, associated dtg~tal conversmn electromcs, a crew statton that is an accurate replica of the Lunal Module cockpit, an infinity-optics visual display system, and an msttuctor-operator control console )) BRUGGEMANN Hatro . Feedback stabthzed tour-qua&ant analog multtpher, I E.EE ]omnal o/ ~ohd-sh~te cntuzta, Vol SC-5, 1970, n" 4, August, pp 150-159. 10392 ~ A technique utd:zing an ideal controlled current fmk as a fundamental budd,ng block ts evolved to generate the product of two variables A particularly useful ,nplementat,on of the technique, making use of the exact exponenttal cha~actensttcs of the emitter-base lunctlon of the b~polat t,ansistor to reahze a controlled current fork, is demonstrated. It is shown that a mismatch of transistm pairs and a mismatch of resistance values gtve use to certain pre&ctable errms for whxch quantRat~ve expresstons arc derived m order to detmmine acceptable tolmances )). <~Measurement of a parttcular design ate green to suppmt the theoretical derivations, and the opetatton of the multtpliet as a squarer, independent of transistm-pai~ mtsmatch, ts demonstrated. ~) • Increment curve genmatton. I.E.E.E. on Computers, Vol. C-Ig, !.970, n" 9, Sep-

DANIELSON Pet E

Tmnsactton,

tember, pp. 783-793.

10393

<
29

¢{The paper deals with two recently reported active errtufts fin teahz'.ttmn of grounded inductor usmg a single umty-gam amphf,et and RC networks. It ts shown that the inductance parameters ate very sensmve to amphfte~ gaitl; this can be remedied by using a high-gain ddfe~ent,al-input opetatmnal amphfter. Amphtlet tmperfection in respect to non-zeio output ~mpedance is found to make both cucmt~. behalve s.nilarly. Sensmwty of tuned ctrcmts using the act,re inductances ~s analyzed and condmons for minimum sensitivity are derived Interest.ngly enough, the sensitivity of active tuned circuits ~s found to be less than that of an ordmary passive LCR tuned cHcutt Th~s ~s shown to be a teflectmn of the senstttv,ty prnpemes of the passive eqmvalent cHcutt of the active tuned circuits )) EVERT Carl F. MMwestern S,mulatmn Councxl meeting Simulatto,, Vnhune 14, 1970, number 6, June, pp 249-251. 10=,96 EVERT C F MMwestern smluI,mon cnuncd meeting, 3/.tuiation, Vol, 15, t970, n" I, July, pp 2-4 10397 FATTON R. Nlchthneate Smmhetung des hydroelektttschen Systems Turbine-Genelator/nit ohmscher Last auf dem Digitalrechnet, Ne#e Terhntk, 12 Jahrgang. t970, Nr. A.'I, S 139-145 111398 ~ E m nichthncarcs Modell zm Simulation ether hydroelektt,schen Gruppe wLrd entwackelt. Allgemem anwendbate Grundlagen zm Sunulat,on kontmmetl,che, Systeme wetden he~geleitet und angewendet )~. FLEMING C . Sunulation of st~eamflow in Scotland. Bulle-

tin de l'Assooa/iop~ mteJn,Mo#ale d'Hydlologle seientlfique (Belgique), Vul 15, 1970, n" 1, mars, pp. 53-59.

10400

GIESZL Lores R. : Continuous flow charts. Slmuhetlon, Vol. 14, 1970, n" 6, June, pp. 281-289. /.0401 <~The current concept of the flow chart fm documenting a computer program seems to be more heavily influenced by its business data processing background than by its mathemattcally oriented mceptton The result of this is a loss of deftMtion which mhibtts turther developments m prog,am documentation

~)This paper proceeds trom an analys~s of the structure of a program and how thi~ structme ts represented by a flow cha*t to derive an extension of this ' continuous flow charts. ~> )~ A continuous flow chart, which may be constructed from a conventional flow chart by removing its points of (flow) &scontmuW, is shown to be a form of documentation ideally suited for large-scale programs that by their nature revolve complex logic (such as a war-game simulation). ~ The mottvatton for continuous flow chamng ts the poss~b~l,ty ot dynamic documentatmn arising from a set of such flow charts. That ts, the requuements suggested m thLs paper tot a flow chart to be called continuous provide an mducnve defm,non for the members of a set of levels of documentanon of a simulation such that the ease of a user's level to level transmon of understanding (the logic depicted is maintained). Such a set would have, at its highest level, a flow chart plctming the ovetall logic of the entire s~mulation, •'rod, at ~uccessively lower levels it would contain flow charts describing smaller portmns of the prog,am m greater detad

30

Annales de /'Association internalionale pout" le Calcul analogique

An actual machine-language program would constitute the lowest level of documentation in this set. Since the creation of such a set of continuous flow charts can be started from either the highest level or the lowest level, then this procedure should serve equally well for either developing a complex program from its most basic logical con¢eption, or for documenting such a program as has already been written. ~> GRAY J.O : The application of photoconductors as voltage variable operational elements m iterative analogue computation, Inteinattonal ]omn°d of Control ( G B ) , Vol. 11, 1970, n ° 4, pp. 593-598 10402 HAMMERSLEY Vernon C. : The water ~mmerslon facility SfmMation, Vol. 15, 1970, n" 1, July, pp. 13-14. 10403 <> The Water Immersion Facility (WIF), at the Manned 5pacecraft Center consists chiefly of a water tank, a control room, and a small medical ,nstallation. For spacecraft exercices, mockup trainers with special provisions for viewing, submersion, and safety are used m the water tank. ~> HANKO Z. & AKANTISZ Z. : Etude sur module de l'am& nagement Kiskbre. Htdpologml Kozlony (Hongrie), 1970, n" 1, pp. 10-23 fen hongrots). 10404 HOEVEN G. : De aitaloge rekenmachlne, een hnlpwerktuig btI de bestudering van de bloedsomloop. Polyteclanlr~h Ti]dschrz]l, Editle Elektrotechnik - Elektronica, 1970, n ° 9. 10405 HONNELL P.M., BORGWALD K.J & MULHOLLAND R.J : Linear functional entries for the matric computor Annales

de l'Asrociation mteln,tt:onale po::r le C,dcul analogiq#e (Belglque), 1970, n" 4, pp. 172-181.

10406

N" 1 - - ]anvier 1971

<> JOHNSON Everett: Joint Southwestern. Central States Simulation Council Meeting, Slmtdation, Vol 14, 1970, number 6, June, pp. 252-253. 10408 JOHNSON Harold I. & TRADER Arthur G : Partial gra, vity simulators. Stmtdation, Vol. 15, 1970, n" 1, pp. 15-16. 10409 <. KORN Isradl ' On the representation of arbitrary functions and thelr generation, I.E.E.E. Ti,msactions on Computers, Vol C-19, 1970, n ° 6, June, pp. 483-486. 10410 <>. KOZLOV E S ' Set of units for constiuctmg analog computers, A,l Force Systems Command Wrlght-Patterson AFB N70-32492, 1970, 22 pages 10411 KRASNO L.

A user specifies software for hybrid computing.

Stmldatlon, Vol. 14, 1970, ,a" 6, June, pp. 257-260.

<> phenomena, the other being van der Pol's The network theory, and the electronic realization, of the linear functional entries is then developed, nod is based upon an observation of Dekker regarding <.

In the process of discussing the study, a philosophy for writing specifications for hybrid software is presented. The philosophy, herein called <>, can be used by any facility regardless of its requirements With Functitmal Specifications, a facility states only its requirements and leaves the designing of the system to the vendor. >>

JEHLY Lynn C. & ALTON Everett D. : Simulation of a fhght instrument that indicates and reports true altitude of an aircralt, Annalva de l'Arsocktlton mtelnaltonale pour le Calcul ,m,dogsqtw (Belgique), Vol XII, 1970, n" 4, ottobre, pp. 192-203. 10407

KREMEN Jaromlr & DEMEL Pert. : Contribution to the problem of initial conditions of linear dynamic systems at :l discontinuous driving function. Annales de l'Association tnte~nationale po::J le Calctd analogique (Belgique), Vol. XII, 1970, n" ,l, octobie, pp. 182-191 10.413

10412 a The article discusses a subject about which much is said and little is written - the wilting of specifications for hybrid software The basis for the article is an Aerospace Corporation Hybrid Computing Center study of the upgrading of the digital portion of our hybrid system.

Chronique bib/)ograpb:que <
~: ~,. s 'i' (t) = ~ a l , . " ' O) I=0

1--o

w:th &scontinuous driving function x (t) and with generalIy non-zero inmal conditions y¢O (0), i = O, 1, . , n - i. >> At first the concept of <> is intro. duced. Furthermore a relatmn between the generalized solution of the differential equatmn and its solution on analogue computer is shown. As a result we can conclude that the existence of the analogue solution closely depends on the existence of the generahzed solution The rigorous answer concerning the existence conditions of the generalized solution is given by Caratheodory's theorem. It is proved m the article that the construction of Laplace transform of the above-mentioned equation requests the knowledge of the left-hand initial conditions only as oppose to the demands in the existing literature. The proof is based on the contmmty of the generahsed solution. In the present article ate also derived two methods of easy and rapid analogue simulation of the above-mentioned differential equatmn with non-zero left-hand initial conditions. Theoretical conclusions are illustrated on a simple example, a LEITAO B . . Essais sur mod&les rdduits de la coupure du Zamb~ze a Cabota-Bassa, Tecnica (Portugal), 1970, o ° 395, fdvrier, pp. 253-264 (En portugais). 10414 LEJEUNE A. : Un multiplieur analogique '3. quatte quadrants, Elechon&ue ]ndusirielle el Mic~.odlettro~dque (France), 1970, n" t30, pp. 27-32. 10415 McLEOD John : Introduction to special Apollo issue. &mula. t*on, Vol. 15, 1970, number I, July, pp. 5-1I. 10416 LINQUIST Claude S. : Semiconductm photodetection aet,ve transmissmn hne analog. P~oceedingJ of the I E E.E., Vol. 58, 1970, n" 9, September, pp 1362-1363 (Proceedings letters) 10417 <>.

31

<>. PRUDE Gemge : The command module s,mulatms. Simulation, Vol. 15, 1970, n" 1, July, pp. 23-25. 10423 ¢>The simulators ale designed with extreme flexibility for mo&ficatmn. The compute, complex is readily adlustable to changing mission objectives which require a change in a Command Module subsystem. Any altmatlon of a particula, system or of a mathematical model is programmed and fed mto the computer. No variation in computer hardware is required. The required updating is thus accomplished with a minimum loss of training t~me. >>

N O U G A R E T M. : Un syst&me de convmsion analoglque-nu. mdrique pour les processus mdustdels, Autumn/tame (France), Tome XV, 1970, n" 1, pp 17-19. 10421

RILLINGS James H. : Analog sensitivity design of Saturn V launch vehicle, 1.E.E E Tlansacl:ons on Automatic Control, Vol. AC-15, 1970, n ° 4, August, pp. 437-442 10424 <>.

PARKER John R. & MARSHALL H Whithed : Developing an intmnationai mutual response system through political simulation techniques. S:m:dation, Vol. 14, 1970, n ° 6, 1970, n" 6, June, pp. 26t-269. 10422

SCHOONAERT D.H & KRETZSCHMAR J. : Reahzatlon of operational amplifier all.pass network, P~oceediJ~gs o] the I.E.E.E. Vol. 58, 1970, n o 6, June, pp 95~,-955 (Proceedings letter). 10425

MALLET J.F.W. & PHIZACKERLEY R.P. • A logar,flamic analogue-to-digital converter used for optical density measurements, ]omn. Phys. E. ( G . B ) , 1970, n" 3, March, pp. 199-202. 10418 MATISSE Gdtard & LACOSTE Jacques : &mulatmn en physin-pathologic resp,ratoire, Automat,sine (France), tome XV, 1970, numdro sp6cial, pp. 379-384 10419 M A Z D A F.F. : High-frequency thyr~stor chopper, Elect,.. En~ g~zwer,ng (G.B.), Vol 42, 1970, n o 504, pp. 34-39. 10420

32

Annales de I Assocmtzo,. mternatmnale pour le Coital analoglque

N " 1 - - ]anvier 1971

~)

a A method is described for simphfymg the opt,mum design ,)f acute networks that use operational ampl,fters. The optimum design is based on mtmmizatton of the sensitivity of the steady-state frequency response to changes in amplifier gain )>.

SCHUCHMANN Heinz : On the slmulatmn of dlstitbuted parameter systems Simnlatwn, V¢~I. 14, 1970, n" 6, June. pp. 271-279. 10426

VAGAS I . . Analog,es ,h$ologiques et 6lectrlques, modules autor6gulateurs et ptobabd~stes pout caract&~ser certalns processus transitmres en hydraulique, HydJologim Kozl6ny (Hongrie) 1970. n" 4, pp. 161-173 (en hongrois) 104%4

This paper presents analog, hybrid, and dtgtta[ stmulatton techniques for one-&mensional flow, dfffuston, and wavetype systems, These techniques also provide the basis for the simulatton of more complex distrtbuted-parameter systems. Many of the techniques considered are well known, however some of them are just recently developed. The varmus techtuques result from either dtscret~zat,on and transformation of the original partial differential equations or from applicatton of the method of characterist,cs. From this pmnt of vtew. it is poss:ble to fit the techmques into a general framework. It will be indicated by means of the properttes of each techmque which type of computer will best ,mplement it and whwh system can be treated by it most advantageously SHARP J.A. & FARMER A R : Control of a paper machine using an analog computer Instrument p*acllce (G.B.), Vol. 24, 1970, n '~ 1, pp. 31-34. 10427 SILVESTER R. : Modeling of sediment motion offshore. j'ourna[ tff Hydrauh~. Research, Vol g, 1970, n" 2. 10428 STEBER George R. & KRUEGER Robert J. : A reahzing system functmns wlth independently controlled poles and zeros using standard operatmnal amplifiers. P, oceedings oJ the LE.EE., Vol. 58, 1970, n" 9, Septembel, pp. 1384-1386 (Proceedings letters). 10429 ~ A recent letter by Steber and Krueger reports that any system function of order n may be simulated using (n -[- 4) operational amplifiers. The present letter shows that all such systems can m fact be teahzed using only (n q- 5) operational amplifiers. More significantly, this letter contta&cts the validtty of another result by Seely by po,ntmg out that even if all the poles of T (s) are stmple and distinct ~t may not always be possible to realize it using only (n q- I) operational amplifiers ,~. STEIN T. : Integrator fth PlD.Regelung yon Wasserturbinen, Sehwetze~acbe Bauzettuug (Sutsse), 1970, Nr. 16, April, S ~159-362. 10430 STEINBRICH G. : Hybrtde Rechensysteme Elekl~on. Datenve, arbeit. (Deutschland), Band t2, 1970, Nr. 1, S. 1-11. 10431 STOIBER Tom : Western s~mulatmn council meeting. Slllllllotto,a, Volume 15, 1970, n" 1, July, pp 1-2 104~2 TOMLINSON G . H . . Optimum design of networks that use operational amplifiers, I.E.E.E T~an~a~tton~ o, Ct~cuit Themy. VoI. CT-17, 1970, n" :L August, pp 440-442 (correspondance). 10433

VANETTEN W C. & VANDEN BOORN J.H. : Drift reduction in wide band d.c. amplifiers by <, Eleatomcs letters, ( G B . ) , Vol. 6, 1970, n o 2, pp 45-56 104";5 VICHEV B.I & MITEVA V I. : Analogue compoter with Hall effect magnetoreszstance effect, EleLtronlcs lettel ( G . B ) , Vol. 6, 1970, n" 9, pp. 267-289. 1{)436 WILLIAMS Wayne K. ator. S~mulalton, Vol

The translation and docking szmul15, 1970, n" 1, July, pp. 19-21. 10437 < WINGHART J. : Un nouvel outd de l'amdnagement spatial exp4r,ment6 sur le site grenoblois. Le mo&}le analogique de pollutmn atmosph6nque. Le A~onltem" der T~avaux publu ~ et fftl Bdlz*tzeHl (France), 1970, n" 2~, 6 juin, pp 20--30. J0438