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1998 Vol. 15, No. 4
Published: 1998-04-15
 
5 REVIEW AND PROSPECT ON CONSTRUCTION OF PASSENGER STATION IN OUR COUNTRY
WANG Cexun
This pa per review s the g rowing o f the railw ay passeng er f low and the existing problems of the passeng er t ra nspo rt facilities. Af ter the establi shment of the Peo ple 's Republic of China, acco rding to th e actual situa tion of the rai lway and our count ry , steps hav e been taken to upg rade and renew the existing passeng er eg uipments a nd to further build up new passenger stations in some main point s. Af ter a long practical o peratio n, the abov e mentioned principles a re v ery beneficial and useful in the const ruction o f the passenger stations. In recent 10 y ea rs, the const ruction of other t ranspo rt faci li ties dev elo ps rapidly , especially the construction o f highw ay i s mo re rapidly than railw ay. Pro spect o f the future, the railway must speed up the step of dev eloment , and renov ation the co nst ructio n of the railw ay must meet the so cial dev elo pment and the needs of the people.
1998 Vol. 15 (4): 5-12 [Abstract] ( 2444 ) HTML (1 KB)  PDF  (209 KB)  ( 166 )
13 DISSECT ON SCHEMES OF RAILWAYS TOWARD XIZANG
JIAGN Hong
Based o n the analyses o n di fferent schemes fo r const ructing railw ays tow ard Xi zang sug gested and w rit ten by ex pert s publi shed in sev eral rai lw ay periodicals i ssued in recent y ears. a comprehensiv e analy sis has been put fo rwa rd in this paper. It i s sugg ested that the const ruction o f railw ays tow ard Xi zang should be accomplished wi thin tw o const ruction stag es. The main target of the fi rst stag e w ill be the const ruction of an impo rtant th ro ug h t ruck line by combining the Chua n-Zang Rai lway wi th the Hu-Yu Railw ay so as to enlarg ethe scope of the Chinese rai lway netw o rk towa rd the w est mo re widely ( i. e. the Shanghai- Lasa Railway ) . The Chuan-Zang Raiway may adopt the comprehensive Chuanzang-Ganza ng-Dianza ng shceme so as to economize the inv estment , to speed up the const ruction a nd to o rgani ze the w orkers more co nvenient ly. The main target of the second stag e w ill be aimed atto fill up the gaps in rai lway netw ork of the West China, espcially fo r co nnecting Xi zang w ith Qinghai and Xinjiang.
1998 Vol. 15 (4): 13-20 [Abstract] ( 2534 ) HTML (1 KB)  PDF  (219 KB)  ( 135 )
21 PLANE SURVEY AND VERTICAL CONTROL OF HIGH-SPEED RAILWAY
LU Yongchen
The t rain o perating speed in high-speed rai lway is usually ov er 200 km /h. Whi le raising speed o n ex isting rai lway s in China , the Jing-Hu High-Speed Railw ay wi ll be const ructed wi th running speed o f 250km /h and having a total leng th of 1307m. The technica l requirements for high-speed railway s a re much higher tha n that fo r o rdina ry rai lw ays. In the surv eying w o rks for the high-speed railw ays, the plane survey and the v ertical cont rol are of the fi rst impo rta nce for successful co nstructio n of a high-speed rai lwa y. The paper infers and demonst rates an accuracy issue for plane surv ey and v ertical co nt rol o f hig h-speed railw ay , fo r the purpo se of o ffering a theoretical basis for surv ey, desig n, const ruction and maintenance of o ur na tional high-speed railw ay.
1998 Vol. 15 (4): 21-28 [Abstract] ( 2542 ) HTML (1 KB)  PDF  (212 KB)  ( 123 )
29 ON THE SELECTION OF HAUL TYPE FOR BEIJING-SHANGHAI HIGH-SPEED RAILWYA
ZHAN Zhenyan
There are two haul types o f high speed rai lw ay in the w orld, i. e. the electrified t ractio n based o n w heel-rai l rela tion a nd the Mag lev Sy stem based o n mag netic levi tation technolgy. The May lev System has tw o mode, i. e. the superco nductio ng suspensio n system based o n elect rody namic repulsion used in Japa n and the electromagnetic suspension system based on elect ro dy namic at tractio n used in Germa ny. Thi s paper i llust rates the adva ntag e and applicatio n area of the Maglev System and describes emphatically the Mag lev Test Track buil t at Emsla nd in Germany and the planned Berlin-Hambury Maglev Railw ay which w ill be accomplished in 2005. The autho r ex plains also tha t a t present i t is not suitable to adopt this haul type on Bei jing-Sha nghai high speed rai lw ay.
1998 Vol. 15 (4): 29-32 [Abstract] ( 2504 ) HTML (1 KB)  PDF  (121 KB)  ( 114 )
33 BRIDGE ON THE HIGH-SPEED RAILWAY
WU Chengsan
The paper introduces the bridges bui lt on the high-speed railw ays in Germa ny. The main specialities o f these bridges are high rigidi ty , easy to be inspected and repai red, as w ell a s the applica tion o f UIC 71 standard loading. According to ty pes of the bridg e, the paper ex po unds the co ntents of the desig n for bridg es wi th prest ressed co ncrete gi rders, steel gi rders and composi te beams. The common essential among these bridg es is to limit their def lections wi thin certain v alue. Besides, the di fferent cross-sectio n of these bridg es a re proposed. They are valuable as reference fo r the design o f the bridg es o n high-speed railw ay in China. The autho r co nsiders tha t the U IC sta nda rd loading i s mo re reaso nable, a nd sug gests o nce more tha t w e should apply the UIC 71 standard loading instead of the exi sting China railw ay standard liv e loading.
1998 Vol. 15 (4): 33-38 [Abstract] ( 2486 ) HTML (1 KB)  PDF  (189 KB)  ( 170 )
39 INTEGRAL CONTINUITY OF RAILWAY IN WEST EUROPE
ZHAO Yucheng
The paper int roduces an academic conference co nvened by the Britain Branch of IABSE. The subject of the conference w as named as“ Running towa rd Jointless Bridge. ” From that time, based o n the integ ral continui ty of bridg e, the following pro blems were di scussed: the inpor tant meaning o f jointless rail on bridge, technical requi rements of joint less rai l in West Europe, compariso n o f st ress between joint less rail a nd jointed rail calculatio n o f leng th o f rail expansio n, ect. Ano ther thesi s named as“ Joint less Rai l o n Bridg e in Rai lway of Wast Europe” w ri t ten by the autho r wi ll be i ssued in our peridical hereaf ter, in w hich the fol lowing a rticles will be int roduced: essentails fo r calculating the longinudinal force o n jointeless rai l o n bridge, design principle fo r joint less rai l o n bridge by UIC, maximum span o f bridg e having joint less rail on bridge wi thout expasion joints, measures for reducing addi tio nal force, new co ncept o n ex pa nsio n joints etc.
1998 Vol. 15 (4): 39-46 [Abstract] ( 2490 ) HTML (1 KB)  PDF  (233 KB)  ( 87 )
47 APPLICATION OF STRUCTURAL SIMULATION FOR ENTIRE BRIDGE IN ANALYSES OF ERECTION OF BOX ARCH RINGS
ZHENGKaifeng
Analyses o f erectio n of box arch ring s for a lo ng-spa n bridg e based on concept of st ructural simula tion for enti re bridg e are presented. To co nst ruct mo dels of combined finite elements, to determine the erection cases in va ried construction stpes a re described in thi s paper. By means of numerica l ex amples, it i s show n tha t the concept of structural simulation fo r enti re. bridg e could analy ze a nd assess th e safety of co nst ructio n pro ject o f lo ng-spa n o r complex bridge.
1998 Vol. 15 (4): 47-53 [Abstract] ( 2541 ) HTML (1 KB)  PDF  (196 KB)  ( 154 )
54 DYNAMIC RESPONSE OF RAILWAY VEHICLE-CURVED BRIDGE
LI Wenhui　XU Kebin
In this paper, the v ehicle-curv ed bridg e systen i s studied. The spaced analy tica l model of a t rain passing on a curved bridg e wi th a span o f 32m, as ex ample, i s simulated by computer. The dynamic response o f the bridge derai lment quo tient , the reduction rate of the w heel load a nd the t rain stabi li ty a re calcula ted. The results are compared wi th the st raig ht bridg e. All o f the resul ts show tha t the proposed method i s ef fective in use.
1998 Vol. 15 (4): 54-60 [Abstract] ( 2440 ) HTML (1 KB)  PDF  (193 KB)  ( 125 )
61 TECHNICAL PREPARATORY WORKS BEFORE CONSTRUCTION OF BRIDGE IN A NEWLY-BUILT RAILWAY
JIA Zhiwu
Based on the technical ma nagement and co nst ructio n ex periences in recent years, the autho r ex po unds sy stematically the technica l prepa ra to ry w orks befo re the const ruction o f a new ly-buil t rai lw ay, empha tical ly on the technical prepa ra to ry wo rks before the const ructio n of a new bridge, iucluding the technical inv estigation, examination a nd v erification o f desig n drawings, engineering test, construction orga nization desig n and co nst ructio n desig n in situ, etc. Especially , the autho r ex plains in detail the method fo r making the const ruction o rgani zatio n design. They a re v aluable as reference and hav e guiding meaning co ncerned w ith the technical preparatory w orks for co nst ructing bridges before the const ruction of a new lybuil t rai lwa y line.
1998 Vol. 15 (4): 61-64 [Abstract] ( 2437 ) HTML (1 KB)  PDF  (113 KB)  ( 213 )
65 CONTROL MEASURES FOR CONSTRUCTIONG BRIDGE FOUNDATION IN DEEP WATER DURING CONSTRUCTION OF GANJIANG RIVER EXTRA-LONG BRIDGE
WU Qunhui
The Ganjiang ex tra-lo ng bridg e a t Taihe of Jiang xi Province w as o ne of the impo rtant engineering project s on the Jing-Jiu Rai lway. The leng th o f this bridg e i s 1900. 02 m w ith 52 pier abutment s. The founda tio ns o f the bridge w ere desig ned as 86 reinfo rced concrete g routing pi les. The hy drog eologic co ndi tions along the whole bridge were v ery complex , a nd therefore , the co nst ructio n of i ts foundatio ns under the deep w ater became o ne of the most di fficult point s in the construction of this bridg e. The paper descirbes the method fo r co nst ructing these bridge foundatio ns in the deep wa ter in detail , and ex pounds emphatically the co ntro lling mehods for the key w o rking procedures a nd the measures applied fo r cont rolling the const ruction qualities. They are v aluable as reference fo r the desig n a nd the construction of thi s kind of bridg e fo unda tions in the deep w ater.
1998 Vol. 15 (4): 65-70 [Abstract] ( 2512 ) HTML (1 KB)  PDF  (175 KB)  ( 178 )
71 ACHIEVING GREATER, FASTER, BETTER AND MORE ECONOMICAL RESULTS FOR CONSTRUCTION OF HIGHWAY TUNNELS BYMEANSOF THE ADVANCEMENTOF TECHNOLOGIES
ZHENG Daofang
How to solv e the di fferent pro blems occurred in the desig n a nd construction procedures during the const ruction of tunnels in the Chongqing Sectio n o f the Cheng-Yu Ex pressw ay by mea ns of the adv ancement of technologies a re int ro duced brief ly in thi s pa per. They a re the selectio n o f the route a nd the posi tio n of the tuunel, applying the adv anced co nst ruction metho ds, doing w ell the w ater pro tectio n design in tunnel by using adv anced techno logic achiev ements, allocating , pro perly the mechanica l a nd elect rical equipments, etc. The impo rtance o f making reaso nable deci sion through advanced techno logies has been also i llust rated in thi s paper.
1998 Vol. 15 (4): 71-76 [Abstract] ( 2483 ) HTML (1 KB)  PDF  (168 KB)  ( 97 )
77 PROBLEMS CONCERNED WITH THE REFORM OF EXISTING RAILWAYS
SUN Shaol in
Based on the par ticular si tuatio ns o n the reform o f the existing Bao-Cheng, Cheng- Kun and Chua n-Qian Rai lway s, the a uthor proposes sev eral opinions concerned wi th the running speed, po si tio n of No. Ⅱ rai lw ay line, desig n g radient , const ruction method, etc. The problems w hich sho uld be taken inte a ttention are also pro posed.
1998 Vol. 15 (4): 77-82 [Abstract] ( 2455 ) HTML (1 KB)  PDF  (167 KB)  ( 103 )
83 SUBSIDENCE CONTROL FOR REINFORCING PEAT SOIL ROADBED IN THE QIDIAN WORKSITE OF NANNING-KUNMING RAILWAY
JIANG Zhongxin　HUANG Jun　CHEN Guofang
Acco rding to the theo retica l calculatio n, numerical simula tio n and cent rifug al model test, the pea t soil ro adbed w as reinfo rced w ith crushed stone pi le and sho tcrete pile. Subsidence o f the sof t soi l roadbed w as ef fectiv ely cont ro lled, and a successful ex perience on reinforcing thick peat soil roadbed has been accumula ted fo r the fi rst time.
1998 Vol. 15 (4): 83-93 [Abstract] ( 2547 ) HTML (1 KB)  PDF  (292 KB)  ( 206 )
94 ESTABLISHING A RAILWAY 3S SPACIAL PREVENTIVE TREATMENT SYSTEM FOR GEOLOGIC DISASTER INFORMATIONS AND ITS PRACTICAL MEANINGS
ZHUO Baoxi
From the 1990s, there w as a rapid dev elopment of 3S tech niques, i. e. Remote Sensing ( RS) , Geog ra phical Info rmation System( GIS) and Global Po sitio ning Sy stem( GPS) , w hich dev elop a new pro pect for prev entiv e t rea tment of rai lway geolo gic di sasters in China. The paper giv es a novel thinking and proposes to establish a railw ay 3S spacial prev entiv e t reatment system o f geologic disaster info rmatio ns, taking the 3S techniques as the essentia l measures and emphasizing the spacial prev entive t rreatment and it s practicableness. Fo r forecast the time of occurrence o f the geologic disaster, a perfect new concept which is di fferent f rom the t raditional thinking has been pro posed. Here, no defini te time w ill be given fo r forecasting the time of occurrence of the geologic disaster, while the time co ncept i s relative and ra ndom.
1998 Vol. 15 (4): 94-100 [Abstract] ( 2464 ) HTML (1 KB)  PDF  (198 KB)  ( 73 )
101 A STUDY ON THE WATER PREVENTION FOR WEATHERED CRUST-SUBGRADE SLOPES
XU Zemin
The paper pro poses tha t the sand clay layer cov ering on w ea thered crust-subg rade slopes may be t ransfo rmed to a wa terproof barrier by way o f chemical manipulation to prevent w ater permeating into slope bodies, and studies the problem taking some slope on Cheng yu railw ay. The result s indicates that it may reduce effectiv ely the permeability of the sand clay to g ro ut it wi th Na2 CO3 so lution o r mix i t w ith Na2CO3 pow der and the disposa l w ay i s simple and inex pensiv e. The w ater preventio n mechanism is fo r Na2 CO3 solutio n to t ransform Ca-mo ntmo rlloni tes into Na-mo ntmo rllo ni tes. Mixing the sand clay w ith lime and Na2 CO3 powder may not only reduce it s permeabi li ty but also increase it s st reng th remarkably and in v iew o f the complex ity of the disposal process, the scheme is fi t fo r the t reatments o f rosdbed sof t soils.
1998 Vol. 15 (4): 101-107 [Abstract] ( 2461 ) HTML (1 KB)  PDF  (210 KB)  ( 93 )
108 APPLICATION OF COMPUTER ON CADRE MANAGEMENT WORKS IN RAILWAY CONSTRUCTION ENTERPRISES
RAO Li
The computer applica tion in enterpri se ma nagement is a necessary passage f rom the experiential manag ement to the modernized manag ement fo r the enterprises. It ca n g uarantee the dif ferent data updated, accura te and reliable, so as to o btain small wo rking time, high ef ficiency , low cost , economic expenses and to enhance the competi tiv eness of the enterpri se. Combined wi th the speciali ties of the cadre ma nagement w o rks in the rai lway co nst ruction enterprises, the paper expounds how to dev elop the role of the computer as a too l fo r servicing the cadre manag ement wo rks. The a uthor proposes hi s o pinio ns emphatically f rom the following three aspects: t reatment for g eneral affai rs, ma nagement cont rol and manag ement systems.
1998 Vol. 15 (4): 108-113 [Abstract] ( 2426 ) HTML (1 KB)  PDF  (161 KB)  ( 85 )
114 RESEARCH ON CURVE-SURFACE MODEL IN CAD SYSTEM FOR RECONSTRUCTION OF EXISTING RAILWAY LINE
YI Sirong
In this paper, based on the analy si s o f the cha racteristics in redesig ning an existing railw ay line, research on the curv e-surface model fo r rai lwa y line is put forw ard. According to the fea tures o f terrain data di st ribution in reco nst ructio n desig n, this paper set up a combined fi sh-bone triang le net fo r the descriptio n o f the fo rmatio n and terrain o f both sides. In this paper, characteri stics and dist ributio n of surface da ta and computa tion defined on these curv e-surfaces are di scussed in detail.
1998 Vol. 15 (4): 114-121 [Abstract] ( 2439 ) HTML (1 KB)  PDF  (225 KB)  ( 79 )
122 EXPLORATION ON DESIGN TEMPERATURE OF OPERATION ROOM FOR COMPUTER TERMINALS
LI Qingcheng
The ta rg et of determining the desig n tempera ture o f o peration room fo r computer terminals i s to render the computer o perators w o rking in the ro om wi th comfortable, full of vi tality and hig h ef ficiency , w hile no fa tigue o r mistake may appea r during long time w orking . Based on the calculations o f the thermal equi librium fo r huma n body a nd the heat t ransfer of surrounding st ructure of the building s, and taking Chengdu regio n as ex ample, the required room temperatures for computer terminal s a re calculated in detai l. Combined wi th the di fferent schemes o f ai r-co ndi tioning , the compari so ns and analyses are put fo rw ard. Finally , the commended values of requi red ro om tempera tures are pro posed, w hich a re valuable as reference fo r design.
1998 Vol. 15 (4): 122-126 [Abstract] ( 2444 ) HTML (1 KB)  PDF  (147 KB)  ( 58 )
127 TALK AGAIN ON THE ELECTROMAGNETIC COMPATIBILITY OF HIGH-SPEED ELECTRIFIED RAILWAY
SHI Jifen
Based o n the develop tendency of the technolog y of the informa tion indust ry , the problems o n the electromag netic compatibi li ty of the hig h-speed elect ri fied railw ays are examined once mo re, a nd sev eral opinions fo r t racing the dev elo p t rend o f the informa tion technologies to put fo rwa rd the resea rch on elet romagnetic compa tibility a re proposed. According to the improv ement of the o ptical communicatio n techno log y, the popula ri za tion of the optica l fiber cable and the application of the digi tal pro g ram co nt ro lled swi tching sy stem, w e sho uld put fo rw ard emphatically on the resea rches o n the dev elo pment and applica tion of the multimedium techno log y, the shielding technique, the application o f f requency band, the testing technique fo r elect romag netic compatibility, etc, so as to creat co ndi tions fo r the const ruction o f the high-speed electrified rai lw ays.
1998 Vol. 15 (4): 127-130 [Abstract] ( 2448 ) HTML (1 KB)  PDF  (116 KB)  ( 157 )
131 Research on Technology for Laying Cable or Optical Cable in Paddy Field
MA Hongsheng
Th e paper ex pounds the specialities o f laying cable o r optical cable in paddy field a lo ng the railwa y in so uth o f o ur co untr y. The technical standa rds fo r la ying ca ble o r o ptical ca ble in th e paddy field a re propo sed. Combined with th e co ntinuous r ainy wea the r, the co rr espo nding constr uction o rg anizatio n and sa fety measures a re put fo rwa rd. Co ncerned with the or ganization of equipments, besides the equipments w hich a re prepar ed fo r laying cable or optical cable in dr y land, the fo llow ing equipments in acco rda nce w ith the paddy field ar e necessa ry: wa ter pump, g enera to r , rainco at, r ubber boo ts, ga lo shes, w ate r ladle, bucket, w ate rproo f tent, etc. The specific implementa tio n pr ocedur es a re also ex pounded in de tail.
1998 Vol. 15 (4): 131-135 [Abstract] ( 2456 ) HTML (1 KB)  PDF  (141 KB)  ( 131 )
136 RESEARCH AND APPLICATION OF SUPERFINE CEMENT AND SODIUM SILICATE MIXED GROUT
ZHANG Minqing　HAN Zhongcui　SHI Hongfeng
The present si tua tio n o f superfine cement in home and abroad i s int roduced here. The fundamental pro perties o f superfine cement and sodium silicate g rout ( called MCS g rout fo r sho rt ) a re researched. It i s applied successfully in satura ted flowing w aterbea ring sand lay er in Yang ti area of Gua ng zho u subw ay.
1998 Vol. 15 (4): 136-145 [Abstract] ( 2434 ) HTML (1 KB)  PDF  (274 KB)  ( 315 )
146 PRACTICAL EXPERIENCE OF FLOOD PROTECTION BY GROUTING FOR GUSHING WATER IN A COMMUNICATION CAVERN OF LPG ENGINEERING PROJECT AT SHANTOU CITY
WANGRucheng　HUANG Pingxian　ZHENG Darong
The communica tion cav ern o f LPG engineering pro ject in Shanto u City is a tunnel w ith the width 7. 2 m, heigh t 5. 7 m, cross-sectio n nea rly 40m2 and hav ing a dow n g radient of 13. 6% . Af ter blasting during the excav atio n o f tunnel reaching 245 m leng th at Februa ry 9 of 1998, the g ushing w ater occurred suddenly at the rig ht side o n the bot tom o f the tunnel. The capaci ty of g ushing w ater w as rather high , nearly 1500 m3 /d through the o bserv atio n and test. The paper int roduces mainly the w hole procedure of the f lood protection engineering t reatment by g routing in detail, a nd therefore, provides the ex perience as a reference fo r the simi lar engineering pro ject.
1998 Vol. 15 (4): 146-149 [Abstract] ( 2461 ) HTML (1 KB)  PDF  (202 KB)  ( 139 )
150 MANUFACTURE OF STEEL GIRDERS FOR CHANGSHI BRIDGE AT SHANTOU
LI Zhongxiang
The Cha ng shi bridg e a t shanto u ci ty is an ex t ra-lo ng highw ay ov ersea cable-stay ed bridg e wi th a main span o f 718 m. The total leng th o f thi s bridg e i s about 1 000 m wi th steel gi rder 718 m in leng th. The w hole steel gi rder is divided lo ngi tudinally into 63 sectio ns whose leng th is 12 m a nd divided t ra nsv ersally into 5 block. The maximum dimensio ns o f th e steel gi rder sections a re width 9 m, heig ht 3 m, leng th 12 m and w eig ht 65 t. The steel girder sections w ere manufactured by Baoji Bridge Factory and w ere erected in si tu by w elding and assembly. This paper introduces brief ly the engineering si tuatio n and the structural po rperties o f the bridg e and ex po unds emphatical ly the technical and productiv e prepa ra to ry w o rks before the manufacture of the steel g irder sectio ns. Combined wi th the di fficulties of i ts ma nufacture, the countermeasures of manufacture tech nolog y, quali ty cont ro l, etc, a re propo sed so as to guarantee the manufacture of steel gi rder and the eng ineering o f bridge.
1998 Vol. 15 (4): 150-162 [Abstract] ( 2462 ) HTML (1 KB)  PDF  (247 KB)  ( 112 )
163 EXPLORATION ON MACHINERY MANAGEMENT FOR CONSTRUCTION PROJECTS
MENG Fanlin
Now aday s, the const ruction technologies are dev elo ped continuously and the construction 's o perating systems a re also renew ed co ntinuously. New requi rement s on the method o f manag ement are proposed for the managed object s wi th dif ferent contents and fo rms. It is necessa ry to make some sy stematic explo ra tion on the manag ed objects w hich are dev elo ped into certain deg ree. Based o n the compa rison of machinery ma nagement betw een the co nst ructio n enterpri se a nd the engineering project, the specialities of the machinery manag ement for the const ruction pro ject are a naly zed. It s principle, missio ns a nd methods a re expounded systema tically. Finally , sev eral key a spects fo r doing w ell the machinery manag ement of construction projects are pointed out th ro ug h comprehensiv e ana lysis.
1998 Vol. 15 (4): 163-166 [Abstract] ( 2455 ) HTML (1 KB)  PDF  (113 KB)  ( 95 )
167 ANALYSIS AND IMPROVEMENT ON DESIGN PROBLEMS OF PG28 RAIL-LAYINGMACHINE
WU Youxiong
The autho rs analy ze and study several pro blems concerned w ith the desig n of the PG28 rail-laying machine, and propose the corresponding improv ement measures.
1998 Vol. 15 (4): 167-173 [Abstract] ( 2437 ) HTML (1 KB)  PDF  (218 KB)  ( 92 )
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