大地测量与地球动力学
 
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2009 Vol.29 Issue.增刊
Published 2009-10-22
论文
1 MODELING INSAR COSEISMIC DEFORMATION FIELDCAUSED BY GAIZE Ms6.9 EARTHQUAKE IN 2008
Tan Kai ;Qiao Xuejun ;You Xinzhao;and Wang Qi;
Taking the InSAR coseismic deformation field as the constraint and adopting the isotropic elastic halfspace dislocation model we made the optimum simulation for the geometric form of the fault in which the Gaize \%M\%s 6.9 earthquake occured in 2008.First we using the model of one fault to model the InSAR coseismic deformation and get the residual deformation 30 cm. Secondly, using the model of two faults the residual deformation is 15 cm, so the model reflects the basic characteristics of the survey deformation field.At last,we obtained the dipslip 95% interval is 1.6~2.4 m based on 20 repected observations. The results suggest that the coseismic deformation is caused by two ruptures.The observations and simulatsed ruslts show that InSAR is the available tool dynamics to monitoring of the Tibtan plateau.
2009 Vol. 29 (增刊): 1-6 [Abstract] ( 1826 ) PDF (3393 KB)   ( 3360 )
7 DISCUSSION ON RELATION BETWEEN VARIATIONS OF GRAVITY FIELD IN HEBEI-SHANDONG-HENAN AREA AND FENGQIU ML4.8 EARTHQUAKE
Feng Jianlin;Qing Jianzeng;Li Deqing;Huang Bangwu;Zhang Yaning;Chen Chunju;and Xu Shunqiang
In the light of the 5 periods of mobile gravity observation results of the JiLuYu network, the relation between the gravity and the Fengqiu earthquake is discussed.
It is found that before and after Fengqiu earthquake
the gravity station value in the juncture area of Hebei，Shandong and Henan under went three stages:first,it went down,then rose and finally,went down again.It reflected the three stages of the Fengqiu earthquake process as seismogenic stageoccurancepostearthquake adjustment.It is proved that the gravity variation in JiLuYu observation region was the anomaly before Fengqiu earthquake.
2009 Vol. 29 (增刊): 7-10 [Abstract] ( 1760 ) PDF (1901 KB)   ( 3012 )
11 ANALYSIS OF MIGRATION CHARACTERISTICS OF TILT INCLINE IN SHAANXI AREA BEFORE AND AFTER WENCHUAN Ms8.0 EARTHQUAKE
Zhang Chuangjun ;and Niu Anfu
Through the analysis of the ground incline observations in Shanxi area before and after Wenchuan\%M\%s8.0 earthquake, it is discovered that the ground incline migrated along the Longmenshan fault zone direction from northeast to southwest epicenter
in Shanxi area before the Wenchuan earthquake, but after the earthquake the migration changed in the opposite direction and the
average migration velocity is 3-4 kilometers/day approximately.By further analysis,it is believed that before the earthquake the migration of ground incline in Shanxi area to the center of Wenchuan Ms8.0 earthquake possibly plays the trigger action, but after the earthquake, the migration of ground incline to the distant field may be the main cause to induce a series strong aftershocks in the border of Shanxi,Gansu and Sichuan province.
2009 Vol. 29 (增刊): 11-14 [Abstract] ( 1791 ) PDF (2267 KB)   ( 2829 )
15 GRAVITY DISTURBANCE OF HIGH FREQUCNCY AT CHENGDU SEISMOSTATION BEFORE WENCHUAN Ms8.0 EARTHQUAKE
Wei Jin;Hao Hongtao;Kang Kaixuan;Liu Ziwei;Yu Jielin;Sun Shaoan;Shen Chongyang;and Li Hui;
About 48 hours before the Wenchuan \%M\%s8.0 earthquake, significant gravity pulsation was observed at the Chengdu seismostation by using GS15 gravity meter. Comparing the earth tide data in different periods of time, it is demonstrated that the significant gravity pulsation are mainly affected by the external factors.32 tropical cyclones, the occurrence of \%M\%s≥6.0 in China and \%M\%s ≥7.0 in world were selected and statistically analyzed. It is shown that the rate of significant gravity pulsation during the occurrence of tropical cyclones is far more than those during before the occurrence of the earthquake, and the same gravity pulsation can be observed by even weaker tropical cyclones. So the significant gravity pulsation at the Chengdu seismostation is mainly affected from the tropical cyclones before the Wenchuan earthquake.
2009 Vol. 29 (增刊): 15-19 [Abstract] ( 1891 ) PDF (2565 KB)   ( 3739 )
20 STUDY ON RELATION BETWEEN FAULT ACTIVITY AND EARTHQUAKE IN SICHUAN-YUNNAN REGION
Li Ruisha;Zhang Xi;Wang Shuangxu;Zhang Sixin;Xue Fuping;and Wang Jiying
This paper choses 16 crossfault deformation observation points in SichuanYunnan region, for analyzing the quantitative relation between the relative sliding of fault plane and relative displacement of the sites on the two walls on ground surface and then calculates the amounts of horizontal twist, vertical displacement and the ratio between them, and analyzs the relation between the ratio and the earthquake activity simply.
2009 Vol. 29 (增刊): 20-24 [Abstract] ( 1825 ) PDF (844 KB)   ( 3038 )
25 SEISMIC RISK ANALYSIS OF RESERVOIR-INDUCED EARTHQUAKE IN JIEMIAN RESERVOIR,FUJIAN
Xu Zhendong ;Lin Songjian ;and Wei Fuquan
The Jiemian reservoir in Fujian was impounded in Feb.,2007.This paper analyses the background of earthquake in Jiemian reservoir area,which are the seismic activity characteristics of epicentral distribution of historical and present records, the depth of the source and the focal mechanism solution. Considering the characteristics of reservoirinduced earthquake it seems that reservoirinduced earthquakes may occur in Jiemian.
2009 Vol. 29 (增刊): 25-31 [Abstract] ( 1995 ) PDF (2017 KB)   ( 3038 )
32 DISCUSSION ON GENESIS OF GUTIAN SHUIKOU RESERVOIR ML4.8
Wu Shaozu;Chen Guang;Guan Yumei;and Ni Xiaoyin
This paper expatiates the characters in Seismogeologic tectonic and seismicity of Shuikou reservoir, then emphasizes the Gutian ML4.8 seismic sequence and the characteristics of stress field in Fujian area when the earthquake took place on March 6,2008. The preliminary conclusions are as follows. a)The Shuikou reservoir was in a obviously stress accumulation field in March 2008. b)The ML4.8 earthquake was a tectonic earthquake of reservoir, the NE wards Wankou fault may be one of the seismic fault. c) The origin time of the first two M4 events was 12 years, that shows the relation between water’s fluctuation and earthquake was not clear and the change of local tectonic stress was determinant factor leading to earthquake of Shuikou reservoir.
2009 Vol. 29 (增刊): 32-36 [Abstract] ( 2030 ) PDF (4477 KB)   ( 3200 )
37 ITRF2005框架下GPS、VLBI和SLR地心坐标速度的精度检测
Rong Min;Sun Fuping ;Zhou Wei ;and Jia Xiaolin
In order to evaluate the real accuracy of the geocentric coordinate velocities determined with GPS,VLBI and SLR under the ITRF200，we compare the geocentric coordinate velocities obtained with the three techniques located on the same site. After that, we can obtain the transformation parameter and analyze mean square error of differences between the geocentric coordinates two by two, which, reflecting the real accuracy of VLBI,GPS and SLR geocentric coordinate velocities, is within 1 mm/a.It is shown that the real accuracy of the geocentric coordinate velocities with VLBI and GPS are better than that with SLR.
2009 Vol. 29 (增刊): 37-40 [Abstract] ( 2315 ) PDF (318 KB)   ( 2350 )
41 DETECTING FREE OSCILLATIONS OF THE EARTH BY USING WATERTUBE TILTMETER OBSERVATIONS AT SHUANGYANG STATION
Deng Na ;Liu Bingbing ;Yang Yaowen ;Jiang Cuirong ;Fan Jinmei ;and Ren Jia

By using digital observations of watertube tiltmeter at Shuangyang station and with power spectrum density estimating method, acquire 0S3～0S31 fundamental sphere free oscillations caused by Sumatra earthquake on 26th Dec, 2004 were obtained, without deleting influence of the earth tide on the data, then we compared it with theoretical free oscillations cycle of PREM model, and found out that the actual measurement cycle is accordant with PREM forecasting oscillations cycle. Besides the difference between the vibration observation cycle of 0S3,0S4 mode and PREM model cycle is more than 0.3%, other differences are about 0.1%.In the same time we detected five harmonic frequency sphere oscillations and eight ring oscillations.
2009 Vol. 29 (增刊): 41-44 [Abstract] ( 1871 ) PDF (847 KB)   ( 3255 )
45 RESEARCH ON PRESENT-DAY CRUSTAL MOVEMENT AND DEFORMATION IN FUJIAN AREA
Zhan Hui ;Liang Quanqiang ;Lin Shubing ;Xu Yixi ;and Yang Jie
By utilizing the observations of the 2003, 2005 and 2008 from Fujian GPS seismic monitoring network, the movement velocities of GPS stations and distribution of shearing strain in Fujian aera in 2008 are calculated.The results are as follows.The direction of movement vector of GPS stations in Fujian aera is generally east by south, and the value is about 40 millimeters.Velocity field values of two periods of 2003-2005 and 2005-2008 are almost the same, but the direction changed somewhat.As regards the shearing strain,between Putian and Fuzhou and between Quanzhou and Putian it becomes less,as the place is more close to main fault,is increasingly small on major fracture zone, and the difference between shearing strains on the two sides of fault is not evident.In coastal area between Xiamen and Zhangzhou, and approaching to the sea,shearing strain is gradually increasing. Between Xiamen and Quanzhou and near Xiamen, there exists a relatively bigger gradient zone.
2009 Vol. 29 (增刊): 45-48 [Abstract] ( 1770 ) PDF (1339 KB)   ( 3109 )
49 ON CRUSTAL DEFOMATION CHARACTERISTICS OF FUJIAN AERA
Chen Guang;Li Zuning;and Wang Ziyan
By use of the joint solution results of the GPS continuous observation data from
the crustal movement observation network in Fujian and Taiwan Taoyuan IGS international fiducied station publicated by
the crustal deformation features of Fujian inland, and the relative movements between the both sides of the Taiwan strait during the last five years,it is indicated that the movements of southern and easeern Fujian inland are stronger than those of north and west Fujian;the extensional state of the Taiwan strait becomes compressive state,and there is differential movement between the south and north Fujian.
2009 Vol. 29 (增刊): 49-52 [Abstract] ( 1625 ) PDF (1478 KB)   ( 3014 )
53 SEISMIC ACTIVITY AND CONTINENTAL DYNAMIC BACKGROUND IN SOUTHWESTERN GUIZHOU AND ITS ADJACENT REGION
Chen Benjin;
The paper explored the characteristics of neoectonic movement, the regularity of sesmic activity and the seismic machanism in suthwestern Guizhou, by analysizing for continental dynamic background, seismomic data and geologic data.
2009 Vol. 29 (增刊): 53-58 [Abstract] ( 1936 ) PDF (735 KB)   ( 3565 )
59 EFFECT OF WENCHUAN EARTHQUAKE ON SEISMIC ACTIVITY IN HUBEI
Wu Haibo;Yao Yunsheng;and Xue Junrong
Effect of Wenchuan earthquake on Hubei seismic activity is discussed on the basis of the tectonic evolution, the historical seismic activity and seismic focal mechanism solutions and the conclusion considered that Longmenshan fault and the XiangfanGuangji tectonic belt are the western and northern marginal belts of the Yangzi plate which thrusts and intervenes downwards the Tibet and Qinling blocks.
The statistics of historical strong earthquakes indicate that the strong earthquakes in western Sichuan region evidently affect seismic activity in Hubei and its adjacent region, after Wenchuan earthquake, it will be possible occuring mediummagnitude earthquakes, besides it points out that the seismic activity of Hubei province in recent several years was the adjustment of the eastern stress field in Hubei before Wenchuan earthquake.
2009 Vol. 29 (增刊): 59-65 [Abstract] ( 1995 ) PDF (3826 KB)   ( 3052 )
66 ORIGIN AND CAUSE OF GENERATION OF WENCHUAN Ms8.0 EARTHQUAKE
Yu Zhendong
The main origin of the great Wenchuan Ms8.0 earthquake is a large GLE on January 20, 2005 which is the second largest GLE in recent 70 or more years since the continued observation of cosmic rays. Thus, in past 108 years at least 8 in all of 9 earthquakes of magnitude 8 occurred in China were caused by large enhancement of cosmic ray environment. The cause of formation of the Wenchuan earthquake reads as follows: Massive cosmic rays caused by large enhancement of cosmic ray environment produce current system in the ionosphere, through electromagnetic induction the current system produces inductive current system within the earth which produces burning gasifying cavity in the enriched region of uranium or thorium.The high temperature and high pressure further lead to nuclear fission combustion and nuclear fusion combustion in the burning cavity and then the very high temperature and very high pressure caused by continued nuclear combustion finally lead up to a burst of surrounding rock of the burning cavity , thus a large earthquake occurs. The observational data and seismic tomography have already confirmed that below the focus of the Wenchuan earthquake there is a very high temperature region. On these grounds,the paper proses a new idea and method for early warning large earthquakes.
2009 Vol. 29 (增刊): 66-71 [Abstract] ( 2205 ) PDF (420 KB)   ( 3433 )
72 ANALYSIS OF DIGITALIZED WATER TUBE TILTMETER DATA AT XIANMEN SEISMOSTATION
Huang Xiaohua ;Chen Chuanchang ;Chen Zhiyong and Lin Lifeng
The tilt data observed during 2004 to 2007 with DSQ water tube tiltmeter at Xiamen seismostation are assessed in quality and an analysis of the main disturbances of the ground tilt observations is made as well. The following conclutions are drawn: 1) The general quality of the observations meets ordinary requirements of deformation surveying standard and reaches the national advanced level. 2)
There is a certain gap between the noise level and the RMS error of M2 tidal factor and characterizing the inherent accuracy of the data and those observed at some advanced stations. 3) The main disturbance factor impacting observations is sea tide.
2009 Vol. 29 (增刊): 72-75 [Abstract] ( 1926 ) PDF (432 KB)   ( 2998 )
76 EFFECT OF HEAVY RAINFALL ON EXTENSOMETER AT XIAMEN SEISMOSTATION
Yang Jie ;Zhan Hui ;and Ling Xuecai
The results from study on some abnormity phenomal of extensometer at Xiamen seismostation show that the anomalies are not effect of earthquake but heavy rainfall
2009 Vol. 29 (增刊): 76-78 [Abstract] ( 1913 ) PDF (688 KB)   ( 3297 )
79 EFFECT OF LEVEL CHANGE OF HUANGBAI RIVER ON GROUND TILT OBSERVATIONS AT YICHANG STATION
Yuan Qu;Huang Zhong;Wang Hui;Zhang Hui; and Liu Fu
Through the analysis of the ground tilt observations and the water level data of the Huangbai river in flood season and dry season the relation between the ground tilt data at Yichang station and the water level data is obtained,and it is found that the ground tilt variation is affected by the water level change of the Huangbai river.
2009 Vol. 29 (增刊): 79-83 [Abstract] ( 1794 ) PDF (3083 KB)   ( 3485 )
84 INFLUENCE OF FLOOD DISCHARGE AND SAND SCOURING OF THREE GORGES RESERVOIR AND GEZHOUBA RESERVOIR ON DEFORMATION OBSERVATION AT YICHANG SEISMOSTATION
Yuan Qu;Wang Hui;Huang Zhong;Zhang Hui;and Liu Fu

The nontidal spacetime,strength and frequency characteristics from the impoundment,flood discharge and sand scouring in the Three Gorges reservoir and Gezhouba reservoir are analyzed and their affects on crust deformation at Yichang station are researched.

2009 Vol. 29 (增刊): 84-89 [Abstract] ( 2142 ) PDF (3419 KB)   ( 3891 )
90 ANALYSIS OF CAUSE OF LAND SUBSIDENCE IN SHANGHAI
Chen Zhengsong ;Luo Zhicai ;and Li Qiong
The center zone of Shanghai city is selected as experimental zone so as to analyze synthetically the weight of every influence factor of land subsidence and establish the predictive model of land subsidence by using hierarchial analysis method.At the same time, fitting correlation analysis is carried out towards the major factor,i.e. ground water which affects related with land subsidence. It further proves that the depth of land subsidence is related to the rate of ground water pumping.
2009 Vol. 29 (增刊): 90-94 [Abstract] ( 1942 ) PDF (1229 KB)   ( 3893 )
95 DAMAGE SURVEY OF BUILDINGS IN WENCHUAN Ms8.0 EARTHQUAKE
Lei Jingya;Huang Jiang;and Hu Jian;
Through the damage survey of the civil architecture in Wenchuan Ms8.0 earthquake on May 12,2008,
the earthquake damage characteristics of houses and the destruction reason are summarized.
2009 Vol. 29 (增刊): 95-97 [Abstract] ( 1729 ) PDF (1608 KB)   ( 3521 )
98 EXPLORATION OF DISASTER CHARACTERISTICS AND DAMAGE CAUSES OF LARGE SPAN UNDERGROUND STRUCTURE
Feng Qian;and Huang Jiang
Classifying and summarizing the characteristics of disaster damage of subway station, subway excavation with cutandcover method and shield tunnel, the article makes preliminary analysis of the reason of instability by unifying the seismic damage performance of the Kobe subway in the great Han Shin earthquake in Japan.Through the analysis it is turned out that there are three basic kinds of damage:bent damage,shear damage and joint damage from the above both and it is found that the main cause of the subway damage is adjoining rock instability and the structure in shallow layer.
2009 Vol. 29 (增刊): 98-102 [Abstract] ( 1906 ) PDF (572 KB)   ( 3549 )
103 SHORT-LINE LEVELING ANOMALY AT GENGDA AND WENCHUAN Ms8.0 EARTHQUAKE
Su Qin ;Zhu Hang ;and Yang Yonglin
Combining the other data cross Longmenshan fault,we have made a frech analysis of the shortline leveling at Gengda before and after the Wenchuan earthquake.It is found that the change of the shortline leveling was caused by construction of living houses in the locality,but earthquake pracursory anomaly.
2009 Vol. 29 (增刊): 103-105 [Abstract] ( 1836 ) PDF (1023 KB)   ( 3073 )
106 ROLE OF CHINA EARTHQUAKE ADMINISTRATION WEBSITE IN EARTHQUAKE EMERGENCIES
Cao Sa
Nowadays, the internet has been gaining social influence over China and internet media is becoming a mainstream form of publication in China. The China Earthquake Administration Website is the official web portal of the China Earthquake Administration and it is a key information platform of disaster protection and reduction during earthquake emergencies. At the same time, it is an authoritative channel and source of earthquakerelated information for interested organizations, mass media and the general public. Hence, with the development of the internet, the roles of the China Earthquake Administration Website, in regard to guiding public opinions, policy propagation, communications, earthquake relief incentives, online interaction, popular science of earthquake, assisting earthquake relief, etc. all are studied.
2009 Vol. 29 (增刊): 106-109 [Abstract] ( 2365 ) PDF (466 KB)   ( 2805 )
110 A METHOD FOR SEISMIC DATA ACQUISITION OF MULTIPLE SERIAL PORTS
Ding Wei;Liao Chengwang;Deng Tao;and Wang Hao
Universal Asynchronous Receiver Transmitter(UART) is widely used in earthquake monitoring system to monitor data and transmit command. Because of the insufficient quantity of serial ports of some core devices, multiple extended serial ports are needed. A method based on TL16C754B to expand multiple serial ports is proposed and the design of systems circuit and source code are put forward.
This design has several advantrages: low cost, high steady, low power, anti-interference ability, compact circuit, etc. so is successfully used in microtremor observation system.
2009 Vol. 29 (增刊): 110-113 [Abstract] ( 1924 ) PDF (1612 KB)   ( 3838 )
114 RESEARCH ON DATA STORAGE TECHNIQUE BASED ON ARMAND SD CARD FOR MICROTREMOR DATA ACQUISITION SYSTEM
Chen Weiming;Liao Chengwang;Deng Tao;Ding Wei;and Wang Hao;
To meet the request of large volume of data and low power consumption in the microtremor data acquisition system, we use SD card to memory data collected by the microtremor data acquisition system. The article describs mainly how to realize the memory function of SD card in the microtremor data acquisition system which regards Samsung ARM9s3c2410 as hardware platform and Linux as software platform.
2009 Vol. 29 (增刊): 114-119 [Abstract] ( 2294 ) PDF (1649 KB)   ( 3243 )
120 FIELD CONTINUOUS MONITORING SYSTEM FOR FAULT ACTIVITY
Xu Chunyang;Yang Jiang;Gao Ping;Deng Tao;Du Weimin;and Lu Chongwu
The component, arrangement and technical indexes of the field continuous monitoring system for fault activity are intruduced.
2009 Vol. 29 (增刊): 120-121 [Abstract] ( 1545 ) PDF (480 KB)   ( 3040 )
122 DESIGN AND IMPLEMENTATION OF SERIES COMMUNICATIONSYSTEM BETWEEN PC & MICROCONTROLLER BASED ON RS-485 BUS
Peng Hongwei;Bian Zhiyuan;and Li Cuixia
Through the experiments the principle of serial communication between PC and microcontroller based on RS485 and the choice of the chip is introduced, then an method is given,which can be used for implementing the multipoint communication between PC and microcontroller.
2009 Vol. 29 (增刊): 122-123 [Abstract] ( 1671 ) PDF (463 KB)   ( 3479 )
124 DESIGN OF DIGITAL FILTER FOR NARROW BAND SIGNAL
Wu Tao;Zhou Yunyao;and Zhao Fenghua
A special digital filter called cascade integrator combination digital filter which could filter the narrow band signal is introduced. It is very effectively to reduce sampling frequency by sampling points, which does not affect the useful signal. If we design FIR Kaiser windows filter,the effect of narrow band signal filtering will be good. At the same time, the use of SPTool which is a part of Matlab software to design FIR Kaiser windows filter is introduced.
2009 Vol. 29 (增刊): 124-127 [Abstract] ( 1737 ) PDF (1393 KB)   ( 5056 )
128 ON RECOGNITION AND ELIMINATION METHODOF ELECTROMAGNETIC INTERFERENCE IN EARTHQUAKE INSTRUMENT SYSTEM
Jiang Dan;Zou Tong;Chen Zhigao;and Guo Tangyong
Since an earthquake instrument system is affected by EMI (Electromagnetic Interference), then it often gives false alarm.
A recognition and elimination method based on the theory of FSM (Finite State Machine) is proposed, and has been put to use in the products. The false alarm rate of the system is reduced availably, and the system reliability is simultaneously
improved.
2009 Vol. 29 (增刊): 128-130 [Abstract] ( 1796 ) PDF (1282 KB)   ( 3136 )
131 NVESTIGATION OF FIVEDAY REPORT GENERATED BY xxx.obs DOCUMENTS
Ding Wenxiu;Wang Huiqun;Yin Suwen;and Zhang Nian
When using EDSPIAS to analyse the earthquake events the corresponding xxx.obs documents for each individual event can be generated and combined to create fiveday report， this operation is of less workload and good efficiency.
2009 Vol. 29 (增刊): 131-133 [Abstract] ( 1816 ) PDF (1548 KB)   ( 3436 )
134 MANAGEMENT OF PLUMB-LINE OBSERVER OF CG-2A TYPE OPERATING IN FIXED MODE
Bian Zhiyuan and Cai Qingfu
The plumbline observer of CG2A type operating in fixed mode is introduced and a comparison of which with that in the portable mode is given.
2009 Vol. 29 (增刊): 134-135 [Abstract] ( 1679 ) PDF (312 KB)   ( 2623 )
136 RESEARCH ON FOCUSING RUNNING ERROR OFTELESCOPE OF GEODETIC INSTRUMENT
Liu Haibo; Lin Mo;and Yang Boxiong
Reason for focusing running error of telescope of geodetic instrument has been researched. Meanwhile,the method that tests the focus running error by using JSJ integrating inspection instrument through an example of theodolite is introduced.
2009 Vol. 29 (增刊): 136-137 [Abstract] ( 2123 ) PDF (421 KB)   ( 2841 )
138 SEVERAL POINTS FOR ATTENTION IN INSTALLATION AND OPERATION OF MODEL SS-Y EXTENSOMETER
Xu Chunyang;Yang Jiang;and Zhang Shuangfeng
This paper will discuss several points needing attention,in installation and operation of model SSY extensometer.
2009 Vol. 29 (增刊): 138-140 [Abstract] ( 1720 ) PDF (603 KB)   ( 3134 )
141 APPLICATION OF PCI9052 IN PCI INTERFACE CARD
Ma Wugang;Wu Yanxia;and Wu Pengfei
Combining some applications,the problems that should be paid attention to in the development process of PCI9052 interface card are in introduced.
2009 Vol. 29 (增刊): 141-143 [Abstract] ( 1618 ) PDF (1559 KB)   ( 3490 )
144 ON UITRASONIC PRECISION MACHINING FOR OPTICAL GLASS
Zhang Li;Li Shude;Cai Qingfu;and Li Cuixia
For solving some difficult problems in optical glass processing, such as hole drill,narrow grooving and fine processing,taking the processing of the glass substrate of a certain sensor as an example,on the basis of analyzing the physical property of optical glass and the
principle of ultrasonic mechining the applicability of ultrasonic machining on optical glass is verifield,as the result shows this kind of processing goose well.
2009 Vol. 29 (增刊): 144-146 [Abstract] ( 1617 ) PDF (932 KB)   ( 3771 )
147 APPLICATION OF WIRELESS VPN TECHNIQUE IN DIGITAL PRECURSOR STATION NETWORK
Zheng Shuping and Jian Daxi
The technology of VPN is a secured private network connection,which provides remote intranetaccessing connection via public network. It introduces some principles of VPN technology and take Hubei digital precursor station network as example to explain how to establish the wireless VPN connection. It has some characteristics such as inexpensive, convenient, wireless transmission, lineate connection.
2009 Vol. 29 (增刊): 147-150 [Abstract] ( 1728 ) PDF (1233 KB)   ( 3266 )
151 RECEIVING DATA STREAM OF IRIS AND ITS APPLICATIONTO FUJIAN SEISMIC NETWORK
Chen Zhiyong;Chen Sansan;Zhang Hua;and Xu Jiajuan
In order to achieve the sharing of network resources and improve positioning accuracy of earthquake in FujianTaiwan area, this paper researches and achieves the method for the realtime data transmission between SeedLink protocol and NetSeis/IP protocol. It can make us acquire nearrealtime data from IRIS and apply the data to rapid earthquake information report.Meanwhile, it improves the positioning accuracy of earthquakes in FujianTaiwan area on the platform of realtime rapid earthquake information report system of
local seismic network.
2009 Vol. 29 (增刊): 151-154 [Abstract] ( 2022 ) PDF (1338 KB)   ( 4324 )
155 STATUS AND PRACTICAL DEVELOPMENT OF MONITORING TECHNIQUE FOR MULTIMEDIA DIGITALIZED VIDEO
Wu Peng
The technology related to the digitized video monitoring and its prospect are introduced and the development trend of next generation product is discussed.The following contents are describeds:1)Video compression algorithm which is the technique diciding the main characteristics of products.2)Network techniques which is the formation base facing for multpurpose video multimedia equipment and largescale digital video multimedia network sysytem.3)Intelligent technique that the digital video system can provide various intelligent functions for different applied fields.
2009 Vol. 29 (增刊): 155-158 [Abstract] ( 1668 ) PDF (400 KB)   ( 2769 )
159 ON EXPRESSION OF ARCTIC OCEAN NAVIGATION ROUTE ON WORLD MAPS AND RELATIVE PROBLEM
Liao Xiaoyun ;Xu Hanqing ;Wang Bing ;Zhang Hanmei ;Liu Genyou ;Xue Huaiping ;Hu Xiaogang ;and Hao Xiaoguang
As global temperatures are rising and ice melting in Arctic becomes more and more serious,the global warming may cause a new maritime line, Arctic maritime line, to be formal in the world, and Arctic will become the Mediterranean of the world in the near future.
The new world map edited by us has special advantage to clearly show this future new maritime line and directly compare it with Suez maritime line, Panama maritime line and Cape of Good Hope maritime line.It is well seen clearly that the new maritime line is the shortest line for connecting Europe and Asia, much shorter than other three lines. Thus Arctic maritime line will highlight the strategic significance of Arctic in the near future.
2009 Vol. 29 (增刊): 159-162 [Abstract] ( 1651 ) PDF (1244 KB)   ( 3644 )
163 SEISMOGENESIS—— VARYING VELOCITY AND DEFORMATION OSCILLATION OF THE EARTH ROTATION
Li Shihong
From the theory that a set of balance points which are on the surface of structural body in a natural balanced space form the curved balance surface of the body’s surface,the law of balanced curve distance and law of balance curved surface distance of a natural structural body in the natuiral balanced space are drived from the ‘law of balance point distance’ of structural.The ‘rotationoscillation effect’of ordinary structural body in the natural balance space is proved and the varying velocity,varying form and their cause and result of each other of rotating point,line,plane and body and their own oscillation are discussed.The ‘flattering effect with deceleration of rotation’ and ‘sphericizing effect with acceleration of rotation’ of the rotaling sphere and rotation oscillation are expoconded.According to above laws and principles the seismogenesis is explored and the combination rotationoscillation model of resonator for seismogenesis is put forward.
2009 Vol. 29 (增刊): 163-173 [Abstract] ( 1707 ) PDF (725 KB)   ( 3073 )
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