This paper uses a data sample from listed companies in the national port industry from 2007 to 20... more This paper uses a data sample from listed companies in the national port industry from 2007 to 2020 to systematically explore the impact of trade policy uncertainty on the supply chain efficiency of listed companies in the national port industry and its mechanism based on the events of Sino–US trade policy changes. It is found that the increase in trade policy uncertainty significantly reduces the enterprises’ supply chain efficiency. The further influence channel test shows that the increase of trade policy uncertainty inhibits the improvement of enterprises’ supply chain efficiency by reducing the export quantity and technological innovation channel of enterprises. From the perspective of trade policy changes, this paper provides a new explanation for understanding the dynamic changes in the supply chain efficiency of Chinese enterprises in recent years and enriches relevant research on evaluating the economic effects of trade policy uncertainty.
Data warehousing and On-line Analytical Processing(OLAP) are two of the significant new technolog... more Data warehousing and On-line Analytical Processing(OLAP) are two of the significant new technologies in the business data processing and DSS area.The authors discuss a model of data warehousing solution basic on OLAP technology and L-B Computer Integration Manufacture System(LB CIMS).It is useful for improving the OLAP application in(data) warehouse.This paper discusses design and implemention of OLAP application to the business inventory Decision Support Systems.
Excel software in today's society has become a necessary tool.It can be used in addition to t... more Excel software in today's society has become a necessary tool.It can be used in addition to the production of tables and charts, simple operation,but also to manage the data,and as a basis for data analysis.But most people use Excel,simply use the menu offers the sort of software to automatically filter and other commonly used functions,and mathematical functions such as sum,in dealing with the simplest form of data very fast and convenient,but when the actual work data processing requirements to be more complex to do nothing, and turned to other people or other software tools.This article will work in conjunction with their practice,through the flexible application of the function is implemented in the Excel database applications to solve complex problems in a number of data processing methods and techniques.
Proceedings of the 3rd International Conference on Computer Science and Service System, 2014
In cooperative OFDM system, because of the OFDM technology, cooperative communication system is v... more In cooperative OFDM system, because of the OFDM technology, cooperative communication system is very sensitive to carrier frequency offset, a tiny carrier frequency offset will cause the inter-carrier interference. An estimation algorithm of carrier frequency offset based on signal reconstruction is proposed in this paper, the value of carrier frequency offset is estimated by the tracking algorithm, and the estimation algorithm can adjust the action of system in real-time. Through the simulation, it indicated that the estimation algorithm proposed can track the change of carrier frequency offset correctly, and make appropriate adjustment quickly. Generally speaking, it has advantages of rapider response and more accurate estimation.
Intradural metastasis of small cell lung carcinoma in conus medullaris is an uncommon disease. We... more Intradural metastasis of small cell lung carcinoma in conus medullaris is an uncommon disease. We report a case of lung cancer complicated with intradural metastasis in conus medullaris with just a symptom of hypoesthesia of the lower right limb and lower extremity weakness. The patient was initially suggested a clinical diagnosis of spinal meningioma or astrocytoma, according to the clinical symptom and the diseased region in imaging manifestation. Confirmed diagnosis was performed by histopathology and immunohistochemistry, revealing to be a malignant metastasis of small cell lung carcinoma. The patient underwent complete resection, and recovered well, although with pulmonary primary lesion to be treated. The tumor was 0.5×0.5×0.3cm in size and in contact with the conus medullaris. The aim of this study is to emphasize the importance of careful and comprehensive radiological examination and to reflect the difficulty of tumor resection. After the orthopedic surgery, the patient rec...
Angewandte Chemie (International ed. in English), Jan 12, 2018
Non-alternant, non-benzenoid π-conjugated polycyclic hydrocarbons (PHs) are expected to exhibit v... more Non-alternant, non-benzenoid π-conjugated polycyclic hydrocarbons (PHs) are expected to exhibit very different electronic properties from all-benzenoid PHs. Herein, we report the synthesis and physical properties of four derivatives (1a-b, 2a-b) of two azulene-fused s-indacene isomers, the diazuleno[2,1-a:2',1'-g]-s-indacene (DAI-1) and diazuleno[2,1-a:1',2'-h]-s-indacene (DAI-2). The backbone of both isomers contains 28 πe and is a 7-5-5-6-5-5-7 fused ring system. X-ray crystallographic analysis, NMR spectra, and theoretical calculations (ACID, NICS) reveal a structure with two aromatic azulene units fused with a central anti-aromatic s-indacene moiety. All compounds exhibit open-shell diradical character and are magnetically active, but the derivatives of DAI-2 show larger radical character than the respective ones of DAI-1. Their dications were isolated in crystalline form and all experimental and theoretical analysis disclose a shift of local (anti)aromaticity al...
We investigate the P‐wave velocity structure of the crust and upper mantle down to depth 400km be... more We investigate the P‐wave velocity structure of the crust and upper mantle down to depth 400km beneath the Ordos region and northeastern Qinghai‐Xizang plateau using the seismic tomographic technique. The data used are taken from the record by the regional network and a passive seismic observation profile across the investigated area, respectively. Our results show clear lateral variations of the crust and upper mantle velocity structure along the profile, which exist not only between different blocks, but also inside blocks. The average P‐wave velocity of the crust and upper mantle beneath the northeastern margin of the Qinghai‐Xizang plateau is lower, and that beneath the Ordos block is higher than the global model. Our observations are coincident with the tectonic activities of these two blocks. Between the northeastern Qinghai‐Xizang and Ordos block exists a transition zone about 200km wide, which on the surface corresponds to the region between Lanzhou and Haiyuan. This transit...
In our previous study, oxidized dextran/amino gelatin (ODex/MGel) self-crosslinking hydrogels hav... more In our previous study, oxidized dextran/amino gelatin (ODex/MGel) self-crosslinking hydrogels have been successfully prepared. Though their potential applications as in situ forming scaffolds for tissue engineering have been verified, the subcellular porosities of hydrogel networks which were induced by the intensity chemical crosslinking still pose a barrier for cells migration and proliferation within the hydrogels. The objective of this study was to develop an approach to accelerate cellular remodeling by preparing semi-interpenetrating networks (semi-IPNs) composed of ODex, MGel, and sodium hyaluronic (HA). Results showed that the addition of HA at the concentrations of 0.09% and 0.18% can greatly promote pre-osteoblast (MC3T3-E1) cells spreading throughout the ODex/MGel hydrogel networks. Therefore, these semi-IPNs hydrogels could be useful matrixes for cell transplantation in a variety of tissue engineering applications.
In view of tracking problems of hypersonic target in near space, such as large manoeuvring and di... more In view of tracking problems of hypersonic target in near space, such as large manoeuvring and difficulty to measure and so on, a new Sine tracking model based on characteristics analysis of gliding trajectory is proposed. Firstly, target of gliding trajectory has characteristics such as long distance, low energy costs and strong defending, and flight forces and motion are mainly analyzed, to reduce measure errors for model lost correlation. Then based on the full analysis of target hypersonic characteristics, non-periodic random, Sine model is built scientifically, to solve the problem that routine tracking model is only able to track low dynamic changing target. Finally, Sine model tracking on ECEF (Earth-centred Earth-fixed) coordinate is used to further improve on the hypersonic target tracking. Compared with other simulation models such as Singer and Jerk, Sine model will further improve the precision of locating and tracking.
Objectives: To investigate the relationship of the coated stents of mesenchymal stem cells (MSCs)... more Objectives: To investigate the relationship of the coated stents of mesenchymal stem cells (MSCs) and the restenosis after the operation of canine coronary artery stent implantation. Methods: The ethyl cellulose as the coating substrate was used to coat the stent and then the mesenchymal stem cells antibody. ② Build the canine coronary artery stenosis model by the balloon dilation. Implant the coated stents (n=20) with the coated antibody into the far end of the damaged segment of the coronary artery by applying the standard catheter-balloon technique. Then implant the bare stents (n=20) into the near end of the damaged segment. After 4 weeks, animals are sacrificed. Take out the stents and analyze the vascular cavity area and intimal area by the mean of intravascular ultrasound (IVUS) and vascular morphology inspection. Results: The minimum lumen diameter(MLD)and intimal area ( IA) of the mesenchymal stem cells coated stents group significantly decrease, comparing to the bare stents group (P0.05) and the minimum lumen area (MLA) significantly increases (P0.05). Conclusion: The coated stents of mesenchymal stem cells rapidly repair the damaged tunica intima and reduce the occurrence of the restenosis.
Advanced materials (Deerfield Beach, Fla.), Jan 12, 2016
Acceptor end-capping of oligomeric conjugated molecules is found to be an effective strategy for ... more Acceptor end-capping of oligomeric conjugated molecules is found to be an effective strategy for simultaneous spectra broadening, extinction coefficient enhancement, and energy level optimization, resulting in profoundly enhanced power conversion efficiencies (of 9.25% and 8.91%) compared to the original oligomers. This strategy is effective in overcoming the absorption disadvantage of oligomers and small molecules due to conjugation limitation.
An efficient scheme for photon statistics measurement is presented based on the Hanbury-Brown-Twi... more An efficient scheme for photon statistics measurement is presented based on the Hanbury-Brown-Twiss configuration. We set the sampling time Ts to satisfy the relationship of Ts < T d < Tm, where T d is the dead time of each detector and Tm is the laser pulse repetition period. And each single photon detector cannot detect more than one photon in each pulse. The approach can sufficiently eliminate the influences of the detector's dead time on photon statistics. At last, the photon statistics of coherent field is experimentally determined.
In this study, in terms of the nonlinear inversion method of receiver functions, we investigated ... more In this study, in terms of the nonlinear inversion method of receiver functions, we investigated the S-wave velocity structure of the crust and upper mantle beneath the capital circle region from teleseismic broadband waveform data recorded at 40 movable stations deployed over the Tangshan earthquake region in 2002~2003 by the Laboratory of Lithospheric Seismic Array, Institute of Geology, China Earthquake Administration and recorded at 33 permanent stations of the Digital Seismic Network in the Capital Circle. Based on these results, combining the S-wave velocity structures of the crust and upper mantle beneath 15 moveable broadband seismic stations over the Yanhuai basin by Liu et al. (1997), we present the S-wave velocity distribution along the profiles with different azimuths and horizontal distributions at different depths over the region of 39°～41°N and 114°~119.5°E. Our results show much higher spatial resolution than those given by the former studies by simultaneously using ...
International Conference on Neural Networks and Signal Processing, 2003. Proceedings of the 2003, 2003
This paper is devoted to the discussion of a new kind of sigma-delta modulator as signal expressi... more This paper is devoted to the discussion of a new kind of sigma-delta modulator as signal expression, by which the higher-bit input signal can be represented as a lower-bit digital signal. The quantized noise shaping and noise frequency spectrum are discussed and compared with the conventional sigma-delta modulator. The theoretic analysis shows that the new modulator is stable. A kind of DDC based on this modulator is designed and simulated.
Different species of sarcosaphagous insects are found on human corpses at different phases after ... more Different species of sarcosaphagous insects are found on human corpses at different phases after death, which is important for the estimation of postmortem interval (PMI) and other questions of forensic relevance. Calliphoridae are one of the earliest visitors to infest a corpse and lay their eggs, and develop maggots. Following the conventional method by morphology, a molecular method is a necessary assistance of species identification. This study has investigated the applicability of sequencing of mitochondrial DNA (mtDNA) based on a 250 base pair region of the gene for 16S rDNA to identify the forensically important species of Calliphoridae which were collected from 10 sites distributed at 9 provinces in China, including 25 specimens (8 species) in 3 genera of Calliphoridae family, including some specimens of Chrysomya megacephala (Fabricius), Chrysomya rufifacies (Macquart), Calliphora vicina (Robineau-Desvoidy), Lucilia caesar (Linnaeus), Lucilia porphyrina (Walker), Lucilia sericate (Meigen), Lucilia bazini (Seguy), Lucilia illustris (Meigen). The analysis of 16S rDNA sequences revealed abundant phylogenetically informative nucleotide substitutions that could identify Calliphoridae to species group. It renders the reliable identification of important sarcosaphagous insects in China, particularly in case of murder or suspicious death by providing an estimate of post-mortem interval (PMI) and scene of crime.
The newly developed Digital Seismic Network in Capital Circle consists of 107 stations, the seism... more The newly developed Digital Seismic Network in Capital Circle consists of 107 stations, the seismic monitoring and epicenter determination capabilities of which need to be verified. In epicenter determination, we should bring the superiority of digital seismic record into full play, and improve the reliability and precision of epicenter determination by using the corresponding digital processing technique. In this study, several digital processing techniques, including digital filtering, polarization analysis, station scanning and phase tracing, are used for improving the phase identification in the epicenter determination. Totally, 7 microearthquakes ( M L2.0) recorded by the Digital Seismic Networks in Capital Circle in 2000 were located precisely by using the Geiger method. In addition, the reliability and precision of the method and program have been verified by determining the epicenters of artificial events. It is shown that the error of epicenter location is less than 2.0km and the error of focal depth determination is less than 3.0km. The results of this study can be used for evaluating the seismic monitoring capability of the Digital Seismic Network in Capital Circle.
This paper uses a data sample from listed companies in the national port industry from 2007 to 20... more This paper uses a data sample from listed companies in the national port industry from 2007 to 2020 to systematically explore the impact of trade policy uncertainty on the supply chain efficiency of listed companies in the national port industry and its mechanism based on the events of Sino–US trade policy changes. It is found that the increase in trade policy uncertainty significantly reduces the enterprises’ supply chain efficiency. The further influence channel test shows that the increase of trade policy uncertainty inhibits the improvement of enterprises’ supply chain efficiency by reducing the export quantity and technological innovation channel of enterprises. From the perspective of trade policy changes, this paper provides a new explanation for understanding the dynamic changes in the supply chain efficiency of Chinese enterprises in recent years and enriches relevant research on evaluating the economic effects of trade policy uncertainty.
Data warehousing and On-line Analytical Processing(OLAP) are two of the significant new technolog... more Data warehousing and On-line Analytical Processing(OLAP) are two of the significant new technologies in the business data processing and DSS area.The authors discuss a model of data warehousing solution basic on OLAP technology and L-B Computer Integration Manufacture System(LB CIMS).It is useful for improving the OLAP application in(data) warehouse.This paper discusses design and implemention of OLAP application to the business inventory Decision Support Systems.
Excel software in today's society has become a necessary tool.It can be used in addition to t... more Excel software in today's society has become a necessary tool.It can be used in addition to the production of tables and charts, simple operation,but also to manage the data,and as a basis for data analysis.But most people use Excel,simply use the menu offers the sort of software to automatically filter and other commonly used functions,and mathematical functions such as sum,in dealing with the simplest form of data very fast and convenient,but when the actual work data processing requirements to be more complex to do nothing, and turned to other people or other software tools.This article will work in conjunction with their practice,through the flexible application of the function is implemented in the Excel database applications to solve complex problems in a number of data processing methods and techniques.
Proceedings of the 3rd International Conference on Computer Science and Service System, 2014
In cooperative OFDM system, because of the OFDM technology, cooperative communication system is v... more In cooperative OFDM system, because of the OFDM technology, cooperative communication system is very sensitive to carrier frequency offset, a tiny carrier frequency offset will cause the inter-carrier interference. An estimation algorithm of carrier frequency offset based on signal reconstruction is proposed in this paper, the value of carrier frequency offset is estimated by the tracking algorithm, and the estimation algorithm can adjust the action of system in real-time. Through the simulation, it indicated that the estimation algorithm proposed can track the change of carrier frequency offset correctly, and make appropriate adjustment quickly. Generally speaking, it has advantages of rapider response and more accurate estimation.
Intradural metastasis of small cell lung carcinoma in conus medullaris is an uncommon disease. We... more Intradural metastasis of small cell lung carcinoma in conus medullaris is an uncommon disease. We report a case of lung cancer complicated with intradural metastasis in conus medullaris with just a symptom of hypoesthesia of the lower right limb and lower extremity weakness. The patient was initially suggested a clinical diagnosis of spinal meningioma or astrocytoma, according to the clinical symptom and the diseased region in imaging manifestation. Confirmed diagnosis was performed by histopathology and immunohistochemistry, revealing to be a malignant metastasis of small cell lung carcinoma. The patient underwent complete resection, and recovered well, although with pulmonary primary lesion to be treated. The tumor was 0.5×0.5×0.3cm in size and in contact with the conus medullaris. The aim of this study is to emphasize the importance of careful and comprehensive radiological examination and to reflect the difficulty of tumor resection. After the orthopedic surgery, the patient rec...
Angewandte Chemie (International ed. in English), Jan 12, 2018
Non-alternant, non-benzenoid π-conjugated polycyclic hydrocarbons (PHs) are expected to exhibit v... more Non-alternant, non-benzenoid π-conjugated polycyclic hydrocarbons (PHs) are expected to exhibit very different electronic properties from all-benzenoid PHs. Herein, we report the synthesis and physical properties of four derivatives (1a-b, 2a-b) of two azulene-fused s-indacene isomers, the diazuleno[2,1-a:2',1'-g]-s-indacene (DAI-1) and diazuleno[2,1-a:1',2'-h]-s-indacene (DAI-2). The backbone of both isomers contains 28 πe and is a 7-5-5-6-5-5-7 fused ring system. X-ray crystallographic analysis, NMR spectra, and theoretical calculations (ACID, NICS) reveal a structure with two aromatic azulene units fused with a central anti-aromatic s-indacene moiety. All compounds exhibit open-shell diradical character and are magnetically active, but the derivatives of DAI-2 show larger radical character than the respective ones of DAI-1. Their dications were isolated in crystalline form and all experimental and theoretical analysis disclose a shift of local (anti)aromaticity al...
We investigate the P‐wave velocity structure of the crust and upper mantle down to depth 400km be... more We investigate the P‐wave velocity structure of the crust and upper mantle down to depth 400km beneath the Ordos region and northeastern Qinghai‐Xizang plateau using the seismic tomographic technique. The data used are taken from the record by the regional network and a passive seismic observation profile across the investigated area, respectively. Our results show clear lateral variations of the crust and upper mantle velocity structure along the profile, which exist not only between different blocks, but also inside blocks. The average P‐wave velocity of the crust and upper mantle beneath the northeastern margin of the Qinghai‐Xizang plateau is lower, and that beneath the Ordos block is higher than the global model. Our observations are coincident with the tectonic activities of these two blocks. Between the northeastern Qinghai‐Xizang and Ordos block exists a transition zone about 200km wide, which on the surface corresponds to the region between Lanzhou and Haiyuan. This transit...
In our previous study, oxidized dextran/amino gelatin (ODex/MGel) self-crosslinking hydrogels hav... more In our previous study, oxidized dextran/amino gelatin (ODex/MGel) self-crosslinking hydrogels have been successfully prepared. Though their potential applications as in situ forming scaffolds for tissue engineering have been verified, the subcellular porosities of hydrogel networks which were induced by the intensity chemical crosslinking still pose a barrier for cells migration and proliferation within the hydrogels. The objective of this study was to develop an approach to accelerate cellular remodeling by preparing semi-interpenetrating networks (semi-IPNs) composed of ODex, MGel, and sodium hyaluronic (HA). Results showed that the addition of HA at the concentrations of 0.09% and 0.18% can greatly promote pre-osteoblast (MC3T3-E1) cells spreading throughout the ODex/MGel hydrogel networks. Therefore, these semi-IPNs hydrogels could be useful matrixes for cell transplantation in a variety of tissue engineering applications.
In view of tracking problems of hypersonic target in near space, such as large manoeuvring and di... more In view of tracking problems of hypersonic target in near space, such as large manoeuvring and difficulty to measure and so on, a new Sine tracking model based on characteristics analysis of gliding trajectory is proposed. Firstly, target of gliding trajectory has characteristics such as long distance, low energy costs and strong defending, and flight forces and motion are mainly analyzed, to reduce measure errors for model lost correlation. Then based on the full analysis of target hypersonic characteristics, non-periodic random, Sine model is built scientifically, to solve the problem that routine tracking model is only able to track low dynamic changing target. Finally, Sine model tracking on ECEF (Earth-centred Earth-fixed) coordinate is used to further improve on the hypersonic target tracking. Compared with other simulation models such as Singer and Jerk, Sine model will further improve the precision of locating and tracking.
Objectives: To investigate the relationship of the coated stents of mesenchymal stem cells (MSCs)... more Objectives: To investigate the relationship of the coated stents of mesenchymal stem cells (MSCs) and the restenosis after the operation of canine coronary artery stent implantation. Methods: The ethyl cellulose as the coating substrate was used to coat the stent and then the mesenchymal stem cells antibody. ② Build the canine coronary artery stenosis model by the balloon dilation. Implant the coated stents (n=20) with the coated antibody into the far end of the damaged segment of the coronary artery by applying the standard catheter-balloon technique. Then implant the bare stents (n=20) into the near end of the damaged segment. After 4 weeks, animals are sacrificed. Take out the stents and analyze the vascular cavity area and intimal area by the mean of intravascular ultrasound (IVUS) and vascular morphology inspection. Results: The minimum lumen diameter(MLD)and intimal area ( IA) of the mesenchymal stem cells coated stents group significantly decrease, comparing to the bare stents group (P0.05) and the minimum lumen area (MLA) significantly increases (P0.05). Conclusion: The coated stents of mesenchymal stem cells rapidly repair the damaged tunica intima and reduce the occurrence of the restenosis.
Advanced materials (Deerfield Beach, Fla.), Jan 12, 2016
Acceptor end-capping of oligomeric conjugated molecules is found to be an effective strategy for ... more Acceptor end-capping of oligomeric conjugated molecules is found to be an effective strategy for simultaneous spectra broadening, extinction coefficient enhancement, and energy level optimization, resulting in profoundly enhanced power conversion efficiencies (of 9.25% and 8.91%) compared to the original oligomers. This strategy is effective in overcoming the absorption disadvantage of oligomers and small molecules due to conjugation limitation.
An efficient scheme for photon statistics measurement is presented based on the Hanbury-Brown-Twi... more An efficient scheme for photon statistics measurement is presented based on the Hanbury-Brown-Twiss configuration. We set the sampling time Ts to satisfy the relationship of Ts < T d < Tm, where T d is the dead time of each detector and Tm is the laser pulse repetition period. And each single photon detector cannot detect more than one photon in each pulse. The approach can sufficiently eliminate the influences of the detector's dead time on photon statistics. At last, the photon statistics of coherent field is experimentally determined.
In this study, in terms of the nonlinear inversion method of receiver functions, we investigated ... more In this study, in terms of the nonlinear inversion method of receiver functions, we investigated the S-wave velocity structure of the crust and upper mantle beneath the capital circle region from teleseismic broadband waveform data recorded at 40 movable stations deployed over the Tangshan earthquake region in 2002~2003 by the Laboratory of Lithospheric Seismic Array, Institute of Geology, China Earthquake Administration and recorded at 33 permanent stations of the Digital Seismic Network in the Capital Circle. Based on these results, combining the S-wave velocity structures of the crust and upper mantle beneath 15 moveable broadband seismic stations over the Yanhuai basin by Liu et al. (1997), we present the S-wave velocity distribution along the profiles with different azimuths and horizontal distributions at different depths over the region of 39°～41°N and 114°~119.5°E. Our results show much higher spatial resolution than those given by the former studies by simultaneously using ...
International Conference on Neural Networks and Signal Processing, 2003. Proceedings of the 2003, 2003
This paper is devoted to the discussion of a new kind of sigma-delta modulator as signal expressi... more This paper is devoted to the discussion of a new kind of sigma-delta modulator as signal expression, by which the higher-bit input signal can be represented as a lower-bit digital signal. The quantized noise shaping and noise frequency spectrum are discussed and compared with the conventional sigma-delta modulator. The theoretic analysis shows that the new modulator is stable. A kind of DDC based on this modulator is designed and simulated.
Different species of sarcosaphagous insects are found on human corpses at different phases after ... more Different species of sarcosaphagous insects are found on human corpses at different phases after death, which is important for the estimation of postmortem interval (PMI) and other questions of forensic relevance. Calliphoridae are one of the earliest visitors to infest a corpse and lay their eggs, and develop maggots. Following the conventional method by morphology, a molecular method is a necessary assistance of species identification. This study has investigated the applicability of sequencing of mitochondrial DNA (mtDNA) based on a 250 base pair region of the gene for 16S rDNA to identify the forensically important species of Calliphoridae which were collected from 10 sites distributed at 9 provinces in China, including 25 specimens (8 species) in 3 genera of Calliphoridae family, including some specimens of Chrysomya megacephala (Fabricius), Chrysomya rufifacies (Macquart), Calliphora vicina (Robineau-Desvoidy), Lucilia caesar (Linnaeus), Lucilia porphyrina (Walker), Lucilia sericate (Meigen), Lucilia bazini (Seguy), Lucilia illustris (Meigen). The analysis of 16S rDNA sequences revealed abundant phylogenetically informative nucleotide substitutions that could identify Calliphoridae to species group. It renders the reliable identification of important sarcosaphagous insects in China, particularly in case of murder or suspicious death by providing an estimate of post-mortem interval (PMI) and scene of crime.
The newly developed Digital Seismic Network in Capital Circle consists of 107 stations, the seism... more The newly developed Digital Seismic Network in Capital Circle consists of 107 stations, the seismic monitoring and epicenter determination capabilities of which need to be verified. In epicenter determination, we should bring the superiority of digital seismic record into full play, and improve the reliability and precision of epicenter determination by using the corresponding digital processing technique. In this study, several digital processing techniques, including digital filtering, polarization analysis, station scanning and phase tracing, are used for improving the phase identification in the epicenter determination. Totally, 7 microearthquakes ( M L2.0) recorded by the Digital Seismic Networks in Capital Circle in 2000 were located precisely by using the Geiger method. In addition, the reliability and precision of the method and program have been verified by determining the epicenters of artificial events. It is shown that the error of epicenter location is less than 2.0km and the error of focal depth determination is less than 3.0km. The results of this study can be used for evaluating the seismic monitoring capability of the Digital Seismic Network in Capital Circle.
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