The existence and uniqueness of solutions to backward stochastic differential equations with jumps and with unbounded stopping time as terminal under the non_Lipschitz condition are obtained. The convergence of soluti...The existence and uniqueness of solutions to backward stochastic differential equations with jumps and with unbounded stopping time as terminal under the non_Lipschitz condition are obtained. The convergence of solutions and the continuous dependence of solutions on parameters are also derived. Then the probabilistic interpretation of solutions to some kinds of quasi_linear elliptic type integro_differential equations is obtained.展开更多
The skip-stop operation strategy （SOS） is rarely applied to Chinese urban rail transit networks because it is a simple scheme and a less universally popular transportation service. However, the SOS has performance a...The skip-stop operation strategy （SOS） is rarely applied to Chinese urban rail transit networks because it is a simple scheme and a less universally popular transportation service. However, the SOS has performance advantages, in that the total trip time can be reduced depending on the number of skipped stations, crowds of passengers can be rapidly evacuated at congested stations in peak periods, and the cost to transit companies is reduced. There is a contradiction between reducing the trip time under the SOS and increasing the passengers＇ waiting times under an all-stop scheme. Given this situation, the three objectives of our study were to minimize the waiting and trip times of all passengers and the travel times of trains. A comprehensive estimation model is presented for the SOS. The mechanism through which the trip time for all passengers is affected by the SOS is analyzed in detail. A 0-I integer programming formulation is established for the three objectives, and is solved using a tabu search algorithm. Finally, an example is presented to demonstrate that the estimation method for the SOS is capable of optimizing the timetable and operation schemes for a Chinese urban rail transit network.展开更多
Better seaport operation is one of the indicators that a city is achieving its goals towards progress and development. The Sta. Ana Davao Port for example is one of the many seaports in Region XI that caters to thousa...Better seaport operation is one of the indicators that a city is achieving its goals towards progress and development. The Sta. Ana Davao Port for example is one of the many seaports in Region XI that caters to thousands of passengers going from one terminal to another and from one island to another. In this study, it will revisit the status of Sta. Davao Port from the time when it was devolved from the national goverrmaent under Philippine Ports Authority （PPA） to local government of Davao City. The devolution was in accordance with the Memorandum of Agreement by two parties, which clearly stipulates the full-control of operation of the local government of Davao City with an end view of bringing more investors, tourist hubs and other business related concerns. This study utilized descriptive-evaluative method using interview guide question as a qualitative approach in gathering data. The participants were the former employees of the PPA and the current management of Sta. Ana Davao Port under the local government. Data gathered were analyzed using Nvivo software for qualitative research and content analysis to obtain factual information direct from the participants. It was found out that most of the employees agreed that the office needs improvement in terms of physical, financial and human aspects. For several years, the passengers of both local and foreign shipping lines were complaining on its limited berthing capacities, saturated container yards and even worse the collapse of the berthing area which resulted to the delay of transactions in the operation of the vessels. In spite of employees claimed that prior to devolution of Sta. Ana Davao Port to the local government of Davao City, the operation was well-managed and maintained, thereby resulted to passengers＇ satisfaction. Thus, the researchers aimed to provide an action plan as basis by the management of the Sta. Davao Port to achieve its vision, missions and goals.展开更多
A new technique for the conversion of ladder based filter into CFOA based filter has been proposed. The technique uses signal flow graph and converts the existing LC ladder based filter into band pass & band stop ...A new technique for the conversion of ladder based filter into CFOA based filter has been proposed. The technique uses signal flow graph and converts the existing LC ladder based filter into band pass & band stop configurations. The design of band pass and band stop filter has been realized using the proposed technique. The proposed configuration is implemented using CFOA as an active device and all the capacitors are grounded. CFOA based circuits have greater linearity, high dynamic rate, high slew rate and high signal bandwidth. Simulation has been carried out using simulation software P Spice (v10.1). The simulation results have been demonstrated and discussed.展开更多
文摘The existence and uniqueness of solutions to backward stochastic differential equations with jumps and with unbounded stopping time as terminal under the non_Lipschitz condition are obtained. The convergence of solutions and the continuous dependence of solutions on parameters are also derived. Then the probabilistic interpretation of solutions to some kinds of quasi_linear elliptic type integro_differential equations is obtained.
基金financed by the National Basic Research Program of China, under project ID 2012CB725403
文摘The skip-stop operation strategy （SOS） is rarely applied to Chinese urban rail transit networks because it is a simple scheme and a less universally popular transportation service. However, the SOS has performance advantages, in that the total trip time can be reduced depending on the number of skipped stations, crowds of passengers can be rapidly evacuated at congested stations in peak periods, and the cost to transit companies is reduced. There is a contradiction between reducing the trip time under the SOS and increasing the passengers＇ waiting times under an all-stop scheme. Given this situation, the three objectives of our study were to minimize the waiting and trip times of all passengers and the travel times of trains. A comprehensive estimation model is presented for the SOS. The mechanism through which the trip time for all passengers is affected by the SOS is analyzed in detail. A 0-I integer programming formulation is established for the three objectives, and is solved using a tabu search algorithm. Finally, an example is presented to demonstrate that the estimation method for the SOS is capable of optimizing the timetable and operation schemes for a Chinese urban rail transit network.
文摘Better seaport operation is one of the indicators that a city is achieving its goals towards progress and development. The Sta. Ana Davao Port for example is one of the many seaports in Region XI that caters to thousands of passengers going from one terminal to another and from one island to another. In this study, it will revisit the status of Sta. Davao Port from the time when it was devolved from the national goverrmaent under Philippine Ports Authority （PPA） to local government of Davao City. The devolution was in accordance with the Memorandum of Agreement by two parties, which clearly stipulates the full-control of operation of the local government of Davao City with an end view of bringing more investors, tourist hubs and other business related concerns. This study utilized descriptive-evaluative method using interview guide question as a qualitative approach in gathering data. The participants were the former employees of the PPA and the current management of Sta. Ana Davao Port under the local government. Data gathered were analyzed using Nvivo software for qualitative research and content analysis to obtain factual information direct from the participants. It was found out that most of the employees agreed that the office needs improvement in terms of physical, financial and human aspects. For several years, the passengers of both local and foreign shipping lines were complaining on its limited berthing capacities, saturated container yards and even worse the collapse of the berthing area which resulted to the delay of transactions in the operation of the vessels. In spite of employees claimed that prior to devolution of Sta. Ana Davao Port to the local government of Davao City, the operation was well-managed and maintained, thereby resulted to passengers＇ satisfaction. Thus, the researchers aimed to provide an action plan as basis by the management of the Sta. Davao Port to achieve its vision, missions and goals.
文摘A new technique for the conversion of ladder based filter into CFOA based filter has been proposed. The technique uses signal flow graph and converts the existing LC ladder based filter into band pass & band stop configurations. The design of band pass and band stop filter has been realized using the proposed technique. The proposed configuration is implemented using CFOA as an active device and all the capacitors are grounded. CFOA based circuits have greater linearity, high dynamic rate, high slew rate and high signal bandwidth. Simulation has been carried out using simulation software P Spice (v10.1). The simulation results have been demonstrated and discussed.
