Injection of water to enhance oil production is commonplace, and improvements in understanding the process are economically important. This study examines predictive models of the injection-to-production ratio. First...Injection of water to enhance oil production is commonplace, and improvements in understanding the process are economically important. This study examines predictive models of the injection-to-production ratio. Firstly, the error between the fitting and actual injection-production ratio is calculated with such methods as the injection-production ratio and water-oil ratio method, the material balance method, the multiple regression method, the gray theory GM (1,1) model and the back-propogation (BP) neural network method by computer applications in this paper. The relative average errors calculated are respectively 1.67%, 1.08%, 19.2%, 1.38% and 0.88%. Secondly, the reasons for the errors from different prediction methods are analyzed theoretically, indicating that the prediction precision of the BP neural network method is high, and that it has a better self-adaptability, so that it can reflect the internal relationship between the injection-production ratio and the influencing factors. Therefore, the BP neural network method is suitable to the prediction of injection-production ratio.展开更多
Successful selection principles and their application in China are discussed. In addition, the selection process of two Chinese Joint Ventures is reviewed. The paper emphasizes the importance of conducting structured ...Successful selection principles and their application in China are discussed. In addition, the selection process of two Chinese Joint Ventures is reviewed. The paper emphasizes the importance of conducting structured job relevant, behaviour or situation based interviews, with pre determined guideline answers and examples provided. The research showing the increased predictive validity of using this type of interview format is presented. The types of outcomes sought by Canadian employers and the attributes employees or agents should possess are provided. It is argued that these should serve as the basis for creating the interview format. The use of testing and reference checks is also discussed.展开更多
The conventional deadline and budget constrained （DBC） scheduling heuristics for economic-based computational grids does not take the inconsistency of grid heterogeneity into account, which can lead to decline of ap...The conventional deadline and budget constrained （DBC） scheduling heuristics for economic-based computational grids does not take the inconsistency of grid heterogeneity into account, which can lead to decline of application completion ratios. Motivated by this fact, a novel DI3C scheduling heuristics was proposed to deal with sequential workflow applications. In order to valuate the inconsistency, the relative cost （RC） metric was introduced, which was used to indicate the task-starving degree for resources. The new algorithm assigns tasks to resources, considering completion time, budget and RC together. The GridSim toolkit and the benchmark suites of the standard performance evaluation corporation （SPEC） were used to simulate the heterogeneous grid environment and applications. The experimental results show that the task and workflow completion ratios of the new heuristics are higher than those of the conventional heuristics.展开更多
Auditors of information systems technology （IT） play a major role in the prevention of significant fraud and investigation. Fraud is hard to detect and even more difficult to prevent. All the auditors are responsibl...Auditors of information systems technology （IT） play a major role in the prevention of significant fraud and investigation. Fraud is hard to detect and even more difficult to prevent. All the auditors are responsible for detection, determination of fraud and use of anti-fraud programs. With rapid developments in information, communication and technology, it is no surprise that companies grow and secure IT system, but with the development of technology was developed and fraud schemes. Detection or not the auditor of the fraud, not fulfilling his work reflects you, or not drafting of a plan audit standards and procedures, but he has to do with personal ability auditor, to analyze the findings during the audit, use of tests, the natural limitations of internal control and the fact that most of the findings of the auditor of nature are more persuasive than effective. When you conduct an audit, auditor has a professional skeptic attitude that considers the risk of circumvention of control procedures by management and recognizes that simple fact, the audit procedures that are effective in connection with the discovery of errors, are not suitable for detection and identification fraud. This requires from the auditor to establish a procedure for considering the risk of fraud, in order to detect the exact appearance not as a result of fraud. A particular impact has The Model of Fraud Detection Strategy, as an 8 steps model for identifying fraud, using IT to collect, define and analyze the data and anomalies that highlight indicators of fraud.展开更多
文摘Injection of water to enhance oil production is commonplace, and improvements in understanding the process are economically important. This study examines predictive models of the injection-to-production ratio. Firstly, the error between the fitting and actual injection-production ratio is calculated with such methods as the injection-production ratio and water-oil ratio method, the material balance method, the multiple regression method, the gray theory GM (1,1) model and the back-propogation (BP) neural network method by computer applications in this paper. The relative average errors calculated are respectively 1.67%, 1.08%, 19.2%, 1.38% and 0.88%. Secondly, the reasons for the errors from different prediction methods are analyzed theoretically, indicating that the prediction precision of the BP neural network method is high, and that it has a better self-adaptability, so that it can reflect the internal relationship between the injection-production ratio and the influencing factors. Therefore, the BP neural network method is suitable to the prediction of injection-production ratio.
文摘Successful selection principles and their application in China are discussed. In addition, the selection process of two Chinese Joint Ventures is reviewed. The paper emphasizes the importance of conducting structured job relevant, behaviour or situation based interviews, with pre determined guideline answers and examples provided. The research showing the increased predictive validity of using this type of interview format is presented. The types of outcomes sought by Canadian employers and the attributes employees or agents should possess are provided. It is argued that these should serve as the basis for creating the interview format. The use of testing and reference checks is also discussed.
基金Project(60873107) supported by the National Natural Science Foundation of China
文摘The conventional deadline and budget constrained （DBC） scheduling heuristics for economic-based computational grids does not take the inconsistency of grid heterogeneity into account, which can lead to decline of application completion ratios. Motivated by this fact, a novel DI3C scheduling heuristics was proposed to deal with sequential workflow applications. In order to valuate the inconsistency, the relative cost （RC） metric was introduced, which was used to indicate the task-starving degree for resources. The new algorithm assigns tasks to resources, considering completion time, budget and RC together. The GridSim toolkit and the benchmark suites of the standard performance evaluation corporation （SPEC） were used to simulate the heterogeneous grid environment and applications. The experimental results show that the task and workflow completion ratios of the new heuristics are higher than those of the conventional heuristics.
文摘Auditors of information systems technology （IT） play a major role in the prevention of significant fraud and investigation. Fraud is hard to detect and even more difficult to prevent. All the auditors are responsible for detection, determination of fraud and use of anti-fraud programs. With rapid developments in information, communication and technology, it is no surprise that companies grow and secure IT system, but with the development of technology was developed and fraud schemes. Detection or not the auditor of the fraud, not fulfilling his work reflects you, or not drafting of a plan audit standards and procedures, but he has to do with personal ability auditor, to analyze the findings during the audit, use of tests, the natural limitations of internal control and the fact that most of the findings of the auditor of nature are more persuasive than effective. When you conduct an audit, auditor has a professional skeptic attitude that considers the risk of circumvention of control procedures by management and recognizes that simple fact, the audit procedures that are effective in connection with the discovery of errors, are not suitable for detection and identification fraud. This requires from the auditor to establish a procedure for considering the risk of fraud, in order to detect the exact appearance not as a result of fraud. A particular impact has The Model of Fraud Detection Strategy, as an 8 steps model for identifying fraud, using IT to collect, define and analyze the data and anomalies that highlight indicators of fraud.
