企业标志性科研仪器设备利用与评价研究

科研仪器设备的作用发挥和利用效率受到国家和业界高度重视,国家部委、地方政府、高校及企业都对科研仪器设备的购置、利用、评价制定了相应的管理办法和制度。参照国家重大科研基础设施和大型科研仪器开放共享评价考核要求,统计分析了中国石油的重点实验室和试验基地两类科研条件平台拥有的科研仪器设备利用情况,提出了标志性科研仪器设备应符合企业特点,满足专有、价值高、水平先进、特色试验和试验功能等方面需求;重点针对215台(套)标志性科研仪器设备提出了相应的评价方法和指标,并开展试评价;结合企业标志性科研仪器设备管理存在的问题,提出科研仪器设备在购置、使用、共享、运行费用支持等方面的建议,为公司科技管理部门提供决策参考。

Analysis of response time probability distribution of workflows

An evaluation approach for the response time probability distribution of workflows based on the fluid stochastic Petri net formalism is presented. Firstly, some problems about stochastic workflow net modeling are discussed. Then how to convert a stochastic workflow net model into a fluid stochastic Petri net model is described. The response time distribution can be obtained directly upon the transient state solution of the fluid stochastic Petri net model. In the proposed approach, there are not any restrictions on the structure of workflow models, and the processing times of workflow tasks can be modeled by using arbitrary probability distributions. Large workflow models can be efficiently tackled by recursively using a net reduction technique.

The Constitution and Working Mechanism of the Fast Fashion Enterprise Financial Competitiveness

With the Pearson Correlation Coefficient measurement method, this paper studies the correlation between the various elements influencing the financial competitiveness of the fast fashion enterprieses and the long-term financial stability, which shows that the financial resilience has the biggest correlation with the long-term financial stability, which is followed in sequence by financial management capacity, financial resources capacity, financial performance capacity, and financial activity capacity. This is due to the fact that such factors as financial solvency, financial operations, profitability, growth capacity and the ability to generate cash exert effect upon the long-term stability of the financial competitiveness.

A Study of Truck Parking Facilities＇ Adequacy in Brazilian Federal Highways

According to Brazilian reports of large trucks accidents on Federal Highway, fatigue and speeding are the major contributors to those accidents in which drivers are trying to meet short delivery deadlines for long hauls. A new federal law has been approved to limit truck drivers＇ working times, including maximum continuous driving time and maximum daily and weekly on-duty time. We present a study that aims at analyzing whether the existing resting areas on federal highways have sufficient capacity to meet current and future demand for truck stops. We have established the following method： In the first step, we review and study different models found in the literature and evaluate their potential application to Brazilian conditions; In the next step, we develop our own model and, finally, validate it using data from BR-101 Federal Highway, in Santa Catarina State. Tests made using part of collected data （which were subjected to statistical treatment） showed satisfactory results, indicating that the demand behavior was consistent with that observed in the field and the answers provided by truck drivers in the interviews. The research has yet to complete processing all data and it also must be repeated in other regions with different characteristics.

Genetic Algorithm for Scheduling Reentrant Jobs on Parallel Machines with a Remote Server

This paper considers a reentrant scheduling problem on parallel primary machines with a remote server machine, which is required to carry out the setup operation. In this problem, each job has three operations. The first and last operations are performed by the same primary machine, implying the reentrance, and the second operation is processed on the single server machine. The order of jobs is predetermined in our context. The challenge is to assign jobs to the primary machines to minimize the makespan. We develop a genetic algorithm(GA) to solve this problem. Based on a simple strategy of assigning jobs in batches on the parallel primary machines, the standardized random key vector representation is employed to split the jobs into batches. Comparisons among the proposed algorithm, the branch and bound(BB) algorithm and the heuristic algorithm, coordinated scheduling(CS), which is only one heuristic algorithm to solve this problem in the literature, are made on the benchmark data. The computational experiments show that the proposed genetic algorithm outperforms the heuristic CS and the maximum relative improvement rate in the makespan is 1.66%.

Main Content and Enlightenment of Western state retirement system

The retirement age policy adjustment is again sharing the cost of the aging process, incentives to delay retirement life expectancy means that workers work longer. Developed by the elastic mechanism into retirement system framework, improve the flexibility of the retirement system, in curbing early retirement incentives to delay retirement, improve the elderly labor force participation rate, and achieved some success. The reform of the retirement system gradually into public view. To adapt to China＇s national conditions for the establishment of flexible retirement mechanism, western countries need to discuss flexible retirement system, in-depth analysis of the establishment of the special constraints flexible retirement mechanism, good theoretical advance preparation for retirement Mechanism.