Oil revenue and production cost disconnect and its impact on the environment:Economic globalization in Asia-Pacific economic cooperation countries

The global economy relies heavily on oil production,but it is not without challenges.During the period of economic globalization,the revenue and costs associated with oil production have become disjointed,which has had a detrimental effect on the environment.As a result,environmental protection has been compromised,environmental regulations have been weakened,natural resources have been exploited,and climate change has been exacerbated.This study examines the impact of revenue minus the production cost of oil,energy use,and shadow economy on environmental degradation in APEC countries from 1991 to 2020,using the economic globalization index as a moderating variable.The result explains that revenue minus the oil production cost and the shadow economy are negatively associated with environmental degradation.Energy use and economic globalization are positively associated with environmental degradation in APEC countries.Revenue minus the production cost of oil and shadow economy improve the environment.Energy use and economic globalization degrade the environment in APEC countries.Policymakers are encouraged to advance technologies and upgrade infrastructure to reduce greenhouse gas emissions;also,promoting energy-efficient practices in other sectors,like transportation and manufacturing,could contribute to a healthier environment.

Investigation on Savonius turbine technology as harvesting instrument of non-fossil energy: Technical development and potential implementation

Environmental risk due to excessive residual emission is rising. Greenhouse effect, ice melting in the Arctic, reduction of air quality are several concerns which need immediate development and change. Energy harvesting equipment is one of the key solutions. Environment potential, e.g. water resource can be collaborated with mechanical equipment to harvest clean energy. Savonius turbine has been proposed and studied for this purpose and can be placed on several energy resources, i.e. water and wind. Still, real-world implementation of this technology is lacking,especially in tropical archipelago countries which have abundant water resources. In this work,assessment of Savonius turbine technology as instrument to harvest clean energy is conducted. A series of development on the turbine performance and technical modification is considered as reference to implement the technology in water and open air environments. It is noted that rotor design, operation depth and nozzle attachment are several key influencing factors.

Optimal Rate Allocation Based on Cross-Layer Design and End-to-End Congestion Control in WCDMA Networks

In this paper, a novel idea for rate allocation combining both vertical coupling and horizontal coupling constraints is proposed, and a unified utility function to balance two paradoxical issues: efficiency and fairness, revenue and cost is elaborated in WCDMA networks. Then, the optimal rate allocation problem is formulated as a network utility maximization(NUM) model based on cross-layer design and end-to-end congestion control, aiming at exploring the impacts of wired networks and the characteristics of radio access networks(RANs) on rate allocation. Furthermore, a distributed algorithm is derived, which can effectively match load states between RANs and wired networks, followed by a detailed illustration of the practical implementations. Numerical results demonstrate a signifi cant performance improvement in the end-to-end throughput.

Profitable credit card business empirical analysis of factors

Since 1995, major domestic commercial banks are beginning to have a variety of credit cards issued. However, at present, China＇s relatively low profitability of the credit card business, it accounts for a smaller proportion of total bank income. By means of credit card revenue／cost structure analysis, the authors found spending and overdraft balances affecting credit card business, an important factor in profitability. At the same time, combined with a commercial bank＇s existing statistical data, using SPSS software correlation and regression analysis, the authors found that the key to improve the bank card revenue is to raise China＇s commercial banks, credit card revolving credit utilization, and expand the scale of overdraft balances.

Speeding Up Corporate Cost Cuts

According to recent figures from the National Bureau of Statistics,in October,the consumer price index,which gauges the overall cost of living,grew 2.1 percent in China,which was 0.2 percentage points higher than that in September.Furthermore,the producer price index,

Metcalfe＇s Law and Network Quality： An Extension of Zhang et al.

Zhang et al. exploited data on Facebook and Tencent to validate Metcalfe＇s law, which states that the aggregate value of a communications network is proportional to the square of the number of users. This note points out that the value of a social network may be driven not only by its size, but also by increases in the variety and quality of the services offered. I therefore extend Zhang et al.＇s approach by explicitly controlling for changes in network quality over time. For the case of Tencent, I also filter out revenues and costs that are unrelated to Tencent＇s core （social network） services. I find that these two extensions only strengthen Zhang et al.＇s conclusions： Metcalfe＇s law now outperforms the other laws even more clearlv.

A new algorithm based on the proximity principle for the virtual network embedding problem

The virtual network embedding/mapping problem is a core issue of network virtualization. It is concerned mainly with how to map virtual network requests to the substrate network efficiently. There are two steps in this problem: node mapping and link mapping. Current studies mainly focus on developing heuristic algorithms, since both steps are computationally intractable. In this paper, we propose a new algorithm based on the proximity principle, which considers the distance factor besides the capacity factor in the node mapping step. Thus, the two steps of the embedding problem can be better integrated and the substrate network resource can be used more efficiently. Simulation results show that the new algorithm greatly enhances the performance of the revenue/cost (R/C) ratio, acceptance ratio, and runtime of the embedding problem.

Superiority:China Mobile in the competition

The market share between China Mobile and China Unicom has stabilized since 2002. It is found that China Mobile has the superiority in the competition, for example, the scissors movement between its revenue and cost indicates that it has a strong profit generating ability and there is enough room for it to reduce the price. The ratio between its price （marginal income） and marginal cost indicates that there is a very distant limit for it to reduce the price. Its demand is obviously flexible with the price, but it does not use the price weapon abundantly. The reason for the stabilization of the market is that China Mobile withdrew from the competition.