Wireless sensor networks (WSNs) which is proposed in the late 1990s have received unprecedented attention, because of their exciting potential applications in military, industrial, and civilian areas (e.g., environmental and habitat monitoring). Although WSNs have become more and more prospective in human life with the development of hardware and communication technologies, there are some natural limitations of WSNs (e.g., network connectivity, network lifetime) due to the static network style in WSNs. Moreover, more and more application scenarios require the sensors in WSNs to be mobile rather than static so as to make traditional applications in WSNs become smarter and enable some new applications. All this induce the mobile wireless sensor networks (MWSNs) which can greatly promote the development and application of WSNs. However, to the best of our knowledge, there is not a comprehensive survey about the communication and data management issues in MWSNs. In this paper,focusing on researching the communication issues and data management issues in MWSNs, we discuss different research methods regarding communication and data management in MWSNs and propose some further open research areas in MWSNs.Copyright © 2011 John Wiley & Sons, Ltd.

By sharing rows and columns, the 2-D networked resistive sensor arrays simplified the interconnect complexity but suffered from the crosstalk problem among its elements. The crosstalk was mainly affected by the multiplexers' resistor, adjacent column elements, adjacent row elements, and array size. First, we designed an improved isolated drive feedback circuit (IIDFC) using one operational amplifier to reduce the crosstalk caused by the adjacent column elements in the 2-D networked resistive sensor array. Then, a mathematical equivalent resistance expression of the element being tested (EBT) for this circuit was analytically derived. Then, the IIDFC and its equivalent resistance expression of the EBT were evaluated by the simulations. The simulation results show that the IIDFC can greatly reduce the crosstalk error caused by the adjacent column elements in the 2-D networked resistive sensor array with the row-column fashion and its resistance expression of the EBT can be used as a general formula to evaluate the performance of the IIDFC.Index Terms-Resistive sensor array, measurement error, improved isolated drive feedback circuit (IIDFC), isolated drive feedback circuit (IDFC).

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Last few decades, several economic uncertainty challenges have emerged in the energy market. This study newly contributes to existing research by inspecting the asymmetric effect of economic policy uncertainty and financial development on renewable energy consumption in China. We employ a nonlinear ARDL approach by using a time-series dataset spanning from 1990 to 2019. Our symmetric model shows that economic policy uncertainty matters in the short run, as it increases renewable energy consumption while exhibiting a negative impact on renewable energy in long run in China. Our asymmetric results in the short and long run have deviated from the symmetric results. Our asymmetric results of the short and long run are similar in direction but different in magnitude. The results show that positive change in economic policy uncertainty has increased 3.216% and negative change in economic policy uncertainty has decreased 1.461% in renewable energy consumption in long run in China. Financial development does not matter in renewable energy consumption in China. Based on these outcomes, we can draw some robust economic policies in China as well as for other pollutant economies. Policymakers should be made economic policies more predictable in the modern era.

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