Reducing the network energy consumption and increasing the lifetime of network are important content for wireless sensor network. LEACH is an adaptive routing algorithm with low consumption for wireless sensor network. However there are many shortcomings in LEACH routing algorithm such as too much energy consumption of cluster heads and uneven clustering each round. This paper puts forward a new improved algorithm named H-LEACH to solve the problem above. It lets the nodes holding more energy have the high possibility to become cluster-heads through a threshold and constraints the number of clusters each round at the same time so that it can balance the energy distribution and reduce energy cost. Simulation results show that H-LEACH is more energy-efficient than LEACH protocol.

It is especially important to save energy and prolong the network lifetime because the WSN nodes energy is limited. Optimizing the routing algorithm for WSN is one of the important ways to reduce energy consumption. LEACH routing protocol is the first cluster-based routing protocol for wireless sensor networks. But LEACH have some deficiencies, such as agreement of uneven clustering, the nodes energy imbalance, frequent clustering and consume too much energy. The paper proposes an improved LEACH protocol to solve the above problem. It takes the residual energy of the nodes into account when nodes selected the cluster-head so that the nodes that hold high-energy have the high possibility to be selected as cluster-head. The improved algorithm uses the incomplete clustering which does not need to cluster every round but interval cluster. Simulation results show that the improved LEACH protocol effectively increases the nodes energy utilization and extends the network lifetime.

With the improvement of living standards, people's demands for culture are increasingly high. Based on the research of Android platform and Cloud computing technology, it builds a Cultural Compound system based on Android platform in this paper. It utilizes Cloud computing technology to build a network management unit, uses AMAP to provide the users location information. It can provide users to search the surrounding nine different kinds of cultural venues. Meanwhile, it has a lot of features. Especially, cultural venues can push their information to the users through this system. This system can allow people more convenient to get cultural information through mobile phone at any time and at any place to meet peoples spiritual needs.

With the rapid growth of China's economy, and the gradually improvement of the people's living standard, the car has become an indispensable means of transportation in our lives, and its number is increasing. So, the demand for the quality and scale is also growing. In order to meet the needs of daily parking management, this paper designed a kind of efficient embedded parking lot management system based on RFID. The system takes the Micro2440 embedded development board as the hardware platform and the Linux operating system as the software platform. It can gather vehicle information from RFID electronic tag cyclically to control the switch of the gate and broadcast the received information. After running and testing, the system has completed the initial design goals stable, and the operation is very. It has a certain application value.

This paper reports a readout system for a piezoresistive accelerometer which is fabricated by LTCC thick-film process technology. The authors first introduce a LTCC compatible design of this new kind of accelerometer, which is based on piezoresistive phenomenon. As the performance of the accelerometer circuitry is affected by temperature, a readout system is introduced for compensating the temperature drift and the non-linearity of this piezoresistive accelerometer by using the MAX1452 processor. The authors give the principles of the temperature compensation and the executive processes. The readout system also includes a ZigBee wireless transmission system and a real-time curve display window. Some tests on the system are carried out and the results manifest that the readout system designed in this paper is workable.