Energy harvesting that are able to operate in higher temperature gradients, and that can conduct electricity well without also conducting heat (something that was until recently thought impossible ), will result in increased efficiency. Future work in thermoelectrics could be to convert wasted heat, such as in automobile engine combustion, into electricity. This type of harvesting is based on the changing capacitance of vibration-dependent capacitors. Vibrations separate the plates of a charged variable capacitor, and mechanical energy is converted into electrical energy. Electrostatic energy harvesters need a polarization source to work and to convert mechanical energy from vibrations into electricity. The polarization
North University of China and Art 13. Software School 12. Graduate School 13. College of Continuing Education North University of China was authorized by the State Council to confer M.S. degree in 1981 and Ph.D. in 1998. At present, the university has the right to confer M.S. degrees in 20 disciplines, and Ph.D.s in 4 disciplines. The university has 8 provincial and ministerial key disciplines, including Mechanical Manufacturing and Its Automation, Mechatronic Engineering, Test & Measurement Technology and Instrumentation, Materials Processing Engineering, Applied Chemistry, Special Mechanical System and Its Application Engineering, Energy Materials Engineering, and Precision Instrument and Mechanism. Over the years, with conditions