We present the direct short pulse generation and spectrum broadening with ultra-high repetition rate fiber lasers that ensure the long-term stability of frequency combs.
ISBN:
(纸本)9781467364751
We present the direct short pulse generation and spectrum broadening with ultra-high repetition rate fiber lasers that ensure the long-term stability of frequency combs.
Aiming at the function disable Energy-saving hardware Trojan detection application requirements, has resarech the Energy-saving hardware Trojan generation principle and the trigger mechanism deeply, gives the function...
详细信息
Nowadays SIMD extensions became ubiquitous for computational platform, being widely used in signal processing, multimedia, and scientific applications. However, compilers still have difficult in vectorizing some appli...
详细信息
Nowadays SIMD extensions became ubiquitous for computational platform, being widely used in signal processing, multimedia, and scientific applications. However, compilers still have difficult in vectorizing some applications, such as computations on non-contiguous and especially interleaved data, and loop nest for which inner loops that carry all the dependencies and external loops with strided memory accesses. In order to solve these problems, we adopt Isomorphic statements Grouping (ISG) after extending group following UD and DU chains, which group isomorphic computation statements that perform the same operation. And correspondingly, we generate vector permutation instructions according to the target ISA SIMD instructions at the SIMD code generation phase. This approach has been implemented in a compiler based on Open64 which translate C source program to C source program with SIMD intrinsic functions. Experiments with this compiler show that ISG Super Level Parallelism(ISG-SLP) can be used to compile a number of real-world kernels, achieving up to 3.11 speedup.
After being pumped from the 5s_(1/2) ground state to the 6p_(1/2) state,the population inversion between 6s_(1/2) and 5p_(1/2,3/2) can be established for a rubidium four-level active optical *** calculate the ac Stark...
详细信息
After being pumped from the 5s_(1/2) ground state to the 6p_(1/2) state,the population inversion between 6s_(1/2) and 5p_(1/2,3/2) can be established for a rubidium four-level active optical *** calculate the ac Stark shift due to lattice trapping laser which dominates the frequency shift of clock transition in a lattice trapped rubidium four-level active optical *** magic wavelengths are found,which can form desired optical lattice trapping *** choosing a proper intensity and linewidth of the trapping laser,the fractional frequency uncertainty of clock transition due to the ac Stark shift of the trapping laser,is estimated to be below 10^(−18).
The hydraulic excavator energy-saving research mainly embodies the following three measures： to improve the performance of diesel engine and hydraulic component, to improve the hydraulic system, and to improve the po...
详细信息
The hydraulic excavator energy-saving research mainly embodies the following three measures： to improve the performance of diesel engine and hydraulic component, to improve the hydraulic system, and to improve the power matching of diesel-hydraulic system-actuator. Although the above measures have certain energy-saving effect, but because the hydraulic excavator load changes frequently and fluctuates dramatically, so the diesel engine often works in high-speed and light load condition, and the fuel consumption is higher. Therefore, in order to improve the economy of diesel engine in light load, and reduce the fuel consumption of hydraulic excavator, energy management concept is proposed based on diesel engine cylinder deactivation technology. By comparing the universal characteristic under diesel normal and deactivated cylinder condition, the mechanism that fuel consumption can be reduced significantly by adopting cylinder deactivation technology under part of loads condition can be clarified. The simulation models for hydraulic system and diesel engine are established by using AMESim software, and fuel combustion consumption by using cylinder-deactivation-technology is studied through digital simulation approach. In this way, the zone of cylinder deactivation is specified. The testing system for the excavator with this technology is set up based on simulated results, and the results show that the diesel engine can still work at high efficiency with part of loads after adopting this technology; fuel consumption is dropped down to 11% and 13% under economic and heavy-load mode respectively under the condition of driving requirements. The research provides references to the energy-saving study of the hydraulic excavators.
Polymer photovoltaic(PV)cells based on UV-ozone(UVO)-treated indium vanadium oxide(IVO)anodes are *** performance of cells with UVO-treated IVO film anodes without interfacial layers was significantly improved compare...
详细信息
Polymer photovoltaic(PV)cells based on UV-ozone(UVO)-treated indium vanadium oxide(IVO)anodes are *** performance of cells with UVO-treated IVO film anodes without interfacial layers was significantly improved compared with those containing untreated IVO *** origin of the enhancement is investigated by atomic force microscopy and photoelectron spectroscopy *** results demonstrate that UVO treatment can smooth the IVO surface,and increase the work function of IVO films due to the removal of carbon contamination and a dipole resulting from a surface rich in negatively charged ***-treated IVO films are potential electrode materials for polymer PV cells.
The front cover artwork is provided by Prof. Dr. Yu Chen and his co-workers. The image represents how deliberately designed, solution-processable, and electroactive polymer-functionalized graphene-oxide nanosheets can...
The front cover artwork is provided by Prof. Dr. Yu Chen and his co-workers. The image represents how deliberately designed, solution-processable, and electroactive polymer-functionalized graphene-oxide nanosheets can be reversibly switched ON and OFF for the development of next-generation nonvolatile information-storage applications. Read the full text of the article at 10.1002/celc.201300158 .
In this paper, an analytical model of sandwich type piezoelectric transducer using bending vibration mode is presented. The piezoelectric transducer is simplified as a constant cross section composite beam with free-f...
详细信息
暂无评论