Solitons are self-sustaining particle-like wave packets found throughout nature. Optical systems such as optical fibers and mode-locked lasers relatively simple, technologically important, continue to play a major role in our understanding of the rich nonlinear dynamics solitons. Here we present theoretical experimental observations new class soliton characterized by pulses with large positive chirp normal dispersion resonators strong spectral filtering. Numerical simulations reveal several...

Kerr resonators support novel nonlinear wave phenomena including technologically important optical solitons. Fiber resonator solitons enable wavelength and repetition-rate versatile femtosecond-pulse frequency-comb generation. However, key performance parameters, such as pulse duration, lag behind those from traditional mode-locked laser-based sources. Here we present new generation in dispersion-managed based on stretched-pulse solitons, which the shortest pulses to date a fiber resonator....

High utility sequential patterns (HUSP) refer to those with high (such as profit), which play a crucial role in many real-life applications. Relevant studies of HUSP only consider positive values sequence utility. In some applications, however, consists items negative (NIV). For example, supermarket sells cartridge profit package printer at higher return. Although few methods have been proposed mine itemsets (HUI) NIV, they are not suitable for mining NIV because an item may occur more than...

Optical Kerr resonators support a variety of stable nonlinear phenomena in simple and compact design. The generation ultrashort pulses frequency combs has been shown to benefit several applications, including spectroscopy telecommunications. most common anomalous dispersion can be accurately described by well-studied mean-field Lugiato-Lefever equation (LLE). Recently observed highly chirped normal with spectral filter, however, cannot. Here we examine the LLE regime modified Gaussian filter...

The aim of this study is to design and evaluate a simple free running Analog-Digital Converter (ADC) based on the Field Programmable Gate Array (FPGA) device accomplish energy position readout silicon photomultiplier (SiPM) array for application as PET scanners. This FPGA-ADC carry chain Time-Digital (TDC) implemented Kintex-7 FPGA consists only one off-chip resistor so it has greater advantages in improving system integration reducing cost than commercial chips. In paper, front-end...

Conductive atomic force microscopy (C-AFM) has been widely used to map the nanoscale electrical properties of conducting polymers, nanomaterials, and organic electronic devices. While these measurements provide valuable insight into spatial dependence performance, reported current densities conductivities measured by C-AFM are consistently much higher than those at macroscopic scale. Here, we demonstrate that anomalously high arise from ignoring spreading hence underestimating...

With the continuous progress and development of die industry, traditional processing has been unable to meet current needs society in quality quantity production. Therefore, manufacturing industry improved its technology, then high speed machining technology for dies emerges as times require. The paper summarizes elaborations characteristics modern advantages cutting die, key technologies are also introduced. Thus illustrates that is an important direction processing.

Fiber Kerr resonators are simple driven with desirable wavelength and repetition rate flexibility for generating ultrashort pulses applications including telecommunications, biomedicine, materials processing. However, fiber to date often generate longer require more complicated techniques single than would be applications. Here we address these limits by demonstrating robust single-pulse performance supporting 120-fs pulse durations in based on stretched-pulse solitons. Through matching...

We encountered many obstacles in the implementation process of Activity-based Costing. But new accounting standards fully embody a concept, coinciding with concept Costing, and it brings opportunity to implement The paper discusses content.

Infrequent itemsets are very important because many valued information can be mined from them. 2L-XMMMS model, which has been mentioned in previous studies, mine infrequent and frequent by assigning two different minimum supports to every item. But it is based on Apriori algorithm its efficiency not high. To improve efficiency, we use the FP-Growth instead of achieve 2L-XMMS model propose an efficient 2LMS_FP. Experimental results show that 2LMS_FP tens thousands faster than 2L-XMMS.

In this paper, we conducted the research on RFID technology in application of parking management system. The system adopts scheme combined with background software, whose foreground uses Visual basic 6.0 to carry procedure development, and carries data administration work access database. It collects ID information by module, then computer software charge fees even though vehicles do not stop. that way achieves automation charge. addition, paper has also introduced hardware components,...

According to the demand of present agricultural environment on-line monitoring, a design scheme based on Nx5883 wireless remote control terminal is proposed for monitoring system. The system consists background detection server and terminal; it can real-timely monitor variables such as temperature, humidity sunlight which influence crop growth. Firstly framework given, secondly hardware designed. Whats more, function application work process given. Because using data transmission, solved...

For requirements Permanent magnet synchronous motor (PMSM) speeds control, the digital signal processor (DSP) is used for speed control system of PMSM. By using space vector pulse width modulation (SVPWM) algorithm, performance improved, and costs are reduced. In this paper, principle SVPWM analyzed, its implementation described. Through analysis permanent in a different coordinate mathematical model solution presented, software design A DSP-based PMSM build, analyzed MATLAB simulation. That...

In recent years, Automatic Guided Vehicle (AGV), as a mobile robot, has been developed rapidly, especially with the rapid development of sensor technology, navigational technology widely used in field automatic guided vehicle. Meanwhile, guidance mode broken through single way track-laying and is developing towards diversified direction. This paper elaborated operating principle advantages several commonly ways guiding, put forward guiding which combined laser electromagnetic site positioning.

With the development of wireless communication technology and mechanical technology, combination application two technologies to agricultural production has become inevitable trend development. Using Nx5883 remote control terminal, a greenhouse environment monitoring system based on GPRS been designed. It introduces composition hardware working process system. The can monitor change temperature humidity in soil, soil’s PH, illumination timely. transmits signals dates data terminal though...