What factors are most significant in understanding adoption behavior for energy efficiency technologies by commercial, residential, and industrial customers? The case of energy efficient lighting technologies is specifically examined. Several types of lighting technologies are compared to indoor LED lighting to determine how the technology meets the needs the various user types. What factors are most significant in motivating technology adoption for such technologies, and preventing subsequent technology disadoption? This is particularly important for energy efficient lighting technologies, as both technology adoption and technology disadoption can be extremely rapid, and ongoing user involvement is often required to recognize full benefits from these technologies. The Unified Theory of Acceptance and Use of Technology (UTAUT) is useful in explaining adoption behavior related to stakeholder expectation and buy-in for the new technologies. UTAUT contains four elements that can be adapted to fit this research: (1) Performance Expectancy; (2) Effort Expectancy; (3) Social Influences; and (4) Facilitating Conditions. In the case of energy efficient lighting adoption, and LED adoption in particular, performance expectancy and effort expectancy can be related to factors such as future energy price expectancies, actual savings results, and ease of energy savings. Factors involving social influences include perceptions of environmental friendliness among different user groups, and facilitating conditions include policies, incentives, and educational programs to encourage adoption. Some conclusions are then drawn regarding adoption factors for emerging energy efficient lighting technologies.

http://ieeexplore.ieee.org/iel5/6008221/6017605/06017904.pdf

Understanding adoption of energy efficiency technologies: Applying behavioral theories of technology acceptance & use to understand the case of led lighting for commercial, residential, and industrial end-users

The utility model provides a multi-output constant-current driving circuit of a light-emitting diode. The circuit comprises a constant-current source and at least two load branch circuits, wherein at least one load branch circuit serves as a reference branch circuit and the other load branch circuits or part of the other load branch circuits serve as regulating branch circuits; a current sampling module is arranged for each reference branch circuit; a current regulating module and a current regulating control module are arranged for each regulating branch circuit; and the current regulating control module is used for receiving a current sampling signal of the current sampling module of each reference branch circuit connected with the current regulating control module as a first signal, receiving the current sampling signals of the current regulating modules of the regulating branch circuits as second signals, controlling the impedance of the current regulating module of the regulating branch circuits which are connected with the current regulating control module, and regulating the current of the regulating branch circuits connected with the current regulating control module. The circuit provided by the utility model has the advantages of simple structure and lower cost.

Multi-output, constant current driving circuit for light emitting diode

The invention relates to a high-power factor LED (light-emitting diode) driving circuit supporting silicon controlled rectifier dimming. A replacement type low-power LED driver implemented by the invention is an electrical isolation type circuit, the circuit adopts a flyback conversion topological structure, an isolation type transformer is used for performing energy storage and transmission, and an external three-end silicon controlled rectifier dimmer is used for dimming. In order to realize a dimming function, the use of a switching power supply management chip NXPSSL2101T integrating an MOSFET (metal oxide semiconductor field-effect transistor), the use of a three-end silicon controlled rectifier dimming switch for producing input signals, the use of a resistor voltage division way for producing brightness control signals and the like are considered. In order to realize a high power factor, the use of a valley-fill PFC (power factor correction) circuit is considered, and the valley-fill PFC circuit comprises three capacitors and two diodes. Under low-power limitation, the flyback conversion topological structure is adopted for realizing higher efficiency. The high-power factor LED driving circuit disclosed by the invention improves the circuit integration level, the power factor and the circuit conversion efficiency.

High-power factor LED (light-emitting diode) driving circuit supporting silicon controlled rectifier dimming

The utility model discloses a load driving device comprising a voltage and current stabilizing main circuit, a sampling unit, and an output current controller, wherein, the voltage and current stabilizing main circuit is controlled by the output current controller to change an input voltage to provide electric energy to a backward stage load unit, the sampling unit is connected with the input end of the voltage and current stabilizing main circuit and samples the output characteristic parameters of the voltage and current stabilizing main circuit, and the output current controller controls a current limiting point of the voltage and current stabilizing main circuit, determines the steady state operating point of the voltage and current stabilizing main circuit based on the adjusting direction of the current limiting point and the change of the output characteristic parameters of the voltage and current stabilizing main circuit before adjustment and after adjustment, and controls the voltage and current stabilizing main circuit to work at the steady state operating point. The load driving device can not only enhance the driver reliability, but also reduce the circuit complexity. The utility model further discloses a control device.

Load driving device and system

What factors are most significant in understanding adoption behavior for energy efficiency technologies by commercial, residential, and industrial customers? The case of energy efficient lighting technologies is specifically examined. Several types of lighting technologies are compared to indoor LED lighting to determine how the technology meets the needs of the various user types. What factors are most significant in motivating technology adoption for such technologies, and preventing subsequent technology disadoption? This is particularly important for energy efficient lighting technologies, as both technology adoption and technology disadoption can be extremely rapid, and ongoing user involvement is often required to recognize full benefits from these technologies. The Unified Theory of Acceptance and Use of Technology (UTAUT) is useful in explaining adoption behavior related to stakeholder expectation and buy-in for the new technologies. UTAUT contains four elements that can be adapted to fit this research: (1) Performance Expectancy; (2) Effort Expectancy; (3) Social Influences; and (4) Facilitating Conditions. In the case of energy efficient lighting adoption, and LED adoption in particular, performance expectancy and effort expectancy can be related to factors such as future energy price expectancies, actual savings results, and ease of energy savings. Factors involving social influences include perceptions of environmental friendliness among different user groups, and facilitating conditions include policies, incentives, and educational programs to encourage adoption. Some conclusions are then drawn regarding adoption factors for emerging energy efficient lighting technologies.

Adoption of Energy Efficiency Technologies: A Review of Behavioral Theories for the Case of LED Lighting

The invention relates to a high-efficiency LED constant current driving circuit. The circuit comprises an input rectification filter circuit, a switch power supply management chip, an isolation switch transformer, a primary clamping circuit of the transformer, an output rectification filter circuit, an output current sampling circuit, a reference voltage generation circuit, a comparison circuit and a photoelectrical coupling circuit, wherein the input end of the input rectification filter circuit is connected with commercial AC electricity, while the output end is connected with a primary winding of the isolation switch transformer through the switch power supply management chip; the primary clamping circuit of the transformer is connected in parallel with the primary winding of the isolation switch transformer; the input end of the output rectification filter circuit is connected with the primary winding of the isolation switch transformer, while the output end is connected with LED load; an output current sampling circuit is connected in series with the LED load; the input end of the reference voltage generation circuit is connected with the LED load; and the input end of the comparison circuit is connected with the output current sampling circuit and the reference voltage generation circuit, while the output end is connected with the switch power supply management chip through the photoelectrical coupling circuit. The circuit improves the circuit integration degree, the reliability, the constant current precision and the circuit conversion efficiency.

High-efficiency LED constant current driving circuit

-High power LED (Light Emitting Diode) has a wide application in lighting for its good features. In this paper, the electrical properties of LED are first introduced, and then a series-parallel connection of LEDs with more stability and reliability is adopted on the basis of the features of parallel connection and series connection. After that, a flyback circuit for driving high power LED group with a constant-output-current is investigated, and the parameters are designed. According to the driving method, a circuit prototype with an output of 10.0V/1.10A is fabricated and tested in rated load and overload conditions to verify its current stability. Experimental results show that the LED drive circuit has a high accuracy, good stability and high efficiency, suggesting that the proposed method might be practical for driving high power LEDs. Keywords--LED lighting; flyback; constant current; drive circuit

Research on High-Efficiency Driving Technology for High Power LED Lighting

China is the world's largest emerging energy market, but due to the rapid development of China's new energy industry special, the value of new energy companies are more susceptible to sharp increases and decreases brought about by external factors in the market compared to other companies. In this paper, we propose an algorithm that uses an effective cluster learning strategy (Random Forest) contrasted with a genetic algorithm. A new financial forecasting model GSRF is constructed by parameter optimization of random forest model through grid search algorithm, and the model is applied to short-term stock forecasting. This paper builds a stock price trend forecasting model based on both algorithms and uses the model to determine whether the cost of a stock will be higher than its cost at a given date. The experimental results show that the model built using GSRF stochastic forest has the highest return and the lowest risk compared to the return based on the traditional genetic algorithm trading strategy.

Shi Song

Papers

High-efficiency LED constant current driving circuit

Research on High-Efficiency Driving Technology for High Power LED Lighting

A study of stock price analysis algorithms for new energy companies based on random forest and genetic algorithms