CN109559732A - A kind of low noise power supply noise reduction system and method - Google Patents
A kind of low noise power supply noise reduction system and method Download PDFInfo
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- CN109559732A CN109559732A CN201811511581.XA CN201811511581A CN109559732A CN 109559732 A CN109559732 A CN 109559732A CN 201811511581 A CN201811511581 A CN 201811511581A CN 109559732 A CN109559732 A CN 109559732A
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- 238000000034 method Methods 0.000 title claims abstract description 28
- 230000003321 amplification Effects 0.000 claims description 6
- 238000003199 nucleic acid amplification method Methods 0.000 claims description 6
- 230000005611 electricity Effects 0.000 claims description 5
- 238000012360 testing method Methods 0.000 claims description 4
- 230000017525 heat dissipation Effects 0.000 description 2
- 238000001228 spectrum Methods 0.000 description 2
- 238000013459 approach Methods 0.000 description 1
- 230000006854 communication Effects 0.000 description 1
- 238000001816 cooling Methods 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000005457 optimization Methods 0.000 description 1
Classifications
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- G—PHYSICS
- G10—MUSICAL INSTRUMENTS; ACOUSTICS
- G10K—SOUND-PRODUCING DEVICES; METHODS OR DEVICES FOR PROTECTING AGAINST, OR FOR DAMPING, NOISE OR OTHER ACOUSTIC WAVES IN GENERAL; ACOUSTICS NOT OTHERWISE PROVIDED FOR
- G10K11/00—Methods or devices for transmitting, conducting or directing sound in general; Methods or devices for protecting against, or for damping, noise or other acoustic waves in general
- G10K11/16—Methods or devices for protecting against, or for damping, noise or other acoustic waves in general
- G10K11/175—Methods or devices for protecting against, or for damping, noise or other acoustic waves in general using interference effects; Masking sound
- G10K11/178—Methods or devices for protecting against, or for damping, noise or other acoustic waves in general using interference effects; Masking sound by electro-acoustically regenerating the original acoustic waves in anti-phase
-
- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06F—ELECTRIC DIGITAL DATA PROCESSING
- G06F1/00—Details not covered by groups G06F3/00 - G06F13/00 and G06F21/00
- G06F1/16—Constructional details or arrangements
- G06F1/20—Cooling means
- G06F1/206—Cooling means comprising thermal management
-
- G—PHYSICS
- G10—MUSICAL INSTRUMENTS; ACOUSTICS
- G10K—SOUND-PRODUCING DEVICES; METHODS OR DEVICES FOR PROTECTING AGAINST, OR FOR DAMPING, NOISE OR OTHER ACOUSTIC WAVES IN GENERAL; ACOUSTICS NOT OTHERWISE PROVIDED FOR
- G10K2210/00—Details of active noise control [ANC] covered by G10K11/178 but not provided for in any of its subgroups
- G10K2210/10—Applications
- G10K2210/11—Computers, i.e. ANC of the noise created by cooling fan, hard drive or the like
-
- G—PHYSICS
- G10—MUSICAL INSTRUMENTS; ACOUSTICS
- G10K—SOUND-PRODUCING DEVICES; METHODS OR DEVICES FOR PROTECTING AGAINST, OR FOR DAMPING, NOISE OR OTHER ACOUSTIC WAVES IN GENERAL; ACOUSTICS NOT OTHERWISE PROVIDED FOR
- G10K2210/00—Details of active noise control [ANC] covered by G10K11/178 but not provided for in any of its subgroups
- G10K2210/30—Means
- G10K2210/321—Physical
- G10K2210/3229—Transducers
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02D—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN INFORMATION AND COMMUNICATION TECHNOLOGIES [ICT], I.E. INFORMATION AND COMMUNICATION TECHNOLOGIES AIMING AT THE REDUCTION OF THEIR OWN ENERGY USE
- Y02D10/00—Energy efficient computing, e.g. low power processors, power management or thermal management
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- Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Theoretical Computer Science (AREA)
- Acoustics & Sound (AREA)
- Multimedia (AREA)
- Human Computer Interaction (AREA)
- General Engineering & Computer Science (AREA)
- General Physics & Mathematics (AREA)
- Soundproofing, Sound Blocking, And Sound Damping (AREA)
Abstract
The invention discloses a kind of low noise power supply noise reduction system and methods, belong to active active noise reduction techniques field.Low noise power supply noise reduction system of the invention includes power supply heat sinking module and power supply noise reduction module, and the power supply heat sinking module includes temperature sensor, control unit and fan, and the temperature sensor, control unit, fan are sequentially connected with；The power supply noise reduction module includes noise collection unit, negater circuit, amplifying circuit and loudspeaker, and noise collection unit, negater circuit, amplifying circuit, loudspeaker are sequentially connected with, and noise collection unit, loudspeaker are respectively arranged at fan outlet.The low noise power supply noise reduction system of the invention can effectively reduce power supply noise, have good application value.
Description
Technical field
The present invention relates to active active noise reduction techniques field, a kind of low noise power supply noise reduction system and method are specifically provided.
Background technique
In nature, noise generation is often had, for the environment to need peace and quiet under certain working environments, reduces noise
As necessary.Reduce noise usually used by three kinds of noise reduction measures, i.e., at sound source noise reduction, in communication process noise reduction and
Go out noise reduction in human ear, these three modes are all passively.In order to initiatively eliminate noise, there is " Active Noise Control " this skill
Art.The principle of Active Noise Control is: all sound is all made of certain frequency spectrum, if a kind of sound, frequency spectrum can be found
Just the same with the noise to be eliminated, only phase is just opposite (180 ° of difference), so that it may be completely counterbalanced by this noise.
Key is that how to obtain that sound for offsetting noise.The method actually used is: setting about from noise source itself, tries to pass through
Electronic circuit turns the phase of former noise around, to be up to the purpose for eliminating noise.
With the rapid development of social economy, people's lives level is greatly increased, various advanced electricity
The scope of application of sub- equipment is more and more extensive.For large enterprise, it is impossible to meet its work for general computer performance
Demand causes the integrated level of current computer and server higher and higher, and the density of unit volume is increasing, thus bring
Radiating efficiency needs constantly to improve.For current wind-cooling heat dissipating, increases number of fans and improve rotation speed of the fan increase air quantity
Etc. means be still solve heat dissipation problem basic skills.But the raising of number of fans and revolving speed undoubtedly can all cause environment to be made an uproar
The increase of sound causes to have become the environment such as the equipment such as high-performance computer, high density server and computer room, data center at present
In seriously affect pollution sources of health of human body.Reduce equipment and the computer rooms, number such as high-performance computer, high density server
Become urgent problem to be solved according to the noise pollution in the environment such as center.It is for what the control of computer noise mostly used at present
Passive approach, for example sound-proof material, optimization heat dissipation channel etc. are covered in machine inner wall, but these methods are to the eradicating efficacy of noise
It is limited.
Summary of the invention
Technical assignment of the invention is that in view of the above problems, power supply noise can be effectively reduced by providing one kind
Low noise power supply noise reduction system.
The further technical assignment of the present invention is to provide a kind of low noise power supply noise-reduction method.
To achieve the above object, the present invention provides the following technical scheme that
A kind of low noise power supply noise reduction system, including power supply heat sinking module and power supply noise reduction module, the power supply heat sinking mould
Block includes temperature sensor, control unit and fan, and the temperature sensor, control unit, fan are sequentially connected with；The power supply
Noise reduction module includes noise collection unit, negater circuit, amplifying circuit and loudspeaker, noise collection unit, negater circuit, amplification
Circuit, loudspeaker are sequentially connected with, and noise collection unit, loudspeaker are respectively arranged at fan outlet.
The power supply heat sinking module controls the revolving speed of fan by temperature sensor and control unit, and then to control power supply
The temperature of radiating module.Power supply noise reduction module collects fan noise signal by noise collection unit, and by fan noise signal
Input inversion circuit, noise signal become the signal of with same frequency and reversed-phase by inverter cricuit, which puts by amplifying circuit classification
Big drive the speaker work, loudspeaker emit the backward-wave opposite with noise signal frequencies same phase and offset noise.Realization is worked as
When rotation speed of the fan is too fast, the noise that fan generates can be reduced by power supply noise reduction module.
Preferably, the low noise power supply noise reduction system further includes power module, power module and power supply heat sinking module, electricity
Source noise reduction module is separately connected.
Power module is power supply heat sinking module, the power supply of power supply noise reduction module, completes basic powered operation, guarantees system
It operates normally.
Preferably, the noise collection unit uses audio sensor.
Preferably, the audio sensor is the audio sensor of MP45DT02 model.
Preferably, described control unit uses singlechip controller.
Preferably, the model stm32 singlechip controller of the singlechip controller.
A kind of low noise power supply noise-reduction method, in this method, temperature sensor detects the temperature of entire power supply heat sinking module
Information, the temperature information that will test send control unit to, and temperature information adjusts the revolving speed of fan to control unit based on the received；
Noise collection unit collects fan noise signal, and by fan noise signal input inversion circuit, noise signal is by reverse phase electricity
Road becomes the signal of with same frequency and reversed-phase, which emits and make an uproar by amplifying circuit classification amplification drive the speaker work, loudspeaker
The opposite backward-wave of acoustical signal frequency same phase offsets noise.
The low noise power supply noise-reduction method realizes that low noise power supply noise reduction system includes by low noise power supply noise reduction system
Power supply heat sinking module and power supply noise reduction module, the power supply heat sinking module include temperature sensor, control unit and fan, described
Temperature sensor, control unit, fan are sequentially connected with；The power supply noise reduction module includes noise collection unit, negater circuit, puts
Big circuit and loudspeaker, noise collection unit, negater circuit, amplifying circuit, loudspeaker are sequentially connected with, and noise collection unit,
Loudspeaker is respectively arranged at fan outlet, can collect the noise information of fan generation.
Preferably, power supply heat sinking module, power supply noise reduction module are connected with the power supply module respectively outward, power module is
Power supply heat sinking module, the power supply of power supply noise reduction module.
Preferably, the noise collection unit uses audio sensor.
Audio sensor is the audio sensor of MP45DT02 model.
Preferably, described control unit uses singlechip controller.
The model stm32 singlechip controller of singlechip controller.
Compared with prior art, low noise power supply noise-reduction method of the invention have it is following prominent the utility model has the advantages that
It (one) is power supply heat sinking module, the confession of power supply noise reduction module by power module in the low noise power supply noise-reduction method
Electricity can guarantee the normal work of system；
(2) the power supply heat sinking module controls the revolving speed of fan by temperature sensor and control unit, and then to control
The temperature of power supply heat sinking module；
(3) power supply noise reduction module collects fan noise signal by noise collection unit, and fan noise signal is inputted
Inverter cricuit, noise signal become the signal of with same frequency and reversed-phase by inverter cricuit, which drives by amplifying circuit classification amplification
Dynamic speaker operation, loudspeaker emit the backward-wave opposite with noise signal frequencies same phase and offset noise, can be realized and work as
When rotation speed of the fan is too fast, the noise that fan generates can be reduced by power supply noise reduction module, there is good application value.
Detailed description of the invention
Fig. 1 is the topological diagram of low noise power supply noise reduction system of the present invention.
Specific embodiment
Below in conjunction with drawings and examples, low noise power supply noise reduction system of the invention and method are made further detailed
Explanation.
Embodiment 1
Low noise power supply noise reduction system of the invention includes power supply heat sinking module and power supply noise reduction module.
Power supply heat sinking module includes temperature sensor, control unit and fan, the temperature sensor, control unit, wind
Fan is sequentially connected with；The power supply noise reduction module includes noise collection unit, negater circuit, amplifying circuit and loudspeaker, and noise is received
Collection unit, negater circuit, amplifying circuit, loudspeaker are sequentially connected with, and noise collection unit, loudspeaker are respectively arranged at fan and go out
At air port.
Wherein, noise collection unit uses audio sensor, and audio sensor is the audio sensor of MP45DT02 model.
Control unit uses singlechip controller, the model stm32 singlechip controller of singlechip controller.
Embodiment 2
As shown in Figure 1, low noise power supply noise reduction system of the invention, including power module, power supply heat sinking module and power supply
Noise reduction module.
Power module is separately connected with power supply heat sinking module, power supply noise reduction module, and power module is used to be power supply heat sinking mould
Block, the power supply of power supply noise reduction module, safeguards system work normally.
Power supply heat sinking module includes temperature sensor, control unit and fan, the temperature sensor, control unit, wind
Fan is sequentially connected with；The power supply noise reduction module includes noise collection unit, negater circuit, amplifying circuit and loudspeaker, and noise is received
Collection unit, negater circuit, amplifying circuit, loudspeaker are sequentially connected with, and noise collection unit, loudspeaker are respectively arranged at fan and go out
At air port.
Wherein, noise collection unit uses audio sensor, and audio sensor is the audio sensor of MP45DT02 model.
Control unit uses singlechip controller, the model stm32 singlechip controller of singlechip controller.
Embodiment 3
Low noise power supply noise-reduction method of the invention, in the method, temperature sensor detect entire power supply heat sinking module
Temperature information, the temperature information that will test sends control unit to, and temperature information adjusts fan to control unit based on the received
Revolving speed；Noise collection unit collects fan noise signal, and by fan noise signal input inversion circuit, noise signal is passed through
Inverter cricuit becomes the signal of with same frequency and reversed-phase, and the signal is by amplifying circuit classification amplification drive the speaker work, loudspeaker hair
It penetrates the backward-wave opposite with noise signal frequencies same phase and offsets noise.
The low noise power supply noise-reduction method realizes that low noise power supply noise reduction system includes by low noise power supply noise reduction system
Power supply heat sinking module and power supply noise reduction module, the power supply heat sinking module include temperature sensor, control unit and fan, described
Temperature sensor, control unit, fan are sequentially connected with；The power supply noise reduction module includes noise collection unit, negater circuit, puts
Big circuit and loudspeaker, noise collection unit, negater circuit, amplifying circuit, loudspeaker are sequentially connected with, and noise collection unit,
Loudspeaker is respectively arranged at fan outlet, can collect the noise information of fan generation.
Wherein, noise collection unit uses audio sensor, and audio sensor is the audio sensor of MP45DT02 model.
Control unit uses singlechip controller, the model stm32 singlechip controller of singlechip controller.
Embodiment 4
Low noise power supply noise-reduction method of the invention, in the method, temperature sensor detect entire power supply heat sinking module
Temperature information, the temperature information that will test sends control unit to, and temperature information adjusts fan to control unit based on the received
Revolving speed；Noise collection unit collects fan noise signal, and by fan noise signal input inversion circuit, noise signal is passed through
Inverter cricuit becomes the signal of with same frequency and reversed-phase, and the signal is by amplifying circuit classification amplification drive the speaker work, loudspeaker hair
It penetrates the backward-wave opposite with noise signal frequencies same phase and offsets noise.
Power supply heat sinking module, power supply noise reduction module are connected with the power supply module respectively outward, and power module is power supply heat sinking
Module, the power supply of power supply noise reduction module.
Wherein, noise collection unit uses audio sensor, and audio sensor is the audio sensor of MP45DT02 model.
Control unit uses singlechip controller, the model stm32 singlechip controller of singlechip controller.
The low noise power supply noise-reduction method realizes that low noise power supply noise reduction system includes by low noise power supply noise reduction system
Power module, power supply heat sinking module and power supply noise reduction module.
Power module is separately connected with power supply heat sinking module, power supply noise reduction module, and power module is used to be power supply heat sinking mould
Block, the power supply of power supply noise reduction module, safeguards system work normally.
Power supply heat sinking module includes temperature sensor, control unit and fan, the temperature sensor, control unit, wind
Fan is sequentially connected with；The power supply noise reduction module includes noise collection unit, negater circuit, amplifying circuit and loudspeaker, and noise is received
Collection unit, negater circuit, amplifying circuit, loudspeaker are sequentially connected with, and noise collection unit, loudspeaker are respectively arranged at fan and go out
At air port, the noise information of fan generation can be collected.
Embodiment described above, the only present invention more preferably specific embodiment, those skilled in the art is at this
The usual variations and alternatives carried out within the scope of inventive technique scheme should be all included within the scope of the present invention.
Claims (10)
1. a kind of low noise power supply noise reduction system, it is characterised in that: including power supply heat sinking module and power supply noise reduction module, the electricity
Source heat-dissipating module includes temperature sensor, control unit and fan, and the temperature sensor, control unit, fan are sequentially connected with；
The power supply noise reduction module includes noise collection unit, negater circuit, amplifying circuit and loudspeaker, noise collection unit, reversed
Circuit, amplifying circuit, loudspeaker are sequentially connected with, and noise collection unit, loudspeaker are respectively arranged at fan outlet.
2. low noise power supply noise reduction system according to claim 1, it is characterised in that: further include power module, power supply mould
Block is separately connected with power supply heat sinking module, power supply noise reduction module.
3. low noise power supply noise reduction system according to claim 1 or 2, it is characterised in that: the noise collection unit is adopted
Use audio sensor.
4. low noise power supply noise reduction system according to claim 3, it is characterised in that: the audio sensor is
The audio sensor of MP45DT02 model.
5. low noise power supply noise reduction system according to claim 4, it is characterised in that: described control unit uses single-chip microcontroller
Controller.
6. low noise power supply noise reduction system according to claim 5, it is characterised in that: the model of the singlechip controller
For stm32 singlechip controller.
7. a kind of low noise power supply noise-reduction method, it is characterised in that: in this method, temperature sensor detects entire power supply heat sinking mould
The temperature information of block, the temperature information that will test send control unit to, and temperature information adjusts wind to control unit based on the received
The revolving speed of fan；Noise collection unit collects fan noise signal, and by fan noise signal input inversion circuit, noise signal is passed through
Crossing inverter cricuit becomes the signal of with same frequency and reversed-phase, and the signal is by amplifying circuit classification amplification drive the speaker work, loudspeaker
Emit the backward-wave opposite with noise signal frequencies same phase and offsets noise.
8. low noise power supply noise-reduction method according to claim 7, it is characterised in that: power supply heat sinking module, power supply noise reduction
Module is connected with the power supply module respectively outward, and power module is power supply heat sinking module, the power supply of power supply noise reduction module.
9. low noise power supply noise-reduction method according to claim 7 or 8, it is characterised in that: the noise collection unit is adopted
Use audio sensor.
10. low noise power supply noise-reduction method according to claim 9, it is characterised in that: described control unit uses monolithic
Machine controller.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
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| CN201811511581.XA CN109559732A (en) | 2018-12-11 | 2018-12-11 | A kind of low noise power supply noise reduction system and method |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201811511581.XA CN109559732A (en) | 2018-12-11 | 2018-12-11 | A kind of low noise power supply noise reduction system and method |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113007145A (en) * | 2021-04-08 | 2021-06-22 | 浪潮商用机器有限公司 | Cooling fan noise reduction assembly and server |
| WO2022179069A1 (en) * | 2021-02-25 | 2022-09-01 | 荣耀终端有限公司 | Noise reduction method for fan of laptop and laptop |
Citations (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2715453Y (en) * | 2004-07-15 | 2005-08-03 | 尚朋堂(广州)电器有限公司 | Electromagnetic oven noise abatement and squelch control device |
| CN102954045A (en) * | 2012-10-31 | 2013-03-06 | 浪潮集团有限公司 | Method for reducing noise of server fan by adopting active method |
| CN103916777A (en) * | 2012-12-31 | 2014-07-09 | 广州励丰文化科技股份有限公司 | Control method of intelligent noise-reducing active speaker |
| CN104141638A (en) * | 2014-07-29 | 2014-11-12 | 浪潮集团有限公司 | Fan device achieving active noise reduction |
| CN204082299U (en) * | 2014-09-01 | 2015-01-07 | 奇瑞汽车股份有限公司 | A kind of automobile cooling heat dissipation fan control system |
| CN205160354U (en) * | 2015-12-09 | 2016-04-13 | 赵晓冬 | Heat dissipation noise reduction module formula switching power supply |
| CN205983375U (en) * | 2016-07-20 | 2017-02-22 | 广西科技大学鹿山学院 | Notebook computer fan automatic temperature control accuse prompt drop device of making an uproar |
| CN206421487U (en) * | 2017-02-14 | 2017-08-18 | 西安外事学院 | A kind of efficient computer heat radiating device |
| CN207033848U (en) * | 2017-07-05 | 2018-02-23 | 深圳市深之蓝科技有限公司 | A kind of circuit devcie for reducing fan noise |
| CN207731220U (en) * | 2017-12-08 | 2018-08-14 | 天津大月科技有限公司 | A kind of cpu fan of rapid cooling |
-
2018
- 2018-12-11 CN CN201811511581.XA patent/CN109559732A/en active Pending
Patent Citations (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2715453Y (en) * | 2004-07-15 | 2005-08-03 | 尚朋堂(广州)电器有限公司 | Electromagnetic oven noise abatement and squelch control device |
| CN102954045A (en) * | 2012-10-31 | 2013-03-06 | 浪潮集团有限公司 | Method for reducing noise of server fan by adopting active method |
| CN103916777A (en) * | 2012-12-31 | 2014-07-09 | 广州励丰文化科技股份有限公司 | Control method of intelligent noise-reducing active speaker |
| CN104141638A (en) * | 2014-07-29 | 2014-11-12 | 浪潮集团有限公司 | Fan device achieving active noise reduction |
| CN204082299U (en) * | 2014-09-01 | 2015-01-07 | 奇瑞汽车股份有限公司 | A kind of automobile cooling heat dissipation fan control system |
| CN205160354U (en) * | 2015-12-09 | 2016-04-13 | 赵晓冬 | Heat dissipation noise reduction module formula switching power supply |
| CN205983375U (en) * | 2016-07-20 | 2017-02-22 | 广西科技大学鹿山学院 | Notebook computer fan automatic temperature control accuse prompt drop device of making an uproar |
| CN206421487U (en) * | 2017-02-14 | 2017-08-18 | 西安外事学院 | A kind of efficient computer heat radiating device |
| CN207033848U (en) * | 2017-07-05 | 2018-02-23 | 深圳市深之蓝科技有限公司 | A kind of circuit devcie for reducing fan noise |
| CN207731220U (en) * | 2017-12-08 | 2018-08-14 | 天津大月科技有限公司 | A kind of cpu fan of rapid cooling |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2022179069A1 (en) * | 2021-02-25 | 2022-09-01 | 荣耀终端有限公司 | Noise reduction method for fan of laptop and laptop |
| CN113007145A (en) * | 2021-04-08 | 2021-06-22 | 浪潮商用机器有限公司 | Cooling fan noise reduction assembly and server |
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