Abstract: The present disclosure relates to a solar cell, a preparation method thereof, and a photovoltaic module. The solar cell includes a substrate including a first surface, a passivating contact structure disposed on a part of the first surface, and a first electrode disposed on a side of the passivating contact structure away from the substrate and electrically connected to the passivating contact structure. A marking portion is disposed on a part of the passivating contact structure.

Abstract: An absorbent, a preparation method therefor and use thereof are provided. The absorbent has a liquid channel, and the liquid channel has a low-tortuous porous structure. The absorbent can realize fast and large-scale absorption of various liquids without consuming external energy and not requiring additional apparatuses when in use. The absorbent can be used for efficient, safe and comfortable medical sampling and can also be used for recovery of various liquids.

Abstract: A method for surface-enhanced Raman spectroscopy identification based on potential regulation includes the following steps: S30: adding a solution to be tested to an electrolytic cell; S40: placing nanostructured substrates in the electrolytic cell to serve as an anode and a cathode, respectively; S50: adding an enhancing reagent to the solution to be tested and setting a potential; and S60: after adsorption and enrichment on the nanostructured substrate, measuring a Raman signal. The electrochemical pretreatment method for surface-enhanced Raman spectroscopy identification based on potential regulation provided herein can promote target molecules to be adsorbed onto a substrate, and enables a signal of a target peak to be amplified by ten thousand or even a million folds.

Abstract: The present disclosure relates to a solar cell, a preparation method thereof, and a photovoltaic module. The solar cell includes a semiconductor substrate, passivating contact structures, a dielectric layer, and first electrodes. The semiconductor substrate includes a first surface and a second surface opposite to each other. The semiconductor substrate includes passivation regions and passivated contact regions, which are alternately arranged along a first direction. The first direction is perpendicular to a thickness direction of the semiconductor substrate. The passivating contact structures are disposed on the second surface and correspondingly disposed on the passivated contact regions. Each passivating contact structure includes an electrically conductive passivation layer. The dielectric layer at least covers the second surface in the passivation regions. The first electrodes are disposed on the passivating contact structures at a side away from the semiconductor substrate.

Abstract: The present invention belongs to the field of power system operations and provides a method for quantifying the flexibility demand and coordinating optimization of a hydro-wind-solar multi-energy complementary system. Firstly, the flexibility demand quantification method considering the uncertainty of wind and solar power output is constructed, and the wind and solar power output interval is divided by using quantile points to generate a set of output scenarios, and then the flexibility demand under each scenario is calculated. Based on the quantitative index of flexibility demand, an optimal operation model of hydro-wind-solar complementary system considering the minimum expectation of system flexibility deficiency is constructed to realize the optimal calculation of hydro-wind-solar complementary. By utilizing an actual wind-hydro complementary system of the Yunnan Power Grid, the model is validated for different new energy access ratios.

Abstract: A radiator and a photographic light. The radiator includes a coolant tank, a support frame, a heat-absorbing assembly and a driving pump. The coolant tank has a heat exchange pipe for a coolant to circulate, and the heat exchange pipe has a first liquid inlet and a first liquid outlet; the support frame is arranged around the coolant tank, the support frame and the coolant tank enclose a heat exchange space for exchanging heat with the heat exchange pipe; the heat-absorbing assembly has a heat dissipation channel, and the heat dissipation channel has a second liquid inlet and a second liquid outlet; the driving pump is configured to drive the coolant to circulate along the heat exchange pipe, the first liquid outlet, the second liquid inlet, the heat dissipation channel, the second liquid outlet and the first liquid inlet in sequence.

Abstract: A method for microengineering a gradient structure on a metal surface. A metal surface including at least first, second, and third metal surface regions is exposed to a metal-removing agent. A portion of surface metal atoms is removed by the metal-removing agent in each of the first, second, and third metal surface regions. Sequential metal removal processes expose only the second and third regions to the metal-removing agent, followed by exposing only the third region to the metal-removing agent. A gradient metal surface is formed having different properties in each of the first, second, and third metal surface regions. In a further aspect, quantitative surface-enhanced Raman spectroscopy may be performed using the treated metal surface. An amount of an analyte is determined based on its position in one of the first, second, or third metal surface regions.

Abstract: A radiator and a photographic light. The radiator includes a coolant tank, a support frame, a heat-absorbing assembly and a driving pump. The coolant tank has a heat exchange pipe for a coolant to circulate, and the heat exchange pipe has a first liquid inlet and a first liquid outlet; the support frame is arranged around the coolant tank, the support frame and the coolant tank enclose a heat exchange space for exchanging heat with the heat exchange pipe; the heat-absorbing assembly has a heat dissipation channel, and the heat dissipation channel has a second liquid inlet and a second liquid outlet; the driving pump is configured to drive the coolant to circulate along the heat exchange pipe, the first liquid outlet, the second liquid inlet, the heat dissipation channel, the second liquid outlet and the first liquid inlet in sequence.

Abstract: An adsorbent, a preparation method therefor and use thereof are provided. The adsorbent has a liquid channel, and the liquid channel has a low-tortuous porous structure. The adsorbent can realize fast and large-scale absorption of various liquids without consuming external energy and not requiring additional apparatuses when in use. The adsorbent can be used for efficient, safe and comfortable medical sampling and can also be used for recovery of various liquids.

Abstract: A Raman detection system has a Raman spectrometer and a fixing light shielding stand. One end of the fixing light shielding stand is fixedly connected to the Raman spectrometer, and the other end is disposed with an entrance groove for a needle-like SERS probe to enter. A slot for fixing the needle-like SERS probe is formed at an end of the entrance groove, and the slot and the needle-like SERS probe match in shape and size. The Raman detection system has a fixing light shielding device with a dark color groove and a focal length. The groove can be used for limiting the rolling of the curved surface structure of the needle-like SERS probe. A laser can be focused on the curved surface more accurately by adjusting the distance from the instrument detector to the SERS probe.

Abstract: A method for microengineering a gradient structure on a metal surface. A metal surface including at least first, second, and third metal surface regions is exposed to a metal-removing agent. A portion of surface metal atoms is removed by the metal-removing agent in each of the first, second, and third metal surface regions. Sequential metal removal processes expose only the second and third regions to the metal-removing agent, followed by exposing only the third region to the metal-removing agent. A gradient metal surface is formed having different properties in each of the first, second, and third metal surface regions. In a further aspect, quantitative surface-enhanced Raman spectroscopy may be performed using the treated metal surface. An amount of an analyte is determined based on its position in one of the first, second, or third metal surface regions.

Abstract: The present disclosure provides a photography lamp. The photography lamp includes a housing, an ejector rod, and a bracket. The housing includes a front housing and a mid-frame, an accessory slot is arranged on a side of the front housing, the bracket is arranged on another side of the front housing away from the accessory slot and slidably connected to the front housing; the bracket includes a connecting rod and a pushing rod connected at an included angle. The space occupied by the bracket is reduced, and the structure of the photography lamp is more compact and smaller.

Abstract: The present invention belongs to the field of power system operations and provides a method for quantifying the flexibility demand and coordinating optimization of a hydro-wind-solar multi-energy complementary system. Firstly, the flexibility demand quantification method considering the uncertainty of wind and solar power output is constructed, and the wind and solar power output interval is divided by using quantile points to generate a set of output scenarios, and then the flexibility demand under each scenario is calculated. Based on the quantitative index of flexibility demand, an optimal operation model of hydro-wind-solar complementary system considering the minimum expectation of system flexibility deficiency is constructed to realize the optimal calculation of hydro-wind-solar complementary. By utilizing an actual wind-hydro complementary system of the Yunnan Power Grid, the model is validated for different new energy access ratios.

Abstract: A biological sample detection method based on surface-enhanced Raman spectroscopy is disclosed, which relates to the technical field of biological detection. The method includes following operations: washing a substrate used for Raman spectroscopy to obtain a clean substrate; performing surface nanostructuring on the clean substrate to make the clean substrate have a surface Raman enhancement effect, and ultrasonically cleaning the nanostructured substrate with clear water to obtain a surface nanostructured substrate; and inserting the surface nanostructured substrate in a test biological sample, and taking it out after adsorbing the substance to be detected, and then detecting Raman spectrum signals on the surface.

Abstract: The present disclosure provides a photography lamp. The photography lamp includes a housing, an ejector rod, and a bracket. The housing includes a front housing and a mid-frame, an accessory slot is arranged on a side of the front housing, the bracket is arranged on another side of the front housing away from the accessory slot and slidably connected to the front housing; the bracket includes a connecting rod and a pushing rod connected at an included angle. The space occupied by the bracket is reduced, and the structure of the photography lamp is more compact and smaller.

Abstract: A lighting device is provided and includes: a lamp main housing including a containing cavity, wherein a recess in communication with the containing cavity and a snap-fit structure configured to connect an optical accessory are disposed at an end of the lamp main housing, and a position of the recess corresponds to a position of the snap-fit structure; a heat dissipation device disposed in the containing cavity; a light source in heat-conduction connection with the heat dissipation device, and located inside of the containing cavity or the recess; a front-end housing including a throughout hollow cavity, wherein an end of the front-end housing is disposed on the light source, and another end of the front-end housing faces an outer side of the recess and passes through the recess; wherein light emitted by the light source passes through the hollow cavity of the front-end housing and is emitted outward.

Abstract: A method for treating a surface of a metallic structure, the metallic structure being made of a first metallic material, the method including the steps of: (a) releasing metallic ions from the surface of the metallic structure; and (b) depositing a nano-structured metallic layer onto the surface of the metallic structure from the released metallic ions, wherein the nano-structured metallic layer includes uniform nanoparticles.

Abstract: A metallic structure and a method for surface treatment of a metallic structure. The method includes the steps of: defining a first surface morphology on a surface of the metallic structure using a first surface treatment process; and manipulating the surface using a second surface treatment process to transform the first surface morphology to a second surface morphology; wherein the metallic structure is substantially made of a first metallic material; and wherein the second surface treatment process includes performing at least one cycle of depositing the first metallic material on the surface of the metallic structure and etching away at least some of the first metallic material from the metallic structure.

Abstract: A method for treating a surface of a metallic structure, the metallic structure being made of a first metallic material, the method including the steps of: (a) releasing metallic ions from the surface of the metallic structure; and (b) depositing a nano-structured metallic layer onto the surface of the metallic structure from the released metallic ions, wherein the nano-structured metallic layer includes uniform nanoparticles.