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All-inorganic cesium lead halide perovskite nanostructures have become an outstanding luminous optoelectronic material for illumination and display. In this paper, we synthesized monodispersed colloidal single- and mixed-halide CsPbX3 (X = Cl, Br, I) nanocrystals with various morphologies and brightly luminescent properties. By varying the amount of PbX2 (X = Cl, Br, I), the prepared CsPbX3 nanocrystals possess high photoluminescence quantum yield (PLQY, about 70%), narrow full width at half-maximum (FWHM) (4–17 nm), tunable band gap (407–680 nm), and highly strong photostability. In addition, it is found that the PL decay lifetime of CsPbX3 nanocrystals ranged from 1 to 6 ns, and their PL mechanism was studied thoroughly. These corresponding results demonstrate that all-inorganic colloidal CsPbX3 perovskite nanocrystals are expected to have a promising application in the field of optoelectronic material.

Phenolic compounds are commonly incorporated into muscle foods to inhibit lipid oxidation and modify product flavor. Those that are present in or extracted from plant sources (seeds, leaves, and stems) known as "phytophenols" are of particular importance in the current meat industry due to natural origins, diversity, and safety record. Apart from these primary roles as antioxidants and flavorings, phytophenols are now recognized to be chemically reactive with a variety of food constituents, including proteins. In processed muscle foods, where the structure-forming ability is critical to a product's texture-related quality attributes and palatability, the functional properties of proteins, especially gelation and emulsification, play an essential role. A vast amount of recent studies has been devoted to protein-phenol interactions to investigate the impact on meat product texture and flavor. Considerable efforts have been made to elucidate the specific roles of phytophenol interaction with "myoproteins" (i.e., muscle-derived proteins) probing the structure-forming process in cooked meat products. The present review provides an insight into the actions of phytophenols in modifying and interacting with muscle proteins with an emphasis on the reaction mechanisms, detection methods, protein functionality, and implications for structural characteristics and textural properties of muscle foods.

The COVID-19 outbreak is a global crisis that has placed small and medium enterprises (SMEs) under huge pressure to survive, requiring them to respond effectively to the crisis. SMEs have adopted various digital technologies to cope with this crisis. Using a data set from a survey with 518 Chinese SMEs, the study examines the relationship between SMEs’ digitalization and their public crisis responses. The empirical results show that digitalization has enabled SMEs to respond effectively to the public crisis by making use of their dynamic capabilities. In addition, digitalization can help improve SMEs’ performance. We propose a theoretical framework of digitalization and crisis responses for SMEs and present three avenues for future research.

All-inorganic cesium lead halide perovskite nanostructure CsPbBr3 quantum dots have brought extensive attention in photoelectric applications. In this paper, CsPbBr3 quantum dots were synthesized with the diameter ranges from 8.7 to 11.8 nm by adjusting reaction temperature from 140 to 180 °C. In addition, for the monodisperse CsPbBr3 nanocrystals, it was found that radiative lifetime exists between 5 and 20 ns and PL decay lifetimes ranges from 4 to 11 ns, and their PL mechanism was studied thoroughly.

The replicas with resolution doubling have been fabricated by capillary force lithography. We studied several masters with characteristic sizes range from micron to submicron. Replicas with resolution doubling fabricated by a DVD master were demonstrated and discussed in detail. The fabricated replicas demonstrated an average period of ~370 nm, which is half period of the DVD master. This method breaks the rule of one-to-one replication. The key factor to fabricate a replica with resolution doubling is to utilize a thin film with the thickness between 50 nm and 100 nm for the DVD master. Therefore, it seems to be no threshold for anyone to apply this method. Meanwhile it exhibits excellent reproducibility and stability.

Currently, the reversible logic circuit is a popular research topic in the field of information processing as it is a most effective approach to minimize power consumption, which can achieve the one-to-one mapping function to identify the input signals from its corresponding output signals. In this letter, we propose and experimentally demonstrate an optical Feynman gate for reversible logic operation using silicon micro-ring resonators (MRRs). Two electrical input signals (logic operands) are applied across the micro-heaters above MRRs to determine the switching states of MRRs, and the reversible logic operation results are directed to the output ports in the form of light, respectively. For proof of concept, the thermo-optic modulation scheme is used to achieve MRR’s optical switching function. At last, a Feynman gate for reversible logic operation with the speed of 10 kbps is demonstrated successfully.

In this paper, we propose a reconfigurable electro-optic logic circuit, which can perform any combinatorial logic operations using a microring resonator (MRR)-based optical switching array. The operands are represented by electrical signals, which are applied to the corresponding MRRs to control their switching status. The operation results are directed to the output port in the form of light. For proof of concept, the circuit consisting of four thermooptic MRR-based optical switches is fabricated on the silicon-on-insulator (SOI) substrate using the commercial complementary metal-oxide-semiconductor (CMOS) fabrication process. Finally, several logic operations of four operands with the operation speed of 10 kb/s are demonstrated successfully.

Circadian clock plays an essential role in orchestrating daily physiology, and its disruption can evoke metabolic diseases such as obesity. L-Carnitine can reduce blood lipid levels, and ameliorate fatty liver through regulating lipid metabolism. However, whether L-Carnitine administration may affect the disturbance of lipid metabolism and circadian rhythm of mice induced by prolonged circadian disruption is still unknown. Herein, we investigated the effects of L-Carnitine on conditions of circadian clock and lipid metabolism through a chronic jet-lag mice model which was developed by reversing 12 h light/12 h dark cycle every 4 days for a continuous 12 weeks. Results showed that L-Carnitine administration significantly decreased levels of serum glutamic-oxaloacetic transaminase (GOT) and triglycerides (TG), which were remarkably elevated by chronic jet-lag. More importantly, quantitative real-time polymerase chain reaction (qRT-PCR) analysis indicated that L-Carnitine supplementation would effectively counteract the negative alterations in gene expression which related to lipid metabolism (Srebp1, Acaca, Fasn, and Scd1), metabolic regulator (mTOR) and circadian rhythm (Bmal1, Per1, Cry1 and Dec1) in the liver of mice subjected to the chronic jet-lag. As a conclusion, L-Carnitine was partly effective in preventing the disruption of circadian clock and lipid metabolic disorders induced by the chronic jet-lag.

With the increasing integration of photovoltaic, it is of much significance to study the capacity of grid-connected photovoltaic integration because peak load regulation capacity of power grid has become the bottleneck problem. This paper applies the Lagrangian Relaxation method of unit combination problem to find the photovoltaic integration capacity. With the consideration of peak load regulation, the optimal goal is to find the minimum system operating cost with wind power and photovoltaic introduced in the start-up mode model of unit combination. This method is applied to the analysis of future photovoltaic integration capacity of a solar resourceful province in north China according to the power structure and spinning reserve capacity, obtaining that the accommodating capacity is greater than planned. Some suggestions are put forward to magnify the integration capacity according to actual situation. These results provide reference to power supply plan, grid frame construction, operation and dispatch.

In China, the discrete type transformer has been widely used due to the increasing of underground substation and indoor substation, with constrains of the problem of land occupancy and urban environmental sustainability. This paper proposes a finite element method for studying the thermal model of the discrete type transformer. By solving finite element equations, the temperature field and flow field distribution of the discrete type transformer are established. A visual image of the simplified model is provided with the help of COMSOL software, to simulate the thermal model of the discrete type transformer. Then, the heat dissipation effect influenced by environment temperature and length of the pipeline is analyzed. According to thermal model, the discrete type transformer shows better performance in heat dissipation and practicability, especially when comparing with the traditional integrated transformer. This study has guiding influence on the design of transformer.

Business model innovation (BMI) is critical for entrepreneurial firms, but the mechanism explaining how BMI impacts firm performance remains under-researched. Drawing on insights from the resource-...

We report an electro-optic photonic integrated circuit which can perform the exclusive (XOR) logic operation based on two silicon parallel-cascaded microring resonators (MRRs) fabricated on the silicon-on-insulator (SOI) platform. PIN diodes embedded around MRRs are employed to achieve the carrier injection modulation. Two electrical pulse sequences regarded as two operands of operations are applied to PIN diodes to modulate two MRRs through the free carrier dispersion effect. The final operation result of two operands is output at the Output port in the form of light. The scattering matrix method is employed to establish numerical model of the device, and numerical simulator SG-framework is used to simulate the electrical characteristics of the PIN diodes. XOR operation with the speed of 100Mbps is demonstrated successfully.

We demonstrate an all-optical tunable microfiber knot resonator (MFKR) by direct light-graphene interaction using external vertical incidence pump laser. The 1530 nm CW pump source is employed to irradiate the sample, which can achieve the performance modulation of MFKR including transmission loss, extinction ratio, and resonant wavelength by the saturable absorption, photo-thermal, and optical Kerr effects, respectively. Compared with the MFKR with only the bottom graphene film, the tunable ranges of transmission loss and extinction ratio are increased by 69 and 125 times, respectively, which can induce a remarkable amplitude tuning. The resonant wavelength of MFKR occurs a red-shift under the irradiation of the pump light, and the red-shift range can exceed one free spectral range (FSR), which means the resonant wavelength could be tuned in the full wavelength range of the transparent window of optical fiber. It is promising for the device to be applied as an all-optical modulator, tunable optical filter, etc.