Low Consumption Rate Research Articles

Efficacy of Great Northern beans-derived bioactive compounds in reducing vascular inflammation

Dry beans (Phaseolus vulgaricus) are gaining recognition as an exceptional plant-based protein source, with studies showing reduced risks of cardiovascular diseases, obesity, and diabetes due to their bioactive compounds. Despite being one of the highest produced legumes in the US, Great Northern beans (GNB) have lower consumption rates than other beans. This study utilized an innovative aqueous-based isolation method to identify bioactive compounds in GNB. The <3 kDa fraction reduced TNF-α-induced inflammatory and oxidative stress in vascular endothelial cells (HUVEC). Comprising γ-glutamyl peptides, dipeptides rich in hydrophobic and aromatic amino acids, and phenolic compounds, the bioactive <3 kDa fraction's effects were preserved even after simulated gastrointestinal digestion. These findings suggest that GNBs' bioactive compounds may exert systemic inhibition against vascular inflammation and oxidative stress, presenting promising potential for preventing vascular diseases. Further research is required to incorporate this bioactive fraction into foods or developing novel GNB based foods could potentially enhance the consumption of GNB as well support the cardiovascular health of the consumers.

Experimental study on the ignition in a scramjet with a self-designed water plasma ignitor

In this paper, aiming at the problematic situation of igniting and improving combustion efficiency in a supersonic combustor, a self-designed water plasma ignitor is designed for ignition in supersonic combustors. For the self-designed water plasma ignitor, deionized water is selected as the coolant. During the ignitor operation, the water coolant cools the cathode and evaporates. Steam is ionized between the cathode and anode, generating a water plasma jet that is injected into the combustor for ignition. The self-designed ignitor has the advantages of long-time operation, repeatable startup, convenient coolant portability, and a low water consumption rate. The temperature of the water plasma jet exceeds 3500 K. The calculation of ignition delay time indicates that OH, H, and other free radicals in water plasma can significantly shorten the ignition delay time of kerosene and extend the ignition equivalence ratio limitation. The ignition experimental study was conducted using the water plasma ignitor in a thin strut equipped supersonic combustor whose design point corresponds to the cruise condition at a Mach number of 6. In the ignition experiment, a flame, which is self-sustaining, was established after the ignitor was activated for approximately 682 ms. The feasibility of the water plasma ignitor in a supersonic combustor has been verified.

Highly efficient and selective extraction of Au(I) from thiosulfate gold-leaching solution using diphenylphosphine

Solvent extraction has the advantages of continuous operation mode and high loading capacity, which has received some attention in the field of thiosulfate gold leaching, but current research results are not satisfactory. In this study, diphenylphosphine (DPP) diluted in benzene was used to extract gold from thiosulfate solution, and its extraction behavior and properties were investigated. The effects of the DPP concentration, pH value, contact time, and sodium thiosulfate concentration on the extraction performance were evaluated. Under the optimal conditions, 0.7 mmol/L DPP showed high gold-extraction efficiency (99%) from 0.2 mol/L S2O32− solution embracing 10 mg/L Au(I) at pH = 10.0 with an aqueous/organic (A/O) ratio of 2. A high A/O ratio (A/O = 15) can be used in the extraction stage to achieve complete recovery of gold ions from solution. In addition, DPP showed high selectivity and recovery ability in Cu–NH3–thiosulfate gold-leaching solution, and the recovery rate was higher than 99%. The mechanism of gold-ion extraction by DPP involving ligand exchange between DPP− and [Au(S2O3)2]3− was confirmed by X-ray photoelectron spectroscopy, Fourier-transform infrared spectroscopy. The P atom in Ph2–P− plays an important role in complexation of gold ions, which was confirmed by density functional theory calculation. The extraction method with low reagent consumption and high recovery rate developed in this study will greatly promote the development of gold leaching with thiosulfate.

The effect of different levels of protein and fat on dietary preference and survival of western honey bees workers, Apis mellifera L.

This study was conducted at the bee laboratory in the Faculty of Agriculture at the University of Kufa to investigate the possibility of using artificial feeding with protein and fat as an alternative to pollen. The study also aimed to examine the preference of nurse honey bees for artificial feeding mixtures and their consumption compared to a sugar solution (Sucrose 1 M ), and finally to determine the effect of feeding mixtures on the lifespan of nurse bee workers. The results showed that the highest consumption rate of nurse honey bees was in the control treatment (Sucrose 1 M ) at 72.57 microliter /bee /day, while the lowest consumption rate was 27.70 microliter /bee /day in the treatment (15:1 P: F). The consumption rates in the treatments (0:1 P:F), (1:1 P: F), (5:1 P: F ), and (10:1 P: F) were 64.80, 47.24, 44.70, and 32.42 microliter /bee /day, respectively. The results also revealed that the highest survival rate was in the control treatment (Sucrose 1 M) at 96.25%, while the treatment (0:1 P: F) had the lowest survival rate at 67.50%. The survival rates in the treatments (1:1 P: F), (5:1 P: F), (10:1 P: F), and (15:1 P: F) were 81.25%, 73.75%, 83.75%, and 86.25%, respectively.

Effects of moisture decrease on behavioural and life history traits in three species of terrestrial isopods

In the context of the predicted global warming, we investigated whether the feeding activity and the behaviour of three Oniscidean species (Porcellionides pruinosus, Porcellio laevis and Armadillidium tunisiense) would be affected by the relative humidity (RH) decrease. A decreasing gradient of relative humidity (90%, 70% and 50%) was used to study the impact of predicted climate change on the survival rate, litter consumption rate, growth efficiency, faeces production, localization and stress behaviour within woodlice. After 3 weeks of exposure, we found that all species were variously affected by the RH decrease. The species A. tunisiense showed to be the least affected by the increased dry conditions. In driest conditions, woodlice spend less time at foraging inducing a low rate of litter consumption and faeces production. Perhaps, the authors findings could contribute to changes in the decomposition process and then the soil functionality.

Experimental investigation and artificial neural network prediction of small-scale compressed air energy storage system based on pneumatic motor

Compressed air energy storage (CAES) possesses the advantages of high reliability, good economic performance, longer discharge time, extended service life, and comprehensive utilization of heat, cold, and electricity. In this study, a CAES test bench based on a pneumatic motor (PM) is built, and the output performance of the CAES system is investigated under the variable working conditions represented by the change of the compressed air pressure and the fluctuation of the load demand. The effects of major parameters like torque, voltage, current, rotation speed, and regulated pressure on the power output and energy efficiency of the PM and generator are analyzed. By the evaluation of learning rate difference, number of hidden layer neural networks, and training function, a prediction model of CAES based on artificial neural network (ANN) is developed. By checking the mean-square error and related coefficient, the ANN model is validated by subsequent experimental results. Finally, to predict the maximum power output and energy efficiency of the PM and generator, genetic algorithm is supplemented for the parameters optimization. From the result, it can be found that the high power output range of the PM is concentrated in the low voltage, high current and medium-to-high rotation speed regions. Likewise, the low compressed air consumption rate of PM is concentrated mainly in the regions of low voltage, low rotation speed, high current and high torque. When the regulated pressure reaches 10.5 bar and the current value sync reaches 13 A, PM can generate a maximum output power of approximate 658 W.

Housing prices and household consumption: a threshold effect model analysis in central and western China

The relationship between housing prices (HP) and household non-housing consumption (CON) is a key topic worldwide. By developing a panel threshold model and utilizing data from 18 provinces in central and western China from 2005 to 2020, this study investigates the impact of housing prices on household non-housing consumption given housing credit constraints. The results show that (1) housing credit constraints play a single threshold role in the impact of housing prices on household non-housing consumption; (2) the elasticity of housing price fluctuation on household non-housing consumption was negative in the western region during the entire sample period, and the elasticity of housing price fluctuation on household non-housing consumption decreased when housing credit constraints exceeded its threshold value; (3) the effects of housing price fluctuation on household non-housing consumption in the central region changed from negative to positive when housing credit constraints exceeded its threshold value. These outcomes implies that housing credit constraints are not a factor driving a low household non-housing consumption rate in the studied regions. Importantly, our findings suggest that unaffordable housing prices and homeownership linked to better public education resources in combination were a key factor leading to a low non-housing consumption rate in the studied regions. The main contribution of this paper is to supplement the current academic research on low levels of consumption in underdeveloped regions of China and the impact of housing prices on consumption.

Energy efficiency evaluation and optimization of active distribution networks with building integrated photovoltaic systems

With the rapid development of building integrated photovoltaic (BIPV) technology, rooftop PV grid-connected systems face challenges in operation. When the consumption rate of BIPV systems is low, power reverse increases distribution network losses and decreases power supply quality. Traditional energy efficiency evaluations for distribution networks do not consider the impact of low BIPV consumption rates on network losses. This paper establishes an energy efficiency evaluation model for distribution networks with BIPV systems based on adversarial interpretive structural modeling and proposes an energy efficiency indicator system applicable to distribution networks with BIPV systems. The method was applied to eight distribution networks with BIPV systems, achieving accurate energy efficiency level rankings. Through single-factor sensitivity analysis of the indicator system, the primary factors affecting distribution networks with BIPV systems energy efficiency were identified. A reactive power optimization model based on multi-objective particle swarm optimization algorithm was established. After optimization, network losses decreased by 153 kW, PV consumption rate increased by 73 %, and node voltage drift was significantly enhanced. Corresponding loss reduction strategies were proposed for other indicators. This paper provides valuable references for planning and renovating distribution networks with BIPV systems.

Aquatic insects balance growth with future supply of algal food resources

Many consumers depend on the contemporaneous growth of their food resources. For example, Tanytarsus gracilentus midges feed on algae, and because midge generation time is much longer than that of algae, individual midges benefit not just from the standing stock but also from the growth of algae during their lifespans. This implies that an intermediate consumption rate maximizes midge somatic growth: low consumption rates constrain midge growth because they do not fully utilize the available food, whereas high consumption rates suppress algal biomass growth and consequently limit future food availability. An experiment manipulating midge presence and initial algal abundance showed that midges can suppress algal growth, as measured by changes in algal gross primary production (GPP). We also found a positive relationship between GPP and midge growth. A consumer–resource model fit to the experimental data showed a hump‐shaped relationship between midge consumption rates and their somatic growth. In the model, predicted midge somatic growth rates were only positively associated with GPP when their consumption rate was below the value that optimized midge growth. Therefore, midges did not overexploit algae in the experiment. This work highlights the balance that consumers which depend on contemporaneous resource growth might have to strike between short‐term growth and future food availability, and the benefits for consumers when they ‘manage' their resources well.

Combined Triazole Disinfectants and Their Influence on the Growth and Development of Spring Wheat Seedlings

Seed treatment with fungicides is a crucial link in the plant protection system, and systemic drugs give the best effect. Therefore, it is very important to develop scientific foundations for the preparation of complex preparations with a low rate of consumption of the active substance and the inclusion of plant growth regulators that enhance growth processes and the yield of the main crop. In recent years, the directions of modification of known and practiced fungicides by various methods, including methods of mechanochemistry, have been promising. The problem of creating both new substances and their effective formulations remains urgent. Taking into account the prospects and high efficiency of triazole fungicides in the system of complex plant protection, the creation of multicomponent seed protectants of grain crops is proposed. The purpose of this study was to develop preparations based on tebuconazole (TBC) and propiconazole (PPC) in the form of solid dispersions (SD) and to study their biological activity on spring wheat plants in the conditions of the Trans-Urals. At the same time, the retardant effect of these triazoles was also studied with the help of the domestic growth regulator Floroxan. The use of new preparations on spring wheat made it possible to reduce the damage to the culture by root rot by 85–87%, productive bushiness increased by 6–11% compared to the control without treatment. A reliable increase in crop yield of 2.2 c/ha or 14% was obtained using preparation 2 (TD of the composition TBC : PPC : AG : silica = 1 : 1 : 7 : 1 + Phloroxane when the polysaccharide (AG) and the auxiliary substance of silica are included in the composition). The inclusion of the growth regulator Floroxan in the composition of the mordant mixture reduced the antioxidant effect of tebuconazole and stimulated the growth and development of wheat seedlings. It was proved that such a biological effect was achieved in conditions of drought of varying intensity during the growing season of 2021–2022.

How Does Land Monopoly Reduce Consumption Levels? Evidence from China

Understanding the intrinsic relationship between land monopoly and a low consumption rate is of great significance for optimizing the national economic structure and reforming the land system. However, existing studies of low consumption ignore the role of the land system. This study, therefore, theoretically analyzed how a monopolistic land supply system inhibits consumption and empirically tested the causal and influencing mechanisms using the mediated effects model and provincial panel data from 2000 to 2017 in China. The results are as follows: (1) land monopoly significantly reduces the final consumption rate; the results remain robust under different model settings. (2) A heterogeneity analysis indicated that the negative effect of land monopoly on consumption is greater in the central and western regions than in the eastern regions; economic catch-up and government intervention increase such harm as well. (3) Under the land monopoly system, most land income flows to the public sector and urban areas, reducing the share of private sector income and expanding the urban–rural income gap, thus limiting private consumption and total urban–rural consumption. (4) During the 2000-2019 period, the expansion of monopolistic land transfers caused an additional 1.98 percentage points of decline in the final consumption rate, contributing 23.41% of the decline in the final consumption rate. Our findings provide new insights into the causes of low consumption and suggest that economic rebalancing can be achieved by breaking land monopolies through land supply-side reforms and land marketization reforms.

Ultra-low power resistive random-access memory based on VO2/TiO2 nanotubes composite film

In this study, a resistive random access memory (RRAM) based on VO2/TiO2 nanotubes was prepared. Compared with single VO2-based RRAM or TiO2 nanotube-based RRAM, the Ag/VO2/TiO2 nanotube/FTO RRAM device has advantages such as low power consumption (∼0.154 pJ), excellent stability (3000 DC cycles), and high switching rate (300 times). It still shows certain advantages compared with TiO2-based low-power RRAM (0.5 pJ). The device can also exhibit 20 consecutive long-term enhancement/suppression behaviors, which can be used to simulate brain-like activity and achieve recognition accuracy of 95% (8 × 8 pixels) and 88% (28 × 28 pixels) in artificial neural network identification field.

Microbiota influences host exercise capacity via modulation of skeletal muscle glucose metabolism in mice

The microbiota enhances exercise performance and regulates host physiology and energy metabolism by producing beneficial metabolites via bacterial fermentation. In this study, we discovered that germ-free (GF) mice had a reduced capacity for aerobic exercise as well as low oxygen consumption rates and glucose availability. Surprisingly, GF mice showed lower body weight gain and lower fat mass than specific pathogen-free (SPF) mice. Therefore, we hypothesized that these paradoxical phenotypes could be mediated by a compensatory increase in lipolysis in adipose tissues owing to impaired glucose utilization in skeletal muscle. Our data revealed that gut microbiota depletion impairs host aerobic exercise capacity via the deterioration of glucose storage and utilization. The improved browning ability of GF mice may have contributed to the lean phenotype and negatively affected energy generation. These adaptations limit obesity in GF mice but impede their immediate fuel supply during exercise, resulting in decreased exercise performance.

Application of the method of equivalent message encoding structures to simplify coding complexity

Formulation of the problem. Modern telecommunication technologies make it possible to transmit data over long distances with limitations in the form of low power consumption and low error rate using error correction codes. The use of such codes plays an important role and is necessary to detect and correct errors caused by signal distortion and noise in the communication channel. According to Shannon's channel coding theorem, the probability of error can be arbitrarily small or close to zero if the encoding rate of transmission R is less than or equal to the bandwidth of channel C. Assuming that the bandwidth C is achievable, we can calculate the minimum signal-to-noise power ratio (SNR) to achieve zero error, or an arbitrarily small error called the Shannon limit, while maintaining R ≤ C. This article discusses a method of applying equivalent message encoding structures to construct low-density parity-checking (LDPC) codes. Low-density parity-checking (LDPC) codes are a class of linear block codes in which the complexity of iterative decoding increases linearly with increasing block length. Standard LDPC codes without modifications are considered to demonstrate the effectiveness of the proposed method, which is expected to provide high encoding speed when transmitting messages with a short block length. The method of obtaining equivalent structures allows: to reduce the computational complexity of encoding and decoding; to provide the possibility of finding a new encoding scheme and evaluating its effectiveness. The validity of the method for obtaining equivalent message encoding structures is evaluated by modeling the bit error rate (BER) of LDPC codes. Purpose. to show the effectiveness of the use of equivalent structures for various methods of compression of transmitted information, to minimize the complexity of encoding, while maintaining energy efficiency, correcting ability and data transfer rate. Results. A method is considered for obtaining equivalent message element encoding structures that can be used to create more LDPC codes for data transmission applications with a short block length. The cascade principle of constructing an equivalent generator and a parity check matrix was analyzed, which also leads to minimizing the computational complexity of the encoder and decoder. An equivalent structure G can be obtained from cascading two (or more) matrices by modifying the second matrix so that it has a unit matrix with the size of the parity check length and a shift to the right by k bits. On the other hand, the equivalent structure H can be obtained by simply cascading directly the second matrix and shifting to the right by k bits. According to the simulation results, the proposed method is adequate, since LDPC codes have the same BER characteristics as codes based on the low density generator matrix (LDGM). During the simulation, it was concluded that the SPC codes (single parity check (single parity check (SPC)) are the most efficient codes (for a given block length), since SPC codes have the smallest interval up to the Shannon limit. Practical significance. The results presented in this article will give a new insight into the development of simple channel coding of LDPC codes of short block length with high encoding speed for future applications with lower power consumption.

Feeding and Reproductive Phenotypic Traits of the Sea Urchin Tripneustes gratilla in Seagrass Beds Impacted by Eutrophication

The sea urchin Tripneustes gratilla is a major grazer and is, hence, an excellent key model organism to study to gain a better understanding of responses to changes in its habitat. We investigated whether there are significant variations in the feeding and reproductive phenotypic traits of populations from three seagrass bed sites, with respect to their proximity to fish farms in Bolinao, northwestern Philippines. We established three stations in each of the three sites: the far, the intermediate, and those near the fish farms, and compared the sea urchins’ phenotypic traits and determined whether these were related to seagrass productivity and water parameters. Regardless of the sampling period, adult sea urchins (66.92 ± 0.27 mm test diameter, TD, n = 157) from the areas intermediate and near to the fish farms had significantly lower indices of Aristotle’s lantern, gut contents, gut and gonads, and lower gonad quality (high percentage of unusual black gonads), compared to those from the far stations. Multivariate analysis showed that the smaller feeding structures and gut, lower consumption rates and lower gonad indices and quality of sea urchins in the intermediate and near fish farms were positively related to lower shoot density, leaf production and species diversity, as well as lower water movement in those stations. The larger size of the Aristotle’s lantern in the far stations was not related to food limitations. More importantly, the phenotypic variability in the feeding structures and gonads of sea urchins in the same seagrass bed provides new evidence regarding the sensitivity of this species to environmental factors that may affect variability in food quality.

Amorphous gallium oxide homojunction-based optoelectronic synapse for multi-functional signal processing

In the era of accelerated development in artificial intelligence as well as explosive growth of information and data throughput, underlying hardware devices that can integrate perception and memory while simultaneously offering the benefits of low power consumption and high transmission rates are particularly valuable. Neuromorphic devices inspired by the human brain are considered to be one of the most promising successors to the efficient in-sensory process. In this paper, a homojunction-based multi-functional optoelectronic synapse (MFOS) is proposed and testified. It enables a series of basic electrical synaptic plasticity, including paired-pulse facilitation/depression (PPF/PPD) and long-term promotion/depression (LTP/LTD). In addition, the synaptic behaviors induced by electrical signals could be instead achieved through optical signals, where its sensitivity to optical frequency allows the MFOS to simulate high-pass filtering applications in situ and the perception capability integrated into memory endows it with the information acquisition and processing functions as a visual system. Meanwhile, the MFOS exhibits its performances of associative learning and logic gates following the illumination with two different wavelengths. As a result, the proposed MFOS offers a solution for the realization of intelligent visual system and bionic electronic eye, and will provide more diverse application scenarios for future neuromorphic computing.

Ultra-wideband CMOS power amplifier for wireless body area network applications: a review

&lt;span lang="EN-US"&gt;A survey on ultra-wideband complementary metal-oxide semiconductor (CMOS) power amplifiers for wireless body area network (WBAN) applications is presented in this paper. Formidable growth in the CMOS integrated circuits technology enhances the development in biomedical manufacture. WBAN is a promising mechanism that collects essential data from wearable sensors connected to the network and transmitted it wirelessly to a central patient monitoring station. The ultra-wideband (UWB) technology exploits the frequency band from 3.1 to 10.6 GHz and provides no interference to other communication systems, low power consumption, low-radiated power, and high data rate. These features permit it to be compatible with medical applications. The demand target is to have one transceiver integrated circuit (IC) for WBAN applications, consequently, UWB is utilized to decrease the hardware complexity. The power amplifier (PA) is the common electronic device that employing in the UWB transmitter to boost the input power to the desired output power and then feed it to the antenna of the transmitter. The advance in the design and implementation of ultra-wideband CMOS power amplifiers enhances the performance of the UWB-transceivers for WBAN applications. A review of recently published CMOS PA designs is reported in this paper with comparison tables listing wideband power amplifiers' performance.&lt;/span&gt;

Utilization of municipal solid waste incineration fly ash as construction materials based on geopolymerization

Incineration has been widely used to dispose municipal solid wastes (MSWs) with heat recovery. The generation of fly ash (FA, around 3∼5 wt% of the fed amount) that is normally defined as hazardous wastes remains a serious problem. It is ideal to work out a way to reutilize FA for valuable use instead of landfilling. As a novel utilization technology for municipal solid waste incineration (MSWI) fly ash, geopolymerization can produce geopolymer as construction materials with the advantages of low energy consumption, low pollution and high utilization rate. In this paper, metakaolin (MK) and washed fly ash (WFA) were used to prepare MSWI fly ash-based geopolymer (FAG) with alkali activator. Besides, the strength, heavy metals immobilization and acid resistance of FAG were in detail studied. Under the proper formulation, all the prepared FAGs exhibited strength higher than MU15 level (≥15 MPa) and the maximized one reached MU30 (≥30 MPa). Heavy metals including Cr, Mn, Cu, As, Pb, Zn and Cd had a immobilization rate of more than 92%, and others like As, Pb and Zn were nearly fully immobilized. As for the simulated testing for acid rain scenario, FAG could still fix up the heavy metals well indicating a controllable risk for the environment, which could be ascribed be its high acid neutralization capacity. In a word, this work reports a feasible method for treatment and resource reutilization of MSWI fly ash.

A meta‐analysis of how parasites affect host consumption rates

Parasites are known to mediate trophic interactions and can, for example, modify how consumers acquire resources. These modifications of host feeding behaviour can be imposed through three interconnected mechanisms affecting: 1) host food acquisition, 2) host food digestion or 3) host energy budgets. As a result, infected hosts may consume more, less or the same amount of food compared to their uninfected conspecifics. It is commonly assumed that infected hosts have lower consumption rates than uninfected hosts, but a comprehensive quantitative synthesis investigating the effects of parasites on host consumption rate has been lacking thus far. To fill this knowledge gap, we systematically searched for experimental studies that evaluated changes in consumption rate of infected vs uninfected hosts. In total, we extracted 158 effect sizes from 68 studies. We then performed meta‐analyses of mean differences in host consumption rates and their variation. The analyses were carried out for all taxonomic groups as well as separately for vertebrate and invertebrate hosts. The main‐effects meta‐analyses confirmed a generally negative effect of parasites on host consumption rates; infected hosts consumed on average 25% less food than their uninfected conspecifics. In addition, there was a significant increase in the variability in host consumption rate, on average by 25%, indicating that parasites can have variable effects on the foraging behaviour of their hosts. The meta‐regression models revealed that several moderator variables related to host and parasite characteristics influence host consumption rate. Experimental infection had a stronger influence on variance effects than natural infection. Parasitic infections reduced consumption rate of vertebrate hosts by 28% and thus more strongly than those of invertebrates, which were reduced by 22%. We conclude with recommendations to facilitate future ecological research syntheses on host–parasite interactions and beyond.

Constraint‐aware and multi‐objective optimization for micro‐service composition in mobile edge computing

AbstractAs a new paradigm of distributed computing, mobile edge computing (MEC) has gained increasing attention due to its ability to expand the capabilities of centralized cloud computing. In MEC environments, a software application typically consists of multiple micro‐services, which can be composed together in a flexible manner to achieve various user requests. However, the composition of micro‐services in MEC is still a challenging research issue arising from three aspects. Firstly, composite micro‐services constructed by ignoring the processing capabilities of different micro‐services may cause waste of edge resources. Secondly, edge servers' limitations in terms of computational power can easily cause service occupancy between composite micro‐services, severely affecting the user experience. Thirdly, in dynamic and unstable mobile environments, different edge users have different sensitivities to request latency, which increases the complexity of micro‐service composition. In order to improve edge resource utilization and user experience on micro‐service invocations, in this paper, we comprehensively consider the above three factors, and we first model the micro‐services composition problem in MEC as a constrained multi‐objective optimization problem. Then, a micro‐service composition optimization method M3C combining graph search and branch‐and‐bound strategy is proposed to find a composition solution set with low energy consumption and high success rate for multiple edge users. Finally, we perform a series of experiments on two widely used datasets. Experimental results show that our proposed approach significantly outperforms the four competing baseline approaches, and that it is sufficiently efficient for practical deployment.