Average Daily Output Research Articles

Novel Workstation Module and Method for Automatic Blanking of Surgical Forceps

During the manufacturing of surgical forceps, the flashes of the blanks need to be removed. Manual production has problems such as high labor intensity, low efficiency, and high-risk factors. To solve this problem and realize fully automatic resection, a novel modular workstation was designed and a corresponding process method was proposed. The workstation adopts robots, non-standard automation equipment, and image recognition technology instead of manual loading and blanking, but the blank storage still needs to be performed manually. The critical components were selected according to the workstation design scheme and process method, and the control system design was completed. The reliability of the separation unit was studied through a test platform, and the failure problem caused by uneven force was solved using a blank locking device, which showed that the separation success rate was stabilized at 100%. The detection speed of the image recognition system can reach 100 ms/piece, and the product qualification rate can reach 95.7%. The advantages of the workstation in terms of output and productivity were further analyzed by comparing it to manual production, where the average daily output increased by 12.5% (4500 pieces). In addition, the results of long-term test experiments and power consumption comparison tests showed that the workstations are highly stable and consume little additional power.

Analysis of the Impact of Hydraulic Gates on a Stabilized Tidal Inlet Structure: Mathematical Model and Data Measurements

Tidal inlet structures are engineering projects with associated benefits related to flood control, water quality enhancement, and coastal protection. This study analyzes the performance of hydraulic gates on a stabilized inlet in estuarine systems by developing a simplified hydraulic model that considers inlet and outlet water levels. The proposed model was applied to the stabilized tidal inlet structure in Cartagena de Indias, Colombia. This model offers a practical tool for engineers and designers operating estuarine systems. The analysis focuses on the coastal lagoon of Ciénaga de la Virgen. The proposed model was successfully calibrated using two water sensors, with extreme input and outlet flow rates of approximately 260 m3/s and 110 m3/s, respectively. The average daily output volume in the system is 3,361,000 m3, while the average daily input volume is 3,200,000 m3. Consequently, the manipulation of the opening gates results in a decrease in the estuarine water level, potentially by as much as 25 cm, which local authorities can use to make decisions to reduce extreme water levels during flooding events.

Feeding live or inactive yeast to primiparous Jersey cows: nutrient digestibility, rumen fermentation, and milk fatty acid profile

ABSTRACT The aim of this study was to evaluate the effects of live yeast (LY) or inactive yeast (IY) on intake and apparent total-tract digestibility of nutrients, ruminal fermentation, milk yield and composition, milk fatty acid profile, N utilisation, and microbial protein synthesis of primiparous Jersey cows. Twelve primiparous Jersey cows were employed, with an average body weight of 403 kg, a lactation period of 100 days, and average daily milk output of 14.7 kg. The experimental diets were: 1 – CON (no additives); 2 – LY (inclusion of 40 g/day of live yeast); 3 – IY (inclusion of 40 g/day of inactivated yeast wall). Cows fed LY exhibited the greatest DM intake. Cows’ intake IY had the greatest digestibility of DM, OM, and NDF. Feeding IY reduced ruminal concentrations of acetate, isobutyrate, and branched-chain fatty acids. Cows fed either LY or IY increased the production of milk and FCM. Cows under the LY treatment had greater milk fat content. Cows fed LY had the greatest N intake. Yeast treatments also increased the absorbable purine estimation. Supplementing primiparous dairy cows with yeast products, especially live yeast, improved dry matter intake by positively influencing digestibility, particularly for starch and NDF.

A reconfiguration method for photovoltaic array of stratospheric airship based on multilevel optimization algorithm

Reducing the mismatch loss to increase the output power of the photovoltaic (PV) array is crucial for extending the flight time of stratospheric airships. This paper presents a reconfiguration system for PV arrays based on a switch matrix designed for stratospheric airships. The proposed system employs a multilevel optimization reconfiguration algorithm that combines smart choice, greedy, and Munkres' assignment algorithms. Simulations were conducted under single working conditions, full-day sunlight cycles, and full-year PV array reconfigurations, respectively. The results demonstrated that the reconfigured PV array significantly improved the output power with a smooth PV curve. The instantaneous power under extreme working conditions could be increased by 50.1%. Furthermore, during the 7-day simulation process, the average daily power output of the PV array increased by 14.68%, whereas the output fluctuation during circular cruising was reduced. The reconfiguration system offers greater advantages during months with weak irradiance in high-latitude regions, where the daily output power of the PV array can be increased by up to 24.46%. This significantly reduces the installation area and weight ratio of a stratospheric airship PV array.

Analysis and prediction of the penetration of renewable energy in power systems using artificial neural network

The curtailment of renewable energy worsens with increasing penetration in power systems, so it is necessary to explore the upper limit value of the penetration of renewable energy (PRE). This paper uses artificial neural networks (ANN) to study the historical data of California independent system operator (CAISO), analyze the fluctuation balance strategy of wind and solar power, and predict the upper limit value of the PRE, which will peak at 40.5% in 2025. In addition, this paper also simulates the inclusion of energy storage unit (ESU) with an installed capacity of 3 GWh in the grid to reduce curtailments, and analyzes the grid operating conditions and the upper limit value of the PRE, showing that the storage units with an installed capacity of only 3% of the average daily power output of solar energy recover 58% of the annual curtailments (2021), and the maximum PRE is 41.2%.

Study on Improving the Processing Efficiency of Mixing Production Line

In order to improve the processing efficiency of the mixing production line and enhance product competitiveness, lean Six Sigma method is adopted to solve the faults that affect the output efficiency of the mixing production line according to the DMAIC path, which can assist workers to increase the average daily output of product processing from 1.3 to 2.6 units. Lean Six Sigma method can deeply analyze the production faults of the hybrid production line and effectively solve the problem of product production efficiency.

Self-cleaning coatings for minimizing the impact of dust precipitation on the power production of solar cells utilizing mesoporous TiO2/SiO2 and ZnO/SiO2 films

The production of customized site-specific anti-soiling nanocoatings is needed for better utilization in dry parts of the world, with consideration of natural dust fallout in those regions. Kuwait's atmosphere carries airborne dust 70% of the year. Thus, designing anti-soiling nanocoatings for the arid region is necessary when dusty atmospheres are considered the norm. In this contribution, all solar cells were coated by SiO2, ZnO/SiO2, and TiO2/SiO2 films for self-cleaning applications and were tested in the summer period with the high level of dust and temperatures the current, voltage and power output was measured. We directly relate the coatings' performance to the electrical power output of the coated solar cells, which is considered among the few studies in this field. Influences of properties ZnO/SiO2 and TiO2/SiO2 films, such as the surface morphology, transparency, and water contact angles on the power production efficiency of solar cells, were systematically investigated. The three fabricated films showed a contact angle of about 70o agrees with the expected hydrophilicity behaviour. The thickness values of SiO2, TiO2/SiO2 and ZnO/SiO2 films were found to be ∼35, 205 and 240, respectively. Transmission values of the synthesized SiO2, TiO2/SiO2 and ZnO/SiO2 films were determined at about 97.95, 96.62 and 96.25%, respectively, suggesting that all synthesized films are highly transparent over the visible range. Solar cell samples were subjected to natural conditions for 30 days in the summer. The results indicated that the effect of dust on the power production efficiency for ZnO/SiO2 and TiO2/SiO2 coated PV cells was lower than the solar cells coated with SiO2 film concluded from the low power output of 0.16 Watt for this coating compared to 0.18 and 0.2 Watts for the other two coatings. The mesoporous ZnO/SiO2 and TiO2/SiO2 films not only significantly minimized the accumulation of dust on the PV cells but also boosted the power-generating efficiency. The average daily power output of around 0.2 Watt and the deviation values of the soiling ratios of about 5% showed that TiO2/SiO2 film was a durable coating against dust for the presented experiment time, while the ZnO/SiO2 film started as good, but showed deterioration after six days of the experiment with a deviation in SR value reached 15%. The TiO2/SiO2 nanocoating showed consistent behaviour with lower deviations for soiling ratio (SR) values and constant average power output for the solar cells concluding good durability in solar cells tests during harsh conditions in the summer, implying the excellent service life of solar cells.

THE EFFECT OF THE TYPE OF BODY BUILD OF COWS ON THEIR MILK OUTPUT AND MILK QUALITY

The presented article gives the results of evaluation of the body build type of firstling cows of Ukrainian black and white dairy breed, there are determined the influence of linear features of body build and udder on their milk output and quality and also the relations between these indicators in the form of regression equations. It was revealed that the average daily milk output of cows had a probable correlation influence with height, body depth, width of loin, rear udder attachment, central ligament, udder depth. Average milk fat content had a probable correlation with rear udder attachment and central ligament, while average protein content had a probable correlation with their height, chest width, body depth, butt width and front udder attachment, indicating a weak positive correlation between these parameters. A probable correlation between the average somatic cell content and the linear estimate of body type indicators was found only with the estimate of udder depth, central udder ligament and posterior dugs position. In the course of the research it was revealed that the average daily milk output of firstlings was likely influenced by the following attributes of linear estimation of the type of body build: height, breast width, angularity, butt width, posterior attachment of udder, udder depth, central ligament and posterior dugs location. By the results of the researches the regression model of prognostication of the average daily milk output of the firstling cows by the values of the linear estimation of the body build type of the cows is developed, that will allow making the decision on expediency of their further utilization in the second month of lactation. The proved models for predicting fat and protein content percentages in milk should be used for evaluation of firstling cows as auxiliary ones. There were created the models for prediction of number of mastitis cases in firstlings and content of somatic cells in milk on the basis of values of indicators of linear estimation of body type of cows. Keywords: dairy cows, body build, linear estimate, daily output, fat and protein content percentages, somatic cells, regression model.

Active Drainage versus Passive Drainage after Modified Radical Mastectomy in Patients with Breast Carcinoma: A Randomised Controlled Trial

Introduction: Postoperative seroma formation is a common complication following Modified Radical Mastectomy (MRM), with an incidence ranging from 15-60%. There is a hypothesis that the negative pressure created by the suction drain used in MRM opens the damaged capillaries, preventing them from spontaneously closing and thereby increasing postoperative secretions. Aim: To compare active suction drains with passive drains in MRM in terms of postoperative outcomes. Materials and Methods: A randomised controlled trial with two arms, consisting of 15 patients in each arm, was conducted from November 2018 to March 2020 at the Atal Bihari Vajpayee Institute of Medical Sciences and Dr. Ram Manohar Lohia Hospital in New Delhi. Patients diagnosed with localised breast carcinoma and scheduled for MRM were invited to participate. Pregnant females, patients with metastatic disease, those lost to follow-up, recurrent breast cancer patients, and those taking anticoagulants and antiplatelet agents were excluded from the study. The outcomes measured were drain output and duration of hospital stay, and postoperative morbidity, including flap necrosis, surgical site infection, seroma, and volume of seroma aspiration. The data acquired was analysed using the Statistical Package for Social Sciences (SPSS) version 21.0. Quantitative variables were compared using the Independent t-test and Mann-Whitney test as appropriate. Nominal categorical data was compared using the Chi-square or Fisher’s-exact test as appropriate. Results: Drain output was higher in the active group than in the passive group, but there was no significant difference in the average daily drain output and the average total output (652 mL versus 540 mL), except for the first two postoperative days. There was no statistically significant difference between the two groups in terms of hospital stay (6.67 days and 6.27 days), duration of drains in situ (6.67 days and 6.27 days), flap necrosis (13.3% vs. 13.3%), seroma formation (26.67% vs. 20%), and surgical site infection (26.67% vs. 20%). Conclusion: The use of suction in drains during MRM surgery is not compulsory and can save costs in resourcepoor settings. However, larger sample size studies with multicentre participation should be undertaken before making any recommendations.

Herd and animal factors affect the variability of total and differential somatic cell count in bovine milk.

The aim of this study was to quantify some environmental (individual herds, herd productivity, milking system, and season) and animal factors [individual animals, breed, days in milk (DIM) and parity] on the variability of the log-10 transformation of somatic cell count (LSCC) and differential somatic cell count (DSCC) on individual bovine milk. A total of 159,360 test-day records related to milk production and composition were extracted from 12,849 Holstein-Friesian and 9,275 Simmental cows distributed across 223 herds. Herds were classified into high and low productivity, defined according to the average daily milk net energy output (DMEO) yielded by the cows. Data included daily milk yield (DYM; kg/d), milk fat, protein, lactose, SCC, and DSCC, and information on herds (i.e., productivity, milking system). The daily production of total and differential somatic cells in milk was calculated and then log-10 transformed, obtaining DLSCC and DLDSCC, respectively. Data were analyzed using a mixed model including the effects of individual herd, animal, repeated measurements intra animal as random, and herd productivity, milking system, season, breed, DIM, parity, DIM × parity, breed × season, DIM × milking system and parity × milking system as fixed factors. Herds with a high DMEO were characterized by a lower content of LSCC and DSCC, and higher DLSCC and DLDSCC, compared to the low DMEO herds. The association between milking system and somatic cell traits suggested that the use of the automatic milking systems would not allow for a rapid intervention on the cow, as evidenced by the higher content of all somatic cell traits compared to the other milking systems. Season was an important source of variation, as evidenced by high LSCC and DSCC content in milk during summer. Breed of cow had a large influence, with Holstein-Friesian having greater LSCC, DSCC, DLSCC, and DLDSCC compared to Simmental. With regard to DIM, the variability of LSCC was mostly related to that of DSCC, showing an increase from calving to the end of lactation, and suggesting the higher occurrence of chronic mastitis in cows toward the end of lactation. All the somatic cell traits increased across number of parities, possibly because older cows may have increased susceptibility to intramammary infections.

An Assessment of Biomedical Waste (BMW) Production and Management and its Impact on the Environment and Disease Transmission Amidst the COVID-19 Pandemic in the Philippines

The study aimed to analyze the impact of pandemic-related BMW production and management in the Philippines and its potential role in transmitting the COVID-19 virus via a mixed-methods analysis of data from surveys of different sectors (consumers of medical waste, deliverymen, and medical workers) and using secondary sources. The results revealed that the most common types of PPE used in the country are disposable face masks and face shields, wherein all respondents reported an increase in the consumption of medical materials. An improper disposal of an estimated 85 million disposable face masks and 50 million face shields in the Philippines poses a serious threat to the environment and health in the Philippines, a biodiversity hot spot. There was a strong correlation between the increased exposure to BMW and laxer degrees of implementation of proper BMW disposal practices. The paper also established an estimated consumption of ≈ 120.5 million face masks, ≈ 71.4 million face shields, ≈ 38 million disposable gloves, and ≈ 4.1 million full-body suits per day in the Philippines. The actual output of biomedical waste in the country drastically increased in a year, comprising an average daily output of 3,390 tons of BMW (≈ 482 tons for face masks, ≈ 2,544 tons for face shields, ≈ 198 tons for disposable gloves, and ≈ 167 tons for full-body suits which is an important discovery regarding the biomedical waste in the country. These estimates were found to be higher than those reported by the Asian Development Bank in 2020. All sectors reported low awareness levels and confidence in the country's effectiveness in implementing current BMW management practices.

Portable Solar Charger System with Energy Measurement and Access Control

The utilization of green energy is one trending issue in the current time. People try to increase the portion of energy gained from renewable sources such as wind, solar, hydro, and geothermal energy. In this paper, the authors propose a portable solar charger system (PSCS) that can be used to charge cellular devices when electricity access is not available such as during a power shutdown or when traveling to remote locations. The PSCS is made compact in two parts: the solar panel and the utility box, making the whole system easy to carry. The energy obtained from the solar panel is stored in a dry battery, with the process carefully regulated by a solar charge controller. The PSCS is equipped with passcode protection and gained energy monitor. The electric current from the battery flows to the load through a DC-DC converter and a relay only if a correct passcode is entered via a keypad. The amount of gained energy by the solar panel is monitored by measuring the voltage across the panel and the current flowing through its circuit. The functionality of the PSCS is successfully tested. Eight experiments each with a 3-hour duration are conducted on 6 different days. The amount of gained energy varies from 5.26 Wh to 9.88 Wh (1,300 mAh to 2,670 mAh), which corresponds to 14.5 % and 31.5 % of the potential average daily output energy for the location of Cikarang, Indonesia.

Naturalistic social cognitive and emotional reactions to technology-mediated social exposures and cortisol in daily life

The emotional and social evaluative aspects of social interactions influence cortisol. The interactions that mothers have on social networking sites and via other technology involve heightened social comparison and emotion. We examined the associations between technology-mediated social engagement, social comparisons and emotion during technology-mediated social exposures (TMSEs), and cortisol during daily life. Forty-seven mothers (mean age = 34.38) completed a 4-day monitoring period involving four saliva collections and questionnaires daily at awakening, 4 h post-awakening, 9 h post-awakening, and bedtime. Higher social comparison during TMSE was associated with lower momentary cortisol, whereas higher negative emotions during TMSE and more time spent in TMSE were associated with higher momentary cortisol. Higher average social comparison during TMSE was associated with lower average daily cortisol output (area under the curve with respect to ground; AUCg), and more time spent on TMSE was associated with higher average AUCg. This study presents the first evidence that naturalistic social-cognitive and emotional reactions to TMSE are associated with cortisol in daily life.

SECURITY SYSTEM FOR AGRICULTURAL MACHINERY AT RAILWAY CROSSINGS

It is shown that there are more than 7,000 official unregulated railway crossings in the Russian Federation. A high level hazard of such facilities is especially emphasized. It is noted that the use of automatic traffic control at railway crossings results in a 10-times decrease in the accident rate. (Research purpose) To develop a system of power supply, alarm and blocking to regulate the movement of agricultural machinery at temporary, spontaneous, seasonal and service railway crossings located in decentralized areas. (Materials and methods) It is proposed to use renewable energy sources, solar, wind or hydraulic. The advantages of solar energy are substantiated for the power supply system, signaling and blocking a temporary railway crossing. (Results and discussion) The use of a solar power supply system is proposed, since an average daily output of a solar power plant is 2.0-2.5 times higher compared to a wind power plant of similar capacity. The developed power supply system uses constant voltage of 24 Volts, permitted on the railway infrastructure. An electrical circuit of the control unit for the alarm and blocking system and the algorithm for its operation were developed. To obtain information about a train approaching the crossing, a vibration sensor was created and examined. The reliability of the alarm and blocking system is proved for a 2000-meter electric line. (Conclusions) To regulate crossings, a system of power supply, alarm and blocking was developed for the intersection of automobile and low-intensity railways located in areas remote from centralized electrical networks. For light signaling and blocking of long electric lines, a vibration sensor was made and examined. The sensor transmits a signal about a train passing to the control unit, which operates on a circuit at a vibration velocity of 3.5 millimeters per second. A booster power supply was created and tested for long electric lines, remotely located barrier traffic lights (at a distance of 2 kilometers before the crossing), operating on renewable energy sources.

Thermal Characteristics and Parametric Analysis of an Improved Solar Wall

Solar air collectors installed on buildings can significantly reduce conventional energy consumption in winter and summer. However, some problems arise in the utilization process, such as overheating, inconvenient operation control and low energy efficiency, etc. This work is a parametric analysis focusing on the automatic control and thermal efficiency improvement of the solar wall. An improved color-changing solar wall integrated with automatic control components, such as a photoelectric fan and temperature-controlled damper, was proposed in this paper. Based on the experimental data, the average daily heat output of the color-changing solar wall is 1.08 MJ per unit floor area on clear days in winter and the average thermal efficiency is 56.8%. Meanwhile, a quantitative analysis was carried out based on monitoring experiments for evaluating the thermal characteristic of automatic control components. Furthermore, in order to improve the thermal performance of the solar wall, parametric analysis was performed by numerical simulation. Results from this paper can provide a theoretical basis for the application of solar air collectors in modern buildings.

New solar still with energy storage: application to the desalination of groundwater in the Bou-Ismail region

Abstract This study aims to develop efficient desalination equipment that increases the distilled water production rate and enhances heat transfer in the evaporator. It focuses on the impact of equipment geometry and energy storage during the daytime and nocturnal period. In addition, the effects of the energy storage system, which is placed in two specific areas on the yield of the distillation process with and without energy storage, have been studied. The heat exchanger system provides the energy to the water to be treated in the daytime, while the concrete part provides the energy storage in the desalination evaporator at night time. The experimental test results showed that the increase of distilled water through the heating system is very important in comparison to the productivity of the conventional solar still. The obtained results indicate that the use of energy storage increases productivity by 50% in the nocturnal period. Indeed, the daily productivity of the concrete solar still, strongly affected by the heat transfer produced via concrete to the water evaporator, is presented in this study. It was found that the average daily distillate output of concrete solar still with energy storage is more significant than that of a solar still without energy storage.

Performance analysis and evaluation of a 10.6 kWp grid-connected photovoltaic system in Serpong

The grid-connected Photovoltaic (PV) System was installed in the rooftop of Energi Building, PUSPIPTEK in 2017 located in Serpong, South Tangerang. The System consists of 40 modules @265 Wp, a 10 kWh battery system, and a 10250 kW grid-tie inverter. This study presents the performance analysis of the PV system based on the eight-months monitored data from July 2019 to February 2020. The evaluated parameters of the PV system include yields, performance ratio, capacity factor, energy efficiency, and average daily energy output of the PV system. The results show that the average value of the performance ratio and capacity factor during the eight-months monitored period were 82.42% and 14.07% with average values of the array (Ya), final (Yf ) and reference (Yr ) yields were 3.49 kWh/kWp/d, 3.38 kWh/kWp/d, and 4.12 kWh/kWp/d, respectively. Meanwhile, the average daily energy output of the PV system during the eight-months monitored period was 36.92 kWh per day with the average values of the module (ƞPV), system (ƞsys), and inverter (ƞinv ) efficiency was found to be 15.29%, 14.77%, and 96.63%, respectively. Compared with previous studies in the literature, these results indicated that the grid-connected PV system installed in Energi Building PUSPIPTEK Serpong exhibited good performance.

Effect of number of collectors (N) on the environment due to single slope solar desalination unit coupled with N identical evacuated tubular collectors

This research paper talks about the investigation of the effect of number of collectors on the environment due to single slope solar desalination unit (SSSDU) coupled with N identical evacuated tubular collectors (N-ETC). The analysis is observed for typical days of May and December for the atmospheric situation of New Delhi with the help of analytical program fed in MATLAB. The average daily energy output has been estimated followed by the evaluation of amount of carbon mitigated and enviroeconomic parameter for various values of N at selected value of flow of fluid mass per unit time. The input data required for the numerical computations have been taken from IMD, Pune, India. It has been observed that the value of environmental cost or enviroeconomic parameter increases with the raise in the value of N at selected value of fluid flow mass/unit time.

P104 SELECTIVE LYMPHATIC EMBOLIZATION TO MANAGE SEVERE POSTOPERATIVE LYMPHATIC LEAK

Abstract Aim To describe methods and clinical outcomes in a cohort of patients at Uppsala University Hospital who underwent selective lymphatic embolization due to severe lymphatic leak. Background & Methods Surgery for malignant disease with extensive lymph node dissection in the abdomen or thorax can be complicated by postoperative lymphatic leak. This is a relatively rare condition, associated with great morbidity and can be difficult to treat. Selective embolization of leaking lymphatic vessels is a recently introduced method for management of thoracic and abdominal lymphatic leaks. Patients that had undergone treatment with selective embolization for severe lymphatic leaks were studied retrospectively. Lymphatic leaks were diagnosed with dynamic contrast enhanced magnetic resonance imaging (MRI)-lymphangiography and/or nodal lymphangiography utilizing Lipiodol. Selective embolization of leaking lymphatic vessels was performed in local anesthesia through transabdominal access, selective catheterization of lymphatic vessels with microcatheters, followed by occlusion of the vessel with coils and glue. Alternatively the leaking lymphatic vessel was occluded by injection of Lipiodol or Fibrovein via an adjacent lymph node. Data was analyzed with descriptive statistics. Results The study comprised 14 patients with severe postoperative lymphatic leak (six following transthoracic esophageal resection and eight following abdominal resections). Prior to intervention the average daily lymph output was 2092 ml and average serum albumin was 19 g/l (range 7-27). Median time from primary surgery to selective embolization was 73 days indicating that conservative treatment had previously been tried and failed. Selective embolization was successful in 93% (n=13) and in nine patients the lymphatic leak ceased instantly. A few patients needed more than one embolization procedure. Median time in hospital care after embolization was two days. No procedure-related complications occurred and only one patient later needed open surgery due to persisting lymphatic leakage. Conclusion Selective lymphatic embolization appears to be a safe and effective method with potential to preclude open surgery in patients with persistent severe postoperative lymphatic leak. The procedure can be performed under local anesthesia but demands a highly skilled and dedicated interventional radiologist. The most detailed imaging to facilitate the procedure was achieved through dynamic contrast enhanced MRI-lymphangiography.

Experimental analysis of factors influencing the development effect of multilayer gas well

Sulige gas field is characterized by complex pore structure, poor reservoir properties and low output of single-layer production. Therefore, in order to obtain higher economic profit, multi-layer commingling development is adopted in this type of gas field. According to the basic characteristics of the upper Paleozoic reservoir in Sulige gas field, there is a positive correlation between the output contribution rate of each production layer and its physical parameters and effective thickness. In order to directly analyze the inter-layer output law and its influencing factors of gas wells, a variety of formation models are designed, and the experiment of single-layer development and multi-layer combined development is carried out. It is found that permeability and original formation pressure are the main factors affecting the development effect of multi-layer well. The original formation pressure has the greatest influence on the ultimate recovery, while the permeability has the strongest influence on the average daily output and the yield contribution rate of productive layer. According to the similarity theory, the mathematical model between the gas productivity index per meter per well and permeability is fitted. Finally, the mathematical model is applied to 18 gas wells of the S-af area of sulige gas field, and the calculation accuracy reaches a high level. The validity and practicability of the formula is verified, which can provide the basis for subsequent production.