Experimental Research on Belt Type of Precision Seed-Metering Device

2013 ◽  
Vol 712-715 ◽  
pp. 1339-1342
Author(s):  
Duan Yang Geng ◽  
Rui Cheng Du ◽  
Dao Lin Zhang ◽  
Li Dan
Keyword(s):  
Experimental Research ◽  
Work Performance ◽  
Spherical Shape ◽  
Good Work ◽  
Seed Plant ◽  
Working Process ◽  
Corn Seed ◽  
Belt Speed ◽  
Single Seed ◽  
Seed Metering Device

Based on the fact of low single seed plant rate, high seed damaged rate and low seed adaptability for conventional and mechanistic precision seed-metering device, a new belt type of seed-metering device was designed (patent No.20101020638.7). both of the 1/4 spherical shape and its size was first established by analyzing the working process of the seed-metering combination the material character of the tested corn seed, and the structure size 6mmX6mm of the seed scoop of this type of seed-metering was then determined by the frame test in agricultural lab, which was tested to own the good work performance. At last, the working adaptability tests were operated, the conclusion showed that the following character indexes were single seed plant rate 98.6%, repeated plant rate 6.3%, leakage plant rate 0.8% and seed damaged rate 0.05% when the size of seed-scoop is 8mmX12mm and the belt speed is1.05 m/s.

Simulation Analysis of the Working Process of the Corn Seed Metering Device with Combination Inner-Cell

2012 ◽  
Vol 215-216 ◽  
pp. 160-167 ◽  
Author(s):  
Qing Long Li ◽  
Ji Yang Yu ◽  
Qiang Qiang Zhang ◽  
Jian Qun Yu ◽  
Hong Fu
Keyword(s):  
Simulation Analysis ◽  
Three Dimensional ◽  
Bench Test ◽  
Particle Model ◽  
Test Results ◽  
Working Process ◽  
Corn Seed ◽  
3D Cad ◽  
Novel Method ◽  
Seed Metering Device

A three-dimensional discrete element method analytic model of the corn seed metering device with combination inner-cell was established based on its 3D CAD model, and the three-dimensional particle model of corn seeds was built by using the method of combination spherical particle. The working process of the corn seed metering device was simulated and analyzed by self-developed three-dimensional CAE software. It was observed that the simulative results of the seeding performance, clearing angles and dropping angles of the corn seeds well agreed with the bench test results. A novel method for studying and designing of the corn seed metering device was put forward.

Experimental Research on Cavitation Characteristics of a Novel Hybrid Journal Bearing

2013 ◽  
Vol 420 ◽  
pp. 74-77
Author(s):  
Ying Yang ◽  
Jing Hua Dai ◽  
Xu Li
Keyword(s):  
Experimental Research ◽  
High Speed ◽  
Work Performance ◽  
Journal Bearing ◽  
Rupture Zone ◽  
Oil Film ◽  
Rotating Speed ◽  
Supply Pressure ◽  
Experimental Rig

Under high and super high speed, the oil film of a journal bearing is easy to crack and then becomes cavitation. The existence of cavitation has a great effect on the work performance of the bearing. The cavitation mechanism of a spiral oil wedge journal bearing was investigated on the experimental rig. The effects of rotating speed and supply pressure on the cavitation shape of oil film and the number of cavitation strip in the rupture zone were analyzed. The results show that the cavitation shape of oil film is a long strip. The number of cavitation strip increases when supply pressure has been improved, and the location of oil outlet must be designed optimally.

Experimental Research on the Work Performance of Ceramisite Concrete with Mineral Admixture

2012 ◽  
Vol 204-208 ◽  
pp. 4026-4030
Author(s):  
Zhen Min Cao ◽  
Li Shan Li ◽  
Yan Wang ◽  
Wei Jun Yang
Keyword(s):  
Fly Ash ◽  
Experimental Research ◽  
Work Performance ◽  
Mineral Admixture

The mechanism of effect on work performance of ceramisite concrete with two kinds of mineral admixture is analyzed and also the each effect on ceramisite concrete with different dosage of fly ash and pulverized slag mixed with concrete, and when the two mixed together, the effect on work performance of ceramisite concrete with different dosage of the admixture is analyzed, it provides a better basis to ceramisite concrete mixing.

Experimental Study of Capacitance Sensors to Test Seed-Flow

2013 ◽  
Vol 347-350 ◽  
pp. 167-170 ◽  
Author(s):  
Yu Jing Sun ◽  
Hong Lei Jia ◽  
De Liang Ren ◽  
Jing Jing Yan ◽  
Yang Liu
Keyword(s):  
Parallel Plate ◽  
Device Performance ◽  
Capacitance Sensor ◽  
Corn Seed ◽  
Capacitance Variation ◽  
Sensor Structure ◽  
Key Techniques ◽  
Seed Metering Device ◽  
The Impact

The real-time seed-metering device performance detection is one of key techniques to ensure operation quality of a planter. A crossed E-shape plate capacitance sensor, a parallel-plate capacitance sensor and a differential tri-plate capacitance sensor, are proposed to test corn-seed flow. The detection concept and sensor structure parameters are presented. An adjustable stand is designed to investigate the impact of sensor structure and seed velocity on the outputs of capacitance sensors. The sensitivity and the feasibility of 3 sensors are studied by detecting capacitance variations at different corn-seed speeds. Experimental results show that, with average capacitance variation 0.1245pF and 0.1115 pF, respectively, the crossed E-shape plate sensor and the differential tri-plate sensor are suitable to measure corn-seed metering device performance.

Does Community Health Centers Have Contextual Effect on Midwife Performance in the Implementation of Prevention Mother to Child Transmission Counseling and Testing?

2020 ◽  
Author(s):  
◽  
Uki Retno Budihastuti ◽  
Endang Sutisna Sulaeman ◽  
◽  
◽  
...  
Keyword(s):  
Community Health ◽  
Community Health Centers ◽  
Work Performance ◽  
Health Centers ◽  
Contextual Effect ◽  
Good Work ◽  
Mother To Child Transmission ◽  
Child Transmission ◽  
Counseling And Testing ◽  
Mother To Child

ABSTRACT Background: Prevention mother to child transmission counseling and testing (PMTCT) service is primarily provided at health facility level. However, their full implementation requires strong linkages with communities. The purpose of this study was to examine contextual effect of community health centers on midwife performance in the implementation of PMTCT? Subjects and Method: This was an analytic observational study with a cross-sectional design. The study was conducted at 24 community health centers in Madiun, East Java, from August to September 2019. A sample of 184 midwives was selected by total sampling. The dependent variable was implementation of PMTCT. The independent variables were age, tenure, knowledge, training, work performance, and accreditation. The data were collected by questionnaire and analyzed by a multiple linear regression. Results: Implementation of PMTCT counseling and testing improved with tenure ≥8 years (b= 0.51; 95% CI= 0.15 to 0.87; p= 0.006), good knowledge (b= 0.61; 95% CI= 0.33 to 0.89; p<0.001), had trained (b= 0.41; 95% CI= 0.08 to 0.74; p= 0.014), good work performance (b= 0.56; 95% CI= 0.21 to 0.92; p= 0.002), and good accreditation (b= 0.49; 95% CI= 0.04 to 0.95; p= 0.031). Implementation of PMTCT counseling and testing reduced with midwives age ≥35 years (b= -0.51; 95% CI= -0.80 to -0.21; p= 0.001). Conclusion: Implementation of PMTCT counseling and testing improves with tenure ≥8 years, good knowledge, had trained, good work performance, and good accreditation. Implementation of PMTCT counseling and testing reduces with midwives age ≥35 years. Keywords: implementation, prevention mother to child transmission, work performance, accreditation Correspondence: Sringatin. Dolopo Regional Public Hospital, Madiun, East Java. Jl. Raya Dolopo 117, Dolopo, Madiun 63174, East Java, Indonesia. Email: [email protected]. Mobile: 081231683090. DOI: https://doi.org/10.26911/the7thicph.03.96

A Nonlinear Paradigm for Resilience, Workload, Performance, and Clinical Phenomena

2016 ◽  
Vol 9 (2) ◽  
pp. 509-516
Author(s):  
Stephen J. Guastello
Keyword(s):  
Theoretical Model ◽  
Clinical Outcomes ◽  
Experimental Research ◽  
Work Performance ◽  
Temporal Dynamics ◽  
Work Related

Research on resilience in the workplace is currently limited by at least two issues: an inconsistent documentation and choice of the stress-producing events and a singular construct of what constitutes resilience (Britt, Shen, Sinclair, Grossman, & Klieger, 2016). This commentary summarizes some recent experimental research that was possibly too new to have been included in the review and that offers some insights to both concerns. The research is predicated on a theoretical model that explains the role of resilience in either work-related or clinical outcomes and the temporal dynamics of work performance.

scholarly journals The Process of Operation of a Mobile Straw Spreading Unit with a Rotating Finger Body-Experimental Research

Processes ◽  
2021 ◽  
Vol 9 (7) ◽  
pp. 1144
Author(s):  
Boris Boltianskyi ◽  
Radmila Sklyar ◽  
Natalia Boltyanska ◽  
Larysa Boltianska ◽  
Serhii Dereza ◽  
...  
Keyword(s):  
Experimental Data ◽  
Energy Consumption ◽  
Experimental Research ◽  
Rotation Speed ◽  
Bedding Material ◽  
Working Process ◽  
Spreading Process ◽  
Unit Speed ◽  
And Performance ◽  
Working Bodies

This article presents methods and results of experimental research to determine the power consumed when driving the working bodies of the straw bedding mobile spreader to cover cow stalls (boxes). Analysis of the design and mode parameters of the rotary finger working body influence on the energy consumption of the bedding material spreading process is carried out. Using the experimental data, it was established that the power consumed to drive the rotary finger working body of the mobile straw bedding spreader, at the tractor power take-off (PTO) shaft rotation speed of 540 min−1, the forward unit speed of 2 km/h, and performance of 1.5 kg/s, is equal to 7.633 kW. In this case, due to the installation of a rotary finger working body for spreading straw bedding, the power consumption increased by 9%. This increase will not have a significant impact on the overall energy consumption of the spreading bedding material working process, because this class tractor power reserve allows its use.

scholarly journals Design and Simulation of a Garlic Seed Metering Mechanism

Agriculture ◽  
2021 ◽  
Vol 11 (12) ◽  
pp. 1239
Author(s):  
Huiping Guo ◽  
Yazhou Cao ◽  
Wenyuan Song ◽  
Jiao Zhang ◽  
Changlin Wang ◽  
...  
Keyword(s):  
Simulation Analysis ◽  
Discrete Element ◽  
Discrete Element Simulation ◽  
Simulation Test ◽  
Single Seed ◽  
Element Simulation ◽  
Unit Speed ◽  
Optimal Adjustment ◽  
Seed Metering Device ◽  
Qualification Rate

According to the agronomic requirements of garlic sowing, the garlic morphology is studied and a garlic seed metering mechanism with excellent seeding performance is designed. Based on this design, a new garlic seeding machine with an adjustable-size seeding device is developed to realize efficient single-seed metering and seeding of different varieties of garlic. Further, the design scheme of the garlic seeder prototype is established, with the key components of the garlic seeding being designed on the basis of the garlic seeding mechanism. To achieve garlic single-seed metering for different varieties of garlic, the optimal adjustment size of the garlic seed metering device is determined through discrete element simulation analysis. A field experiment confirms the effectiveness of applying the proposed garlic planter to field sowing in terms of the metrics of missing seed and multiple seed rates. The results of the discrete element simulation test reveal that an adjustment size of 40 mm yields the best single-seed metering performance. At an operating speed of 15–35 rpm, the metering device can achieve more than an 80% qualification rate of single-seed metering, with a unit speed of 0.628–1.465 m/s. Thus, the developed garlic seeding device meets the requirements of precision sowing in China and can effectively realize the mechanized planting of garlic.

scholarly journals Integritas Personal dan Kepemimpinan Etis

Humaniora ◽  
2014 ◽  
Vol 5 (2) ◽  
pp. 950
Author(s):  
Antonius Atosökhi Gea
Keyword(s):  
Ethical Leadership ◽  
Work Performance ◽  
Good Work ◽  
Leadership Performance ◽  
The World ◽  
Huge Impact ◽  
Personal Qualities ◽  
And Performance ◽  
Or Organization ◽  
The Relationship

Integrity is very important for a leader. When a leader does not have integrity, then, sooner or later it will destroy the group or organization s/he leads. This occurs because the policies, decisions, attitudes, and actions made by the leader will have wide impact to the organization. A leader will be the center of attention of the members, and whatever they see in her/him will have a huge impact on the organization as a whole. Integrity has been given a lot of meaning; and everything is interconnected, which essentially refers to one's personal qualities, which make a person trustworthy and reliable. In the world of work, integrity appears in the form of good work performance or results. To be able to produce a good performance it is necessary to have competence. With integrity possessed the competence can be directed to produce a good performance. The problem that occurs is a lack of understanding of the relationship between integrity and performance. Generally, they are both understood separately, as stand-alone. But in reality the integrity is manifested through good performance. This applies also to a leader, which results a good performance in implementing ethical leadership. The purpose of this paper is to outline the relationship between integrity and performance, in which competence plays an important role. Integrity is the foundation for leadership, which makes it able to run and produce ethical leadership performance. 

scholarly journals FORECASTING THE VIBRATIONAL STATE OF AN ELECTRIC PUMP AGGREGATE

2020 ◽  
Vol 3 (51) ◽  
pp. 19-25
Author(s):  
M. Sotnyk ◽  
V. Moskalenko ◽  
A. Sokhan ◽  
D. Sukhostavets
Keyword(s):  
Experimental Research ◽  
Vibration Velocity ◽  
Electric Pump ◽  
Centrifugal Pumps ◽  
Pressure Pulsations ◽  
Working Process ◽  
Blade Vibration ◽  
Pump Aggregate ◽  
Blade Frequency ◽  
Rms Amplitude

Purpose. The operation of electromechanical systems (EMS) in off-design modes and in which centrifugal pumps are used is accompanied by a number of negative factors, a special place among which is occupied by excessive blade vibration of the pump, which negatively affects its operational characteristics and causes a reduction in the service life of the main EMS units. Thus, an urgent task is to improve the operating characteristics of the pump as a component of EMS, which, by increasing the energy efficiency of the EMS working process and/or reducing the total cost of the life cycle of the pumps in their composition, will ultimately have a significant economic effect. Methodology. Experimental research of working process of an electric pump aggregate type D according to DSTU 6134:2009 and ISO 10816-3:2014. Results. Based on the experimental research results of vibration state of the pump D2000-100-2 bearing shell, which operates as part of the EMS, and the intensity of fluid pressure pulsations at its outlet, the limit root mean square value (RMS) of the pressure pulsation amplitude (∆Р ≥ 35,8 kPa and/or 3,4 % Н) is set at which an excess of the established ISO 10816: 3-2014 limit RMS of vibration velocity of the pump bearing shell ( V  2,8 mm/s ) and also is determined correlation coefficient ( / л k V Р ), which characterizes the RMS of the vibration velocity of the pump bearing shell at the blade frequency ( Vл ) depending on the RMS amplitude of the blade pressure pulsations (∆Р). Practical value. Since the number and systematic of experimental researches of the effect of pump parameters on the intensity of its blade vibration is complicated by the high cost of their implementation, therefore, it is advisable in further researches to use the RMS amplitude of blade pressure pulsations as an indirect indicator of the RMS vibration velocity of the pump bearing shell at the blade frequency. Conclusion. The intensity of pressure pulsations and influence of main parameters of the pump on their amplitude, with sufficient accuracy for engineering calculations can be determined by numerical modeling of the unsteady fluid flow in the flowing part of the pump. Figures 5, tables 2, references 10.

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