bluuebunny/crossref_metadata_2025 huggingface dataset:
Effect of Beet Molasses as A Source of Energy on Performance of Broiler Chickens
Authors: Abdelgader M , Haren H I H , Ismoyowati  , Iriyanti N
Published: November 2019

Molasses can be a source of quick energy and an excellent source of minerals for farm animals and even chickens. Molasses can also be a key ingredient for cost effective management of feeds. The purpose of this research was to study the impact of adding different levels of sugar beet molasses to feed on performance of broilers chickens. Used 112 of commercial broiler (Ross 308) l-day-old chicks were weighed in gram live weight ranged between 50-57g and subsequently placed in the treatment groups in such a way that the mean weights differed as little as possible, chicks divided into four groups replicates of 7 chicks each and reared on deep litter in open housing system. Four replicates were designed to each dietary treatment. at 15-days-old chicks, the unsexed broiler chickens were randomly allotted to four groups of 7 birds each. The four diets consisted of Group (A) as a control diet containing no Molasses, Group (B) was 5 %, Group (C) 7.5 % and Group (D)10%. Feed and water were provided ad libitum. There were no significant differences at all level (P>0.05) of adding beet molasses as source of energy among four experimental groups for the parameter studied: body weight, body weight gain, feed intake and feed conversion, also there is no mortality however, Use of beet molasses in broiler diets reduced feed cost and feeding of 7.5 % beet molasses decreased cost of feed per kg versus control and increase profitability.
Comparable Results between Continuous and Sequential Media on Mouse Embryo Cultured in Time-Lapse Incubator
Authors: Pangestu Mulyoto
Published: November 2019

Time lapse incubator now became a new technology for clinical In Vitro Fertilization. This incubator allows embryo observation continuously and periodically without taking the embryo out from the incubator. The nature function of time lapse incubator requires continuous incubation without taking out the embryo from the incubator, means there is no change over media during incubation. In the other hand most culture media that available in the market distinguish between cleavage and blastocyst stage embryo. This known as sequential media. This experiment compared the use of continuous and sequential media during in vitro embryo culture using time lapse incubator. One cell mouse embryo derived from F1 (C57BL/J MARP x CBA/MARP) were used in this experiment. Embryos were culture for 5 days until they reach blastocyst stage. The continuous media (Global Media, Life Global) was used to culture media from day 1 till day 5, while sequential media were divided into two parts. Cleavage media (SIVF-Cleavage, Cook Medical, Brisbane) was used from day 1 till day 3, and Blastocyst media (SIVF-Blastocyst, Cook Medical, Brisbane) was used from day 3 till day 5. Control embryos were cultured in sequential media (SIVF- Cleavage and SIVF-Blastocyst, Cook Medical) in bench top incubator (MINC, Cook, Brisbane). A total of 320 one cell embryos were used in this experiment. Embryo development was evaluated by the number of embryo developed into blastocyst.
Calpain Activity of Jawarandu Does under Four Different Energy Level in the Ration
Authors: Socheh M , Priyono A , Haryoko I , Purwaningsih H
Published: November 2019

The aim of the research is to investigate the effect of four different energy level in the ration into the calpain activity of Jawarandu does. The research was done during 5 months in the Experimental Farm of the Faculty of Animal Science, Universitas Jenderal Soedirman. The research material used was 16 heads of the Jawarandu doe with the aged 2.5−3 years. All the animals were randomly assigned to the ration treatment which forms four the different energy levels (82.26% TDN, 85, 87.93, dan 90.74% TDN). The replication of each treatment was four times. Variable measured was a calpain activity on the muscle of Longissimus dorsi. General linear model (GLM) of the SPSS was used to analysis variable measured. Energy content 1.63McalME/heads/day and 1.92McalME/heads/day as well as 1.73McalME/heads/day and 2.06McalME/heads/day were increased of the μ-calpain and m-calpain activities at the Longissimus dorsi muscle, respectively. However, there was decreased of the calpastatin activity at the Longissimus dorsi muscle. Different energy content of the ration increased the μ-calpain and m-calpain activities at the Longissimus dorsi muscle and of those decreased calpastatin activity.
The Effect of The Levels of Liquid Organic Fertilizer from Traditional-Market Waste on The Production and Nutrient Contents of Setaria Grass
Authors: Hendarto E , Bahrun  , Hidayat N
Published: November 2019

Tradidional-market waste liquid organic fertilizers can be used to fertilize setaria grass (Setaria splendida Stapf). This research was conducted to get information concerning the best dosage of liquid organic fertilizer utilization. An experimental method using Completely Randomized Design was applied in this study. The treatments were: 6 (six) doses of mixtures of the liquid organic fertilizer : water, of the ratios of 0:0, 1:1, 1:2, 1:3, 1:4, and 1:5, volume by volume, each of which was repeated 4 times. The land area used was 2 m x 1.5 m per plot (experimental unit). The variables measured were the dry matter (DM) concentration, DM production, crude protein (CP), crude fat (CFt), and crude fiber (CFb) contents. The data used were the results of the harvest at second defoliation. The results of the study showed that the doses of water in the fertilizer did not indicate any significant differences on all variables being studied. On the basis of the results, it is suggested that the addition of water into the fertilizer can be applied up to 5 folds the volume of the organic liquid fertilizer in the agronomy management of Setaria grass.
The Concentrate to Forage Ratio of Complete Feed Silage on Nutrient Consumption
Authors: Munasik  , Suparwi  , Prayudi I , Umam R Z
Published: November 2019

The aimed of this research to examine the effect of the concentrate to forage ratio of complete feed silage on crude protein, crude fiber, TDN and fat consumptions. Five types of the ensilage of complete feed treatments consisted of T1 = concentrate 26% + A + Napier grass 70%, T2 = concentrate 36% + A + Napier grass 60%, T3 = concentrate 46% + A + Napier grass 50%, T4 = concentrate 56% + A + Napier grass 40% and T5 = concentrate 66% + A + Napier grass 30%, that is A = (molasses 1,5% + urea 0,5% + salt 0,5% + mineral mix 1,5%). Twenty of local male sheep with a body weight 12.5 – 22.5 kg divided into 4 blocks were used in this experiment. The parameters measured were the consumptions of crude protein, crude fiber, TDN and fat. The results showed that treatment had highly significant effect (P <0.01) on consumptions of crude protein, crude fiber, and TDN, but had a significant effect (P<0.05) on fat consumption. The conclusion of this study that the P3 treatment is the best concentrate to forage ratio of complete feed silage for fattening because it has the highest consumptions of crude protein 131.01 ± 4.05, crude fiber 103.06 ± 3.33, TDN 655.80 ± 18.74 and fat 55.84 ± 1.83 gram/day/head.
The Comparison of Financial Performance among the Broiler Duck Farming Based on Farm-Scales at Banyuwangi Regency of Indonesia
Authors: Utami H D , Purwanita E
Published: November 2019

Study was held at Banyuwangi Regency, East Java of Indonesia. The research aimed to investigate financial performance of the broiler duck farming based on farm-scales. 10 respondents who joining in farmer group were obtained by multistage sampling method that categorized into three farm-scales namely, small-scale (having 200-1,266 birds, n = 6), medium-scale (controlling 1,266-2,533 birds, n = 2) and large-scale: rearing more than 2,533 birds, n = 2). Data were collected during one year with six production periods. Analysis data involved profit, break-even point (BEP), R/C ratio, and rentability. Results discovered that the third production period for the large-scale achieved the best profit of IDR 6,681/bird. It was IDR 22,809 of production cost that composed by 60.53% of concentrate feed cost and 27.51% of DOD; and IDR 28,923 of revenue with consisting of 99.01% from the selling of live broiler duck and 0.99% from others (feed bags, excreta and cardboard). This farm also exhibited the efficient venture on the basis of IDR 21,797 of price BEP; 1.40 of R/C ratio; and 36.45% of rentability.
Branched Chain Volatile Fatty Acids Profile of Rumen Fluids Suplemented by Different Meal Protein Sources and Protein-Energy Synchronization Index
Authors: Syamsi A N , Waldi L , Widodo H S , Harwanto
Published: November 2019

The aim of this study is to examine the interaction between the meal protein source with the protein-energy synchronization index (PES) in the dairy ration on the profile of branched chain volatile fatty acids (BCVFA). The study was carried out in vitro, using factorial completely randomized design (CRD-Factorial). The first factor was 2 types of meal protein source (soybean meal and coconut meal) and the second factor was 3 levels of PES index (0.5, 0.6, and 0.7), there were 6 treatment combinations, each treatment was repeated 4 times. The results of the study showed that the interaction between the meal protein source and the PES index was not significantly affected (P> 0.05) on the levels of iso butyrate, isovalerate and valerate. The study concluded that the low PES index ration (0.5) produced a decent BCVFA profile using coconut or soybean meal.
Yield and Processing Properties of Concentrated Yogurt Manufactured from Cow’s Milk: Effects of Enzyme and Thickening Agents
Authors: Sumarmono J , Setyawardani T , Rahardjo A H D
Published: November 2019

The objective of the experiment was to investigate the yield and processing properties of concentrated yogurt manufactured from local cow’s milk with the addition of microbial transglutaminase enzim (mTGase) and several thickening agents. Concentrated yogurt was manufactured from local fresh milk, which were previously processed into plain yogurt by adding starter culture of lactic acid bacteria. The enzyme and four thickening agents (pectin, carrageenan, xantan, and inulin) were added before the fermentation process. The amount of mTGase was 0.03% (w/w), while the amount of each thickening agent was 1.5g/100g of milk. Partial removal of whey was conducted by modified in-bag straining method using nylon bags. Data was analyzed by the procedure of generalized linear model. Overall, the present study showed that yield and the processing properties of concentrated yogurt can be improved by the addition of enzyme (mTGase) and thickening agents: inulin, carrageenan, xanthan, and pectin. The use of xanthan resulted in the highest yield, whereas the use of inulin and mTGase produce yogurt curd with low syneresis and high water holding capacity.
Duck Production for Food Security
Authors: Ismoyowati  , Sumarmono J
Published: November 2019

Poultry meat and eggs are one of the most widely consumed animal origin food in various parts of the world, across a wide variety of cultures, traditions and religions. In 2016 the duck population (Anas spp.) throughout the world reached 1.24 billion and 1.1 billion (89 percent) were in Asia. The production of meat and duck eggs is still lower than chickens, but ducks make a significant contribution in providing high-quality nutritional food needs. The consumption of duck eggs accounts for around 10-30% of total egg consumption in China and Southeast Asia. Duck eggs contain all essential amino acids required by the human diet and are a good source of vitamins and minerals. Due to lower water content, they are more nutrient than chicken eggs. Asian is the leading continent in duck meat production with a share of 82.2%, followed by Europe with 12.4%. Asia has also the highest increase of total and of per capita duck meat by 308% and 244%, respectively. Almost 10 percent of poultry meat in Asia is compared to 4.1% in the world. People consume the duck meat because of their high nutritional value with complete essential amino acid composition and good fatty acid composition with a high percentage of polyunsaturated fatty acids and a balanced ratio between omega-6 fatty acids and omega-3. Large-scale duck production requires more efforts for higher efficiency and improving product quality by breeding, nutrition and management in accordance with animal welfare requirements and environmental protection. Family duck farmers (small-scale production) with limited capital contribute significantly to food security, poverty alleviation, and the ecologically sound management of natural resources. Farmers must have more access to obtain good duck breed, appropriate technology, and service support, which can substantially increase productivity, income, and food security.
Sheep Traders Preferences on Marketing Place and Their Satisfaction during Eid al-Adha Period in Yogyakarta, Indonesia
Authors: Ibrahim A , Artama W T , Widayanti R , Yulianto M D E , Faqar D , Budisatria I G S
Published: November 2019

Eid al-Adha is one of the important religious festivals for Muslims in the world. Sheep traders can be divided into primary traders and opportunist traders based on trade activity in this period. This study aims to investigate the preferences of sheep traders on marketing place and their satisfaction during Eid al-Adha period in Yogyakarta, Indonesia. In-depth and semi-structured interviews with 59 sheep traders were conducted on Juli 15 – August 25, 2018. The collected data were analyzed by descriptive analysis (score, index and rank). The results indicate that the most livestock purchased from the animal market, followed from farmers for primary traders and livestock traders for opportunist traders. Livestock most widely sold to individual consumers who come to their stalls, and then sold to animal market by primary traders and to organization/groups by opportunist traders. Most primary traders (64.10%) state to sell their sheep with different prices for different types of buyers, while the majority of opportunist traders (65.00%) thought no different. The average price different is IDR 286,364 according to primary traders and IDR 150,000 according to opportunist traders. Most of the primary traders (69.23%) and opportunist traders (90.00%) was pleased with the momentum of Eid al-Adha, as the selling price of their livestock could be higher, easy to sell, and any buyer. The conclusion is that both primary and opportunist traders in Yogyakarta have similar preferences in marketing place to buy and sell their livestock during Eid al-Adha period. Eid al-Adha period provides pleasure and an additional benefit for sheep traders.
Optimisation of electronics and mechanics system of automatic egg incubator machine
Authors: Iskandar J , Alrasyid S , Nurhaqiqi Eqi , Andria F , Tosida E T
Published: November 2019

In this research report result of optimisation of the electronic and mechanical system of an automatic egg incubator machine. The design of mechanical systems using two types of motors are stepper (one motor) and servo (3 motors) with the aim to produce a smooth movement of egg shelves in the maximum load that can be accommodated. In the electronic system used the thermostat as the controller of speed rate or maximum hatch temperature limit, while to maintain the humidity in the incubator moisture sensor used dht22 which integrated with a microcontroller. Also, the heat source on the incubator used two air heaters with 220 V / 65 W specifications. From the results of electronic and mechanics analysis per average the electrical power spent every 6 hours is 0.78 kWh. From the results of the driving test using a stepper and servo, the driver moves more optimally using a servo motor at a maximum load of 315 eggs (9 kg).
Design of power bank mobile using solar panel based microcontroller atmega 328
Authors: Ismangil Agus , Susanto Haddy Prasetya
Published: November 2019

The need for electric energy consumption is increasing. So, in search of new energy sources should meet the requirement that is generating a large amount of energy, economic costs, and no negative impact on the environment. One such energy source is solar energy. By using solar panels, solar energy can be converted into electrical energy. The use of solar panels as a source of electrical energy in the power bank, facilitate the charging of batteries when outside the room or when there is no source of electricity. In this experiment experiments using 5volt solar panels that function as a power source, 5000 mAh battery, and microcontroller ATMega 328 that serves as an output that displays the battery indicator through the LCD. This solar panel device becomes more economical and can be developed again by using components that have more power. Test results using 2 pieces of mobile phone can charge for 1 hour and successfully charge the battery of 26% and 22% respectively. With a fully loaded 5000 mAh battery capacity. Charge the battery by drying the power of the solar panel under the hot sun from 9 am to 3 pm.
A new 4-D hyperchaotic hyperjerk system with a single equilibrium, its dynamic properties and circuit design
Authors: Vaidyanathan S , Sambas A , Sukono  , Mamat M , Mada Sanjaya W S
Published: November 2019

This paper announces a new four-dimensional hyperchaotic hyperjerk system with a single equilibrium and discusses its dynamic properties such as Lyapunov exponents, phase portraits, Kaplan-Yorke dimension and equilibrium points. Hyperjerk systems have a nice triangular structure in their dynamics and they have many engineering applications. Our new hyperjerk system has three nonlinearities in total. New synchronization results based on active backstepping control are also derived for the new hyperjerk system. In addition, an electronic circuit implementation of the new hyperjerk system is designed carefully and examined well in MultiSIM. A good qualitative agreement has been shown between the MATLAB simulations of the theoretical hyperchaotic hyperjerk model and the MultiSIM results.
A new 3-D chaotic system with four quadratic nonlinear terms, its global chaos control via passive control method and circuit design
Authors: Lien C H , Vaidyanathan S , Sambas A , Sampath S , Sukono  , Mamat M
Published: November 2019

This paper reports the finding of a new three-dimensional chaotic system with four quadratic nonlinear terms. The paper starts with a detailed dynamic analysis of the properties of the system such as phase plots, Lyapunov exponents, Kaplan-Yorke dimension and equilibrium points. Our new chaotic system is obtained by modifying the dynamics of the Zhu chaotic system (2010), and it has complex chaotic properties. As an engineering application, passive control method is applied for the global chaos control of the new chaotic system. Finally, an electronic circuit implementation of the new chaotic system is designed and implemented in MultiSIM. A good qualitative agreement has been shown between the MATLAB simulations of the new chaotic system and the MultiSIM results.
Mechanism and influence of removing algae with chlorine dioxide treatment for ship ballast water
Authors: Jia Linan , Jiao Dawen , Yue Yin , Shi Xiaotao , Sun Lin
Published: November 2019

This study aims at examining the performance of the ClO2 on treating ballast water of Dalian new port area foreign trade oil pool in the cases of different experimental parameters, and Cylindrospermopsis raciborskii (CR), Gymnodinium catenatum (GC) and Gymnodinium cf. mikimotoi (GCM) are used for this experiment. The results shows that under certain test condition, the removal rates are in proportion to the dosage of ClO2 and reaction time, and inversely proportion to pH value, humic acid and ammonia nitrogen content. Accordingly, on operating at the optimal dosage of ClO2 and parameters of experiment, this process is proven to be an effective technology to remove these three algae and organic compounds in ballast water. In ballast water, the removal ability of ClO2 for these three algae is less sensitive to pH value, humic acid and ammonia nitrogen content than to ClO2 dosage and reaction time. Removing GC, GCM and CR with ClO2 are attributed to the second order reaction. Investigating the performance of such process, could serve to develop management strategies that enable mitigating the impacts of harmful substance in ballast water and help improving and ensuring quality of ballast water.
Study on stability of coal water slurry under different coal water slurry dispersants by using stability analyzer
Authors: Ge Lei , Li Junguo
Published: November 2019

The stability analysis of CWS by Turbiscan Lab stability analyzer not only can clearly observe the change of the supernatant layer in the slurry, but also can observe the change of the turbid area. It can objectively reflect the agglomeration and flocculation in the slurry, Settlement and a series of changes. The results show that the sedimentation mainly occurs in the coal-water slurry system made by HSC and HS, and the coal-water slurry system produced by NSF mainly reunion and sedimentation. The three dispersants on coal-water slurry stability enhancement ability were: HSC> HS> NSF.
Fuzzy matter-element model based on entropy weight Comprehensive evaluation ofatmospheric pollutant emission reduction potential in the port area
Authors: Zheng Wang , Cuihong Qin , Wei Zhang
Published: November 2019

Based on the entropy weight and fuzzy matter-element model, the entropy weight method is used to determine the weight coefficient of the evaluation index. The matter element analysis and the calculated entropy weight are used to calculate Euclidean. The degree of proximity has established a fuzzy matter element evaluation model for the entropy weight of atmospheric pollutants in the port area, and completed a comprehensive evaluation of different emission sources in the port area, providing technical support for scientific and effective reduction of air pollutants in the port area.
Analysis of high energy consumption of 1000MW ultra supercritical unit
Authors: Che Yongqiang , Yang Jianzhu , Han Yue , Guo Junshan , Haizhen Lv
Published: November 2019

A 1000MW ultra supercritical unit heat consumption rate was higher than design value 324.81 kJ/kW h, in this paper, by comparing the conventional test and assessment test, the result of the analysis of conventional test data at the same time, found out the factors that affect the unit heat consumption, low efficiency of unit mainly include cylinder and putting-in-service proactively reheat steam consumption reduction of warm water, small machine increase, feed water by-pass leakage, system other internal leakage, etc., application of equivalent enthalpy drop method, calculated the influence of the influence factors on the heat consumption of value.
A Method for Testing Resilient Modulus of Geotechnical Material
Authors: Nan Chen
Published: November 2019

Falling Ball Testing (FBT) is a recommended method for testing resilient modulus of subgrade soil, which brings about a higher requirement for modulus test. This paper focuses on a method for testing and calibration of the equipment of FBT. Both ways have been implied in testing modulus and the result has been analysed as well. The subject of testing includes nylon and PPR as standard elements. The supplementary equipment includes measuring tape, electronic scale, EWE (Elastic Wave Testing) and FBT. The indicating error and deviation ratio varies with 10% when the unit is well fixed. And the height brings about little affection for the result of modulus when the unit is well fixed. The method applied in this paper can also be used in the calibration of FBT device. And the proper height in the test is 0.2m during the calibration of FBT equipment.
Mechanical properties of plasma sprayed boron nitride nanoplatelet reinforced gadolinium-doped ceria (GDC) coating for intermediate temperature solid electrolyte
Authors: Cao Jinhua , Liu Weiwei , Chen Yao
Published: November 2019

Boron nitride nanoplatelet (BNNP) reinforced gadolinia-doped ceria (GDC) electrolyte was successfully fabricated by plasma spray. Phase constitution by X-ray Diffraction revealed that ceria was the dominating phase, and Raman spectra showed that the added BNNPs retained their original structure after harsh plasma spray process. Meanwhile, microstructure observations of the as-sprayed samples indicated that the addition of BNNPs had a significant influence on the reduction of porosity. Compared to GDC electrolyte, hardness and elastic modulus of the BNNP/GDC electrolytes were improved by ∼ 15.7% and ∼ 41.6%, respectively. More importantly, fracture toughness of as-sprayed BNNP/GDC electrolyte increased by ∼45.6%. These results illustrated that BNNPs had a positive influence on the mechancial properties. BNNP pullout, crack bridging by anchored BNNPs are the dominate toughening mechanisms for GDC composites electrolyte through SEM observing the fractured surfaces and development of indentation-induced cracks.
The Effect of Annealing Temperature on Recrystallization Texture and Magnetism Property of Non-oriented Silicon Steel under Asymmetrical Rolling Process
Authors: Zhenggui Zhang , Tie Xiao , Wanbo Zhu , Haonan CHEN
Published: November 2019

The effect of temperature on the recrystallization texture and microstructure of non-oriented silicon steel under asymmetrical rolling condition was studied and the relationship between the magnetism property and recrystallization texture was discussed. The results show that the texture intensity is higher at the fast roller side than that at the slow roller side, but the texture component of recrystallization texture is almost the same under different annealing temperature. At 750 °C, the main texture component is y texture (<111>//normal direction), and the texture (<110>//rolling direction) components become weak. At 850 °C, the main texture components are {111}<110> and {111}<112> texture components. With further increasing of the temperature, the strength of {111}<110> and {111}<112> texture does not change, but they tend to disperse and change to {118} and {1115}, and {001} plane texture. The results also indicate that the annealing temperature has significant influence on the iron-loss, but has no obvious influence on the magnetic induction.
A Study on the compatibility between accelerators and cement
Authors: Guan Mengqin , Li Xianghe , Chen Xiaolu , Guo Xinqi
Published: November 2019

The microcosmic and macroscopic methods were used to study the compatibility between accelerators and cement. The test results show that the environmental temperature, the water requirement of the normal consistency of the cement, the C3A content, the gypsum compatibility between accelerators and the cement. By testing the compositions and properties of various cements, the relationship between various factors and the compatibility between cement and accelerators is established, which provides theoretical support for the engineering application of accelerators.
Fatigue Analysis of Ladle Shell and Prediction of Lining Thickness
Authors: Ning Lichuan , Xie Yuanmin , Ma Ruyi
Published: November 2019

The fatigue analysis of steel cladding and prediction method of lining thickness have been studied. The traditional empirical estimates and operational adjustments are not accurate enough. The finite element strength analysis and fatigue analysis of ladle cladding are carried out. A prediction model for the thickness of ladle lining is established. A BP neural network life prediction model is proposed. Then the model is used to solve the problem. The service life of ladle lining is predicted. The actual use of ladle lining is more accurately understood. The service life of ladle lining is increased and the service life of ladle is prolonged.
Preparation and Properties of Chromium-Free Corrosion-Resistant Coatings for Oriented Silicon Steel
Authors: Liu Y , Wu L , Zhang J F , Shu S S , Liu J M , Xu J H , Li G Q , Hu Y , Cheng S , Zhang R , Tong L
Published: November 2019

An environmentally friendly chromium-free insulating coating suitable for oriented silicon steel was prepared by using aluminium dihydrogen phosphate, silica sol, water-based resin, sodium tetraborate and graphene aqueous dispersion as main raw materials. The morphology of the insulating coating was characterized by scanning electron microscopy. Corrosion resistance was investigated by neutral salt spray test and electrochemical test. Magnetic properties and surface insulating resistance were measured. The results showed that the surface of the insulating coating was flat; the addition of graphene could effectively improve the corrosion resistance and magnetic properties of the coating. The corrosion rate in the salt spray test was less than 10% after 120h, and the core loss was reduced by 9.57%. The addition of the graphene did not destroy the insulation properties of the coating. The surface insulation resistance per side of the coating was 269.51 Ω⋅mm2.
Study on the Conversion Relation between Brinell Hardness and Leeb Hardness of SA335 P92 Steel Welded Joint
Authors: Li Xinmei , Zhang Zhongwen , Li Nan , Zou Yong , Du Baoshuai , Li Xiulian
Published: November 2019

In this paper, the Brinell hardness tester and the Leeb hardness tester are used to test the hardness of the welded joints of P92 steel under different heat treatment conditions. A new conversion relationship between Brinell hardness and Leeb hardness of the welded joints of P92 steel is obtained by data fitting. The results show that the Brinell hardness of welded joints of P92 steel obtained from the original conversion relationship of the Leeb hardness tester is lower than that of the actual ones, because the chemical composition, microstructure and strengthening mechanism of P92 steel are obviously different from those of the low-carbon steel, low-alloy steel and cast steel. The new conversion relationship can accurately characterize the hardness of P92 steel components, solve the problem of the accuracy of the existing Leeb hardness tester to characterize this kind of material, and provide an accurate basis for the welding process and metal supervision of materials for ultra-supercritical units.
Preparation of solid polycarboxylate superlasticizer
Authors: Lin Yanmei , Lai Hua Zhen , Guo Yuanqiang , Ma Xiuxing
Published: November 2019

A solid polycarboxylate superlasticizer was synthesized with methacrylic acid,polyoxyethylene(TPEG),and microcrosslinking monomer(P) synthesized by using polyetheramine and croton acid. Studied acid/ether mole ratio, P dosage, rotating speed and reaction temperature on the solid polycarboxylate superlasticizer performance. The results showed that when acid/ether mole ratio was 4.0/1, P dosage was 8% of TPEG, rotating speed was 800rpm and reaction temperature was 60°C, synthetic polycarboxylate superplasticizer had the best comprehensive performance.
Effect of the Retarder for Grouting Materials in Pavement Reinforcement
Authors: Nan Chen
Published: November 2019

Grouting is a common method for pavement reinforcement. In order to improve the characteristics of the slurry, additives such as retarder and water reduce agent, are mixed with the slurry. This paper was focused on effect of the retarder for grouting materials in pavement reinforcement. Several tests have been done to reveal the effect of mass of retarder for setting time, flowability and strength. According to the result of the test, the best choice of retarders for a pavement grouting is the retarder e (NMS) for its good performance in the setting time, flowability, compressive strength and the price.
Preparation and high temperature oxidation behaviors of TiO2/Al2O3/Inconel625 composite coatings on the surface of Q235 alloy at 900 °C
Authors: Bai Lingyun , Men Dandan , Peng Wenyi , Chen Tuchun
Published: November 2019

Sol-gel method combined with plasma surfacing was used to prepare TiO2/Al2O3/Incone1625 composite coatings on the surface of Q235 alloys. Oxidation thermodynamic results show the composite coatings caused lower oxidation weight gain than the sample with single coating. Combination of XRD and SEM results illustrates that the surface and cross-sectional morphology were composed of an innermost continuous but not compact enough Cr2O3 layer, the outer layer next to C2O3 was loose and cracked NiO, and the outermost layer was composed of iron oxides for the Incone1625 coated sample. For the composite coating sample, the oxide film was composed of NiO as the outermost layer, Cr2O3 as the inner layer, there was a very thin but continuous layer consisted of Cr2O3 and Al2O3 as the innermost layer. This work shows that TiO2/Al2O3/Incone1625 composite coating improves the high-temperature oxidation resistance properties of the Q235 alloy at 900 °C by promoting the formation of the protective Cr2O3 and Al2O3 film.
Material properties analysis on spring and screw of an elevator brake
Authors: Ren Facai , Zhang Mingxian , Wu Xinghua
Published: November 2019

The material properties of spring and screw of an elevator brake failed during use was analyzed. The macroscopic morphology and metallographic microstructure of the spring and screw of an elevator brake were investigated based on the optical microscope and scanning electron microscope analysis. The chemical composition was analyzed by X-ray energy spectrum analysis. The results showed that the material of spring and screw are 65Mn spring steel and 40 steel, respectively. The material of spring has porous holes inside.
Microstructure and wear property analysis of an elevator brake plunger
Authors: Ren Facai , Zhang Mingxian , Wu Xinghua
Published: November 2019

The microstructure and wear property analysis was performed on an elevator brake plunger. Based on the optical microscope and scanning electron microscope analysis, the macroscopic morphology, metallographic microstructure and wear property of the elevator brake plunger were investigated. The results showed that the material of elevator brake plunger is prone to adhesive wear.
Effect of microstructure and mechanical properties on tensile loading-unloading characteristics of cold-rolled DP780 steels
Authors: Lin Chengjiang , Tang Di
Published: November 2019

Tensile loading-unloading characteristic of three cold-rolled DP780 steels was studied. Similar hardening behaviour was showed by these steels even with different chemical composition and microstructures. Tensile loading-unloading tests with prestrain between 0.5% and 8% were carried out on Instron tensile testing machine. Sample microstructures were analysed by EBSD and SEM. Hardness of ferrite and martensite were measured by nanohardness instrument. Total unloading recovery strain, which is related to unloading chord modulus (Echord), can be divided into elastic strain and microplastic strain. The results showed that there was no correlation between unloading microplastic strain (εmp) and phase fraction or phase size within the scope of this study. However, with the increase of flow strength increment, εmp increases while Echord reduction becomes larger. Furthermore, εmp depends on the phase yield strength ratio between martensite phase and ferrite phase (σm/σf), emp increases as the σm/σf increase for a given flow strength increment. The results showed that the springback of DP780 steels can be improved by reducing the yield strength difference between martenstie and ferrite.
Research on Experimental Parameters of Reflective Off-axis Digital Holography
Authors: Yi-shu Zhang , Zhi-yang Guan
Published: November 2019

Summarized the research status of digital holography microscopy technology. Aiming at the experimental parameters which influences the quality of hologram recurrent image, the recording and reconstruction process of hologram are analyzed, the reconstruction distance are calculated which based on the reflective off-axis digital holographic light path. The experiment records the hologram of standard resolution board and reconstruct it under different light intensity ratio. The results show that the object and reference light intensity ratio have a significant impact on the quality of hologram recurrent image. Besides, it’s the key to determining an appropriate recording distance and object and reference light intensity ratio of improving the quality of hologram. The result would provide theoretical basis and technical conditions for studying the reflective digital holography based on 3-D reconstruction.
Simulation Analysis of Exothermic Powder in Riser Area on Inner Quality of Steel Ingot
Authors: Yadong Xu , Yanan Wang , Wen Zhang , Ting Fei , Yong Zhang , Guangbing Zhang
Published: November 2019

15t steel ingots of different amount of exothermic powder were under computer simulation analysis by casting simulation software with the distribution of shrinkage cavity predicted. The results showed that, with increasing adding of exothermic powder, the final solidification high temperature area moves from the main body of the ingot onto the riser area, so that the riser can feed the shrinkage cavity very well. The simulation result agrees with validation experiments very well. It indicates that the optimized adding suitable amount of exothermic powder in riser area can effectively eliminate the shrinkage cavity, and enhance the steel ingots’ quality and the ration of utilization.
IGBT junction temperature prediction method based on improved artificial bee colony algorithm for optimizing SVR
Authors: Liu Jiacheng , He Yigang , Zhou Jianbo , Ni Huadong , Zhang Zhongtao
Published: November 2019

Aiming at the low precision of IGBT thermal parameter junction temperature prediction method and the need to extract multiple parameters and being vulnerable to load, the improved artificial bee colony algorithm optimized support vector regression machine (ABC- SVR) is used to predict the IGBT junction temperature. Firstly, the formula for updating the honey source in the artificial bee colony algorithm (ABC) is improved, and the fitness probability of Follower bee select honey source is introduced to construct the weight function; Then the problem of support vector regression (SVR) parameter selection is transformed into the parameter combination optimization problem, then establish an optimal SVR model; Finally, the data from the IGBT accelerated aging test provided by the National Aeronautics and Space Administration (NASA) is taken as a sample, the predicted results of the improved ABC-SVR model and the common ABC-SVR model were compared and analyzed. Through the simulation results, the prediction effect of improved ABC-SVR model is better than the common model, and the running time is greatly reduced, it has greater precision in junction temperature prediction.
Optimization of the raw material field layout for iron-steel enterprise
Authors: Liu Wenbo , Kong Yuehong
Published: November 2019

This paper studies a short-term layout optimization problem with the raw material field for iron-steel enterprises. The raw material field is a centralized storage place and distribution unit of various raw materials such as iron ore, which plays a significant role in the iron front logistics for iron and steel enterprises. Whether the stacking of raw materials is reasonable or not directly affects the logistics efficiency and logistics cost of raw materials for iron-steel enterprises. Based on the status and basic information of the raw materials, storage space of the field shall be made full use of to allocate the optimal position for each type of raw material. To achieve this goal, a mixed integer programming (MIP) model is developed, which is purposed to minimize the transportation cost and the loss of mixing. The solution compares favorably with the current practice in the iron-steel enterprises.
An Effective Method for Defect Detection of Copper Coated Iron Wire Based on Machine Vision
Authors: Ma Yuqing , Ge Xueren
Published: November 2019

In this study, a defect detection system based on machine vision is established to distinguish the defective copper coated iron wires during electroplating. By collecting the real-time images in the production line using a CCD industrial color camera, this system could effectively identify different colors and connect the same pixel region based on Halcon. Also, image segmentation is applied to eliminating the interference of the bearings placed around the wires. Then, the division procedure is completed and the defective area is classified. This defect detection system could efficiently improve the level of automation during industrial production.
Summary of Improvement and Research Based on Robust Principal Component Analysis Model
Authors: Bian Xinxin
Published: November 2019

Moving object detection play an important role in the application of computer vision. In recent years, the proposal and improvement of robust principal component analysis has broad application prospects in intelligent video surveillance and other fields. In order to enable domestic and foreign researchers to deeply explore and apply the RPCA, this paper systematically reviews it. This paper summarizes the latest research progress, summarizes various RPCA models at home and abroad, and theoretically analyses their advantages and disadvantages. In this paper, different improved models are applied to video sequences of different scenes, and comparative experiments are carried out. Overall, the current improved algorithms can effectively remedy the shortcomings of the original RPCA method and improve the accuracy of moving object detection. However, some limitations of RPCA need to be further studied.
Failure analysis of a high temperature superheater pipe
Authors: Ren Facai , Su Jiansheng , Tang Xiaoying
Published: November 2019

The failure causes of a superheater pipe of a supercritical once-through boiler were analyzed based on the chemical composition analysis, tensile test, hardness and microstructure analysis. The results show that the microstructure changing from martensite to austenite due to the high temperature exceeded Ac1 causes the sharply decrease in the strength of superheater pipe.
Analysis of Numerical Simulation of 0Cr18Ni9 Stainless Steel Pipe Welded Joint
Authors: YuKun Yang
Published: November 2019

0Cr18Ni9 stainless steel pipe is a commonly used welding material, which has great demand in shipbuilding, boiler pressure vessel and construction engineering. In this paper, for a given welding process condition, select reasonable parameters, carry out numerical simulation process on welded joints, analyze the temperature field distribution law and stress field value of welded joints, and judge whether it is consistent with the actual.
Research on Intelligent Diagnosis Method of Rolling Bearing Fault Based on Machine Learning
Authors: Jianyan Sun , Lin Li , Weijia Zeng
Published: November 2019

In order to solve the problem of poor intelligent diagnosis results of bearing faults, an intelligent diagnosis method of rolling bearing faults based on machine learning is proposed. Through extracting the characteristics of common fault parameters of rolling bearings, the comparative values of bearing fault diagnosis are obtained. In order to ensure the stable operation of the bearings, a machine-learning rolling bearing diagnosis platform is designed for the acceptable deviation values in the standard operating parameters of the bearings, so as to carry out fault diagnosis and feedback control processing on the operating parameters of the bearings in time, thus realizing intelligent diagnosis of rolling bearings faults. Finally, the experiment proves that the intelligent diagnosis method of rolling bearing fault based on machine learning is obviously improved compared with the traditional method.
Development and Application of Green Manufacturing
Authors: Liang Shaoqiang
Published: November 2019

Green manufacturing is an important means to alleviate the pressure of world resources and environment and promote the transformation of manufacturing industry. This paper analyses the main application of green manufacturing and the future development direction of green manufacturing, and is available for suggestions for the future development of green manufacturing. Green manufacturing promotes the formation of circular economy model and the sustainable development of human society. It is an indispensable part of implementing sustainable development strategy.
Design of main frame of tunnel lining trestle with multivariate response model
Authors: Hu Zhirong
Published: November 2019

The main frame of the key equipment trestle in the tunnel lining rapid construction complete set process is the research object. Taking the main frame structure optimization and light mass of the trestle as the research goal, the Central Composite Design test design method is used under the conditions of using the structural strength and stiffness. The primaries of the multi-structure size parameters are subjected to sensitivity analysis, and the sizes that have large influence on the structure mass, the maximum deformation, and the maximum equivalent stress are selected as the final design variables. The response surface model between the design variables and the optimization targets is established, and the global optimal solution of the design variables is solved by the MOGA algorithm. The analysis results show that the optimized structural section parameters meet the requirements of tunnel rapid lining construction, and the mass is reduced by 7.9%.
Research and Design of Multi-Joint Bionic Robot
Authors: Yang Defan , Wang Rihe , Lu Yaping
Published: November 2019

According to the various movement patterns of snakes and caterpillars, the body structure of Multi-Joint Bionic Robot is designed and analyzed, and the Multi-Joint Bionic Robot model was printed by ABS material 3D.The multi-Joint Bionic Robot is designed to achieve winding forward, multi-limb reversal movement, turning, curled up and other movements, through the voice signal detection, ultrasonic distance detection to mimic the ears and eyes of the creature. At the same time, for the problem of controlling joints, a control method combining distributed control and centralized control is proposed, and the parallel control method of multi-joint joints is studied. Experiments were carried out on the multi-joint robot body to analyze the force of the Multi-Joint Bionic Robot during the movement, and the smoothness and fluency of the robot movement were realized.
Research on Numerical Control Programming Error Analysis of Complex Free-form Surface Machining Accuracy
Authors: He Fang , Luo Jihui , Tian Meizi , He Renqi
Published: November 2019

In order to improve the machining precision of NC machining of complex free-form surface, the factors affecting the precision of NC machining of free-form surface are analyzed. The main links of NC programming are studied. The method of reducing NC programming error and improving machining accuracy is proposed.
Cooling principle of high temperature heat exchange machinery system with moderate cold source
Authors: Qi Ping , Cao Limei , Wang Jun , Ribeiro e Sousa Luis
Published: November 2019

High rock temperature in deep coal mine is a problem, which restraints the exploration of coal resources, we must reduce the temperature humidity at working face. The HEMS (High temperature heat Exchange Machinery System) were developed by using coal mine water as cold source. The system is applied in Jiahe colliery with moderate cold source in phase I, for phase II, we proposed water circulation at different elevations as cold source and the cooling system run effective. Operational principle for HEMS-I was presented and gave the theoretical basis for optimization design. After cooling, air temperature at C point on working face is from 28∼29 °C, it is less than 30°C and conform to coal mine safety regulation.