The competition of modern agriculture is essentially the competition of agricultural industrial chains. The stable relationship between upstream and downstream along agricultural industrial chain is an efficient path to enhance its competitive advantage. This study takes the typical agricultural industrialization mode of ‘enterprise + cooperative + rural households’ in China as the research object. It analyzed the interactions between the main entities of this mode, which are agricultural enterprises and farmer’s cooperatives, from the dynamic perspective using symbiosis theory. This study constructed a symbiotic evolution model based on their interplays. By deriving the model equilibrium and its stability conditions, it conducted a simulation study to analyze the process of symbiotic evolution. The results reveal that the symbiosis mode evolved is mainly hinged on the values of symbiosis coefficient, and symmetric mutualism is the optimal evolution direction, as well as the most stable and efficient symbiosis mode. These findings imply that the government should optimize the environment of industrial symbiosis, guiding agricultural enterprises and farmer’s cooperatives to evolve to symmetric reciprocal symbiosis mode in an efficient path.

Formation of an emulsion is often seen as undesirable in many chemical industries. Therefore, coalescence serves as a very important factor in the separation of water from oil. Deformation of mixed water droplets falling into sunflower oil and their coalescence behavior under a non-uniform electric field may occur in either of two modes, namely droplet-droplet and droplet-interface coalescence behaviors, which are investigated using a ramp-AC waveform type. In this work, the process was operated utilizing a batch cylindrical separator under high-voltage condition. For the droplet-droplet coalescence, a Perspex cylinder was filled completely with sunflower oil and the upper and lower parts of an electro-coalescence cylinder were filled with sunflower oil and an aqueous phase, respectively, to form an interface between the two phases. Drop–interface coalescence experiments were done by allowing the droplets to fall in oil. Using a high-speed camera, three coalescence patterns were observed for the drop-drop and drop-interface cases: complete coalescence (150 V/mm), incomplete coalescence (200 V/mm), and no-coalescence (250 V/mm). The first pattern is desired as it leaves no secondary droplets. In the present research, observations on the coalescence behavior are discussed in detail.

Background and Objective: Essential oils of some plants postpone corruption of fruits. Materials and Methods: In this study, thyme essential oil was emulsified by whey protein isolate (WPI) and gum Arabic (GA) at different mass ratios and antimicrobial properties of thyme Nanoemulsion was investigated. Results: The particle mean diameter in the range of 7.80 to 461.17 nm obtained from DLS method. The analysis of volatile compounds by GC-MS revealed that Carvacrol (69.76%) and thymol (21.37%) were main constituents. Conclusion: The thyme oil Nanoemulsion had slightly better antimicrobial properties than thyme oil when tested against citrus putrefactive microbial florain microbial growth media.

For induction motor torque control, direct torque control is becoming the industry standard. This paper proposes a switching loss minimization technique for improved Direct Torque Control (DTC) of permanent magnet synchronous motors in order to increase the drive system\'s steady-state and dynamic results. Direct torque control (DTC) of a voltage source inverter-supplied PMSM is a simple scheme that requires little computation time, can be implemented without speed sensors, and is unaffected by parameter variations. In theory, the motor terminal voltages and currents are used to calculate the flux and torque of the motor. A voltage vector is chosen to restrict the flux and torque errors within their flux and torque hysteresis bands based on the instantaneous torque and stator flux magnitude errors, as well as estimates of the flux position. The electromagnetic torque, rotor speed, and stator current of DTC with PMSM and DTC with IM were successfully calculated using Total Harmonic Distortion (THD) in this article. As compared to DTC with IM, DTC with PMSM reduced THD by 12 percent in torque, speed, and stator current [21]. Switching Losses Minimization Technique by THD Minimization is used in this article. Since transistors are only switched when necessary to maintain torque and flux within their hysteresis limits, switching losses are minimised, resulting in increased efficiency and lower losses. Matlab SIMULINK has experimentally confirmed direct torque regulation with PMSM and IM.

In order to overcome the problems of low security and accuracy of traditional online social network data mining model, this paper proposes and constructs a new online social network data mining model based on blockchain. Based on the blockchain structure, the hash function in the blockchain is used to encrypt the online social network data to improve the security of the data. Based on the encrypted data, the fuzzy covariance matrix is used to obtain the data clustering center to complete the data clustering. According to the data clustering results, time series analysis method is used to mine online social network data. Experimental results show that, compared with the traditional mining model, this model can effectively improve the security of online social network data, and improve the mining accuracy, with the highest mining accuracy of 97%.

Traditional methods have the problem of long time-consuming information encryption when encrypting vehicle terminal information security. For this reason, a research on vehicle terminal information security encryption based on TRDP protocol is designed.First, design the RDP protocol stack structure, build the TRDP service model, and analyze the TRDP communication mechanism; secondly, compare the TRDP process data and message data to build a non-directional two-phase path relationship network for vehicles;Then, through vehicle terminal information transfer parameters, data space collection utilization parameters, data transfer time consumption parameters, and vehicle network information ciphertext failure rate parameters, the current vehicle communication terminal data encryption algorithm is improved.Finally, through idealized data scanning, a large number of preset paths are set up for data transmission, and data encryption keys are set, and cross-transformation is used to realize secure encryption of vehicle terminal information. The experimental results show that the vehicle terminal information encryption method in this paper consumes less time and has a higher detection rate of abnormal messages, which has a wide range of application values.

Introduction: Depression can have unfavorable complications for the mother and the baby. Given the probable relationship of social support with the amount of depression, the present study aimed to determine the relationship between perceived social support and depression, before and after cesarean in the pregnant women referring to Besat Hospital in Sanandaj in 2018.\nMaterials and methods: The present study is descriptive co-relational and cross-sectional, and was conducted on 180 pregnant women enrolled for the cesarean section referring to Besat hospital in 2018 who were selected according to available sampling method. The demographic information questionnaire, the perceived social support of MOS-SSS, and the depression, questionnaires Dass 21 were used to collect data. Using the SPSS 16 software, the data was analyzed through descriptive statistics, Pearson co-relation.\nResults : Results indicated that the degree of the overall rate of depression, before cesarean was 35.5% and in the post operation stage 21.7% respectively. In addition, there was a negative significant difference between social support and depression, before the operation (p<0.05, r= -0.816), and depression, after cesarean (P<0.05, r= -0.788).\nConclusion: The results of the study showed that there is a negative and significant relationship between perceived social support and depression, before and after cesarean section. Hence it is advised that interventions be designed to identify and promote the level of social support in the pregnant women enrolled for Cesarean.