Pressure swing distillation for separation of methanol and methyl ethyl ketone was investigated based on thepressure-sensitivity of azeotropic composition. Taking the lowest total heat load of reboiler of the high pressure and atmospheric pressure towers as the optimization objective, the theoretical plate number, feed position and mass reflux ratio of the two towers were optimized. The optimum process parameters were obtained as follows: high pressure tower operating pressure 300kPa, theoretical plate number 37, feed position 22, reflux ratio 2.5; atmospheric tower operating pressure 101.3kPa, theoretical plate number 48, feed position 11, reflux ratio 4.25. The mass fractions of methanol and methyl ethyl ketone are 99.75% and 99.53%, respectively. On the basis of ordinary pressure swing distillation, the system is fully heat integrated. Compared with ordinary pressure swing distillation, the heat load of the condenser of fully heat-integrated pressure swing distillation reduces by 48.07% and the heat load of reboiler decreases by 47.62%, which realizes effective energy saving.

The basic properties of the produced water at each ternary station were initially obtained, through the analysis of the water quality, oil contentsettling time relationship and the characteristics of the produced water-time relationship of Zhong-106 ternary composite flooding in Daqing Oilfield. The ternary produced water contains a large amount of crude oil, suspended solids, oil displacing agents and the like. Due to the synergistic effect of the components, the pH value, particle size, viscosity and surface tension of the produced water remained basically unchanged after 72 hours of sedimentation, indicating that the properties of the produced water were relatively stable and the treatment difficulty was increased.

A polyoxometalate antitumor drug delivery system, K14[NaP5W29O107]·40H2O starch-based microparticles (P5W29-CSM for short), have been prepared by the inverse emulsion method using soluble starch as raw material, epichlorohydrin as crosslinker. The preparation process of starch microspheres drug delivery was explored and determined. The structure of P5W29-CSM was characterized by SEM, IR, X-ray powder diffraction and UV-visible spectroscopy. The content of polyoxometalate in P5W29-CSM was 4.9% which is determined by UV spectrophotometry.

In order to explore the pyrolysis properties of sesame shell and realize its effective utilization, the TG and DTG methods are adopted to investigate the pyrolysis behavior at different heating rates. The results show that the main weightlessness range is from 200 ℃ to 400 ℃, which is a fast decomposition stage, from 400 ℃ to 1000 ℃, the reaction rate slower, the weight loss decrease. Kinetic analysis show that the two pyrolysis stages can be simplified as a first-order reaction，and calculated activation energy are 23.2726.02 kJmol-1 and 19.9421.48 kJmol-1，respectively. The activation energies of low temperature pyrolysis are higher than that of high temperature pyrolysis at the same heating rate.

In this paper, the catalysts of zirconium oxychloride on molecular sieve were prepared by immersion, and which was employed to catalyze the condensation reaction of 4-cyanopyridine and ethanol amine for synthesizing the pharmaceutical intermediates of 2-(pyridin-4-yl)-4,5-dihydrooxazole under solvent-free conditions. The resultants were identified by gas chromatography - mass spectrometry and the contents were determined by gas chromatography. The results indicated that, These catalysts all exhibit high catalytic activity. The activity is mainly derived from ZrOCl₂·8H₂O. It is also affected by the specific surface area of the carrier and the number of acidic sites. ZZrOCl₂·8H₂O/H-MCM-41 has the highest activity. By single factor multi-levels experiments, the optimal technology for the synthesis of 2-(pyridin-4-yl)-4,5-dihydrooxazole was obtained. The optimal conditions were as follow: the molar rate of 4-cyanopyridine to ethanol amine was 1:2, 10% ZrOCl2·8H2O/H-MCM-41 was used as catalyst, catalyst dosage was 10% mass of reactants, reacted at 110 ℃ for 3 h. Under the optimum technology, the conversion of 3-cyanopyridine was up to 98.4%.

In order to change the current situation of artificially cramming the wall of the high-rise building to improve the painting efficiency and reduce the labor intensity, a robot that can be used for spraying the exterior walls of high-rise buildings is designed. The painting robot adopts the vacuum adsorption principle, adsorbs on the vertical wall surface, and walks through the crawler belt. Use remote image transmission and remote control to achieve the purpose of spraying the exterior walls of high-rise buildings.

According to the requirements of field control of dye ingredient, an automatic control system of dye formulation based on Siemens PLC and Metler-Toledo weighing instrument is designed. The upper computer running system is completed by Kingview 7.5 configuration software. The whole system realizes high precision automatic control of dye formulation. It has the characteristics of reliable communication and simple operation. It effectively improves the production efficiency and guarantees the stability of the system.

Using Moldflow software as an analysis platform , taking an electrical plate of over- wire as a specific case, the plastic part structure was analyzed firstly, then the plastic part was formed and analyzed using cold and hot flow channel technology. Comparing the CAE parameters of the two technologies, then get the results. The application of thermal channel technology to injecttion mold design can use lower filling melt temperature, reduce the risk of melt polymer decomposition significantly, and the application of thermal channel technology can reduce the possibility of cavitation and fusion marks due to gas distress and temperature difference. At the same time, the cooling time can be reduced and the efficiency of die production can be greatly improved. The analysis results provide theoretical support for the wide application of hot channel technology in injection mold design.

At present, there is a lack of management and layout design for the parking device of small vehicle which refers to E-bike, bike and motorbike, etc. We designed a new type of automated small vehicle stereo parking device, which is driven by microcomputer and stepper motors. It realizes vehicle access and management through automatic control. Intelligent vehicle management can effectively solve the problem of irregular parking at present and have the advantage of a higher rate of space utilization. It is suitable for the place where the land is limited. The actual area used are less than 3 square meters per device, but has the storage of at least 24 small vehicles.

At present, most people have poor sleep quality, difficulty in falling asleep and insomnia，in order to alleviate this phenomenon more effectively,this paper designs a sleep quality detection device based on STM32 controller.The device can use LCD touch screen, real-time display time, temperature and humidity, noise, carbon dioxide concentration and other information of the environment,at the same time, users can independently define factors that affect sleep quality.It can communicate with curtains, air conditioners, stereos and refrigerators at home,they work together to create a sleeping environment that minimizes the impact of external factors.The device is easy to operate, stable and reliable. It provides good sleep service for users and creates a suitable environment.

Charging pile is the most important equipment of electric vehicle power system. According to the demand of electric vehicle for charging equipment, the article uses PLC as the core controller to introduce the design of electric vehicle AC charging pile control system. The hardware circuit includes the design of the main control module PLC, the touch screen, the power calculation module, the printing module and the like; the software system includes the communication design of the PLC main program design, the touch screen, the IC card and the like, and enables communication between the modules through communication. The data transmission is smoothly realized, and various data collection in the charging process is completed in real time; the electrical part of the whole system is also provided with double protection for the purpose of safe operation.

The quadruple-tank system is a typical multi-level system with characteristics such as slow dynamics, strong coupling and nonlinear etc, and can be used to simulate the motion of minimum system or nonminimum system. This paper firstly determine the distributed control structure on the basis of relative gain array (RGA) analysis, then predictive PI control strategy is proposed. Simulation results show that distributed predictive PI control can efficiently overcome control input saturation, considerably enhance dynamic performance and easily apply to engineering, compared with traditional PI control.

Activated carbon was prepared from rice husk,and the adsorption behavior of Cr(VI) on activated carbon in adsorbed water was studied.By single factor method the effects of pH value of solution,dosage of activated carbon from rice husk,adsorption time and reaction temperature on adsorption performance were investigated and the kinetic characteristics were studied.The results showed that Cr(VI) adsorption by activated carbon from rice husk reached equilibrium within 120 min,the adsorption rate of Cr(VI) can reach 96% when the pH is 2 and the temperature is 30 ℃.The adsorption process conforms to the quasi-second-order kinetic equation and follows Langmuir isotherm model.The monomolecular layer adsorption is predominant in the activated carbon adsorption process.

Porphyrin Compounds have been Widely Used in Biomedical Fields such as Treatment and Diagnosis due to their Characteristic Photo Electrochemical Properties. However, Their Poor Water Solubility and Uneven Dispersion Resulted From Low Molecular Aggregation Lead to The Decrease of Optical Properties, Which Limit Their Application in The Field of Biomedicine. In Order To Improve The Above Shortcomings, The Porphyrin Terminated Poly(N-isopropylacrylamide) (MHTPP-PNIPAM) was Prepared by Atom Transfer Radical Polymerization (ATRP). The Structure of Polymers were Characterized by Infrared spectroscopy(FT-IR), Hydrogen Nuclear Magnetic Resonance Spectrometer(1HNMR),Which Shows That Desired Product has been Synthesized Successfully. The Influence of Reaction Time and Concentration of Monomer / Initiator on The Polymerization was Investigated.

The polyurethane prepolymer was synthesized by using raw materials, including polypropylene glycol, 1,4-butanediol and cationic chain extender Nmethyldiethanolamine. Then, orthosilicate was added to the prepolymer and SiO₂ particles were prepared successfully by hydrolysis of ethyl orthosilicate. Five kinds of cationic aqueous polyurethane emulsions with different contents (mass ratio of orthosilicate/prepolymer) were obtained. The characterizations of emulsion functional group structure, emulsion particle size analysis and heat stability analysis were carried out. The appearance of Si-O bonds in infrared characterization can indicate the successful introduction of SiO₂ particles in the emulsion. Through the particle size analyzer and thermogravimetric analyzer, it can be concluded that with the increase of SiO₂ content, the particle size decreases, the heat resistance is improved, and the surface tension also increases. The preparation of nano-SiO₂ cationic waterborne polyurethane emulsionthe possess good dispersion, stable storage and high thermal stability.

Based on the multiple seasonal ARIMA model, the monthly PPI data from January 2006 to December 2018 is used to eliminate the tendency and seasonality by the phased and seasonal difference with the help of EVIEWS8.0 software. . Through comparison of indicators,. the model ARIMA(3,1,0)(1,1,1)24 is established to predict PPI from January to June in 2019．The result shows that the model has high prediction accuracy for short-term PPI, which provides the reference for the formulation of relevant economic policies.

In this paper, we study the positive definite solution of a class matrix equations, that is the Hermite positive definite solution of the equation. First ,we show a matrix iterative sequence,then, according to the fixed point theory, a sufficient condition for the existence of positive definite solutions is given. Finally, numerical examples show the feasibility of the proposed method.

CaSiO₃:Eu³⁺Bi³⁺and Sr₂SiO₄:Eu³⁺Bi³⁺ were prepared by means of Sol-Gel method .The influences of host materal change on Eu³⁺and  Bi³⁺ were researched by contrasting the excitation and emission spectras of CaSiO₃:Eu³⁺Bi³⁺ and Sr₂SiO₄:Eu³⁺Bi³⁺. The results showed that energy transfer efficiency between Bi³⁺ and Eu³⁺ in Sr₂SiO₄:Eu³⁺Bi³⁺ was obviously higher than the one which was in CaSiO₃:Eu³⁺Bi³⁺.

Among the rich functions of Office Automation system (OA), Office process approval is the core of OA system. It is the module with the largest localization and customization space in OA system. In-depth customization based on the module and actual needs of enterprises is the key to Office informatization in colleges and universities. In this paper, the design process of Jilin Institute of Chemical Technology is analyzed and the experience is summarized.

Artificial Intelligence, as a branch of computer science, has been applied and developed in education industry in recent years. Higher education is the main place for training talents in our country, and it is also one of the best application scenarios of artificial intelligence. Among them, image processing technology is becoming more and more mature. Face recognition access control has gradually entered people's lives. Integrating artificial intelligence face recognition with laboratory entrance guard, obtaining students'face information from university student database, uploading it to face database in batches, and combining the entrance guard system with the administration system, students can make experiment appointment, brush their faces into the door, and input attendance information into the educational administration system. The application of this system promotes the development of educational informationization and realizes University laboratory. Intelligent management.

In the Monitor System granary temperature and humidity, and air is an important granary environment monitoring data. The continuous development of Internet technology, wireless sensor technology and 4G technology provides stable technical conditions for the monitoring of temperature and humidity in granary. The final part of wireless sensor network technology is wireless sensor network technology. Wireless sensor network technology mainly consists of three parts: node, sink node and management node. This paper will deeply analyze the implementation strategy of wireless sensor network in temperature and humidity monitoring system of granary.