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为提高甜瓜籽利用率，采用超声辅助提取工艺提取甜瓜籽油，以甜瓜籽油得率及DPPH自由基清除率为指标，通过单因素实验研究超声时间、超声温度、料液比、浸提时间对甜瓜籽油提取的影响，在此基础上采用响应面实验对提取工艺条件进行优化，并测定提取的甜瓜籽油理化指标、总酚含量、甾醇和脂肪酸组成及含量。结果表明:甜瓜籽油的最佳提取工艺条件为浸提时间3 h、料液比1∶ 7.7、超声温度43 ℃、超声时间41 min，在此条件下甜瓜籽油得率为25.64%，DPPH自由基清除率为60.66%；制备的甜瓜籽油酸值（KOH）为0.52 mg/g，过氧化值为0.00 mmol/kg，碘值（I）为133.38 g/100 g，总酚含量为8.72 mg/100 g;甜瓜籽油中共检出5种脂肪酸，其中亚油酸含量最高，为66.68%，共检出7种甾醇，总含量达306.10 mg/100 g，其中β-谷甾醇含量最高，为138.60 mg/100 g。甜瓜籽油营养价值较高，可作为食用油进一步开发利用。 In order to improve the utilization of Cucumis melo L.seeds, Cucumis melo L.seed oil was extracted by ultrasonic-assisted extraction.The yield of Cucumis melo L.seed oil and DPPH radical scavenging rate were taken as indicators, and the effects of ultrasonic time, ultrasonic temperature, solid-liquid ratio, and extraction time on the extraction of Cucumis melo L.seed oil were investigated by single factor experiment,then the extraction conditions were optimized by response surface methodology.The physicochemical indexes, total phenol content, composition and contents of sterol and fatty acid of extracted Cucumis melo L.seed oil were determined.The results showed that the optimal extraction conditions were obtained as follows: ultrasonic time 41 min,ultrasonic temperature 43 ℃,solid-liquid ratio 1∶ 7.7, and extraction time 3 h. Under these conditions, the yield of Cucumis melo L.seed oil was 25.64%, and the DPPH radical scavenging rate was 60.66%. The acid value,peroxide value, iodine value and total phenol content of Cucumis melo L.seed oil were 0.52 mgKOH/g, 0.00 mmol/kg，133.38 gI/100 g, and 8.72 mg/100 g，respectively.A total of five fatty acids were detected in Cucumis melo L. seed oil, of which linoleic acid had the highest content of 66.68%, and seven sterols were detected, with a total content of 306.10 mg/100 g, of which β-sitosterol had the highest content of 138.60 mg/100 g. Cucumis melo L.seed oil has high nutritional value and can be further developed and utilized as an edible oil.

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Aiming at the problem of gas overrun at No.31102 working face in Cuncaota No.2 Mine, a comprehensive control was adopted by combining the adjustment of the air supply of the working face and the gas extraction of the buried pipe in the tail roadway. By establishing a fluid-chemical-thermal multi-field coupling mathematical equation and using COMSOL software to simulate the gas control process, the hazard law of multi-field coupling in goaf was obtained. The research results show that the air volume of the working face increases, the high gas area of the goaf moves toward the back of the goaf, and the gas volume fraction of the working face decreases. The air volume of working face is 1 174 m³/min as the basic air volume. When the ratio is increased to 1.25, the gas volume fraction at the corner of the working face is reduced to 0.24%, the high temperature area of the goaf has a certain hysteresis relative to the range of the oxidation zone, the drainage flow rate of the buried pipe gas drainage increases, and the goaf is oxidized. The width of the belt also gradually increased, and finally the extraction flow rate was 60 m³/min, the width of the oxidation belt was 295 m, and the gas at the corner of the working face was reduced to 0.16%. [ABSTRACT FROM AUTHOR]

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Objective:To explore the relationship among attachment, differentiation of self and aggression in middle school students. Methods: Totally 314 middle school students were selected. The Inventory of Parent and Peer Attachment Revised (IPPA-R), Differentiation of Self Inventory Revised (DSI-R) and Aggression Questionnaire (AQ) were used to measure the parental and peer attachment, differentiation of self and aggressive behavior, respectively. Results: The factors scores of IPPA-R were positively correlated with the DSI-R scores(r =0. 19 -0. 23, Ps <0. 01), while the scores of mother-child attachment and peer attachment in IPPA-R were negatively correlated with the AQ scores(r = -0. 31, -0. 19, Ps <0. 05). The DSI-R scores were negatively correlated with the AQ scores(r = -0. 57, P <0. 001). The scores of all the four factors of DSI-R could negatively predict the AQ scores (β = -0. 36- -0. 12, Ps <0. 05). The differentiation of self played a partial mediating role in the relationship of mother-child attachment with aggression behavior and the amount of the mediation effect accounted for 29. 3% of the total effect. The differentiation of self played a completely mediating role in the relationship between peer attachment and aggression behavior. Conclusion: The level of differentiation of self could predict the aggression behavior in middle school students. The differentiation of self is likely to be a mediator between not only mother-child attachment but also peer attachment and aggression behavior [ABSTRACT FROM AUTHOR]

This study focused on the representation of the belief states in conformant planning tasks. The state variables selection algorithm in the process of CPT-FDR generation is not enough to deal with the mutex conditions. This paper put forward a new method named MECV (mutually-exclusive-choose-variables). CPT-FDR did not think over the mutually-exclusive between initial belief states. It generated redundant information which reduced the efficiency of encoding. First, MECV used the useful positive and negative literal to make a new uncovered fact set. And then it took out the mutually exclusive literal from different real state which in the initial belief states to make a mutually-exclusive-group. Finally, it used the new uncovered fact set and mutually-exclusive-group encoding state variables. The outcomes of comparative experiments validate the effectiveness of the new algorithm. [ABSTRACT FROM AUTHOR]