DEStech Transactions on Materials Science and Engineering最新文献

{"title":"The Model of Urban Sewage Treatment under Possibility Measure","authors":"Cunlin Li, Lin Zhang, Zhifu Jia","doi":"10.12783/DTMSE/AMSEE2017/14284","DOIUrl":"https://doi.org/10.12783/DTMSE/AMSEE2017/14284","url":null,"abstract":"This paper was investigated the pro blem of urban sewage treatment under the possibility theory. An expected revenue decision model of urban sewage treatment with penalty parameter was established. Based on the possibility measure, the model was transformed into an equivalent nonlinear cons trained optimization model, and the existence of solutions of the model was proved. An example was given to verify the existence of solutions.","PeriodicalId":11124,"journal":{"name":"DEStech Transactions on Materials Science and Engineering","volume":"17 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2017-10-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"73699764","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Study on Precipitation Treatment of Ammonia Nitrogen in the Wastewater from Ethanol Production Using Cassava","authors":"Jing Liu, Juan Tang, Hua Yang, Yan-sa Zhang, Boya Li, D. Bian","doi":"10.12783/DTMSE/AMSEE2017/14280","DOIUrl":"https://doi.org/10.12783/DTMSE/AMSEE2017/14280","url":null,"abstract":"Ammonia nitrogen in the wastewater from ethanol production using cassava was removed by precipitation method in the paper. It was studied that the varieties and dosages of precipitants, pH value and reaction time have an effect on removal of ammonia nitrogen. The experimental results indicated that the removal rate of ammonia nitrogen is able to reach 93.7% under the condition of a pH of 9, MgCI2·6H2O and Na2HPO4·12H2O as precipitants and 30 minutes of reaction time. The mole rate of Mg2+ / NH4+ / PO43is 1.4 / 1 / 1.2. Meanwhile the obtained precipitate NH4MgPO4·6H2O, also called struvite, could be made use of compound fertilizer. Introduction Excess discharge of ammonia nitrogen in the wastewater is a significant cause of eutrophication of water bodies. This kind of wastewater pollution to the environment have to be economically and effectively controlled, which is a problem that should be solved quickly for chemical industry and environmental protection industry. At present, there are many technical methods for treatment of ammonia nitrogen wastewater. Chemical precipitation method have attracted tremendous attention because of the short reaction time, simple technological process, high removal efficiency and reaction product magnesium ammonium phosphate (MAP) being able to used as controlled release fertilizer for recycle of ammonia nitrogen.[1, 2] Ammonia nitrogen in wastewater is removed by chemical precipitation method, in which precipitant Mg2+ and PO43reacts with NH4+ in wastewater to generate precipitate in the form of complex salt NH4MgPO4·6H2O known as struvite. Interiorly, there are precedents for the treatment of the high-concentration ammonia nitrogen wastewater using MAP precipitation method [3-6]. However, few research on the removal of ammonia nitrogen in the wastewater from ethanol production using cassava by precipitation method have been reported. In this paper, it have been studied that the high-concentration ammonia nitrogen wastewater from ethanol production using cassava as raw materials in a factory in Henan was treated by MAP precipitation method. Also, the conditions of removal of ammonia nitrogen in the wastewater were optimized and a satisfactory result was obtained finally. Experimental Materials The wastewater used in the experiment were obtained from a factory in Henan, in which applied cassava as raw materials for ethanol production. The water quality indexes of the wastewater and analytical techniques are shown in table 1.","PeriodicalId":11124,"journal":{"name":"DEStech Transactions on Materials Science and Engineering","volume":"31 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2017-10-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"74554426","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Study on Oil Spill Risks at STS Anchorage of Pearl River Estuary","authors":"Rong-Chang Chen","doi":"10.12783/DTMSE/AMSEE2017/14288","DOIUrl":"https://doi.org/10.12783/DTMSE/AMSEE2017/14288","url":null,"abstract":"This paper discusses factors of two aspects deciding the risk level of spill accidents from ship to ship transfer (STS) at anchorage. The direct and indirect causes influencing the occurrence probability of an accident are studied and analysis is focused on the types of spilled oil that results in severe consequence after any spill accident, sensitivity of environment-sensitive resources to oil spillage and the impact level, and factors influencing the emergency response etc. With the Oilmap model, 600 random simulations were made on spill accidents that may possibly occur at the STS anchorage of Pearl River Estuary and the impact level of oil spill accidents on sensitive areas. On the basis of analysis on risk factors, predicted results and the characteristics of STS operations, risk prevention measures that can reduce the occurrence probability of oil spill and mitigate the accident consequences are proposed.","PeriodicalId":11124,"journal":{"name":"DEStech Transactions on Materials Science and Engineering","volume":"34 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2017-10-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"81702265","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Modeling and Testing on Material Removal Mechanism of Rotary Ultrasonic Machining","authors":"Linlin Li, Y. Zhu","doi":"10.12783/dtmse/amsee2017/14279","DOIUrl":"https://doi.org/10.12783/dtmse/amsee2017/14279","url":null,"abstract":"The technology of rotary ultrasonic machining is the combination of regular ultrasonic vibration and rotation motion. It applies a pre-load on the tool through tool head with an axial direction vibration and high rotation motion along with the ultrasonic system. The material removal mechanism of rotary ultrasonic machining, a model setup of efficiency on material removal and machining influence on different processing parameters are analyzed in this article. By comparing four different materials PZT Piezoelectric Ceramics, organic glass, glass steel and red cooper on single ultrasonic and rotary ultrasonic machining testing, the stabilization of machining process and efficiency of machining was analyzed on rotary ultrasonic machining as well. The testing proves that the rotation motion can significantly improve the ultrasonic machining efficiency on fracture toughness material. Introduction Rotary ultrasonic machining is the new method of machining, which is combination of the motion of rotation and traditional ultrasonic machining [1]. It utilizes the composite reaction between the force of mechanical rotation during the grinding and cutting machining and high frequency of ultrasonic vibration. It not only overcomes the lower machining efficiency caused by single ultrasonic and avoids the high wearing resistance of grinding and cutting head[2], but also saves the suspension liquid of grinding particles. For the machining material, there is no requirement of material hardness and electrical conductivity [3]. The low reaction of thermal physical and effective avoiding thermal damage and micro cracks have a high application value in the machining of fracture toughness material. However, there is no clear conclusion on the efficiency of machining processing parameters for rotary ultrasonic machining. An efficiency model of material removal mechanism of rotary ultrasonic machining is set up, and the testing result of the influence of different materials for this machining method is analyzed in this article. Material Removal Mechanism of Rotary Ultrasonic Machining In Fig.1, rotary ultrasonic machining is applied the mechanical machining cutting liquid on the surface of tool and high frequency of ultrasonic vibration on the tool head and make a rotation around itself. The tool head is supplied by a constant pressure or speed by the tool. During the machining, on the one hand, the surface particles is hitting the tool with a high frequency under the ultrasonic[4], on the other hand, the high rotation of ultrasonic spindle under the electrical motor is forcing the mechanical cutting in the contact area between the cutting part and tool. Then the material removal mechanism is implemented under these two reasons [5]. The indentation occurs on the surface of part under the high frequency vibration hitting and then it continues to develop cracks as Fig. 2 (a). At the meantime, under the rotation of tool head, the particles scratch and damage the part surfac","PeriodicalId":11124,"journal":{"name":"DEStech Transactions on Materials Science and Engineering","volume":"10 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2017-10-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"80436461","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Industrial Noise in Measurement and Statistical Terms in Poland","authors":"Z. Łukasik, A. Kuśmińska-Fijałkowska, J. Kozyra","doi":"10.12783/DTMSE/AMSEE2017/14293","DOIUrl":"https://doi.org/10.12783/DTMSE/AMSEE2017/14293","url":null,"abstract":"The main sources of noise are activities related to machines, devices, means of transport and technological processes. In the event of exceeding permissible noise norm, an employer is obliged to adapt to specific safety rules. Otherwise, noise may have detrimental effects on human health. The attempts made by the European Union and Poland to coordinate the fight with noise is at an early stage. They include determination and standardization of methodology of measurement of noise in the EU, that is, examining the current state of acoustic climate and creating database and implementing instruments reducing noise. The authors of this article presented industrial noise in measurement and statistical terms. The results of the research on industrial noise during the daytime and at night and exceeding of permissible levels of noise expressed by the indicators LAeq D, LAeq N were presented in this article.","PeriodicalId":11124,"journal":{"name":"DEStech Transactions on Materials Science and Engineering","volume":"21 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2017-10-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"81743448","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Effects of Precursor Preparation Methods on the Electrical Properties of Cathode Materials for Lithium Ion Batteries","authors":"Yong Zhao, Zou, Shuai Liu","doi":"10.12783/dtmse/amsee2017/14272","DOIUrl":"https://doi.org/10.12783/dtmse/amsee2017/14272","url":null,"abstract":"Four kinds of p recursor powders were synthesized from hydroxide coprecipitation and carbonate coprecipitation method s , then the LiNi 1/3 Mn 1/3 Co 1/3 O 2 was prepared by high temperature calcination, and the precipitating agents were sodium bicarbonate, sodium hydroxide (forward and reverse), sodium hydroxide and ammonia. The effects of precur sor preparation methods on the electrical properties of cathode materials for lithium ion batteries were systematically investigated by means of X ray diffraction, scanning electron microscopy and electrochemical performance measurements. The results showe d that the LiNi 1/3 Mn 1/3 Co 1/3 O 2 particles obtained by carbonate co precipitation method were spherical, and the morphology of the precipitated product was similar to that obtained by sodium hydroxide and ammonia. In the voltage range of 3– 4.3 V, the delivered discharge capacities of 1- 1, 1- 2, 1- 3 and 1- 4 at 1C were 147.0, 145.8, 140.2, 138.1 mAh g- 1, respectively. After 50 cycles, the capacity retention ratios were 92%, 89.9%, 85.2%, and 82.1%, respectively.","PeriodicalId":11124,"journal":{"name":"DEStech Transactions on Materials Science and Engineering","volume":"23 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2017-10-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"81773455","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Aggregation World University Ranking Based on HITS","authors":"Yang Zhang, Yu Xiao, Jun Wu","doi":"10.12783/DTMSE/AMSEE2017/14313","DOIUrl":"https://doi.org/10.12783/DTMSE/AMSEE2017/14313","url":null,"abstract":"Numerous university rankings have been propo sed in recent decades. Different methodology and indicators lead t he remarkable divergence among various rankings which confuses decisionmakers. In this pape r, we analyzed the difference between four wellknown world university rankings and confirm that the huge divergence makes it difficult to choose only one ranking as a standard. To solve this problem , we propose to generate a comprehensive world university ranking by aggregating existing individual university rankings using Hyperlink- induced topic search algorithm. It is shown that the ag gregated ranking just likes a ‘ cocktail ’ consisting of all the information from individual university rankings and can ef ficiently eliminate the outliers and regional partiality as a “ smoothe r ” .","PeriodicalId":11124,"journal":{"name":"DEStech Transactions on Materials Science and Engineering","volume":"24 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2017-10-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"78665859","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"An Exploratory Study on Heterogeneity of Organizational Communication Network with Department Feature","authors":"Jing-shu Wu, H. Deng, Song Yang","doi":"10.12783/dtmse/amsee2017/14308","DOIUrl":"https://doi.org/10.12783/dtmse/amsee2017/14308","url":null,"abstract":"Department is a distinctive label in organizational activities. To explorer the heterogeneity of organizational communication network combined with departmental feature, we build organizational communication network according to organization’s office automation system logs. On this basis, some concepts are proposed to depict inter-departmental and intra-departmental communication behaviours, which can tell the differences of function and character between departments. A certain organization is taken as an example to show the feasibility of the method.","PeriodicalId":11124,"journal":{"name":"DEStech Transactions on Materials Science and Engineering","volume":"72 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2017-10-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"86268784","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Preparation of Vanillin Modified Poly(Vinyl Alcohol )/ Ag C omposite for Food Packaging","authors":"Lin Cheng, M. Lin, Qian Tang, Daiwei Zhuang, Ya-han Wang, Liangbiao Fan","doi":"10.12783/DTMSE/AMSEE2017/14253","DOIUrl":"https://doi.org/10.12783/DTMSE/AMSEE2017/14253","url":null,"abstract":"Film packaging preservation method is a new simple storage preservation method introduced in recent years, the effect of film preservation depends mainly on the choice of film material composition and film- forming method. The results show that polyvinyl a lcohol/silver (PVA/Ag) composite film has some antibacterial properties, but it has not been reported to use this film for the preservation of agricultural products. Vanillin was used as crosslinker to improve the properties of the composites. The effect of crosslinker agent dosage, reaction time, film forming pH and film forming temperature were studied . The properties of PVA/Ag/V composite s were characterized by FTIR and XRD. The results show that the neutral reaction environment and the short reaction time are not conducive to the formation of hydrogen bonds in polymer materials with low crosslinker content.","PeriodicalId":11124,"journal":{"name":"DEStech Transactions on Materials Science and Engineering","volume":"87 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2017-10-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"86431914","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"The Formation of Ti3Alp/Ti-6Al-4V Surface Layer via Additive Friction Stir Processing Method","authors":"B. Li","doi":"10.12783/DTMSE/AMSEE2017/14294","DOIUrl":"https://doi.org/10.12783/DTMSE/AMSEE2017/14294","url":null,"abstract":"","PeriodicalId":11124,"journal":{"name":"DEStech Transactions on Materials Science and Engineering","volume":"1 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2017-10-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"88912671","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}