EngRN: Engineering Design Process (Topic)最新文献

{"title":"Tailored Mechanical Response and Mass Transport Characteristic of Selective Laser Melted Porous Metallic Biomaterials for Bone Scaffolds","authors":"Lei Zhang, B. Song, Lei Yang, Yusheng Shi","doi":"10.2139/ssrn.3563923","DOIUrl":"https://doi.org/10.2139/ssrn.3563923","url":null,"abstract":"Porous metallic biomaterials developed from pentamode metamaterials (PMs) were rationally designed to mimic the topological, mechanical, and mass transport properties of human bones. Here, A series of diamond-based PMs with different strut parameters were fabricated from a Ti-6Al-4V powder by selective laser melting (SLM) technique. The morphological features, mechanical properties and permeability of PM samples were then characterized. In terms of morphology, the as-built PMs were well consistent with the as-designed ones, although the slight surface deviations were presented in overhanging areas. The PM scaffolds showed a switchable deformation pattern controlled by the slenderness ratio of struts and volume fractions. The double-cone topology strut also increases the tortuosity and thereby accelerates the nutrients supply, waste removal, and cell migration to the whole scaffold region and circumambient bone tissue. The measured mechanical properties (i.e., E: 0.59-2.90 GPa, σy: 20.59-112.63 MPa) and computational permeability values (k: 9.87-49.19 x10-9 m2) of PM scaffolds are all in accordance with those of trabecular bone. The experimental permeability values were linearly dependent on the results of simulations. This study clearly shows the great potential of PMs as bone scaffolds. Moreover, we demonstrated that PM-based porous biomaterials can decouple the mass transport and mechanical properties of bone scaffolds, so as to achieve an unprecedented level of tailoring their multi-physics properties.","PeriodicalId":11974,"journal":{"name":"EngRN: Engineering Design Process (Topic)","volume":"1 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2020-04-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"87100532","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":"Efficient Protocol for Gender Identification using Machine Learning","authors":"Anupama Mishra, A. K. Daniel","doi":"10.2139/ssrn.3562888","DOIUrl":"https://doi.org/10.2139/ssrn.3562888","url":null,"abstract":"Gender identification of names is an important task to identify human beings. Gender identification uses many attributes as voice-based gender prediction, face-based, and many other attributes. The Natural Language Processing (NLP) is a technique which can identify easily and accurately. These identification problems can be classified through various techniques. The binary classification of gender is considered. The proposed model consists of Naive Bayes (NB), Decision Tree (DT), and Support Vector Machine (SVM) concepts for identifying the gender. The gender names an important key for identifying the gender based on the last character(s) of consonant/vowel features. The model supports the unigram, bigram, trigram, four-gram, and vowels postfix technique to identify the gender. The simulation result shows a better performance under unigram and bigram model compare to others.","PeriodicalId":11974,"journal":{"name":"EngRN: Engineering Design Process (Topic)","volume":"18 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2020-03-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"85468806","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":"Confrontation Between Structural and Thermal Properties of NiXTiX-YHfY .At% Ternary Alloys Obtained by Three Distinct Fusion Processes","authors":"Roniere Leite Soares","doi":"10.2139/ssrn.3584446","DOIUrl":"https://doi.org/10.2139/ssrn.3584446","url":null,"abstract":"The present research focused on the experimental results obtained for the NiXTiX-YHfY .at% (where X = 50; Y = Hf = 8, 11, 14, 17 and 20 .at%) substitutive alloys with shape memory effect (SME). The samples were fused by 3 different processes and subjected to X-Ray Diffraction (XRD) and differential scanning calorimetry (DSC) to demonstrate the differences between structural and thermal properties for equal compositions. In addition, chemically etched samples were used for surface observation in two types of microscopy: optical microscopy (OM) and scanning electron microscopy (SEM). The results derived from the three distinct processes were compared and discussed, confirming several significant differences in the properties studied here.","PeriodicalId":11974,"journal":{"name":"EngRN: Engineering Design Process (Topic)","volume":"47 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2020-03-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"87366844","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":"Polyethylene Glycol (Peg)-Assisted Synthesis of Self-Assembled Cactus-Like Nh4v3o8 for Lithium Ion Battery Cathode","authors":"Lingjiang Kou, Liyun Cao, Jianfeng Huang, Jiajia Song, Liangliang Feng, Yong Wang, Shaoyi Chen, K. Kajiyoshi","doi":"10.2139/ssrn.3546578","DOIUrl":"https://doi.org/10.2139/ssrn.3546578","url":null,"abstract":"Abstract Self-assembled cactus-like NH4V3O8 is prepared through polyethylene glycol (PEG)-assisted hydrothermal synthesis method. The samples are characterized by X-ray diffraction and scanning electron microscopy techniques. Adjusting the pH value of the solution can effectively control the morphology of NH4V3O8. The electrochemical measurements indicate that the sample which pH value is 3.7, shows the best cycling performance. It delivers an initial discharge capacity is 228 mAh g−1 and maintains at 156 mAh g−1 under 15 mA g−1 after 50 cycles. The proposed synthetic method can also be developed to address other electrode materials with inferior electronic conductivity and lithium ion diffusion.","PeriodicalId":11974,"journal":{"name":"EngRN: Engineering Design Process (Topic)","volume":"27 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2020-03-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"87303751","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":"Rare Disease Detection and Physician Targeting: A Factor Graph Machine Learning Approach for Niche Market Targeting","authors":"Yong Cai, Qiang Liu, Chao Shi, Yunlong Wang, Fan Zhang","doi":"10.2139/ssrn.3546969","DOIUrl":"https://doi.org/10.2139/ssrn.3546969","url":null,"abstract":"A rare disease is any disease that affects a small percentage of the population. The extremely low incidence rate of rare diseases makes it particularly difficult to recognize and diagnose them. A major challenge in the rare disease market is how to target physicians who are potentially involved with patients with a specific rare disease. The existing detection and targeting methods, such as segmentation and profiling, have been developed under an assumption of a large mass market and are thus not suitable for the rare disease market where the classification classes are extremely imbalanced. This paper proposes a factor graphical model approach to predict rare disease physician targets by jointly modeling physician and patient features from different data spaces and explicitly incorporating physician-patient relationship. Through an empirical application in detecting physicians treating hereditary angioedema using big medical claims and prescription data, the proposed approach demonstrates better performances than various benchmark models according to different performance metrics. The graph representation also allows for visual interpretation of the relationship between physicians and patients. This paper contributes to the literature on exploring the benefits of utilizing relational dependencies among entities in healthcare industry.","PeriodicalId":11974,"journal":{"name":"EngRN: Engineering Design Process (Topic)","volume":"212 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2020-03-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"76771121","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":"Development of Blind Frame Synchronization for Transfer System with Differential Space-Time Block Coding","authors":"M. Tokar","doi":"10.15587/2312-8372.2020.196277","DOIUrl":"https://doi.org/10.15587/2312-8372.2020.196277","url":null,"abstract":"The object of this research is the methods and algorithms for frame synchronization used in multi-antenna radio systems (Multiple Input Multiple Output – MIMO). The implementation of radio communication systems and, in particular, MIMO, implies that the demodulator synchronizes the phase of the reference carrier and the time of signal processing processes. Time synchronization is divided into symbolic and frame synchronization. As for the synchronization of the reference carrier and symbol synchronization, these types of synchronization are provided by traditional methods and are not considered in this paper. The frame synchronization in the vast majority of cases is provided by the use of pilot signals (sync words). At their core, they are markers and are periodically embedded in the data stream to indicate the beginning of another new data block. The resources of the transmission system, spent on the transmission of pilot signals, are not used to transmit user information, as a result of which the efficiency of using the time-frequency resource of the system is degraded. To a lesser extent, there are so-called « blind » signal processing methods based on the redundancy properties of the transmitted signal. These methods have no drawbacks from the use of pilot signals and are divided into methods for assessing the state of the communication channel, signal identification, and synchronization. Based on this, such methods are of practical interest. In this work, let’s propose a frame synchronization method for demodulating differential space-time block coding signals using MIMO technology. The synchronization algorithm does not require the use of preambles and sync words, which ensure efficient use of the time-frequency resource. An analysis of the structure of the algorithm and the simulation results show its performance at low signal-to-noise ratios in the transmission system. The algorithm does not require knowledge of the state of the communication channel, has low computational complexity compared to existing analogues, and allows implementation with a different number of transmitting and receiving antennas.","PeriodicalId":11974,"journal":{"name":"EngRN: Engineering Design Process (Topic)","volume":"45 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2020-02-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"89198497","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":"UA Tracer: An Application to Record User Activities on Windows Operating System","authors":"Siddhartha Sankar Biswas, H. Sharma, Vivudh Fore, Sumit Kumari","doi":"10.2139/ssrn.3545230","DOIUrl":"https://doi.org/10.2139/ssrn.3545230","url":null,"abstract":"Monitoring the real time activities performed by the third party on your personal computing device is a challenge. Task Management is the tool which is provided by an operating system using this we can monitoring the ongoing activities but we can not see that what time they were started on our system. The problem arises when we can not backtrack and see what are the application which had already been accessed on our system from which account activities were performed. We have proposed and implemented an application using for real time tracking and monitoring our personal device is possible. Malicious attempts on our system can also be monitored by this application. Using this we can also identify what were the application installed on our system for some specific purpose. Similarly, we are unaware about our kids activities on the system, so this application can easily help us to find out that at what time, date which application was used on the system. This application will provide us a platform to not only to find out suspicious attempt but also to protect privacy of system. Each time we run a program.","PeriodicalId":11974,"journal":{"name":"EngRN: Engineering Design Process (Topic)","volume":"44 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2020-02-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"76359211","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":"Experimental Studies on Properties of Sulfur Modified Binder With Aging","authors":"K. Priyadarsini, Jhunarani Ojha","doi":"10.34218/ijciet.11.2.2020.014","DOIUrl":"https://doi.org/10.34218/ijciet.11.2.2020.014","url":null,"abstract":"The bituminous pavement failure occurs due to excessive traffic loads and different climatic conditions. To protect the pavement failure one of the measure is to enhance the properties of bitumen and its quality and it may achieved by modification of the bitumen. In this research work, sulfur is used as modifier due to it’s readily availability in local market with less cost. The huge production of sulfur from petrochemical as well as gas, oil refining industries in our country with less utilization should be the main encouraging source for using it as modifier. The addition of sulfur with bitumen can improve the characteristics as well as physical properties of bitumen. Inside the research, sulfur is being mixed with virgin bitumen (1 to 9% with increasing 1% by total weight of binder) at a specified mixing time and temperature. The aging effect of virgin and SMB is also discussed through carrying out “Rolling thin-film oven (RTFO) and Pressure aging vessel (PAV) tests”. The outcome of the present investigations represents that the bitumen binder becomes harder after modification with sulfur producing appropriate results as per provision of code but the aging of modified binder not becoming much harder as compared with virgin bitumen and it also satisfying the guidelines.","PeriodicalId":11974,"journal":{"name":"EngRN: Engineering Design Process (Topic)","volume":"8 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2020-02-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"75026764","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":"Room Temperature Recovery of Cryogenically Deformed Aluminium Alloys","authors":"B. Gruber, F. Grabner, G. Falkinger, A. Schökel, F. Spieckermann, P. Uggowitzer, S. Pogatscher","doi":"10.2139/ssrn.3539254","DOIUrl":"https://doi.org/10.2139/ssrn.3539254","url":null,"abstract":"Abstract Increased formability of aluminium alloys has been demonstrated via cryogenic deformation. In previous studies, the microstructures of samples deformed at low temperatures were analysed after reheating to room temperature (RT) and storage. However, after heating the dislocation structure and density of the deformed material do not reflect the cryogenic situation. In this work, we investigate the evolution of flow stress during recovery in Al-Mg and Al-Mg-Si alloys. We examine the RT recovery behaviour of samples pre-strained at 77 K to different strain levels, and evaluate the structural stability upon subsequent deformation. We also study microstructural evolution via in-situ synchrotron X-ray diffraction, starting from initial conditions at cryogenic temperatures to long-term RT-recovery. Recovery of cryogenically deformed samples at RT results in reduction of the flow stress, in dependence on RT storage. The recovery process can be divided into three distinct sections, each based on a different mechanism characterized by either the arranging or the annihilation of dislocations. Subsequent further straining at room temperature after cryogenic forming also generates plastic instabilities and premature fracture due to unfavourable hardening and recovery assisted softening interplay.","PeriodicalId":11974,"journal":{"name":"EngRN: Engineering Design Process (Topic)","volume":"38 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2020-02-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"75779642","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":"Antibacterial Bionic Surface on Intraocular Lenses to Prevent PCO and Endophthalmitis Through Surface-Initiated RAFT Polymerization","authors":"He Zhang, Xuemei Zhang, Zheng Kuang, Yingying Jin, Renjie Miao, Shuaiyue Pang, Hao Chen, Dan-dan Lin, Siyuan Qian, Yuqin Wang, Lu Wang, Bailiang Wang","doi":"10.2139/ssrn.3539205","DOIUrl":"https://doi.org/10.2139/ssrn.3539205","url":null,"abstract":"Antifouling and antibacterial intraocular lenses (IOLs) are required to lower the incidence of posterior capsule opacification (PCO) and postoperative endophthalmitis. Bionic zwitterionic polymer such as 2-methacryloyloxyethyl phosphorylcholine (MPC) shows excellent biocompatibility and strong ability to resist nonspecific proteins and bacterial adhesion. In this work, a novel bionic brushes coating containing MPC and N, N, N-trimethyl-2-((4-(2-(4-nonylphenoxy) ethoxy)-4-oxobut-2-enoyl) oxy) ethan-1-aminium chloride (TOEAC), a quaternary ammonium monomer, was prepared onto IOLs using reversible addition-fragmentation chain transfer (RAFT) polymerization method. The success of surface modification was investigated by spectroscopic ellipsometry, water contact angle, Fourier transform infrared spectroscopy, and X-ray photoelectron spectroscopy. The P(TOEAC-co-MPC) brushes functionalized IOL exhibited excellent antifouling efficiency against bovine serum albumin, Staphylococcus aureus, and human lens epithelial cells. In addition, the P(TOEAC-co-MPC) brushes showed excellent antibacterial and antibiofilm abilities and good biocompatibility. Anin vivo study confirmed that the P(TOEAC-co-MPC) brushes effectively prevented PCO and endophthalmitis. Consequently, the P(TOEAC-co-MPC) bionic brushes are promising for IOLs surface modification to resist postoperative complications for long-term implantation.","PeriodicalId":11974,"journal":{"name":"EngRN: Engineering Design Process (Topic)","volume":"15 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2020-02-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"81357768","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}