scholarly journals Synthetic granite composite for precision equipment structures

2018 ◽  
Vol 23 (4) ◽  
Author(s):  
João Fiore Parreira Lovo ◽  
Marcos Paulo Gonçalves Pedroso ◽  
Rogério Erbereli ◽  
Benedito de Moraes Purquerio ◽  
Carlos Alberto Fortulan
Keyword(s):  
Precision Equipment

Multi-objective optimization of composite two-stage vibration isolation system for sensitive equipment

2016 ◽  
Vol 14 (2) ◽  
pp. 343-361
Author(s):  
Wei Huang ◽  
Jian Xu ◽  
Dayong Zhu ◽  
Cheng Liu ◽  
Jianwei Lu ◽  
...  
Keyword(s):  
Thin Plate ◽  
Vibration Isolation ◽  
Composite System ◽  
Optimization Technique ◽  
Two Stage ◽  
Isolation System ◽  
Vibration Isolation System ◽  
Content Type ◽  
Multi Objective ◽  
Precision Equipment

Purpose The purpose of this paper is to propose a novel strategy of optimal parameters configuration and placement for sensitive equipment. Design/methodology/approach In this study, clamped thin plate is considered as the foundation form, and a novel composite system is proposed based on the two-stage isolation system. By means of the theory of mechanical four-pole connection, the displacement amplitude transmissibility from the thin plate to precision equipment is derived. For the purpose of performing optimal design of the composite system, a novel multi-objective idea is presented. Multi-objective particle swarm optimization (MOPSO) algorithm is adopted as an optimization technique, which can achieve a global optimal solution (gbest), and selecting the desired solution from an equivalent Pareto set can be avoided. Maximum and variance of the four transmitted peak displacements are considered as the fitness functions simultaneously; the purpose is aimed at reducing the amplitude of the multi-peak isolation system, meanwhile pursuing a uniform vibration as far as possible. The optimization is mainly organized as a combination of parameter configuration and placement design, and the traversal search of discrete plate is performed in each iteration for the purpose of achieving the global optimum. Findings An important transmissibility based on the mechanical four-pole connection is derived, and a composite vibration isolation system is proposed, and a novel optimization problem is also defined here. This study reports a novel optimization strategy combined with artificial intelligence for parameters and placement design of precision equipment, which can promote the traditional view of two-stage vibration isolation. Originality/value Two-stage vibration isolation systems are widely applied to the vibration attenuation of precision equipment, but in these traditional designs, vibration participation of foundation is often ignored. In this paper, participation of foundation of equipment is considered, and a coherent new strategy for equipment isolation and foundation vibration is presented. This study shows a new vision of interdisciplinary including civil engineering, mechanical dynamics and computational science.

scholarly journals Analisis Pengaruh Produk, Harga, Dan Promosi Terhadap Keputusan Pembelian Produk Implant Orthoepedi (ZIMMER) Pada PT.Gana Semesta Mandiri

2014 ◽  
Vol 1 (01) ◽  
Author(s):  
Sofian Kurniata
Keyword(s):  
Puerto Rico ◽  
Structural Equation Model ◽  
Random Sampling ◽  
Structural Equation ◽  
Fortune 500 ◽  
Equation Model ◽  
Precision Equipment ◽  
Fortune 100

Stryker, diantara Zimmer dan Smith & Nephew, adalah salah satu perusahaan manufaktur implant ortopedi terkemuka di dunia. Sejarah perusahaan dimulai tahun 1941 ketika Dr Homer Stryker membentuk perusahaan ortopedi dan menjadi satu-satunya pemegang saham sebanyak 5.000 saham, senilai $ 20.000.Stryker beroperasi di 89 negara di seluruh dunia. Amerika adalah pasar utama perusahaan, sedangkan sisanya dari dunia mewakili 35% dari pangsa penjualan. Stryker berkantor pusat di Michigan dan sebagian besar fasilitas manufaktur berlokasi di Amerika Serikat. Namun, Stryker mengoperasikan pabrik di Jerman, Swiss, Prancis, Irlandia, Cina, Georgia, dan Puerto Rico. Dua area bisnis utama adalah implan ortopedi (59%) termasuk implan pinggul, implant lutut, sistem implan craniomaxillofacial, implan tulang belakang, implan trauma, semen tulang dan, peralatanMedSurg (41%) termasuk peralatan bedah dan sistem navigasi, endoscopic dan sistem komunikasi, produk perangkat medis dan peralatan gawat darurat.Stryker berada di peringkat  ke 323 perusahaan terbesar di Amerika Serikat pada tahun 2011 (Fortune 500, 2011), perusahaan yang paling inovatif ke-95 dunia (Forbes "perusahaan paling inovatif di dunia", 2011), peringkat ketiga di dunia yang paling dikagumi Perusahaan di Kedokteran & Lainnya Precision Equipment (Fortune "perusahaan dunia Paling dikagumi", 2011), dan menduduki peringkat ke-68 perusahaan terbaik untuk bekerja (Fortune"100 perusahaan terbaik untuk bekerja", 2011). Penjualan Stryker telah terus meningkat selama 31 tahun dan mencapai 7,3 miliar dolar pada tahun 2010. Tingkat pertumbuhan tahunan gabungan dalam penjualan adalah sebesar 20% untuk periode 31 tahun. Dari hasil pengujian terhadap model pada penelitian ini, dengan menggunakan random sampling, analisis structural equation model (SEM), dan bantuan software Amos 20, pada 100 responden,  mampu menjelaskan hubungan faktor promosi, harga, dan produk terhadap keputusan pembelian di PT. Gana Semesta Mandiri. Pada penelitian ini, didapat 1). Produk  berpengaruh terhadap keputusan pembelian. 2). Harga berpengaruh terhadap keputusan pembelian. 3). promosi  berpengaruh terhadap keputusan pembelian. pada PT. Gana Semesta Mandiri. Hal ini menunjukkan bahwa produk, harga dan promosi yang baik yang terdapat di PT. Gana Semesta Mandiri Surabaya secara bersama bila dikelola dengan baik, akan dapat meningkatkan keputusan pembelian konsumen.Kata kunci: PT. Gana Semesta Mandiri, produk, harga, promosi, keputusan pembelian

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