نتایج جستجو برای: d33
تعداد نتایج: 306 فیلتر نتایج به سال:
چکیده: موضوع توزیع درآمد عواملی و تاثیر آن بر نابرابری، در ادبیات کلاسیک اقتصادی از ارکان اصلی مطالعات بوده است. اما با تکیه اقتصاددانان قرن بیستم اعم از کینزی ها و نئوکلاسیک ها بر ثبات سهم عوامل این بحث از رونق می افتد. در نهایت پساکینزی ها ضمن قبول امکان تغییر در سهم عوامل، ارتباط توزیع درآمد شخصی و عواملی را رد می کنند. نوشته ی حاضر با احتساب کارگران غیر ماهر در معادلات بازار کار، با رد نظ...
Enhanced functionality of electro-optic devices by implementing piezoelectric micro fibers into their construction is proposed. Lanthanum-modified lead zirconate titanate (PLZT) ceramics are known to exhibit high light transparency, desirable electro-optic properties and fast response. In this study PLZT fibers with a diameter of around 300 microns were produced by a thermoplastic processing m...
Plastic ionic molecular crystals are a novel class of materials that have attracted recent interest due to the discovery ferroelectric and piezoelectric properties together with an orientationally disordered mesophase high plasticity. Despite growing interest, little is known about mechanisms underpin their properties. To address this knowledge gap, we use density functional theory calculations...
Imported breeds raised in tropical countries demand greater use of chemical control ectoparasites, however, this practice can compromise the results biotechnologies reproduction. Thus, objective study was to evaluate presence residues tick or their metabolites blood and follicular fluid verify vitro embryo production (IVEP) Wagyu cows, a country, submitted fluazuron based treatment. Twenty adul...
Both flexoelectricity and piezoelectricity belong to the electromechanical coupling effect. While only exists in materials whose crystal structure is noncentrosymmetric a pre-polarization process necessary for ferroelectric piezoelectric ceramics, theoretically all dielectric does not require pre-polarization. However, this mean that would be affected by process, considering polarization phenom...
The road is an infrastructure in the flow of traffic, Raya Rasau Jaya section was damaged, with light, medium and heavy damage. One way to determine condition damage Pavement Condition Index (PCI) method. purpose this study determine, identify calculate value that occurs using PCI method know handling used PCI, results field analysis values calculated by method, recommendations for repairs Asph...
Active Lamb wave detection is an effective and simple monitoring method for structural health (SHM). Piezoelectric lead zirconate titanate (PZT) ceramics are most commonly used as transducers to excite receive wave. However, due their hardness, thickness brittleness, PZT severely limited in detecting damage on curved surface structures. Herein, we report that flexible film sensor excellent cand...
In this study, a series of solid solutions (1−x)BaTiO3-xCa(Sn1/2Zr1/2)O3 (abbreviated as (1−x)BT-xCSZ, x = 0.00–0.15) ceramics have been prepared by the conventional solid-state reaction method to search for high performance lead-free piezoelectric materials. The structural evolution, microstructure, and properties are investigated. X-ray diffraction (XRD) results indicate that phase symmetry s...
مواد فروالکتریک پایه سربی و علی الخصوص pb(zrti)o3 به علت دارا بودن خواص پیزوالکتریک عالی دارای کاربردهای وسیعی در عملگرها ، حسگرها و مبدل های پیزوالکتریک هستند. از طرفی، بیش از 60 درصد وزنی این ترکیبات را سرب تشکیل می دهد. با در نظر گرفتن سمی بودن سرب تلاش های فراوانی به منظور گسترش موادی سازگار با بدن و محیط زیست صورت گرفته است. در این پژوهش سرامیک نایوبات پتاسیم-سدیم (knn) به عنوان مهمترین خا...
High-power infrared laser systems with broadband tunability are of great importance due to their wide range applications in spectroscopy and free-space communications. These require nonlinear optical (NLO) crystals for wavelength up/down conversion using sum/difference frequency generation, respectively. NLO need satisfy many competing criteria, including large susceptibility, induced damage th...
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