نتایج جستجو برای: منبع جریان ac
تعداد نتایج: 89267 فیلتر نتایج به سال:
purpose: to determine anterior chamber depth (ac depth) changes during a 6 month period after phacoemulsification cataract surgery and foldable intraocular lens (iol) implantation. methods: in a cross-sectional study, 85 eyes of 85 patients were evaluated for ac depth and capsulo-rrhexis size one and six months after the procedure. results: patients included 44 male and 41 female subjects with ...
Time interleaved A/D converters (ADCs) can be used to increase the sample rate of an ADC system. However, a problem with time interleaved ADCs is that distortion is introduced in the output signal due to various mismatch errors between the ADCs. One way to decrease the impact of the mismatch errors is to introduce additional ADCs in the interleaved structure and randomly select an ADC at each s...
We introduce Action-Constrained Partially Observable Markov Decision Process (AC-POMDP), which arose from studying critical robotic applications with damaging actions. AC-POMDPs restrict the optimized policy to only apply feasible actions: each action is feasible in a subset of the state space, and the agent can observe the set of applicable actions in the current hidden state, in addition to s...
Matrix converter is basically direct three phase to three phase converter and it’s operation is based upon switching pattern of all nine switches, which are available in this converter. The output of ac converter is fed as the input of three phase induction motor. The performance of three phase matrix converter fed induction motor drive is analyzed by the switching pattern obtained by matrix co...
In calorimetry and particularly in heat capacity measurements, different characteristic relaxation time constants may perturb the experiment which cannot be considered at thermodynamic equilibrium. In this case, thermodynamics of irreversible processes has to be taken into account and the calorimetric measurements must be considered as dynamic. In a temperature modulated experiment, such as ac-...
چکیده ندارد.
امروزه موتورهای القایی ac، متداولترین نوع موتور مورد استفاده در صنعت می باشند. تقریباً 90 درصد موتورهای مورد استفاده در صنعت، موتور القایی می باشد. این موتورها در قالب موتورهای تک فاز و یا چندفاز و در محدوده توان های خروجی از چند وات تا چند هزار وات، مورد استفاده قرار می گیرند. ترکیب درایو تنظیم کننده سرعت (asd ) به همراه موتور القایی، سیستمی با بازدهی بالا را فراهم می-کند که می تواند برای محدود...
A proposal for energy management in an off-grid photovoltaic pumping and irrigation system is presented and evaluated for a specific case study. The system is assumed to be based on off-the-shelf components (photovoltaic panels, battery banks, DC/AC converters, relays, submergible pumps, etc.), with a microcontroller-based energy management system, deciding when to disconnect the load from the ...
We evaluated the ingestion of anti-sheep erythrocyte (anti-E) IgG- and IgM-coated sheep erythrocytes by murine peritoneal macrophages exposed to cefodizime, a new semisynthetic cephalosporin, and other antibiotics. Cefodizime enhanced the ingestion of anti-E IgG-coated erythrocytes by peritoneal macrophages from CD-1 and BALB/c mice in a dose-dependent manner, but had no effect on uncoated or I...
اینورتر متعامل با شبکه، یک مبدل dc/ac دو طرفه است که در ریز شبکه ها و منابع تولید پراکنده مبتنی بر اینورتر جهت انتقال توان از باس dc به باس ac و بالعکس مورد استفاده قرار می گیرد. اینورتر متعامل در باس ac به صورت همزمان به بار محلی و شبکه قدرت متصل می شود، در صورت عادی بودن وضعیت شبکه، توان با آن مبادله می کند و در غیر اینصورت از شبکه جدا شده و بار محلی را در حالت مستقل تغذیه می نماید. در ساخت...
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