هدف: بر اساس مطالعه، بسیاری از دانشجویان، سال اول دانشگاه را یکی دوره‌های زمانی پراسترس و چالش‌زای زندگی می‌دانند قادر به سازگاری مناسب با آن نیستند. مطالعه حاضر هدف شناسایی تجارب زیسته دانشجویان پایین در خصوص مشکلات چالش‌های انجام شد. روش: روش پژوهش کیفی نوع پدیدارشناسی بود. داده‌ها استفاده مصاحبه نیمه ساختاریافته جمع‌آوری شد رویکرد 7 مرحله‌ای کلایزی مورد تجزیه تحلیل قرار گرفت. جامعه کلیه آزاد...

This paper studies $(2 + 1)$-dimensional Heisenberg ferromagnetic spin chain model by using improved modified extended tanh-function method. Various types of solutions are extracted such as bright solitons, singular dark periodic solutions, Weierstrass elliptic type and exponential function solutions. Moreover, some the obtained represented graphically.

Let ? 2n be the set of paths with 2n steps of unit length in Z 2 , which begin and end at (0; 0). For 2 ? 2n , let area() 2 Z denote the oriented area enclosed by. We show that for every positive even integer k, there exists a rational function R k with integer coeecients, such that: 1 j? 2n j X 2?2n area()] k = R k (n); n > 2k: We calculate explicitly the degree and leading coeecient of R k. W...

This letter investigates the combination of the Chase-2 and sum-product (SP) algorithms for low-density parity-check (LDPC) codes. A simple modification of the tanh rule for check node update is given, which incorporates test error patterns (TEPs) used in the Chase algorithm into SP decoding of LDPC codes. Moreover, a simple yet effective approach is proposed to construct TEPs for dealing with ...

Multimodal biometric systems consolidate the evidence presented by multiple biometric sources and typically provide better recognition performance compared to systems based on a single biometric modality. Although information fusion in a multimodal system can be performed at various levels, integration at the matching score level is the most common approach due to the ease in accessing and comb...

Nonlinear evolution equations are widely used to describe complex phenomena in various sciences such as fluid physics, condensed matter, biophysics, plasma physics, nonlinear optics, quantum field theory and particle physics, etc. In recent years, various powerful methods have been presented for finding exact solutions of the nonlinear evolution equations in mathematical physics, such as, tanh ...