The container crane is a key machine in ports. Over the past 15 years, modeling and control of quay cranes for automating ports has been the main research issue. In this paper, crane models and control methodologies appeared in the literature are reviewed. A generalized formulation of the most widely used crane model is introduced. Various control techniques are briefly discussed. In conclusion...

Overloading is a method to extend capacity limitation of multiple access techniques. The system becomes overloaded, when the number of users exceeds the signal dimensions. One of the efficient schemes to overload a CDMA system is to use two sets of orthogonal signal waveforms (O/O). In this paper, the BER performance of a new overloading scheme using scrambled orthogonal Gold code (OG/OG) sets ...

A general homomorphic overloading in a first-order type system is discussed. Type inference is applied within predefined classes each containing an arbitrary first-order subtyping hierarchy. We propose a computationally efficient type inference algorithm by converting the attendant constraint-satisfaction problem into the algebraic path problem for a constraint graph weighted with elements of a...

Overloading allows several function definitions for the same name, distinguished primarily through different argument types; it is typically resolved at compile-time. Inheritance allows subclasses to define more special versions of the same function; it is typically resolved at run-time. Modern object-oriented languages incorporate both features, usually in a type-safe manner. However, the comb...

This thesis is concerned with investigating an approach for adding problem notation to a computer language. A method is proposed for modifying a programming language to fit problem notation by including the capability of defining a problem specific set of symbols or operators in the language. The proposed method for extending a language uses operator overloading to map language operations to th...

Quartz is a new declarative hardware description language with polymorphism, overloading, higher-order combinators and a relational approach to data flow, supporting formal reasoning for design verification in the same style as the Ruby language. The combination of parametric polymorphism and overloading within the language involves the implementation of a system of constrained types. This pape...

Channel overloading, which refers to accommodating a larger number of users on a channel than can be achieved with orthogonal signaling, is currently a very hot topic for future wireless systems. A number of approaches have been described in the literature, and the most efficient of them use several sets of orthogonal signal waveforms. Multiuser interference, which is inherent to channel overlo...

Foundation of tower crane serves to ensure stability against vertical and horizontal forces. If foundation stress is not sufficient, tower crane may be subject to overturning, shearing or foundation settlement. Therefore, engineering review of stable support is a highly critical part of foundation design. However, there are not many professionals who can conduct engineering review of tower cran...

Intelligent tower crane has large structure deadweight. The service life of the whole machine is dependent on the life of the structure. As a result, the metal structure should be designed by using correct and reasonable methods to obtain excellent fatigue properties. And it can guide the design, manufacturing, use and maintenance process for crane. And it has great significance to prevent the ...

Abstract: Crane hook is a curved beam. Hooks are employed in heavy industries to carry tones of loads safely. These hooks have a big role to play as far as the safety of crane loaded is concerned. With more and more industrialization the rate at which these hooks are forged are increasing. This project is carried out to study the stress variation in crane hooks for different cross sections such...