H Sharifi - Academia.edu (original) (raw)
Papers by H Sharifi
Radiotherapy and oncology : journal of the European Society for Therapeutic Radiology and Oncology, 2013
Dynamic contrast-enhanced CT (DCE-CT) quantifies vasculature properties of tumors, whereas static... more Dynamic contrast-enhanced CT (DCE-CT) quantifies vasculature properties of tumors, whereas static FDG-PET/CT defines metabolic activity. Both imaging modalities are capable of showing intra-tumor heterogeneity. We investigated differences in vasculature properties within primary non-small cell lung cancer (NSCLC) tumors measured by DCE-CT and metabolic activity from FDG-PET/CT. Thirty three NSCLC patients were analyzed prior to treatment. FDG-PET/CT and DCE-CT were co-registered. The tumor was delineated and metabolic activity was segmented on the FDG-PET/CT in two regions: low (<50% maximum SUV) and high (≥50% maximum SUV) metabolic uptake. Blood flow, blood volume and permeability were calculated using a maximum slope, deconvolution algorithm and a Patlak model. Correlations were assessed between perfusion parameters for the regions of interest. DCE-CT provided additional information on vasculature and tumor heterogeneity that was not correlated to metabolic tumor activity. The...
IEEE Transactions on Advanced Packaging, 2007
This paper presents a polymer-based wafer-level integration technology suitable for integrating R... more This paper presents a polymer-based wafer-level integration technology suitable for integrating RF and mixed-signal circuits and systems. In this technology, disparate dies can be integrated together using a batch fabrication process. Very high density die-to-die interconnects with widths currently as small as 25 m are implemented. To demonstrate the capabilities of this technology, a 10-GHz receiver front-end implemented in 0.18-m CMOS technology is integrated with a high-resistivity Si substrate and embedded passives. By adjusting the input matching of the receiver using the embedded passives fabricated on the high-resistivity Si substrate, the input matching and conversion gain of the front-end receiver are improved.
IEEE Congress on Evolutionary Computation, 2010
Standard genetic algorithms are not very suited to problems with multivariate interactions among ... more Standard genetic algorithms are not very suited to problems with multivariate interactions among variables. This problem has been identified from the beginning of these algorithms and has been termed as the linkage learning problem. Numerous attempts have been carried out to solve this problem with various degree of success. In this paper, we employ an effective algorithm to cluster a dependency structure matrix (DSM) which can correctly identify the linkage groups. Once all the linkage groups are identified, a simple genetic algorithm using BB-wise crossover can easily solve hard optimization problems. Experimental results with a number of deceptive functions with various sizes presented to show the efficiency enhancement obtained by the proposed method. The results are also compared with Bayesian Optimization Algorithm, a well-known evolutionary optimizer, to demonstrate this improvement.
Fatigue & Fracture of Engineering Materials & Structures, 2009
The effect of martensite morphology on the impact and tensile properties of dual phase steels wit... more The effect of martensite morphology on the impact and tensile properties of dual phase steels with a 0.25 volume fraction of martensite (V m) under different heat treatments was investigated. These treatments are direct quenching (DQ) and step quenching (SQ) that result in different microstructures and mechanical properties. To process dual phase steels, a low carbon manganese steel was used. At first the banding present in the initial steel was eliminated, then the two different heat treatments were applied. To reach a 0.25 volume fraction of martensite a variation of intercritical annealing temperatures was adopted for both treatments that allowed the evolution of different volume fraction of martensite. Phase analysis showed that an intercritical temperature of 725 • C (between A 3 , A 1) gives the desired 0.25 V m of martensite. A comparison of impact, tensile and ductile-brittle transition temperature (DBTT) indicates that the microstructure of the direct treatment has a better toughness. The DBTT for the DQ and SQ treatment is −49 and −6 • C, respectively. Keywords dual phase steels; fixed volume fraction of martensite; impact properties; toughness.
(English) The objective of this experiment was to study and changing the payment system of sugar ... more (English) The objective of this experiment was to study and changing the payment system of sugar beet in the autumn sowing from a linear to regressive equation for sugar content of 10 to 24 percentages based on the technical quality and recoverable sugar in ...
Radiotherapy and oncology : journal of the European Society for Therapeutic Radiology and Oncology, 2013
Dynamic contrast-enhanced CT (DCE-CT) quantifies vasculature properties of tumors, whereas static... more Dynamic contrast-enhanced CT (DCE-CT) quantifies vasculature properties of tumors, whereas static FDG-PET/CT defines metabolic activity. Both imaging modalities are capable of showing intra-tumor heterogeneity. We investigated differences in vasculature properties within primary non-small cell lung cancer (NSCLC) tumors measured by DCE-CT and metabolic activity from FDG-PET/CT. Thirty three NSCLC patients were analyzed prior to treatment. FDG-PET/CT and DCE-CT were co-registered. The tumor was delineated and metabolic activity was segmented on the FDG-PET/CT in two regions: low (<50% maximum SUV) and high (≥50% maximum SUV) metabolic uptake. Blood flow, blood volume and permeability were calculated using a maximum slope, deconvolution algorithm and a Patlak model. Correlations were assessed between perfusion parameters for the regions of interest. DCE-CT provided additional information on vasculature and tumor heterogeneity that was not correlated to metabolic tumor activity. The...
IEEE Transactions on Advanced Packaging, 2007
This paper presents a polymer-based wafer-level integration technology suitable for integrating R... more This paper presents a polymer-based wafer-level integration technology suitable for integrating RF and mixed-signal circuits and systems. In this technology, disparate dies can be integrated together using a batch fabrication process. Very high density die-to-die interconnects with widths currently as small as 25 m are implemented. To demonstrate the capabilities of this technology, a 10-GHz receiver front-end implemented in 0.18-m CMOS technology is integrated with a high-resistivity Si substrate and embedded passives. By adjusting the input matching of the receiver using the embedded passives fabricated on the high-resistivity Si substrate, the input matching and conversion gain of the front-end receiver are improved.
IEEE Congress on Evolutionary Computation, 2010
Standard genetic algorithms are not very suited to problems with multivariate interactions among ... more Standard genetic algorithms are not very suited to problems with multivariate interactions among variables. This problem has been identified from the beginning of these algorithms and has been termed as the linkage learning problem. Numerous attempts have been carried out to solve this problem with various degree of success. In this paper, we employ an effective algorithm to cluster a dependency structure matrix (DSM) which can correctly identify the linkage groups. Once all the linkage groups are identified, a simple genetic algorithm using BB-wise crossover can easily solve hard optimization problems. Experimental results with a number of deceptive functions with various sizes presented to show the efficiency enhancement obtained by the proposed method. The results are also compared with Bayesian Optimization Algorithm, a well-known evolutionary optimizer, to demonstrate this improvement.
Fatigue & Fracture of Engineering Materials & Structures, 2009
The effect of martensite morphology on the impact and tensile properties of dual phase steels wit... more The effect of martensite morphology on the impact and tensile properties of dual phase steels with a 0.25 volume fraction of martensite (V m) under different heat treatments was investigated. These treatments are direct quenching (DQ) and step quenching (SQ) that result in different microstructures and mechanical properties. To process dual phase steels, a low carbon manganese steel was used. At first the banding present in the initial steel was eliminated, then the two different heat treatments were applied. To reach a 0.25 volume fraction of martensite a variation of intercritical annealing temperatures was adopted for both treatments that allowed the evolution of different volume fraction of martensite. Phase analysis showed that an intercritical temperature of 725 • C (between A 3 , A 1) gives the desired 0.25 V m of martensite. A comparison of impact, tensile and ductile-brittle transition temperature (DBTT) indicates that the microstructure of the direct treatment has a better toughness. The DBTT for the DQ and SQ treatment is −49 and −6 • C, respectively. Keywords dual phase steels; fixed volume fraction of martensite; impact properties; toughness.
(English) The objective of this experiment was to study and changing the payment system of sugar ... more (English) The objective of this experiment was to study and changing the payment system of sugar beet in the autumn sowing from a linear to regressive equation for sugar content of 10 to 24 percentages based on the technical quality and recoverable sugar in ...