Research on process-induced effect in 14-nm FinFET gate formation and digital unit optimization design

The advanced fin-shaped field-effect transistor(FinFET)technology offers higher integration density and stronger channel control capabilities,however,more complex process effects are also introduced which have significant influence on device performance.To address these issues,we complete a design-technology co-optimization(DTCO)focused on FinFET,including both process-induced effect during gate formation and corresponding digital unit optimization design.The 14 nm Fin-FET complementary metal oxide semiconductor(CMOS)technology is used to illustrate the sensitivity of transistor perfor-mance to process-induced effect,specifically the poly pitch effect(PPE)and cut poly effect(CPE).Predictive technology com-puter aided design(TCAD)simulations have been carried out to evaluate the transistor performance in advance.Based on the results,optimizations in digital unit design is proposed.Fall delay of the digital unit inverter is decreased by 0.7%,and the rise delay is decreased by 2.1%.For multiple selector(MUX2NV),the delay decreases by 4.64%for rise and 3.56%for drop,respec-tively.

Dwell Scheduling Algorithm for Digital Array Radar

Aiming at the problem of resource allocation for digital array radar（ DAR）,a dwell scheduling algorithm is proposed in this paper. Firstly,the integrated priority of different radar tasks is designed,which ensures that the imaging tasks are scheduled without affecting the search and tracking tasks; Then,the optimal scheduling model of radar resource is established according to the constraints of pulse interleaving; Finally,a heuristic algorithm is used to solve the problem and a sparse-aperture cognitive ISAR imaging method is used to achieve partial precision tracking target imaging. Simulation results demonstrate that the proposed algorithm can both improve the performance of the radar system,and generate satisfactory imaging results.

Liquid Reinforcement

The following paper describes a strategy for an adaptive reinforcement of additively manufactured objects.The described method aims in particular at the strengthening of geometrically complex objects which can be produced with the so-called powder bed method.The strengthening is carried out by a hardening liquid which is injected into cavities of an additively manufactured shaped object.In order to meet the requirements,the design of the cavities is carried out in a digital optimization process,which takes place before the printing procedure.Cavities filled with injection material act as reinforcement,which can be interlocked with the surrounding material in a force-fit and adhesive manner.The described approach uses the advantages of the powder bed process,which allows the production of shaped parts without significant geometrical restrictions to form tubular cavities.The comparatively high porosity,which is often cited as a weakness of the powder bed process,is also used to form a bond zone between the printed object and the reinforcement strand.The present study deals with basic principles necessary for the automatic control of the penetration depth and the injection process.The investigations are based on a selection of suitable materials.

On optimal binary signed digit representations of integers

Binary signed digit representation （BSD-R） of an integer is widely used in computer arithmetic, cryptography and digital signal processing. This paper studies what the exact number of optimal BSD-R of an integer is and how to generate them entirely. We also show which kinds of integers have the maximum number of optimal BSD-Rs.

Fast Fourier Transform:A Niche,but Critical Strategy in Optimizing Impression Evidence

The evolution from film to digital as the recording medium for forensic imaging has extended the reach of forensic photographers,both in original capture and postphotography processing.Images of fingermarks and footwear impressions are routinely obstructed by substrates displaying intrusive color and pattern.Such backgrounds are frequently sufficiently intrusive as to prevent the analysis and comparison of the images to known exemplars.Digital techniques such as Fast Fourier Transform(FFT)in postphotography processing can optimize the signal-to-noise ratio to a greater degree than was ever possible when film was the recording standard.Occasionally,unwanted backgrounds can be removed or diminished in Photoshop with techniques such as background subtraction and channel blending.These strategies,however,are dependent on either physical removal of the evidence impression to obtain a second image of the obstructive pattern or on differences in color between the impression and the offending substrate.FFT is unique in its ability to optimize the image signal to noise ratio by suppressing the obstructive background,in that it is not reliant on color,and is not applied in the spatial domain.