A new circuit analysis method, named SPICE-accurate iterative linear-centric analysis (SILCA), is proposed for the efficient and accurate time-domain simulation of deep submicron very large scale integrated (VLSI) circuits with strong parasitic couplings. SILCA consists of two key linear-centric techniques applied to time-domain nonlinear circuit simulation. For numerical integration, explicit-formula substitution and iterative-formula transformation are presented to convert implicit variable time-step integration to fixed leading coefficient (FLC) variable time-step integration. This paper characterizes both convergence and stability properties of the resulting FLC integration formulae. For nonlinear iteration, a successive variable chord (SVC) method is used as an alternative to the Newton-Raphson method. Further, the low-rank update technique is implemented for fast LU factorization. With these techniques, the number and cost of required LU factorizations are reduced dramatically. Experimental results on nonlinear circuits coupled with substrate and power/ground networks have demonstrated that SILCA achieves more than an order of magnitude speedup over SPICE3 in terms of both the cost of LU factorization and the overall CPU time. SILCA is suitable for efficient SPICE-like time-domain simulation of parasitic-coupled VLSI circuits, where the number of linear parasitic elements dominates the number of nonlinear devices.

Speedup

Spice

10.1109/tcad.2005.855943

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Citations (17)

Motion-Compensated Acoustic Localization for Underwater Vehicles

IEEE Journal of Oceanic Engineering (2016)

Zhao Li Stan E. Dosso Dajun Sun

This paper develops and applies a Bayesian inference algorithm for long-baseline (LBL) acoustic localization of a maneuvering undersea vehicle which compensates for vehicle motion during the interrogation-reception time interval between the vehicle and transponders of the LBL system using only acoustic timing measurements. The method is based on including travel-time corrections as additional unknown parameters in the inference, constrained with prior estimates determined by interpolating the vehicle location at interrogation instants from the results of an initial localization based on a static-vehicle model. Monte Carlo simulation studies show that the motion-compensated localization method performs much better than the static-model localization method or a localization based on applying fixed travel-time corrections. Results from field trials carried out in a large lake are also presented, with averaged acoustic localization errors for a surface vehicle (judged relative to high-precision GPS locations) reduced from 19 ± 14 cm for the static-model localization to 3.4 ± 1.4 cm for the motion-compensated localization, which is comparable to the GPS uncertainties.

10.1109/joe.2015.2503518

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Citations (59)

Numerical investigations on the effects of envelope thermal loads on energy utilization potential and thermal non-uniformity in sleeping environments

Building and Environment (2017)

Ning Mao Mengjie Song Dongmei Pan Zhao Li Shiming Deng

Envelope (radar)

Building envelope

Bedroom

10.1016/j.buildenv.2017.07.044

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Citations (12)

Deformation Behavior of AEREX350 Alloy during Bolt Hot Heading Processing

Materials science forum (2022)

Shu Fu Tao Wang Zhao Li Wan Jun Jin

AEREX350 is a nickel-cobalt fastener superalloy developed for high temperature applications such as aerospace and petrochemical industries. The AEREX350 alloy has superior creep resistance and rupture properties similar to the other MP family alloys. As for AEREX350 alloy, scholars have carried out many studies on its cold working process, heat treatment process, stress relaxation performance and identification of precipitated phase [3-9], while very limited research on the hot deformation behavior of this interesting alloy during hot heading process. This paper is concentrated on the deformation behavior of the alloy during hot heading process.

Fastener

10.4028/p-hffhv1

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Theoretical Study of the Anti-CO Poisoning of Pt(111) Catalyst in the Presence of Nafion

Russian Journal of Physical Chemistry A (2024)

Yongchun Tong Jia-Hao Fu Zhao Li Qing-Yun Wang

Nafion

CO poisoning

10.1134/s0036024424700134

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Allelopathy of aqueous extracts of Kochia scoparia on flaxseed.

Acta Pratacultural Science (2010)

Zhao Li Niu Jun-yi Changjiang Li MA Peng-li Dang ZhanHai

Allelopathy of aqueous extracts of Kochia scoparia and its different parts on flax(Linum usitatissimum) were tested by the methods of bioassay.The results showed: 1) Different concentration of K.scoparia and its stem and leaf aqueous extracts have different degree's inhibition on flaxseed germination and seedling growth,and the inhibition rate increased with the increasing concentration of extract,0.100 g/mL whole plant and its stem and leaf aqueous extracts of K.scoparia have 100% inhibition rate to the germination energy,germination rate,germination index,vigor index and root length,shoot height,root fresh weight and shoot fresh weight.2) The aqueous extracts of K.scoparia inhibit flaxseed germination was mainly because they inhibit vigor index,and they inhibit the growth of flax seedlings was mainly because they inhibit root growth.3) K.scoparia aqueous extracts showed allelopathy effect to the germination and seedling growth of flaxseed,which indicated that K.scoparia release allelochemicals in various ways(such as rainoff eluviation,root excretion,etc.).But according to the inhibition synthesis effect,at the same concentration of aqueous extracts,the stem and leaf has the strongest allelopathy on flaxseed,and the root has the least allelopathy.

Allelopathy

Scoparia

Linum

Dry weight

Source

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Nonlinear parameter estimation for calibration and installation of an ultra-short baseline system

Harbin Gongcheng Daxue Xuebao/Journal of Harbin Engineering University (2010)

Zhao Li

The performance of non-linear parameter estimation methods for the installation and calibration of ultra-short baseline(USBL) arrays was compared.An improved algorithm was proposed,where the parameters were estimated using a loop algorithm and then a non-cycle(direct) method was used to revise them.The equation of observation needed to solve the calibration problems for installation was found.Newton's method,the trust region method,steepest descent method,Gauss-Newton method and the improved Gauss-Newton method were implemented to solve the equation and their performance was analyzed and compared with non-cyclic algorithm for non-linear model parameter estimation,and then an improved algorithm that combines with a non-cyclic algorithm and a loop algorithm was given.The algorithm's procedures were discussed,and then sea trial data was used to verify its efficiency.

Baseline (sea)

Source

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Citations (1)