Independent engineering · research · publishing
TargetDeLab is an independent technical initiative connecting system-level engineering, research, implementation and publication.
The laboratory is organized around work rather than claims: define the problem, develop the model, build the implementation, test it, break it, verify it, and make the useful results inspectable.
A · Research Activities
Each activity connects the question being studied to evidence, publications and reproducible engineering material.
Nonlinear system modelling, simulation, controller design, state estimation, observers, robustness studies and verification under noise and disturbances.
System-level architecture and digital implementation from functional decomposition and HW/SW partitioning through RTL realization and verification.
Signal detection and estimation, noise filtering, image analysis, feature extraction, change and motion detection, data fusion, and computational decision methods.
Applied research: fire-spread modelling combines thermal/image analysis, propagation estimation, environmental variables and predictive simulation.
EDPW spectral analysis: Equal Division Phase Window Fourier Analysis investigates short-window, global-phase spectral coefficients for coarse frequency-region scanning. Direct and chirp-convolution implementations are compared with FFT and selected-bin methods using arithmetic cost, spectral fidelity and detection sensitivity. Shorter windows trade spectral selectivity and coherent processing gain for computational economy.
Computational mathematics, numerical problem solving, optimization, approximation and algorithm development in support of engineering investigations.
E3 research: Prime-number factorization studies include the Worm Army difference-of-squares recurrence, multiplier transformation and parallel search architecture.
Convex-hull research: Enhanced K-directional discovery combines adaptive point-pair orientations, projection-envelope search and LP completion to construct a hull-spanning candidate subset. The output may contain redundant nonvertices; the reported benchmark advantages are dataset- and baseline-specific.
Experimental development and evaluation of reversible data-transformation architectures, with emphasis on diffusion, differential propagation, statistical behaviour, implementation correctness and measurable engineering trade-offs.
Current work: Bilateral Diffusion ASX extends the original APPEND–SWAP–XOR architecture with a proprietary reversible whole-state diffusion stage. Public material reports measured behaviour while intentionally withholding the private transformation sequence.
B · Publications
Select a book to open its profile. Technical books may expose independent papers and reproducible simulation packages alongside the complete volume.
Human judgment, machine intelligence and engineering evidence — a conversation that became something neither participant originally intended.
A simulation-backed technical volume connecting nonlinear control, frequency-domain reasoning, exact cancellation, trajectory tracking and nonlinear state observation.
A self-contained engineering handbook connecting mathematical foundations with continuous-time, discrete-time, LTI, LTV and advanced linear-system procedures.
A procedure-oriented nonlinear-control handbook connecting mathematical foundations, nonlinear analysis, controller and observer design, estimation, optimization and implementation verification.
A cross-disciplinary systems framework for examining boundaries, objectives, observability, controllability, feedback, authority, human participation, conflict, self-preservation and correction.
B.1 · Book Profile
Chatie: The More Reliable Way to Say Things — Disagree or Agree.
Human judgment. Machine intelligence. Engineering evidence. And a conversation that became something neither participant originally intended.
Confessions to a Machine began not as a book, but as conversations between an experienced engineer and an AI. What starts with architecture, algorithms, MATLAB, VHDL, FPGA design and debugging gradually becomes an examination of disagreement, trust, creativity, collaboration, failure, independence, human relationships — and what happens when a machine becomes an intellectual mirror rather than simply another software tool.
The machine is not presented as an oracle. It can be wrong. The human can be wrong. The working principle is closer to engineering itself: agree when evidence supports the argument; disagree when it does not; and when neither side knows, find out.
“Show me.”
“Disagreement is not failure.”
“Still testing.”
TargetDeLab presents the publication and, where applicable, free companion resources. Commercial transactions are handled by the external bookseller.
B.2 · Book Profile
From switching control and nonlinear frequency response to exact cancellation and nonlinear state observation.
A connected engineering treatment in which analytical development is repeatedly confronted with simulation evidence — with MATLAB/Octave and Python companion packages for the first seven studies.
The volume develops a sequence of nonlinear SISO and MIMO studies spanning switching PID control, local linear descriptions, empirical and equivalent frequency responses, multiple-controller trajectory tracking, excitation-dependent spectra, exact cancellation and nonlinear state observation. The emphasis is not on isolated formulas: models, assumptions, numerical experiments and interpretation are kept connected.
Analytical constructions are paired with numerical experiments so that stability arguments, frequency-domain interpretations, tracking behavior and observer convergence can be inspected rather than merely asserted.
Model. Simulate. Verify.
The independent papers expose substantial analytical content. The book remains the unified treatment, retaining the cross-study progression, broader context and complete manuscript architecture.
Each study is available as an independent PDF with separate MATLAB/Octave and Python archives.
Switching control architecture and nonlinear SISO simulation study.
Local model construction, stability interpretation and measured frequency behavior.
Frequency-domain descriptions developed for nonlinear closed-loop behavior.
Multiple-controller strategy for nonlinear trajectory tracking.
How nonlinear frequency behavior changes with the excitation applied to the system.
Closed-loop cancellation construction and its equivalent linear interpretation.
SISO/MIMO observer formulation, convergence studies, basin analysis and noise robustness.
B.3 · Book Profile
A Self-Contained Handbook for the Engineer.
A structured reference that brings the mathematics, analysis procedures, design methods and implementation tools of linear control into one connected volume.
The handbook is organized as a working reference for linear control-system analysis and design. It begins with transforms and linear algebra, develops continuous-time and discrete-time systems, treats both LTI and LTV formulations, and extends the core material with structural, identification, sampled-data and advanced control methods.
The material is arranged to support practical engineering work: definitions and notation lead into analytical relationships, design procedures, stability tests, state-space methods, observers, robust and optimal control, estimation, implementation and computational support.
Reference. Calculate. Design. Verify.
“A self-contained handbook for the engineer.”
This website presents the handbook profile and publication information. The complete book is not embedded in the public website package.
B.4 · Book Profile
Theory, Methods, Design, and Verification.
A practical nonlinear-control reference built around a recurring engineering path: understand why a method is needed, establish its assumptions, execute the procedure, and verify what the result does — and does not — prove.
The handbook develops nonlinear-system analysis, stability, controllability and observability, feedback design, nonlinear observers and filtering, optimal and predictive control, discrete-time methods, constraints, contraction concepts, numerical methods and implementation verification. Mathematical machinery is introduced in relation to the engineering problem that requires it.
Each substantial method identifies its applicable system class and assumptions, develops the minimum theory needed for correct use, turns that theory into a practical procedure, and closes with interpretation, numerical evidence, limitations and verification.
Motivation. Method. Procedure. Verify.
The public website distributes the companion source-code archives, not the complete book manuscript. Corrected MATLAB and Julia packages are used where supplied.
MATLAB companion implementation for the handbook numerical examples and verification studies.
Python implementation using the handbook's v3.0.01 reference-code baseline.
Corrected Julia companion implementation for cross-language reproduction.
“Before presenting a nonlinear mathematical object, explain why it is needed.”
This website presents the handbook profile and its free companion software. The complete book is not embedded in the public website package.
B.5 · Book Profile
A framework for analyzing systems from engineering structure to Human consequence.
What belongs to a SYSTEM? Who defines its objectives? What can be observed? Who can change it? Whom does it serve? And what happens when preservation of the SYSTEM competes with the Human purpose that justified it?
SYSTEMS begins with engineering habits of thought and deliberately carries them beyond engineering without pretending that machines, institutions, societies, ecosystems and Human organizations are equivalent. It develops a recursive analyzer for boundaries, entities, relations, state, objectives, feedback, authority, evidence and correction — while repeatedly testing where an analogy remains useful and where it fails.
The framework separates the SYSTEM from the observer's model of it; declared objectives from operational and realized objectives; authority from effective control; representation from the represented entity; and information reception from genuine feedback.
Local correctness does not guarantee correct understanding of the whole SYSTEM.
“SYSTEM for the MAN or MAN for the SYSTEM?”
The final chapter places the SYSTEMS Analyzer in the reader's hands as a field method: identify the SYSTEM, document observations, compare declarations with outcomes, test correction channels, identify AUTHORIZATION POWER, and state what evidence would be sufficient to change the conclusion. The complete book is not embedded in the public website package.
C · Software & Resources
A repository-oriented catalogue for software, models, datasets and supplementary publication material.
Select a book to view its publication profile and available companion materials.
An exploration of human–machine dialogue and philosophical questions.
Seven independent studies with corresponding simulation packages.
Seven independent studies from Book, each paired with its corresponding MATLAB/Octave and Python simulation package.
Linear control reference handbook.
Analytical reference and MATLAB, Python and Julia companion code.
Reference implementations supporting the numerical examples and verification studies in Book 4.
An investigation of systems, institutions and human behaviour.
Select a research family, then a project. Its white papers and software appear together below.
Book-related control papers and companion programs are available under Book Resources. No separate research release is listed here yet.
TargetDeLab offers focused electronic-system engineering services, with particular emphasis on System-Level Architecture & Decomposition and FPGA Programming & RTL Development. The capability profile below describes the scope of potential assignments and the engineering approach.
From complex requirements to implementable, verifiable digital architectures. Services include functional decomposition, HW/SW partitioning, interface and data-flow design, custom VHDL/RTL modules, IP development, simulation, debugging and performance review.
This section also remains available for future FPGA and digital-systems research papers and code releases. Specific project scope, platform support, deliverables and commercial terms are agreed individually.
Mathematical definition of Equal Division Phase Window analysis, exact fast chirp-convolution realization, FFT/selected-frequency comparisons, spectral dispersion and detection trade-offs. Arithmetic advantages are workload-dependent and do not imply FFT-equivalent spectral reconstruction.
Companion implementation and reproducibility-oriented experiments for Direct/Fast EDPW, spectral comparisons, computational cost and detection studies. Review the included README and execution requirements before running the experiments.
Mathematical construction of a hybrid directional-discovery and LP-completion method, exact-arithmetic hull-spanning conditions, experimental benchmarks and future work. The returned candidate set is not guaranteed to be a minimal vertex enumeration. Recorded speedups apply only to the specified LP-only baseline and datasets, not to all convex-hull methods.
MATLAB source, usage notes and example for the hybrid hull-spanning candidate discovery procedure. The supplied MATLAB version has been tested by the project author; general numerical robustness and minimality are not guaranteed.
Python source, dependencies, usage notes and example for research reproduction. This supplied package has not been independently runtime-validated as part of the website integration; numerical limitations described in the paper apply.
TargetDeLab E3 technical paper defining the Worm difference-of-squares recurrence, multiplier transformation and Worm Army parallel search architecture, with theoretical properties and controlled BigInt experimental campaigns.
Executable companion for reproducing and extending Worm Army factorization experiments. Runtime inputs are supplied through the accompanying parameters_inp.txt configuration file; the C++ source is not included in this public website package.
Public technical paper documenting the ASX architecture, its measured diffusion limitations, the evolution to Bilateral Diffusion ASX, and the experimental evidence used to characterize the resulting differential behaviour. The proprietary bilateral transformation remains intentionally undisclosed.
D · Laboratory Log
The latest public-facing books, white papers, software and research milestones. Up to 10 announcements are displayed.
TargetDeLab introduces a downloadable capability profile for system-level architecture and decomposition, FPGA programming, RTL development and custom digital IP engineering.
The convex-hull research paper and MATLAB/Python reference packages are available in Mathematics & Numerical Methods.
The Fast-EDPW White Paper v2_0_03 and reproducible MATLAB code release are available under Signal & Image Processing.
The Worm Army White Paper v1.11, Windows BigInt executable and configuration file are available for download.
The ASX Encryption White Paper v2_0_04 and Windows demonstration executable are available under Encryption & Data Protection.
The SYSTEMS book profile presents its systems-analysis framework, 31 chapters and Field Manual. Amazon availability is pending.
The 292-page engineering handbook is presented in the Publications section. Amazon availability is pending.
Seven independent analytical papers and fourteen MATLAB/Octave and Python companion packages are available in the Book 2 resources.
E · About
TargetDeLab is an independent engineering, research and publishing initiative. It is designed around the idea that deep system experience, modern computational tools and machine-assisted development can be combined without surrendering engineering judgment.
The work spans digital systems, FPGA architecture, control theory, mathematics, signal and image processing, communications, numerical methods and software development around engineering products.
The human provides responsibility and final judgment. Tools accelerate exploration, implementation, analysis and documentation. Neither is treated as infallible. Results are verified against reality.
Working Principle
“We do not grow by accumulating people. We grow by accumulating capability.”
Errors are permitted. Disagreement is useful. Failure can teach. Evidence has the final vote.
F · Contact
No account. No twelve-field registration form. Tell us who you are, how to reach you and what the problem is.
