Optimierung an der Deponie Tüfentobel

Verlängerung RopeCon Tüfentobel

In der Deponie Tüfentobel transportiert ein RopeCon seit 2005 Inertmaterialien entlang eines langgestreckten Tals, das hinterfüllt werden soll. Das Band entlädt die Inertmaterialien direkt dort, wo sie eingebaut werden sollen, auf einen Schüttkegel. Im März 2013 wurde eine neue Stütze entlang der Strecke eingebaut und der Abwurfpunkt versetzt. Der folgende Artikel berichtet zunächst über diese Verlängerung und beschreibt außerdem die allgemeinen Auswirkungen des Einsatzes dieses Transportsystems auf den Betrieb der Deponie.

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A study on kriging small blocks

Professor Dr Margaret Armstrong ranks high amongst geostatistical scholars. In contrast, Mr Normand Champigny has earned a Certificate of sorts and turned into a gifted CIM Member. CIM Bulletin published this small block study in March 1989. What the authors had discovered was that “kriged estimates for very small blocks are over-smoothed”, and that “mine planners often insist on kriging very small blocks!” Good grief! The problem is not so much that mine planners have not been taught how to test for spatial dependence between measured values in ordered sets. The real problem is that Professor Matheron did not know how to test for spatial dependence between measured values, and how to count degrees of freedom! So it was not at all surprising when Matheron flunked his PhD thesis in 1970! Yet, in 1974 Matheron was ready to teach “Brownian motion along straight lines!” He has been hailed as the Founder of Spatial Statistics! For crying out loud!

Professor Dr Margaret Armstrong had figured out what Matheron had failed to grasp! After completing a Master’s degree in mathematical statistics at the University of Queensland, she took off to the City of Lights. She qualified for a PhD in geostatistics after the distance-weighted average had shed its variance. Stripping variances off distance-weighted averages AKA kriged estimates has stood the test of time. Nobody ever thought about counting degrees of freedom on Matheron’s watch.

Professor Dr Roussos Dimitrakopoulos was also a graduate at the University of Queensland in Australia. Dr RD dismissed degrees of freedom but got into stringing Markov chains at McGill University in Canada. He did so because he does not know how to derive unbiased confidence limits for metal contents and grades of mineral inventories.

Professor Dr Michel David must have been pleased that mine planners were to blame for over-smoothed estimates. But he was not at all pleased that my talk about Sampling in Exploration-Theory and Practice was a first at PDAC’s meeting on March 23, 1991. He took a seat opposite my lectern and didn’t  pose a single question! Neither did other geostatistocrats!

In 1992 I visited BHP’s mining operations in Australia. The problem was BHP’s assay laboratory got significantly lower grades than its mine planners had been predicting. For crying out loud! Surely, investors should get unbiased confidence limits for metal contents and grades of mineral inventories!

Chairman Peter Munk retired?

Who knows? Munk has always been driven to mine gold! So his offspring may be driven too! Do Barrick’s investors worry? Who cares? Here are some facts and figures! Once upon a time I had asked Barrick Gold Corporation to invest C$100,000 in applied statistics. What I had been given was a massive set of gold grades in drill core samples. I converted gold grades into masses of in-situ gold. Next, I derived 95% confidence limits for gold grades and contents. I have not yet described in detail how I unscrambled the Bre-X salting fraud! Dr Roussos Dimitrakopoulos is sticking to stringing Markov chains rather than applying a simple test for spatial  dependence between measured values in ordered sets and counting degrees of freedom. Who could possibly be behind stringing Markov chains? Stay tuned to find out why truth is stranger than fiction.

Barrick Gold has awarded C$1million to Dr Roussos Dimitrakopoulos. Dr RD prefers to ignore degrees of freedom and to dismiss real variances. He prefers to string Markov chains between measured values in ordered sets. He cannot possibly derive unbiased confidence limits for gold grades and contents. But Dr RD keeps happily stringing along! McGill’s students have not yet been taught how  to count degrees of freedom and why! Of course, it makes no sense whatsoever to string functionally dependent values between measured values in ordered sets. What makes sense is testing for spatial dependence between gold grades within boreholes! Stuffing strings of Markov chains between measured values makes no sense whatsoever!

My memo on Statistical Evaluation of Test Results was sent to Mr Alan R Hill, Executive President, on December 17, 1996. I was pleased to have so many test results for gold. What lingers in my mind is a visit to Barrick’s office in Toronto. I had been invited to come by on December 17, 1996 at 10:00AM. We were talking about tasks I thought ought to be done. That’s when the meeting room door opened ajar. It was Chairman Munk! All he did was ask President Carrington to come and see him after we were finished.

I had been talking about a test program at Bre-X’s site in the Kalimantan jungle. I was given 2,200 test results in crushed core samples each with a length of 2.9 m. Lakefield Research had measured gold by atomic absorption in what was called 0.1 m library core. I wondered what could have been added to 2.9 m of crushed core samples! Filings of a gold/silver alloy?

Several books have been written about Bre-X and its turbulent existence. I have a copy of each. Gold Today, Gone Tomorrow squeezed more facts between its covers than others did. Who  keeps track of those who strip variances off distance-weighted averages AKA kriged estimates?  Wikipedia published goofy science under Geostatistics. All it took was to strip the variance off the distance-weighted average and call what’s left a kriged estimate. Geostatistocrats like to play kriging games with infinite sets of kriged estimates and zero kriging variances. Good grief!

Fotogalerie Schüttgut 2014 in Dortmund

Rund 5.000 Fachbesucher kamen am 21. – 22. Mai 2014 auf die Fachmessen Schüttgut & Recycling-Technik in die Westfalenhallen nach Dortmund, um dort mit 393 ausstellenden Firmen Geschäfte zu machen, Kontakte zu knüpfen und konkrete Projekte zu besprechen. Schauen Sie sich in Ruhe die Impressionen unseres Fotografen an.

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The Inspector’s Field Sampling Manual

That’s printed above the title page! Smaller print lower on the same page refers to A Sampling Manual and Reference Guide for Environment Canada Inspectors, First Edition. I perused its 231 pages and thought it ought to be revised. The more so since geostatistics is an invalid variant of applied statistics. Here’s why! A French scholar in the 1970s stripped the variance off the distance-weighted average, and called what was left a kriged estimate. Infinite sets of kriged estimates, zero kriging variances and zero degrees of freedom underpin Matheron’s science of geostatistics. Incredibly, geostatistics is an integral part of 2.0 Sampling in the Field and of 2.1 Site Selection and Documentation. The question is then why a stratified systematic sampling is an integral part of its very First Edition!

In fact, 1.1.1 Message from the Deputy Minister, pointed out the present edition will be updated as soon as more information is available and more lessons have been learned. Good thinking but slow learning! What sort of lessons do the inspectors of Environment Canada have to be familiar with before this field sampling manual will be revised?

Mel Cappe, Deputy Minister, may not have been taught why geostatistics is an invalid variant of applied statistics. Here’s why in a nutshell! Professor George Matheron and a few of his students traveled to the USA in the 1970s. Matheron invoked Brownian motion along a straight line. Marechal and Serra derived a set of sixteen (16) values from a set of nine (9). Geostatistics is an invalid variant of applied statistics because Matheron and his disciples did not know that degrees of freedom ought to be counted and why!

Did Mel Cappe and his team know how to count degrees of freedom? Surely, his inspectors ought to know how to count degrees of freedom and why! The fact that Matheron and his students did not count degrees of freedom should have been addressed. Yet, neither Section 2.0 Sampling in the Field and nor Section 2.1 Site Selection and Documentation, explain how, when and why degrees of freedom ought to be counted.

Mel Cappe is Professor in the School of Public Policy and Governance. He teaches in the Masters Program and is Coordinator of the Undergraduate program in Public Policicy. He is an Officer of the Order of Canada. Mel Cappe, unlike Professor Georges Matheron, should be able to count degrees of freedom flawlessly! It’s printed above the title page! Smaller print on the same page refers to A Sampling Manual and Reference Guide for Environment Canada Inspectors, First Edition. I perused its 231 pages and thought it ought to be revised. The more so since geostatistics is an invalid variant of applied statistics. Here’s why! A French scholar in the 1970s stripped the variance off the distance-weighted average, and called what was left a kriged estimate. Infinite sets of kriged estimates and zero degrees of freedom underpin Matheron’s science of geostatistics. Incredibly, geostatistics is an integral part of 2.0 Sampling in the Field and of 2.1 Site Selection and Documentation. The question is why stratified systematic sampling is an integral part of this First Edition!

In fact, 1.1.1 Message from the Deputy Minister, has pointed out that the present edition will be updated as soon as more information is available and more lessons have been learned. Good thinking but slow learning! What lessons do Environment Canada Inspectors have to learn before this field sampling manual will be revised?

Mel Cappe, Deputy Minister, may not have been taught why geostatistics is an invalid variant of applied statistics. Here’s why in a nutshell! Professor George Matheron and a few of his students traveled to the USA in the 1970s. Matheron invoked Brownian motion along a straight line. Marechal and Serra derived a set of sixteen (16) values from a set of nine (9). Geostatistics is an invalid variant of applied statistics because Matheron and his disciples did not know that degrees of freedom ought to be counted and why!

Did Mel Cappe and his team know how to count degrees of freedom? Surely, his inspectors ought to know how to count degrees of freedom and why! The fact that Matheron and his students did not count degrees of freedom should have been addressed. Yet, neither Section 2.0 Sampling in the Field and nor Section 2.1 Site Selection and Documentation, explain how, when and why degrees of freedom ought to be counted.

Mel Cappe is Professor in the School of Public Policy and Governance. He teaches in the Masters Program and is Coordinator of the Undergraduate program in Public Policicy. He is an Officer of the Order of Canada. Mel Cappe, unlike Professor Georges Matheron, should be able to count degrees of freedom flawlessly!

Neuerung im Endress+Hauser Online Shop

Seit Januar 2014 stellt Endress+Hauser die neue Version 7.1 des Online Shops zur Verfügung. Über den Endress+Hauser Online Shop können alle Standardprodukte, Dienstleistungen, Ersatzteile sowie Zubehör bestellt werden. Als neuer Menüpunkte wurde im Online Shop 7.1 die Produktauswahlhilfe „Applicator“ mit aufgenommen.

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Verluste vermeiden

Durch abrasiven und erosiven Verschleiß an Maschinen und Bauteilkomponenten des Anlagenbaus, z.B. bei Anlagen im Bergbau und zur Erzaufbreitung, in der Zement- und Ziegelindustrie, bei Straßenbau- und Erdbewegungsmaschinen sowie bei Großraumbaggern, werden heute erhebliche volkswirtschaftliche Verluste verursacht. Eine wirtschaftliche und effektive Schutzmaßnahme zur Erhaltung von hochabrasiv, adhäsiv und/oder erosiv beanspruchten Funktionsoberflächen stellt hierbei das Auftragschweißen dar.

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Gelungenes Konzept

Anforderungen an Schlüsselkomponenten im Anlagenbau für Schüttgüter im Bereich der Nahrungsmittelindustrie unterliegen einem ständigen Wandel. Zurzeit ist ein klarer Schwerpunkt auf eine möglichst hygienegerechte Ausführung zu verzeichnen. 1989 wurde die „European Hygienic Engineering & Design-Group“ (abgekürzt EHEDG) als Expertengemeinschaft von Maschinen- und Komponentenherstellern sowie Fachleuten aus der Nahrungsmittelindustrie und Forschung gegründet. Ihre Hauptaufgaben:

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