CN1272918A - Method for determining orientation of fibre structure in mineral wool mat - Google Patents
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- G06T—IMAGE DATA PROCESSING OR GENERATION, IN GENERAL
- G06T7/00—Image analysis
- G06T7/70—Determining position or orientation of objects or cameras
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- G—PHYSICS
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Abstract
The invention concerns a method for determining the orientation of fibre structure in a mineral wool mat, and in particular in a crimped mineral wool mats, which consists in recording on a video camera at least one image of a mineral wool mat predetermined zone and in evaluating said image luminous density profile using digital image processing. The vertical fibre proportion and the crimping fineness are computed from the luminous density profile and are digitally and/or graphically represented and evaluated.
Description
The present invention relates to cushion of mineral wool, especially crimp the method for the orientation of fibre structure of cushion of mineral wool.
For the present invention specific descriptions are crimped the situation of cushion of mineral wool, but be not confined on this specific product type, any product type based on mineral wool all falls within the scope of the invention.
Crimp cushion of mineral wool, promptly, wherein machine direction is a quasi-random, but not be parallel to the sort of cushion of mineral wool on a plane, and can be used for various application, especially can not cause serious crushing or apply the occasion that pulling force can not cause layering thereon when needing or exert pressure thereon.
Usually, cushion of mineral wool is stacked and makes continuously by deposit fiber on travelling belt that fiber is carried by air-flow.
Before fiber was deposited on the travelling belt, they were coated with resinous principle, used so that fiber is bonding mutually, so form cohesion in the pad that constitutes.The resinous principle that applies in the liquid mode is formed the connection of net key by the thermal treatment of carrying out on pad, this pad is made desired thickness and desired density in advance.
Its characteristic of the product that classic method produced that forms pad can not satisfy all requirements of some specialized application fully.Except with the desired isolation performance of complete general fashion, also must require employed product to have very special mechanical property sometimes.For example, the product that the supporting masonry is built the unit by laying bricks or stones is exactly this situation, and this product must bear high pressure thus, so that this product can be used for entering the isolation on the flat-top roof of air-flow.The product that is used to be isolated from the outside and especially must bears tearing power also is to belong to this situation.
In order to obtain to have the product of these specific characteristics, the essential classic method of making this class pad of improving.
In classic method, by having produced uneven disorder on all directions at the pad of accepting deposit fiber formation on travelling belt or the similar device.
Experience shows, fiber has and is parallel to the strong trend of accepting surface arrangement.Fiber is longer, and this trend is more outstanding.This mat structure helps their isolation performance and also helps their stretching resistances in the vertical.
Thereby for many application, this structure is favourable.But, be appreciated that this structure is not only sometimes, for example, when this product should bear pressure or the tearing power at thickness direction.
It is known being used to " quasi-random " directed method of fiber is provided.To this, European patent application EP-A-0 133 083 proposes: the fiber mat that is received on the receiving device is put the low a pair of conveyer of speed than above-mentioned biography and is compressed continuously in the vertical when it has born behind the pressure to be sent to from a pair of a pair of conveyer with the certain speed driving at thickness direction.When on a plurality of sequential step, compressing, can obtain very high compressibility, especially all the more so for not forming the very difficult pad of once realizing compressing of wrinkle.Similarly, for identical final compressibility, the performance of product can be improved when compressing with a plurality of steps.
Equally, extensively approval is, the thermomechanical property of this series products be with fill up in the layout of fiber be closely related.
So far, curling is used to do qualitative evaluation, in other words, according to visual estimation, still, crimps rate or can not represent the general performance of the product that obtains in view of the compressibility of the velocity variations between the forwarder.After all, the estimation of vision can not reappear ground, systematically determine may get in touch between the geometrical performance of product and its thermomechanical property.
In addition, such quality inspection definitely can not be used for production line, for example be used for the examination and test of products.
But, prove usefully, the layout of fiber in the pad be can check and performance, especially their heat and the mechanical property of manufacturing product checked thus.At first this can guarantee the stabilised quality of final products to departing from of standard by check, and manufacturing " history " that can be by storing each product is to be used for from now on check by rule of thumb.In addition, can consider, production be controlled according to these data.
In order not injure the geometry of test product, therefore should carry out contactless measurement, its measurement result should be known and also can be stored in real time, so that they are handled.
The present invention is intended to obtain the dominant direction of fiber that occurs in varing proportions in the cushion of mineral wool.
For this reason, can at random set a vertical reference benchmark, so that determine the vertical ratio of fiber, this is in fact corresponding to based on the vertical property of the fabric integer of macroscopic scale.According to macroscopic scale, we will determine the isotropy feature of fibre placement, and below we will be called " degree of crimping " (finesse du crepage).The inventor is verified, does not need to observe each root fiber, is that foot is representative and observe bigger or less " piece ".
Therefore, the objective of the invention is, found a kind of definite orientation of fibre structure in mineral wool mat, especially crimp the method for orientation of fibre structure in mineral wool mat, it can determine vertical fibers ratio and degree of crimping.
According to the present invention, this result is obtained by following method:
Illuminate definite zone of cushion of mineral wool with certain oblique incidence angle;
Be basically perpendicular at least one image that writes down described zone on the axle of this area planar on institute's placed cameras;
It is directly in gamma camera or be installed on the digitizing level of back and carry out that each point of image is distributed the digital signal corresponding to its light intensity, this digitized processing,
By an image processing system, determine vertical fibers ratio and degree of crimping according to the digital signal of light intensity.
Therefore the invention provides a kind of method, can and need not expensive optical device with plain mode by this method and just can determine fibre placement in the cushion of mineral wool quantitatively.The required equipment that is used to detect only comprises lighting device and a gamma camera near cushion of mineral wool, and this equipment directly is placed on the cushion of mineral wool production line will not have hell and high water.
Best, before recording picture, from described zone, remove dust, this dedusting can realize in this wise, but veneer incident injection air or for example with high pressure dust-absorbing.
Advantageously, gamma camera is connected to that image obtains and the input end of disposable plates, and its allows image to be digitized as 512 * 512 pixels on gray shade scale 256.This plate also comprises two parameters, promptly gains and setovers, and they are suitable for carefully being regulated so that the correct quantification of vision signal.Preferably use CCD (charge-coupled image sensor) gamma camera, wherein the ccd sensor that is equipped with of gamma camera comprise 768 * 512 its be of a size of 10 * 10 μ m
2Square light activated element.
According to a preferred embodiment of the present invention, determine vertical fibers ratio and degree of crimping by means of 2 dimension (2D) MORLET wavelet transfer algorithms by digital signal by wavelet transfer algorithm, the outermost of bidimensional function.The inventor confirms, is satisfying many functions of acceptable condition from the wavelet meaning, and the MORLET wavelet can advantageously be suitable for, and this is because the structure of the approaching image to be analyzed of its direction selective power and its oscillatory regime.
In an embodiment of the invention, especially effectively, the orientation of fibre structure of cushion of mineral wool is determined by following sequential step:
On a CCD gamma camera, write down at least from four images in the described zone of diverse location picked-up,
For each of these recording pictures apply image processing and
In the end calculating the value that will obtain before vertical fibers ratio and the degree of crimping averages.
The inventor confirms, can be regenerated by a plurality of images that write down on the identical product diverse location by the value that an image obtains.Similarly, a plurality of images that same Examination region is obtained on diverse location are averaged, will constitute representational mean value.
Equally advantageously, can determine the direction of fibre structure in the cushion of mineral wool like this:
Described analyzed area is divided into two parts at least, and
Determine the direction of fibre structure for each of these parts.
In this way, under the situation of the cushion of mineral wool of big thickness, be favourable, for example, this can determine to fill up the fibre structure on top and the fibre structure of its underpart.Like this, the layout of fiber just quantizes on the thickness of pad dividually, and can do finer check to product quality.
Self-evident, the method according to this invention can be applicable to static product or cushion of mineral wool production line, and for example this pad is placed on the mobile travelling belt.
The present invention also relates to be used to implement device according to the inventive method.
This device can advantageously be made up of a lighting device, a CCD gamma camera and an image processing system, and this lighting device is along a definite zone of oblique incidence angle irradiation cushion of mineral wool; This gamma camera is placed on the axle that is substantially perpendicular to described area planar.
Best, this device also comprises a dust arrester, and advantageously, this dust arrester is that veneer incident is blown the device of air or with the device of high pressure dust-absorbing.
According to a favourable and advantageous variant of the present invention, this image processing system comprises a filtering stage, and this filtering stage is carried out filtering by means of the wave filter that produces bidimensional linear transformation, for example 2D MORLET wavelet transform in image field.
Advantageously, we can use the data that said method obtains correlativity between the machinery of cushion of mineral wool and/or thermal characteristics and vertical fibers ratio that is obtained and the degree of crimping.
In addition advantageously, said method can be used for the robotization of cushion of mineral wool production line, and it allows automatically to regulate crimping the vertical compression speed of part according to the data that obtain.
Other advantage of the present invention and feature will be from following with reference to obtaining the explanation of accompanying drawing to embodiment, and accompanying drawing is:
Fig. 1: the sketch plan of implementing the required device of this method;
Fig. 2: be used for the general block diagram that digital imagery is handled the required basic element of character;
Fig. 3: the general block diagram of calculating the circuit of vertical fibers ratio and degree of crimping according to digital signal;
Fig. 4: the record diagrammatic sketch of degree of the crimping section of measurement;
Fig. 5: the record diagrammatic sketch of the vertical fibers ratio of measurement.
As can be seen from Figure 1, the formation one that the mineral wool band 1-that thickness of making continuously is about 40mm is expressed as the cushion of mineral wool segment is here moved to (unshowned) cutting station according to the thickness of the pad speed with about per minute 20m on the direction of arrow F.
A solution space on production line, the device 2 that blows air by means of veneer incident ground makes the zone of fully extending on the planar side of mineral wool band 1 remove dust.
On this regional level, be sidelong at one of mineral wool band 1 and putting two Halogen lamp LEDs 3 and 4.
Also preferably be mapped to this planar side of mineral wool band 1 with the incident angles of 45 degree with the incident angle between 30 and 60 degree from the light of Halogen lamp LED 3 and 4 emissions.
For the image that makes acquisition can reach good sharpness, it is favourable shining obliquely with big as far as possible incident angle.But on the contrary, incident angle should be not excessive, because the light that increases partly can be reflected by the mineral wool band, this will make the video camera overexposure.
Appreciable as the summary diagrammatic sketch from Fig. 2, this image processing system 7 comprises processor 9, computing machine 10 and mass storage 11.Supervisory keyboard 12 and data presentation device 13 and printer 14 are connected with computing machine 10.In addition, this device that is used for the digital imagery processing can comprise the video display 16 that is connected with processor 9 and video plotting apparatus 16.
The CCD gamma camera comprises an A/D converter 8.In this converter 8, will corresponding to each figure image point, limit its position and brightness or gray-scale value, also be that each conversion of signals of its light intensity becomes digital signal corresponding.In order enough accurately to describe light intensity by digital signal, the overall brightness range that covers must be subdivided into working majority purpose gray shade scale.Number of grayscale levels should be at least 128, and can obtain good effect when 256 gray shade scales are set.
Processor 9 mainly has translation function, and it converts raw video signal the video image of conversion to according to known image processing method, and it has better contrast than raw image.Can use the image processing plate that can obtain from the market for described this presentation manager 9.
Processor 9 comprises video memory, and storage therein has the video image that has improved contrast.
Use processor video image 9 conversion and that improved image contrast to constitute the basis of carrying out image processing subsequently now by computing machine 10.
The picture information of storing in the video memory according to processor 9 is carried out the exploitation that vertical fibers ratio and degree of crimping calculate employed algorithm and is realized by using bidimensional function wavelet transfer algorithm in computing machine 10.
(a, b θ) express bidimensional function wavelet transform, and wherein a is the expansion scale-up factor, and b is that displacement parameter and θ are direction parameters with 4 dimension spaces.
A preferred analytical approach is: scanning image is carried out 2D MORLET wavelet transform, for example, on every in image, all expansion ratios be 0.05≤a≤0.6 (this ratio corresponding to for the zooming rate of 7.5 pixels/mm at ratio (0.36mm; 4.27mm) enterprising line scanning, this magnification can be according to the observation the change in size in zone) and all directions be: 0≤θ≤180, wherein θ=0 is corresponding to vertical direction.(a θ) will obtain (a, b, two-dimensional figure θ) corresponding to MORLET wavelet transform coefficients Cf for each.This analysis is made with angle θ=10 ° and expansion ratio a=0.05.
At last, only use MORLET wavelet transform coefficients MCTO (a, the mean value of mould θ), and with ratio a (a, θ) summation is to obtain accumulated value C (θ) to coefficient MCTO.
According to these accumulated values C (θ), calculating the vertical fibers ratio on expansion ratio 0.3≤a≤0.6 and on expansion ratio 0.05≤a≤0.3, calculating degree of crimping; Certainly, these ratios can change according to the characteristic of mineral wool product and the standard of being studied.Then, can represent vertical fibers ratio section and degree of crimping section with figure.These calculating can be undertaken by following formula:
In the formula, Tfv=vertical fibers ratio
Cos (2, θ)=weighting coefficient
N=18,
In the formula: σ=standard deviation amount
n＝18。
In order to calculate vertical fibers ratio and degree of crimping, therefore, should fully understand on a zone of mineral wool band 1 actual light intensity or brightness and represent what kind of is, so that can derive the situation of vertical fibers ratio and degree of crimping immediately by them with the digital value form of each point of image.Best, according in mineral wool band 1 the same side but a plurality of images in succession that absorb on the different location calculate, the result of calculation of accumulated value is wherein averaged, so that obtain final value.
And the thickness of being easy to act as pad is most made appraisal to the first half and the latter half of mineral wool band 1 thickness, and per half part acquisition value is made Difference Calculation, so that obtain the more pinpoint accuracy of fibre structure in mineral wool mat general direction during greater than 40mm.
Fig. 3 with the block diagram form represent, for example during single video image evaluation, how computing machine 10 is handled each point on the image.The digitized measured value L of the brightness on each point of image is sent to Gauss (Gaussien) wave filter 18 in the frequency domain by lead 17.The signal that occurs at this Gaussian filter 18 output terminals corresponding to: for given a and given θ, the mould Cf of 2D MORLET wavelet transform coefficients (a, b, θ).This signal Cf (a, b θ) are sent to a summing stage 20, form therein MORLET wavelet transform coefficients mould mean value MCTO (a, θ); At this moment the latter is transmitted to a summing stage 21, forms coefficient MCTO (a, accumulated value θ): C[0.05 with expansion ratio 0.05≤a≤0.3 in this summing stage; 0.3] (θ), and above-mentioned mean value is transmitted to another summing stage 22, forms coefficient MCTO (a, accumulated value θ): C[0.3 with expansion ratio 0.3≤a≤0.6 in this summing stage; 0.6] (θ).Accumulating signal C[0.05; 0.3] (θ) be sent to a subtraction stage 23, form the typical deviate of accumulation therein, and accumulating signal C[0.3; 0.6] be sent to a subtraction stage 24, form the weighted calculation of vertical fibers ratio therein.Line 25 and 26 at subtraction stage 23 and 24 each outgoing side respectively carries a signal now, and they are respectively directly corresponding to belonging to fiber degree of crimping and the vertical fibers ratio of measuring visual place.These signals can be sent to each unit shown in Fig. 2 now, are used for calculating further and/or storing.
Be described in name about bidimensional function wavelet transform, the especially more detailed situation of 2D MORLET wavelet transform and be called " ONDES ET ONDELETTES, la sage d ' un outilmathematique " (" involving wavelet; a kind of argumentation of digital tool "), Barbara BURKEHUBBARD work, BELIN POURLA SCIENCE publishing house publishes.
The signal processing results of Zhi Hanging can show and store in any way in the above described manner.
A kind of display mode can represent that this demonstration also can be that the reproduction of the video image of record shows with the record display mode in Fig. 4 and 5.
Fig. 4 goes out coefficient MCTO on expansion ratio 0.05≤a≤0.3 (a, a section of accumulated value θ) with polar coordinate representation.The typical deviate of accumulated value is visually represented highlightedly with the round track of representing maximal value and minimum value in the drawings.
Fig. 5 goes out coefficient MCTO on expansion ratio 0.3≤a≤0.6 with polar coordinate representation, and (wherein the dominant direction of fiber is visually represented highlightedly with connecting peaked straight path for a, a section of accumulated value θ).
The position of machine direction mismatch and numerical value-especially under the situation that crimps the mineral wool rim strip-can detect in this wise and storage automatically.These data can be sent to automated system by coupling interface, can shear the mineral wool band and to the cushion of mineral wool sorting, perhaps regulate the vertical compressibility that crimps part according to these data according to these data and according to different quality requirementss in this system.
This definite method also can be applicable to the static product in the production line occasion in addition.Advantageously, this product orientation of fibre structure makes properties of product, for example machinery or thermal characteristics really surely accurately the value with the value of vertical fibers ratio and degree of crimping is relevant.The analysis of this correlativity then can provide better understanding and the control to mineral wool product.
The present invention will be not limited on this embodiment and be interpreted as nonrestrictive, it comprises all Method types that are used for determining fibre structure in mineral wool mat, wherein definite zone of cushion of mineral wool is illuminated on the incident angle that tilts, an image in described at least zone is recorded on the gamma camera in the measurement range, this gamma camera extends perpendicular to the plane in described zone in fact, be assigned with a digital signal on every of image corresponding to its light intensity, this digitizing can directly be carried out in gamma camera or carry out in being installed in the digitizing level of its subordinate, determines vertical fibers ratio and degree of crimping by means of image processing system by digital light intensity signal.
Claims (10)
- Cushion of mineral wool, especially crimp definite method of the machine direction of cushion of mineral wool, wherein:Illuminate definite zone of cushion of mineral wool with certain oblique incidence angle,At at least one image that is basically perpendicular to the described zone of record on the gamma camera of being placed on the axle of this area planar;Distribute the digital signal corresponding to its light intensity to every of image, this digitized processing is directly in gamma camera or be installed on the digitizing level of back and carry out,By an image processing system, determine vertical fibers ratio and degree of crimping according to the digital signal of light intensity.
- 2. according to the method for claim 1, it is characterized in that: vertical fibers ratio and fiber degree of crimping are obtained by digital light intensity calculated signals by means of bidimensional function wavelet transform algorithm.
- 3. according to the method for claim 2, it is characterized in that: wherein use 2DMORLET wavelet transform algorithm.
- 4. according to each method in the above claim, it is characterized in that: at least four images in the described zone that record absorbs from different places on a CCD gamma camera; Presentation manager is applied to each recording picture; And in the end calculate the value that will obtain before vertical fibers ratio and the fiber degree of crimping and average.
- 5. according to each method in the above claim, it is characterized in that: described zone is divided into two parts at least; Each that reaches for these parts determined its orientation of fibre structure.
- 6. according to each method in the above claim, it is characterized in that: cushion of mineral wool is placed on the moving conveyor belt.
- 7. implement the device according to the method for claim 1, it is characterized in that: it comprises: a lighting device, and this lighting device is along a definite zone of oblique incidence angle irradiation cushion of mineral wool; A CCD gamma camera, this gamma camera are placed on the axle that is substantially perpendicular to described area planar; And image processing system.
- 8. according to the device of claim 7, it is characterized in that: image processing system comprises a filtering stage, and described filtering stage is carried out filtering by means of the wave filter that produces bidimensional linear transformation, for example 2D MORLET wavelet transform in image field.
- 9. be applied to according to each method in the claim 1 to 6: the data of correlativity between the machinery of acquisition cushion of mineral wool and/or thermal characteristics and resulting vertical fibers ratio and the degree of crimping.
- 10. be applied to according to each method in the claim 1 to 6: the robotization of cushion of mineral wool production line, automatically regulate crimping the vertical compression speed of part according to the data that obtained with permission.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| FR9805077 | 1998-04-23 | ||
| FR98/05077 | 1998-04-23 |
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| Publication Number | Publication Date |
|---|---|
| CN1272918A true CN1272918A (en) | 2000-11-08 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN99800990A Pending CN1272918A (en) | 1998-04-23 | 1999-04-15 | Method for determining orientation of fibre structure in mineral wool mat |
Country Status (13)
| Country | Link |
|---|---|
| EP (1) | EP0991936A1 (en) |
| JP (1) | JP2002507286A (en) |
| KR (1) | KR20010014112A (en) |
| CN (1) | CN1272918A (en) |
| AR (1) | AR019093A1 (en) |
| AU (1) | AU3154599A (en) |
| BR (1) | BR9906374A (en) |
| CA (1) | CA2294441A1 (en) |
| HU (1) | HUP0002544A2 (en) |
| NO (2) | NO996406D0 (en) |
| PL (1) | PL337514A1 (en) |
| SK (1) | SK181299A3 (en) |
| WO (1) | WO1999056112A1 (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN104034734A (en) * | 2014-06-25 | 2014-09-10 | 深圳市云特科技有限公司 | Winch steel cable detection device and method thereof |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US7695592B2 (en) * | 2005-04-21 | 2010-04-13 | Honeywell International Inc. | Method and apparatus for measuring fiber orientation of a moving web |
| US7164145B2 (en) * | 2005-05-12 | 2007-01-16 | Honeywell International Inc. | Measuring fiber orientation by detecting dispersion of polarized light |
| FR2901023B1 (en) * | 2006-05-10 | 2008-07-04 | Saint Gobain Isover Sa | METHOD OF DETECTING LOCALIZED DEFECTS IN MINERAL FIBER MATTRESS |
| JP5168049B2 (en) * | 2008-09-24 | 2013-03-21 | オムロン株式会社 | Image processing method and image processing apparatus |
| LT5733B (en) | 2010-04-19 | 2011-06-27 | Andrius Buska | MINERALINES VATOS GAMINIU FIZIKINIU IR MECHANINIU SAVYBIU NUSTATYMO BuDAS |
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|---|---|---|---|---|
| US4730931A (en) * | 1986-05-23 | 1988-03-15 | Eastman Kodak Company | Method and apparatus for optically monitoring fiber orientation in nonwoven webs |
| US5436980A (en) * | 1988-05-10 | 1995-07-25 | E. I. Du Pont De Nemours And Company | Method for determining quality of dispersion of glass fibers in a thermoplastic resin preform layer and preform layer characterized thereby |
| EP0799348B1 (en) * | 1994-12-19 | 1999-05-12 | Siemens Aktiengesellschaft | Process and device for detecting and influencing transversally given properties of paper webs |
| JP2889518B2 (en) * | 1995-10-18 | 1999-05-10 | 山口県 | High-speed quality evaluation method for extruded granulated products |
| US5640244A (en) * | 1995-11-02 | 1997-06-17 | Abb Industrial Systems, Inc. | Method and apparatus for on-line determination of fiber orientation and anisotropy in a non-woven web |
-
1999
- 1999-04-15 WO PCT/FR1999/000882 patent/WO1999056112A1/en not_active Application Discontinuation
- 1999-04-15 KR KR19997012162A patent/KR20010014112A/en not_active Application Discontinuation
- 1999-04-15 JP JP55370899A patent/JP2002507286A/en active Pending
- 1999-04-15 CA CA002294441A patent/CA2294441A1/en not_active Abandoned
- 1999-04-15 EP EP99913415A patent/EP0991936A1/en not_active Withdrawn
- 1999-04-15 HU HU0002544A patent/HUP0002544A2/en unknown
- 1999-04-15 AU AU31545/99A patent/AU3154599A/en not_active Abandoned
- 1999-04-15 SK SK1812-99A patent/SK181299A3/en unknown
- 1999-04-15 BR BR9906374-3A patent/BR9906374A/en not_active Application Discontinuation
- 1999-04-15 CN CN99800990A patent/CN1272918A/en active Pending
- 1999-04-15 PL PL99337514A patent/PL337514A1/en unknown
- 1999-04-22 AR ARP990101853A patent/AR019093A1/en unknown
- 1999-12-22 NO NO996406D patent/NO996406D0/en unknown
- 1999-12-22 NO NO996406A patent/NO996406L/en not_active Application Discontinuation
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104034734A (en) * | 2014-06-25 | 2014-09-10 | 深圳市云特科技有限公司 | Winch steel cable detection device and method thereof |
| CN104034734B (en) * | 2014-06-25 | 2017-01-25 | 深圳市云特科技有限公司 | Winch steel cable detection device and method thereof |
Also Published As
| Publication number | Publication date |
|---|---|
| NO996406L (en) | 1999-12-22 |
| KR20010014112A (en) | 2001-02-26 |
| JP2002507286A (en) | 2002-03-05 |
| AR019093A1 (en) | 2001-12-26 |
| BR9906374A (en) | 2000-07-11 |
| CA2294441A1 (en) | 1999-11-04 |
| WO1999056112A1 (en) | 1999-11-04 |
| EP0991936A1 (en) | 2000-04-12 |
| SK181299A3 (en) | 2000-07-11 |
| NO996406D0 (en) | 1999-12-22 |
| PL337514A1 (en) | 2000-08-28 |
| HUP0002544A2 (en) | 2000-11-28 |
| AU3154599A (en) | 1999-11-16 |
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