baber/WOPTO huggingface dataset:
Patent CN-113568055-B (CN)
IPC: G01V3/38
Filed: 2021-07-16
Granted: 2022-07-01
Abstract: 本发明公开了一种基于LSTM网络的航空瞬变电磁反演方法，包括以下步骤：1)生成含航空瞬变电磁响应数据、收发装置高度和电阻率模型的合成数据集；2)根据合成数据维度建立LSTM网络，输入数据为航空瞬变电磁时域信号，传感器高度拼接至特征层中参与运算，输出数据为电阻率模型参数；3)根据误差下降曲线选取合适的训练集规模和训练周期，确保训练效果和训练效率，完成网络训练；4)根据网络反演结果及其正演响应的拟合情况判断网络的泛化能力；5)利用LSTM网络完成航空瞬变电磁数据反演，获得地下介质的电阻率分布结构。该反演方法稳定准确，计算速度快，能够提升航空瞬变电磁数据解释效率，进而为航空瞬变电磁数据实时成像提供技术支撑。
Patent CN-113528837-B (CN)
IPC: C22B15/00
Filed: 2021-07-26
Granted: 2022-03-25
Abstract: 一种废旧线路板铜粉预处理分选脱除杂质金属的方法，废线路板铜粉在球磨罐中用硫酸溶液浸出，使其中的铝和铁选择性浸出；得到的浸出渣烘干后采用机械筛分的方式使铅和锡分离进入细颗粒，铜富集于粗颗粒；最后采用控电位硫酸氧化浸出的方式处理细颗粒，使其中少量的铜溶解。本发明的实质是采用化学浸出和机械处理相结合的方式选择性脱除废线路板铜粉中的杂质金属，解决了废线路板铜粉中杂质金属对火法炼铜的危害问题以及实现了金属资源的回收利用。
Patent CN-113458899-B (CN)
IPC: H01F41/02
Filed: 2021-09-01
Granted: 2021-12-10
Abstract: 本发明公开了一种用于软磁铁生产的毛边清除装置，包括底座，所述底座上表面固定连接有两个竖板，每个所述竖板均通过轴承贯穿转动连接有两个转动杆，所述转动杆位于两个竖板之间的一端固定连接有连接板，同侧的两个所述连接板共同通过销轴转动连接有功能板，两个所述功能板均通过轴承转动连接有若干安装杆，所述安装杆远离对应的所述功能板的一端固定连接有承物块，所述承物块上表面为弧面，所述承物块下表面为水平面。优点在于：本发明可以对不同形状的材料进行取出毛边，其适用面更广，且自动化程度更高，大大提高了加工效率，还可以避免毛边去除后的粉尘粘附在材料上，避免了后续处理，同时可以进行不同长度材料的毛边去除。
Patent CN-113492395-B (CN)
IPC: B25J9/00
Filed: 2021-09-09
Granted: 2021-11-16
Abstract: 本发明公开了一种智能机械制造用的机械配件夹持设备，涉及机械制造技术领域，解决了现有夹持设备主要为定向夹持，不具备根据需要切换水平和垂直抓取方向的高适用性调整功能，不利于夹持固定的问题。一种智能机械制造用的机械配件夹持设备，包括底座，所述底座的主体为L形结构，底座的顶部固定设置有提升器，提升器一侧与底座后端之间铰接设置有提升电缸；提升器的顶部中间一体式设置有圆柱结构，圆柱结构外部设置有蜗轮，通过设置有提升座和折座，提供了切换水平和垂直抓取方向的高适用性调整功能，需要转换抓取方向的时候，第二电缸、第二电缸和铰接座构成了滑块结构，能够将折座转向度，使夹件的抓取方向向下，进而实现夹持工作方向的调整。
Patent CN-114337778-B (CN)
IPC: H04B7/185
Filed: 2021-12-28
Granted: 2022-06-24
Abstract: 本发明公开了一种基于联合概率的卫星通信频轨资源数据修正方法，包括以下步骤：首先，根据等权均值白化方法对公开数据进行白化处理；然后采用半监督学习的方法，利用数据库中申报数据和实际使用数据训练联合概率模型；利用得到的联合概率模型，修正白化数据；利用修正后的白化数据反演得到修正数据，补充数据库。该方法主要有以下优点：采用联合概率修正的方法，数据修正准确度高；采用半监督学习的方法，利用结合公开数据和数据库数据训练联合概率模型，模型精确度高、实现简单、避免了大量的人工标注的工作；该卫星通信频轨资源数据修正算法，实现的复杂度低，可方便的进行快速构建。
Patent CN-114076515-B (CN)
IPC: F26B25/02
Filed: 2022-01-07
Granted: 2022-04-05
Abstract: 本发明公开了一种新型晶圆表面烘干装置，包括烘干框架，所述烘干框架正面和背面均安装有横档，两组所述横档相互远离的表面安装有检测框和标记框架，前方所述横档的顶部安装有输送风机；所述输送风机的背面安装有连接框架，所述输送风机的顶部安装有红外温度计，所述连接框架的底壁安装有中空的金属管，所述金属管的内部安装有三组等距布置的导气管，所述电子阀与红外温度计电性连接，所述导气管的顶部嵌合连接有液氮管。本发明通过设置有输送风机和标记框，可通过标记框底部的超声波测距仪检测晶圆表面是否发生胀包现象，并利用电动伸缩杆、电推杆和标记板对胀包晶圆进行标记，随后利用输送风机进行筛选分类，实现良品和不良品的区分。
Patent CN-114167734-B (CN)
Title: 一种强耦合非线性系统高精度控制方法及控制系统
IPC: G05B13/04
Filed: 2022-02-14
Granted: 2022-04-22
Abstract: 本发明涉及一种强耦合非线性系统高精度控制方法及系统，适应复杂航天器强耦合非线性的动力学特性，采用超螺旋滑模干扰观测器对耦合项进行解耦，采用反步控制法对解耦后模型中的非线性特性进行控制，克服传统方法对精确建模需求高、鲁棒性低等缺点，在被控对象姿态系统稳定的前提下，保证控制精度，满足任务需求，同时对于系统中的未建模特性与干扰不敏感，鲁棒性强，提高了系统的控制精度。
Patent CN-114298053-B (CN)
IPC: G06F40/30
Filed: 2022-03-10
Granted: 2022-05-24
Abstract: 本发明提供一种基于特征和注意力机制融合的事件联合抽取系统，包括：输入层、特征提取层、触发词和论元识别层和事件后处理层；将预训练层输出的信息结合词性和位置信息输入到BiGRU和CNN中，得到句子的上下文语义特征矩阵和局部特征矩阵，再利用注意力机制融合这两种特征，最后将三种表示联合起来进行事件抽取；词嵌入层使用预训练模型BioBERT，并对其进行微调，以提高模型的效果；事件联合抽取，避免了级联错误的产生，提升模型的效果。
Patent GE-P19991881-B (GE)
Title: Method for Searching the Regions, Perspective for Magmatogene and Sedi¬men¬togene Deposits of Mineral Resources
Inventor: GUGUNAVA GURAM
IPC: G01V11/00
Filed: 1998-02-23
Abstract: Simplification of revealing perspective re¬gions.           2. Essence A method comprises on the basis of treatment of the initial materials (duplicate negatives) calculating temperatures and plotting them on the maps of different levels with the purpose of creation of thermal “tomographic” model, that enables receiving of thermo-shifts in any preset point of the plotting table, introducing them into the treatment block and on the basis of the conversion of these vectogramms population to reveal the three-dimensional thermodensity anomalies, allowing to determine the regions, perspective for magmatogene and sedimentogene deposits of mineral resources.           3. Field of Application Geophysics.
Patent GE-P20033068-B (GE)
Title: Processes for Preparation of Pyrazolo[4,3-d]Pyrimidin-7-Ones-3-Pyridylsulphonyl Compounds and Intermediates Thereof
Inventor: WOOD ALBERT HAW
IPC: A61P15/12
Filed: 2000-10-11
Abstract: 1. Tehnical Result Increase in efficiency of medicinal means.         2. Essence A method for preparation of the compounds of the formula (I) comprises interaction of the compounds of the formula (II), (III) or (IV) (provided in the specification) with OR in the presence of retention agent of hydroxide or in the case of then compound, the formula (IV), the interaction with the auxiliary base and the retention agent of hydroxide, wherein X is a group and the values of R-R4 are provided in the description.            3. Field of Application Medicine.
Patent GE-P20196986-B (GE)
Title: METHOD FOR OBTAINING VOLUME CRYSTALS InAs-CaAs FROM HARD SOLUTIONS
Inventor: LEPL – F TAVADZE INSTITUTE OF METALLURGY AND MATERIALS SCIENCE
IPC: C30B30/04
Filed: 2016-05-11
Abstract: A method for obtaining volume crystals InAs-CaAs from hard solutions provides mixing the componentry: InAs and CaAs; melting and crystallization thereof; at that, the baking is carried out at the temperature of 942C-1240C.
Patent CA-1294096-C (CA)
Title: Molded racquet with fibre core and method for making same
Inventor: MOTT JONATHAN C
IPC: A63B49/10
Filed: 1986-03-11
Granted: 1992-01-14
Abstract: MOLDED RACQUET WITH FIBRE CORE  AND METHOD FOR MAKING SAME          ABSTRACT OF THE DISCLOSURE      A method of making a fibre-reinforced molded racquet frame is disclosed. The method comprises placing two cores each including a respective tube having at least one layer of woven reinforcing fibres in a mold shaped to define the frame. A respective core is positioned on each side of the split-line of the mold. A plurality of string-securing members are formed with each string-securing member com-prising a first portion shaped to receive and position at least one string of stringing to be secured in the frame and a second portion adapted to be embedded in the frame. The string-securing member is supported such that, upon closure of the mold, the second portions are disposed inside the mold cavity and entrapped between the two cores while the first portions project out of the mold cavity into the area which will be surrounded by the mold frame. A plastics material is injected into the mold around the cores and the second portions of the string-securing members. The plastics material preferably has a rela-tively low setting temperature and a relatively low viscosity.
Patent CA-1283297-C (CA)
Inventor: DE LASSAT DE PRESSIGNY YANN
IPC: C21B5/00
Filed: 1986-05-06
Granted: 1991-04-23
Abstract: The tuyere comprises a substantially cylindrical or slightly convergent frusto-conical downstream part, and a divergent frusto-conical upstream part; the plasma torch is placed co-axially to the tuyere at the inlet to the upstream part thereof; the solid materials injection nozzle issues at an angle into the upstream part of the tuyere and the angle of taper of the upstream part of the tuyere substantially corresponds to the angle of natural expansion of the plasma jet, so that said materials are carried with the plasma jet and that part of them are provided onto the inner wall of the tuyere.
Patent CA-1295559-C (CA)
Title: Method for labeling polynucleotide sequences
Inventor: STAVRIANOPOULOS JANNIS
IPC: C07H21/00
Filed: 1986-08-07
Granted: 1992-02-11
Abstract: ABSTRACT            A method for labeling a polynucleotide sequence to form a polynucleotide probe is disclosed.  The method comprises forming a modified polynucleotide sequence wherein the modification comprises the cleavage of preselected bases to generate sugar aldehydes.  The preselected bases are either quaternized nitrogen purines or uracil.  A signalling moiety is attached to the modified polynucleotide sequence by means of the sugar aldehydes.
Patent CA-1308479-C (CA)
Title: Signal processing circuit for composite color television signal
Inventor: OKUDA AKIHIDE
IPC: H04N9/78
Filed: 1986-09-18
Granted: 1992-10-06
Abstract: ABSTRACT OF THE DISCLOSURE          A signal processing circuit for a composite color television signal for separating luminance signal Y and color difference signal C comprises a frame memory for storing the composite color television signal, motion detecting means for detecting motion of a picture image on the basis of the signal read out from the frame memory, vertical correlation detecting means for detecting magnitude of vertical correlation of pictures on the basis of the signal read out from the frame memory, a vertical-axis filter for performing YC-signal separation through filtering operation in the vertical-axis direction, a vertical-axis filter for performing YC-signal separation through filtering operation in the vertical direction, a time-axis filter for performing filtering operation in the time-axis direction, a two-dimensional filter for performing YC-signal separation through filtering operation in both the horizontal and vertical directions, and mixing means for mixing the outputs of the three filters in accordance with the magnitude of motion and the magnitude of vertical correlation.
Patent CA-1334992-C (CA)
Title: Thermoelectrochemical system and method
Inventor: LUDWIG FRANK A
IPC: H01M8/18
Filed: 1986-10-07
Granted: 1995-03-28
Abstract: A thermal electrochemical system in which an electrical current is generated between a cathode immersed in a concentrated aqueous solution of phosphoric acid and an anode immersed in a molten salt solution of ammonium phosphate and monohydric ammonium phosphate.  Reactants consumed at the electrodes during the electrochemical reaction are thermochemically regenerated and recycled to the electrodes to provide continuous operation of the system.
Patent CA-1282172-C (CA)
Title: Photoelectric conversion device
Inventor: SUGAWA SHIGETOSHI
IPC: H04N5/335
Filed: 1986-11-12
Granted: 1991-03-26
Abstract: ABSTRACT          A photoelectric conversion device is provided including a plurality of phototransistors having a control electrode region of first conductivity type semiconductor for storing photo-excited carrier.  The phototransistors also have at least two of first semiconductor region of second conductivity type different from the first one, second semiconductor region of the second conductivity type, and third semiconductor region of the second conductivity type.  The device includes a signal read out connected electrically to each second semiconductor region, for reading an output signal based on the carrier stored on the control electrode region of the corresponding phototransistor.  A peak signal reading means electrically connected to each of said third semiconductor region is provided for reading a peak output signal at each photo-transistor on the basis of carrier stored in the control electrode region of each phototransistor.  The device accordingly can read light information from a semiconductor region separately from the electrode region.  The device can for example measure the incident light quantity or detect a peak value carried out in parallel as a store or read operation resulting in a high speed operation of the device.  Further use of a circuit for processing light information based on a detected value enables a stable reading of the light information and a simplified design of a signal processing circuit at the following stage.
Patent CA-1287139-C (CA)
Title: Transducer interface
Inventor: GIMBLETT CHRISTOPHER F
IPC: G01D3/02
Filed: 1986-11-19
Granted: 1991-07-30
Abstract: ABSTRACT OF THE DISCLOSURE           An  addressable  transducer  interface  which  may  be associated with a particular electrical transducer, comprises means (107) for storing correction data for the correction of errors as herein defined relating to that transducer so that on addressing of the interface by external control means, the correction data may be transmitted to the control means together with measurement data from the transducer.  The storing means is arranged to store said correction data  in digital  form.   The  interface  includes  an analogue to digital converter circuit which comprises means (305, 306) for changing a capacitor (303) of a given value from a source of constant current of a given value, voltage comparator means (310,  311,  312)  arranged to compare the value of an analogue voltage  signal  on an  input with the  charge voltage  in  said capacitor, a digital counter (301) arranged to start a count of cycles of a reference frequency when charging the capacitor is commenced from zero charge, a shift register (316, 317, 318) and a loading circuit arranged to cause the instantaneous count in said counter to be loaded into said shift register at the time when the charge in said capacitor is detected by said comparator as being equal to the value of the analogue signal.
Patent CA-1284020-C (CA)
Title: Concrete pipe making machine
Inventor: SCHMIDGALL HARTZELL H
IPC: B28B21/16
Filed: 1986-12-16
Granted: 1991-05-14
Abstract: ABSTRACT OF THE DISCLOSURE           A machine for making concrete pipe in which multiple-form sets can be coupled into one module so as to increase production output of the machine without an increase in machine manpower. The multiple-form modules are provided with adapters that make them compatible with conventional single-mode form sets and all cycles of production so that multiple-form modules can be usedsimultaneously with single-mode form sets. The multiple-form sets also utilize core vibration throughout the fill cycle, but unlike conventional core vibrationsystems, the amplitude and direction of vibration are continuously varied to distribute the vibration uniformly throughout the length of the pipe being formed.
Patent CA-1301282-C (CA)
Title: Station for detecting and locating through laser beams an object or a substance likely to diffuse back at least one part of the incident laser ray and system for sensing a substance such as smoke in particular of a fire such as a forest fire
Inventor: BROWN DE COLSTOUN FRANCOIS P D
IPC: G01S7/499
Filed: 1986-12-30
Granted: 1992-05-19
Abstract: ABSTRACT OF THE DISCLOSURE   A station for locating through laser rays an object likely to difffuse back a part of the incident laser ray, wherein the optical emitter and receiver devices consist of one single device comprising, in the direction of emission, a device for separating the emitted and retrodiffused rays, an optical device converting the emitted parallel beam of small diameter into a divergent beam and a telescope adapted to collimate the divergent beam received from the optical device into a parallel beam of larger diameter, the retrodiffused beam traveling that path in the direction reverse from the emitted beam, the invention being usable for detecting in particular forest fire smokes.
Patent CA-1326288-C (CA)
Inventor: BELMARES-SARABIA ARMAND
IPC: H04N9/64
Filed: 1987-03-02
Granted: 1994-01-18
Abstract: ABSTRACT OF THE DISCLOSURE An improved color correction system and method are disclosed.  A color corrector may include circuits for selecting a predetermined range of colors around an infinitely selectable principal color and circuits for selectively generating color corrections for the video picture signals which correspond to the predetermined range of colors.  The color corrections are then applied to the video picture signals  to produce color corrected video picture signals.  The color corrections may be stored and recalled on a scene-by-scene basis.  Two or more such circuits may be employed so that two or more different principal colors can be selected.  Preferably, the predetermined range of colors is adjustable.  A color corrector may also include circuits for storing and recalling area discrimination signals on a scene-by-scene basis.  Moreover, a color corrector may include circuits for identifying the color corrections for a particular scene with a video picture from that particular scene.  The video picture for the particular scene is displayed, and the operator may recall the color corrections by using the video picture together with an associated control.  More particularly, the area discrimination signals may define one or more rectilinear windows.  Different color corrections may be applied to the video signals within different windows.  Furthermore, one window can be established so that it surrounds another window, and the color corrections for the video signals within the inner window can have a predetermined transition, e.g., a linear transition, to the color corrections for the video signals outside the outer window.  That is, the color corrections may vary linearly in the region between the inner and outer windows.
Patent CA-1315601-C (CA)
Title: Railway truck
Inventor: DE STEUR WOLFRAM
IPC: B61F5/38
Filed: 1987-04-29
Granted: 1993-04-06
Abstract: A B S T R A C T         In order to steer yawing movements of wheel sets of a railway truck in opposite senses, the wheel sets are intercoupled through two relatively spaced pivotal arms each of which is coupled with an intercoupling mechanism.  Each of the two wheel sets is connected by means of the axle bearings forming cylindrical pivots with two  relatively spaced pivotal arms, each of which is pivotally connected through a spherical pivot with a middle part of an upwardly directed lever.  A first end of each lever is pivotally connected by means of a spherical pivot with the frame and the second end is pivotally connected by means of a spherical pivot with coupling means of the coupling mechanism.          The coupling means extends on substantially the same level as the second ends of the levers and couples at least the diagonally opposed levers.
Patent CA-1320906-C (CA)
Title: Interleukin-2 induced antineoplastic peptide
Inventor: TWARDZIK DANIEL R
IPC: A61K35/14
Filed: 1987-05-29
Granted: 1993-08-03
Abstract: Abstract of the Disclosure Methods and compositions are provided for production of novel polypeptides having antineoplastic activity.  Polypeptides are obtained by lymphokine activation of killer lymphocytes, solubilizing peptides from the cells with acidic ethanolic extraction and purification using chromatography.  The resulting peptides may be preapared by other techniques, such as synthesis or expression in nonmammalian or mammalian host cells.  The peptides find use in inhibition of neoplastic cell proliferation.
Patent CA-1290193-C (CA)
Inventor: HAAS FRED
IPC: E06B3/58
Filed: 1987-06-17
Granted: 1991-10-08
Abstract: ABSTRACT OF THE DISCLOSURE       A window structure adapted to be secured in position together with a second such window structure in side by side disposition in an opening in a building structure comprises a plurality of interconnected generally linear frame members, and engagement means on at least one said frame member adapted to be connected to a generally linear junction strip in turn adapted to be connected to an aligned frame member of a window frame of a second said window structure when said second window structure is disposed in said opening in side by side disposition with said window structure.
Patent CA-1276910-C (CA)
Title: Apparatus for metering materials in the form of pieces
Inventor: MATZ LUDWIG
IPC: B65D83/04
Filed: 1987-06-22
Granted: 1990-11-27
Abstract: ABSTRACT OF THE DISCLOSURE           An apparatus for removing portions of identical materials in the form of pieces by means of a sliding part which is encased in a dispensing container and operated from the outside and whose dispensing sector is filled from inside the container and can be emptied outward.   The sliding part is in the form of a tube section which has one or more dispensing sectors and is fed through an outer shell and a stripper is located adjacent. to the ejection orifice and is assigned to the dispensing sectors.
Patent CA-1299671-C (CA)
Title: Electronic stethoscopic apparatus
Inventor: SHUE MING-JENG
IPC: A61B5/02
Filed: 1987-06-26
Granted: 1992-04-28
Abstract: ABSTRACT                ELECTRONIC STETHOSCOPIC APPARATUS          An electronic stethoscopic apparatus includes: a housing device with a main body having a plurality of switches and jacks electrically installed therein; an audio-signal amplifying device consisting of substantially a pre-amplifying circuit device, a low pass filter and a volume controller disposed in the main body and electrically coupled with the switches and jacks; a battery supply replaceably provided in the main body and electrically connected to the audio-signal amplifying device; an audio-wave guiding device having transducers disposed therein for converting the audio wave into an electric signal and positioned on top of the main body and electrically connected to the audio-signal amplifying device; a wireless radio wave transmitting device also disposed in the main body to receive the electric signals and transmit the same as radio signals; an upper cover of the housing device connected to the top end of the main body and to the audio-wave guiding means: and a body contact device communicatively connected to the audio-wave guiding device; thereby, auscultation can be made through an earphone/speaker and/or recorder for accurate diagnosis, and besides, a remote auscultation or bedside group teachings can be achieved by turning on the wireless radio wave transmitting device enabling the radio wave signals to be received by those at a remote place.
Patent CA-1305543-C (CA)
Title: Methods of discriminating between contaminated and uncontaminated containers
Inventor: PLESTER GEORGE
IPC: G01N21/90
Filed: 1987-07-31
Granted: 1992-07-21
Abstract: ABSTRACT OF THE DISCLOSURE      Methods of discriminating between contaminated and uncontaminated containers prior to washing is disclosed characterized by the testing of the residue of the container to determine if the residue is residue of the original product packed in the container.  If the residue is not sufficiently similar to the original product, the container is rejected as contaminated.
Patent CA-1302996-C (CA)
Inventor: MARCHANT IAN M
IPC: B66C7/08
Filed: 1987-08-28
Granted: 1992-06-09
Abstract: ABSTRACT                      RAIL CLIP ASSEMBLY            The present application  describes  a  rail  clip assembly, particularly but  not exclusively for securing a crane rail to a flanged girder.   The  rail clip  assembly comprises a body member (1) which has a base portion (2) for connection a rail support surface (3) and a lip portion (4) which can, in use, overlie an edge of a rail (5).  The body member has a first surface (6) which, in use, extends  parallel to the rail and abuts a lateral face of the rail, a second surface (8) facing away from the first surface and an elongate slot (9)  for  receiving  a  connector  for  connecting the body member to the rail support surface.   The  slot (9) extends in a direction which is generally inclined with respect to the first surface (6).   The  assembly further  comprises a pivoting member  (13) which  pivots about  a point which is located on the body  member, the  pivoting member including an aperture (14) for registration with the slot (9) and for receiving the connector.   The pivoting  member (13)  has a surface which  contacts the  said second surface (8) of the body member, said second surface (8)  being at  an angle to the  plane  of  the rail  surface,  whereby lateral forces applied by  the rail  and transmitted  to the  body, to the pivoting member, to the said connector, and to the rail support.
Patent CA-1304008-C (CA)
Inventor: JOHNSON HOMER K
IPC: B01D63/02
Filed: 1987-09-01
Granted: 1992-06-23
Abstract: ABSTRACT     A device and method is disclosed for separating individual fluids (particularly gases) from a stream that contains more than one fluid.  The separator device is made up of a bundle of hollow fibers, which are fastened at each end into a resin tubesheet.  The fiber bundle is enclosed in a casing and in the center of the bundle is a perforated, distributor tube.  The pressure load on one tubesheet is carried by a movable flange in contact with the tubesheet.  At the other end of the separator the pressure load is carried by a stationary flange that seats against the tubesheet.          Pressurized fluid directed into the distributor tube flows into the fiber bundle.  The permeate fluids pass through the fiber walls and are carried out of the separator through outlets at each end.  The nonpermeate fluids bypass the fibers and are carried out of the separator through one or more outlets in the casing.   35,206-F                  -20-