Let w e R is an n-dimensional column vector, and f(w) ER is a function of...
Fantastic news! We've Found the answer you've been seeking!
Question:
Transcribed Image Text:
Let w e R" is an n-dimensional column vector, and f(w) ER is a function of w. In Lecture 2, we have defined the gradient Vf(w) E R" and Hessian matrir HE R"xn of f with respect to w. (a) 5 points] Let f(u) = wTr, where r € R" is a n-dimensional vector. Compute Vf(w) using the definition of gradient. (b) 5 points] Let f(w) = tr(wwTA), where A € Rxn is a squared matrix of size n x n, and tr(A) is the trace of the squared matrix A. Using the definition of gradient, compute Vf(u). (Hint: you can use the property of trace: tr(AB) = tr(BA)) (e) 5 points] Let f (w) = tr(uw" A). Compute the Hessian matriz H of f with respect to w using the definition. HE. Let f(w) = log(o(wTr)), (d) [5 points] In Lecture 5, we have define the sigmoid function: o(a) %3D where log is the natural logarithmic function. Compute Vf(w) using the definition of gradient. d log(a(a) with wx, then you can use the chain rule to first compute the derivative (Hint: let a = respect to a and then compute the gradient of a with respect to w) da Let w e R" is an n-dimensional column vector, and f(w) ER is a function of w. In Lecture 2, we have defined the gradient Vf(w) E R" and Hessian matrir HE R"xn of f with respect to w. (a) 5 points] Let f(u) = wTr, where r € R" is a n-dimensional vector. Compute Vf(w) using the definition of gradient. (b) 5 points] Let f(w) = tr(wwTA), where A € Rxn is a squared matrix of size n x n, and tr(A) is the trace of the squared matrix A. Using the definition of gradient, compute Vf(u). (Hint: you can use the property of trace: tr(AB) = tr(BA)) (e) 5 points] Let f (w) = tr(uw" A). Compute the Hessian matriz H of f with respect to w using the definition. HE. Let f(w) = log(o(wTr)), (d) [5 points] In Lecture 5, we have define the sigmoid function: o(a) %3D where log is the natural logarithmic function. Compute Vf(w) using the definition of gradient. d log(a(a) with wx, then you can use the chain rule to first compute the derivative (Hint: let a = respect to a and then compute the gradient of a with respect to w) da
Expert Answer:
Related Book For
Essential University Physics
ISBN: 978-0321976420
3rd Edition Volume 2
Authors: Richard Wolfsonby, Richard Wolfson
Posted Date:
Students also viewed these mathematics questions
-
The potential as a function of position in a region is given by V(x) = 3x - 2x 2 x 3 , with x in meters and V in volts. Find (a) All points on the x-axis where V = 0, (b) An expression for the...
-
We have defined the Laplacian of a scalar field by Show that if Dnf is the directional derivative in the direction of the unit normal vector n, then ?f, 'f ? Vf = ? ? 22
-
Find the potential as a function of position in the electric field E(vector) = axi, where a is a constant and where youre taking V = 0 at x = 0.
-
Since graduation from college, your friend William has become a highly paid and successful financial advisor. His list of clients is long, and his advice is sought by many. Discuss the merits of the...
-
Draw the most stable conformation for each of the following substituted cyclohexanes; then, in each case, flip the ring and redraw the molecule in the higher energy chair conformation: (a)...
-
The trusses are pin connected and suspended from the parabolic cable. Determine the maximum force in the cable when the structure is subjected to the loading shown. E, 14 ft 6 ft K 16 ft G H B V4 k 5...
-
What does argv provide to our program?
-
Demand for Quiggly Pops follows an up and down pattern over the four quarters of a year, with peaks in the spring and winter months when special promotions are held. Production is handled by a highly...
-
Beddington and May (1982) have proposed the following model to study the interactions between baleen whales and their main food source, krill (a small shrimp-like animal), in the southern ocean: - x...
-
The following information is available for ADT Company, which produces special-order security products and uses a job order costing system. Overhead is applied using a predetermined overhead rate of...
-
What is each partners share of the loss? Miskai invests 425,000 and Donald invests 260,000 in a partnership. Net income is divided in proportion to their investment. Their net loss for the first year...
-
Sales revenue for Marshall Mattresses was $240,000. The following data are from the accounting records of Marshall: Bad debt expense $2,000 Accounts receivable decrease 5,000 Allowance for...
-
if my initial investment is 2550000.00 and the discount rate is 7%, what is the net present value of year zero
-
7) How long should cancelled checks, accounts payable and accounts receivable ledgers be retained by a taxpayer?
-
Zone C3: Refer to the 1.000 basic dimension. What is the tolerance? D B NOTICE OF PROPRIETARY RIGHTS This document centains contdential technical data, including trade secrets and proptelowy...
-
Find the limits 1. lim x2x-3 3x-5x +7 x+0 8+2x-5x ++3 3. lim 5. lim X x400x+2 818 7. lim : x-001-x 3x + 2x 9. lim 2x-1 x-00 3x+x+1 2. lim x im x2 - 4 818 x-2 x41x1x 4. lim x + sin x 818 x-00x+ cos x...
-
Compute the amount of raw materials used during November if $ 3 6 , 0 0 0 of raw materials were purchased during the month and if the inventories were as follows: Inventories Balance November 1...
-
Pappa's Appliances uses the periodic inventory system. Details regarding the inventory of appliances at January 1, purchases invoices during the year, and the inventory count at December 31 are...
-
Show that the orbital radius of a charged particle moving at right angles to a magnetic field B can be written r = 12Km/qB, where K is the kinetic energy in joules, m the particles mass, and q its...
-
Write a complete equation for neutron-induced fission of plutonium-239 that yields barium-143, two neutrons, and another nucleus.
-
A wire carrying 1.5 A passes through a 48-mT magnetic field. The wire is perpendicular to the field and makes a quarter-circle turn of radius 21 cm in the field region, as shown in Fig. 26.42. Find...
-
In the January 1, 20X8, consolidated balance sheet, the amount of goodwill reported should be a. $0. b. $76,000. c. $95,000. d. $156,000. On January 1, 20X8, Ritt Corporation acquired 80 percent of...
-
In the December 31, 20X8, consolidated balance sheet, the amount of noncontrolling interest reported should be a. $200,000. b. $239,000. c. $251,000. d. $252,000. On January 1, 20X8, Ritt Corporation...
-
On January 1, 20X5, Post Company acquired an 80 percent investment in Stake Company. The acquisition cost was equal to Posts equity in Stakes net assets at that date. On January 1, 20X5, Post and...
Study smarter with the SolutionInn App