initialization

问题 I am trying to solver the Unit Commitment problem (MIQP problem) by modelling the problem in CVXPY and using the CPLEX solver. I have been successful in getting everything to work with CVXPY using CPLEX. However, this was for a small system. Now I would like to do the same with a much larger system. Side Note: I have successfully solved the MIQP problem in MATLAB using CPLEX. For larger system in MATLAB, I have used an initial solution from a MILP formulation of the problem and limited the

问题 Background I am testing various saved models as part of an experiment, but one of the models comes from an algorithm I wrote, not from a sklearn model-fitting. However, my custom model is still a linear model so I want to instantiate a LinearModel instance and set the coef_ and intercept_ attributes to the values from my custom fitting algorithm so I can use it for predictions. What I tried so far: from sklearn.linear_model import LinearRegression my_intercepts = np.ones(2) my_coefficients =

问题 I'm building a model about airline scheduling by using genetic algorithms that generate a flight schedule on a daily basis and assigning the right aircraft too. Each chromosome represents a total of 50 flight legs a day(including the return trip that means 100 trips a day) and I have 42 legs, so obviously there will be repeated flight legs. The initial members are created randomly, and there are some constraints that must be satisfied to have a valid schedule. The problem is one of the

问题 I have some classes that create a graph with "back pointers". I tried to make the back pointers unowned (they'd create cycles otherwise) and initialize them in my init() , but that creates problems with self references. How am I supposed to get around this? class Parent { var child1:Child var child2:Child unowned var myOwner:Thing init(myOwner:Thing) { child1 = Child(parent: self) // Compiler errors here child2 = Child(parent: self) // and here self.myOwner = myOwner } } class Child { unowned

问题 I have some classes that create a graph with "back pointers". I tried to make the back pointers unowned (they'd create cycles otherwise) and initialize them in my init() , but that creates problems with self references. How am I supposed to get around this? class Parent { var child1:Child var child2:Child unowned var myOwner:Thing init(myOwner:Thing) { child1 = Child(parent: self) // Compiler errors here child2 = Child(parent: self) // and here self.myOwner = myOwner } } class Child { unowned

问题 The question that was put forth to me was: What will the value of uninitialized variables be in C++? Do we have to initialize all variables? What would be the rule for initializing variables? I've looked in my text as well as another text that I have on hand and can't seem to find the answer. Here's what I've attempted: The value of uninitialized variables in C++ depends on the previous value stored in the memory that the uninitialized variable is assigned to. Initializing all variables is

问题 The question that was put forth to me was: What will the value of uninitialized variables be in C++? Do we have to initialize all variables? What would be the rule for initializing variables? I've looked in my text as well as another text that I have on hand and can't seem to find the answer. Here's what I've attempted: The value of uninitialized variables in C++ depends on the previous value stored in the memory that the uninitialized variable is assigned to. Initializing all variables is

问题 I need a bit of help to understand how python initialising works. I have a class (Bar) with another class (Foo) as a field/variable. When I try to initialise this variable directly in Bar (not in the class __init__) all instances of Bar will point to the same Foo. But if I have an __init__ method, as in Bar2, each Bar2 instance will have a unique Foo instance. What is happening here? class Foo(): number = 0 class Bar(): foo = Foo() class Bar2(): foo = None def __init__(self): self.foo = Foo()

问题 I need a bit of help to understand how python initialising works. I have a class (Bar) with another class (Foo) as a field/variable. When I try to initialise this variable directly in Bar (not in the class __init__) all instances of Bar will point to the same Foo. But if I have an __init__ method, as in Bar2, each Bar2 instance will have a unique Foo instance. What is happening here? class Foo(): number = 0 class Bar(): foo = Foo() class Bar2(): foo = None def __init__(self): self.foo = Foo()

问题 I need a bit of help to understand how python initialising works. I have a class (Bar) with another class (Foo) as a field/variable. When I try to initialise this variable directly in Bar (not in the class __init__) all instances of Bar will point to the same Foo. But if I have an __init__ method, as in Bar2, each Bar2 instance will have a unique Foo instance. What is happening here? class Foo(): number = 0 class Bar(): foo = Foo() class Bar2(): foo = None def __init__(self): self.foo = Foo()