NeuralNetwork::NeuralNetwork(std::vector<int> sizes) : nlayers_(sizes.size()), sizes_(sizes) {
random_gen_ = boost::mt11213b(time(0));
// 高斯分布生成器
boost::normal_distribution<> nd(0.0, 1.0);
boost::variate_generator<boost::mt11213b&, boost::normal_distribution<>> var_gen(random_gen_, nd);
// 初始化基向量
for (size_t i = 1; i < sizes_.size(); ++i) {
// 每一层都有一个基向量，向量中的元素对应这一层的每一个神经元
Vector biases(sizes_[i]);
for (int j = 0; j < sizes_[i]; ++j) {
biases(j) = var_gen();
}
biases_.push_back(biases);
}
// 初始化权重向量
for (size_t i = 0; i < sizes_.size() - 1; ++i) {
// 相邻两个层之间都有一个权重矩阵，如果第 i 层和第 i + 1 层分别有 m 和 n 个神经元，
// 那么两层之间的权重矩阵的维度为 m * n
Matrix weights(sizes_[i + 1], sizes_[i]);
for (int row = 0; row < sizes_[i + 1]; ++row) {
for (int col = 0; col < sizes_[i]; ++ col) {
weights(row, col) = var_gen();
}
}
weights_.push_back(weights);
}
if (biases_.size() != weights_.size()) {
std::cout << "Biases and weights size not equal!";
}
}
//
// visit_struct
//
void Stub_Dump_Generator::visit_struct (const OASIS_PDL_Struct & s)
{
this->hfile_
<< "/// Stub_Dump method for for ::" << s.fq_name ("::") << std::endl
<< "void dump (std::ostream & output);" << std::endl;
this->cppfile_
<< function_header ("dump")
<< "void ::" << s.fq_name ("::") << "::"
<< "dump (std::ostream & output) {" << std::endl;
Stub_Dump_Variable_Generator var_gen (this->hfile_, this->cppfile_);
var_gen.parent_is_probe (false);
std::vector <OASIS_PDL_Complex_Type_Member *>::const_iterator
iter = s.members ().begin (), iter_end = s.members ().end ();
for (; iter != iter_end; ++ iter)
{
var_gen.name ((*iter)->name ());
// Call accept on the actual child type
(*iter)->type ()->accept (var_gen);
}
this->cppfile_
<< "}";
}
//
// visit_probe
//
void Stub_Dump_Generator::visit_probe (const OASIS_PDL_Probe & p)
{
// Make sure we know the base probe type.
const std::string base_probe =
p.has_base_probe () ?
("::" + p.base_probe ()->fq_name ("::")) : "::OASIS::Software_Probe";
const std::string & name = p.name ();
this->hfile_
<< std::endl
<< "public:" << std::endl
<< "/// Stub_Dump the software probe's data." << std::endl
<< "virtual void dump (std::ostream & output);" << std::endl;
// Implementation of the dump method.
this->cppfile_
<< function_header ("dump")
<< "void " << name << "::"
<< "dump (std::ostream & output) {"
<< base_probe << "::dump (output);";
if (!p.members ().empty ())
{
Stub_Dump_Variable_Generator var_gen (this->hfile_, this->cppfile_);
var_gen.parent_is_probe (true);
std::vector <OASIS_PDL_Complex_Type_Member *>::const_iterator
iter = p.members ().begin (), iter_end = p.members ().end ();
for (; iter != iter_end; ++ iter)
{
var_gen.name ((*iter)->name ());
// Call accept on the actual child type
(*iter)->type ()->accept (var_gen);
}
}
this->cppfile_
<< "}";
}
