Git:https://github.com/linyi0604/machinelearningRegularization: Improve the generalization ability of the model on unknown data Avoid parameter overfittingRegularization commonly used methods: Increase the penalty for a parameter on the target function Reduce the impact of a certain parameter on the resultL1 regularization: Lasso The L1 norm Vector penalty is added after the objective function of the linear regression. X is the sample feature of the input W is th
this validation data is. It is actually used to avoid fitting, and in the course of training, we usually use it to determine some of the parameters (for example, according to the accuracy on validation data to determine the epoch size of the early stopping, according to validation Data determines learning rate, etc.). So why not do this directly on testing data. Because if you do this in testing data, then as the training progresses, our network is actually overfitting our testing data at 1.1 p
L1 and L2 regularization items, also called penalty items, are designed to limit the parameters of the model and prevent the model from going over you and adding an entry after the loss function.
L1 is the sum of the absolute values of each parameter of the model
L2 is the square sum of each parameter of the model.
Difference:
L1 tend to produce a small number of features, while o
Layer 2 switching The development of L2 Switch Technology is relatively mature. L2 Switch is a data link layer device that can identify the MAC address information in the data packet and forward it according to the MAC address, the MAC addresses and corresponding ports are recorded in an internal address table. The specific workflow is as follows: (1) When the switch receives a packet from a port, it fir
Leads
The regularization item can take a different form. For example, in the regression problem, the loss function is the square loss, and the regularization term can be the L2 norm of the parameter vector:
Here, the L2 norm of the parameter vector w is represented.
A regularization term can also be a L1 norm of a parameter vector:
This represents the L1 norm of the parameter vector W. Definitions of
Layer-3 Ethernet switch: introduces L2 VLAN forwarding, configurations in layer-3 Ethernet switches, MAC addresses, and L2 VLAN forwarding, I hope you will have a clear understanding after reading the following articles. The forwarding mechanism of a layer-3 Ethernet switch is divided into two parts: layer-2 forwarding and layer-3 switching. First, let's talk about the second-layer forwarding process.
MAC a
L2 switches are still commonly used, so I studied what problems will occur in our lan when the performance of the switches decreases. Here I will share with you, I hope it will be useful to you. One of the following network faults in this article is the failure to withstand the LAN broadcast storm due to poor switch performance, and the cache overflow error, which eventually leads to the failure of the LAN to access the Internet! Considering that the
L1, L2 paradigm and sparse constraintsSuppose that the objective function to be solved is:E (x) = f (x) + R (x)where f (x) is a loss function, used to evaluate the model training loss, it must be arbitrary convex function, R (x) is a normalized constraint factor, used to limit the model, according to the probability distribution of the model parameters, R (x) is generally: L1 paradigm constraints (model obeys Gaussian distribution),
GE switches are still commonly used. So I have studied the full performance solution of the mainstream L2 switches with all-optical ports. I would like to share this with you and hope it will be useful to you. Recently, the F-engine S2200F series all-optical ports, 10-Gigabit L2 switches and F-engine S2200G series all-optical ports, which are independently developed by beacon network, were officially introd
What is a layer-2 switch? The operating skills and operating methods of L2 switches are found on some technical forums and blogs for your reference only.
In order to adapt to the challenges brought by the deepening of network applications, the scale and speed of the network are rapidly developing. The speed of the LAN has increased from 10 Mbit/s to 100 Mbit/s, at present, the Gigabit Ethernet technology has been widely used. In terms of network struc
With the development of China's routing industry, it also promotes the update and upgrade of router technology. Here we mainly explain the basic knowledge of router technology and L2 Switch. In order to adapt to the challenges brought by the deepening of network applications, the scale and speed of the network are rapidly developing. The speed of the LAN has increased from 10 Mbit/s to 100 Mbit/s, currently, Gigabit Ethernet technology is widely used.
Hub: previously dedicated to 10 m shared Ethernet, which is rarely used. It only works on the physical layer and uses half-duplex communication between the port and the host. Generally, no matter whether the physical connection is bus or star, its logical connections are bus-type. As long as one of the hosts sends information, the hub will copy the information to all other port hosts. The Hub is also called a multi-port repeater, all hosts connected to a hub share a conflict domain. The so-calle
Interface processing logic: Get weather forecast information, 1500 City weather: The first time the program processing, will first determine whether the Redis key exists, if there is, directly return the corresponding data; if there is no key, read the MySQL corresponding table data, cache the data to Redis, and return the data If the second time in the access to the same data, go directly redis get the corresponding data. Compare the MySQL and Redis processing performance of the business:
How to increase transaction volume per second (TPS)
Transaction volume per second-introduction to the terminology of performance testing
TPS (Transaction per Second)
The number of transactions or transactions that the system can handle per second. It is an important index to measure the ability of system processing. TPS is an important index of performance par
Tags: Running MySQL Status View monitor running MySQL, one way is to view MySQL running status. (1) QPS (query amount per second) QPS = Questions (or Queries)/seconds mysql > show global status Like ' question% '; (2) TPs (transaction volume per second) TPS = (Com_commit + com_rollback)/seconds mysql > show glob Al status like ' Com_commit '; mysql > show global status Like ' Com_rollback '; (3) key
Running MySQL Status View monitor running MySQL, one way is to view MySQL running status. (1) QPS (query amount per second) qps = Questions (or Queries)/secondsmysql > show global status Like ' question% '; (2) TPS (transaction volume per second) tps = (Com_commit + com_rollback)/Secondsmysql > show global S Tatus like ' Com_commit ', mysql > show global status Like ' Com_rollback '; (3) key Buffer hit ra
maintains its own address table.The working principle of a L2 Switch can be inferred from the following three points:(1) because the switch exchanges data on most ports at the same time, it requires a wide switching bus bandwidth. If the L2 Switch has N ports, the bandwidth of each port is M, if the bandwidth of the vswitch bus exceeds n × m, the vswitch can achieve line rate switching;(2) the MAC address
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