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[Contiki series of papers 4] Contikimac RDC Protocol

Directory Directory Summary Introduced Contikimac 1 Contikimac Timing 2 packet detection and fast sleep 3 Phase Lock Transmission Realize Evaluation 1 Micro Benchmark 2 Network Power consumption Related work Summarize Reference documents SummaryTo reduce system power consumption, a low-power wireless device must shut down the radio as much as possible, but in order to receive communication messages

Bzoj 1857 Conveyor Belt (three-part set of three points)

'); returnflag?-res:res;}voidOut (inta) {if(a0) {Putchar ('-'); a=-A;} if(a>=Ten) Out (A/Ten); Putchar (A%Ten+'0');}Doubleax, Ay, BX, by, CX, CY, DX, DY, p, q, R;DoubleDisDoubleX1,DoubleY1,DoubleX2,Doubley2) { returnsqrt ((x2-x1) * (x2-x1) + (y2-y1) * (y2-y1));}DoubleCalDoubleXDoubley) { DoubleAns=dis (ax,ay,x,y)/p; DoubleLX=CX, Ly=cy, RX=DX, ry=dy; while(Dis (lx,ly,rx,ry) >EPS) { Doublep1x= (LX

Self-help Linux problem diagnosis tool strace

program or command execution. A simple example How to Use strace to track programs and view corresponding output? The following is an example. 1. Examples of Tracked programs //main.c#include #include #include int main( ){  int fd ;  int i = 0 ;  fd = open( “/tmp/foo”, O_RDONLY ) ;  if ( fd     i=5;  else    i=2;  return i;} The above program tries to open the/tmp/foo file in read-only mode, and then exits. Only the open system calls the function. Then we compile the program to generate an exe

Cocos2d-x/Android searchlight effects (spotlight)

void onDrawFrame(GL10 gl) { // TODO Auto-generated method stub gl.glClear(GL10.GL_COLOR_BUFFER_BIT); gl.glMatrixMode(GL10.GL_PROJECTION); gl.glLoadIdentity(); gl.glEnableClientState(GL10.GL_VERTEX_ARRAY); gl.glEnableClientState(GL10.GL_COLOR_ARRAY); for (int i = 0; i Spotlight. Java Package COM. gr. spotlight; import Java. NIO. bytebuffer; import Java. NIO. byteorder; import Java. NIO. floatbuffer; import Java. NIO. intbuffer; import javax. microedition. khronos. opengles. gl10; import

Python machine learning and practice--Introduction 3 (Logistic regression) __python

-train.csv ') # using Pandas Read_ CSV function, read the test set to the variable df_test df_test = pd.read_csv (' breast-cancer-test.csv ') # Select clump thickness and cell size as characteristics, Construct a positive and negative classification sample df_test_negative = df_test.loc[df_test[' Type '] = = 0][[' Clump Thickness ', ' Cell Size '] df_test_positive = d f_test.loc[df_test[' Type '] = = 1][[' Clump Thickness ', ' Cell Size '] # import NumPy Toolkit, rename to NP import NumPy as NP

Prediction of benign/malignant tumors Python code implementation

Import Pandas as PD Import Matplotlib.pyplot as Plt Import NumPy as NP From Sklearn.linear_model import logisticregression Df_train = Pd.read_csv (R ' E:\BaiduNetdiskDownload\Datasets\Breast-Cancer\breast-cancer-train.csv ') #利用pandas读入数据 Df_test =pd.read_csv (R ' E:\BaiduNetdiskDownload\Datasets\Breast-Cancer\breast-cancer-test.csv ') #选取ClumpThickness与cell size as a feature to construct positive and negative classified samples in test sets df_test_negative = df_test.loc[df_test[' Type

linux-sed command

Tags: include support for extended SED file content command using Lov insert1th SED Foundation 1.1 sed Option Stream Editor-R supports extended regular-N cancels the default output-I direct modification does not output to the desktop-i.bak BackupThe writing format of 1.2 sedSed ' conditional command 'Sed ' pattern command 'Sed ' mode command '1.3 sed command execution process1. Read the contents of the file 1th line2. Whether the conditions are met1). The command that satisfies the condition exe

Linux sed command (daily one learns)

1th SED Foundation 1.1 sed options-R supports extended regular-N cancels the default output-I direct modification does not output to the desktop-i.bak BackupThe writing format of 1.2 sedSed ' conditional command 'Sed ' pattern command 'Sed ' mode command '1.3 sed command execution process1. Read the contents of the file 1th line2. Whether the conditions are met1). The command that satisfies the condition executes the corresponding P s D2). Not satisfied continue to 1th step3. To the last line of

Implementation framework and Application of ethtool in Linux

data, the MAC protocol can determine whether data can be sent in advance. If data can be sent, it adds some control information to the data, and finally sends the data and control information to the physical layer in the specified format; when receiving data, the MAC protocol first checks the input information and determines whether a transmission error has occurred. If there is no error, the control information is removed and sent to the LLC layer. Ethernet MAC is defined by IEEE-802.3 Etherne

ASP Improved version MD5, SHA256 multiple encryption Class (two times and many times) _ Application Skills

, ishiftbits) or Rshift (LValue, (32-ishiftbits)) End Function ' Append unsigned 16-encoded Private Function addunsigned (byVal LX, ByVal LY) Dim lX4 Dim lY4 Dim lX8 Dim lY8 Dim Lresult LX8 = LX and amp;h80000000 LY8 = LY and amp;h80000000 LX4 = LX and amp;h40000000 LY4 = LY and amp;h40000000 LRESULT = (LX

Python Machine Learning-the prediction of benign/malignant tumors __python

(df_test_negative[' Clump Thickness ') ], df_test_negative[' Cell Size '], marker= ' o ', s=200, c= ' Red ') # Draw malignancy sample points, labeled Black Plt.scatter (df_test_positive[' Cl UMP Thickness '], df_test_positive[' Cell Size ', marker= ' x ', s=150, c= ' black ') # A description of the x,y axis is drawn plt.xlabel (' clump thick Ness ') Plt.ylabel (' Cell Size ') # show Plt.show () #Paint # Print () #导入numpy Toolkit and named NP import NumPy as NP #利用numpy的random函数随机采样直线的截距和系数

HDU 4024 Dwarven sniper's hunting (Ry-others, search-binary)

Dwarven sniper wants to know the maximum length that the silver bullet can fly, and the shortest time that the hunting lasts. specifically, the total hunting time is defined as the time interval from the start of hunting to the moment that the bullet hit lycanthrope. can you help him? Inputthere are several test cases. each of them contains only one line which consist of 9 real numbers, that are x1, Y1, X2, Y2, lx, Ly, Vd, VB and L (-10000 The pair

Common Linux basic commands

. bat 6. The file RENAME Command mV (REN or rename in DOS) is used in Linux to rename the file. For example: MV/mnt \ floppy P is equivalent to Ren \ MNT \ floppy P Note: In addition to renaming a file, the MV command in Linux also provides the file movement function. See the example below: MV/mnt/floppy/bin is equivalent to the DOS command move \ MNT \ floppy \ bin 7. file copy command CP (copy in DOS) Use the CP command in Linux to copy files, for example: CP/UCDOS/*/Fox is equivalent to copy

Kprobe kernel Modules

The code comes from the Linux kernel Sample/kprobeKprobe_example.c/** Note:this example is works on x86 and PowerPC.* Here's a sample kernel module showing the use of kprobes to dump a* Stack trace and selected registers when Do_fork () is called.** For more information on theory of operation of Kprobes, see* Documentation/kprobes.txt** You'll see the trace data in/var/log/messages and on the console* Whenever Do_fork () is invoked to create a new process.*/#include #include #include /* For each

"Turn" support and implementation of Linux network card driver for Ethtool

whether the data can be sent, if it can be sent to the data with some control information, and finally the data and control information in the specified format sent to the physical layer, when the data is received, the MAC protocol first to determine the information entered and whether transmission error occurred, If there is no error, the control information is removed and sent to the LLC layer. Ethernet MAC is defined by the IEEE-802.3 Ethernet standard.The physical layer PHY is a physical in

Internet Bar Fiber Access scheme

situation of Internet cafes users, the main link is worth the Internet Café users reference, we recommend the first way. The first is the use of optical fiber transceiver to achieve the connection between the fiber and the dual-Wan port router, this way the biggest feature is the low input cost, but also the most suitable for Internet users a way. In the choice of fiber transceiver, the performance is of

Integer of the generation time of common functions commonly used in ASP

' Function name: Getmytimenumber () ' function: An integer that generates time ' parameter: LX----type of time integer ' Lx=0 to the minute lx=1 to the hour lx=2 to the day lx=3 to the month ' Return value: The integer value of the build time (min to minute) Example '*

Integer of the generation time of common functions commonly used in ASP

' Function name: Getmytimenumber () ' function: An integer that generates time ' parameter: LX----type of time integer ' Lx=0 to the minute lx=1 to the hour lx=2 to the day lx=3 to the month ' Return value: The integer value of the build time (min to minute) Example '*

Network School: efficient Internet access starts from the correct connection

wire breaker instead, after all, no-blade wire breaker generally uses a hexagonal design, which can effectively prevent minor cables from being damaged when it is used for wire stripping. On the contrary, when using a blade wire breaker to create a network cable, the sharp blade will cut the skin of the cable accidentally, which brings a fault risk to the efficient communication of the network in the future. Optical module, reasonable connectionThe so-called optical terminal module is the conne

Various router interfaces and Connection Methods

Port The AuI port is the interface used to connect to the coarse coaxial cable. It is a "d" Type 15-pin interface, this is one of the most common ports in the ring or bus network. The router can connect to the 10base-5 network through a coarse coaxial cable transceiver. But more is the use of external transceiver (AUI-to-RJ-45), to achieve the connection with the 10base-t Ethernet. Of course, you can also

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