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Schifra
Reed-Solomon Error Correcting Code Library
http://www.schifra.com
Copyright (c) 2000-2007 Arash Partow, All Rights Reserved.
The Schifra Reed-Solomon Error Correcting Code Library and all
its components are supplied under the terms of the General Schifra
License agreement. The contents of the Schifra Reed-Solomon Error
Correcting Code Library and its components may not be copied or
disclosed except in accordance with the terms of that agreement.
URL: http://www.schifra.com/license.html
Parties wanting to use the Schifra Reed-Solomon Error Correcting Code
Library and its components within an open source, academic or other
noncommercial or not-for-profit environment may do so under the
guidelines and in complete accordance with the below attached
General Public License (version 2). Under the described terms of
"free" use for open source and noncommercial purposes of the Schifra
標(biāo)簽：
Reed-Solomon
Correcting
Copyright
Schifra
上傳時(shí)間：
2014-01-04
上傳用戶：ljmwh2000
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FIBPlus is a component suite intended for work with InterBase. It is direct, fast and flexible InterBase connectivity for Delphi, C++ Builder, Ada and Kylix. FIBPlus supports Delphi 5-7, Delphi 2005, Delphi 2006, Delphi 2007, C++ Builder 5-6, C++ Builder 2006, C++ Builder 2007, Kylix 3, gnat-3.15p, gnat2006 GPL, and all versions of InterBase 4.x-7.x, InterBase 2007 and Firebird 1.x-2.x.
Using FIBPlus in your applications you do not need to install any additional software except for InterBase Client Software. FIBPlus supports all special InterBase features such as array-fields, event alerters, BLOB-fields, etc.
FIBPlus is a native component set and its evaluation versions are distributed partially in sources.
Registering FIBPlus you get full sources of components and technical support
標(biāo)簽：
component
InterBase
intended
flexible
上傳時(shí)間：
2013-12-01
上傳用戶：xuan‘nian
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mysql 5.1的 jdbc驅(qū)動(dòng)
Connector/J 5.1 支持Mysql 4.1、Mysql 5.0、Mysql 5.1、Mysql 6.0 alpha這些版本。
Connector/J 5.0 支持MySQL 4.1、MySQL 5.0 servers、distributed transaction (XA)。
Connector/J 3.1 支持MySQL 4.1、MySQL 5.0 servers、MySQL 5.0 except distributed transaction (XA) support。
Connector/J 3.0 支持MySQL 3.x or MySQL 4.1。
標(biāo)簽：
Mysql
Connector
5.1
mysql
上傳時(shí)間：
2014-01-03
上傳用戶：GHF
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字符串轉(zhuǎn)換為各種類型，很多人用Try except去做，這樣不但調(diào)試不方便，也是不經(jīng)濟(jì)的，試下這段代碼。
標(biāo)簽：
字符串
轉(zhuǎn)換
上傳時(shí)間：
2013-12-31
上傳用戶：561596
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Information in this document is provided in connection with Intel products. No license, express or implied, by estoppels or otherwise, to any intellectual property rights is granted by this document. except as provided in Intel’s Terms and Conditions of Sale for such products, Intel assumes no liability whatsoever, and Intel disclaims any express or implied warranty, relating to sale and/or use of Intel products including liability or warranties relating to fitness for a particular purpose, merchantability, or infringement of any patent, copyright or other intellectual property right. Intel products are not intended for use in medical, life saving, or life sustaining applications. ALL INFORMATION CONTAINED IN THIS DOCUMENT IS PROVIDED “AS IS.”
Intel may make changes to specifications and product descriptions at any time, without notice.
“WiMAX,” “Mobile WiMAX,” “WiMAX Forum,” “WiMAX Forum Certified” and the WiMAX Forum and WiMAX Forum Certified logo are trademarks of the WiMAX
標(biāo)簽：
Information
connection
document
provided
上傳時(shí)間：
2017-08-25
上傳用戶：songyue1991
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AEC-Q100 qualified
? 12 V and 24 V battery systems compliance
? 3.3 V and 5 V logic compatible I/O
? 8-channel configurable MOSFET pre-driver
– High-side (N-channel and P-channel MOS)
– Low-side (N-channel MOS)
– H-bridge (up to 2 H-bridge)
– Peak & Hold (2 loads)
? Operating battery supply voltage 3.8 V to 36 V
? Operating VDD supply voltage 4.5 V to 5.5 V
? All device pins, except the ground pins, withstand at least 40 V
? Programmable gate charge/discharge currents for improving EMI behavior
標(biāo)簽：
configurable
Automotive
pre-driver
suitable
channel
systems
MOSFET
fully
High
side
上傳時(shí)間：
2019-03-27
上傳用戶：guaixiaolong
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以后再也不用擔(dān)心寫爬蟲(chóng)ip被封，不用擔(dān)心沒(méi)錢買代理ip的煩惱了
在使用python寫爬蟲(chóng)時(shí)候，你會(huì)遇到所要爬取的網(wǎng)站有反爬取技術(shù)比如用同一個(gè)IP反復(fù)爬取同一個(gè)網(wǎng)頁(yè)，很可能會(huì)被封。如何有效的解決這個(gè)問(wèn)題呢？我們可以使用代理ip，來(lái)設(shè)置代理ip池。
現(xiàn)在教大家一個(gè)可獲取大量免費(fèi)有效快速的代理ip方法，我們?cè)L問(wèn)西刺免費(fèi)代理ip網(wǎng)址
這里面提供了許多代理ip，但是我們嘗試過(guò)后會(huì)發(fā)現(xiàn)并不是每一個(gè)都是有效的。所以我們現(xiàn)在所要做的就是從里面提供的篩選出有效快速穩(wěn)定的ip。
以下介紹的免費(fèi)獲取代理ip池的方法：
優(yōu)點(diǎn)：免費(fèi)、數(shù)量多、有效、速度快
缺點(diǎn)：需要定期篩選
主要思路：
從網(wǎng)址上爬取ip地址并存儲(chǔ)
驗(yàn)證ip是否能使用-（隨機(jī)訪問(wèn)網(wǎng)址判斷響應(yīng)碼）
格式化ip地址
代碼如下：
1.導(dǎo)入包
import requests
from lxml import etree
import time
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2.獲取西刺免費(fèi)代理ip網(wǎng)址上的代理ip
def get_all_proxy():
url = 'http://www.xicidaili.com/nn/1'
headers = {
'User-Agent': 'Mozilla/5.0 (Windows NT 6.1; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/68.0.3440.106 Safari/537.36',
}
response = requests.get(url, headers=headers)
html_ele = etree.HTML(response.text)
ip_eles = html_ele.xpath('//table[@id="ip_list"]/tr/td[2]/text()')
port_ele = html_ele.xpath('//table[@id="ip_list"]/tr/td[3]/text()')
proxy_list = []
for i in range(0,len(ip_eles)):
proxy_str = 'http://' + ip_eles[i] + ':' + port_ele[i]
proxy_list.append(proxy_str)
return proxy_list
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3.驗(yàn)證獲取的ip
def check_all_proxy(proxy_list):
valid_proxy_list = []
for proxy in proxy_list:
url = 'http://www.baidu.com/'
proxy_dict = {
'http': proxy
}
try:
start_time = time.time()
response = requests.get(url, proxies=proxy_dict, timeout=5)
if response.status_code == 200:
end_time = time.time()
print('代理可用：' + proxy)
print('耗時(shí):' + str(end_time - start_time))
valid_proxy_list.append(proxy)
else:
print('代理超時(shí)')
except:
print('代理不可用--------------->'+proxy)
return valid_proxy_list
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4.輸出獲取ip池
if __name__ == '__main__':
proxy_list = get_all_proxy()
valid_proxy_list = check_all_proxy(proxy_list)
print('--'*30)
print(valid_proxy_list)
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技術(shù)能力有限歡迎提出意見(jiàn)，保證積極向上不斷學(xué)習(xí)
————————————————
版權(quán)聲明：本文為CSDN博主「彬小二」的原創(chuàng)文章，遵循 CC 4.0 BY-SA 版權(quán)協(xié)議，轉(zhuǎn)載請(qǐng)附上原文出處鏈接及本聲明。
原文鏈接：https://blog.csdn.net/qq_39884947/article/details/86609930
標(biāo)簽：
python
ip
代理
防止
上傳時(shí)間：
2019-11-15
上傳用戶：fygwz1982
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Wireless means different things to different people. For this book, it refers
to the radio systems that provide point-to-point, point-to-multipoint, and
Earth-space communications over transmission links that propagate outside
buildings through the lower atmosphere. Wireless systems are being built
that provide data transmission between computers and other devices on
one’s own desk. These are part of the wireless world but not the part where,
except for interference perhaps, the atmosphere has any influence. The intent
of this book is to provide a description of the physical phenomena that can
affect propagation through the atmosphere, present sample measurements
and statistics, and provide models that system designers can use to calculate
their link budgets and estimate the limitations the atmosphere may place on
their design.
標(biāo)簽：
Communication
Propagation
Handbook
Wireless
for
上傳時(shí)間：
2020-05-31
上傳用戶：shancjb
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A wireless communication network can be viewed as a collection of nodes, located in some domain, which
can in turn be transmitters or receivers (depending on the network considered, nodes may be mobile users,
base stations in a cellular network, access points of a WiFi mesh etc.). At a given time, several nodes
transmit simultaneously, each toward its own receiver. Each transmitter–receiver pair requires its own
wireless link. The signal received from the link transmitter may be jammed by the signals received from
the other transmitters. Even in the simplest model where the signal power radiated from a point decays in
an isotropic way with Euclidean distance, the geometry of the locations of the nodes plays a key role since
it determines the signal to interference and noise ratio (SINR) at each receiver and hence the possibility of
establishing simultaneously this collection of links at a given bit rate. The interference seen by a receiver is
the sum of the signal powers received from all transmitters, except its own transmitter.
標(biāo)簽：
Stochastic
Geometry
Networks
Wireless
Volume
and
II
上傳時(shí)間：
2020-06-01
上傳用戶：shancjb
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Spartane-6 LXand LXT FPGAs are available in various speed grades, with -3 having the highest performance. The DC and AC electrical parameters of the Automotive XA Spartan-6 FPGAs and Defense-grade Spartan-6Q FPGAs devices are equivalent to the commercial specifications except where noted. The timing characteristics of the commercial(XC)-2 speed grade industrial device are the same as for a-2 speed grade commercial device. The -2Q and -3Q speed grades are exclusively for the expanded(Q) temperature range. The timing characteristics are equivalent to those shown for the-2 and-3speed grades for the Automotive and Defense-grade devices.Spartan-6 FPGA DC and AC characteristics are specified for commercial (C), industrial (), and expanded (Q) temperature ranges. Only selected speed grades and/or devices might be available in the industrial or expanded temperature ranges for Automotive and Defense-grade devices.
標(biāo)簽：
spartan-6
fpga
上傳時(shí)間：
2022-06-19
上傳用戶：
