Well, not earlier. That's it.

作者通过分享自己的经历和观察,深入探讨了如何用个人的心灵去理解世界,强调了诚实思考、真实行动的价值,并在面对复杂问题时保持理性与谨慎。文章还提到了学习与实践的重要性,鼓励读者通过实际操作来加深对事物的理解。

other article talked about the opinions of his Mbt sneakers, house prices fall in the range 30%, 40%. Just can't predict need duration.

 

Heel stick of discussion of the exchange rate in there two friends don't have to argue. Didn't DuoDa significance. Stood in their mountain scenery. The problem is too big to our financial significance, much less. We just look at the policy, this year the possibility of appreciation on the DuoDa? There didn't seem to be.

 

Well, not earlier. That's it.

 

Today KanTie busy. Go home at night glanced over the everyone's return card. But as "absolute original heart" the friend put it, not really....... The friends' is amazing, I just made a house, the story of his iron can guess what I would do. In fact, this story after work with a lot of people I mentioned, I have always wanted to know the answer to this story. In fact, read the world too clear may not be a good thing, remember the movie, by individual to glasses, too short sighted glasses degree, the result that matchs shallow glasses master replied watch too clear, be careful dizzy. Deep ah. Sometimes think oneself or HunHunDunDun. This strange animals, when don't understand what all want to know, know just hope what all don't know. After the graduation see too many things. One was, helplessly looking at story from 2245 points to 1300 points, in fall outside "normal adjustment" and "reverse", "" the voice of policy soles, only to see people friends, decimated by a fall of large, there is no lack of skill and bravery. Sorry!!!!!I also failed to escape by luck, but I can prompt summary, and finally in the end of 2003, the losses all repair back. Summarizing the experience, thinking about past, and the true for yourself childish feel sad. From then on, I see the world with their own heart, and strongly to be deaf, blind. Now, the stock market to the MBT Sini, the true in sight and repeat. I am determined to want to serve as a lu xun, although my voice is so weak.

 

Really envy xie, he can think of honestly out, doing a honest man, and there are certain influence, can send a more powerful voice. And I was only in the BBS, hide, secretly to say a few words of truth, also dare not say more, afraid that wrong, lead evil injury body. Last week, will have a friend called me, according to the article recognized me. I can only be doubly careful.

 

But, in order to wake up the house more than a friend, I have to sound a bit bigger. And, I repeat, I want to let everyone know is to know the world and methodology, and the objective law of methodology. For example, someone in the street, am I to go to debunk the con trick, that trick that is really too much, I could not be a one to expose, I can only to those passers-by to penetrate the most basic skills of deception. This is my body.

 

I also remember that let MBT Wave White to learn some of Marx's philosophy and history? That is the understanding of the law some basic methods. That is too boring to many friends, and I'll give some examples to try to put those things vividly describe clearly.

 

  

转载于:https://www.cnblogs.com/usmbtonline/archive/2011/08/18/2144840.html

Your feedback is requested on changes under consideration for SLF4J version 2.1.0. SLF4J warning or error messages and their meanings No SLF4J providers were found. This message is a warning and not an error. It is reported when no SLF4J providers could be found on the class path. SLF4J requires a logging provider because it is a logging API and not an logging implementation. Placing one (and only one) of the many available providers such as slf4j-nop.jar slf4j-simple.jar, slf4j-reload4j.jar, slf4j-jdk14.jar or logback-classic.jar on the class path will solve the problem. In the absence of a provider, SLF4J will default to a no-operation (NOP) logger provider. Please note that slf4j-api version 2.0.x and later use the ServiceLoader mechanism. Earlier versions relied on the static binder mechanism which is no longer honored by slf4j-api. Please read the FAQ entry What has changed in SLF4J version 2.0.0? for further important details. If you are responsible for packaging an application and do not care about logging, then placing slf4j-nop.jar on the class path of your application will get rid of this warning message. Note that embedded components such as libraries or frameworks should not declare a dependency on any SLF4J providers but only depend on slf4j-api. When a library declares a compile-time dependency on a SLF4J provider, it imposes that provider on the end-user, thus negating SLF4J's purpose. Class path contains SLF4J bindings targeting slf4j-api versions 1.7.x or earlier Planning for the advent of Jigsaw (Java 9), slf4j-api version 2.0.x and later use the ServiceLoader mechanism. Earlier versions of SLF4J relied on the static binder mechanism which is no longer honored by slf4j-api version 2.0.x. In case SLF4J 2.x finds no providers targeting SLF4J 2.x but finds instead bindings targeting SLF4J 1.7 or earlier, it will list the bindings it finds but otherwise will ignore them. This can be solved by placing an SLF4J provider on your classpath, such providers include logback version 1.3.x and later, as well as one of slf4j-reload4j, slf4j-jdk14, slf4j-simple version 2.0.0 or later. See also the FAQ entry What has changed in SLF4J version 2.0.0? for further important details. IllegalStateException: org.slf4j.LoggerFactory in failed state. Original exception was thrown EARLIER. This IllegalStateException is thrown post-initialization and informs the user that initialization of LoggerFactory has failed. Note It is important to realize that the exception causing the failure was thrown at an earlier stage. This earlier exception should provide more valuable information about the root cause of the problem. The method o.a.commons.logging.impl.SLF4FLogFactory#release was invoked. Given the structure of the commons-logging API, in particular as implemented by SLF4J, the o.a.commons.logging.impl.SLF4FLogFactory#release() method should never be called. However, depending on the deployment of commons-logging.jar files in your servlet container, release() method may be unexpectedly invoked by a copy of org.apache.commons.logging.LogFactory class shipping with commons-logging.jar. This is a relatively common occurrence with recent versions of Tomcat, especially if you place jcl-over-slf4j.jar in WEB-INF/lib directory of your web-application instead of $TOMCAT_HOME/common/lib, where $TOMCAT_HOME stands for the directory where Tomcat is installed. In order to fully benefit from the stability offered by jcl-over-slf4j.jar, we recommend that you place jcl-over-slf4j.jar in $TOMCAT_HOME/common/lib without placing a copy in your web-applications. Please also see bug #22. Operation [suchAndSuch] is not supported in jcl-over-slf4j. An UnsupportedOperationException is thrown whenever one of the protected methods introduced in JCL 1.1 are invoked. These methods are invoked by LogFactory implementations shipping with commons-logging.jar. However, the LogFactory implemented by jcl-over-slf4j.jar, namely SLF4FLogFactory, does not call any of these methods. If you observe this problem, then it is highly probable that you have a copy of commons-logging.jar in your class path overriding the classes shipping with jcl-over-slf4j.jar. Note that this issue is very similar in nature to the warning issued when the "o.a.commons.logging.impl.SLF4FLogFactory.release()" method is invoked, discussed in the previous item. Detected logger name mismatch Logger name mismatch warnings are printed only if the slf4j.detectLoggerNameMismatch system property is set to true. By default, this property is not set and no warnings will be printed even in case of a logger name mismatch. since 1.7.9 The warning will be printed in case the name of the logger specified via a class passed as an argument to the LoggerFactory.getLogger(Class) method differs from the name of the caller as computed internally by SLF4J. For example, the following code snippet package com.acme; import com.foo.Kangaroo; class Fruit { Logger logger = LoggerFactory.getLogger(Kangaroo.class); } will result in the warning SLF4J: Detected logger name mismatch. Given name: "com.foo.Kangaroo"; computed name: "com.acme.Fruit". but only if slf4j.detectLoggerNameMismatch system property is set to true. No warning will be issued for the special case where the class in which the logger is defined is a super-type of the class parameter passed as argument. For example, class A { Logger logger = LoggerFactory.getLogger(getClass()); } class B extends A { // no mismatch warning will be issued when B is instantiated // given that class A is a super-type of class B } If you come across a mismatch warning which cannot be explained, then you might have spotted a white elephant, that is a very rare occurrence where SLF4J cannot correctly compute the name of the class where a logger is defined. We are very interested to learn about such cases. If and when you spot an inexplicable mismatch, please do file a bug report with us. Failed to load class org.slf4j.impl.StaticLoggerBinder This warning message is reported by slf4j-api version 1.7.x and earlier when the org.slf4j.impl.StaticLoggerBinder class could not be loaded into memory. This happens when no appropriate SLF4J binding could be found on the class path. Placing one (and only one) of slf4j-nop.jar slf4j-simple.jar, slf4j-log4j12.jar, slf4j-jdk14.jar or logback-classic.jar on the class path should solve the problem. If you are seeing this message, then you are NOT using slf4j-api version 2.0 or later but slf4j-api version 1.7.x or earlier. Slf4j-api versions 2.0.x and later use the ServiceLoader mechanism. Backends such as logback 1.3 and later which target slf4j-api 2.x, do not ship with org.slf4j.impl.StaticLoggerBinder. If you place a logging backend which targets slf4j-api 2.0.x, you need slf4j-api-2.x.jar on the classpath. See also relevant faq entry. since 1.6.0 As of SLF4J version 1.6, in the absence of a binding, SLF4J will default to a no-operation (NOP) logger implementation. If you are responsible for packaging an application and do not care about logging, then placing slf4j-nop.jar on the class path of your application will get rid of this warning message. Note that embedded components such as libraries or frameworks should not declare a dependency on any SLF4J binding (or provider) but only depend on slf4j-api. When a library declares a compile-time dependency on a SLF4J binding (or provider), it imposes that binding (or provider) on the end-user, thus negating SLF4J's purpose. Multiple bindings were found on the class path SLF4J API is designed to bind with one and only one underlying logging framework at a time. If more than one binding is present on the class path, SLF4J will emit a warning, listing the location of those bindings. When multiple bindings are available on the class path, select one and only one binding you wish to use, and remove the other bindings. For example, if you have both slf4j-simple-2.0.17.jar and slf4j-nop-2.0.17.jar on the class path and you wish to use the nop (no-operation) binding, then remove slf4j-simple-2.0.17.jar from the class path. The list of locations that SLF4J provides in this warning usually provides sufficient information to identify the dependency transitively pulling in an unwanted SLF4J binding into your project. In your project's pom.xml file, exclude this SLF4J binding when declaring the unscrupulous dependency. For example, cassandra-all version 0.8.1 declares both log4j and slf4j-log4j12 as compile-time dependencies. Thus, when you include cassandra-all as a dependency in your project, the cassandra-all declaration will cause both slf4j-log4j12.jar and log4j.jar to be pulled in as dependencies. In case you do not wish to use log4j as the SLF4J backend, you can instruct Maven to exclude these two artifacts as shown next: <dependencies> <dependency> <groupId> org.apache.cassandra</groupId> <artifactId>cassandra-all</artifactId> <version>0.8.1</version> <exclusions> <exclusion> <groupId>org.slf4j</groupId> <artifactId>slf4j-log4j12</artifactId> </exclusion> <exclusion> <groupId>log4j</groupId> <artifactId>log4j</artifactId> </exclusion> </exclusions> </dependency> </dependencies> Note The warning emitted by SLF4J is just that, a warning. Even when multiple bindings are present, SLF4J will pick one logging framework/implementation and bind with it. The way SLF4J picks a binding is determined by the JVM and for all practical purposes should be considered random. As of version 1.6.6, SLF4J will name the framework/implementation class it is actually bound to. Embedded components such as libraries or frameworks should not declare a dependency on any SLF4J binding but only depend on slf4j-api. When a library declares a compile-time dependency on a SLF4J binding, it imposes that binding on the end-user, thus negating SLF4J's purpose. When you come across an embedded component declaring a compile-time dependency on any SLF4J binding, please take the time to contact the authors of said component/library and kindly ask them to mend their ways. slf4j-api version does not match that of the binding An SLF4J binding designates an artifact such as slf4j-jdk14.jar or slf4j-log4j12.jar used to bind slf4j to an underlying logging framework, say, java.util.logging and respectively log4j. Mixing different versions of slf4j-api.jar and SLF4J binding (a.k.a. provider since 2.0.0) can cause problems. For example, if you are using slf4j-api-2.0.17.jar, then you should also use slf4j-simple-2.0.17.jar, using slf4j-simple-1.5.5.jar will not work. Note From the client's perspective all versions of slf4j-api are compatible. Client code compiled with slf4j-api-N.jar will run perfectly fine with slf4j-api-M.jar for any N and M. You only need to ensure that the version of your binding matches that of the slf4j-api.jar. You do not have to worry about the version of slf4j-api.jar used by a given dependency in your project. You can always use any version of slf4j-api.jar, and as long as the version of slf4j-api.jar and its binding match, you should be fine. At initialization time, if SLF4J suspects that there may be an api vs. binding version mismatch problem, it will emit a warning about the suspected mismatch. Logging factory implementation cannot be null This error is reported when the LoggerFactory class could not find an appropriate binding. Placing one (and only one) of slf4j-nop.jar, slf4j-simple.jar, slf4j-log4j12.jar, slf4j-jdk14.jar or logback-classic.jar on the class path should prove to be an effective remedy. Detected both log4j-over-slf4j.jar AND slf4j-reload4j on the class path, preempting StackOverflowError. The purpose of slf4j-reload4j module is to delegate or redirect calls made to an SLF4J logger to log4j/reload4j. The purpose of the log4j-over-slf4j module is to redirect calls made to a log4j logger to SLF4J. If SLF4J is bound withslf4j-reload4j.jar and log4j-over-slf4j.jar is also present on the class path, a StackOverflowError will inevitably occur immediately after the first invocation of an SLF4J or a log4j logger. Here is how the exception might look like: Exception in thread "main" java.lang.StackOverflowError at java.util.Hashtable.containsKey(Hashtable.java:306) at org.apache.log4j.Log4jLoggerFactory.getLogger(Log4jLoggerFactory.java:36) at org.apache.log4j.LogManager.getLogger(LogManager.java:39) at org.slf4j.impl.Log4jLoggerFactory.getLogger(Log4jLoggerFactory.java:73) at org.slf4j.LoggerFactory.getLogger(LoggerFactory.java:249) at org.apache.log4j.Category.<init>(Category.java:53) at org.apache.log4j.Logger..<init>(Logger.java:35) at org.apache.log4j.Log4jLoggerFactory.getLogger(Log4jLoggerFactory.java:39) at org.apache.log4j.LogManager.getLogger(LogManager.java:39) at org.slf4j.impl.Log4jLoggerFactory.getLogger(Log4jLoggerFactory.java:73) at org.slf4j.LoggerFactory.getLogger(LoggerFactory.java:249) at org.apache.log4j.Category..<init>(Category.java:53) at org.apache.log4j.Logger..<init>(Logger.java:35) at org.apache.log4j.Log4jLoggerFactory.getLogger(Log4jLoggerFactory.java:39) at org.apache.log4j.LogManager.getLogger(LogManager.java:39) subsequent lines omitted... Since 1.5.11 SLF4J software preempts the inevitable stack overflow error by throwing an exception with details about the actual cause of the problem. This is deemed to be better than leaving the user wondering about the reasons of the StackOverflowError. Note that since reload4j provides the log4j 1.x API, reload4j.jar and log4j-over-slf4j.jar cannot be present simultaneously on your classpath. For more background on this topic see Bridging legacy APIs. Detected both jcl-over-slf4j.jar AND slf4j-jcl.jar on the class path, preempting StackOverflowError. The purpose of slf4j-jcl module is to delegate or redirect calls made to an SLF4J logger to jakarta commons logging (JCL). The purpose of the jcl-over-slf4j module is to redirect calls made to a JCL logger to SLF4J. If SLF4J is bound with slf4j-jcl.jar and jcl-over-slf4j.jar is also present on the class path, then a StackOverflowError will inevitably occur immediately after the first invocation of an SLF4J or a JCL logger. Here is how the exception might look like: Exception in thread "main" java.lang.StackOverflowError at java.lang.String.hashCode(String.java:1482) at java.util.HashMap.get(HashMap.java:300) at org.slf4j.impl.JCLLoggerFactory.getLogger(JCLLoggerFactory.java:67) at org.slf4j.LoggerFactory.getLogger(LoggerFactory.java:249) at org.apache.commons.logging.impl.SLF4JLogFactory.getInstance(SLF4JLogFactory.java:155) at org.apache.commons.logging.LogFactory.getLog(LogFactory.java:289) at org.slf4j.impl.JCLLoggerFactory.getLogger(JCLLoggerFactory.java:69) at org.slf4j.LoggerFactory.getLogger(LoggerFactory.java:249) at org.apache.commons.logging.impl.SLF4JLogFactory.getInstance(SLF4JLogFactory.java:155) subsequent lines omitted... Since 1.5.11 SLF4J software preempts the inevitable stack overflow error by throwing an exception with details about the actual cause of the problem. This is deemed to be better than leaving the user wondering about the reasons of the StackOverflowError. For more background on this topic see Bridging legacy APIs. Exception in thread "main" java.lang.NoSuchFieldError: tlm Exception in thread "main" java.lang.NoSuchFieldError: tlm at org.apache.log4j.MDCFriend.fixForJava9(MDCFriend.java:11) at org.slf4j.impl.Log4jMDCAdapter.(Log4jMDCAdapter.java:38) at Main.main(Main.java:5) The NoSuchFieldError is thrown when slf4j-log4j12 attempts to access the 'tlm' package private field in org.apache.log4j.MDC which was specified as being of type java.lang.Object in log4j 1.2.x but was changed to java.lang.ThreadLocal in reload4j. Moreover, such access to package private fields from different modules is not authorized by default in modularized applications in Java 9 and later. To keep a long story short, the NoSuchFieldError can be avoided by using slf4j-reload4j.jar with reload4j.jar. Stated differently, org.slf4j.MDC cannot be used with the slf4j-log4j12.jar and reload4j.jar combination. Update: The issue described above was fixed in reload4j 1.2.21. Although it is still recommended that you use slf4j-reload4j as the preferred adapter for the slf4j/reload4j combination, with reload4j version 1.2.21 and later you can freely mix any version of slf4j-log4j12, if you need to. Failed to load class "org.slf4j.impl.StaticMDCBinder" This error indicates that appropriate SLF4J binding could not be found on the class path. Placing one (and only one) of slf4j-nop.jar, slf4j-simple.jar, slf4j-log4j12.jar, slf4j-jdk14.jar or logback-classic.jar on the class path should solve the problem. MDCAdapter cannot be null This error is reported when org.slf4j.MDC class has not been initialized correctly. Same cause and remedy as the previously listed item. A number (N) of logging calls during the initialization phase have been intercepted and are now being replayed. These are subject to the filtering rules of the underlying logging system. since 1.7.15 Logging calls made during the initialization phase are recorded and replayed post-initialization. Note that the replayed logging calls are subject to filtering by the underlying logging system. In principle, replaying only occurs for applications which are already multithreaded at the time the first logging call occurs. See also substitute loggers. Substitute loggers were created during the default configuration phase of the underlying logging system Highly configurable logging systems such as logback and log4j may create components which invoke loggers during their own initialization. See issue LOGBACK-127 for a typical occurrence. However, since the binding process with SLF4J has not yet completed (because the underlying logging system was not yet completely loaded into memory), it is not possible to honor such logger creation requests. To avoid this chicken-and-egg problem, SLF4J creates substitute loggers during this phase (initialization). Calls made to the substitute loggers during this phase are simply dropped. After the initialization completes, the substitute logger will delegate logging calls to the appropriate logger implementation and otherwise will function as any other logger returned by LoggerFactory. If any substitute logger had to be created, SLF4J will emit a listing of such loggers. This list is intended to let you know that any logging calls made to these loggers during initialization have been dropped. See also intercepted and replayed logging calls. SLF4J versions 1.4.0 and later requires log4j 1.2.12 or later The trace level was added to log4j in version 1.2.12 released on August 29, 2005. The trace level was added to the SLF4J API in version 1.4.0 on May 16th, 2007. Thus, starting with SLF4J 1.4.0, the log4j binding for SLF4J requires log4j version 1.2.12 or above. However, as reported in issue 59, in some environments it may be difficult to upgrade the log4j version. To accommodate such circumstances, SLF4J's Log4jLoggerAdapter will map the TRACE level as DEBUG. java.lang.NoClassDefFoundError: org/slf4j/event/LoggingEvent Logback-classic version 1.1.4 and later require slf4j-api version 1.7.15 or later. With an earlier slf4j-api.jar in the classpath, attempting introspection of a Logger instance returned by logback version 1.1.4 or later will result in a NoClassDefFoundError similar to that shown below. Exception in thread "main" java.lang.NoClassDefFoundError: org/slf4j/event/LoggingEvent at java.lang.Class.getDeclaredMethods0(Native Method) at java.lang.Class.privateGetDeclaredMethods(Class.java:2451) at java.lang.Class.privateGetPublicMethods(Class.java:2571) at java.lang.Class.getMethods(Class.java:1429) at java.beans.Introspector.getPublicDeclaredMethods(Introspector.java:1261) at java.beans.Introspector.getTargetMethodInfo(Introspector.java:1122) at java.beans.Introspector.getBeanInfo(Introspector.java:414) at java.beans.Introspector.getBeanInfo(Introspector.java:161) Placing slf4j-api.jar version 1.7.15 or later in the classpath should solve the issue. Note that this problem only occurs with logback version 1.1.4 and later, other bindings such as slf4j-log4j, slf4j-jdk14 and slf4j-simple are unaffected.
09-24
内容概要:本文介绍了一个基于多传感器融合的定位系统设计方案,采用GPS、里程计和电子罗盘作为定位传感器,利用扩展卡尔曼滤波(EKF)算法对多源传感器数据进行融合处理,最终输出目标的滤波后位置信息,并提供了完整的Matlab代码实现。该方法有效提升了定位精度与稳定性,尤其适用于存在单一传感器误差或信号丢失的复杂环境,如自动驾驶、移动采用GPS、里程计和电子罗盘作为定位传感器,EKF作为多传感器的融合算法,最终输出目标的滤波位置(Matlab代码实现)机器人导航等领域。文中详细阐述了各传感器的数据建模方式、状态转移与观测方程构建,以及EKF算法的具体实现步骤,具有较强的工程实践价值。; 适合人群:具备一定Matlab编程基础,熟悉传感器原理和滤波算法的高校研究生、科研人员及从事自动驾驶、机器人导航等相关领域的工程技术人员。; 使用场景及目标:①学习和掌握多传感器融合的基本理论与实现方法;②应用于移动机器人、无人车、无人机等系统的高精度定位与导航开发;③作为EKF算法在实际工程中应用的教学案例或项目参考; 阅读建议:建议读者结合Matlab代码逐行理解算法实现过程,重点关注状态预测与观测更新模块的设计逻辑,可尝试引入真实传感器数据或仿真噪声环境以验证算法鲁棒性,并进一步拓展至UKF、PF等更高级滤波算法的研究与对比。
内容概要:文章围绕智能汽车新一代传感器的发展趋势,重点阐述了BEV(鸟瞰图视角)端到端感知融合架构如何成为智能驾驶感知系统的新范式。传统后融合与前融合方案因信息丢失或算力需求过高难以满足高阶智驾需求,而基于Transformer的BEV融合方案通过统一坐标系下的多源传感器特征融合,在保证感知精度的同时兼顾算力可行性,显著提升复杂场景下的鲁棒性与系统可靠性。此外,文章指出BEV模型落地面临大算力依赖与高数据成本的挑战,提出“数据采集-模型训练-算法迭代-数据反哺”的高效数据闭环体系,通过自动化标注与长尾数据反馈实现算法持续进化,降低对人工标注的依赖,提升数据利用效率。典型企业案例进一步验证了该路径的技术可行性与经济价值。; 适合人群:从事汽车电子、智能驾驶感知算法研发的工程师,以及关注自动驾驶技术趋势的产品经理和技术管理者;具备一定自动驾驶基础知识,希望深入了解BEV架构与数据闭环机制的专业人士。; 使用场景及目标:①理解BEV+Transformer为何成为当前感知融合的主流技术路线;②掌握数据闭环在BEV模型迭代中的关键作用及其工程实现逻辑;③为智能驾驶系统架构设计、传感器选型与算法优化提供决策参考; 阅读建议:本文侧重技术趋势分析与系统级思考,建议结合实际项目背景阅读,重点关注BEV融合逻辑与数据闭环构建方法,并可延伸研究相关企业在舱泊一体等场景的应用实践。
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