活动介绍

JVM terminated.Exit code=2

时间: 2024-05-31 20:08:08 浏览: 179
As an AI language model, I do not have access to the specific context of your issue. However, in general, "JVM terminated. Exit code=2" means that the Java Virtual Machine (JVM) has encountered an error and has terminated. The exit code of 2 indicates that there was a problem with the command line arguments or input parameters. Some possible causes of this error could be: 1. Invalid command line arguments or input parameters 2. Incorrect version of the JVM or Java runtime environment 3. Memory issues, such as insufficient memory or a memory leak 4. Corrupted or missing system files or libraries To troubleshoot this error, you can start by checking the command line arguments or input parameters, ensuring that they are valid and correctly formatted. You can also try updating your JVM or Java runtime environment, and checking your system for any memory issues or corrupted files. Additionally, checking the logs or error messages generated by the JVM can provide more information on the specific cause of the error.
阅读全文

相关推荐

构建进程终止异常: C:\Users\liangh\.jdks\corretto-11.0.24\bin\java.exe -Xmx700m -Djava.awt.headless=true "-Djna.boot.library.path=D:\Idea2024\IntelliJ IDEA Community Edition 2024.1/lib/jna/amd64" -Djna.nosys=true -Djna.noclasspath=true -Dexternal.project.config=C:\Users\liangh\AppData\Local\JetBrains\IdeaIC2024.1\projects\gywycode.2a47e16a\external_build_system -Dcompile.parallel=false -Drebuild.on.dependency.change=true -Didea.IntToIntBtree.page.size=32768 -Djdt.compiler.useSingleThread=true -Daether.connector.resumeDownloads=false -Dio.netty.initialSeedUniquifier=-7772580090291254657 -Dfile.encoding=GBK -Duser.language=zh -Duser.country=CN -Didea.paths.selector=IdeaIC2024.1 -Djps.language.bundle=C:/Users/liangh/AppData/Roaming/JetBrains/IdeaIC2024.1/plugins/zh.241.271/lib/zh.241.271.jar "-Didea.home.path=D:/Idea2024/IntelliJ IDEA Community Edition 2024.1" -Didea.config.path=C:/Users/liangh/AppData/Roaming/JetBrains/IdeaIC2024.1 -Didea.plugins.path=C:/Users/liangh/AppData/Roaming/JetBrains/IdeaIC2024.1/plugins -Djps.log.dir=C:/Users/liangh/AppData/Local/JetBrains/IdeaIC2024.1/log/build-log "-Djps.fallback.jdk.home=D:/Idea2024/IntelliJ IDEA Community Edition 2024.1/jbr" -Djps.fallback.jdk.version=17.0.11 -Dio.netty.noUnsafe=true -Djava.io.tmpdir=C:/Users/liangh/AppData/Local/JetBrains/IdeaIC2024.1/compile-server/gywycode_af3c8cba/_temp_ -Djps.backward.ref.index.builder=true -Djps.backward.ref.index.builder.fs.case.sensitive=false "-Djps.kotlin.home=D:\Idea2024\IntelliJ IDEA Community Edition 2024.1\plugins\Kotlin\kotlinc" -Dkotlin.incremental.compilation=true -Dkotlin.incremental.compilation.js=true -Dkotlin.daemon.enabled -Dkotlin.daemon.client.alive.path=\"C:\Windows\Temp\kotlin-idea-11626471297649951508-is-running\" -Dide.propagate.context=false -classpath "D:/Idea2024/IntelliJ IDEA Community Edition 2024.1/plugins/java/lib/jps-launcher.jar" org.jetbrains.jps.cmdline.Launcher "D:/Idea2024/IntelliJ IDEA Community Edition 2024.1/plugins/java/lib/jps-builders.jar;D:/Idea202

[INFO] BUILD FAILURE [INFO] ------------------------------------------------------------------------ [INFO] Total time: 1.500 s [INFO] Finished at: 2025-07-24T10:41:36+08:00 [INFO] ------------------------------------------------------------------------ [ERROR] Failed to execute goal org.apache.maven.plugins:maven-surefire-plugin:3.5.2:test (default-test) on project common: [ERROR] [ERROR] See D:\Git_Code\AI-Interview-dev\common\target\surefire-reports for the individual test results. [ERROR] See dump files (if any exist) [date].dump, [date]-jvmRun[N].dump and [date].dumpstream. [ERROR] The forked VM terminated without properly saying goodbye. VM crash or System.exit called? [ERROR] Command was cmd.exe /X /C "D:\JDK(OpenJDK21)\jdk-21\bin\java -jar C:\Users\Lenovo\AppData\Local\Temp\surefire9960548804214740057\surefirebooter-20250724104136110_3.jar C:\Users\Lenovo\AppData\Local\Temp\surefire9960548804214740057 2025-07-24T10-41-35_989-jvmRun1 surefire-20250724104136110_1tmp surefire_0-20250724104136110_2tmp" [ERROR] Error occurred in starting fork, check output in log [ERROR] Process Exit Code: 1 [ERROR] org.apache.maven.surefire.booter.SurefireBooterForkException: The forked VM terminated without properly saying goodbye. VM crash or System.exit called? [ERROR] Command was cmd.exe /X /C "D:\JDK(OpenJDK21)\jdk-21\bin\java -jar C:\Users\Lenovo\AppData\Local\Temp\surefire9960548804214740057\surefirebooter-20250724104136110_3.jar C:\Users\Lenovo\AppData\Local\Temp\surefire9960548804214740057 2025-07-24T10-41-35_989-jvmRun1 surefire-20250724104136110_1tmp surefire_0-20250724104136110_2tmp" [ERROR] Error occurred in starting fork, check output in log [ERROR] Process Exit Code: 1 [ERROR] at org.apache.maven.plugin.surefire.booterclient.ForkStarter.fork(ForkStarter.java:643) [ERROR] at org.apache.maven.plugin.surefire.booterclient.ForkStarter.run(ForkStarter.java:285) [ERROR] at org.apache.maven.plugin.surefire.booterclient.ForkStarter.run(ForkStarter.java:250) [ERROR]

# 创建命名空间 apiVersion: v1 kind: Namespace metadata: name: starrocks --- # 配置MinIO访问密钥Secret apiVersion: v1 kind: Secret metadata: name: starrocks-s3-secret namespace: starrocks type: Opaque stringData: AWS_ACCESS_KEY_ID: "admin" # MinIO访问密钥 AWS_SECRET_ACCESS_KEY: "izhMinio@pasword" # MinIO密钥 AWS_ENDPOINT: "http://minio-svc.minio-ns.svc.cluster.local:9000" # MinIO服务地址 AWS_DEFAULT_REGION: "cn-north-1" --- # FE ConfigMap apiVersion: v1 kind: ConfigMap metadata: name: fe-config namespace: starrocks data: fe.conf: | brpc_port = 8060 enable_brpc_ssl = false enable_fqdn_mode = true cloud_native_meta_port = 6090 meta_dir = /opt/starrocks/fe/meta edit_log_port = 9010 http_port = 8030 query_port = 9030 JAVA_OPTS = -Xmx16g -Xms16g --- # StorageClass(确保集群已部署local-path-provisioner) apiVersion: storage.k8s.io/v1 kind: StorageClass metadata: name: local-path-starrocks provisioner: rancher.io/local-path volumeBindingMode: WaitForFirstConsumer reclaimPolicy: Retain # 保留数据防止误删除 --- # FE Service apiVersion: v1 kind: Service metadata: name: fe-service namespace: starrocks spec: type: NodePort ports: - name: edit-log # 新增9010端口映射 port: 9010 targetPort: 9010 - name: query port: 9030 targetPort: 9030 nodePort: 31030 - name: http port: 8030 targetPort: 8030 nodePort: 31031 selector: app: fe --- # BE Service apiVersion: v1 kind: Service metadata: name: be-service namespace: starrocks spec: clusterIP: None ports: - name: be port: 9060 targetPort: 9060 - name: heartbeat port: 9050 targetPort: 9050 selector: app: be --- # BE ConfigMap apiVersion: v1 kind: ConfigMap metadata: name: be-config namespace: starrocks data: be.conf: | heartbeat_service_port = 9050 heartbeat_service_address = fe-service.starrocks.svc.cluster.local storage_root_path = /opt/starrocks/storage_data webserver_port = 8040 be_port = 9060 be_http_port = 8040 brpc_port = 8060 cloud_native_meta_port = 6090 # 存算分离核心配置(需与MinIO完全匹配) aws_s3_endpoint = minio-svc.minio-ns.svc.cluster.local:9000 aws_s3_path = s3://starrocks-data/ aws_s3_access_key = admin aws_s3_secret_key = izhMinio@pasword aws_s3_use_aws_sdk_default_behavior = false # 必须关闭AWS默认行为 aws_s3_enable_path_style_access = true # MinIO需要启用路径模式 # 存算分离配置 run_mode = shared_data cloud_native_storage_type = S3 aws_s3_path = "s3://starrocks-data/" # 生产环境JVM参数 JAVA_OPTS = -Xmx32g -Xms32g -XX:+UseG1GC JAVA_HOME = /opt/starrocks/jdk-17 --- # FE StatefulSet apiVersion: apps/v1 kind: StatefulSet metadata: name: fe namespace: starrocks spec: serviceName: fe-service replicas: 3 selector: matchLabels: app: fe template: metadata: labels: app: fe spec: affinity: podAntiAffinity: requiredDuringSchedulingIgnoredDuringExecution: - labelSelector: matchExpressions: - key: app operator: In values: ["fe"] topologyKey: "kubernetes.io/hostname" containers: - name: fe image: registry.cn-shanghai.aliyuncs.com/vsi-open/starrocks-fe:2025-05-22 command: - /bin/sh - -c - | # 添加日志输出便于调试 echo "Starting FE with ID ${FE_ID}"; if [ "${FE_ID}" = "fe-0" ]; then /opt/starrocks/fe/bin/start_fe.sh --host_type=FQDN else export JAVA_OPTS="-Xmx16g -Xms16g -Dcom.alibaba.rocketmq.client.sendSmartMsg=false" /opt/starrocks/fe/bin/start_fe.sh --helper=fe-0.fe-service.starrocks.svc.cluster.local:9010 --host_type=FQDN fi lifecycle: preStop: exec: command: ["/opt/starrocks/fe/bin/stop_fe.sh"] env: - name: FE_MASTER_SERVERS # 主节点专用配置 value: "fe-0.fe-service.starrocks.svc.cluster.local:9010" - name: FE_SERVERS value: "fe-0.fe-service.starrocks.svc.cluster.local:9010,fe-1.fe-service.starrocks.svc.cluster.local:9010,fe-2.fe-service.starrocks.svc.cluster.local:9010" - name: FE_ID valueFrom: fieldRef: fieldPath: metadata.name ports: - containerPort: 9010 # 内部通信端口 - containerPort: 9030 # MySQL协议端口 - containerPort: 8030 # HTTP端口 volumeMounts: - name: meta mountPath: /opt/starrocks/fe/meta - name: config mountPath: /opt/starrocks/fe/conf/fe.conf subPath: fe.conf readinessProbe: httpGet: path: /api/health port: 8030 initialDelaySeconds: 120 periodSeconds: 20 failureThreshold: 5 livenessProbe: httpGet: path: /api/health port: 8030 initialDelaySeconds: 200 periodSeconds: 30 failureThreshold: 3 volumes: - name: config configMap: name: fe-config volumeClaimTemplates: - metadata: name: meta spec: accessModes: [ "ReadWriteOnce" ] storageClassName: "local-path-starrocks" resources: requests: storage: 50Gi --- # BE StatefulSet apiVersion: apps/v1 kind: StatefulSet metadata: name: be namespace: starrocks spec: serviceName: be-service replicas: 4 selector: matchLabels: app: be template: metadata: labels: app: be spec: affinity: podAntiAffinity: requiredDuringSchedulingIgnoredDuringExecution: - labelSelector: matchExpressions: - key: app operator: In values: ["be"] topologyKey: "kubernetes.io/hostname" containers: - name: be image: registry.cn-shanghai.aliyuncs.com/vsi-open/starrocks-be:2025-05-22 command: ["/opt/starrocks/be/bin/start_be.sh"] lifecycle: preStop: exec: command: ["/opt/starrocks/be/bin/stop_be.sh"] envFrom: - secretRef: name: starrocks-s3-secret env: - name: AWS_REGION value: "cn-north-1" - name: AWS_S3_ENDPOINT value: "minio-svc.minio-ns.svc.cluster.local:9000" - name: AWS_S3_USE_AWS_SDK_DEFAULT_BEHAVIOR value: "false" ports: - containerPort: 9060 name: hb-port # 心跳端口 - containerPort: 8040 name: http-port # 管理端口 - containerPort: 9050 name: hb-svc-port # 心跳服务端口 volumeMounts: - name: config mountPath: /opt/starrocks/be/conf/be.conf subPath: be.conf - name: storage mountPath: /opt/starrocks/be/storage resources: requests: cpu: 8 memory: 8Gi limits: cpu: 16 memory: 16Gi livenessProbe: tcpSocket: port: 9060 initialDelaySeconds: 120 periodSeconds: 20 readinessProbe: tcpSocket: port: 9060 initialDelaySeconds: 60 periodSeconds: 15 volumes: - name: config configMap: name: be-config volumeClaimTemplates: - metadata: name: meta spec: accessModes: [ "ReadWriteOnce" ] storageClassName: "local-path-starrocks" resources: requests: storage: 50Gi - metadata: name: storage spec: accessModes: [ "ReadWriteOnce" ] storageClassName: "local-path-starrocks" resources: requests: storage: 100Gi # 根据数据量调整 不用考虑minio,与宁状态如下 ➜ StarRocks git:(master) ✗ kubectl get pod -n starrocks -o wide NAME READY STATUS RESTARTS AGE IP NODE NOMINATED NODE READINESS GATES be-0 1/1 Running 0 152m 172.18.3.241 follower03 <none> <none> be-1 1/1 Running 0 151m 172.18.1.57 follower01 <none> <none> be-2 1/1 Running 0 150m 172.18.0.130 leader01 <none> <none> be-3 1/1 Running 0 149m 172.18.2.222 follower02 <none> <none> fe-0 1/1 Running 0 7m22s 172.18.3.62 follower03 <none> <none> fe-1 0/1 Running 1 (46s ago) 5m17s 172.18.1.93 follower01 <none> <none> ➜ StarRocks git:(master) ✗ kubectl describe pod fe-1 -n starrocks Name: fe-1 Namespace: starrocks Priority: 0 Service Account: default Node: follower01/192.168.11.102 Start Time: Tue, 27 May 2025 15:47:56 +0800 Labels: app=fe apps.kubernetes.io/pod-index=1 controller-revision-hash=fe-675df448fb statefulset.kubernetes.io/pod-name=fe-1 Annotations: <none> Status: Running IP: 172.18.1.93 IPs: IP: 172.18.1.93 Controlled By: StatefulSet/fe Containers: fe: Container ID: containerd://463884b0da7eb4156097e7692746062da4046cc63df8d6d0f4c3dc615d4246ab Image: registry.cn-shanghai.aliyuncs.com/vsi-open/starrocks-fe:2025-05-22 Image ID: registry.cn-shanghai.aliyuncs.com/vsi-open/starrocks-fe@sha256:f581e1038681fa2f5d65bbb082f1d47d49fcab8ca37afb02c0eec5685947952d Ports: 9010/TCP, 9030/TCP, 8030/TCP Host Ports: 0/TCP, 0/TCP, 0/TCP Command: /bin/sh -c echo "Starting FE with ID ${FE_ID}"; if [ "${FE_ID}" = "fe-0" ]; then /opt/starrocks/fe/bin/start_fe.sh else echo "--helper=fe-0.fe-service.starrocks.svc.cluster.local:9010"; /opt/starrocks/fe/bin/start_fe.sh --helper=fe-0.fe-service.starrocks.svc.cluster.local:9010 fi State: Running Started: Tue, 27 May 2025 15:52:27 +0800 Last State: Terminated Reason: Error Exit Code: 143 Started: Tue, 27 May 2025 15:47:57 +0800 Finished: Tue, 27 May 2025 15:52:27 +0800 Ready: False Restart Count: 1 Liveness: http-get http://:8030/api/health delay=200s timeout=1s period=30s #success=1 #failure=3 Readiness: http-get http://:8030/api/health delay=120s timeout=1s period=20s #success=1 #failure=5 Environment: FE_MASTER_SERVERS: fe-0.fe-service.starrocks.svc.cluster.local:9010 FE_SERVERS: fe-0.fe-service.starrocks.svc.cluster.local:9010,fe-1.fe-service.starrocks.svc.cluster.local:9010,fe-2.fe-service.starrocks.svc.cluster.local:9010 FE_ID: fe-1 (v1:metadata.name) Mounts: /opt/starrocks/fe/conf/fe.conf from config (rw,path="fe.conf") /opt/starrocks/fe/meta from meta (rw) /var/run/secrets/kubernetes.io/serviceaccount from kube-api-access-65kpf (ro) Conditions: Type Status PodReadyToStartContainers True Initialized True Ready False ContainersReady False PodScheduled True Volumes: meta: Type: PersistentVolumeClaim (a reference to a PersistentVolumeClaim in the same namespace) ClaimName: meta-fe-1 ReadOnly: false config: Type: ConfigMap (a volume populated by a ConfigMap) Name: fe-config Optional: false kube-api-access-65kpf: Type: Projected (a volume that contains injected data from multiple sources) TokenExpirationSeconds: 3607 ConfigMapName: kube-root-ca.crt ConfigMapOptional: <nil> DownwardAPI: true QoS Class: BestEffort Node-Selectors: <none> Tolerations: node.kubernetes.io/not-ready:NoExecute op=Exists for 300s node.kubernetes.io/unreachable:NoExecute op=Exists for 300s Events: Type Reason Age From Message ---- ------ ---- ---- ------- Normal Scheduled 5m32s default-scheduler Successfully assigned starrocks/fe-1 to follower01 Normal Pulled 62s (x2 over 5m32s) kubelet Container image "registry.cn-shanghai.aliyuncs.com/vsi-open/starrocks-fe:2025-05-22" already present on machine Normal Created 62s (x2 over 5m32s) kubelet Created container: fe Normal Started 62s (x2 over 5m32s) kubelet Started container fe Warning Unhealthy 62s (x9 over 3m23s) kubelet Readiness probe failed: Get "http://172.18.1.93:8030/api/health": dial tcp 172.18.1.93:8030: connect: connection refused Warning Unhealthy 62s (x3 over 2m2s) kubelet Liveness probe failed: Get "http://172.18.1.93:8030/api/health": dial tcp 172.18.1.93:8030: connect: connection refused Normal Killing 62s kubelet Container fe failed liveness probe, will be restarted Warning FailedPreStopHook 62s kubelet PreStopHook failed kubectl exec fe-0 -n starrocks -- curl http://localhost:8030/api/health % Total % Received % Xferd Average Speed Time Time Time Current Dload Upload Total Spent Left Speed 100 60 100 60 0 0 46224 0 --:--:-- --:--:-- --:--:-- 60000{"online_backend_num":0,"total_backend_num":4,"status":"OK"} ➜ StarRocks git:(master) ✗ 我手动登陆fe-0 将4个be添加“ALTER SYSTEM ADD BACKEND”,但其alive都是false 特别说明 我的镜像是基于fe-ubuntu:latest与be-ubuntu:latest,不支持/opt/starrocks/be/bin/start_backend.sh -be_port=9060 webserver_port=8040 请修正

2025-08-09 04:57:47,757 [main/] INFO [traceId ] o.s.o.j.LocalContainerEntityManagerFactoryBean[447] - Initialized JPA EntityManagerFactory for persistence unit 'firstPersistenceUnit' 2025-08-09 04:57:48,458 [main/] INFO [traceId ] o.s.d.j.r.q.QueryEnhancerFactory[126] - JSqlParser is in classpath; If applicable, JSqlParser will be used. 2025-08-09 04:57:48,458 [main/] INFO [traceId ] o.s.d.j.r.q.QueryEnhancerFactory[49] - Hibernate is in classpath; If applicable, HQL parser will be used. 2025-08-09 04:57:51,428 [main/] WARN [traceId ] o.s.b.a.o.j.JpaBaseConfiguration$JpaWebConfiguration[241] - spring.jpa.open-in-view is enabled by default. Therefore, database queries may be performed during view rendering. Explicitly configure spring.jpa.open-in-view to disable this warning 2025-08-09 04:57:54,541 [main/] INFO [traceId ] o.s.b.a.e.w.EndpointLinksResolver[60] - Exposing 1 endpoint beneath base path '/actuator' 2025-08-09 04:57:54,677 [main/] INFO [traceId ] o.a.c.h.Http11NioProtocol[173] - Starting ProtocolHandler ["https-jsse-nio-8888"] 2025-08-09 04:57:54,808 [main/] INFO [traceId ] o.a.t.u.n.N.certificate[173] - Connector [https-jsse-nio-8888], TLS virtual host [_default_], certificate type [UNDEFINED] configured from key store [/home/g.ratan.001/.keystore] using alias [uklvapapp290p.gdc.standardchartered.com] with trust store [null] 2025-08-09 04:57:54,834 [main/] INFO [traceId ] o.s.b.w.e.t.TomcatWebServer[243] - Tomcat started on port 8888 (https) with context path '/' 2025-08-09 04:57:54,869 [main/] INFO [traceId ] c.s.r.e.Application[59] - Started Application in 18.879 seconds (process running for 21.277) 2025-08-09 04:57:54,883 [main/] INFO [traceId ] o.s.b.a.b.JobLauncherApplicationRunner[168] - Running default command line with: [] 2025-08-09 04:57:56,443 [scheduling-1/] WARN [traceId ] o.a.h.u.NativeCodeLoader[60] - Unable to load native-hadoop library for your platform... using builtin-java classes where applicable 2025-08-09 04:57:56,560 [scheduling-1/] INFO [traceId ] o.a.h.s.UserGroupInformation[1132] - Login successful for user [email protected] using keytab file g.ratan.001.keytab. Keytab auto renewal enabled : false 2025-08-09 04:57:56,561 [scheduling-1/] INFO [traceId ] c.s.r.e.c.HiveDruidConfig[73] - Login Kerberos Job Success. 2025-08-09 04:57:58,349 [https-jsse-nio-8888-exec-3/] INFO [traceId ] o.a.c.c.C.[.[.[/][173] - Initializing Spring DispatcherServlet 'dispatcherServlet' 2025-08-09 04:57:58,350 [https-jsse-nio-8888-exec-3/] INFO [traceId ] o.s.w.s.DispatcherServlet[532] - Initializing Servlet 'dispatcherServlet' 2025-08-09 04:57:58,352 [https-jsse-nio-8888-exec-3/] INFO [traceId ] o.s.w.s.DispatcherServlet[554] - Completed initialization in 2 ms 2025-08-09 04:58:59,985 [SpringApplicationShutdownHook/] INFO [traceId ] o.s.b.w.e.t.GracefulShutdown[54] - Commencing graceful shutdown. Waiting for active requests to complete 2025-08-09 04:58:59,990 [tomcat-shutdown/] INFO [traceId ] o.s.b.w.e.t.GracefulShutdown[76] - Graceful shutdown complete 2025-08-09 04:59:00,009 [SpringApplicationShutdownHook/] INFO [traceId ] c.a.d.p.DruidDataSource[2174] - {dataSource-0} closing ... 2025-08-09 04:59:00,011 [SpringApplicationShutdownHook/] INFO [traceId ] o.s.o.j.LocalContainerEntityManagerFactoryBean[660] - Closing JPA EntityManagerFactory for persistence unit 'firstPer sistenceUnit' 2025-08-09 04:59:00,015 [SpringApplicationShutdownHook/] INFO [traceId ] c.z.h.HikariDataSource[349] - PostgreSQLConnectHikariCP - Shutdown initiated... 2025-08-09 04:59:00,051 [SpringApplicationShutdownHook/] INFO [traceId ] c.z.h.HikariDataSource[351] - PostgreSQLConnectHikariCP - Shutdown completed. 分析为什么程序会关闭

最新推荐

recommend-type

springboot尿毒症健康管理系统的设计与实现论文

springboot尿毒症健康管理系统的设计与实现
recommend-type

python 列表文本转表格

python
recommend-type

关于多视图几何的论文,以及与点云深度学习相关的文章

资源下载链接为: https://pan.quark.cn/s/a447291460bd 关于多视图几何的论文,以及与点云深度学习相关的文章(最新、最全版本!打开链接下载即可用!)
recommend-type

基于MATLAB Simulink的质子交换膜燃料电池系统模型开发与控制策略仿真

内容概要:本文详细探讨了质子交换膜燃料电池(PEMFC)系统模型的构建与开发,特别是利用MATLAB Simulink平台进行建模和仿真的方法。文中涵盖了空压机、供气系统(阴极和阳极)、背压阀和电堆四个核心组件的数学模型建立,旨在帮助研究人员更好地理解PEMFC系统的运行机制。此外,还介绍了如何通过调整各组件的关键参数来优化系统的性能,从而为实际应用提供了理论依据和技术支持。 适合人群:从事燃料电池研究的技术人员、高校相关专业师生、新能源领域的科研工作者。 使用场景及目标:适用于希望深入了解PEMFC系统内部运作机制的研究人员,以及需要进行控制系统设计和优化的工程技术人员。目标是掌握MATLAB Simulink建模技巧,提升对PEMFC系统的理解和应用能力。 其他说明:文章不仅提供了详细的模型构建步骤,还包括具体的示例代码和讨论,便于读者实践操作并加深理解。
recommend-type

Mockingbird v2:PocketMine-MP新防作弊机制详解

标题和描述中所涉及的知识点如下: 1. Mockingbird反作弊系统: Mockingbird是一个正在开发中的反作弊系统,专门针对PocketMine-MP服务器。PocketMine-MP是Minecraft Pocket Edition(Minecraft PE)的一个服务器软件,允许玩家在移动平台上共同游戏。随着游戏的普及,作弊问题也随之而来,因此Mockingbird的出现正是为了应对这种情况。 2. Mockingbird的版本迭代: 从描述中提到的“Mockingbird的v1变体”和“v2版本”的变化来看,Mockingbird正在经历持续的开发和改进过程。软件版本迭代是常见的开发实践,有助于修复已知问题,改善性能和用户体验,添加新功能等。 3. 服务器性能要求: 描述中强调了运行Mockingbird的服务器需要具备一定的性能,例如提及“WitherHosting的$ 1.25计划”,这暗示了反作弊系统对服务器资源的需求较高。这可能是因为反作弊机制需要频繁处理大量的数据和事件,以便及时检测和阻止作弊行为。 4. Waterdog问题: Waterdog是另一种Minecraft服务器软件,特别适合 PocketMine-MP。描述中提到如果将Mockingbird和Waterdog结合使用可能会遇到问题,这可能是因为两者在某些机制上的不兼容或Mockingbird对Waterdog的特定实现尚未完全优化。 5. GitHub使用及问题反馈: 作者鼓励用户通过GitHub问题跟踪系统来报告问题、旁路和功能建议。这是一个公共代码托管平台,广泛用于开源项目协作,便于开发者和用户进行沟通和问题管理。作者还提到请用户在GitHub上发布问题而不是在评论区留下不好的评论,这体现了良好的社区维护和用户交流的实践。 6. 软件标签: “pocketmine”和“anticheat”(反作弊)作为标签,说明Mockingbird是一个特别为PocketMine-MP平台开发的反作弊软件。而“PHP”则可能指的是Mockingbird的开发语言,虽然这个信息与常见的Java或C++等开发Minecraft相关软件的语言不同,但并不排除使用PHP进行服务器端开发的可能性,尤其是对于处理动态网页、服务器端脚本等场景。 7. 压缩包文件: “Mockingbird-stable”是一个文件名称,很可能表示这是一个包含最新稳定版Mockingbird反作弊系统的压缩包。通常,这样的文件名中包含“stable”意味着这是一个经过充分测试且推荐用于生产环境的版本。 8. 社区协作和用户参与: 特别感谢部分提到了shur,这可能是对某位贡献者或社区成员的感激之情。这种感谢表明了软件开发不仅是开发者个人的劳动成果,同时也依赖于社区的支持和参与,包括提供反馈、报告问题、贡献代码和文档等。 总结以上内容,我们可以看到Mockingbird作为一款反作弊系统,其开发和维护需要依赖于社区的广泛参与和支持,同时还需要强大的服务器后端作为支撑。通过不断迭代更新版本,开发者希望解决现有问题,提高反作弊效率,并希望与社区保持良好的沟通,以持续优化产品。
recommend-type

“历史人物独白解说”视频:数据处理的6种革命性技术

# 1. 数据处理的历史回顾与技术演进 数据处理的历史,从最初的简单机械记录,到如今复杂的数据处理体系,不仅反映了技术的演进,也映射了人类社会进步的轨迹。在计算机技术发展初期,数据处理主要依靠打孔卡片和磁带,通过批处理的方式进行,效率低下且出错率高。随着技术的发展,上世纪70年代,关系型数据库的出现大大提高了数据处理的效率和准确性,为数据处理技术的发展奠定了基础。 随后,随着互
recommend-type

怎么判断多级运放电路的稳定性?

<think>首先,用户的问题是关于判断多级运算放大器电路的稳定性。我需要根据系统级指令来构建回答。 系统级指令: - 所有行内数学表达式必须使用$...$格式。 - 独立公式必须使用$$...$$格式并单独成段。 - LaTeX语法正确。 - 使用中文回答。 - 生成相关问题。 - 在回答中引用的段落末尾自然地添加引用标识,例如[^1]。 用户可见层指令: - 回答结构清晰,帮助用户逐步解决问题。 - 尽量保证回答真实可靠。 参考引用: - 引用[1]:关于集成运算放大电路的设计、组成和性能评估。 - 引用[2]:高频电路中运放的带宽限制,一级放大电路的增益通常为100倍,过高会引起振
recommend-type

利用AHP和节点集中度解决影响力最大化问题的Flask应用教程

从给定的文件信息中,我们可以提取以下相关知识点进行详细说明: ### 标题知识点 **IM问题与AHP结合** IM问题(Influence Maximization)是网络分析中的一个核心问题,旨在识别影响网络中信息传播的关键节点。为了求解IM问题,研究者们常常结合使用不同的算法和策略,其中AHP(Analytic Hierarchy Process,分析层次结构过程)作为一种决策分析方法,被用于评估网络节点的重要性。AHP通过建立层次模型,对各个因素进行比较排序,从而量化影响度,并通过一致性检验保证决策结果的有效性。将AHP应用于IM问题,意味着将分析网络节点影响的多个维度,比如节点的中心性(centrality)和影响力。 **集中度措施** 集中度(Centralization)是衡量网络节点分布状况的指标,它反映了网络中节点之间的连接关系。在网络分析中,集中度常用于识别网络中的“枢纽”或“中心”节点。例如,通过计算网络的度中心度(degree centrality)可以了解节点与其他节点的直接连接数量;接近中心度(closeness centrality)衡量节点到网络中其他所有节点的平均距离;中介中心度(betweenness centrality)衡量节点在连接网络中其他节点对的最短路径上的出现频率。集中度高意味着节点在网络中处于重要位置,对信息的流动和控制具有较大影响力。 ### 描述知识点 **Flask框架** Flask是一个轻量级的Web应用框架,它使用Python编程语言开发。它非常适合快速开发小型Web应用,以及作为微服务架构的一部分。Flask的一个核心特点是“微”,意味着它提供了基本的Web开发功能,同时保持了框架的小巧和灵活。Flask内置了开发服务器,支持Werkzeug WSGI工具包和Jinja2模板引擎,提供了RESTful请求分发和请求钩子等功能。 **应用布局** 一个典型的Flask应用会包含以下几个关键部分: - `app/`:这是应用的核心目录,包含了路由设置、视图函数、模型和控制器等代码文件。 - `static/`:存放静态文件,比如CSS样式表、JavaScript文件和图片等,这些文件的内容不会改变。 - `templates/`:存放HTML模板文件,Flask将使用这些模板渲染最终的HTML页面。模板语言通常是Jinja2。 - `wsgi.py`:WSGI(Web Server Gateway Interface)是Python应用程序和Web服务器之间的一种标准接口。这个文件通常用于部署到生产服务器时,作为应用的入口点。 **部署到Heroku** Heroku是一个支持多种编程语言的云平台即服务(PaaS),它允许开发者轻松部署、运行和管理应用。部署Flask应用到Heroku,需要几个步骤:首先,创建一个Procfile文件,告知Heroku如何启动应用;其次,确保应用的依赖关系被正确管理,通常通过一个requirements.txt文件列出所有依赖;最后,使用Git将应用推送到Heroku提供的仓库,Heroku会自动识别Procfile并开始部署过程。 ### 标签知识点 **HTML** HTML(HyperText Markup Language,超文本标记语言)是用于创建网页和Web应用的标准标记语言。它定义了网页的结构和内容。HTML文件由一系列元素组成,这些元素通过标签(tags)来表示,如`<p>`代表段落,`<a>`代表链接,`<img>`代表图像等。HTML5是当前使用的最新版本,支持更多的特性,如离线存储、多媒体和图形等。 ### 压缩包子文件的文件名称列表知识点 **IMproblem-using-AHP-and-centralisation-of-nodes-master** 这里的文件名称“IMproblem-using-AHP-and-centralisation-of-nodes-master”表明了一个GitHub仓库的名称,其中包含了源代码以及与项目相关的所有文件。从名称中可以看出,该仓库是关于如何结合AHP和节点集中度分析来解决IM问题的Flask应用程序。文件名中的“master”表明这是仓库的主分支(现在叫做main分支),它是项目最新的、可部署的代码版本。 综合来看,本段信息为我们提供了构建和部署一个使用Flask框架、针对IM问题使用AHP和节点集中度分析的Web应用的方法和步骤。同时,介绍了应用在不同环节中所需技术和组件的详细知识点。
recommend-type

视频内容自动生成算法:突破性的8大最新进展

# 1. 视频内容自动生成算法概述 ## 算法发展背景 随着人工智能技术的迅速发展,视频内容自动生成算法已经成为媒体和娱乐行业的重要工具。这些算法能够自动编辑和合成视频内容,使内容创作者能够以较低的成本和时间生成高质量的视频。从社交媒体动态到在线教育内容,视频内容自动生成的应用场景正在不断扩大。 ## 核心技术简述 视
recommend-type

Softmax函数实际应用举例

<think>嗯,用户现在想了解Softmax函数的实际应用场景,这和我之前详细解释过的Softmax原理是直接相关的。用户特意提到要参考站内引用,看来是想看到具体案例支撑。 从用户提问方式看,ta应该已经理解了Softmax的基本数学原理(毕竟我上次用向量[2,1,0.1]的例子详细演示过计算过程),现在需要落地到实践层面。这种从理论到应用的递进很合理,可能是个正在学习机器学习的学生,或者需要解决实际问题的工程师。 我注意到用户提供的引用里有些关键线索:引用[1]提到图像分类和概率解释,引用[4]强调指数放大的特性,引用[5]则对比了Sigmoid在多标签分类的应用差异。这些正好能支撑我