本篇文章给大家谈谈Kahan'sSummationFormula原理—它是如何避免大数吃小数的，以及怎么避免大数吃小数的知识点，同时本文还将给你拓展@JoinColumnOrFormula(formu

本篇文章给大家谈谈Kahan's Summation Formula原理—它是如何避免大数吃小数的，以及怎么避免大数吃小数的知识点，同时本文还将给你拓展@JoinColumnOrFormula(formula=@JoinFormula org.hibernate.mapping.Formula cannot be cast to org.hibernate.mapping.Column、Acumatica PXFormula读取多个表的问题、AN4085, Tips for troubleshooting the MMA865x/MMA845x/MMA8491 Sensor Toolbox Communication Issues ...、Android ScaleAnimation和TranslateAnimation,如何避免ScaleAnimation运动等相关知识，希望对各位有所帮助，不要忘了收藏本站喔。

• Kahan's Summation Formula原理—它是如何避免大数吃小数的（怎么避免大数吃小数）
• @JoinColumnOrFormula(formula=@JoinFormula org.hibernate.mapping.Formula cannot be cast to org.hibernate.mapping.Column
• Acumatica PXFormula读取多个表的问题
• AN4085, Tips for troubleshooting the MMA865x/MMA845x/MMA8491 Sensor Toolbox Communication Issues ...
• Android ScaleAnimation和TranslateAnimation,如何避免ScaleAnimation运动

Kahan's Summation Formula原理—它是如何避免大数吃小数的（怎么避免大数吃小数）

function KahanSum(input)
    var sum = 0.0
    var c = 0.0          //A running compensation for lost low-order bits.
    for i = 1 to input.length do
        y = input[i] - c    //So far,so good: c is zero.
        t = sum + y         //Alas,sum is big,y small,so low-order digits of y are lost.
        c = (t - sum) - y   //(t - sum) recovers the high-order part of y; subtracting y recovers -(low part of y)
        sum = t             //Algebraically,c should always be zero. Beware eagerly optimising compilers!
        //Next time around,the lost low part will be added to y in a fresh attempt.
    return sum

@JoinColumnOrFormula(formula=@JoinFormula org.hibernate.mapping.Formula cannot be cast to org.hibernate.mapping.Column

@JoinColumnOrFormula (formula=@JoinFormula 在 hibernate4.3.11 中报错:

Caused by: java.lang.ClassCastException: org.hibernate.mapping.Formula cannot be cast to org.hibernate.mapping.Column
    at org.hibernate.cfg.annotations.TableBinder.bindFk(TableBinder.java:433)
    at org.hibernate.cfg.annotations.CollectionBinder.bindCollectionSecondPass(CollectionBinder.java:1467)
    at org.hibernate.cfg.annotations.CollectionBinder.bindOneToManySecondPass(CollectionBinder.java:865)
    at org.hibernate.cfg.annotations.CollectionBinder.bindStarToManySecondPass(CollectionBinder.java:780)
    at org.hibernate.cfg.annotations.CollectionBinder$1.secondPass(CollectionBinder.java:729)
    at org.hibernate.cfg.CollectionSecondPass.doSecondPass(CollectionSecondPass.java:70)
    at org.hibernate.cfg.Configuration.originalSecondPassCompile(Configuration.java:1697)
    at org.hibernate.cfg.Configuration.secondPassCompile(Configuration.java:1426)
    at org.hibernate.cfg.Configuration.buildSessionFactory(Configuration.java:1846)
    at org.hibernate.cfg.Configuration.buildSessionFactory(Configuration.java:1930)
    at org.springframework.orm.hibernate4.LocalSessionFactoryBuilder.buildSessionFactory(LocalSessionFactoryBuilder.java:372)
    at org.springframework.orm.hibernate4.LocalSessionFactoryBean.buildSessionFactory(LocalSessionFactoryBean.java:454)
    at org.springframework.orm.hibernate4.LocalSessionFactoryBean.afterPropertiesSet(LocalSessionFactoryBean.java:439)
    at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.invokeInitMethods(AbstractAutowireCapableBeanFactory.java:1631)
    at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.initializeBean(AbstractAutowireCapableBeanFactory.java:1568)
    ... 75 more

M_CIF_INTERNATIONAL_CHECK

package com.hnair.opcnet.ods.ml.model;

import java.util.Date;
import java.util.HashSet;
import java.util.Set;

import javax.persistence.Column;
import javax.persistence.Entity;
import javax.persistence.FetchType;
import javax.persistence.GeneratedValue;
import javax.persistence.GenerationType;
import javax.persistence.Id;
import javax.persistence.OneToMany;
import javax.persistence.Table;

import org.hibernate.annotations.Where;

import com.hnair.opcnet.common.util.DateUtils;

@Entity
@Table(name="M_CIF_INTERNATIONAL_CHECK")
public class M_CIF_INTERNATIONAL_CHECK implements java.io.Serializable {
	private static final long serialVersionUID = -1; 

	@Id 
	@GeneratedValue(strategy = GenerationType.IDENTITY) 
	@Column(name =  "ID") 
	private Long id;
	
	@Column(name =  "SRC_ID") 
	private String srcId;
	@OneToMany(fetch = FetchType.EAGER, mappedBy="check")
//	@Where(clause="DELETED = 0")
	private Set<M_CIF_INTERNATIONAL_CHECK_FILE> checkFile = new HashSet<M_CIF_INTERNATIONAL_CHECK_FILE>(); 

	public void setId(Long id){
		this.id=id;
	}
	public Long getId(){
		return id;
	}
	
	public Set<M_CIF_INTERNATIONAL_CHECK_FILE> getCheckFile() {
		return checkFile;
	}
	public void setCheckFile(Set<M_CIF_INTERNATIONAL_CHECK_FILE> checkFile) {
		this.checkFile = checkFile;
	}
}

M_CIF_INTERNATIONAL_CHECK_FILE

package com.hnair.opcnet.ods.ml.model;

import java.util.Date;

import javax.persistence.CascadeType;
import javax.persistence.Column;
import javax.persistence.Entity;
import javax.persistence.GeneratedValue;
import javax.persistence.GenerationType;
import javax.persistence.Id;
import javax.persistence.JoinColumn;
import javax.persistence.ManyToOne;
import javax.persistence.Table;

import org.hibernate.annotations.JoinColumnOrFormula;
import org.hibernate.annotations.JoinColumnsOrFormulas;
import org.hibernate.annotations.JoinFormula;

import com.hnair.opcnet.common.util.DateUtils;

@Entity
@Table(name="M_CIF_INTERNATIONAL_CHECK_FILE")
public class M_CIF_INTERNATIONAL_CHECK_FILE implements java.io.Serializable {
	private static final long serialVersionUID = -1; 

	@Id 
	@GeneratedValue(strategy = GenerationType.IDENTITY) 
	@Column(name =  "ID") 
	private Long id;
	 
	@Column(name =  "SRC_ID") 
	private String srcId;
	
	@ManyToOne(cascade = CascadeType.REFRESH, targetEntity = M_CIF_INTERNATIONAL_CHECK.class)
	@JoinColumnsOrFormulas(value={
			@JoinColumnOrFormula(column=@JoinColumn(name = "CHECKID", referencedColumnName = "SRC_ID", nullable = true, insertable = false, updatable = false))
			,@JoinColumnOrFormula(formula=@JoinFormula(value="0", referencedColumnName = "DELETED"))
			})
	private M_CIF_INTERNATIONAL_CHECK check;
	
	
	 /** 删除标志 */ 
	@Column(name =  "DELETED") 
	private Integer deleted;

	public void setId(Long id){
		this.id=id;
	}
	public Long getId(){
		return id;
	}
	
	 /** 设置 删除标志 */ 
	public void setDeleted(Integer deleted){
		this.deleted=deleted;
	}
	 /** 获取 删除标志 */ 
	public Integer getDeleted(){
		return deleted;
	}
	public M_CIF_INTERNATIONAL_CHECK getCheck() {
		return check;
	}
	public void setCheck(M_CIF_INTERNATIONAL_CHECK check) {
		this.check = check;
	}
}

主表 M_CIF_INTERNATIONAL_CHECK 中使用 @Where (clause="DELETED = 0")

子表 M_CIF_INTERNATIONAL_CHECK_FILE 取消，@JoinColumnOrFormula (formula=@JoinFormula (value="0", referencedColumnName = "DELETED"))

是正常的

Acumatica PXFormula读取多个表的问题

如何解决Acumatica PXFormula读取多个表的问题？

我正在使用套件行规格上的非持久字段。公式实际上只是数量乘以成本。问题是，std成本保存在InventoryItems表上，但平均或最后成本等却没有。该公式很容易得出标准成本，但事实也很难读取平均成本。我已经尝试了INItemStatsTotal和INItemCost来获取成本和其他工作，还尝试了额外的选择器来做到这一点，尽管标准成本很好，但其他成本却是空白。由于我也将其总计到标题中，因此应该将值的总和推送到标题中，这是在您更改标准成本项目时执行的操作，而不是其他项。下面是一个示例，其中包含多种获取数据的方法-dtd成本是唯一可行的方法。感谢您的帮助。

    [PXFormula(
        //typeof(Mult<Selector<INKitSpecstkDet.compInventoryID,InventoryItem.stdcost>,INKitSpecstkDet.dfltCompQty>),typeof(Mult<Selector<INKitSpecstkDet.compInventoryID,Switch<
                    Case<
                          Where<InventoryItem.valMethod,Equal<INValMethod.standard>>,InventoryItem.stdcost,Case<Where<InventoryItem.valMethod,Equal<INValMethod.average>>,INItemStatsTotal.avgCost
                            //,Selector<INKitSpecstkDet.compInventoryID,INItemCost.avgCost>,Equal<INValMethod.specific>>
                            //,INItemCost.lastCost,INItemStatsTotal.lastCost>,Equal<INValMethod.fIFO>>
                            //,INItemStatsTotal.lastCost>
                            >>>>>>,typeof(SumCalc<INKitSpecHdrExt.usrnpTotalStockCost>))]

解决方法

暂无找到可以解决该程序问题的有效方法，小编努力寻找整理中！

如果你已经找到好的解决方法，欢迎将解决方案带上本链接一起发送给小编。

小编邮箱:dio#foxmail.com (将#修改为@）

AN4085, Tips for troubleshooting the MMA865x/MMA845x/MMA8491 Sensor Toolbox Communication Issues ...

【直播预告】程序员逆袭 CEO 分几步？

点击获取完整资源：AN4085, Tips for troubleshooting the MMA865x/MMA845x/MMA8491 Sensor Toolbox Communication Issues - Application Note

Troubleshooting, MMA865x, MMA845x, MMA8491, STB, STB hardware, STB software, STB, Communication Issues, Motion/Freefall status indicator, user interface

点击获取完整资源：AN4085, Tips for troubleshooting the MMA865x/MMA845x/MMA8491 Sensor Toolbox Communication Issues - Application Note

Android ScaleAnimation和TranslateAnimation,如何避免ScaleAnimation运动

我有一个ScaleSet,里面有一个ScaleAnimation和一个TranslateAnimation,如下所示：

TranslateAnimation：

TranslateAnimation goTopFromright =
        new TranslateAnimation(0,-(right.getLeft()-top.getLeft()),-(right.getTop()-top.getTop()));

ScaleAnimation：

ScaleAnimation =  setSizeforTop = new ScaleAnimation(1,2,1,2);

和AnimationSet：

bringToLeftFromTopAnimationSet  = new AnimationSet(true);
bringToTopFromrightAnimationSet.addAnimation(goTopFromright);
bringToTopFromrightAnimationSet.addAnimation(setSizeforTop);

问题是,当我尝试仅使用ScaleAnimation时,我的项目会转到我想要的位置,但是当我在AnimationSet中使用ScaleAnimation和TranslateAnimation时,我的项目翻译的次数超出了我的需要,就像ScaleAnimation引入了一些补充一样动作abd我不知道如何删除它们.

谢谢您的帮助.

解决方法

正确的解决方案是改变动画的顺序.规模必须先行：

bringToTopFromrightAnimationSet.addAnimation(setSizeforTop);
bringToTopFromrightAnimationSet.addAnimation(goTopFromright);

我们今天的关于Kahan's Summation Formula原理—它是如何避免大数吃小数的和怎么避免大数吃小数的分享就到这里，谢谢您的阅读，如果想了解更多关于@JoinColumnOrFormula(formula=@JoinFormula org.hibernate.mapping.Formula cannot be cast to org.hibernate.mapping.Column、Acumatica PXFormula读取多个表的问题、AN4085, Tips for troubleshooting the MMA865x/MMA845x/MMA8491 Sensor Toolbox Communication Issues ...、Android ScaleAnimation和TranslateAnimation,如何避免ScaleAnimation运动的相关信息，可以在本站进行搜索。

本文标签：

• Kahan's_Summation_Formula
• 大数_吃小数
• 数值_计算
• 精确度_优化