为项目供应一款特殊设备的供应商报告称,由于次级供应商遇到技术问题,交货可能会迟延。为了保持进度计划,该供应商提议弃用该次级供应商的组件,代之以与项目规格中规定的组件不同的类似部件。项目经理接下来该做什么?
A vendor supplying a piece of specialized equipment for a project has reported the potential for a delivery delay due to a technical issue with the sub-supplier To stay on schedule,the vendor proposed replacing the sub-supplier'ponent with a similar part that is different from the one that is stipulated in the project specifications. What should the project manager do next?
A :坚持要求使用符合项目规格的组件,并将设备空运过来,以减轻迟延风险。 Insist on using ponent per the project specifications and air freight the equipment to mitigate the delay.
B :接受更换提议,以便使采购活动正常进行。 ept the proposed replacement in order to keep procurement activities on track.
C :指示供应商使用符合项目规格的部件,并更新进度计划。 Instruct the vendor to use the part that pliant with the project specifications and update the schedule.
D :咨询主题专家(SME)的意见,了解该变更提议可否接受。 Consult with a subject matter expert (SME)to see if the proposed change is eptable.
正确答案:D
解析:《PMBOK》第6版492页,12.3-控制采购。
供应商要更换提供的组件,“代之以与项目规格中规定的组件不同的类似部件”,需要通过变更的方式去实施。
在实施整体变更控制流程中,要评估供应商主张替换的组件是否可被接受,D选项正确。
选项AC,都属于通过变更评估后可能给出的决策。
选项
B,未经变更就接受主张,错误。
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问:用Vue3写一个日期组件
ChatGPT:
// vue3-date.js
import { defineComponent, reactive, ref, onMounted } from &39;;
export default defineComponent({
setup() {
const date = ref(new Date());
let formatDate = (date) => {
const month = date.getMonth() + 1;
const day = date.getDate(); return date.getFullYear() + &39; + (month < 10 ? &39; + month : month) + &39; + (day < 10 ? &39; + day : day);
};
const state = reactive({
year: ref(date.value.getFullYear()),
month: ref(date.value.getMonth() + 1),
day: ref(date.value.getDate())
});
const selectDate = (date) => {
date.value.setFullYear(state.year.value)
date.value.setMonth(state.month.value - 1)
date.value.setDate(state.day.value)
}
onMounted(() => {
selectDate(date);
});
return {
state,
date,
selectDate,
formatDate
}
},
template: `
<div>
<p>
<span>年:</span><input v-model=&34; type=&34;/>
</p>
<p>
<span>月:</span><input v-model=&34; type=&34;/>
</p>
<p>
<span>日:</span><input v-model=&34; type=&34;/>
</p>
<p>{{date.value | formatDate(&39;)}}</p>
</div>
`
})
const app = Vue.createApp({
data: () => ({
date: new Date()
}),
ponents: {
DatePicker
}
});
app.mount(&39;);
【西门子75米长的风力发电子叶片】
西门子成功研发出了世界上最长的风力涡轮机转子叶片。叶片长75米,几乎与一架空客A380客机的翼展一样长。从今年秋季开始,B75转子叶片将被安装到位于丹麦Østerild测试站的一台6兆瓦原型海上风力发电系统上。当风力涡轮机开始运行的时候,其叶片覆盖范围可达18,600平方米,面积相当于两个半足球场的大小。叶片尖端移动速度达80米每秒,即290公里每小时。
整个B75叶片的制作一气呵成,将强化玻璃纤维环氧树脂和巴沙木倒入模具中,在叶片形成过程中既没有连接缝隙也没有粘合接头,并且非常坚固。154米长的巨型转子必须能够承受巨大空气团的冲击,因为在每秒10米的风速下空气能量将达到每秒200吨。
This is a picture of a truly gargantuan, 75-meter-long Siemens B75 wind turbine rotor blades. It consist of a ponent made from epoxy resin and balsa reinforced with glass fiber, cast in this gigantic mold [source, read more: 网页链接]
Chinese astronauts reach new space station for 3-month mission
a Falconer
Thu, June 17, 2021, 11:44 PM·1 min read
Three astronauts entered China's new space station for the first time after riding into space on the Shenzhou-12 spacecraft launched from the edge of the Gobi Desert on Thursday, ording to AP.
Why it matters: Astronauts Nie Haisheng, Liu Boming and Tang Hongbo are set to upy the station for a three-month mission, marking the country's longest crewed space mission ever and the first in almost five years.
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It also marks another significant step in the Chinese Communist Party's space program, which is seen as a potential rival to the
U.S.
Details: The Shenzhou-12 was launched from Jiuquan Satellite Launch Center in Jiuquan, Gansu province, China, a Long March 2F rocket.
The big picture: This is the third of 11 missions needed plete the construction of the permanent space station, the ponent of which was launched into orbit in April.
China's government is excluded from the International Space Station program — the only other space station in orbit.
What's next: The astronauts' main goal is to bring into service the ponent of the station, the Tianhe module, Cmdr. Nie said, per the BBC.
"We need to set up our new home in space and test a series of new technologies," Nie said ahead of the Shenzhou-12 launch.
"I believe with the three of us working closely together, doing thorough and urate operations, we can e our challenges. We have the confidence plete the mission.&39;s note: This article has been updated with new details throughout.
3. 一位专家表示,尽管今年外部条件的变化可能带来挑战,但对外贸易仍然是中国发展的重要组成部分。并补充说,最近关于推动边境和跨境经济合作区发展的通知将在优化国家贸易和经济结构方面发挥重要作用。
Despite potential challenges from evolving external conditions this year, foreign trade remains a ponent of China's development, an expert said, adding that a recent circular on boosting the development of border and cross-border economic cooperation zones will play a big role in optimizing the country's trade and economic structure.
BingOl陨石(宾格尔~目击灶神星陨石)
(玻璃质熔壳,熔流线等特征完美)
国际命名:BingOl
坠落时间:2015年
坠落地:土耳其宾格尔省
发现总重量:15.24公斤
分类:Howardite
这是353颗被归为Howardite的核准陨石中的1颗。
2015年9月2日20:10:30在土耳其本戈勒省看到和听到一个明亮的弧线,并在几个视频安全摄像机上录制。在火球爆炸后不久,在Saricek村的房屋上听到了小陨石的声音。第二天早上,人们在街上和院子里发现了豌豆大小的陨石.必应尔警方的tuğe zduan提供了来自邻近城市Bitlis的交通摄像头的第一批视频数据。Iskender Demirkol、Ibrahim牙生Erdoğan、Aydın SüKrüBengü和Vedat Avci进行了专门搜索。
这顆 克陨石是在9月4日上午由Sari iek的Mehmet Nezir Ergün发现的。
物理特征:(奥恩萨拉,Uist;P.juniskens,SETI):陨石完全结壳,有光亮的浅棕色外壳。该形状不规则和圆形,表明高海拔碎裂和正在进行的分裂,直到减速。
岩石学:(
M.Zolensky,JSC):岩石学上的非均质岩石,由岩石和矿物碎屑组成,由细粒碎屑组成。基体由高钙辉石(可能是单斜辉石)、低钙辉石(可能是斜方辉石)、二原岩组分、斜长石、硅、钾长石、闪锌矿、铬铁矿、钛铁矿和稀有橄榄石组成。克林诺和邻位吡咯烷酮的含量大致相等。单矿物颗粒和斜方辉石、单斜辉石、斜长石和稀有橄榄石,均最大尺寸为1毫米。单斜辉石晶体中常含有邻位辉石的外溶层,其中两相均含有取向的铬铁矿包裹体。岩石碎屑有三种类型:
(1)斜长石和石英,前者含铬铁矿和钛铁矿包裹体,后者含斜长石泡;
(2)斜长石和石英共生体组成的碎屑,两相均有较大的斜长石泡;
(3)斜长石车床和分带斜辉石共生的蛇绿岩玄武岩。欧氏物质似乎比异生组分更丰富。单矿物颗粒和碎屑表现出不同程度的冲击变形,包括不规则的断裂和折叠的辉石片层,而细晶基体中的很大一部分似乎是较差的结晶。在熔合结壳附近,已将熔融的斜长石注入硅酸盐中的裂纹中。Geochemistry:(
M.Zolensky,JSC):The matrix consists of high-Ca pyroxene(probably clinopyroxene)Fs50±18Wo26±20,FeO/MnO=21.0-45.9,N=29,from the ponent,low-Ca pyroxene(probably orthopyroxene)with Fs28±6Wo2±
1,FeO/MnO=31.1-36.7,n=23 from the ponent and Fs53±19Wo3±3;plagioclase,An83.5-89.6Or0.2-4.0;olivine,Fa18-21,FeO/MnO=30.1-43.1,average Fa80,PMD=1.6%,N=
4.单矿物颗粒和碎屑:斜方辉石,Fs22-70Wo1-2;单斜辉石,Fs28-60Wo6-36,一些分带;斜长石,An85.5-89.6or0.2-0.6;橄榄石,Fa21。玄武岩碎屑:斜长石,An85or1;单斜辉石,Fs33-55Wo6-12。
在宾戈尔大学(Iskender Demirkol)收集了少量陨石。
Sari i ek日期:2015年9月2日
坐标纬度:北纬38°54.10‘东经40°36.01’
风化级:低
背景知识:HED族无球粒陨石由三种不同类型的陨石组成:古铜钙长无球粒陨石Howardite、钙长辉长无球粒陨石 Eucrite、紫苏辉石无球粒陨石Diogenite.
通过对太阳系第四号小行星---灶神星的光谱分析,并对比HED族无球粒陨石的岩石学成分,科学界普遍认同HED族无球粒陨石是灶神星破裂后的碎片。
2015年9月2日 目击坠落土耳其宾格尔市。
做客户的生意,需要签署这样的协议。现在有多少企业无奈被迫签署,不签就没生意公司运行不下去,签了违背家国情怀,我该怎么办?
(Vendor Name)
(Address)
(Vendor Logo)
“The
U.S. Federal Acquisition Regulation ( “FAR Rule” ) implementing section 889 (a)
(1)(B) of the John
S. McCain National Defense Authorization Act for Fiscal Year 2019 ( “NDAA” ) is published and goes into effect on August 13, 2020.
The FAR Rule covers certain munications equipment and services produced or provided by Huawei Technologies Company or ZTE Corporation (or any subsidiary or affiliate of those entities) and certain video surveillance products or munications equipment and services produced or provided by Hytera Communication Corporation, Hangzhou Hikvision Digital Technology Company, or Dahua Technology Company (or any subsidiary or affiliate of those entities). The FAR Rule is not limited to contracting with entities that use end-products by panies; it also covers the use of any equipment, system, or service that uses covered munications equipment or services as a substantial or ponent of any system, or as critical technology as part of any system.
(Vendor Name) acknowledges and understands the FAR Rule and hereby certifies that all Original Equipment Manufacturer (OEM) products and Original Design Manufacturer (ODM) products manufactured for or provided on behalf of Leancode Inc. DBA Plugable Technologies do not contain or use any technology and substantial or ponent from Huawei Technologies Company, ZTE Corporation, Hytera Communication Corporation, Hangzhou Hikvision Digital Technology Company or Dahua Technology Company or their affiliates ( “Huawei, et al.” )
(Vendor Name)
____________________________
(Title)
(Name)
清华大学《自然·通讯》 在解释压电-摩擦电复合信号起源和解耦方面取得新进展
接触起电(CE)作为一种普遍的自然现象,可以在处于不同物理状态(固体、液体和气体)的任何材料之间发生。此前,有研究证实CE能以多种运动形式发生在压电纳米发电机(PENG)中,包括界面剪切摩擦、纳米填料滑移、预先存在的静电荷和接触摩擦。接触物体和压电器件产生的摩擦电信号可能很强,从而使得压电器件的输出中含有较大比例的摩擦电成分。然而,以往很多工作忽略了这部分摩擦电信号的贡献,将压电器件的输出视为单一的压电信号,导致其性能可能被夸大。此前,由于缺乏可靠的方法来区分压电信号和摩擦电信号,阻碍了人们揭示复合信号的起源过程,从而导致无法正确分析摩擦电信号的影响和评估压电效应的真实贡献。最终,压电材料的性能可能得到错误评价。因此,开发一种从压电信号中识别和提取压电分量的方法对于定量评估压电材料的性能尤为重要。
近日,清华大学深圳国际研究生院杨诚副教授与中国科学院北京纳米能源与系统研究所王中林院士合作,提出了一种从摩擦电-压电复合信号中分离压电信号的方法,实现了对压电材料性能的准确评估。
研究人员以常见的商用PVDF压电器件为模型对象,发现混合输出中的摩擦电信号所占比例较大,对器件压电性能的评估影响较大。该文创新地引入器件的受力-时间曲线作为解耦摩擦电信号和压电信号的手段,可完整分离出压电信号和摩擦电信号各自的分量。通过比较力-时间和电信号曲线发现,在器件与物体接触前后,记录的电信号属于摩擦电贡献,而相互接触之后得到的电信号则归因于压电效应。此外,作者成功地从混合信号输出中定量提取出了压电电荷转移并计算出有效压电系数(d33),该结果与其他方法测量的结果一致。因此,通过引入器件的受力曲线,我们可以清晰地分离混合信号,且精度仅取决于力信号和电信号的分辨率。这项工作提供了一种在实际测量中阐明真实压电性能的有效方法,这对于公平且正确地评估压电材料至关重要。同时,该工作阐明了摩擦电信号和压电信号的耦合方式,为科学地设计和分析摩擦电-压电纳米发电机提供了理论支撑。
图
1.SE-TENG和PENG同时存在于压电器件的使用过程,但二者产生的信号在时间上存在差异
图
2.在压缩测试中验证 SE-TENG
图
3.利用加载力信号区分单一摩擦电信号和单一压电信号
图
4.PVDF基器件在负极化方向上产生的摩擦电-压电混合输出
图
5.通过从混合输出中提取压电电荷转移来评估 PVDF 薄膜的压电性能
该工作近期以“一种从接收到的‘压电’信号中定量分离压电分量的方法”(A method for quantitatively separating the ponent from the as-received “Piezoelectric” signal)为题发表在《自然·通讯》(Nature Communications)期刊上。
论文链接:
https:///articles/s41467-022-29087-w
成年人的安全感是一个身份认同和心理状态,其中经济稳定是构成安全感的重要成分之
一,这一点确实有很大程度上要依赖金钱的支撑。
The sense of security in adults is an identity and psychological state, and economic stability is an ponent of security, which indeed relies heavily on financial support.
稳定的经济收入可以使一个人不必为生活所担忧,能够保持良好的心态和精神状态。
A stable economic e can help a person avoid worrying about their life and maintain a good mindset and mental state.
经济支持可以帮助一个人摆脱贫困和生活上的困境,令人们不必被许多日常琐事所束缚。
Economic support can help a person e poverty and life difficulties, freeing them from being bound by many daily chores.
有足够的财富可以使人们获得更多的选择机会,更加容易实现自己的人生目标。
Having enough wealth can provide people with more choices and make it easier to achieve their life goals.
工作机会,教育机会,旅游、娱乐等机会都需要金钱的支持,具备充足的经济财富可以让人更加容易地享受这些机会。
Job opportunities, educational opportunities, tourism, entertainment and other opportunities all require financial support, and having sufficient economic wealth can make it easier for people to enjoy these opportunities.
拥有足够的经济和金融资源可以让人从容应对各种不确定性和风险。
Having sufficient economic and financial resources allows people to calmly cope with various uncertainties and risks.
当突如其来的重大事件或个人健康问题出现时,一个经济稳定的人会更容易找到应对之策。
When sudden major events or personal health issues arise, an economically stable person will be more likely to find solutions.
虽然金钱不能解决所有问题,但是它确实是一种实现安全感的重要工具。
Although money cannot solve all problems, it is indeed an important tool for achieving a sense of security.
拥有稳定可靠的财富支持,可以让成年人无忧无虑地面对各种人生挑战,更加从容潇洒地享受生活。
Having stable and reliable financial support can enable adults to face various life challenges without worry and enjoy life more leisurely and unrestrained.