并行分治计算中的一种Work-stealing策略

在机群尤其是共享式多用户机群环境中提高非规则问题的并行计算效率是一项具有挑战性的工作.给出了一种适于多核处理器节点构成的机群的层次Work-stealing负载均衡策略(简称HWS),它能够有效利用节点的动态变化的可用计算资源.分析了分治计算问题中的动态性与非规则性,并使用HWS策略对分治计算问题进行了动态负载均衡(DLB)实验.实验表明,HWS在加速比、CPU利用率和负载分布等性能指标上均优于Work-sharing和Satin-CRS策略.

构式语法框架下英汉Steal和“偷”的对比分析

本文首先分析英汉steal和“偷”的语义、语法特征和搭配方面的要求,发现这两个词在这些方面有许多相似点,存在不少差异。其次分析它们形成的构式:双及物构式、及物构式和不及物构式。它们的双及物构式的构式义不同,及物构式和不及物构式的构式义相同。双及物构式是原始构式,其他两种构式由于受到语用压制和突显压制从双及物构式演变过来。及物构式和不及物构式会对进入构式的双及物动词的论元结构产生压制,迫使其减少其后的一个论元或删除其后的两个论元。

Steal one's thunder,偷了某人的雷声?

steal one’s thunder乍看不太合乎逻辑,thunder(雷声)怎么能会被steal(偷)呢?其实这是一条英国的成语。它的历史十分悠久。现在这条成语在英国及美国使用得都很普遍。它表达的含义为:spoil one’s attempt to impress byanticipating him,detracting from what he is say-ing,doing,etc.汉语就是“趁人不备,捷足先登,抢在某人之前或贬低某人的言行使之不受他人注意”。

New strategies for prevention and treatment of splenic artery steal syndrome after liver transplantation

AIM: To explore a prophylactic procedure to prevent splenic artery steal syndrome (SASS), as well as a therapeutic intervention to correct it.

A rare case of non-ST-segment elevation myocardial infarction triggered by coronary subclavian steal syndrome

Coronary subclavian steal syndrome (CSSS) has been recognized lately as an unusual clinical entity,giving rise to angina but rarely causing an acute coronary syndrome (ACS). The prerequisites for the appearance of CSSS are both a patent left internal mammary artery (LIMA) graft and severe stenosis of the left subclavian artery (LSA). However,LSA is often overlooked in the diagnostic evaluation of patients with angina,who have underwent coronary artery bypass grafting (CABG). We report an unusual case of non-ST-segment elevation myocardial infarction (NSTEMI) caused by subtotal occlusion of proximal LSA.

Interventional treatment of the left subclavian in 2 patients with coronary steal syndrome

In patients with history of coronary artery disease angina pectoris is usually attributed to the progression of atherosclerotic lesions. However,in patients with previous coronary artery bypass graft operation(CABG) using internal mammary artery grafts,great vessel disease should also be considered. Herein we present two patients with history of CABG whose symptoms were suspicious for coronary ischemia. During cardiac catheterization reverse blood flow was observed from the left artery disease to the left internal mammary artery(LIMA) graft in both cases. After angioplasty and stent implantation of the left subclavian artery antegrade flow was restored in the LIMA grafts and both patients had complete resolution of symptoms.

Bilateral common carotid artery common trunk with aberrant right subclavian artery combined with right subclavian steal syndrome: A case report

BACKGROUND We report a rare case of numbness in the right hand,finally diagnosed as bilateral common carotid artery common trunk with aberrant right subclavian artery combined with right subclavian steal syndrome and explain the cause of these diseases.CASE SUMMARY The patient was a 65-year-old woman.She complained of dizziness,numbness and weakness of the right hand for 6 mo.She was diagnosed with bilateral common carotid artery common trunk with aberrant right subclavian artery combined with right subclavian steal syndrome by ultrasound,enhanced computed tomography,computed tomography angiography and other examinations.Considering the surgical risks,the patient refused the aberrant right subclavian artery stent implantation and was discharged.We hypothesize that these two kinds of deformity and right subclavian steal syndrome may not occur by accident and result from multiple malformations.CONCLUSION Bilateral common carotid artery common trunk with aberrant right subclavian artery combined with right subclavian steal syndrome is rare.This case reminds interventional radiologists of the possibility of these abnormalities before surgery.

A case of acquired right-sided subclavian steal syndrome successfully treated with stenting using brachial approach

Subclavian steal syndrome (SSS) is defined as a group of symptoms that arise from reversed blood flow in the ipsilateral vertebral artery. It is the consequence of proximal occlusion or high-grade stenosis of the subclavian artery. The subclavian obstructive lesions are mostly located in the proximal segment of the subclavian artery and predominantly on the left side. In contrast, there are only a small number of patients that present with right-sided symptoms and even fewer with bilateral symptoms. Endovascular therapy of occlusions and high-grade stenosis of subclavian artery proximal to the origin of the vertebral artery becomes an established therapy in last two decades. We report a case of successful endovascular treatment of right-sided subclavian steal and high-grade (80%) right subclavian artery stenosis due to atherosclerotic occlusive disease with balloon-expandable stent using brachial approach.

Unusual presentation of granulomatosis with polyangiitis causing periaortitis and consequent subclavian steal syndrome:A case report

BACKGROUND Granulomatosis with polyangiitis(GPA)is a rare autoimmune disease that involves small-to-medium-sized vessels and forms necrotizing vasculitis with granulomatous inflammation.The formation of a large vessel lesion in GPA patients has been scarcely reported,and it can cause confusion in the diagnosis.CASE SUMMARY A 27-year-old man presented with mild left-sided pleuritic chest pain that started one year prior.An imaging study revealed up to 2.5 cm-sized two irregular nodular consolidation nodule in the left lower lobe.Both nodules showed central necrosis.Also,there was a periaortic mass occluding the branching porting of the subclavian artery.He had positive anti-neutrophil cytoplasmic antibodies(ANCAs),but myeloperoxidase-ANCAs and proteinase 3-ANCAs were negative.The patient also developed symptoms of subclavian vein syndrome during the follow-up.Wedge resection of the lung revealed necrotizing vasculitis,destructive parenchymal abscess and surrounding granuloma,and therefore diagnosed of GPA.The patient started on methotrexate and steroid therapy with a relief of symptomatic.CONCLUSION Here,we present an unusual manifestation of GPA with periaortitis and consequent subclavian steal syndrome,which has never been previously described.This case alerts us that we should include GPA in the differential diagnosis of large vessel vasculitis as well as subclavian steal syndrome.

Subclavian steal syndrome associated with Sjogren's syndrome: A case report

BACKGROUND Subclavian steal syndrome(SSS)caused by Sjogren's syndrome is rare,especially for elderly patients with risk factors for atherosclerosis.The current report presents the uncommon etiology and treatment of SSS,aiming to improve doctor’s clinical experience.CASE SUMMARY A 69-year-old man was diagnosed with hypertension and acute cerebral infarction presenting with left upper limb weakness and pain even gradually aggravating to left limb hemiplegia 30 years ago.He was managed with antihypertensive and antithrombotic therapy;however,his condition was recurrent,and he never had any further examination.It was found that the difference of the bilateral upper arm systolic pressure was over 20 mmHg,and Doppler examination showed that the blood flow of the left vertebral artery was reversed,suggesting SSS.Further tests revealed a benign lymphoepithelial lesion in salivary gland tissue,confirming the Sjogren's syndrome.CONCLUSION The patient was found to have hypertension when he was 33 years old,and the blood pressure of both sides was asymmetric,which was ignored.The patient's symptoms of dizziness and upper limb weakness were misdiagnosed as general cerebral infarction.It is necessary to test the aorta computed tomography angiography to prove secondary hypertension factors such as Sjogren's syndrome.

Study of Denoising in the Electricity Anti-Stealing Detection Based on VMD-WTD Combination

In order to solve the failure of electricity anti-stealing detection device triggered by the noise mixed in high-frequency electricity stealing signals,a denoising method based on variational mode decomposition(VMD)and wavelet threshold denoising(WTD)was applied to extract the effective high-frequency electricity stealing signals.First,the signal polluted by noise was pre-decomposed using the VMD algorithm,the instantaneous frequency means of each pre-decomposed components was analyzed,so as to determine the optimal K value.The optimal K value was used to decompose the polluted signal into K intrinsic mode components,and the sensitive mode components were determined through the cross-correlation function.Next,each sensitive mode was reconstructed.Finally,the reconstructed signal denoised using the wavelet threshold to obtain the denoised signal.The simulation analysis and experimental results show that the proposed method is superior to the traditional VMD method,FFT method and EMD method,as it can effectively eliminate the noise and enhance the reliability of high-frequency electricity stealing signal detection.

Hemodynamic evaluation of contralateral vertebral artery in patients with subclavian steal syndrome by carotid ultrasound

Objective:To investigate the ultrasonographic characteristics of the hemodynamic changes of the contralateral vertebral artery(VA)in patients with different types of subclavian steal syndrome(SSS).Methods:A total of 152 cases of SSS diagnosed by carotid Doppler ultrasonography(CDU)and confirmed by CT angiography(CTA)were enrolled as the study group.The 152 cases of SSS were divided into type Ⅰ(47 cases of occult steal blood),type Ⅱ(60 cases of partial steal blood)and type Ⅲ(45 cases of complete steal blood).Meanwhile,46 cases of cardiovascular and cerebrovascular diseases were excluded from the health examination center as the control group.The diameter and hemodynamic changes of VA in healthy side of patients with different types of steal blood were analyzed and compared with the control group.Results:The hemodynamic parameters of VA on the contralateral side of three types of SSS in the study group were compared with those in the control group,there was no significant difference between type Ⅰ and the control group(P>0.05),and there was significant difference between type Ⅱ and type Ⅲ and the control group(P<0.05);The diameter and hemodynamic parameters of VA increased with the severity of steal blood(P<0.05).Conclusion:CDU examination of VA hemodynamic parameters in healthy side of SSS patients can be used to preliminarily evaluate SA lesions and VA-VA steal pathway.

Steal the Show

Someone stealing the show takes all the attention away fromall important actor or actress in a play;or he gets more noticethan a prominent personality at an event such as a party,a meet-ing.or other event.Here is Lucy to explain something that hap-pened tO her:“I was giving a perfectly wonderful

Coronary subclavian steal syndrome

Coronary subclavian steal syndrome arises when a stenosis of the subclavian artery results in reduced antegrade or retrograde flow in an internal mammary artery with resultant coronary ischemia.……

steal one's thunder的来源

英国17世纪大戏剧家约翰·丹尼生对英国戏剧的背景、道具作了许多大胆的探索和创新。他首次在自己的剧本Appius and Vinginia中使用了雷声这种戏剧音响手段。遗憾的是,这个剧不受观众欢迎,丹尼生为此收回了这个剧本。然而事隔不久莎士比亚的戏剧Macbeth (《麦克白》)演出时使用了雷声轰鸣这种音响形式,丹尼生听后呼喊道:“My God.The villains will play my thunder but notmy plays.”(天啊,这些小人们不上演我的戏剧却演出了我的雷声。)

妙手神STEAL

加时赛还剩3.9秒,艾弗森将对手海耶斯在本方半场的传球截下,带球飞奔了大半个球场,在终场哨音响起的一刹那上篮得手,116比114,76人主场惊险战胜奇才。这不禁让我们想起那句老话:明枪易躲,暗箭难防。 抢断,可谓是暗箭。它没有运球的变幻莫测,没有助攻的超脱灵异,更没有扣篮的扣人心悬,而他却鬼使神差般的将胜利的凯歌在他人的上方奏起。抢断,不是每场比赛的必然精彩,但他的出现必然一片哗然。

How did Mike steal a TV?

1.One day the detective Jerry received a telephone from his sister Helen. Helen told him she bought a new car and a new TV. But her new TV was stolen.

An Analysis of the Abuse of Power within Ancient China＇s Power System--Based on the Case of ＂Soul-stealing＂of the Qing Dynasty

In the year of 1768,the country was sent into a nation wide panic by a sorcery case named"soul stealing"in China,to which the emperor,officials and civilians at that time all responded differently.Based on the"soul stealing"case,this paper gives an analysis of the political environment and the bureaucratic system to explore the motives driven by power involved in the proceedings of the case,and in doing so the paper attempts to provide insights into the implications of the ancient power system that makes possible the abuse of authority.

FMSA:a meta-learning framework-based fast model stealing attack technique against intelligent network intrusion detection systems

Intrusion detection systems are increasingly using machine learning.While machine learning has shown excellent performance in identifying malicious traffic,it may increase the risk of privacy leakage.This paper focuses on imple-menting a model stealing attack on intrusion detection systems.Existing model stealing attacks are hard to imple-ment in practical network environments,as they either need private data of the victim dataset or frequent access to the victim model.In this paper,we propose a novel solution called Fast Model Stealing Attack(FMSA)to address the problem in the field of model stealing attacks.We also highlight the risks of using ML-NIDS in network security.First,meta-learning frameworks are introduced into the model stealing algorithm to clone the victim model in a black-box state.Then,the number of accesses to the target model is used as an optimization term,resulting in minimal queries to achieve model stealing.Finally,adversarial training is used to simulate the data distribution of the target model and achieve the recovery of privacy data.Through experiments on multiple public datasets,compared to existing state-of-the-art algorithms,FMSA reduces the number of accesses to the target model and improves the accuracy of the clone model on the test dataset to 88.9%and the similarity with the target model to 90.1%.We can demonstrate the successful execution of model stealing attacks on the ML-NIDS system even with protective measures in place to limit the number of anomalous queries.

Subclavian Steal Syndrome: a Report of 25 Cases

F1982 to 1992,25 patients with subclavian steal syndrome were admitted;20 cases had undergone surgery.The etiology inluded atherosclerosis in 14 cases(56%),Takayasu’s disease 9 cases(36%);14 cases was smokers.