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Bigflow: A General Optimization Layer for Distributed Computing Frameworks

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Journal of Computer Science & Technology 2020年第2期35卷 453-467页

作者： Yun-Cong Zhang xiao-Yang Wang Cong Wang Yao Xu Jian-Wei Zhang xiao-dong lin Guang-Yu Sun Gong-lin Zheng Shan-Hui Yin Xian-Jin Ye Li Li Zhan Song dong-dong Miao Baidu Inc. Beijing 100193China Center for Energy-Efficient Computing and Applications Peking UniversityBeijing 100871China

As data volumes grow rapidly, distributed computations are widely employed in data-centers to provide cheap and efficient methods to process large-scale parallel datasets. Various computation models have been proposed to improve the abstraction of distributed datasets and hide the details of parallelism. However, most of them follow the single-layer partitioning method, which limits developers to express a multi-level partitioning operation succinctly. To overcome the problem, we present the NDD (Nested Distributed Dataset) data model. It is a more compact and expressive extension of Spark RDD (Resilient Distributed Dataset), in order to remove the burden on developers to manually write the logic for multi-level partitioning cases. Base on the NDD model, we develop an open-source framework called Bigflow, which serves as an optimization layer over computation engines from most widely used processing frameworks. With the help of Bigflow, some advanced optimization techniques, which may only be applied by experienced programmers manually, are enabled automatically in a distributed data processing job. Currently, Bigflow is processing about 3 PB data volumes daily in the data-centers of Baidu. According to customer experience, it can significantly save code length and improve performance over the intuitive programming style.

关键词： distributed computing programming model optimization technique

Successful endoscopic hemoclipping of massive lower gastrointestinal bleeding from paratyphoid A fever

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World Journal of Gastroenterology 2015年第3期21卷 1040-1043页

作者： Hui Wang xiao-lin dong xiao-Ming Yu Kyu Sung Chung Jian-Peng Gao Department of Gastroenterology The Affiliated Yan An Hospital of Kunming Medical University

Paratyphoid fever can be complicated by massive lower gastrointestinal bleeding with ileocolonic ulcerations,which are commonly localized using *** most common manifestations include multiple,variablesized,round or oval-shaped,punched-out ***,massive lower gastrointestinal bleeding can occur from erosion of blood *** present arare case of severe lower gastrointestinal bleeding due to paratyphoid A fever that was successfully controlled with hemoclippings.A 30-year-old man experienced high fever and hematochezia whose blood culture showed Salmonella paratyphi A.A complete colonoscopy was successfully performed up to the level of the terminal ileum,which showed multiple,shallow,ulcerated lesions over the entire terminal ileum.A bleeding vessel was seen in one of the ulcers,with overlaying blood *** hemostasis was successfully performed with four pieces of endoclip and without immediate *** report highlights the use of colonoscopy and endoscopic therapy with endoclips for lower gastrointestinal bleeding,which should be considered before surgery.

关键词： Endoscopic hemoclipping hemostasis Lower gastroint

Local injection therapy for hepatocellular carcinoma

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Hepatobiliary & Pancreatic Diseases International 2006年第1期5卷 16-21页

作者： xiao-dong lin and Li-Wu lin Department of Ultrasound, Union Hospital of Fujian Medical University, Fuzhou 350001, China Department of Ultrasound Union Hospital of Fujian Medical University Fuzhou 350001 China.

BACKGROUND: Hepatocellular carcinoma (HCC) is one of the most common malignant tumors in the world and ranks the third most common cause of cancer-related death. Surgical resection, liver transplantation and percutaneous ablation are generally considered the only curative treatment for early stage HCC. Besides the limitations of insufficient organ donors and a long waiting time for liver transplantation, however, resection is applied only to patients with good hepatic reserve and localized tumors, with a resectability of 30%. DATA SOURCES: Local ablation therapy, which is minimally invasive but contributes to the significant improvement of survival in patients with unresectable tumor, hasbeen widely used in treating small HCC. Among the techniques of local therapy, percutaneous ethanol injection (PEI) with a complete response in 80% of HCCs less than 3 cm has been accepted as an alternative to surgery in patients with small HCC. Moreover, percutaneous hepatic quantified ethanol injection (PHQEI) or PEI according to the standard criteria has been confirmed to benefit patients with HCC, especially when quantified ethanol is given at a short interval (QESI, the interval was 2-3 days). RESULT: Several limitations related to local percutaneous methods may result in incomplete therapeutic effect in case of larger HCC nodules (>3 cm). CONCLUSION: The combined use of different methods according to the clinical status of patients or tumors may be essential to the effective treatment of HCC.

关键词： carcinoma, hepatocellular radical therapy percutaneous ablation percutaneous ethanol injection percutaneous acetic acid injection

Inclusion Property and Molecular Modeling of Calix[4]arene Derivatives

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Wuhan University Journal of Natural Sciences 1999年第4期4卷 463-468页

作者： YU xiao dong, lin lin, HAN Hui ming, WU Cai ying  College of Chemistry and Environmental Science, Wuhan University, Wuhan 430072, China Wuhan University College of Chemistry and Environmental Science Wuhan China (GRID:grid.49470.3e) (ISNI:***)

The inclusion properties of two calix[4]arene derivatives 5,11,17,23 tetra tert butyl 25, 27 bis (isopropyl carbamoyl methoxy) 26,28 diundecenyloxy calix[4]arene (C[4]A) and 25,27 dibutoxy 5,11,17,23 tetra tert butyl 26,28 diundecenyloxy calix[4]arene (C[4]B) were studied by gas chromatographic method. It was found that C[4]A could form inclusion complexes with benzene, toluene, methanol and ethanol while C[4]B could only form inclusion complex with methanol, which might be due to the different conformations of C[4]A and C[4]B. Molecular modeling showed that CH/π and OH/π interactions played important roles in the forming of inclusion complexes.

关键词： calixarene gas chromatography molecular modeling inclusion interaction

Removal of a large foreign body in the rectosigmoid colon by colonoscopy using gastrolith forceps

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World Journal of Clinical Cases 2016年第5期4卷 135-137页

作者： xiao-dong lin Guang-Yao Wu Song-Hu Li Zong-Quan Wen Fu Zhang Shao-Ping Yu Department of Gastro-enterology Dongguan Kanghua Hospital

Rectal foreign bodies are man-made injury that occurs *** management depends on its depth and the consequence it *** here report a case of rectal foreign body(a glass bottle measuring about 38 mm×75 mm)which was located 13-15 cm from the *** patient had no sign of perforation,and we managed to remove it using endoscopy with gastrolith forceps.

关键词： Foreign body Rectosigmoid Endoscopy Removal Gastrolith forceps

Application of blunt dissection in ESD of a gastric submucosal tumor

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World Journal of Gastroenterology 2014年第21期20卷 6698-6700页

作者： Zong-Quan Wen Guang-Yao Wu Shao-Ping Yu xiao-dong lin Song-Hu Li Xian-Guang Huang Fu Zhang xiao-Yu Zeng Hai-Yan Huang Ai-Mei Li Department of Gastroenterology Dongguan Kanghua Hospital Department of Endoscopy Centre Dongguan Kanghua Hospital

We performed endoscopic submucosal dissection of a gastric fundus *** was difficult to strip the tumor completely due to space limitation,and we used blunt dissection to remove the tumor quickly and ***,the basal area of the 2.5 cm submucosal tumor located in the gastric fundus was cut open,and the mucosa was *** tumor was difficult to peel,therefore,a snare was used and the tumor was pulled and tightened *** electronic coagulation was used during the *** tumor was then bluntly *** method ensured rapid and complete removal of the tumor.

关键词： Blunt dissection Endoscopic submucosal dissection Gastric fundus submucosal tumor

Percutaneous intratumoral injection of traditional Chinese herbal compound medicine Star-99 in treatment of hepatocellular carcinoma of mice

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Hepatobiliary & Pancreatic Diseases International 2004年第1期3卷 49-54页

作者： Li-Wu lin Yan Sun Yi-Mi He Shang-Da Gao En-Sheng Xue xiao-dong lin Li-Yun Yu Xiu-Fang lin Ying-Hong Yang Department of Ultrasound Union Hospital Fujian Medical University Fuzhou 350001 China. sunyan710@***

BACKGROUND: Unresectable hepatocellular carcinoma (HCC) lacks effective therapy and entails very poor progress. In 1991, we found that Chinese herbal compound Star-99 has potentially effect on HCC. The purpose of this study was to probe the anti-cancer effect and the mechanism of focal injection of Chinese herbal compound Star-99 into HCC of mice.METHODS: In 32 nude mice transplanted with human hepatocellular carcinoma SMMC-7721, 16 received hypodermic implant and the other 16 orthotopic liver transplant. They were randomly divided into three groups: Star-99 group (Chinese herbal compound, 16 mice), alcohol group (8) and saline group (8), respectively. Intratumoral injection of Star-99, alcohol and saline was carried out 10 days after transplantation of HCC. Twenty days after the first injection, the nude mice were killed after being injected every 5 days with a total of 4 injections in each mouse. Tumor tissues were examined pathologically or via an electron microscope and flow cytometrical (FCM) DNA analysis. The three diameters of the tumor were measured with high-frequency ultrasound before and after injection, and the growth index was calculated with the following formula: volume of tumor (after treatment-before treatment)/volume of tumor (before treatment). Double-blind method was applied in the experiment.RESULTS: The growth index of the Star-99 group (0.068+/-0.022) and the alcohol group (0.079+/-0.024) was markedly lower than that of the saline group (4.345+/-1.453, Plined in mass could also be seen in the group (14/16). FCM DNA analysis showed that the rate of apoptosis in the Star-9

关键词： hepatocellular carcinoma intratumoral injection Chinese herbal medicine

Lower gastrointestinal tract bleeding caused by dieulafoylike lesion synchronous meckel diverticulum: A rare case report

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World Journal of Clinical Cases 2015年第11期3卷 970-972页

作者： Song-Hu Li Guang-Yao Wu xiao-dong lin Zong-Quan Wen Mei-Ting Huang Shao-Ping Yu Hao Zhang Department of Gastroenterology Dongguan Kanghua Hospital Department of General Surgery Dongguan Kanghua Hospital

Meckel diverticulum is an embryonic remnant of the Gastrointestinal duct which causes symptoms < 5% in the 2% population. Painless bleeding and abdominal pain are the most often reported symptoms. Dieulafoy lesion/dieulafoy-like lesion often cause upper gastrointestinal(GI) tract bleeding, but massive lower gastrointestinal bleeding is rare. We reported a 19-year-old male presented massive lower GI tract bleeding caused by Meckel diverticulum synchronous dieulafoy-like lesion.

关键词： Lower gastrointestinal tract Bleeding Dieulafoy-like lesion Meckel diverticulum Endoscopy

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基于随机集理论的模糊观测多目标跟踪方法

系统工程理论与实践 2013年第7期33卷 1873-1879页

作者：林晓东朱林户吴琳琳张晓丰空军工程大学工程学院西安710038 空军工程大学理学院西安710051

为解决传感器观测数据具有不确定性和模糊性的多目标跟踪问题,首先给出了模糊观测的随机子集表示及其似然函数构造方法:然后利用所构造的似然函数,并结合概率假设密度(PHD)滤波器来实现模糊观测的多目标跟踪.仿真结果显示,标准PHD滤波... 详细信息

为解决传感器观测数据具有不确定性和模糊性的多目标跟踪问题,首先给出了模糊观测的随机子集表示及其似然函数构造方法:然后利用所构造的似然函数,并结合概率假设密度(PHD)滤波器来实现模糊观测的多目标跟踪.仿真结果显示,标准PHD滤波器在模糊观测下会出现目标数目估计不准确的问题.针对这一问题,在分析了该问题产生原因的基础上,通过改进PHD滤波器的更新过程,提出了一种单量测独立更新的PHD滤波方法.仿真结果表明,在模糊观测下,改进算法能得到比标准PHD滤波方法更准确的目标数目估计和更高的跟踪精度.

关键词：多目标跟踪模糊观测有限集统计理论概率假设密度滤波粒子滤波