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Structural damage detection method based on information fusion technique 被引量:1
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作者 刘涛 李爱群 +1 位作者 丁幼亮 费庆国 《Journal of Southeast University(English Edition)》 EI CAS 2008年第2期201-205,共5页
Multi-source information fusion (MSIF) is imported into structural damage diagnosis methods to improve the validity of damage detection. After the introduction of the basic theory, the function model, classification... Multi-source information fusion (MSIF) is imported into structural damage diagnosis methods to improve the validity of damage detection. After the introduction of the basic theory, the function model, classifications and mathematical methods of MSIF, a structural damage detection method based on MSIF is presented, which is to fuse two or more damage character vectors from different structural damage diagnosis methods on the character-level. In an experiment of concrete plates, modal information is measured and analyzed. The structural damage detection method based on MSIF is taken to localize cracks of concrete plates and it is proved to be effective. Results of damage detection by the method based on MSIF are compared with those from the modal strain energy method and the flexibility method. Damage, which can hardly be detected by using the single damage identification method, can be diagnosed by the damage detection method based on the character-level MSIF technique. Meanwhile multi-location damage can be identified by the method based on MSIF. This method is sensitive to structural damage and different mathematical methods for MSIF have different preconditions and applicabilities for diversified structures. How to choose mathematical methods for MSIF should be discussed in detail in health monitoring systems of actual structures. 展开更多
关键词 multi-source information fusion structural damage detection Bayes method D-S evidence theory
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浅谈信息题基本解法
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作者 薄鲁新 《新疆教育学院学报》 1999年第3期68-72,共5页
信息题是在重视能力的培养形式下,迅速发展起来的一种新颖题型。由于它在考查学生自学能力、理解能力、组织能力、创造能力及运用旧知识解决新知识能力方面的独特作用,因而被历届高考命题委员会所广泛采用。在中学阶段,信息题的教学... 信息题是在重视能力的培养形式下,迅速发展起来的一种新颖题型。由于它在考查学生自学能力、理解能力、组织能力、创造能力及运用旧知识解决新知识能力方面的独特作用,因而被历届高考命题委员会所广泛采用。在中学阶段,信息题的教学是重难点,要让学生准确快速地解决信息题,就必须采取正确方来达到目的,只要采用换元法、断结法就能很好地解决这个问题,取得良好的教学效果。 展开更多
关键词 信息题 换元法 断结法 化学键 顺式加成 反式加成 消去反应
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Leptin levels in the differential diagnosis between benign and malignant ascites 被引量:7
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作者 Mehmet Buyukberber Mehmet Koruk +5 位作者 M Cemil Savas Murat T Gulsen Yavuz Pehlivan Rukiye Deveci Alper Sevinc Serdar Gergerlioglu 《World Journal of Gastroenterology》 SCIE CAS CSCD 2007年第3期398-402,共5页
AIM: To evaluate the role of leptin levels in the differentia diagnosis of ascites. METHODS: Ascitic leptin, TNFα and serum leptin levels were measured in 77 patients with ascites (35 with malignancies, 30 cirrhos... AIM: To evaluate the role of leptin levels in the differentia diagnosis of ascites. METHODS: Ascitic leptin, TNFα and serum leptin levels were measured in 77 patients with ascites (35 with malignancies, 30 cirrhosis and 12 tuberculosis). Control serum samples were obtained from 20 healthy subjects. Leptin and TNFα levels were measured by EUSA. Body mass index (BMI) and percentage of body fat (BFM) by skin fold measurement were calculated for all patients and control groups. Peritoneal biopsy, ascites cytology and cultures or biochemical values were used for the diagnosis of patients. RESULTS: In patients with malignancies, the mean serum and ascites leptin levels and their ratios were significantly decreased compared to the other patient groups and controls. In tuberculosis peritonitis, ascitic fluid TNFα levels were significantly higher than malignant ascites and cirrhotic sterile ascites. BMI and BFM values did not distinguish between patients and controls. CONCLUSION: In patients with malignant ascites, levels of leptin and TNFα were significantly lower than in patients with tuberculous ascites. 展开更多
关键词 Leptin Benign ascites Malignant ascites TUBERCULOSIS CIRRHOSIS
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Diagnosis and management of colonic injuries following blunt trauma 被引量:8
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作者 Yi-Xiong Zheng Li Chen Si-Feng Tao Ping Song Shao-Ming Xu 《World Journal of Gastroenterology》 SCIE CAS CSCD 2007年第4期633-636,共4页
AIM: To retrospectively evaluate the preoperative diagnostic approaches and management of colonic injuries following blunt abdominal trauma. METHODS: A total of 82 patients with colonic injuries caused by blunt trauma... AIM: To retrospectively evaluate the preoperative diagnostic approaches and management of colonic injuries following blunt abdominal trauma. METHODS: A total of 82 patients with colonic injuries caused by blunt trauma between January 1992 and December 2005 were enrolled. Data were collected on clinical presentation, investigations, diagnostic methods, associated injuries, and operative management. Colonic injury-related mortality and abdominal complications were analyzed. RESULTS: Colonic injuries were caused mainly by motor vehicle accidents. Of the 82 patients, 58 (70.3%) had other associated injuries. Laparotomy was performed within 6 h after injury in 69 cases (84.1%), laparoscopy in 3 because of haemodynamic instability. The most commonly injured site was located in the transverse colon. The mean colon injury scale score was 2.8. The degree of faecal contamination was classified as mild in 18 (22.0%), moderate in 42 (51.2%), severe in 14 (17.1%), and unknown in 8 (9.8%) cases. Sixty-seven patients (81.7%) were treated with primary repair or resection and anastomosis. Faecal stream diversion was performed in 15 cases (18.3%). The overall mortality rate was 6.1%. The incidence of colonic injury- related abdominal complications was 20.7%. The only independent predictor of complications was the degree of peritoneal faecal contamination (P = 0.02). CONCLUSION: Colonic injuries following blunt trauma are especially important because of the severity and complexity of associated injuries. A thorough physical examination and a combination of tests can be used to evaluate the indications for laparotomy. One stage management at the time of initial exploration is mostoften used for colonic injuries. 展开更多
关键词 Colonic injuries Blunt trauma Operation Faecal stream diversion Rretrospective study
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Monoclonal immunoscintigraphy for detection of metastasis and recurrence of colorectal cancer 被引量:4
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作者 Vera Artiko Ana Koljevic Markovi +13 位作者 Dragana obi-aranovi Milorad Petrovi Andrija Anti Mirjana Stojkovi Marinko Zuvela Djordjije aranovi Milica Stojkovi Neboja Radovanovi Danijel Galun Aleksandar Milovanovi Jovica Milovanovi Anica Bobi-Radovanovi Zoran Krivokapic Vladimir Obradovi 《World Journal of Gastroenterology》 SCIE CAS CSCD 2011年第19期2424-2430,共7页
AIM:To assess the clinical role of monoclonal immunoscintigraphy for the detection of metastasis and recurrence of colorectal cancer.METHODS:Monoclonal immunoscintigraphy was performed in patients operated on for colo... AIM:To assess the clinical role of monoclonal immunoscintigraphy for the detection of metastasis and recurrence of colorectal cancer.METHODS:Monoclonal immunoscintigraphy was performed in patients operated on for colorectal adenocar-cinoma suspected of local recurrence and metastatic disease.The results were compared with conventional diagnostics.RESULTS:Immunoscintigraphic investigation was done in 53 patients.Tumor recurrence occurred in 38 patients,and was confirmed by other diagnostic modalities in 35.In 15 patients,immunoscintigraphic findings were negative,and confirmed in 14 with other diagnostic methods.Comparative analysis confirmed good correlation of immunoscintigraphic findings and the results of conventional diagnostics and the level of tumor marker carcinoembryonic antigen.Statistical analysis of parameters of radiopharmaceutical groups imacis,indimacis and oncoscint presented homogenous characteristics all of three radiopharmaceuticals.The analysis of immunoscintigraphic target focus was clearly improved using tomography.CONCLUSION:Immunoscintigraphy is highly specific and has a good predictive value in local recurrence of colorectal cancer. 展开更多
关键词 IMMUNOSCINTIGRAPHY Monoclonal antibodies Colorectal carcinoma Tumor metastasis Tumor recurrence
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Endoscopic submucosal dissection for gastrointestinal neoplasms 被引量:95
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作者 Naomi Kakushima Mitsuhiro Fujishiro 《World Journal of Gastroenterology》 SCIE CAS CSCD 2008年第19期2962-2967,共6页
Endoscopic submucosal dissection (ESD) is an advanced technique of therapeutic endoscopy for superficial gastrointestinal neoplasms. Three steps characterize it:injecting fluid into the submucosa to elevate the lesion... Endoscopic submucosal dissection (ESD) is an advanced technique of therapeutic endoscopy for superficial gastrointestinal neoplasms. Three steps characterize it:injecting fluid into the submucosa to elevate the lesion, cutting the surrounding mucosa of the lesion, and dissecting the submucosa beneath the lesion. The ESD technique has rapidly permeated in Japan for treatment of early gastric cancer, due to its excellent results of en- bloc resection compared to endoscopic mucosal resection (EMR). Although there is still room for improvement to lessen its technical difficulty, ESD has recently been applied to esophageal and colorectal neoplasms. Favorable short-term results have been reported, but the application of ESD should be well considered by three aspects:(1) the possibility of nodal metastases of the lesion, (2) technical difficulty such as location, ulceration and operator’s skill, and (3) organ characteristics. 展开更多
关键词 Endoscopic submucosal dissection Gastric cancer Esophageal cancer Colorectal cancer Endoscopic mucosal resection Therapeutic endoscopy
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Autofluorescence excitation-emission matrices for diagnosis of colonic cancer 被引量:12
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作者 Bu-HongLi Shu-SenXie 《World Journal of Gastroenterology》 SCIE CAS CSCD 2005年第25期3931-3934,共4页
AIM: To investigate the autofluorescence spectroscopic differences in normal and adenomatous coionic tissues and to determine the optimal excitation wavelengths for subsequent study and clinical application. METHODS: ... AIM: To investigate the autofluorescence spectroscopic differences in normal and adenomatous coionic tissues and to determine the optimal excitation wavelengths for subsequent study and clinical application. METHODS: Normal and adenomatous coionic tissues were obtained from patients during surgery. A FL/FS920 combined TCSPC spectrofluorimeter and a lifetime spectrometer system were used for fluorescence measurement. Fluorescence excitation wavelengths varying from 260 to 540 nm were used to induce the autofluorescence spectra, and the corresponding emission spectra were recorded from a range starting 20 nm above the excitation wavelength and extending to 800 nm. Emission spectra were assembled into a three-dimensional fluorescence spectroscopy and an excitation-emission matrix (EEM) to exploit endogenous fluorophores and diagnostic information. Then emission spectra of normal and adenomatous coionic tissues at certain excitation wavelengths were compared to determine the optimal excitation wavelengths for diagnosis of coionic cancer. RESULTS: When compared to normal tissues, low NAD (P)H and FAD, but high amino acids and endogenous phorphyrins of protoporphyrin IX characterized the high-grade malignant coionic tissues. The optimal excitation wavelengths for diagnosis of coionic cancer were about 340, 380, 460, and 540 nm. CONCLUSION: Significant differences in autofluorescence peaks and its intensities can be observed in normal and adenomatous coionic tissues. Autofluorescence EEMs are able to identify coionic tissues. 展开更多
关键词 Autofluorescence spectroscopy Excitation-emission matrix Optical diagnosis Colonic cancer
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Depression and anxiety levels in therapy-nave patients with inflammatory bowel disease and cancer of the colon 被引量:11
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作者 Branislav R Filipovi Branka F Filipovi +2 位作者 Mirko Kerkez Nikola Milini Tomislav Ran■elovi 《World Journal of Gastroenterology》 SCIE CAS CSCD 2007年第3期438-443,共6页
AIM: To assess whether depression and anxiety are more expressed in patients with the first episode of inflammatory bowel disease (IBD) than in individuals with newly discovered cancer of the colon (CCa). METHODS: A t... AIM: To assess whether depression and anxiety are more expressed in patients with the first episode of inflammatory bowel disease (IBD) than in individuals with newly discovered cancer of the colon (CCa). METHODS: A total of 32 patients with IBD including 13 males and 19 females, aged 27 to 74, and 30 patients with CCa including 20 males and 10 females, aged 39-78, underwent a structured interview, which comprised Hamilton’s Depression Rating Inventory, Hamilton’s Anxiety Rating Inventory and Paykel’s Stressful Events Rating Scale. RESULTS: Patients of the IBD group expressed both depression and anxiety. Depressive mood, sense of guilt, psychomotor retardation and somatic anxiety were also more pronounced in IBD patients. The discriminant function analysis revealed the total depressive score was of high importance for the classification of a newly diagnosed patient into one of the groups. CONCLUSION: Newly diagnosed patients with IBD have higher levels of depression and anxiety. Moreover, a psychiatrist in the treatment team is advisable from the beginning. 展开更多
关键词 Crohn's disease Ulcerative colitis Colon cancer Mood disorder
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A diagnostic approach to abdominal tuberculosis 被引量:1
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作者 Eser Vardareli Baybora Kircali 《World Journal of Gastroenterology》 SCIE CAS CSCD 2005年第21期3328-3328,共1页
TO THE EDITORWe read with interest the article by Uzunkoy et al[1]. about diagnosis of abdominal tuberculosis. In this article authors concluded that PCR for mycobacterium tuberculosis complex is a noninvasive method ... TO THE EDITORWe read with interest the article by Uzunkoy et al[1]. about diagnosis of abdominal tuberculosis. In this article authors concluded that PCR for mycobacterium tuberculosis complex is a noninvasive method which can provide the diagnosis in most cases. If this tests negative or not feasible, laparotomy should be performed. 展开更多
关键词 Abdominal tuberculosis
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Is sentinel lymph node biopsy necessary for the patients diagnosed with breast ductal carcinoma in situ using core needle biopsy or vacuum-assisted biopsy as the initial diagnostic method? 被引量:4
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作者 Xiaoyi Zhang Rui Wang +1 位作者 Zhiyong Wu Xueqing Jiang 《The Chinese-German Journal of Clinical Oncology》 CAS 2014年第11期509-514,共6页
Axillary lymph node status is one of the most important prognostic indicator of survival for breast cancer, especially in ductal carcinoma in situ (DCIS). The purpose of this study was to investigate whether sentine... Axillary lymph node status is one of the most important prognostic indicator of survival for breast cancer, especially in ductal carcinoma in situ (DCIS). The purpose of this study was to investigate whether sentinel lymph node biopsy (SLNB) should be performed in patients with an initial diagnosis of DCIS. Methods: A retrospective study was performed of 124 patients with an initial diagnosis of DCIS between March 2000 and June 2014. The patients were treated with either SLNB or axillary node dissection during the surgery, and we compared the clinicopathologic characteristics, image features, and immunohistochemical results. Results: Eighty-two patients (66.1%) had pure DCIS and 25 (20.2%) had DCIS with microinvasion (DCISM), 17 (13.7%) updated to invasive breast cancer (IBC). 115 patients (92.7%) underwent SLNB, among them, 70 patients (56.5%) underwent axillary node dissection. 3 of 115 patients (2.6%) had a positive sentinel lymph node, only 1 (1.4%) of 70 patients had axillary lymph node metastasis, in 84 patients (66.7%) who were diagnosed DCIS by core needle biopsy (CNB) and vacuum-assisted biopsy (VAB). 26 patients (31.0%) were upstaged into IBC or DCISM in the final histological diagnosis. The statistically significant factors predictive of underestimation were large tumor size, microcalcifications, comedo necrosis, positive Her-2 status, negative estrogen receptor status. Conclusion: The metastasis of sentinel lymph nodes in pure DCIS is very low, but the underestimation of invasive carcinoma in patients with an initial diagnosis of DCIS is an usual incident, especially in the cases when DCIS is diagnosed by CNB or VAB. Our findings suggest patients presenting with a preoperative diagnosis of DCIS associated with large tumor sizes, microcalcifications, comedo necrosis, positive Her-2 status, negative ER status are more likely to be DCISM and IBC in final diagnosis. SLNB should be performed in this part of patients. 展开更多
关键词 ductal carcinoma in situ (DCIS) breast cancer sentinel lymph node biopsy (SLNB) core needle biopsy (CNB) vacuum-assisted biopsy (VAB)
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Endoscopic ultrasound:It’s accuracy in evaluating mediastinal lymphadenopathy? A meta-analysis and systematic review 被引量:11
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作者 Srinivas R Puli Jyotsna Batapati Krishna Reddy +5 位作者 Matthew L Bechtold Jamal A Ibdah Daphne Antillon Shailender Singh Mojtaba Olyaee Mainor R Antillon 《World Journal of Gastroenterology》 SCIE CAS CSCD 2008年第19期3028-3037,共10页
AIM:To evaluate the accuracy of endoscopic ultrasound (EUS), EUS-fine needle aspiration (FNA) in evaluating mediastinal lymphadenopathy. METHODS:Only EUS and EUS-FNA studies confirmed by surgery or with appropriate fo... AIM:To evaluate the accuracy of endoscopic ultrasound (EUS), EUS-fine needle aspiration (FNA) in evaluating mediastinal lymphadenopathy. METHODS:Only EUS and EUS-FNA studies confirmed by surgery or with appropriate follow-up were selected. Articles were searched in Medline, Pubmed, and Cochrane control trial registry. Only studies from which a 2 × 2 table could be constructed for true positive, false negative, false positive and true negative values were included. Two reviewers independently searched and extracted data. The differences were resolved by mutual agreement. Meta-analysis for the accuracy of EUS was analyzed by calculating pooled estimates of sensitivity, specificity, likelihood ratios, and diagnostic odds ratios. Pooling was conducted by both Mantel-Haenszel method (fixed effects model) and DerSimonian Laird method (random effects model). The heterogeneity of studies was tested using Cochran’s Q test based upon inverse variance weights. RESULTS:Data was extracted from 76 studies (n = 9310) which met the inclusion criteria. Of these, 44 studies used EUS alone and 32 studies used EUS-FNA. FNA improved the sensitivity of EUS from 84.7% (95% CI:82.9-86.4) to 88.0% (95% CI:85.8-90.0). With FNA, the specificity of EUS improved from 84.6% (95% CI:83.2-85.9) to 96.4% (95% CI:95.3-97.4). The P forchi-squared heterogeneity for all the pooled accuracy estimates was > 0.10. CONCLUSION:EUS is highly sensitive and specific for the evaluation of mediastinal lymphadenopathy and FNA substantially improves this. EUS with FNA should be the diagnostic test of choice for evaluating mediastinal lymphadenopathy. 展开更多
关键词 Endoscopic ultrasound EUS-fine needleaspiration Mediastinal lymphadenopathy
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Should we redefi ne large common bile duct stone? 被引量:2
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作者 Shyam Sunder Sharma Pankaj Jain 《World Journal of Gastroenterology》 SCIE CAS CSCD 2008年第4期651-652,共2页
The definition of large stones is not clear ranging from 10 mm to 15 mm and does not include the lower common bile duct (CBD) diameter. Three hundred and four patients who underwent endoscopic retrograde cholangiopanc... The definition of large stones is not clear ranging from 10 mm to 15 mm and does not include the lower common bile duct (CBD) diameter. Three hundred and four patients who underwent endoscopic retrograde cholangiopancreatography and stone extraction were retrospectively analyzed over a 1-year period. Sixteen patients were different from others in that 10 patients with large stones had stone extraction with a wire basket or a balloon catheter and 6 patients with small stones had stone extraction with mechanical lithotripsy. The defi nition of large stones should include diameter of the lower CBD and any stone in lower CBD with its diameter greater than 2 mm. 展开更多
关键词 Large common bile duct stone DEFINITION
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Triple non-invasive diagnostic test for exclusion of common bile ducts stones before laparoscopic cholecystectomy
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作者 Bahram Pourseidi Amir Khorram-Manesh 《World Journal of Gastroenterology》 SCIE CAS CSCD 2007年第43期5745-5749,共5页
AIM: To evaluate the impact of a preoperative "triple non-invasive diagnostic test" for diagnosis and/or exclusion of common bile duct stones. METHODS: All patients with symptomatic gallstone disease, operat... AIM: To evaluate the impact of a preoperative "triple non-invasive diagnostic test" for diagnosis and/or exclusion of common bile duct stones. METHODS: All patients with symptomatic gallstone disease, operated on by laparoscopic cholecystectomy from March 2004 to March 2006 were studied retrospectively. Two hundred patients were included and reviewed by using a triple diagnostic test including: patient's medical history, routine liver function tests and routine ultrasonography. All patients were followed up 2-24 mo after surgery to evaluate the impact of triple diagnostic test. RESULTS: Twenty-five patients were identified to have common bile duct stones. Lack of history of stones, negative laboratory tests and normal ultrasonography alone was proven to exclude common bile duct stones in some patients. However, a combination of these three components (triple diagnostic), was proven to be the most statistically significant test to exclude common bile duct stones in patients with gallstone disease. CONCLUSION: Using a combination of routinely used diagnostic components as triple diagnostic modality would increase the diagnostic accuracy of common bile duct stones preoperatively. This triple non-invasive test is recommended for excluding common bile duct stones and to identify patients in need for other investigations. 展开更多
关键词 Common bile duct stones Laparoscopic cholecystectomy Triple non-invasive diagnostic test
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Diagnostic approach using endosonography guided fine needle aspiration for lymphadenopathy in primary sclerosing cholangitis 被引量:1
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作者 Shintaro Tsukinaga Hiroo Imazu +7 位作者 Yujiro Uchiyama Hiroshi Kakutani Akira Kuramoti Masayuki Kato Keisuke Kanazawa Tsuyoshi Kobayashi Yasuyuki Searashi Hisao Tajiri 《World Journal of Gastroenterology》 SCIE CAS CSCD 2007年第27期3758-3759,共2页
We report a case of primary sclerosing cholangitis (PSC) with benign lyphadenopathy which was diagnosed with endosonography guided fine needle aspiration (EUS-FNA). A 65-year-old woman was admitted to Jikei University... We report a case of primary sclerosing cholangitis (PSC) with benign lyphadenopathy which was diagnosed with endosonography guided fine needle aspiration (EUS-FNA). A 65-year-old woman was admitted to Jikei University Hospital with severe jaundice. Although endoscopic retrograde cholangiography and liver biopsy revealed the findings consistent with PSC, abdominal computed tomography revealed numerous large perihepatic lymph nodes with a maximum diameter of more than 3 cm. Therefore, EUS-FNA was done in order to exclude malignant lymphadenopathy, and adequate specimens obtained by EUS-FNA showed reactive hyperplasia of lymphnode. The patients were scheduled to undergo liver transplantation. 展开更多
关键词 Endosonography guided fine needle aspiration Primary sclerosing cholangitis LYMPHADENOPATHY
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The future of wireless capsule endoscopy 被引量:15
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作者 Paul Swain 《World Journal of Gastroenterology》 SCIE CAS CSCD 2008年第26期4142-4145,共4页
We outline probable and possible developments with wireless capsule endoscopy. It seems likely that capsule endoscopy will become increasingly effective in diagnostic gastrointestinal endoscopy. This will be attractiv... We outline probable and possible developments with wireless capsule endoscopy. It seems likely that capsule endoscopy will become increasingly effective in diagnostic gastrointestinal endoscopy. This will be attractive to patients especially for cancer or varices detection because capsule endoscopy is painless and is likely to have a higher take up rate compared to conventional colonoscopy and gastroscopy. Double imager capsules with increased frame rates have been used to image the esophagus for Barrett's and esophageal varices. The image quality is not bad but needs to be improved if it is to become a realistic substitute for flexible upper and lower gastrointestinal endoscopy. An increase in the frame rate, angle of view, depth of field, image numbers, duration of the procedure and improvements in illumination seem likely. Colonic, esophageal and gastric capsules will improve in quality, eroding the supremacy of flexible endoscopy, and become embedded into screening programs. Therapeutic capsules will emerge with brushing, cytology, fluid aspiration, biopsy and drug delivery capabilities. Electrocautery may also become possible. Diagnostic capsules will integrate physiological measurements with imaging and optical biopsy, and immunologic cancer recognition. Remote control movement will improve with the use of magnets and/or electrostimulation and perhaps electromechanical methods. External wireless commands will influence capsule diagnosis and therapy and will increasingly entail the use of real-time imaging. However, it should be noted that speculations about the future of technology in any detail are almost always wrong. 展开更多
关键词 Wireless CAPSULE ENDOSCOPY Future Complementary oxide silicone Charge coupled device Therapy Screening COLONOSCOPY BIOPSY Cancer ELECTROCAUTERY
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An Improved Method of Structure Damage Diagnosis for Jacket Platforms 被引量:1
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作者 刘娟 黄维平 石湘 《Journal of Marine Science and Application》 2011年第4期485-489,共5页
In the exploitation of ocean oil and gas, many offshore structures may be damaged due to the severe environment, so an effective method of diagnosing structural damage is urgently needed to locate the damage and evalu... In the exploitation of ocean oil and gas, many offshore structures may be damaged due to the severe environment, so an effective method of diagnosing structural damage is urgently needed to locate the damage and evaluate its severity. Genetic algorithms have become some of the most important global optimization tools and been widely used in many fields in recent years because of their simple operation and strong robustness. Based on the natural frequencies and mode shapes of the structure, the damage diagnosis of a jacket offshore platform is attributed to an optimization problem and studied by using a genetic algorithm. According to the principle that the structural stiffness of a certain direction can be greatly affected only when the brace bar in the corresponding direction is damaged, an improved objective function was proposed in this paper targeting measurement noise and the characteristics of modal identification for offshore platforms. This function can be used as fitness function of a genetic algorithm, and both numerical simulation and physical model test results show that the improved method may locate the structural damage and evaluate the severity of a jacket offshore platform satisfactorily while improving the robustness of evolutionary searching and the reliability of damage diagnosis. 展开更多
关键词 damage diagnosis genetic algorithm objective function mode shape error function
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Diagnosis by endoscopic ultrasound guided fine needle aspiration of tuberculous lymphadenitis involving the peripancreatic lymph nodes: A case report
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作者 Joseph D Boujaoude Khalil Honein +3 位作者 Cesar Yaghi Claude Ghora Gerard Abadjian Raymond Sayegh 《World Journal of Gastroenterology》 SCIE CAS CSCD 2007年第3期474-477,共4页
Pancreatic tuberculosis is an extremely rare form of extrapulmonary disease. The diagnosis preoperatively is difficult because clinical, laboratory and radiologic findings are nonspecific. Published data indicate that... Pancreatic tuberculosis is an extremely rare form of extrapulmonary disease. The diagnosis preoperatively is difficult because clinical, laboratory and radiologic findings are nonspecific. Published data indicate that these lesions mimic cystic neoplasms of the pancreas and the confirmation of clinical suspicion could only be obtained by an open surgical biopsy. Recently, fine needle aspiration cytology has been shown to be a safe, reliable and cost-effective alternative. We report a new case of a peripancreatic tuberculosis in a 52 year old woman and review the relevant literature, paying special attention to the usefulness of endoscopic ultrasound guided-fine needle aspiration in the diagnosis of abdominal tuberculosis. 展开更多
关键词 EUS guided-FNA PANCREATIC TUBERCULOSIS
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Dinucleotide microsatellite repeats are essential for the diagnosis of microsatellite instability in colorectal cancer in Asian patients
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作者 Manuel Salto-Tellez Soo-Yong Tan +1 位作者 Lily-Lily Chiu Evelyn Siew-Chuan Koay 《World Journal of Gastroenterology》 SCIE CAS CSCD 2005年第18期2781-2783,共3页
AIM: The molecular diagnosis of microsatellite instability (MSI) in colorectal cancer (CRC) is based on the analysis of five microsatellite markers. Among them, the two mononucleotide microsatellite repeats are consid... AIM: The molecular diagnosis of microsatellite instability (MSI) in colorectal cancer (CRC) is based on the analysis of five microsatellite markers. Among them, the two mononucleotide microsatellite repeats are considered more informative for this analysis than the three dinucleotide ones. The aim of this study is to establish the most relevant markers for MSI analysis in colorectal cancers from Asian patients. METHODS: The MSI analysis of 143 CRC cases in a routine molecular diagnostic laboratory was reviewed. Analysis by fluorescence-based PCR of the five recommended microsatellites was performed, followed by data interpretation according to internationally accepted guidelines. The results were analyzed to address (1) the rate of success in the analysis of histopathological samples not specifically preparedfor molecular analysis; (2) the relative importance ofindividual markers in the diagnosis of high-MSI (H-MSI).RESULTS: MSI analysis was unsuccessful in 34 cases (24%), but for tissues archived in recent years the unsuccessful rate was 5%. We found the D2S123 marker the mostvulnerable to inadequate tissue preservation, failing to amplify in 58 instances. Approximately 30% (32/109) of the cases were H-MSI, while 7/109 (6%) were low-MSI.A detailed analysis of the H-MSI cases revealed that the dinucleotide repeats (and D5S346 in particular) were more relevant than the mononucleotide repeats in assigning the correct MSI status. CONCLUSION: The analysis of dinucleotide repeats isessential for the establishment of MSI status in Asian CRC patients. 展开更多
关键词 Microsatellite instability Dinucleotide repeats Reference registration
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Broken Wires Diagnosis Method Numerical Simulation Based on Smart Cable Structure 被引量:1
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作者 Sheng LI Min ZHOU Yan YANG 《Photonic Sensors》 SCIE EI CAS 2014年第4期366-372,共7页
The smart cable with embedded distributed fiber optical Bragg grating (FBG) sensors was chosen as the object to study a new diagnosis method about broken wires of the bridge cable. The diagnosis strategy based on ca... The smart cable with embedded distributed fiber optical Bragg grating (FBG) sensors was chosen as the object to study a new diagnosis method about broken wires of the bridge cable. The diagnosis strategy based on cable force and stress distribution state of steel wires was put forward. By establishing the bridge-cable and cable-steel wires model, the broken wires sample database was simulated numerically. A method of the characterization cable state pattern which can both represent the degree and location of broken wires inside a cable was put forward. The training and predicting results of the sample database by the back propagation (BP) neural network showed that the proposed broken wires diagnosis method was feasible and expanded the broken wires diagnosis research area by using the smart cable which was used to be only representing cable force. 展开更多
关键词 Fiber optical Bragg grating sensor bridge cable broken wires diagnosis smart cable BP neuralnetwork
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Internal Structure Visualization of Flow and Flame by Process Tomography and PLIF Data Fusion 被引量:3
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作者 LIU J. LIU Shi +2 位作者 SUN S. PAN X I.H.I Schlaberg 《Journal of Thermal Science》 SCIE EI CAS CSCD 2018年第1期64-73,共10页
To address the increasing demands on pollution control and energy saving, the study of low-emission and high-efficiency burners has been emphasized worldwide. Swirl-induced environmental burners(EV-burners), have nota... To address the increasing demands on pollution control and energy saving, the study of low-emission and high-efficiency burners has been emphasized worldwide. Swirl-induced environmental burners(EV-burners), have notable features aligned with these requirements. In this study, an EV burner is investigated by both an ECT system and an OH-PLIF system. The aim is to detect the structure of a flame and obtain more information about the combustion process in an EV burner. 3D ECT sensitivity maps are generated for the measurement and OH-PLIF images are acquired in the same combustion zone as for the ECT measurements. The experimental images of a flame by ECT are in good agreement with the OH radical distribution pictures captured by OH-PLIF, which provide a mutual verification of the visualization method. 展开更多
关键词 Tomographic measurement EV burner ECT OH-PLIF
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