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Endoscopic findings and clinicopathologic characteristics of colonic schistosomiasis:A report of 46 cases

World Journal of Gastroenterology 2010年第6期16卷 723-727页

作者： Cao, jun Liu, Wen-Jia Xu, Xin-Yun Zou, xiao-ping Nanjing Univ Dept Gastroenterol Nanjing Gulou Hosp Sch Med Nanjing 210008 Jiangsu Prov Peoples R China Nanjing Univ Dept Pathol Nanjing Gulou Hosp Sch Med Nanjing 210008 Jiangsu Prov Peoples R China

AIM:To make a retrospective analysis of endoscopy findings and clinicopathologic characteristics of colonic schistosomiasis in order to further improve our understanding of the disease and decrease its misdiagnosis. METHODS:Endoscopy findings and clinicopathologic characteristics of 46 intestinal schistosomiasis patients were retrospectively *** the patients underwent colonoscopy and all biopsy specimens stained with hematoxylin and eosin were observed under a light microscope. RESULTS:Of the 46 colonic schistosomiasis patients,1 was diagnosed as acute schistosomal colitis,16 as chronic schistosomal colitis and 29 as chronic active schistosomal colitis according to their endoscopic findings and *** all patients were suspected of or diagnosed as colonic *** the 12 misdiagnosed patients,4 were misdiagnosed as ulcerativecolitis,1 as Crohn's disease,and 7 as ischemic *** segments of rectum and sigmoid colon were involved in 29 patients(63.0%) .Intact Schistosoma ova were deposited in colonic mucosa accompanying infiltration of eosinocytes,lymphocytes,and plasma cells in acute schistosomal colitis *** fibrosis was found in chronic schistosomal colitis *** the 17 patients with a signal polyp,hyperplastic polyp,canalicular adenoma with a low-grade intraepithelial neoplastic change,tubulovillous adenoma with a highgrade intraepithelial neoplastic change were observed in 10,5,and 2 patients,*** out of the 46 patients were diagnosed as colonic carcinoma. CONCLUSION:Endoscopy contributes to the diagnosis of colonic schistosomiasis although it is nonspecific. A correct diagnosis of colonic schistosomiasis can be established by endoscopy in combination with its clinicopathologic characteristics.

关键词： Colonic schistosomiasis Colonoscopy Diagnosis Pathology

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Using ^(137)Cs Tracer Technique to Evaluate Erosion and Deposition of Black Soil in Northeast China

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Pedosphere 2006年第2期16卷 201-209页

作者： FANG Hua-jun YANG Xue-Ming ZHANG xiao-ping LIANG Ai-Zhen Northeast Institute of Geography and Agricultural Ecology CAS Changchun 130012 （China）. Graduate School of the Chinese Academy of Sciences Beijing 100039 （China） Greenhouse ＆ Processing Crops Research Centre Agriculture ＆ Agri-Food Canada Harrow Ontario NOR 1 GO （Canada）

Soil and water losses through erosion have been serious in the black soil region of Northeast China. Therefore, a sloping cultivated land in Songnen Plain was selected as a case study to： 1） determine the ^137Cs reference inventory in the study area; 2） calculate erosion and deposition rates of black soil on different slope locations; 3） conduct a sensitivity analysis of some model parameters; and 4） compare overall outputs using four different models. Three transects were set in the field with five slope locations for each transect, including summit, shoulder-slope, back-slope, foot-slope, and toe-slope. Field measurements and model simulation were used to estimate a bomb-derived ^137Cs reference inventory in the study area. Soil erosion and deposition rates were estimated using four ^137Cs models and percentage of ^137Cs loss/gain. The ^137Cs reference value in the study area was 2 232.8 Bq m^-2 with ^137Cs showing a clear topographic pattern, decreasing from the summit to shoulder-slope, then increasing again at the foot-slope and reaching a maximum at the toe-slope, Predicted soil redistribution rates for different slope locations varied. Among models, the Yang Model （YANG-M） overestimated erosion loss but underestimated deposition. However, the standard mass balance model （MBM1） gave predictions similar to a mass balance model incorporating soil movement by tillage （MBM2）. Sensitivity analysis of the proportion factor and distribution pattern of ^137Cs in the surface layer demonstrated the impact of ^137Cs enrichment on calculation of the soil erosion rate. Factors influencing the redistribution of fallout ^137Cs in landscape should be fully considered as calculating soil redistribution rate using ^137Cs technique.

关键词： black soil cesium-137 (^137Cs) Northeast China quantitative models soil erosion

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Growth rate and composition of directionally solidified intermetallic TiAl–Nb alloys with different solidification conditions

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Rare Metals 2016年第1期35卷 54-64页

作者： Li-Wei Zhang jun-Pin Lin Xiang-jun Xu Jian-ping He Xian-Fei Ding xiao-Ou Jin State Key Laboratory for Advanced Metals and Materials University of Science and Technology Beijing Materials and Chemistry School Zhongyuan University of Technology National Center for Materials Service Safety University of Science and Technology Beijing School of Architecture and Engineering Heilongjiang University

Intermetallic Ti-xAl-8Nb（x = 41,43,45,47,49;at%） alloys were solidified unidirectionally upwards with a constant temperature gradient of G=3.8 K·mm^（-1）at wide range of growth rates of v=10-400 μm·s^（-1）using a Bridgman directional solidification（DS） *** parameters including the primary dendrite arm spacing（λ_1）,secondary dendrite arm spacing（λ_2）,dendrite tip radius（R） and mushy zone depth（d） were measured *** values of λ_1,λ_2,R and d decrease as the growth rate increases for a given composition（x）.The values of λ_1,λ_2,R and v increase with the increase in x value,while the value of d firstly increases and then decreases with the increase in x value for a given *** relationships between λ_1,λ_2 and R were analyzed by the linear *** average growth rate exponent of λ_1 is 0.29,which is in accordance with the previous experimental observations,and that of λ_2 is close to the previous experimental results,while those of R and d are lower than the results in other alloy *** addition,theoretical models for λ_1,λ_2 and R were compared with the experimental observations,and a comparison of the present experimental results with the theoretical models and previous experimental results was also made.

关键词： TiAl-Nb alloys Intermetallic Directionalsolidification Microstructural parameters Soluteconcentration

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Sensor/Actuator Faults Detection for Networked Control Systems via Predictive Control

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International Journal of Automation and computing 2013年第3期10卷 173-180页

作者： Yu-Yan Zhang jun-Ling Zhang xiao-Yuan Luo Xin-ping Guan Institute of Electrical Engineering Yanshan University

Quantized fault detection for sensor/actuator faults of networked control systems （NCSs） with time delays both in the sensor-to-controller channel and controller-to-actuator channel is concerned in this paper. A fault model is set up based on the possible cases of sensor/atuator faults. Then, the model predictive control is used to compensate the time delay. When the sensors and actuators are healthy, an H stability criterion of the state predictive observer is obtained in terms of linear matrix inequality. A new threshold computational method that conforms to the actual situation is proposed. Then, the thresholds of the false alarm rate （FAR） and miss detection rate （MDR） are presented by using our proposed method, which are also compared with the ones given in the existin~ literatures. Finally, some numerical simulations are shown to demonstrate the effectiveness of the proposed method.

关键词： Networked control system fault detection false alarm rate (FAR) miss detection rate (MDR) predictive control.

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MiCPhot:A prime-focus multicolor CCD photometer on the 85-cm Telescope

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Chinese Journal of Astronomy and Astrophysics 2009年第3期9卷 349-366页

作者： Ai-Ying Zhou xiao-jun Jiang Yan-ping Zhang Jian-Yan Wei National Astronomical Observatories Chinese Academy of Sciences Beijing 100012 China Department of Astronomy Beijing Normal University Beijing 100875 China

We describe a new BVRI multicolor CCD photometric system situated at the prime focus of the 85-cm telescope at the Xinglong Station of NAOC. Atmospheric extinction effects, photometric accuracy and color calibration dependence of the system are investigated. Additional attention was paid to giving observers guidance in estimating throughput, detection limit, signal-to-noise ratio and exposure time.

关键词： instrumentation photometers CCD photometer- techniques photometric

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A Heuristic Genetic Algorithm for No-Wait Flowshop Scheduling Problem

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Journal of China University of Mining and Technology 2007年第4期17卷 582-586页

作者： CHANG jun-lin GONG Dun-wei MA xiao-ping School of lnformation and Electrical Engineering China University of Mining ＆ Technology Xuzhou Jiangsu 221008 China

No-wait flowshop scheduling problems with the objective to minimize the total flow time is an important se-quencing problem in the field of developing production plans and has a wide engineering background. Genetic algo-rithm (GA) has the capability of global convergence and has been proven effective to solve NP-hard combinatorial op-timization problems,while simple heuristics have the advantage of fast local convergence and can be easily imple-mented. In order to avoid the defect of slow convergence or premature,a heuristic genetic algorithm is proposed by in-corporating the simple heuristics and local search into the traditional genetic algorithm. In this hybridized algorithm,the structural information of no-wait flowshops and high-effective heuristics are incorporated to design a new method for generating initial generation and a new crossover operator. The computational results show the developed heuristic ge-netic algorithm is efficient and the quality of its solution has advantage over the best known algorithm. It is suitable for solving the large scale practical problems and lays a foundation for the application of meta-heuristic algorithms in in-dustrial production.

关键词： production scheduling genetic algorithm flowshop no-wait

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Determination of optimal grid opening width for herringbone water-sediment separation structures based on sediment separation efficiency

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Journal of Mountain Science 2019年第3期16卷 619-629页

作者： XIE Xiang-ping WEI Fang-qiang WANG xiao-jun YANG Hong-juan Anyang Institute of Technology Chongqing Institutes of Green and Intelligent Technology Chinese Academy of Science Institute of Mountain Hazards and Environment Chinese Academy of Sciences

The herringbone water-sediment separation structure(HWSSS) was developed to prevent debris flows. This paper mainly focuses on evaluating the sediment separation efficiency of HWSSS in debris flow prevention and determining the grid opening width D, a crucial structure parameter for HWSSS design. Theoretical analysis on the total sediment separation rate Pt reveals that the efficiency of sediment separation is much related with sediment grain size distribution(GSD) and grid opening width. The lower limit of Pt is deduced from the perspective of safety consideration by transforming debris flow into sediment-laden flow. Hydraulic model tests were carried out. Based on the regression analysis of the experimental data, the quantitative relationships between Pt and D and GSD characteristic values were finally established. A procedure for determining optimal grid opening width is proposed based on these analyses. These results are of significance in evaluating sediment separation effect by HWSSS in debris flow prevention and contribute to a more explicit methodology for design of HWSSS.

关键词： Debris flow Water-sediment separation Structure design Sediment separation efficiency Grid opening width

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Influence of Copper on Transport and Dissipation of Lambda-Cyhalothrin and Cypermethrin in Soils

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Pedosphere 2013年第3期23卷 395-401页

作者： LIU jun L xiao-Meng XIE Ji-Min LI ping-ping HAN Jian-Gang SUN Cheng School of the Environment Jiangsu University State Key Laboratory of Soil and Sustainable Agriculture Institute of Soil Science Chinese Academy of Sciences School of Chemistry and Chemical Engineering Jiangsu University Jiangsu Provincial Key Laboratory of Modern Agricultural Equipment and Technology Institute of Agricultural Engineering Jiangsu University State Key Lab of Pollution Control and Resource Reuse Nanjing University

Repeated applications of bordeaux mixture （a blend of copper sulfate and calcium hydroxide） and pyrethroid insecticides （Pys） have led to elevated copper （Cu） and Pys concentrations in vineyard surface soils. To understand the potential influence of Cu on the fate of Pys in the soil environment, we selected two Pys, cypermethrin （CPM） and lambda-cyhalothrin （A-CHT）, and two typical Chinese vineyard soils, Haplic Acrisol and Luvic Phaeozem, as experimental samples. The dissipation experiment was conducted at room temperature in the dark, and the transport of both Pys through the soils was investigated using soil thin-layer chromatography. The results showed that the transport of Pys in both soils increased as the Cu2＋ concentration increased from 0 to 100 mg L-1, and Pys were more transportable in Haplic Acrisol （HA） than in Luvic Phaeozem （LP） under the same experimental conditions. For CPM, only 100 mg L-1 of Cu2＋ significantly （P 〈 0.05） increased Pys transport through both soils relative to water. Lambda-CHT was significantly （P〈0.05） transported through HA by all the Cu2＋ concentrations compared to water, and all but the 1 mg L-1 of Cu2＋ significantly （P 〈 0.05） increased the transport of A-CHT through LP relative to water. However, the dissipation rates of CPM and λ-CHT decreased with the addition of Cu to soils. Our findings suggest that the risk of groundwater contamination by Pys increases in the soils with elevated Cu concentrations.

关键词： Haplic Acrisol Luvic Phaeozem potential ecological risk pyrethroid insecticides soil thin-layer chromatography

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Improvement on Simultaneous Determination of Cr(III) and Cr(VI) by Capillary Electrophoresis and Chemiluminescence Detection

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Chinese Chemical Letters 2003年第3期14卷 287-289页

作者： Wei DENG Wei ping YANG Zhu jun ZHANG xiao Rong LI 中国人民解放军85医院，上海200052

A sensitive method for the simultaneous determination of Cr(III) and Cr(VI) using in-capillary reaction capillary electrophoresis separation and chemiluminescence detection was developed. The procedures were designed as follows: The sample, hydrochloric acid and sodium hydrogen sulfite solution segments were injected sequentially into the capillary. The reaction of Cr(VI) reduced to Cr(III) by HSO3- occurred inside the capillary after applying the running voltage. According to the migration time difference of both Cr(III) ions moving towards to the cathode (detection end), they could be separated and determined. The limits of detection for chromium(III) and chromium(VI) (S/N = 3) were 6.010-13 mol/L (12 zmol) and 1.910-11 mol/L (380 zmol), respectively.

关键词： Chemiluminescence in-capillary reaction chromium capillary electrophoresis.

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Clinical value of fecal calprotectin in determining disease activity of ulcerative colitis

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World Journal of Gastroenterology 2008年第1期14卷 53-57页

作者： jun-Ying Xiang Qin Ouyang Guo-Dong Li Nan-ping xiao Department of Gastroenterology West China Hospital Sichuan University Chengdu 610041 Sichuan Province China

AIM： To investigate possibility and clinical application of fecal calprotectin in determining disease activity of ulcerative colitis （UC）. METHODS： The enzyme-linked immunosorbent assay （ELISA） was used to measure the concentrations of calprotectin in feces obtained from 66 patients with UC and 20 controls. C-reactive protein （CRP）, erythrocyte sedimentation rate （ESR）, acid glycoprotein （AGP） were also measured and were compared with calprotectin in determining disease activity of UC. The disease activity of UC was also determined by the Sutherland criteria. RESULTS： The fecal calprotectin concentration in the patients with active UC was significantly higher than that in the inactive UC and in the controls （402.16 ± 48.0 μg/g vs 35.93 ± 3.39 μg/g, 11.5 ± 3.42 μg/g, P 〈 0.01）. The fecal calprotectin concentration in the inactive UC group was significantly higher than that in the control group （P 〈 0.05）. A significant difference was also found in the patients with active UC of mild, moderate and severe degrees. The area under the curve of the receiver operating characteristics （AUCR^c） was 0.975, 0.740, 0.692 and 0.737 for fecal calprotectin, CRP, ESR and AGP, respectively. There was a strong correlation between the fecal calprotectin concentration and the endoscopic gradings for UC （r = 0.866, P 〈 0.001）. CONCLUSION： Calprotectin in the patient＇s feces can reflect the disease activity of UC and can be used as a rational fecal marker for intestinal inflammation in clinical practice. This kind of marker is relatively precise, simple and noninvasive when compared with other commonlyused markers such as CRP, ESR and AGP.

关键词： Fecal calprotectin Disease activity Ulcerative colitis Enzyme-linked immunosorbent assay

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