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Inhibition of different types of inert dust on aluminum powder explosion

Chinese Journal of Chemical Engineering 2020年第7期28卷 1941-1949页

作者： linlin Dai lin hao Wei Kang Wei Xu Ning Shi HongyuanWei School of Chemical Engineering and Technology Tianjin UniversityTianjin 300072China Institute of Qingdao Safety Engineering China Petroleum&Chemical CorporationQingdao 266000China

Aluminum powder explosion accidents occurred frequently,but the mechanism of aluminum powder explosion is ***,the inhibitive effect of aluminum powder explosion plays a key *** evaluate the inhibition capacity of different kinds of carbonates and phosphates:Na H2PO4,(NH4)2HPO4,NH4H2PO4,KHCO3 and Na HCO3 on aluminum deflagrations,a standard 20-L spherical chamber was used to determine the explosion severity,characterized by the maximum explosion pressure(Pmax).New parameters have been proposed:the minimum significant inert concentration(MSIC)and the minimum complete inert concentration(MCIC),which characterized the effect of *** results showed that from the minimum significant inert concentration(MSIC)and the minimum complete inert concentration(MCIC),phosphate can have a significant inhibiting effect.40%Na H2PO4 can totally inert the aluminum explosion,and 50%(NH4)2HPO4or 50%NH4H2PO4 can also suppress the *** simulation,phosphate mainly acts via a chemical inhibition pathway,which inhibits the reaction of aluminum powder and oxygen by catalyzing the recombination of H atoms and O *** performs inhibition in chemically,producing CO2,diluting the oxygen around the aluminum *** indicated that the explosion pressure of the mixture decreases as the concentration of inert dust ***,when the concentration of carbonates was low,SEEP(suppressant enhanced explosion parameter)phenomenon was *** research work has a potential industrial application in high hazard aluminum working condition,which can help decrease the explosion pressure and reduce the accident loss.

关键词： Aluminum dust explosion Inert Carbonate Phosphate Maximum explosion pressure

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Preparation of thiophilic paramagnetic adsorbent for separation of antibodies

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Chinese Chemical Letters 2008年第12期19卷 1495-1498页

作者： Ming Qin Chen Zhi Yong lin hao Qian College of Material Science and Engineering Huaqiao University Quanzhou 362021 China

The micron-sized microspheres with superparamagnetic property were synthesized with vinyl acetate and divinylbenzene by microsuspension polymerization. After the complete alcoholysis, these hydroxyl-functionalized microspheres were activated by divinylfone and modified with mercaptoethanol to prepare the thiophilic magnetic adsorbent, which was used to specifically isolate immunoglobulin G （IgG） from human serum. This thiophilic magnetic adsorbent performed an evident salt-dependent adsorption behavior for IgG. Due to their salt-promoted adsorption towards IgG under high salt concentration, the absorbed antibodies could be extracted in low salt concentration with high purity.

关键词： Superparamagnetic Thiophilic Microsuspension Immunoglobulin G Isolation

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An expedient synthesis of peptidyl N-alkylamides by "HOPE" strategy

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Chinese Chemical Letters 2012年第5期23卷 565-568页

作者： hao lin Xiao Xiao Yang De Xin Wang Institute of Materia Medica Chinese Academy of Medical Sciences&Peking Union Medical CollegeBeijing Key Laboratory of Active Substance Discovery and Druggability Evaluation Beijing 100050China

We have developed an expedient approach,＂HOPE＂（hybrid orthogonal protocol with ease） strategy for the synthesis of peptidyl *** new strategy was characterized by following points：incorporating Boc and Fmoc protocols together on Merrifield resin,removal of SPG（side-chain protecting groups） without the damage of linker structure on the resin,and the ammonolysis of linker as the last step could achieve the introducing N-alkylamide structure into C-terminal and releasing product from resin-support *** present work,eight peptidylamides with different alkylsubstitution at C-terminal were conveniently synthesized by HOPE strategy.

关键词： "HOPE" strategy Solid-phase peptide synthesis Peptidyl N-alkylamide

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Novel algorithm for detection and identification of radioactive materials in an urban environment

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Nuclear Science and Techniques 2023年第10期34卷 103-116页

作者： hao-lin Liu Hai-Bo Ji Jiang-Mei Zhang Jing Lu Cao-lin Zhang Xing-Hua Feng Department of Automation University of Science and Technology of ChinaHefei 230026China School of Information Engineering Southwest University of Science and TechnologyMianyang 621010China Fundamental Science on Nuclear Wastes and Environment Safety Laboratory Southwest University of Science and TechnologyMianyang 621010China School of Automation and Information Engineering Sichuan University of Science and EngineeringZigong 643000China

This study introduces a novel algorithm to detect and identify radioactive materials in urban settings using time-series detector response data. To address the challenges posed by varying backgrounds and to enhance the quality and reliability of the energy spectrum data, we devised a temporal energy window. This partitioned the time-series detector response data, resulting in energy spectra that emphasize the vital information pertaining to radioactive materials. We then extracted characteristic features of these energy spectra, relying on the formation mechanism and measurement principles of the gammaray instrument spectrum. These features encompassed aggregated counts, peak-to-flat ratios, and peak-to-peak ratios. This methodology not only simplified the interpretation of the energy spectra's physical significance but also eliminated the necessity for peak searching and individual peak analyses. Given the requirements of imbalanced multi-classification, we created a detection and identification model using a weighted k-nearest neighbors(KNN) framework. This model recognized that energy spectra of identical radioactive materials exhibit minimal inter-class similarity. Consequently, it considerably boosted the classification accuracy of minority classes, enhancing the classifier's overall efficacy. We also executed a series of comparative experiments. Established methods for radionuclide identification classification, such as standard KNN, support vector machine, Bayesian network, and random tree, were used for comparison purposes. Our proposed algorithm realized an F1 measure of 0.9868 on the time-series detector response data, reflecting a minimum enhancement of 0.3% in comparison with other techniques. The results conclusively show that our algorithm outperforms others when applied to time-series detector response data in urban contexts.

关键词： Gamma-ray spectral analysis Nuclide identification Urban environment Temporal energy window Peakratio spectrum analysis Weighted KNN

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Decomposition behavior of titanium hydride treated by surface oxidation

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Rare Metals 2015年第1期34卷 28-33页

作者： Hong-Jie Luo hao lin Pei-Hong Chen Guang-Chun Yao School of Materials and Metallurgy Northeastern University Engineering Technology Research Centre of Ministry of Education for Materials Advanced Preparation

Titanium hydride attracts more attention as foaming agent in the fabrication of cellular metal materials. In order to meet most aluminum casting alloy＇s melting properties, the heat treatment processes for Till2 particles were investigated in a rotating device. In the present work, the most two important dynamic parameters, the treating temperature and oxidation interval, were taken under consideration. The decomposition behavior of titanium hydride was measured by differential scanning calorimetry （DSC） and the residual hydrogen content, morphologies and phase conversion were also characterized by hydrogen determinator, scanning electron microscopy （SEM）, and X-ray diffractometer （XRD）, respectively. The results show that the effect of temperature on the formation of oxidation film and decomposition behavior of Till2 is more significant than that of oxidation time. The onset temper- ature and peak value of Till2 decomposition shift from left to right through elevating temperature and extending time. Heat treatment process for Till2 at 500 ℃ between 1 and 5 h in air is favorable for preparing aluminum foam.

关键词： Titanium hydride Oxidation treatment Thermal decomposition Aluminum foam

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A novel approach for feature extraction from a gamma‑ray energy spectrum based on image descriptor transferring for radionuclide identification

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Nuclear Science and Techniques 2022年第12期33卷 88-104页

作者： hao‑lin Liu Hai‑Bo Ji Jiang‑Mei Zhang Cao‑lin Zhang Jing Lu Xing‑Hua Feng Department of Automation University of Science and Technology of ChinaHefei 230026China School of Information Engineering Southwest University of Science and TechnologyMianyang 621010China Fundamental Science on Nuclear Wastes and Environment Safety Laboratory Southwest University of Science and TechnologyMianyang 621010China

This study proposes a novel feature extraction approach for radionuclide identification to increase the precision of identification of the gamma-ray energy spectrum *** easier utilization of the information contained in the spectra,the vectors of the gamma-ray energy spectra from Euclidean space,which are fingerprints of the different types of radionuclides,were mapped to matrices in the Banach ***,to make the spectra in matrix form easier to apply to image-based deep learning frameworks,the matrices of the gamma-ray energy spectra were mapped to images in the RGB color space.A deep convolutional neural network(DCNN)model was constructed and trained on the ImageNet *** mapped gamma-ray energy spectrum images were applied as inputs to the DCNN model,and the corresponding outputs of the convolution layers and fully connected layers were transferred as descriptors of the images to construct a new classification model for radionuclide *** transferred image descriptors consist of global and local features,where the activation vectors of fully connected layers are global features,and activations from convolution layers are local features.A series of comparative experiments between the transferred image descriptors,peak information,features extracted by the histogram of the oriented gradients(HOG),and scale-invariant feature transform(SIFT)using both synthetic and measured data were applied to 11 classical *** results demonstrate that although the gamma-ray energy spectrum images are completely unfamiliar to the DCNN model and have not been used in the pre-training process,the transferred image descriptors achieved good classification *** global features have strong semantic information,which achieves an average accuracy of 92.76%and 94.86%on the synthetic dataset and measured dataset,*** results of the statistical comparison of features demonstrate that the proposed approach outperforms the peak-se

关键词： Radionuclide identification Feature extraction Transfer learning Gamma energy spectrum analysis Image descriptor

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A new type of anionic surfactant with four carboxylates for the preparation of mesoporous materials

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Frontiers of Materials Science 2012年第3期6卷 268-277页

作者： lin-hao SUN Song WANG Wei-lin SHI Shuming ZHANG Xi CHEN Qiang CAI Department of Materials Science and Engineering Tsinghua UniversityBeijing 100084China Department of Materials Science and Engineering WhitingSchoolof EngineeringJohns Hopkins University3400 N.Charles St.BaltimoreMD 21218USA

In this paper, a new type of anionic surfactant containing four carboxylates was synthesized by a four-step synthetic reaction including bromination reaction and primary amide protective reaction. Intermediates and final products of each step in the whole synthetic process were characterized by IH NMR and MS. Purification of the anionic surfactant was accomplished through combination of recrystallization and silica gel column chromatography. The structure and the critical micelle concentration （CMC） of this surfactant at different temperatures were also investigated. Unlike traditional mono- carboxylate surfactant easy to form lamellar mesostructure, this surfactant has the hexagonal mesophase structure and comparatively low CMC, *** to be applied in the preparation of mesoporous metal oxides.

关键词： surfactant four carboxylates hexagonal mesosphase critical micelleconcentration (CMC)

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Recommendations for articles and reviews in colorectal cancerrelated research at the year-end of 2023

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World Journal of Gastroenterology 2024年第30期30卷 3548-3553页

作者： Wen-Yu Luan hao lin Yan-Dong Miao Department of Cancer Center The Yantai Affiliated Hospital of Binzhou Medical UniversityThe Second Medical College of Binzhou Medical UniversityYantai 264100Shandong ProvinceChina

As peer reviewers of the World Journal of Gastroenterology,our weekly routine involves immersing ourselves in the newly published issue,particularly focusing on the realm of colorectal cancer(CRC)*** diligently sift through various contributions,ranging from comprehensive reviews to original articles and other scholarly *** meticulous examination,we discern the most notable papers,delving into each with careful scrutiny to distill their merits and ***,this undertaking demands considerable time and ***,it stands as an indispensable pursuit,affording us a profound comprehension of the latest breakthroughs in CRC ***,these meticulously curated selections furnish readers with invaluable resources,serving as enduring references for the nuanced exploration of this dynamic field.

关键词： Colorectal cancer Molecular mechanism Genetic marker Application of new technologies Diagnosis Treatment

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Application of landmark recognition on iPhone

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西安建筑科技大学学报（自然科学版） 2013年第5期45卷 755-760页

作者： lin Chen-hao FAN Meng-tian Electrical Engineering Department of Columbia University

Landmark recognition on iPhone was proposed in this paper,so as to enable the user to take photos of some famous landmarks in the world and return the result of what this landmark is as well as provide some useful information about this landmark such as travel guide,history and interesting *** approach to recognize the landmark is by extracting features,using bag-of-words model and support vector machine to train the dataset,hence to get the classification *** this model is used to predict photos the user has *** article compares the different algorithm like SIFT,Gist and Hog to extract features and build a classification *** article uses PC as the server to recognize landmark photos and return results to users.

关键词：移动通信手机品牌 iPhone SVM BoW

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Fluid Characteristics and Evolution of the Zhawulong Granitic Pegmatite Lithium Deposit in the Ganzi-Songpan Region, Southwestern China

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Acta Geologica Sinica(English Edition) 2019年第4期93卷 943-954页

作者： XIONG Xin LI Jiankang WANG Denghong LI Shanping lin hao MNR Key Laboratory of Metallogeny and Mineral Assessment Institute of Mineral ResourcesChinese Academy of Geological SciencesBeijing 100037China Qinghai Province Key Laboratory of Geological Process and Mineral Resources of Northern Qinghai-Tibetan Plateau Qinghai Institute of Geological SurveyXining 810012China Qinghai University Xining 810016China

The Zhawulong granitic pegmatite lithium deposit is located in the Ganzi-Songpan orogenic *** inclusions in spodumene and coexisting quartz were studied to understand the cooling path and evolution of fluid within albite–spodumene *** are three distinguishable types of fluid inclusions:crystal-rich,CO2–NaCl–H2 O,and NaCl–H2 *** more than 500°C and 350~480 MPa,crystal-rich fluid inclusions were captured during the pegmatitic magma-hydrothermal transition stage,characterized by a dense hydrous alkali borosilicate fluid with a carbonate *** 412°C and 278°C,CO2–Na Cl–H2 Ofluid inclusions developed in spodumene(I)and quartz(II)with a low salinity(3.3–11.9 wt%NaCl equivalent)and a high volatile content,which represent the boundary between the transition stage and the hydrothermal *** subsequentNaCl–H2 Ofluid inclusions from the hydrothermal stage,between 189°C and 302°C,have a low salinity(1.1–13.9 wt%NaCl equivalent).The various types of fluid inclusions reveal the P–T conditions of pegmatite formation,which marks the transition process from magmatic to *** oreforming fluids from the Zhawulong deposit have many of the same characteristics as those from the Jiajika lithium *** ore-forming fluid provided not only materials for crystallization of rare metal minerals,such as spodumene and beryl,but also the ideal conditions forthe growth of ore ***,this area has favorable conditions for lithium enrichment and excellent prospecting potential.

关键词： granitic pegmatite fluid inclusions rare metals lithium deposit Zhawulong

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