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Projectively flat Asanov Finsler metric

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Journal of Zhejiang University-Science A(Applied Physics & Engineering) 2007年第6期8卷 963-968页

作者： han jing-wei YU Yao-yong Department of Mathematics Zhejiang University Hangzhou 310027 China School of Science Hangzhou Dianzi University Hangzhou 310028 China

In this work, we study the Asanov Finsler metric F=α（β^2/α^2＋gβ/α＋1）^1/2exp{（G/2）arctan[β/（hα）＋G/2]}, where α=（αijy^iy^i）^1/2 is a Riemannian metric and β=by^i is a 1-fom, g∈（-2,2）, h=（1-g^2/4）^1/2, G=g/h. We give the necessary and sufficient condition for Asanov metric to be locally projectively flat, i.e., α is projectively flat and ,Sis parallel with respect to α. Moreover, we proved that the Douglas tensor of Asanov Finsler metric vanishes if and only if β is parallel with respect to α.

关键词： Exponential Finsler metric Projectively flat (α β)-metrics Douglas tensor

Thermodynamic and experimental study of high-temperature roasting of blast furnace gas ash for recovery of metallic zinc and iron

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Journal of Iron and Steel Research International 2024年第1期31卷 108-120页

作者： Zi-han Wang jing Guo han-jie Guo Bin Li School of Metallurgical Engineering University of Science and Technology BeijingBeijing100083China School of Metallurgical Engineering Xi’an University of Architecture and TechnologyXi’an710055ShaanxiChina

A high-temperature reduction roasting method was used to achieve metallic iron and zinc recovery from blast furnace gas ash(BFA).The reduction processes for Zn-containing and Fe-containing oxides were analyzed in detail by using ther-modynamic equilibrium calculation and the principle of minimum free *** results showed that the main reaction in the system is the reduction of ZnFe_(2)_(4)and iron *** the full temperature range,iron oxides were more easily reduced than zinc *** of the amount of CO contained in the system,the reduction of ZnO to Zn was difficult to proceed below the boiling point(906℃)of *** the reduction temperature is below 906℃,the reduction process of zinc ferrate was ZnFe_(2)_(4)→ZnO;when the reduction temperature is above 906℃,its reduction process becomed ZnFe_(2)_(4)→ZnO→Zn(g).The metallization and dezincification rates of the BFA gradually increased with increasing reaction *** the C/O ratio increased,the metallization and dezincification rates first increased and then *** effect of reduction time on BFA reduction was similar to that of reaction temperature.

关键词： Blast furnace gas ash Thermodynamics Zinc removal Iron reduction High-temperature reduction roasting Integrated utilization

Design of coherent wideband radiation process in a Nd3+-doped high entropy glass system

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Light(Science & Applications) 2022年第9期11卷 2065-2076页

作者： LINDE ZhanG jingYUAN ZhanG XIANG WANG meng TAO GANGTAO DAI jing WU ZhanGWANG MIAO SHIFEI han HAIJUAN YU Xuechun Lin Laboratory of All-solid-state Light Sources Beijing Engineering Research CenterInstitute of SemiconductorsChinese Academy of Sciences100083 BeijingChina Synlumin Conuninex(Shanghai)Enterprise Development Co. Ltd.201401 ShanghaiChina Time-wave-space Optical Technology(Xiaogan)Co. Ltd.432012 XiaoganHubeiChina High-dimensional Plasma Sources Technology(Xiaogan)Co. Ltd.432012 XiaoganHubeiChina

We discover that the spatially coherent radiation within a certain frequency range can be obtained without a common nonlinear optical ***,the emission spectra were obtained by de-exciting excited centers from real excited energy levels to the ground *** findings are achieved by deploying a high-entropy glass system(HEGS)doped with neodymium *** HEGS exhibits a much broader infrared absorption than common glass systems,which can be attributed to be high-frequency optical branch phonons or allowable multi-phonon processes caused by phonon broadening in the system.A broadened phonon-assisted wideband radiation(BPAWR)is induced if the pump laser is absorbed by the *** subsequent low-threshold self-absorption coherence modulation(SACM)can be controlled by changing excitation wavelengths,sample size,and doping *** SACM can be red-shifted through the emission of phonons of the excited species and be blue-shifted by absorbing phonons before they are *** is a time delay up to 1.66 ns between the pump pulse and the BPAWR when measured after traveling through a 35 mm long sample,which is much longer than the Raman *** BPAWR-SACM can amplify the centered non-absorption band with a gain up to 26.02 *** results reveal that the shift of the novel radiation is determined by the frequency of the non-absorption band near the absorption region,and therefore the emission shifts can be modulated by changing the absorption *** used in fiber lasers,the BPAWR-SACM process may help to achieve tunability.

关键词： pump wideband excited

A comprehensive review on semiconductor-based photocatalysts toward the degradation of persistent pesticides

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Nano Research 2023年第5期16卷 6402-6443页

作者： jing Zhu Min Liao Chen Zhao mengmeng Liu Ali han Chunna Zhu Yujia Sun meng Zhao Sheng Ye Haiqun Cao College of Science&School of Plant Protection Anhui Province Engineering Laboratory for Green Pesticide Development and ApplicationAnhui Province Key Laboratory of Crop Integrated Pest ManagementAnhui Agricultural UniversityHefei 230036China Shenyang National Laboratory for Materials Science Institute of Metal ResearchChinese Academy of SciencesShenyang 110016China

Pesticides refer to the chemicals to regulate plant growth and control pests used in ***,the extensive use of pesticides causes serious pollution that threatens the ecological environment and human *** degradation of pesticides has become a promising way to deal with pesticide *** this review,pesticides are classified according to the different targets and chemical *** recent developments on semiconductor-based photocatalysts including metal oxides,metal oxyhalides,carbon nitrides,metal sulfides were reviewed for degradation of ***,several modification strategies to improve the photocatalytic performance are described such as doping,heterojunction construction,defect engineering,with special emphasis on anchoring single atom ***,extensive efforts should be made to indepth understand the photodegradation mechanism by monitoring key *** perspectives on the key challenges and future directions of developing high-performance semiconductor-based photocatalysts for pesticide degradation are elaborated.

关键词： semiconductor photocatalysis degradation pesticide

Wind speed prediction based on nested shared weight long short-term memory network

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The Journal of China Universities of Posts and Telecommunications 2021年第1期28卷 41-51页

作者： han Fengquan han Yinghua Lu jing Zhao Qiang School of Computer and Communication Engineering Qinhuangdao Branch of Northeast UniversityQinhuangdao 066000China

With the expansion of wind speed data sets, decreasing model training time is of great significance to the time cost of wind speed prediction. And imperfection of the model evaluation system also affect the wind speed prediction. To address these challenges, a hybrid method based on feature extraction, nested shared weight long short-term memory(NSWLSTM) network and Gaussian process regression(GPR) was proposed. The feature extraction of wind speed promises the best performance of the model. NSWLSTM model reduces the training time of long short-term memory(LSTM) network and improves the prediction accuracy. Besides, it adopted a method combined NSWLSTM with GPR(NSWLSTM-GPR) to provide the probabilistic prediction of wind speed. The probabilistic prediction can provide information that deviates from the predicted value, which is conducive to risk assessment and optimal scheduling. The simulation results show that the proposed method can obtain high-precision point prediction, appropriate prediction interval and reliable probabilistic prediction results with shorter training time on the wind speed prediction.

关键词： wind speed prediction feature extraction long short-term memory(LSTM)network shared weight forecast uncertainty

Prognostic value of T cell immunoglobulin and mucin-domain containing-3 expression in upper gastrointestinal tract tumors:A meta-analysis

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World Journal of Gastrointestinal Oncology 2023年第12期15卷 2212-2224页

作者： jing-jing Yan Bing-Bing Liu Yan Yang meng-Ru Liu han Wang Zhen-Quan Deng Zhi-Wei Zhang College of Clinical Medicine Hebei University of EngineeringHandan 056000Hebei ProvinceChina Department of Oncology Handan First HospitalHandan 056002Hebei ProvinceChina Department of Oncology Affiliated Hospital of Hebei University of EngineeringHandan 056000Hebei ProvinceChina

BACKGROUND There is a lack of robust prognostic markers for upper gastrointestinal(GI)tract cancers,including esophageal,gastric,and esophagogastric junction cancers.T cell immunoglobulin and mucin-domain containing-3(TIM3)plays a key immunomodulatory role and is linked to the prognosis of various ***,the significance of TIM3 in upper GI tract tumors is still *** To investigate the prognostic value of TIM3 expression in upper GI tract *** A literature search was conducted on the PubMed,Embase,and Web of Science databases for relevant studies published until June *** screening and quality assessment,studies that met the criteria were included in the *** methods were used for the pooled analysis to assess the association of TIM3 expression in upper GI tract tumors with the prognosis and clinicopathological *** results were reported with the hazard ratio(HR)and 95%confidence interval(CI).RESULTS Nine studies involving 2556 patients with upper GI tract cancer were *** TIM3 expression was associated with a worse prognosis in upper GI tract cancer(HR:1.17,95%CI:1.01-1.36).Positive expression of TIM3 in gastric cancer was correlated with the T and N stage,but the difference was not statistically ***,TIM3 overexpression was significantly correlated with the TNM stage(odds ratio:1.21,95%CI:0.63-2.33;P<0.05).TIM3 expression showed no association with the other clinicopathological *** High expression of TIM3 in the upper GI tract cancer is associated with a worse prognosis and advanced T or N stages,indicating its potential value as a prognostic *** findings may provide a basis for the personalized treatment of upper GI tract cancers.

关键词： Immune checkpoint T cell immunoglobulin-3 Upper gastrointestinal tract cancer Overall survival Clinicopathological features

Acupuncture improved lipid metabolism by regulating intestinal absorption in mice

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World Journal of Gastroenterology 2020年第34期26卷 5118-5129页

作者： Jia han Xin Guo Xiang-Jin meng jing Zhang Reimon Yamaguchi Yoshiharu Motoo Sohsuke Yamada Department of Pathology and Laboratory Medicine Kanazawa Medical UniversityIshikawa 920-0293Japan Department of Oncology Kanazawa Medical UniversityIshikawa 920-0293Japan Department of Pathology Kanazawa Medical University HospitalIshikawa 920-0293Japan Department of Dermatology Kanazawa Medical UniversityIshikawa 920-0293Japan

BACKGROUND Non-alcoholic fatty liver disease(NAFLD),in which abnormal lipid metabolism plays an important role in disease progression,has become a *** lipid metabolism,for example an increased fat intake,has been thought to be an initial factor leading to *** small intestine is the main site of dietary lipid absorption.A number of clinical trials have shown that acupuncture has positive effects in the regulation of lipid metabolism,which is closely associated with the progression of *** therefore hypothesized that,acupuncture can improve the conditions of NAFLD by regulating intestinal absorption of *** To study the role of acupuncture treatment in the improvement of metabolic syndrome secondary to NAFLD by mouse *** 8-wk-old male C57BL/6J mice were fed a methionine-and choline-deficient diet for 3 ***,all mice were separated randomly into acupoints group(AG)or non-acupoints group(NG)with high fat diet *** treatment was performed at Zu san li,Guan yuan and Yong quan acupoints as acupuncture treatment to AG mice while non-acupoints place to NG ***,mice were anesthetized with an injection of ketamine-medetomidine and euthanized by *** An apparent improvement of obesity was found in AG mice after acupuncture *** AG mice,the body weight was much lower(22.6±1.2 g vs 28.1±1.0 g,P<0.005)in comparison to NG *** length of small intestine in AG mice was significantly shorter(26.7±2.3 cm vs 32.7±2.7 cm,P<0.005).A large amount of chyme was observed in the lumen of the AG small *** expression of microsomal triglyceride transfer protein,apolipoprotein B and apolipoprotein C2 was ***(TGs),total cholesterol and nonesterified fatty acid(NEFA)levels of the small intestinal tissue were significantly higher in AG mice,but the serum TGs and NEFA levels were reduced in AG *** These results indicate that acupuncture at Zu san li,Guan yuan and

关键词： Acupuncture Non-alcoholic fatty liver disease Small intestine Lipid metabolism Apolipoproteins

Crystal Structure of the 1:2 Stoichiometric Nd: [α-SiW_(11)O_(39)]^(8-): K_5Na_5H_3[Nd(α-SiW_(11)O_(39))_2]·6H_2O

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Chinese Journal of Structural Chemistry 2007年第2期26卷 234-238页

作者： han Qiu-Xia WANG jing-Ping NIU jing-Yang Basic Experiment Teaching Center Henan University Kaifeng 475001 China Institute of Molecular and Crystal Engineering School of Chemistry and Chemical Engineering Henan University Kaifeng 475001 China

Single-crystal X-ray structural analysis of K5Na5H3[Nd（α-SiW11O39）2]·6H2O （triclinic, space group P1^-, a = 13.7738（10）, b = 19.722（2）, c = 20.6647（15） A, α = 111.0090（10）, β = 105.1740（10）, y = 98.6870（10）°, Z = 2, V = 4867.2（8）, Mr = 5914.40, Dc = 4.026,μ = 26.754 mm^-1, F（000） = 5076, R = 0.0750 and wR = 0.2077） reveals that two [α-SiW11O39]^8- moieties are connected through one Nd atom which is in a square antiprismatic coordination environment by eight oxygen atoms from two [α-SiW11O391]^8- moieties. The Nd（Ⅲ） ion is substituted for a [WO]^4＋ unit in the ＂cap＂ region of the tungsten-oxygen framework of the parent Keggin ion. Disordered Na^＋ cations and water molecules reside outside these channels, leaving empty pores with an intersecting slot （13 A × 10 A）.

关键词： crystal structure characterization polyoxometalates

Efficiency of Different Methods for dsRNA Delivery in Cotton Bollworm(Helicoverpa armigera)

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Journal of Integrative Agriculture 2014年第1期13卷 115-123页

作者： YANG jing han Zhao-jun Key Laboratory of Integrated Management of Crop Diseases and Pests Ministry of Education/College of Plant ProtectionNanjing Agricultural University

RNAi trigged by dsRNA not only facilitates the development of molecular biology, but also initiates a new way for pest control by silence of fatal genes. However, one of the key limitations in pest control is lack of the convenient and efficient method for dsRNA delivery. In this study, different dsRNA delivery methods at their own optimum conditions were evaluated comparatively for their efficiency with Helicoverpa armigera as test animal. It was found that the popular one- time injection of larvae with dsRNA could reduce the pupation rate by 43.0% and enhance larva mortality by 11.7%. One- time ingestion of dsRNA did not result in any significant effect on phenotype. Continuous ingestion of in vitro synthesized dsRNA by refreshing the bait diet every day caused 40.4% decrease in successful pupation and 10.0% increase in larval mortality, which was similar as one-time injection. The most efficient method was found to be the continuous ingestion of the bacteria containing dsRNA expressed, which reduced the rate of pupation by 68.7% and enhanced the larval mortality by 34.1%. Further analysis found that dsRNA was degraded faster in midgut juice than in hemolymph. However, the cell of bacteria could protect dsRNA and delay the degradation in the midgut juice of H. armigera. These results throw light on the application of dsRNA in pest management with proper ways.

关键词： Helicoverpa armigera dsRNA delivery methods RNAi effect pest control