AlCl3-mediated cleavage of ethereal methyl–oxygen bond in aroylated 2,7-dimethoxynaphthalene compounds proceeds chemospecifically and regioselectively. The ethereal bond at the β(2)-position of 1-monoaroylated 2,7-d...AlCl3-mediated cleavage of ethereal methyl–oxygen bond in aroylated 2,7-dimethoxynaphthalene compounds proceeds chemospecifically and regioselectively. The ethereal bond at the β(2)-position of 1-monoaroylated 2,7-dimethoxynaphthalene is cleaved readily and predominantly against the β(7)-position, whereas scission of β-ethereal bonds of 1,8-diaroylated 2,7-dimethoxynaphthalene hardly undergoes like the non-aroylated mother frame compound of 2,7-dimethoxynaphthalene.展开更多
Unmanned and aerial systems as interactors among different system components for communications,have opened up great opportunities for truth data discovery in Mobile Crowd Sensing(MCS)which has not been properly solve...Unmanned and aerial systems as interactors among different system components for communications,have opened up great opportunities for truth data discovery in Mobile Crowd Sensing(MCS)which has not been properly solved in the literature.In this paper,an Unmanned Aerial Vehicles-supported Intelligent Truth Discovery(UAV-ITD)scheme is proposed to obtain truth data at low-cost communications for MCS.The main innovations of the UAV-ITD scheme are as follows:(1)UAV-ITD scheme takes the first step in employing UAV joint Deep Matrix Factorization(DMF)to discover truth data based on the trust mechanism for an Information Elicitation Without Verification(IEWV)problem in MCS.(2)This paper introduces a truth data discovery scheme for the first time that only needs to collect a part of n data samples to infer the data of the entire network with high accuracy,which saves more communication costs than most previous data collection schemes,where they collect n or kn data samples.Finally,we conducted extensive experiments to evaluate the UAV-ITD scheme.The results show that compared with previous schemes,our scheme can reduce estimated truth error by 52.25%–96.09%,increase the accuracy of workers’trust evaluation by 0.68–61.82 times,and save recruitment costs by 24.08%–54.15%in truth data discovery.展开更多
Chinese Education Philosophy of "Truth, Kindness, and Aesthetics Combination" manifests in the research on Chinese education from aesthetics perspective. It aims at the "narrow and limited view" of...Chinese Education Philosophy of "Truth, Kindness, and Aesthetics Combination" manifests in the research on Chinese education from aesthetics perspective. It aims at the "narrow and limited view" of "not the general aesthetics, but the artistic beauty only", and it aims at biased opinion of "the interest saying", "the fine arts saying", "the esthetic sense saying" on aesthetics. It also aims at serious distraction of "LEFT in form but RIGHT in essence" of the mainstream ideology "the thought", "the revolution", "politics" and so on. It is a complex study of Chinese education from the philosophy of the unity of Truth, Kindness, and Aesthetics of oriental aesthetics, the consensus of Truth, Kindness, and Aesthetics of Western aesthetics, and the identity of Truth, Kindness, and Aesthetics of Marx aesthetics. From aesthetics perspective, it studies Chinese education, "combing" the reversed relationships among "truth", "kindness" and "aesthetics" in Chinese, adopting the methods of "research with great ease", "cases study", and "combination of ration and perception", to achieve "truth" of in Chinese, "kindness" of and "aesthetics" of , promote the development of "Chinese intellectual education", "Chinese moral education", and "Chinese aesthetic education" harmoniously, to realize the "Truth, Kindness, and Aesthetics Combination" of Chinese education and to reach the brand-new boundary territory of "human development and integrity construction" effectively.展开更多
The electrochemical surface area (ESA) of the half-membrane electrode assembly (HMEA) and dimethyl-ether (DME) electrooxidation on the HMEA were examined by cyclic voltammetry (CV). The ESAs of the electrode before an...The electrochemical surface area (ESA) of the half-membrane electrode assembly (HMEA) and dimethyl-ether (DME) electrooxidation on the HMEA were examined by cyclic voltammetry (CV). The ESAs of the electrode before and after DME electrooxidation were calculated from the integrated charge during the adsorption (and/or desorption) of atomic hydrogen minus the charge for the double layer charging in 0.5 mol·L-1 H2SO4. The increase in ESA was observed, and this was attributed to the change of catalyst layer structure, leading to a more effective contact between catalysts and the electrolyte Nafion.展开更多
[Objectives]To establish a thin-layer chromatography(TLC)method for the determination of rubiadin-1-methyl ether in Yao Medicine Chuanlianzhu(Damnacanthus giganteus).[Methods]A silica gel G thin-layer plate was adopte...[Objectives]To establish a thin-layer chromatography(TLC)method for the determination of rubiadin-1-methyl ether in Yao Medicine Chuanlianzhu(Damnacanthus giganteus).[Methods]A silica gel G thin-layer plate was adopted for TLC.Petroleum ether(60-90℃)-chloroform-methanol-water(7:15:3:1)was used as the developing solvent and inspected under ultraviolet lamp(365 nm).The content was determined by Inertsil ODS-3 C 18 column(4.60 mm×250 mm,5μm),mobile phase:acetonitrile-0.2%phosphoric acid gradient elution,detection wavelength 277 nm,flow rate 1.0 mL/min,column temperature 30℃,injection volume 10μL.[Results]The spots of 10 Chuanlianzhu samples from different origins showed the same color at the same position as the control,and the spots were clear and specific.The injection volume of rubiadin-1-methyl ether showed a good linear relationship in the range of 2.90-145μg(R=0.9996).The average recovery rate of rubiadin-1-methyl ether in the low,medium and high dose groups of Yao Medicine Chuanlianzhu was 98.72%,and RSD=1.78%.[Conclusions]This method can effectively identify Yao Medicine Chuanlianzhu medicinal materials and accurately determine the content of rubiadin-1-methyl ether in the medicinal materials.It provides a scientific basis for the development and utilization of Yao Medicine Chuanlianzhu medicinal resources.展开更多
文摘AlCl3-mediated cleavage of ethereal methyl–oxygen bond in aroylated 2,7-dimethoxynaphthalene compounds proceeds chemospecifically and regioselectively. The ethereal bond at the β(2)-position of 1-monoaroylated 2,7-dimethoxynaphthalene is cleaved readily and predominantly against the β(7)-position, whereas scission of β-ethereal bonds of 1,8-diaroylated 2,7-dimethoxynaphthalene hardly undergoes like the non-aroylated mother frame compound of 2,7-dimethoxynaphthalene.
基金supported by the National Natural Science Foundation of China under Grant No.62072475.
文摘Unmanned and aerial systems as interactors among different system components for communications,have opened up great opportunities for truth data discovery in Mobile Crowd Sensing(MCS)which has not been properly solved in the literature.In this paper,an Unmanned Aerial Vehicles-supported Intelligent Truth Discovery(UAV-ITD)scheme is proposed to obtain truth data at low-cost communications for MCS.The main innovations of the UAV-ITD scheme are as follows:(1)UAV-ITD scheme takes the first step in employing UAV joint Deep Matrix Factorization(DMF)to discover truth data based on the trust mechanism for an Information Elicitation Without Verification(IEWV)problem in MCS.(2)This paper introduces a truth data discovery scheme for the first time that only needs to collect a part of n data samples to infer the data of the entire network with high accuracy,which saves more communication costs than most previous data collection schemes,where they collect n or kn data samples.Finally,we conducted extensive experiments to evaluate the UAV-ITD scheme.The results show that compared with previous schemes,our scheme can reduce estimated truth error by 52.25%–96.09%,increase the accuracy of workers’trust evaluation by 0.68–61.82 times,and save recruitment costs by 24.08%–54.15%in truth data discovery.
文摘Chinese Education Philosophy of "Truth, Kindness, and Aesthetics Combination" manifests in the research on Chinese education from aesthetics perspective. It aims at the "narrow and limited view" of "not the general aesthetics, but the artistic beauty only", and it aims at biased opinion of "the interest saying", "the fine arts saying", "the esthetic sense saying" on aesthetics. It also aims at serious distraction of "LEFT in form but RIGHT in essence" of the mainstream ideology "the thought", "the revolution", "politics" and so on. It is a complex study of Chinese education from the philosophy of the unity of Truth, Kindness, and Aesthetics of oriental aesthetics, the consensus of Truth, Kindness, and Aesthetics of Western aesthetics, and the identity of Truth, Kindness, and Aesthetics of Marx aesthetics. From aesthetics perspective, it studies Chinese education, "combing" the reversed relationships among "truth", "kindness" and "aesthetics" in Chinese, adopting the methods of "research with great ease", "cases study", and "combination of ration and perception", to achieve "truth" of in Chinese, "kindness" of and "aesthetics" of , promote the development of "Chinese intellectual education", "Chinese moral education", and "Chinese aesthetic education" harmoniously, to realize the "Truth, Kindness, and Aesthetics Combination" of Chinese education and to reach the brand-new boundary territory of "human development and integrity construction" effectively.
文摘The electrochemical surface area (ESA) of the half-membrane electrode assembly (HMEA) and dimethyl-ether (DME) electrooxidation on the HMEA were examined by cyclic voltammetry (CV). The ESAs of the electrode before and after DME electrooxidation were calculated from the integrated charge during the adsorption (and/or desorption) of atomic hydrogen minus the charge for the double layer charging in 0.5 mol·L-1 H2SO4. The increase in ESA was observed, and this was attributed to the change of catalyst layer structure, leading to a more effective contact between catalysts and the electrolyte Nafion.
基金Supported by State Administration of Traditional Chinese Medicine High-level Key Discipline Construction Project of Traditional Chinese Medicine-Ethnic Minority Pharmacy (Zhuang Pharmacy) (zyyzdxk-2023165)General Scientific Research Program of Guangxi University of Chinese Medicine in 2020 (2020MS063)+4 种基金Key R&D Project of Guangxi Science and Technology Department (Guike AB21196057)Young Talent Cultivation Program of Guangxi International Zhuang Medicine Hospital (2022001)Funding Project of High-level Talent Cultivation and Innovation Team of Guangxi University of Chinese Medicine (2022A008)Guangxi Traditional Chinese Medicine Interdisciplinary Innovation Team Project (GZKJ2309)State Administration of Traditional Chinese Medicine"Twelfth Five-Year Plan"Key Discipline of Traditional Chinese Medicine (Ethnic Pharmacy)Zhuang Pharmacy.
文摘[Objectives]To establish a thin-layer chromatography(TLC)method for the determination of rubiadin-1-methyl ether in Yao Medicine Chuanlianzhu(Damnacanthus giganteus).[Methods]A silica gel G thin-layer plate was adopted for TLC.Petroleum ether(60-90℃)-chloroform-methanol-water(7:15:3:1)was used as the developing solvent and inspected under ultraviolet lamp(365 nm).The content was determined by Inertsil ODS-3 C 18 column(4.60 mm×250 mm,5μm),mobile phase:acetonitrile-0.2%phosphoric acid gradient elution,detection wavelength 277 nm,flow rate 1.0 mL/min,column temperature 30℃,injection volume 10μL.[Results]The spots of 10 Chuanlianzhu samples from different origins showed the same color at the same position as the control,and the spots were clear and specific.The injection volume of rubiadin-1-methyl ether showed a good linear relationship in the range of 2.90-145μg(R=0.9996).The average recovery rate of rubiadin-1-methyl ether in the low,medium and high dose groups of Yao Medicine Chuanlianzhu was 98.72%,and RSD=1.78%.[Conclusions]This method can effectively identify Yao Medicine Chuanlianzhu medicinal materials and accurately determine the content of rubiadin-1-methyl ether in the medicinal materials.It provides a scientific basis for the development and utilization of Yao Medicine Chuanlianzhu medicinal resources.
