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Assessment of land degradation in Inner Mongolia between 2000 and 2020 based on remote sensing data

Geography and Sustainability 2023年第2期4卷 100-111页

作者： Linlin Zhao kun jia Xin Liu Jie Li Mu Xia State Key Laboratory of Remote Sensing Science Faculty of Geographical ScienceBeijing Normal UniversityBeijing 100875China Beijing Engineering Research Center for Global Land Remote Sensing Products Faculty of Geographical ScienceBeijing Normal UniversityBeijing 100875China Geological Survey of Inner Mongolia HohhotInner Mongolia 010020China

Achieving land degradation neutrality(LDN)worldwide is a significant target of the Sustainable Development Goal(SDG15.3).Inner Mongolia,as a typical dryland region in northern China,has carried out several large-scale ecological restoration programs to combat land ***,there is a lack of comprehensive assess-ment of its land degradation situation after ecological programs implementation,which is of great significance to supporting SDG15.3 in *** study analyzed the land degradation situation using the improved SDG15.3.1 calculation framework based on fine resolution data in Inner Mongolia from 2000 to 2020,and finally compre-hensively evaluated the land status of the whole region and those subject to ecological *** results show that net land restoration proportion of various ecological project regions and whole region continues to *** scope of the Grain for Green Program(GGP)had the largest proportion of net land restoration while the Natural Reserve Program(NRP)had the lowest proportion from 2000 to *** net land restoration area of Inner Mongolia during 2000-2010 and 2010-2020 was 35,800 km 2 and 65,300 km 2,***,Inner Mongolia has achieved statistically zero growth in land degradation under the governance of ecological restora-tion ***,reasonable planning,well monitoring,and timely assessment of ecological restoration programs are crucial to support SDG15.3.

关键词： SDG15.3 Land degradation neutrality(LDN) Land degradation Ecological programs Inner Mongolia

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Cataract-causing allele in CRYAA(Y118D)proceeds through endoplasmic reticulum stress in mouse model

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Zoological Research 2021年第3期42卷 300-309页

作者： Zhe-kun jia Chen-Xi Fu Ai-Ling Wang Ke Yao Xiang-Jun Chen Eye Center of the Second Affiliated Hospital Zhejiang University School of MedicineHangzhouZhejiang 310009China Institute of Translational Medicine Zhejiang University School of MedicineHangzhouZhejiang 310020China

As small heat shock proteins,α-crystallins function as molecular chaperones and inhibit the misfolding and aggregation ofβ/γ-*** mutations of CRYAA are associated with protein aggregation and cataract *** possible process underlying cataract formation is that endoplasmic reticulum stress(ERS)induces the unfolded protein response(UPR),leading to ***,the pathogenic mechanism related to this remains ***,we successfully constructed a cataract-causing CRYAA(Y118D)mutant mouse model,in which the lenses of the CRYAA-Y118D mutant mice showed severe posterior rupture,abnormal morphological changes,and aberrant arrangement of crystallin *** analysis was consistent with the clinical pathological *** also explored the pathogenic factors involved in cataract development through transcriptome *** addition,based on key pathway analysis,up-regulated genes in CRYAAY118D mutant mice were implicated in the ERS-UPR *** study showed that prolonged activation of the UPR pathway and severe stress response can cause proteotoxic and ERS-induced cell death in CRYAA-Y118D mutant mice.

关键词： Cataract αA-crystallin Unfolded protein response Endoplasmic reticulum stress

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The comparison of survival between active surveillance or watchful waiting and focal therapy for low-risk prostate cancer:a real-world study from the SEER database

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Asian Journal of Andrology 2022年第3期24卷 305-310页

作者： Qi-Ming Yuan Tian-Hai Lin kun Jin Shi Qiu Xiang-Hong Zhou Di Jin jia-kun Li Lu Yang Qiang Wei Department of Urology Institute of UrologyWest China Hospital of Sichuan UniversityChengdu 610041China

To reduce treatment-related side effects in low-risk prostate cancer(PCa),both focal therapy and deferred treatments,including active surveillance(AS)and watchful waiting(WW),are worth considering over radical prostatectomy(RP).Therefore,this study aimed to compare long-term survival outcomes between focal therapy and AS/*** were obtained and analyzed from the Surveillance,Epidemiology,and End Results(SEER)*** with low-risk PCa who received focal therapy or AS/WW from 2010 to 2016 were *** therapy included cryotherapy and laser *** Cox proportional hazards models were used to compare overall mortality(OM)and cancer-specific mortality(CSM)between AS/WW and focal therapy,and propensity score matching(PSM)was performed to reduce the influence of bias and unmeasured confounders.A total of 19292 patients with low-risk PCa were included in this *** multivariate Cox proportional hazards model analysis,the risk of OM was higher in patients receiving focal therapy than those receiving AS/WW(hazard ratio[HR]=1.35,95%confidence interval[CI]:1.02–1.79,P=0.037),whereas no significant difference was found in CSM(HR=0.98,95%CI:0.23–4.11,P=0.977).After PSM,the OM and CSM of focal therapy and AS/WW showed no significant differences(HR=1.26,95%CI:0.92–1.74,P=0.149;and HR=1.26,95%CI:0.24–6.51,P=0.782,respectively).For patients with low-risk PCa,focal therapy was no match for AS/WW in decreasing OM,suggesting that AS/WW could bring more overall survival benefits.

关键词： active surveillance cancer-specific mortality focal therapy low-risk prostate cancer overall mortality watchful waiting

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Ring opening of sugar-derived epoxides by TBAF/KHF_2:An attractive alternative for the introduction of fluorine into the carbohydrate scaffold

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Chinese Chemical Letters 2017年第2期28卷 467-470页

作者： Nan Yan Zhi-Wei Lei jia-kun Su Wei-Lin Liao Xiang-Guo Hu National Engineering Research Center for Carbohydrate Synthesis Jiangxi Normal University Center of R&D China Tobacco Jiangxi Industrial Co. Ltd.

A stable and commercially available reagent mixture,composed of tetrabutylammonium bifluoride/potassium bifluoride（TBAF/KHF_2）,was found to be effective for the nucleophilic ring opening reactions of sugar-derived epoxides with *** sugar-derived epoxide precursors,including 1-thioglycosides can be ring-opened to afford fluorinated carbohydrate products in high yields and in short reaction times.

关键词： Carbohydrate Fluorinated carbohydrate Fluoro-sugar Organofluorine Epoxide

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Land use and land cover classification using Chinese GF-2 multispectral data in a region of the North China Plain

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Frontiers of Earth Science 2019年第2期13卷 327-335页

作者： kun jia Jingcan LIU Yixuan TU Qiangzi LI Zhiwei SUN Xiangqin WEI Yunjun YAO Xiaotong ZHANG State Key Laboratory of Remote Sensing Science Jointly Sponsored by Beijing Normal University and Institute of Remote Sensing and Digital Earth of Chinese Academy of SciencesBeijing 100875China Beijing Engineering Research Center for Global Land Remote Sensing Products Faculty of Geographical ScienceBeijing Normal UniversityBeijing 100875China Institute of Remote Sensing and Digital Earth Chinese Academy of SciencesBeijing 100101China Beijing Geoway Times Software Technology Co. Ltd.Beijing 100043China

The newly launched GF-2 satellite is now the most advanced civil satellite in China to collect high spatial resolution remote sensing *** study investigated the capability and strategy of GF?2 multispectral data for land use and land cover (LULC) classification in a region of the North China *** pixel-based and object-based classifications using maximum likelihood (MLC) and support vector machine (SVM) classifiers were evaluated to determine the classification strategy that was suitable for GF?2 multispectral *** validation results indicated that GF-2 multispectral data achieved satisfactory LULC classification performance,and object-based classification using the SVM classifier achieved the best classification accuracy with an overall classification accuracy of 94.33% and kappa coefficient of ***,considering the LULC classification performance and data characteristics,GF-2 satellite data could serve as a valuable and reliable high-resolution data source for land surface *** works should focus on improving LULC classification accuracy by exploring more classification features and exploring the potential applications of GF-2 data in related applications.

关键词： land use and land cover classification GF-2 North China Plain multispectral data

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A review and comparison of surface incident shortwave radiation from multiple data sources: satellite retrievals, reanalysis data and GCM simulations

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International Journal of Digital Earth 2023年第1期16卷 1332-1357页

作者： Shuyue Yang Xiaotong Zhang Shikang Guan Wenbo Zhao Yanjun Duan Yunjun Yao kun jia Bo jiang Faculty of Geographical Science State Key Laboratory of Remote Sensing ScienceBejjing Normal UniversityBejjingPeople's Republic of China

Surface incident shortwave radiation(Rs)can promote the circulation of substance and energy,and the accuracy of its estimation is of great significance for climate *** Rs can be acquired from satellite retrievals,reanalysis predictions and general circulation model(GCM)*** Rs estimates have been evaluated and compared in previous studies,most of them focus on evaluating the Rs estimates over specific regions using ground measurements from limited ***,it is essential to comprehensively validate Rs estimates from multiple data *** this study,ground measurements of 690 stations from BSRN,GEBA,CMA,GC-NET and buoys were employed to validate the Rs estimates from seven representative products(GLASS,GEWEX-SRB,CERES-EBAF,ERA5,MERRA2,CFSR and CMIP6).The validation results indicated that the selected products overestimated Rs globally,with biases ranged from 0.48 to 21.27 W/m^(2).The satellite retrievals showed relatively better accuracy among seven datasets compared to ground measurements at the selected ***,the selected seven products were all in poor accuracy at high-latitude regions with RMSEs greater than 50 W/m^(2).The long-term variation trends were also analyzed in this study.

关键词： Downward shortwave radiation satellite reanalysis general circulation model

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Enantioselective trapping of oxonium ylide intermediates by N-benzhydryl-α-imino ester：Synthesis of β-tetrasubstituted α-amino acids

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Chinese Chemical Letters 2017年第2期28卷 213-217页

作者： Shi-kun jia Yu-Bing Lei Long-Long Song Shun-Ying Liu Wen-Hao Hu Shanghai Engineering Research Center of Molecular Therapeutics and New Drug Development School of Chemistry and Chemical Engineering East China Normal University Shanghai 200062 China

A synergistic rhodium（Ⅱ）/phosphoric acid catalyzed three component reaction of 3-diazooxindoles,alcohols and N-benzhydryl-α-imino ester is developed for the efficient construction of chiral β-alkoxy C-β-tetrasubstituted α-amino acid derivatives in good yields and with excellent diastereoselectivities and high *** synthetic application of the resulting products was illustrated by reducing with Pd/C under H_2 atmosphere followed reacting with CSCl_2 at room temperature to rapid afford 3-spirocyclic oxindole in a good yield with a chirality *** three-component reaction is proposed to proceed through an electrophilic trapping of the oxonium ylides by N-benzhydryl-α-imino ester.

关键词： Three-component reaction Oxonium ylide N-Benzhydryl-α-imino ester β-Tetrasubstituted α-amino acids Chiral phosphoric acid

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Production of functional sperm from in vitro-cultured premeiotic spermatogonia in a marine fish

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Zoological Research 2022年第4期43卷 537-551页

作者： Hong Zhang Wan-Wan Zhang Cheng-Yu Mo Meng-Dan Dong kun-Tong jia Wei Liu Mei-Sheng Yi School of Marine Sciences Sun Yat-Sen UniversityGuangzhouGuangdong 510275China Southern Marine Science and Engineering Guangdong Laboratory(Zhuhai) ZhuhaiGuangdong 519000China Guangdong Provincial Key Laboratory of Marine Resources and Coastal Engineering GuangzhouGuangdong 510000China

In vitro production of functional gametes can revolutionize reproduction by reducing generation intervals and accelerating genetic breeding in aquaculture,especially in fish with relatively long ***,functional sperm production from in vitro-cultured spermatogonia remains a challenge in most aquaculture *** this study,we isolated and characterized premeiotic spermatogonia from marine four-eyed sleepers(Bostrychus sinensis),which are prone to ovotesticular or sterile testicular development,and induced the differentiation of the spermatogonia into flagellated sperm in a three-dimensional(3D)culture *** insemination indicated that the in vitro-derived sperm were capable of fertilizing mature oocytes to develop into normal ***,melatonin significantly promoted spermatogonia proliferation and differentiation through the ERK1/2 signaling pathway,and thus increased the efficiency in functional sperm *** 3D culture system and resulting functional sperm hold great promise for improving the genetic breeding of aquaculture fish.

关键词： In vitro spermatogenesis 3D culture model Spermatogonia Four-eyed sleeper Melatonin Genetic breeding

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China Announces Six Major Archaeological Finds 2010

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China & The World Cultural Exchange 2011年第5期77卷 6-9页

作者： jia kun

On January 11, 2011, the Chinese Academy of Social Sciences (CASS) announced six annual major archaeological finds in 2010. They include the ceramic kiln site of the

关键词：中国社科院出土文物 CASS 考古发现

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King Gesar Returns to Enlighten Olympic Visitors

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China & The World Cultural Exchange 2008年第10期74卷 28-31页

作者： jia kun

From July 30 to August 30,2008, China Association for the Protection and Promotion of Tibetan Culture and Ganzi Tibetan Autonomous Prefecture of Sichuan Province co-hosted an exhibition that presents hundreds of Thangka paintings portraying stories of the central epic poem of Tibet,The Epic of King Gesar,in the Ethnic Culture Palace in Beijing.

关键词：格萨尔西藏绘画作品画展

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