The weapons system portfolio selection problem arises at the equipment demonstration stage and deals with the military application requirements.Further,the contribution rate of the system is one of the important indic...The weapons system portfolio selection problem arises at the equipment demonstration stage and deals with the military application requirements.Further,the contribution rate of the system is one of the important indicators to evaluate the role of a system,which can facilitate the weapons system portfolio selection.Therefore,combining the system contribution rate with system portfolio selection is the focus of this study.It also focuses on calculating the contribution rates of multiple equipment systems with various types of capabilities.The contribution rate is measured by establishing a hierarchical multi-criteria value model from three dimensions.Based on the value model,the feasible portfolios are developed under certain cost constraints and the optimal weapons system portfolios are obtained by using the classification optimization selection strategy.Finally,an illustrative example is presented to verify the feasibility of the proposed model.展开更多
Management under ecological schemes and increasing habitat heterogeneity,are essential for enhancing biodiversity in vineyards.Birds provide several contributions to agriculture,for example pest control,recreation and...Management under ecological schemes and increasing habitat heterogeneity,are essential for enhancing biodiversity in vineyards.Birds provide several contributions to agriculture,for example pest control,recreation and enhancing human mental health,and have intrinsic value.Birds are also ideal model organisms because they are easy to survey,and species respond differently to agricultural land use at different scales.Vegetated borders of crops are key for many species of birds,and distance to the border have been found to be an important factor in vineyard-dominated agroecosystems.We evaluate if there are differences in the bird assemblage,between the interior compared to borders within vineyards,using a hierarchical community occupancy model.We hypoth-esized that occupancy of birds is greater in environments with greater heterogeneity,which in this study was considered to be contributed by the proximity to vegetated corridors.We expected that vineyard borders close to corridors will have higher bird occupancy than the center of the vineyard.The research was conducted in three vineyards with biodiversity-friendly management practices,in Gualtallary,Mendoza,Argentina.Bird surveys were conducted over three breeding seasons from 2018 to 2020.Occupancy and richness of the bird community was more closely associated with the borders adjacent to the corridors than with the interior of the vineyards,as we initially predicted,although the assemblage of birds did not differ much.More than 75%of the registered species consume exclusively or partially invertebrates.Biodiversity-friendly management and ecological schemes,together with vegetated corridors provide multiple benefits for biodiversity conservation.These ap-proaches not only minimize the use of agrochemicals but also prioritize soil cover with spontaneous vegetation,which supports a diverse community of insectivorous bird species,potentially contributing to pest control.展开更多
Over the past 70 years since the founding of the People’s Republic of China,great changes have been seen in the financial industry in terms of its nature,function,scale,structure and other features.It has experienced...Over the past 70 years since the founding of the People’s Republic of China,great changes have been seen in the financial industry in terms of its nature,function,scale,structure and other features.It has experienced six stages of development,namely,inception and consolidation,arduous growth,exploration and restructuring,segmentation,fictitious economy orientation,and real economy promotion and risk prevention.The tremendous success and useful experience made during this period have largely bolstered the prosperity and stability of the Chinese economy,improved Chinese people’s living standards,and exerted a profound impact on China’s economy and society.Based on its development pattern,the Chinese financial sector will expect further openingup at home and abroad and a growing capacity in serving the real economy,while new business forms and models will emerge rapidly and stronger preventive measures against financial risks will be needed.In response to the financial development in the new era,proactive and pragmatic measures need to be in place to safeguard the stable and sound development of the financial industry.展开更多
Over the past decade,nine separate gene therapy clinical trials for advanced Parkinson’s disease（PD）have been launched and completed,involving the dosing of nearly 12-dozen PD volunteers who incurred significant ri...Over the past decade,nine separate gene therapy clinical trials for advanced Parkinson’s disease（PD）have been launched and completed,involving the dosing of nearly 12-dozen PD volunteers who incurred significant risks to hopefully reduce symptoms and gain a better life.展开更多
The Third "Brother Cup" China International Young Designers Contest was held in April 1995 at the Century Theatre in the Beijing Sino-Japanese Youth Exchange Centre. The Contest, an important activity at the...The Third "Brother Cup" China International Young Designers Contest was held in April 1995 at the Century Theatre in the Beijing Sino-Japanese Youth Exchange Centre. The Contest, an important activity at the ’95 China International Clothing and Accessories Fair, is the largest one in the world at present with designers from many countries and regions. Recently I interviewed the sponsor of the contest—展开更多
I.Introduction This year marks the 70th anniversary of the People’s Republic of China.Consequently,this is a suitable moment to reflect on the contributions made by China to international human rights.Seventy years i...I.Introduction This year marks the 70th anniversary of the People’s Republic of China.Consequently,this is a suitable moment to reflect on the contributions made by China to international human rights.Seventy years is a very long time,and much has happened during this period.Therefore,such a review by definition needs to be selective.展开更多
Human rights are the rights and freedoms of humans in their nature, and represent the basic conditions for the free and complete development of the humankind. The educational develop- ment level is an important mark o...Human rights are the rights and freedoms of humans in their nature, and represent the basic conditions for the free and complete development of the humankind. The educational develop- ment level is an important mark of the level of realization of human rights. China＇s higher education realized the historic development in the 1998- 2007 period, and the number of the enrolled students at common colleges and universities across the nation had exploded from 3.4 million to 18.85 million, the number one in the world.展开更多
China has a population that is one-fifth of humanity. Most of its people live in rural areas. This country has been built and developed on the ruins of semi-colonialism and semi-feudalism and on a foundation of ＂pove...China has a population that is one-fifth of humanity. Most of its people live in rural areas. This country has been built and developed on the ruins of semi-colonialism and semi-feudalism and on a foundation of ＂poverty and blankness.＂ The founding of New China created the political condition for the advancement of people＇s democracy. Since the adoption of reform and open policies, or gaige kaifang, China has gradually found an effective way, suited for Chinese conditions,展开更多
Huntington’s disease（HD）is an autosomal dominant,monogenic,progressive,neurodegenerative and rare disease with a frequency of10 per 100,000 in the Caucasian population and occurring more rarely in other races（Squi...Huntington’s disease（HD）is an autosomal dominant,monogenic,progressive,neurodegenerative and rare disease with a frequency of10 per 100,000 in the Caucasian population and occurring more rarely in other races（Squitieri et al.,1994）.HD is,nevertheless,one of the most frequently and extensively studied diseases of those caused by a dynamic mutation.The HD mutation is located on the short arm of the 4th chromosome within the HTT gene.展开更多
Although the exact mechanism（s）of the degeneration of dopaminergic neurons in Parkinson’s disease（PD）is not well understood,mitochondrial dysfunction is proposed to play a central role.This proposal is strongly s...Although the exact mechanism（s）of the degeneration of dopaminergic neurons in Parkinson’s disease（PD）is not well understood,mitochondrial dysfunction is proposed to play a central role.This proposal is strongly strengthened by the findings that compromised mitochondrial functions and/or exposure to mitochondrial toxins such as rotenone,paraquat,or MPTP causes degeneration of the midbrain dopaminergic.展开更多
【目的】揭示西洞庭湖沉积物重金属的时空分布规律,阐明湖泊沉积物的重金属来源,探究绝对主成分-多元线性回归(absolute principal component score-multiple linear regression,APCS-MLR)模型在湖泊沉积物重金属来源解析中的适应性。...【目的】揭示西洞庭湖沉积物重金属的时空分布规律,阐明湖泊沉积物的重金属来源,探究绝对主成分-多元线性回归(absolute principal component score-multiple linear regression,APCS-MLR)模型在湖泊沉积物重金属来源解析中的适应性。【方法】采集沅江河口、湖泊近岸、湖泊远岸和湖泊中心的4个沉积柱共160个样本,对样本进行210Pb同位素定年和重金属含量分析,运用传统多元统计分析方法和APCS-MLR模型定量解析重金属的来源与绝对贡献率。【结果】从沅江河口到湖泊中心,As和Cd的平均含量逐步递减,Cr、Cu、Ni、Pb和Zn的平均含量呈先减少后增加的趋势。在垂直方向上,重金属含量自沉积物表层向中层呈升高趋势,并随水深的增加出现相对一致的波动。从时序上看,沉积物重金属自然源的绝对贡献率呈下降趋势,人为源的绝对贡献率总体上升且超过自然源的绝对贡献率。其中,Cd的来源受人类活动影响最大,其人为源在沅江河口和湖泊中心的绝对贡献率分别为28.77%和69.35%。【结论】近百年来,人类活动对西洞庭湖沉积物重金属来源的绝对贡献率逐年上升,人类活动已经成为影响沉积物重金属含量最重要的因素。APCS-MLR模型能够简便、有效地应用于沉积物重金属来源的研究。展开更多
基金supported by the National Key R&D Program of China(2017YFC1405005)the National Natural Science Foundation of China(71690233)
文摘The weapons system portfolio selection problem arises at the equipment demonstration stage and deals with the military application requirements.Further,the contribution rate of the system is one of the important indicators to evaluate the role of a system,which can facilitate the weapons system portfolio selection.Therefore,combining the system contribution rate with system portfolio selection is the focus of this study.It also focuses on calculating the contribution rates of multiple equipment systems with various types of capabilities.The contribution rate is measured by establishing a hierarchical multi-criteria value model from three dimensions.Based on the value model,the feasible portfolios are developed under certain cost constraints and the optimal weapons system portfolios are obtained by using the classification optimization selection strategy.Finally,an illustrative example is presented to verify the feasibility of the proposed model.
基金partially financed by PICT 2016-0586(Agencia Nacional de Promocion de la Investigacion,el Desarrollo Tecnologico y la Innovacion)INTA PD096 from(Instituto Nacional de Tecnología Agropecuaria),Argentina.
文摘Management under ecological schemes and increasing habitat heterogeneity,are essential for enhancing biodiversity in vineyards.Birds provide several contributions to agriculture,for example pest control,recreation and enhancing human mental health,and have intrinsic value.Birds are also ideal model organisms because they are easy to survey,and species respond differently to agricultural land use at different scales.Vegetated borders of crops are key for many species of birds,and distance to the border have been found to be an important factor in vineyard-dominated agroecosystems.We evaluate if there are differences in the bird assemblage,between the interior compared to borders within vineyards,using a hierarchical community occupancy model.We hypoth-esized that occupancy of birds is greater in environments with greater heterogeneity,which in this study was considered to be contributed by the proximity to vegetated corridors.We expected that vineyard borders close to corridors will have higher bird occupancy than the center of the vineyard.The research was conducted in three vineyards with biodiversity-friendly management practices,in Gualtallary,Mendoza,Argentina.Bird surveys were conducted over three breeding seasons from 2018 to 2020.Occupancy and richness of the bird community was more closely associated with the borders adjacent to the corridors than with the interior of the vineyards,as we initially predicted,although the assemblage of birds did not differ much.More than 75%of the registered species consume exclusively or partially invertebrates.Biodiversity-friendly management and ecological schemes,together with vegetated corridors provide multiple benefits for biodiversity conservation.These ap-proaches not only minimize the use of agrochemicals but also prioritize soil cover with spontaneous vegetation,which supports a diverse community of insectivorous bird species,potentially contributing to pest control.
文摘Over the past 70 years since the founding of the People’s Republic of China,great changes have been seen in the financial industry in terms of its nature,function,scale,structure and other features.It has experienced six stages of development,namely,inception and consolidation,arduous growth,exploration and restructuring,segmentation,fictitious economy orientation,and real economy promotion and risk prevention.The tremendous success and useful experience made during this period have largely bolstered the prosperity and stability of the Chinese economy,improved Chinese people’s living standards,and exerted a profound impact on China’s economy and society.Based on its development pattern,the Chinese financial sector will expect further openingup at home and abroad and a growing capacity in serving the real economy,while new business forms and models will emerge rapidly and stronger preventive measures against financial risks will be needed.In response to the financial development in the new era,proactive and pragmatic measures need to be in place to safeguard the stable and sound development of the financial industry.
文摘Over the past decade,nine separate gene therapy clinical trials for advanced Parkinson’s disease（PD）have been launched and completed,involving the dosing of nearly 12-dozen PD volunteers who incurred significant risks to hopefully reduce symptoms and gain a better life.
文摘The Third "Brother Cup" China International Young Designers Contest was held in April 1995 at the Century Theatre in the Beijing Sino-Japanese Youth Exchange Centre. The Contest, an important activity at the ’95 China International Clothing and Accessories Fair, is the largest one in the world at present with designers from many countries and regions. Recently I interviewed the sponsor of the contest—
文摘I.Introduction This year marks the 70th anniversary of the People’s Republic of China.Consequently,this is a suitable moment to reflect on the contributions made by China to international human rights.Seventy years is a very long time,and much has happened during this period.Therefore,such a review by definition needs to be selective.
文摘Human rights are the rights and freedoms of humans in their nature, and represent the basic conditions for the free and complete development of the humankind. The educational develop- ment level is an important mark of the level of realization of human rights. China＇s higher education realized the historic development in the 1998- 2007 period, and the number of the enrolled students at common colleges and universities across the nation had exploded from 3.4 million to 18.85 million, the number one in the world.
文摘China has a population that is one-fifth of humanity. Most of its people live in rural areas. This country has been built and developed on the ruins of semi-colonialism and semi-feudalism and on a foundation of ＂poverty and blankness.＂ The founding of New China created the political condition for the advancement of people＇s democracy. Since the adoption of reform and open policies, or gaige kaifang, China has gradually found an effective way, suited for Chinese conditions,
文摘Huntington’s disease（HD）is an autosomal dominant,monogenic,progressive,neurodegenerative and rare disease with a frequency of10 per 100,000 in the Caucasian population and occurring more rarely in other races（Squitieri et al.,1994）.HD is,nevertheless,one of the most frequently and extensively studied diseases of those caused by a dynamic mutation.The HD mutation is located on the short arm of the 4th chromosome within the HTT gene.
文摘Although the exact mechanism（s）of the degeneration of dopaminergic neurons in Parkinson’s disease（PD）is not well understood,mitochondrial dysfunction is proposed to play a central role.This proposal is strongly strengthened by the findings that compromised mitochondrial functions and/or exposure to mitochondrial toxins such as rotenone,paraquat,or MPTP causes degeneration of the midbrain dopaminergic.
文摘【目的】揭示西洞庭湖沉积物重金属的时空分布规律,阐明湖泊沉积物的重金属来源,探究绝对主成分-多元线性回归(absolute principal component score-multiple linear regression,APCS-MLR)模型在湖泊沉积物重金属来源解析中的适应性。【方法】采集沅江河口、湖泊近岸、湖泊远岸和湖泊中心的4个沉积柱共160个样本,对样本进行210Pb同位素定年和重金属含量分析,运用传统多元统计分析方法和APCS-MLR模型定量解析重金属的来源与绝对贡献率。【结果】从沅江河口到湖泊中心,As和Cd的平均含量逐步递减,Cr、Cu、Ni、Pb和Zn的平均含量呈先减少后增加的趋势。在垂直方向上,重金属含量自沉积物表层向中层呈升高趋势,并随水深的增加出现相对一致的波动。从时序上看,沉积物重金属自然源的绝对贡献率呈下降趋势,人为源的绝对贡献率总体上升且超过自然源的绝对贡献率。其中,Cd的来源受人类活动影响最大,其人为源在沅江河口和湖泊中心的绝对贡献率分别为28.77%和69.35%。【结论】近百年来,人类活动对西洞庭湖沉积物重金属来源的绝对贡献率逐年上升,人类活动已经成为影响沉积物重金属含量最重要的因素。APCS-MLR模型能够简便、有效地应用于沉积物重金属来源的研究。
