Analysis of cancer incidence and mortality data in Heilongjiang province cancer registries, China, 2015

Objective In recent years, the rising incidence of cancer has increased patients’ living and economic burdens. This study analyzed the incidence and death due to malignant tumors in tumor registries in Heilongjiang province (China) in 2015 to provide a scientific basis for the prevention and treatment of malignant tumors in this province. Methods Data on tumor incidence and patient deaths were collected from seven tumor registries in Heilongjiang province (China) in 2015. According to the stratification of urban and rural areas and patient sex, the crude, standard, and accumulative rates (0–74 years of age) were calculated. The 2000 China Population Census data and Segi’s standard population were used to calculate the age-standardized rates. Results In 2015, the incidence rate of malignant tumors in Heilongjiang cancer registries was 259.90/100 000. The age-standardized incidence rates in the Chinese and world standard populations were 158.89/100 000 and 155.06/100 000, respectively, with a cumulative incidence rate (0–74 years) of 17.68%. The incidence of malignant tumors in urban areas was 273.55/100 000, while that in rural areas was 220.32/100 000. The incidence of malignant tumors in men was 270.89/100 000, higher than that in women (249.04/100 000). Lung cancer had the highest incidence, followed by breast cancer, liver cancer, colorectal cancer, and thyroid cancer. The mortality rate of malignant tumors in Heilongjiang cancer registries was 164.69/100 000. The age-standardized mortality rates in Chinese and in world standard populations were 95.29/100 000 and 94.35/100 000, respectively, with a cumulative mortality rate (0–74 years) of 10.44%. The mortality rate of malignant tumors in urban areas was 169.51/100 000, while that in rural areas was 150.72/100 000. The mortality rate of malignant tumors in men was 201.64/100 000, higher than that in women (128.21/100 000). Lung cancer had the highest mortality, followed by liver cancer, stomach cancer, colorectal cancer, and breast cancer. Conclusion Lung, liver, breast, and colorectal cancers were the most common cancers in Heilongjiang province, China, and should be considered the key cancer types for prevention and treatment. Moreover, the incidence of thyroid cancer is increasing, and thus early preventative measures should be implemented.

First Report LA-ICP-MS Zircon U-Pb Age of Early Jurassic Volcanic Rocks from Rencha Volcanic Basin, Northeast Guangdong Province, Southeastern China

Objective Most scholars agreed that the tectonic setting of South China block（SBC）changed from Tethys during the Indosinian to Pacific tectonic regime in the Yanshanian.However,the specific change time for the transition is still in debate and the Triassic to Jurassic magmatic activity will provide a clue to better understanding the transition.

Spatiotemporal Differences and Classification Regulation of Urbanization Impact on Agricultural Development in Shrinking Areas:A Case Study of 15 Shrinking Cities in Three Provinces of Northeast China

Studying the impact of urbanization on agricultural development in shrinking areas is important for maintaining food security and promoted agricultural development in China.Based on the measurement results of the shrinking cities in the three provinces of Northeast China,this paper selects 15 shrinking cities as the research object,and constructs a multi-dimensional index system to explore the impact of the urbanization level of the shrinking areas on the agricultural development in the region since 2007–2019,analyzes the influencing factors and their differences by using the geographically-weighted regression model and Geodetector,and proposes a targeted regulation strategy.The results show that:1)overall,there is a negative correlation between the urbanization level and the agricultural development level in the contracted areas of the three northeastern provinces.The urbanization level in these areas has a certain negative impact on the overall level of agricultural development;2)regarding the time dimension,the impact of urbanization level on the agricultural development level in the contracted areas of the three northeastern provinces gradually increases over time;3)regarding the spatial pattern,the overall impact of shrinking urbanization levels in the three provinces of Northeast China on the agricultural development shows a significant distribution pattern of high in the east and low in the west;4)the total population and natural population growth rate at the end of the year were the main factors influencing a certain level of urbanization on agricultural development in the shrinking cities while population density and the urban fixed asset investment rate were the secondary factors;and 5)the main reasons why the level of agricultural development in different cities was affected by the level of urbanization were different.However,they can be categorized into areas of population loss and spatial construction,which can be further divided into area of population loss in the northeast,areas of negative population growth in the west,and areas of urban spatial change in the south.According to the causes of the impact,this paper adopted targeted regulation strategies and formulated relevant policies and solutions that cater to local conditions.

Using ORYZA2000 to model cold rice yield response to climate change in the Heilongjiang province, China

Rice(Oryza sativa L.) is one of the most important staple crops in China. Increasing atmospheric greenhouse gas concentrations and associated climate change may greatly affect rice production. We assessed the potential impacts of climate change on cold rice production in the Heilongjiang province, one of China's most important rice production regions. Data for a baseline period(1961–1990) and the period 2010–2050 in A2 and B2 scenarios were used as input to drive the rice model ORYZA2000 with and without accounting for the effects of increasing atmospheric CO2 concentration. The results indicate that mean,maximum, and minimum temperature during the rice growing season, in the future period considered, would increase by 1.8 °C under the A2 scenario and by 2.2 °C under the B2 scenario compared with those in the baseline. The rate of change in average maximum and minimum temperatures would increase by 0.6 °C per 10-year period under the A2 scenario and by 0.4 °C per 10-year period under the B2 scenario. Precipitation would increase slightly in the rice growing season over the next 40 years. The rice growing season would be shortened and the yield would increase in most areas in the Heilongjiang province. Without accounting for CO2 effect, the rice growing season in the period 2010–2050 would be shortened by 4.7 and 5.8 days,and rice yields would increase by 11.9% and 7.9%, under the A2 and B2 scenarios, respectively.Areas with simulated rice yield increases greater than 30.0% were in the Xiaoxing'an Mountain region. The simulation indicated a decrease in yield of less than 15% in the southwestern Songnen Plain. The rate of change in simulated rice yield was 5.0% and 2.5% per 10 years under the A2 and B2 scenarios, respectively. When CO2 effect was accounted for, rice yield increased by 44.5% and 31.3% under the A2 and B2 scenarios, respectively. The areas of increasing yield were sharply expanded. The area of decreasing yield in the western region of Songnen Plains disappeared when increasing CO2 concentration was considered. The stability of rice yield would increase from 2010 to 2050. Overall, the simulation indicates that rice production will be affected positively by climate change in the next 40 years in the Heilongjiang province, China.

The change character of monsoon rainband over Heilongjiang Province for the past 40 years

Precipitation in Heilongjiang Province of China increased slightly from 1960 to 2000. Adopting the method proposed by Arthur N. Samel, we separated monsoon rainband rain and calculated the initial and final date of monsoon rainband of each year and each station, For the period of 1960-2000, the change of annual precipitation in Heilongjiang Province, with an increasing trend of 2.229 mm per decade, is not significant; the duration and total monsoon rain decreased significantly, with a decreasing trend of -6.9 day per decade and -17,5 mm per decade separately. That change comes from early leaving date of summer monsoon rainband for the period of 1960- 1975 and later arriving date of summer monsoon rainband for the period of 1990-2000, The weakening of summer monsoon makes ils contribution to the annual precipitation decreased significantly, with a decreasing trend of 4.4 % per decade.

Coupling relationship between reservoir diagenesis and hydrocarbon accumulation in Lower Cretaceous Yingcheng Formation of Dongling,Changling fault depression,Songliao Basin,Northeast China

The Lower Cretaceous Yingcheng Formation in the southern Songliao Basin is the typical tight oil sandstone in China.In order to better predict the petrophysical properties of the tight sandstone reservoirs in the Lower Cretaceous Yingcheng Formation,Songliao Basin,Northeast China,the diagenesis and porosity evolution was investigated using a suite of petrographic and geochemical techniques including thin section analysis,scanning electron microscopy,mercury intrusion and fluid inclusion analysis,on a set of selected tight sandstone samples.Combined with the histories of burial evolution,organic matter thermal evolution and hydrocarbon charge,the matching relationship between reservoir porosity evolution and hydrocarbon accumulation history is analyzed.The result showed that the tight sandstone reservoirs characterized of being controlled by deposition,predominated by compaction,improved by dissolution and enhanced by cementation.The hydrocarbon accumulation period was investigated using a suite of hydrocarbon generation and expulsion history,microfluorescence determination and temperature measurement technology.According to the homogenization temperature of the inclusions and the history of burial evolution,Yingcheng Formation has mainly two phases hydrocarbon accumulation.The first phase of oil and gas is charged before the reservoir is tightened,the oil and gas generated by Shahezi source rocks enter the sand body of Yingcheng Formation,influenced by the carrying capability of sand conducting layer,oil and gas is mainly conducted by the better properties and higher connectivity sand body and enriched in the east,which belongs to the type of densification after hydrocarbon accumulation.The second phase of oil and gas charge after densification,which belongs to the type of densification before the hydrocarbon accumulation.

Dynamic Variation of Vegetation and Its Response to Economic Factors in the Border Area of Heilongjiang Province

[Objective] The aim was to study the dynamic variation of vegetation and its response to economic factors in the border area of Heilongjiang Province.[Method] Based on SPOT Vegetation NDVI data in each 10 days from 1998 to 2007,the dynamic variation of vegetation in the border area of Heilongjiang Province in recent 10 years was studied,and the response of vegetation variation to economic factors was analyzed in the paper.[Result] On the whole,vegetation coverage was high in the border area of Heilongjiang Province from 1998 to 2007,and showed increasing trend.Except for parts of Huma County showing degrading trend,the whole vegetation condition in the border area of Heilongjiang Province was basically constant or improved,and the region with constant vegetation accounted for 71.00%,while the region with slight improved vegetation occupied 26.81%.Meanwhile,vegetation index and GDP increased on the whole from 1998 to 2007,but there was no complete consistency in their trends.In addition,MNDVI was significantly positively correlated with the average salary of local workers (P<0.01),but significantly negatively correlated with farmland area (P<0.01),and the negative correlation was delayed,that is to say,the decrease of farmland area in the first year would affect MNDVI in the second and third year.[Conclusion] The study could provide scientific references for the establishment of policies about economic development and ecological environment in Heilongjiang River basin.

Research on Changes in Risk of Chilling Damage to Maize in Heilongjiang Province since 1980

Based on data of daily average temperature observed during maize growing period as well as data of different growing periods of maize at 24 meteorological stations in Heilongjiang Province from 1980 to 2010, changes in risk of chilling damage to maize since 1980 were analyzed. Initially, the risk of the hazard factor was calculated by adopting the criterion of ＂Comprehensive Decision System of Chilling Damage to Maize in Heilongjiang Province＂. Then, choosing the planting area of maize at 75 stations as the exposure degree index, risk zones of exposure degree were concluded. Afterwards, risk zones of maize sensitivity to chilling damage were outlined based on maize yield per unit area. At last, a comprehensive evaluation model of chilling damage to maize in Heilongjiang Province was established, and Heilongjiang Province was divided into 5 grades of risk zones according to the model. The results showed that compared with the period before 1995, the risk of chilling damage to maize was severer in the west area of Songnen Plain, and previous sub-low or medium risk of chilling damage to maize in the west of Sanjiang Plain changed into subhigh or hi qh risk since the middle 1980s.

Spatially precise reconstruction of cropland areas in Heilongjiang Province, northeast China during 1900-1910

It is necessary to reconstruct past changes in land use and land cover to under- stand the historical effects of humans on climate and the local environment. We collected information from historical documents on the cropland area at the county level for Heilongji- ang Province, northeast China during 1900-1910. The original records from different histori- cal documents were calibrated with each other. We then defined an agricultural suitability index quantified by the distance from settlements, the slope and complexity of the topography, and the distance from rivers. Following the order of the agricultural suitability index from high to low values, the documented areas of cropland at the county level were then allocated into 1 km x 1 km cells. The area of cropland in 2009 was then retrieved from Landsat ETM＋ images and compared with the areas of cropland during 1900-1910 to determine the human-induced changes in land use and land cover. In this period, the total area of cropland was about 25,397 km2 and this mainly occurred in the mid-southern part of Heilongjiang, in particular the six counties of Hailun, Bayan, Wuchang, Hulan, Shuangcheng and Wangkui. In 2009, the total area of cropland had increased to about 163,808 km2 and had spread over the south- western part to the central and northeastern parts of Heilongjiang. The area of cropland had therefore increased by about 138,411 km2 during the 20th century. The proportion of land used as cropland increased from about 5.6% during 1900-1910 to about 36.2% in 2009, indicating that about 30.6% of the natural land surface in Heilongjiang was replaced by cropland. A total of about 44% （60,962 km2） of the cropland was converted from forest, mainly on the western edge and in the northeastern part of the present-day agricultural area. These areas of cropland reconstructed from historical records for the period 1900-1910 could be used as a basic data set to study the effects of agricultural development on climate and the local environment.

Early Silurian(Telychian)rugose coral fauna of Daguan area,northeast Yunnan Province,China

Study on rugose coral fauna of the Sifengya Formation(early Telychian)and Daluzhai Formation(mid-late Telychian)in Daguan area,northeast Yunnan Province,China was carried out.Rugose coral fauna of the Sifengya Formation included 18 genera and 34 species,while Daluzhai Formation with nine genera,ten species.We described rugose coral fauna(12 genera,19 species)including one new genus and five new species,i.e.Protoketophyllum daguanense gen.et sp.nov.,Crassilasma huanggexiense sp.nov.,Pseudophaulactis heae sp.nov.,P.convolutus sp.nov.,and Shensiphyllum minor sp.nov..The characteristics and geological significance of rugose coral fauna of Sifengya Formation and Daluzhai Formation were analyzed.Particularly,rugose coral fauna of the Sifengya Formation represent early Telychian rugosan fauna in the Upper Yangtze region and improve the sequences of early Silurian(Llandovery)rugose coral assemblages in Yangtze region.It is therefore very meaningful to further analyze radiation period of rugose coral fauna in such epoch.

东北三省高等教育助力共同富裕的实证研究

共同富裕是满足人民对美好生活向往的重要方面,高等教育的振兴是事关经济与社会发展的关键因素。本研究选取黑龙江、吉林、辽宁东北三省2012—2021年36个城市共10年的数据,基于“富裕”和“共同”两个维度构建共同富裕指数,通过构建SYS-GMM模型分析东北三省高等教育对实现共同富裕的影响效应。研究表明:振兴东北三省高等教育将会显著促进共同富裕的实现,在其他变量保持不变的前提下,东北三省高等教育发展水平每提升1个单位,共同富裕指数提升1.452个单位;东北三省高等教育发展不仅能促进收入提升,还能有效缩小收入差距;东北三省产业结构在高等教育助力实现共同富裕的过程中发挥显著的正向调节效应,即产业结构优化升级将有助于东北三省高等教育推动实现共同富裕。因此,东北三省要全力加强高等教育强省建设,制定实施东北三省高等教育一体化发展与融通战略;要提高东北三省农村地区高等教育招生录取比例,促进教育成果服务地方惠及大众;要以“四个面向”为指引,推进东北三省产业结构升级,加强科研成果转化,构筑产教协同机制。

基于超效率SBM模型的东北三省城市土地利用效率时空差异及影响因素

[目的]探究东北三省城市土地利用效率时空差异及影响因素,为东北三省和其他欠发达地区的城市高质量发展和优化国土空间格局提供借鉴参考。[方法]运用超效率SBM模型、非参数核密度估计以及Tobit回归模型对2010—2020年东北三省城市土地利用效率时空差异及影响因素进行分析。[结果](1)从时间演变特征来看,东北三省城市土地利用效率均值呈显著上升趋势,但整体水平不高;从空间演变特征来看,区域差异显著,低值区城市数量大幅度减少,高值区城市增多,高值区城市分布范围从黑龙江覆盖至东北三省全域。(2)从时序动态演进特征来看,研究期间不同时段内三大省份城市土地利用效率的极化程度、效率差异和发展水平都呈现出不同的动态演进特征。(3)从影响因素分析来看,各变量对辽宁、吉林、黑龙江三省城市土地利用效率的影响程度和作用方向有所差异,人力资本、科教支出、经济发展水平、对外开放程度、产业结构、交通基础设施和城镇化率具有促进作用,环境规制具有抑制作用。[结论]实现城市高质量发展和土地集约高效利用,各城市应因地制宜、因城施策,从刺激经济增长、产业结构优化升级、优化营商环境、做好人才和资金引进工作等方面系统推进。

东北三省玉米产量和耕层土壤有机碳对粪肥施用响应的Meta分析

为了进一步合理施用粪肥以保障东北黑土质量与国家粮食安全,采用Meta分析方法定量研究粪肥施用对东北三省(辽宁省、吉林省、黑龙江省)耕层(0~20 cm)土壤有机碳(SOC)含量和玉米产量的影响,揭示不同管理措施、气候条件、土壤初始理化性质对粪肥增碳、增产效果的影响。结果表明,不同管理措施对粪肥增碳、增产的影响存在显著差异。与不施肥相比,化肥施加量不变且额外添加粪肥时能够显著提升耕层SOC含量30.4%~42.7%和玉米产量41.9%~50.5%;粪肥施用10~20年显著提升耕层SOC含量43.7%,≥20年显著提升玉米产量90.6%。与单施化肥相比,牛粪与化肥配施、粪肥替代50%~80%化肥(总施用养分不变)分别显著提高耕层SOC含量61.2%和57.7%。粪肥与化肥总养分施用量直接影响玉米产量,与不施肥相比,在总施钾量(K_(2)O)≤300 kg/hm^(2)、总施磷量(P_(2)O_(5))≤200 kg/hm^(2)、总施氮量(N)为100~300或≥400 kg/hm^(2)时显著提升玉米产量。气候条件的变化也影响着粪肥的改良效果,年均气温2~5℃、年均降水量400~500 mm时,提升SOC效果更佳;年均气温5~8℃、年均降水量500~600 mm时提升玉米产量效果更佳。此外,土壤初始养分偏低更有利于SOC增加,初始SOC≤15 g/kg、总氮≤0.5 g/kg、碱解氮≤100 mg/kg、有效磷≤20 mg/kg、速效钾100~200 mg/kg时,粪肥施用下SOC可显著增加25.9%~84.4%。综上,施用粪肥对改善东北三省内农田SOC含量与玉米产量具有重要意义,高效的粪肥施用措施需考虑气象条件和土壤性质,长期在土壤初始性质较差的耕地配施粪肥与化肥是增碳、增产的重要举措。

气候变化对中国东北三省主要粮食作物影响研究综述

全球气候变化已经成为事实,并且导致全球粮食危机和饥饿风险增加。东北三省作为我国主要的粮食生产基地,对气候变化十分敏感。本文梳理了当前及未来气候变化对东北三省玉米、水稻和大豆生产影响的相关研究,概括了当前主要研究方法、东北三省主要作物对气候变化的响应以及应对措施,并进一步评述了当前主要研究方法和研究领域的不足:1)研究气候变化和极端气候事件对作物生长发育和产量影响的主要方法包括田间试验法、统计分析法以及作物模型法,其中田间试验法结果最直观,统计分析法可操作强、应用范围最广,作物模型法机理性强。2)东北三省气候变化明显,并且随着气候变化,干旱逐渐取代低温冷害成为当地主要灾害。3)气候变化对东北三省作物生产整体是有利的。气候变暖改善了东北三省热量资源,不仅使作物种植区域逐渐北移,作物品种也逐渐从早中熟向中晚熟转变。4)随着气候变暖不断加剧,未来东北地区作物应选择耐高温、抗旱和抗寒等抗逆性强的品种;加强农田水利设施建设,增强应对干旱洪涝灾害的能力;采用新的农业管理措施,保护土壤健康以及粮食生产安全。5)未来需要加强对CO_(2)补偿效应以及病虫害等的研究,加强对作物模型的完善,以更好地应对气候变化对粮食安全的不利影响。

Discovery of a Late Permian Angara-Cathaysia mixed flora from Acheng of Heilongjiang,China,with discussions on the closure of the Paleoasian Ocean

This work documents a new flora from the Upper Permian Hongshan Formation of Acheng County, Heilongjiang Province, Northwest China. The flora consists of 20 species: Paracalamites sp., Pecopteris tangwangheensis Huang, Callipteris obese Huang, Callipteris shenshuensis Huang, C. tangwangheensis Huang, C. heilongjiangensis Huang, C. zeilleri Zalessky, C. sp., Comia yichunensis Huang, C. tenueaxis Huang, Iniopteris sibirica Zalessky, Supaia teiliensis Huang, Compsopteris tchirkovae Zalessky, C. cf. adzvensis Zalessky, Nilssonia sp. 1, Nil. sp. 2, Taeniopteris cf. densissima Halle, T. cf. nystraemii Halle, T. sp. and Noeggerathiopsis derzavinii Neub. It is dominated by Angara species but mixed with some typical Cathaysian elements. The age of the flora is assigned to late of the Late Permian according to the stratigraphic ranges of the known species and the comparisons of it with the similar floras. The new discovery indicates that the final collision between the North China Plate and Siberian Plate occurred in Late Permian along the Xar Moron River-Changchun-Yanji sutured zone, and the Paleoasian Ocean was finally closed at the end of the Permian.

典型收缩城市土地利用多功能时空演变及耦合协调分析——以东北三省为例

以城市收缩最具代表性和典型性的东北三省为例,利用人口统计数据识别出2009—2019年的收缩城市,并运用综合指标评价法和耦合协调度模型探究收缩城市的土地利用多功能水平及其耦合协调度演变特征。结果表明:(1)2009—2019年,东北三省收缩城市土地利用总功能及其子功能整体发展水平较低,总功能和经济功能表现为先增后减的倒“U”型的变化规律,社会功能呈现增长态势,生态功能呈波动下降趋势。(2)收缩城市土地利用多功能存在收缩类型和收缩区域的差异性,具有明显的土地利用多功能收缩效应。(3)收缩城市土地利用多功能的耦合协调度总体呈上升态势,具有相对明显的阶段特征,但整体处于轻度失调,且存在显著的空间差异。

黑龙江省参与中蒙俄经济走廊建设的现状、问题与策略

黑龙江省作为中俄边境大省,地处东北亚重要节点位置。近年来,黑龙江认真贯彻落实国家有关开放政策,积极参与中蒙俄经济走廊建设,取得了重要进展。主要表现在:合作规模扩大、合作渠道拓展、口岸开放与便利化水平提高、旅游合作项目推进、交流平台建设增多、互联互通基础设施建设加快、人文交流往来密切。当前,黑龙江参与中蒙俄经济走廊建设也面临着诸多问题,外部政治局面不稳定、互联互通进展缓慢、贸易结构单一、标准不一致、开放合作平台协调联动性不足等。新形势下,推动黑龙江加快融入中蒙俄经济走廊建设需要合理应对外部环境变化,加强基础设施建设合作,大力发展跨境产业合作,促进对外开放平台联动发展,加强双方规则标准对接。

Spatial impacts of climate factors on regional agricultural and forestry biomass resources in north-eastern province of China

The dynamics of agricultural and forestry biomass are highly sensitive to climate change, particularly in high latitude regions. Heilongjiang Province was selected as research area in North-east China. We explored the trend of regional climate warming and distribution feature of biomass resources, and then analyzed on the spatial relationship between climate factors and biomass resources. Net primary productivity （NPP） is one of the key indicators of vegetation productivity, and was simulated as base data to calculate the distribution of agricultural and forestry biomass. The results show that temperatures rose by up to 0.37℃/10a from 1961 to 2013. Spatially, the variation of agricultural biomass per unit area changed from -1.93 to 5.85 t.km^-2.a^-1 during 2000,2013. More than 85% of farmland areas showed a positive relationship be.tween agricultural biomass and precipitation. The results suggest that precipitation exerts an overwhelming climate influence on agricultural biomass. The mean density of forestry biomass varied from 10 to 30 t·km^-2. Temperature had a significant negative effect on forestry biomass in Lesser Khingan and northern Changbai Mountain, because increased temperature leads to decreased Rubisco activity and increased respiration in these areas. Precipitation had a significant positive relationship with forestry biomass in south-western Changbai Mountain, because this area had a wanner climate and stress from insufficient precipitation may induce xylem cavitation. Understanding the effects of climate factors on regional biomass resources is of great significance in improving environmental management and promoting sustainable development of further biomass resource use.

全国—本地尺度下东北三省城市创新网络演化特征与创新能力研究

在网络科学不断发展,创新过程存在跨区域、多尺度、动态性特点的背景下,创新网络及其演化已成为创新经济地理学关注的重点领域。本文将2004-2018年城市间合作专利信息作为原始数据,来表征东北三省城市创新网络,借助Gephi、Ucinet等分析工具,运用复杂网络等研究方法,基于全国—本地尺度分析其格局和结构的演化特征,测度城市创新网络资本,评价城市创新能力,进而对二者关系进行探讨。结果表明:全国—本地尺度下的东北三省城市创新网络的演化特征存在一定的相似性,以“哈长沈大”为网络核心的格局逐渐清晰,网络成长性明显但创新合作的紧密程度和效率均不可观。全国—本地尺度下东北三省城市创新网络演化特征同样存在差异性,全国尺度的网络增速小于本地尺度且存在“小世界”特性,创新资源的跨区域流动不畅通。东北三省城市创新网络资本与城市创新能力水平相关性增强,城市创新能力格局与城市网络地位分布较为一致,城市位于网络的地位以及获取异质性知识与技术的能力更为重要。

“以评促建”视角下乡村建设比较与成效研究——基于东北三省12县的分析

党的十九届五中全会首次提出“乡村建设行动”,将乡村建设作为“十四五”时期全面推进乡村振兴的重点任务。开展“县—镇—村”为一体化评价单元、以问题为导向的乡村建设评价行动,是确保乡村建设在科学指导下有序推进的关键支撑。本文确立“以评促建”的评价思路,以导向性、动态性、适宜性与可操作性为原则凝练评价指标,构建乡村建设评价体系,通过熵权TOPSIS法细化2022与2023年东北三省12县乡村建设评价成果,以评价年份为基准,全国平均水平为参考,对比分析当前东北乡村在农房建设水平、公共服务资源与人居环境风貌等方面取得的成效,研判农房功能品质欠佳、配套基础设施建设薄弱与村庄治理水平低效等问题。由此探讨面向新时期更高质量开展乡村建设的工作目标,从提升农房品质与建设管理,完善基础设施与配套服务,优化村庄治理与村民共建三方面提出相应策略,以期有力有效推动乡村全面振兴。