A bibliometric analysis using machine learning to track paradigm shifts and analytical advances in forest ecology and forestry journal publications from 2010 to 2022

Forest habitats are critical for biodiversity,ecosystem services,human livelihoods,and well-being.Capacity to conduct theoretical and applied forest ecology research addressing direct(e.g.,deforestation)and indirect(e.g.,climate change)anthropogenic pressures has benefited considerably from new field-and statistical-techniques.We used machine learning and bibliometric structural topic modelling to identify 20 latent topics comprising four principal fields from a corpus of 16,952 forest ecology/forestry articles published in eight ecology and five forestry journals between 2010 and 2022.Articles published per year increased from 820 in 2010 to 2,354 in 2021,shifting toward more applied topics.Publications from China and some countries in North America and Europe dominated,with relatively fewer articles from some countries in West and Central Africa and West Asia,despite globally important forest resources.Most study sites were in some countries in North America,Central Asia,and South America,and Australia.Articles utilizing R statistical software predominated,increasing from 29.5%in 2010 to 71.4%in 2022.The most frequently used packages included lme4,vegan,nlme,MuMIn,ggplot2,car,MASS,mgcv,multcomp and raster.R was more often used in forest ecology than applied forestry articles.R software offers advantages in script and workflow-sharing compared to other statistical packages.Our findings demonstrate that the disciplines of forest ecology/forestry are expanding both in number and scope,aided by more sophisticated statistical tools,to tackle the challenges of redressing forest habitat loss and the socio-economic impacts of deforestation.

Livelihood Vulnerability and Adaptation for Households Engaged in Forestry in Ecological Restoration Areas of the Chinese Loess Plateau

Chinese Loess Plateau has achieved a win-win situation concerning ecological restoration and socio-economic development.However,synergistic development may not be realized at the local scale.In areas undergoing ecological restoration,livelihood vulner-ability may be more pronounced due to the inflexibility,policy protection,and susceptibility to climate and market changes in forestry production.Although this issue has attracted academic interest,empirical studies are relatively scarce.This study,centered on Jiaxian County,Shaanxi Province of China explored the households’livelihood vulnerability and coping strategies and group heterogeneity con-cerned with livelihood structures or forestry resources through field investigation,comprehensive index assessment,and nonparametric tests.Findings showed that:1)the percentage of households with high livelihood vulnerability indicator(LVI)(>0.491)reached 46.34%.2)Eight groups in livelihood structures formed by forestry,traditional agriculture,and non-farm activities were significantly different in LVI,land resources(LR),social networks(SN),livelihood strategies(LS),housing characteristics(HC),and socio-demo-graphic profile(SDP).3)The livelihood vulnerability of the groups with highly engaged/reliance on jujube(Ziziphus jujuba)forest demonstrated more prominent livelihood vulnerability due to the increased precipitation and cold market,where the low-engaged with reliance type were significantly more vulnerable in LVI,SDP,LR,and HC.4)The threshold of behavioral triggers widely varied,and farmers dependent on forestry livelihoods showed negative coping behavior.Specifically,the cutting behavior was strongly associated with lagged years and government subsidies,guidance,and high returns of crops.Finally,the findings can provide guidance on the dir-ection of livelihood vulnerability mitigation and adaptive government management in ecologically restored areas.The issue of farmers’livelihood sustainability in the context of ecological conservation calls for immediate attention,and eco-compensations or other forms of assistance in ecologically functional areas are expected to be enhanced and diversified.

Advancing climate resilience through a geo-design framework: strengthening urban and community forestry for sustainable environmental design

Urban and community forestry is a specialized discipline focused on the meticulous management of trees and forests within urban,suburban,and town environments.This field often entails extensive civic involvement and collaborative partnerships with institutions.Its overarching objectives span a spectrum from preserving water quality,habitat,and biodiversity to mitigating the Urban Heat Island(UHI)effect.The UHI phenomenon,characterized by notably higher temperatures in urban areas compared to rural counterparts due to heat absorption by urban infrastructure and limited urban forest coverage,serves as a focal point in this study.The study focuses on developing a methodological framework that integrates Geographically Weighted Regression(GWR),Random Forest(RF),and Suitability Analysis to assess the Urban Heat Island(UHI)effect across different urban zones,aiming to identify areas with varying levels of UHI impact.The framework is designed to assist urban planners and designers in understanding the spatial distribution of UHI and identifying areas where urban forestry initiatives can be strategically implemented to mitigate its effect.Conducted in various London areas,the research provides a comprehensive analysis of the intricate relationship between urban and community forestry and UHI.By mapping the spatial variability of UHI,the framework offers a novel approach to enhancing urban environmental design and advancing urban forestry studies.The study’s findings are expected to provide valuable insights for urban planners and policymakers,aiding in creating healthier and more livable urban environments through informed decision-making in urban forestry management.

Coupling and Long-term Change Characteristics of Forest Carbon Sink and Forestry Economic Development in China

[Objectives]To analyze the changes in of forest carbon sink and forestry economic development,provide reference for relevant management decisions,ecological governance and resource and environment management,and promote the development of green low-carbon economy in China.[Methods]Based on the data of six forest resource inventories from 1989 to 2018 and related studies,the comprehensive evaluation model of forest carbon sink and forestry economic development,the coupling degree model of forest carbon sink and forestry economic development,and the coupling coordination degree model of forest carbon sink and forestry economic development were adopted.The coupling degree of forest carbon sink and forestry economic development from 1992 to 2018 was analyzed.Stepwise regression and ARIMA model were used to analyze the influencing factors and lagging characteristics of forest carbon sink.The coupling degree between forest carbon sink and forestry economic development in China from 2019 to 2030 was predicted by autoregression and ADF test.The coupling between forest carbon sink and forestry economic development in China and its long-term change characteristics were also discussed in this study.[Results](i)The investment of ecological construction and protection,the actual investment of forestry key ecological projects,GDP and the import of forest products had a significant impact on forest resources carbon stock.The total output value of forestry industry,the actually completed investment of forestry key ecological projects and the export volume of forest products had a significant impact on the forest carbon sink,and the actually completed investment of forestry key ecological projects has the greatest impact on the two.(ii)The impact of actually completed investment of forestry key ecological projects had a lag of 2 years on the forest resources carbon stock and a lag of 1 year on the forest carbon sink.When investing in forest carbon sink,it is necessary to make a good plan in advance,and do a good job in forest resources management and time optimization.(iii)From 1992 to 2018,the coupling degree of forest resources carbon stock,forest carbon sink and long-term development of forestry economy in China was gradually increasing.Although there were some fluctuations in the middle time,the coupling degree of forest resources carbon stock and the long-term development of forestry economy increased by 9.24%annually,and the degree of coupling coordination increased from"serious imbalance"in 1992 to"high-quality coordination"in 2018.From 1993 to 2018,the coupling degree of forest carbon sink and long-term development of forestry economy increased by 9.63%annually,slightly faster than the coupling coordination degree of forest resources carbon stock and long-term development of forestry economy.The coordination level also rose from level 2 in 1993 to level 10 in 2018.(iv)The prediction shows that the coupling coordination degree of forest resources carbon stock,forest carbon sink and the long-term development of forestry economy would increase from 2019 to 2030.The coupling coordination degree(D)values of both were close to 1,the coordination level was also 10 for a long time,and the degree of coupling coordination was also maintained at the"high-quality coordination"level for a long time.[Conclusions]Forest has multiple benefits of society,economy and ecology,and forest carbon sink is only a benefit output.The long-term coupling analysis of forest carbon sink and forestry economic development is a key point to multiple benefit analysis.The analysis shows that the spillover effect and co-evolution effect of forest carbon sink in China are significant.From 1992 to 2018,the coupling coordination degree of forest carbon sink and forestry economic development was gradually rising.The prediction analysis also indicate that the coupling coordination degree between the forest carbon sink and the long-term development of forestry economy will remain at the level of"high-quality coordination"for a long time from 2019 to 2030.Therefore,improving the level of forest management and maintaining the current trend of increasing forest resources are the key to achieving the goal of carbon peaking and carbon neutrality in China.

基于C#．NET的GSMMODEM短信猫应用设计开发

短信猫(GSM MODEM)是无线数据通信应用的重要组成部分。这里主要研究短信猫应用软件开发,介绍GSMMODEM短信猫的开发架构和应用软件开发流程,重点是运用C#语言在Visual Studio 2005编译器平台下实现GSM MO-DEM的应用开发。然后在GSM MODEM短信猫上进行调试,通过多次调试验证,与VB,VC,Java等语言开发的应用软件相比,软件用户界面友好,运行稳定,可靠性高。

基于MODEM和单片机的远程通讯系统设计与实现

本文着重介绍基于８９Ｃ５１单片机和调制解调器件ＳＴ７５３６的通讯接口电路设计、软件实现方法、远程数据采集及多机通讯接口。

Win32环境下Modem数据传输实现方法及通信协议研究

对Win98/NT环境下的串口通信和Modem的编程方法进行研究 ,通过串行端口发送数据控制Mo dem的命令状态和在线状态 ,实现数据的模拟信道传输。同时对传输过程中的通信协议进行探索和改进 。

Forestry ecological footprint in China during 1973–2003

The ecological footprint （EF） model has received much attention as an assessment indicator for sustainable development in recent years. Firstly, the temporal changes of domestic timber production, imports and exports in China were analyzed from 1973 to 2003, the analysis results showed an apparent fluctuation in timber production during 1973-1995 but a decreasing trend during 1995-2002, an increasing trend in timber imports since 1995 especially after the implementation of the Natural Forest Protection Project （NFPP）, an decreasing trend year by year in timber exports since 1995. Secondly, this paper presented a time series analysis of actual forest area demand in the sustainable yield and production approach in China from 1973 to 2003, which includes both import and export forest area demand. The results showed the actual forest area demand simulated from the sustainable yield approach was slightly higher than that from the production approach during 1978-1988 and a little lower during 1989-2003; however, the actual forest area demands simulated by these two model approaches were larger than calculations that expressed in conventional forest EF. Meanwhile, the results indicated the forestry development in China during 1978-1988 was unsustainable due to overexploitation of forest stocking volumes, and China＇s forestry moved toward sustainable development since 1989 because forest resources are exploited at lower rates than they are regenerated. However, compared to forestry developed countries, the forestry development capacity in China is still lower. Finally, based on the model results we analyzed the relationships between forestry EF and the key policies, including trade policy, economic policy and forest conservation programs. In addition, several suggestions about reducing forestry EF and enhancing sustainable forestry development in China are given.

一种基于VC的Modem分布式远程监控系统设计

针对边远地区光伏电站不易值守的问题,本文设计了一种利用VC开发Modem通信来实施远程监控的系统。系统按分布式结构设计,可实现对多个电站的实时监控。实践证明,该系统经济稳定、操作方便。

Prevention and Utilization of Invasive Plants of Agriculture and Forestry in Guangdong Province

Guangdong has become a major＂window＂ for invasive plants, and the largest zone, where cross-border and intercontinental migration frequencies reach the peak. The invasive plants in Guangdong are dominated by Mikania micrantha, Eichhornia crassipes, Alternanthera philoxeroides, Eupatorium odoratum, and Wedelia trilobata. It is an important way for treating the invasive plants by exploring the prevention methods and making ful use of the characteristics of the invasive plants, and it is of great significance to prevent and utilize alien species in a scientific and effective way in order to control the invasive plants with minimal cost.

利用MODEM芯片实现单片机远程通讯

介绍了利用MODEM芯片实现单片机远程通讯。着重分析73K222AL芯片的结构特征,设计出MODEM芯片与AT89C51的接口电路,并给出BELL 103协议下通讯呼叫连接过程的部分程序。

一种室内电力线载波MODEM的实现

本文对利用室内电力线路进行数据通信的有关问题进行了探讨，简述了采用电力线路作为通信信道的概况和存在的问题。对于实验室环境下的电力线路信道的特性进行了初步分析，提供了一种实现室内电力载波ＭＯＤＥＭ的方法。

基于高速Modem的电力线载波数字接入技术

介绍了在开发数字式电力线载波通信系统过程中涉及的一项关键技术——电力线载波数字接入技术。数字式电力线载波通信系统采用话音压缩、数字编码、数字复接等技术 ,完成话音与远动数据的汇合 ,以 TCM(格栅编码调制 )方式在电力线上传输高频信号 ,在接收端采用 TCM解调、Viterbi译码、自适应均衡等技术再生恢复出原始信息。其中高速 Modem采用 AD公司 Modem专用开发芯片 ADSP— 2 1 mod870 ,以一整套软、硬件解决方案高效实现了专用

专线MODEM在远程通信系统中的应用

目前远程视频监控系统已经成为计算机监控系统的重要分支。国内外现有的远程监控系统大多基于光纤,而光纤如果遇到机械冲击、碰撞等都会造成光缆断缆或断芯,光缆断裂后,很难快速修复,且修复设备复杂,普通用户根本无法进行焊接修复,再加上光端机价格较高,这些都限制了光纤远程监控系统的应用和普及。为此,人们找到了价格相对便宜、维护十分简单的极低比特率双绞线解决方案。文中以基于MODEM专线方式的远程视频监控系统为例,介绍经济、实用且具有广播能力的远程网络摄像机系统。

基于Modem和单片机的远程数据监测系统的设计

介绍了如何用 AT89C5 2单片机控制调制解调器件 MSM75 12 ,通过电话线传输数据 ,并给出了硬件原理图及部分程序清单。

基于电力Modem的远程电表联网自动抄表监控系统的研究

本文介绍基于ST电力线Modem器件ST7536和单片机89C51的电表联网管理系统设计以及多机通讯技术，其特点是可以不占用其它通讯电缆，安装使用方便，经济实用。

Current situation of Chinese forestry tactics and strategy of sustainable development

Based on the analysis of the current situation of Chinese forestry and a series of ecological, environmental, eco-nomic, and social problems, this paper emphasized on the importance of forests in social and economic development in China The author pointed out that sustainable development, particularly the sustainable development of forestry, is the inevitable choice to solve the problems of ecological environment and social economics. The objectives, criteria, and strategies of sus-taining forestry were also demonstrated and expounded, from the viewpoints of ecology, economics, and sociology.

利用无线MODEM实现HIS数据库的异常监测和远程处理

本文介绍利用无线工业MODEM实现对医院信息系统(HIS)数据库的作业运行、数据阻塞及死锁等情况进行监测和报警,并通过手机短信控制杀掉已死锁或阻塞的数据库线程,从而实现远程恢复各系统的正常运行。

基于Modem的通信电源远程监控系统

给出了基于Modem的通信电源远程监控系统的设计方案和实现要点,该系统分为二级结构,由监控前台(监控站)及后台(监控中心)组成,监控前台以8031单片机为核心组成数据采集系统,C51语言编程,监控中心软件使用VisualC++语言设计。通过实际使用,该系统工作可靠,操作方便,能够实现对多个通信电源现场的远程实时监控。

用ARM控制CDMA无线Modem发送短消息

文中介绍了一种新的机器人通讯方式,即用ARM控制CDMA无线Modem发送短消息。文章对ARM中特殊寄存器的设置进行了示例介绍,同时详细介绍了CDMA无线Modem如何使用AT指令发送短消息。