摘要：
Based on the problems of poor productivity and natural regeneration of Cyclobalanopsis glauca secondary forest in hilly areas in southeast Hunan Province,experiments of thinning were carried out to analyze the effects on stand growth and regeneration of different thinning intensities and to provide guidance for managing secondary forests.Cyclobalanopsis glauca secondary forest was selected for research object,then experimental design was arranged with a randomized block by thinning intensity such as control（un-thinning）,light thinning（10%）,moderate thinning（20%） and heavy thinning（30%）.Tree measuring factor and number of naturally regenerated seedlings were investigated for researching the responses to thinning treatment.Results showed that there were significant differences of mean DBH and current annual increment of DBH in terms of the four thinning treatments,and the larger the thinning intensity,the higher the DHB increment.The maximum mean height（10.1 m） happened in stand of heavy thinning.However,significant differences existed in the current annual increment of height among the four thinning treatments.Stand volume was 93.27,91.49,and 91.90 m3 hm-2 respectively in stand of heavy thinning,moderate thinning,light thinning,and were all lower than that of the control,but current annual increment of volume was 5.65,4.43 and 3.75 m3 hm-2 yr-1,respectively and higher than that of the control.The Simpson index of shrub layer and herb layer of heavy thinning stand was 0.45 and 0.80,Shannon-Wiener index was 1.03 and 2.03,respectively.There were significant differences of naturally regenerated seedlings according to four thinning treatments only for seedlings of 5～30 cm level,but there were no significant differences for seedlings of 30～50 and 50～150 cm level.The growing space and nutritional condition of retained trees after thinning were effectively improved,stand DBH and height increased with the increasing thinning intensity.However,stand volume was not significantly different among four thinning treatments.Besides,thinning at appropriate intensities could increase the biodiversity in shrub layer and herb layer,quantities of naturally regenerated seedlings also increased with the increasing thinning intensity.Heavy thinning（30%） was the best one among four thinning treatments for silvicultural interventions on Cyclobalanopsis glauca secondary forest.
期刊：
E3S Web of Conferences,2019年131:01108- ISSN：2267-1242
通讯作者：
Chen, J.-H.
作者机构：
[Xia C.-H.; Chen J.-H.] College of Forestry, Central South University of Forestry and Technology, Changsha, Hunan, 410004, China;[Chen Y.-W.] Department of Landscape Architecture, Guangdong Ocean University, Zhanjiang, Guangdong, 524088, China
通讯机构：
[Chen, J.-H.] C;College of Forestry, China
会议名称：
2nd International Conference on Biofilms, ChinaBiofilms 2019
会议时间：
10 October 2019 through 13 October 2019
摘要：
<i>Anthurium andraeanum<i/> Lind. is an important tropical flower. However, the spathe of <i>A. andraeanum<i/> develops a ”greenback” under low-light conditions. This study aimed to evaluate the use of oyster shell supplementation as a cultivation technique for inhibiting the spathe “greenback” of <i>A. andraeanum<i/> under low-light conditions. Appropriate calcium from micro-dissolution of oyster shell can improve the activity of phenylalanine ammonia lyase (PAL) which is positively correlated with the anthocyanin content. Using regression models and response surface methodology (RSM), the relationships between oyster shell fragments and the anthocyanin content were determined. The results showed that the solubility of oyster shells increased with the increase in fragment weight, C, and time, T at pH 5.9. In oyster shell substrate, cultivation of <i>A. andraeanum<i/> under low-light conditions (less than 220 μmol·m<sup>−2<sup/>·s<sup>−1<sup/>) at pH 5.9, regression analysis showed that the PAL activity in pedicels of <i>A. andraeanum<i/> first increased and then decreased with the increase in oyster shell fragment weight C, and the 286 mg oyster shell fragments greatly increased the PAL activity of <i>A. andraeanum<i/> pedicels within 8 weeks (w). The 286 mg oyster shell fragments significantly increased the anthocyanin content in <i>A. andraeanum<i/> spathes under weak-light conditions within 8 h, and the soluble sugar content reached the maximum value at 15 weeks as well, together with the pedicel diameter, soluble sugar and water content, thus inhibiting the spathe “greenback” of <i>A. andraeanum<i/>.
摘要：
In this study, the main goal of co-fermentation of fungal polysaccharides with Cordyceps militaris（C.m） and Sanghuangporus lonicericola（S.i） is as follows, the co-fermentation method, co-fermentation medium and fermentation conditions were studied, and the polysaccharide extraction from the mycelium obtained by co-fermentation was tested. On this basis, the main active ingredient content and the antioxidant activity difference of polysaccharide of the single bacteria and co-fermented mycelium were compared. The main findings are as follows:1. A co-fermentation model for producing polysaccharides was established by C.m and S.i. The key medium components were determined by single factor experiment, which were divided into soluble starch（A）, beef extract powder, K2 HPO4 and MgSO4·7 H2 O. The optimal medium composition was predicted to be: soluble starch32.20 g/L, beef extract powder 12.07 g/L, K2 HPO4 1.11 g/L, MgSO4·7 H2 O 0.36 g/L.2. Based on the optimization of medium, the key factors affecting the fermentation conditions were inoculum volume, culture temperature, initial pH. The best fermentation conditions for co-fermentation of fungal polysaccharides were: inoculum volume 19.86%, culture temperature 30.05 ℃, initial pH=7.06.3. The best extraction process was as follows: the ratio of material to water was 1:50（g/mL）; the ultrasonic power was 320 W; the ultrasonic time was 50 min. The CaCl2 method was used for deproteinization. When the calcium chloride content was 5%, the polysaccharide yield was 93.66%, the deproteinization rate was 90.7%. The macro chromic resin HD-3 was used for decolorization.4. The content of polysaccharides, triterpenoids and flavonoids in the mycelium obtained by co-fermentation was significantly higher than that of single fungal. The three free radical scavenging rates of co-fermented mycelium polysaccharides were about 65%, which was significantly higher than that of single-species polysaccharides. The elution of three mycelium polysaccharides by DEAE-cellulose column chromate-graphy was compared, it proved that the polysaccharide obtained by co-fermentation fungal differs from the component of the polysaccharide obtained by fermentation of a single fungal.
作者机构：
[Sun Yurong; Xie Chuang; Li Pin] Cent South Univ Forestry & Technol, Dept Sci, Changsha 410000, Hunan, Peoples R China.
会议名称：
International Conference on Intelligent Transportation, Big Data & Smart City (ICITBS)
会议时间：
JAN 12-13, 2019
会议地点：
Changsha, PEOPLES R CHINA
会议主办单位：
[Xie Chuang;Li Pin;Sun Yurong] Cent South Univ Forestry & Technol, Dept Sci, Changsha 410000, Hunan, Peoples R China.
关键词：
pedestrian detection;CNN;deep learning;YOLO
摘要：
This paper studies the insufficient extracted image feature in CNN basic network towards large model parameters quantity in convolutional neural network-based target detection model. First, it analyzes calculating method and parameter quantity of separable convolution and standard convolution, and processes original image through increasing sampling layer and blocking area extraction layer on Kronecker. Then, original image will be sampled with two different ratios to form image pyramid sequence and splice two-layered pyramid image in order to guarantee the same original image size. Furthermore, a better learning ability in network can be enhanced under condition without increasing networked scale through multi-scaled training methods. The experiment shows target detection algorithm in this paper cannot only be superior to traditional algorithm but it can also be superior to YOLO model and SSD model in comprehensive performance.
摘要：
The contradiction among population, resource and environment has become increasingly evident that requires the manufacturing industry to improve the compatibility of its activities and the environment. Green supply chain management is a valid way to resolve the conflict between manufacturing industry and the environment based on a systems point of view and the concept of integration. In the content of this paper, the concept of green supply chain would be combined with the method of DEA and it is established from the perspective of input and output in order to offer academic reference and practical guidance to automobile manufacturing industry for moving toward green development that is a set of complete carbon performance evaluation system of automobile manufacturing industry in green supply chain.
通讯机构：
[Cao, Jiwu] C;Cent South Univ Forestry & Technol, Changsha 410004, Hunan, Peoples R China.
会议名称：
International Conference on Frontiers of Biological Sciences and Engineering (FBSE)
会议时间：
NOV 23-24, 2018
会议地点：
Chongqing, PEOPLES R CHINA
会议主办单位：
[Wu, Yi;Cao, Jiwu;Xu, Yongfu;Peng, Jiqing;Liu, Chunlin;Zhou, Guoying] Cent South Univ Forestry & Technol, Changsha 410004, Hunan, Peoples R China.
会议论文集名称：
AIP Conference Proceedings
关键词：
'Yuxia';Interspecific Hybrid;Michelia Maccluri;Michelia Yunnanensis;South China
摘要：
Breeding new varieties of Michelia with Michelia maccluri as male parent and Michelia yunnanensis as female parent. The results showed that: ‘Yuxia’ has the characteristics of excellent ornamental characters, stable ornamental characters and wide adaptability. It is suitable for cultivation in southern China, especially in most areas of the Yangtze River, and has a good application prospect.
