1,131 research outputs found
Hierarchical Model Predictive Control of independent systems with joint constraints
No full textThis paper describes a hierarchical scheme for the control of independent stable systems subject to joint constraints. At the higher layer of the control structure reduced order dynamic models are used to minimize an economic cost function by adopting a long sampling time, while at the lower layer independent shrinking horizon MPC controllers working at a faster rate are designed for the original models to guarantee stability and convergence. A novel model reduction procedure is developed and simulation results are reported to witness the potentialities of the approach
Paratachycines (Paratachycines) hebeiensis : Zhang, Liu & Bi 2009
No full textParatachycines (Paratachycines) hebeiensis Zhang, Liu & Bi, 2009 (Figs. 12–17) Paratachycines (Paratachycines) hebeiensis: Zhang, Liu & Bi, 2009. Zootaxa, 1984: 66–67. Type specimen: male; type locality: Wulingshan, Xinglong county, Hebei; location of type specimen: Shanghai Entomological Museum, Chinese Academy of Science (SEM, CAS). Material examined. 1♂ 6♀♀, China, Hebei province, Xinglong county, Wulingshan, alt. 600m, 8–9-IX-2007, leg. Xianwei LIU et al..Published as part of Qin, Yanyan, Liu, Xianwei & Li, Kai, 2019, Review of genus Paratachycines Storozhenko, 1990 (Orthoptera: Rhaphidophoridae: Aemodogryllinae) with a new recorded species from China, pp. 394-400 in Zootaxa 4700 (3) on pages 397-398, DOI: 10.11646/zootaxa.4700.3.8, http://zenodo.org/record/354920
The genome landscape of the Xinglong buffalo
No full textAbstract Background Xinglong buffalo, as an indigenous breed in Hainan province of China, possesses characteristics such as high humidity tolerance, disease resistance and high reproductive capacity. Combined with whole genome sequencing technology, comprehensive investigation can be undertaken to elucidate the genomic characteristics, functions and genetic variation of Xinglong buffalo population. Results Xinglong buffalo has the highest genetic diversity, lowest runs of homozygosity average length, and fasted decay of linkage disequilibrium in our study population. Phylogenetic tree results revealed that Xinglong buffalo was gathered together with Fuzhong buffalo firstly. The population genetic structure analysis indicates that at K = 3, the Xinglong buffalo for the first time showed a distinct ancestral origin from other water buffalo. Furthermore, compared to different populations, candidate genes displaying significantly distinct patterns of single nucleotide polymorphisms (SNPs) (e.g., RYR2, COX15, PCDH9, DTWD2, FCRL5) distribution have been identified in the Xinglong buffalo. Conclusions Based on the whole genome sequencing data, this study identified a substantial number of SNPs and assessed the genetic diversity and selection signatures within the Xinglong buffalo population. These results contribute to understanding the genomic characteristics of Xinglong buffalo and their genetic evolutionary status. However, the practical significance of these signatures for genetic enhancement still requires confirmation through additional samples and further experimental validation
Acroclita liui Zhang & Li 2017
No full textAcroclita liui Zhang & Li, 2017 Acroclita liui Zhang & Li, 2017: 32. TL: China, Qinghai Province, Xunhua County; TD: NKUM. Specimens examined. 1♁, Qinghai Province, Xunhua County (35.50 °N, 102.28 °E), alt. 2240 m, 15 July 1995, leg. Li H.H. & Wang S.X. (genitalia slide no. ZAH04097); 2 ♁, Sichuan Province, Jiuzhaigou, alt. 2700 m, 13 August 2002, leg. Hao S.L. (genitalia slide no. ZAH04186); 1♁ 1♀, Sichuan Province, Jiuzhaigou, alt. 2350 m, 18 August 2002, leg. Hao S.L. (genitalia slide nos. ZAH04313, ZAH04314); 1♀, Sichuan Province, Jiuzhaigou, alt. 2250 m, 19 August 2002, leg. Hao S.L.; 7 ♁, Shaanxi Province, Xunyi County, Malan Forestry Station, 30~ 31 May 1984, leg. Li H.H.; 1♁ 2♀, Sichuan Province, Kangding County, alt. 2400 m, 8 July 2001, leg. Li H.H. & Wang X.P. (genitalia slide nos. ZAH04320, ZAH04321); 1♁ 14♀, Gansu Province, Yuzhong County, Mt. Xinglong, alt. 2120~ 2130 m, 30 July ~ 2 August 1993, leg. Li H.H. (genitalia slide no. MZ96122); 1 ♁, Gansu Province, Yuzhong County, Mt. Xinglong (East Mt.), alt. 2230 m, 1 August 1993, leg. Li H.H. (genitalia slide no. MZ96123); 1♁ 2♀, Sichuan Province, Wolong Nature Reserve, 25 July 2005, leg. Yu H.L. (genitalia slide nos. ZAH10001, ZAH10002); 1♀, Qinghai Province, Xunhua County, alt. 2240 m, 13 July 1995, leg. Li H.H. & Wang S.X.; 1 ♁, Shaanxi Province, Ningshan County, Huoditang, alt. 1620 m, 24 May 1990, leg. Li H.H.; 1 ♁, Shaanxi Province, Yangling, 14 July 1985, leg. Li H.H. Host plant. Unknown. Distribution. China (Sichuan, Shaanxi, Gansu, Qinghai); Japan. Remarks. This species is similar to A. elaeagnivora Oku, but can be distinguished by the following characters: socius long and narrow, horn-shaped; ventral margin of basal opening with a nearly triangular process; and cucullus about three times as long as wide. In A. elaeagnivora the socius is much longer and hook-like; the ventral margin of the basal opening bears a process with a blunt termination; and the cucullus is about twice as long as wide. This species is also similar to A. digitata Zhang & Li, but can easily be separated by its long, horn-shaped socii, and U-shaped sterigma. In A. digitata the socius is digitate, and the sterigma is bilateral, crescent-shaped.Published as part of Zhang, Aihuan, 2023, Systematic study of Chinese Acroclita Lederer (Lepidoptera: Tortricidae), with the description of a new species, pp. 195-200 in Zootaxa 5228 (2) on pages 198-199, DOI: 10.11646/zootaxa.5228.2.7, http://zenodo.org/record/753232
A hierarchical MPC scheme for interconnected systems
No full textThis paper describes a hierarchical control scheme for interconnected systems. The higher layer of the control structure is designed with robust Model Predictive Control (MPC) based on a reduced order dynamic model of the overall system and is aimed at optimizing long-term performance, while at the lower layer local regulators acting at a higher frequency are designed for the full order models of the subsystems to refine the control action
Numerical study on regime shifts in an urban subtropical shallow lake: Xinglong Lake, China
No full textAquatic ecosystem degradation is a considerable challenge of global interest. Although substantial efforts have been accomplished to restore phytoplankton-dominated shallow lakes to a clear state with high coverage of submerged macrophytes, the phenomenon, driving mechanism, and threshold range of such nonlinear regime shifts remain unclear. Here, we constructed an aquatic ecological model based on PCLake, simulated and predicted the aquatic ecological changes before and after treatments of Xinglong Lake, a subtropical artificial shallow lake that had been completed ecological restoration in Chengdu, China. The model included the future prediction of TN, TP, Chl-a, and aquatic vegetation biomass, as well as the threshold of regime shifts using bifurcation analysis. We also quantified the impact of some common management measures (point and non-point source pollution control, water level regulation) on the stability of the lake's aquatic ecosystem. The results showed that the thresholds of Xinglong Lake from a clear state to a turbid state were 1.405 mg/m2/day and vice versa 0.68 mg/m2/day, indicating its initial turbidity and transitional state after treatment. After treatment, phosphorus loads still exceeded the threshold for a clear-water state, while the non-point source pollution of Xinglong Lake accounted for more than 80%. To prevent the aquatic ecosystem from collapsing in the future, it is necessary to combine upstream water quality improvement, runoff and air pollution control to reduce total pollution by 60%. Reasonable water level regulation, such as adjusting the water level downwards by 0.5 m in spring, is beneficial in maintaining the health and stability of aquatic ecosystems. The present study can be used to evaluate the effectiveness of the management measures of Xinglong Lake as well as to provide scientific support for the management of shallow lakes
Maiestas samuelsoni Knight
No full textMaiestas samuelsoni (Knight) (Fig. 16; Plate II: G) New record. Deltocephalus samuelsoni Knight, 1976: 96 –97, Figs 4 a–c. Maiestas samuelsoni, Webb & Viraktamath, 2009: 19, Fig. 41. Material examined. China, Sichuan Prov.: 2 ɗɗ, 1650m, August 1999, coll. Ma Ning; Guangdong Prov.: 2 ɗɗ, Shenzhen, July 1986; Hainan Prov.: 1 ɗ, Xinglong, 23 April 1983, at light; 1 ɗ, Xinglong, 28 April 1983; 2 ɗɗ, Liangyuan, 29 May 1983, at light; 1 ɗ, Lingshui, 6 May 1983, at light (BMNH); 1 ɗ, Yacheng, 8 June 1983; 1 ɗ, Yacheng, 8 June 1983, at light. All collected by Zhang Yalin and NWAFU, except where indicated. Distribution. Pacific islands (Kermadec; Norfolk Is.; Fiji; Philippines) and China (Sichuan, Guangdong, Hainan). Remarks. This is the first record of this species from mainland Asia.Published as part of Zhang, Yalin & Duan, Yani, 2011, Review of the Deltocephalus group of leafhoppers (Hemiptera: Cicadellidae: Deltocephalinae) in China, pp. 1-47 in Zootaxa 2870 on page 18, DOI: 10.5281/zenodo.20611
Kolla procerula Feng & Zhang, sp. nov.
No full textKolla procerula Feng & Zhang sp. nov. (Figs. 1 I–L, 4 A–H) Description. Crown with large median semicircular black spot touching basal margin, apical margin with pair of large black submedial maculae and small median black spot; face dark yellow with distinct clypeal muscle impressions; pronotum and scutellum black except small apical area of scutellum yellow; forewing black except for narrow transparent yellow stripe along costal margin. Male pygofer with a group of macrosetae located posterodorsally and evenly distributed microsetae on disk; ventral process with fine microsetae distributed evenly on basal half, distal half slender, twisted, extending slightly beyond pygofer apex; plates each with inner margin slightly concave near midlength, outer margin oblique, with uniseriate macrosetae and densely covered by long fine setae; aedeagus evenly curved dorsad in lateral view, shaft with lobes small and acute in lateral view, with short protuberance between them in caudoventral view. Measurement. Length of male 5.4–5.6 mm. Material examined. Holotype: ♂, China, Hebei Province, Weixian, 20 June 2009, coll. Qin Daozheng; Paratypes: 1 ♂, China, Ningxia Hui Autonomous Region, Liupanshan Mountain, 22 June 2008, coll. Meng Qiulei; 1 ♂, China, Gansu Province, Xinglong Mountain Nature Reserve, 27 July 2012, coll. Xue Qingquan. Remarks. This species is similar to K. atramentaria (Motschulsky, 1859), but can be easily distinguished from the latter by the different color pattern, less strongly produced head (Figs 1 I- 1 L), male plates densely covered by long fine setae (Figs 4 A, 4 B), and aedeagal shaft with lobes small and acute with a short protuberance between them (Fig. 4 G). Etymology. This new specific epithet is derived from the Latin word “procerulus”, referring to the short protuberance between two aedeagal shaft lobes.Published as part of Feng, Ling & Zhang, Yalin, 2015, Leafhopper genus Kolla Distant (Hemiptera: Cicadellidae: Cicadellinae) with descriptions of four new species from China, pp. 430-438 in Zootaxa 3999 (3) on pages 435-436, DOI: 10.11646/zootaxa.3999.3.8, http://zenodo.org/record/23624
Consociata sinensis Qin & Zhang, 2006, n. sp.
No full text<i>Consociata sinensis</i> n. sp. <p>(Figs. 12–24)</p> <p> <b>Type material.</b> Holotype –male: Xinglong, Hainan Province, China, 23 April 1983, coll. Yalin Zhang, by light trap. Paratypes –one male; two females: same data as holotype.</p> <p> <b>Description.</b> Macropterous form: body length 2.1–2.2 mm (male) and 2.7–2.9 mm (female); body length including tegmen 3.3–3.4 mm (male) and 3.5–3.8 mm (female); tegmen length 2.8–2.9 mm (male) and 2.9–3.5 mm (female).</p> <p>General color orange­yellow. Eyes black. Ocelli blackish brown. Tegmen hyaline, light orange­yellow.</p> <p>Structural characters as in generic description. Pygofer in profile longer ventrally than dorsally, in posterior view with opening wider than long. Phallus slender and curved, apex lamellate, reflected cephalad with a process. Suspensorium with arms about half as long as stem. Diaphragm with dorsal margin deeply concave. Opening for genital styles evenly curved at dorsal margin. Left and right genital styles fused, greatly divergent in opposite direction apically.</p> <p> <b>Etymology.</b> The specific name refers to its distribution in China.</p> <p> <b>Distribution.</b> Southern China (Hainan Province).</p>Published as part of <i>Qin, Dao-Zheng & Zhang, Ya-Lin, 2006, Two new genera and two new species of Delphacidae (Hemiptera: Fulgoroidea) from China, pp. 61-68 in Zootaxa 1204</i> on pages 66-67, DOI: <a href="http://zenodo.org/record/172362">10.5281/zenodo.172362</a>
The genesis and age of karst caves in Xinglong National Geopark, Hebei Province
Full text linkObjective Karst caves, as an essential part of the Earth's Critical Zone, hold significant scientific and scenic value. However, previous studies have largely overlooked the tectonic factors influencing cave formation, and quantitative constraints on the age of cave formation remain scarce. This study aims to investigate the genesis and chronology of the Xinglong Karst Cave in the Taojiatai area of Hebei Province, elucidating the controlling factors and temporal constraints of cave development. Methods A comprehensive investigation of cave morphology, stratigraphic attitude, and tectonic characteristics was conducted, supplemented by mineralogical analysis using X-ray diffraction and geochemical element analysis. The study analyzed the relationship between cave formation and fault activity, while the geochemical composition of red clay deposits inside the cave was compared with external weathering crusts to constrain the formation age of the cave. Results The cave developed within Middle Proterozoic dolomitic limestone containing flint nodules, influenced by two major faults that facilitated differential dissolution along fault planes. The red clay deposits inside the cave share geochemical characteristics with external weathering crusts, indicating an exogenous origin. The enrichment of iron in red stalactites suggests leaching from surface water, further confirming the post-weathering deposition of the red clay. Regional comparisons reveal that the residual red clay outside the cave corresponds to the Tangxian planation period (3.1–3.7 Ma), indicating that the cave must have formed after this period. Conclusion This study provides new insights into the fault-controlled genesis of the Xinglong Karst Cave and establishes a minimum formation age of 3.7 Ma, significantly younger than the Middle Proterozoic age of the host rock. The findings correct the previous misconception that the cave formed during the Proterozoic and highlight the crucial role of tectonic activity in cave development. [ Significance ] This research enhances our understanding of the tectonic control and chronological constraints of karst cave formation, providing valuable references for the study of karst landscapes in other regions
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