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@arXiv_mathST_bot@mastoxiv.page
2025-09-10 09:44:41

Matrix-variate integer-valued autoregressive processes
Nuo Xu, Kai Yang, Fukang Zhu
arxiv.org/abs/2509.07347 arxiv.org/pdf/2509.07347

Matrix-variate integer-valued autoregressive processes
In the fields of sociology and economics, the modeling of matrix-variate integervalued time series is urgent. However, no prior studies have addressed the modeling of such data. To address this topic, this paper proposes a novel matrix-variate integer-valued autoregressive model. The key techniques lie in defining two leftand right-matricial thinning operators. The probabilistic and statistical properties of the proposed model are investigated. Furthermore, two estimation methods are developed:…

@leftsidestory@mstdn.social
2025-07-30 01:12:29

Urban Diaspora VI 🏮
城市放逐 VI 🏮
📷 Nikon FE
🎞️Ilford FP4 Plus, expired 1994
buy me ☕️ ?/请我喝杯☕️？
#filmphotography

Ilford FP4 Plus 125 (FF) English alt text: Outdoor street scene with a group of people gathered around a sidewalk near a tree. In the center, a sign with Chinese characters. The sign promotes different types of cold jelly noodles, suggesting a food stall nearby. The mood appears casual, with individuals sitting and standing around, possibly waiting or socializing. 中文替代文字： 街边场景，一群人围绕在人行道边的树下。中间的牌子暗示附近有凉粉摊位。人们坐着或站着，气氛轻松，可能在等待或聊天。
Ilford FP4 Plus 125 (FF) English alt text: Street view featuring a white car parked outside a building with two Chinese signs. One sign reads “Community Drug Rehabilitation (Recovery) Workstation” and the other reads “Care Workstation.” A few pedestrians walk nearby, a scooter is parked alongside, and the building has potted plants on the balcony and air conditioning units installed. 中文替代文字： 街景中，一辆白色汽车停在一栋建筑物前，建筑物上挂有两个中文标志，一个写着“社区戒毒（康复）工作站”，另一个写着“关爱工作站”。人行道上有行人经过，旁边停有一辆电动车，建筑阳台上摆放着植物并安装有空调设备。
Ilford FP4 Plus 125 (FF) English alt text: Black-and-white photo of a bustling market stall. A person stands behind a counter stacked with open white boxes, likely containing produce. A bold handwritten sign marked “12.8” in the foreground suggests a price for the goods. The scene is filled with fruits, vegetables, and various signage, creating a sense of everyday commerce. The grayscale tone gives it a timeless, nostalgic feel. 中文替代文字： 黑白市场景象，一人站在摆满白色箱子的摊位后，箱子里可能装着各类农产品。前方有一个醒目的手写标价牌“12.8”，暗…
Ilford FP4 Plus 125 (FF) English alt text: Black-and-white street scene showing a person standing behind a cart labeled with Chinese characters. The cart displays the phrase “自贡冷吃兔,” suggesting it sells cold spicy rabbit, a specialty from Zigong. Multiple motorcycles are parked nearby. Urban elements like buildings, cars, and a bus in the background convey a busy city atmosphere. 中文替代文字： 黑白街景中，一人站在写有中文标志的小推车后。推车上显示“自贡冷吃兔”，表明售卖的是自贡特色的冷吃兔。周围停放着多辆摩托车，背景中的楼房、汽车和公交车营造出繁忙的都市氛围。